JP6665680B2 - Wiping range expanding wiper device and method of controlling wiping range expanding wiper device - Google Patents

Description

  The present invention relates to a wiping range expanding wiper device capable of expanding a wiping range and a control method of the wiping range expanding wiper device.

  In a vehicle wiper device for wiping a windshield glass or the like of an automobile, a wiper arm to which a wiper blade is attached is reciprocated between a lower reversing position and an upper reversing position by a wiper motor. In many cases, the trajectory of the operation of the wiper arm is substantially arc-shaped around the pivot axis of the wiper arm. Therefore, the wiping range, which is the area where the wiper blade wipes the windshield glass or the like, has a substantially fan shape centered on the pivot axis.

  In the vehicle wiper device, it is necessary to preferentially wipe the windshield glass on the driver's seat side in order to ensure the driver's view. In addition, the windshield glass of an automobile has a substantially equilateral trapezoidal shape. Therefore, in a parallel (tandem) type wiper device in which two wiper arms rotate simultaneously in the same direction, when the pivot shaft is provided below the windshield glass, the upper inversion position of the wiper blade on the driver's seat side is substantially the same. It is provided in parallel with the leg near the driver's seat side (vertical side of the isosceles trapezoid) of the windshield glass exhibiting an isosceles trapezoid.

  The upper turning position of the wiper blade on the passenger seat side of the tandem-type wiper device is also provided in parallel with the driver-side leg of the windshield glass in order to preferentially wipe the windshield glass on the driver side. However, as described above, the wiping range of the wiper blade is substantially fan-shaped, so that when the upper inversion position is provided at the above-described position, an area that is not wiped around the upper corner of the windshield glass on the passenger seat side. Occurs.

  Patent Document 1 discloses a wiper device in which the link mechanism of the wiper device is a so-called four-node link, so that the entire length of the operating wiper arm is apparently extended, thereby expanding the wiping range of the windshield glass on the passenger seat side. It has been disclosed.

  In the wiper device described in Patent Document 1, as shown in FIG. 16, the driving force of the motor is transmitted to the passenger's seat side wiper arm 150P via the four-bar link mechanism 160, so that the passenger's seat side wiper blade 154P is moved. The wiping range Z12 between the lower reversing position P4P and the upper reversing position P3P is wiped. In FIG. 16, the wiping range Z10 is a wiping range of the wiper device that does not have the four-bar linkage 160 and operates the wiper arm about the pivot axis. As shown in FIG. 16, the wiper device described in Patent Literature 1 is capable of wiping a portion closer to the upper corner of the windshield glass 1 on the passenger seat side than the wiper device without the four-bar linkage 160. Has become.

JP-A-2000-25578

  However, even in the wiper device described in Patent Document 1, as shown in FIG. 16, the extension of the wiper arm on the passenger seat side during operation is not sufficient, and the wiper arm is left behind on the windshield glass 1 on the passenger seat side. The non-wiping range 158 that is In order to suppress the occurrence of the non-wiping range 158, the fulcrum of the passenger seat side wiper arm 135 as shown in FIG. 17 is moved by a driving force of a second motor different from the first motor for reciprocating the wiper arm. There has been proposed a wiper device for moving the shield glass 1 upward on the passenger seat side. In the wiper device illustrated in FIG. 17, the front passenger side wiper blade 136 wipes the wiping range Z <b> 2, so that the front passenger seat side front view can be widely secured.

  The transition between the normal wiping operation for wiping the wiping range Z1 and the enlarged wiping operation for wiping the wiping range Z2 is performed, for example, during the forward movement of wiping the passenger seat side wiper blade 136 from the lower inversion position to the upper inversion position. The normal wiping operation is performed at the time of the return movement in which the enlarged wiping operation is performed and the passenger side wiper blade 136 is wiped from the upper inverted position to the lower inverted position. However, the wiping operation is stopped after the wiping operation is stopped in an abnormal state (position) due to the resistance of a snow puddle during the wiping operation of the passenger side wiper blade 136 between the lower reversing position and the upper reversing position. Is restarted, the passenger's seat side wiper arm 135 may be rapidly contracted, and may shift to the normal wiping operation of the backward movement. The sudden movement of the passenger seat side wiper arm 135 and the passenger seat side wiper blade 136 may cause the user to feel uncomfortable.

The reason that the passenger seat side wiper arm 135 is rapidly contracted is that the rotation of the second motor for expanding and contracting the passenger seat side wiper arm 135 is suddenly started. For example, in the wiper device shown in FIG. 17, the rotation angle θ _{B of the} motor that expands and contracts the front passenger seat wiper arm 135 is determined according to the rotation angle θ _{A of the} motor that swings the front passenger seat wiper arm 135 in FIG. Control is performed according to a curve 300 and a straight line 302 indicating a rotation angle map.

A curve 300 in FIG. 18 is a rotation angle map in the enlarged wiping operation, and a straight line 302 is a rotation angle map in a normal wiping operation that is not the enlarged wiping operation. A point 304 in FIG. 18 indicates the angles θ _A and θ _B when the wiping operation is stopped in an abnormal state (position).

The control circuit of the wiper device shown in FIG. 17 performs the control of the enlarged wiping operation during the forward movement, and when the wiping operation of the passenger side wiper blade 136 is stopped by the snow puddle 170 from the stop position. A return by the normal wiping operation is started. However, the point 304 corresponding to the stop position (the abnormal position) on the windshield glass 1 of the passenger side wiper blade 136 is on the curve 300 for the enlarged wiping operation, and the point 304 is the normal wiping operation. There is an angle difference of Δθ _{p from} the straight line 302 for The control circuit of the wiper device shown in FIG. 17 immediately returns the angles θ _A and θ _B indicated by the point 304 deviating from the straight line 302 to the angle defined by the straight line 302.

Specifically, it is the angle theta _A showing the point 304, the angle indicating the angle theta _B is the point 304, abruptly changing the angle at which the straight line 302 represents. As a result, the second motor for expanding and contracting the passenger seat side wiper arm 135 is rapidly rotated, and the passenger seat side wiper arm 135 is rapidly expanded and contracted.

  The present invention has been made in view of the above, and has a wiping range expanding wiper device and a wiping range expanding wiper device capable of changing the amount of expansion and contraction of a wiping range without discomfort by a reversing operation after the wiping operation is hindered by an external force such as a snow puddle. The purpose of the present invention is to provide a control method.

  In order to solve the above problem, a wiper range expanding wiper device according to claim 1, wherein a first motor that causes a wiper blade connected to a tip end of a wiper arm to perform a wipe operation on a windshield by rotation of a first output shaft; The rotation of the second output shaft activates a telescopic mechanism provided on the wiper arm to expand and contract the wiping range of the windshield by the wiper blade, and the wiping range of the windshield by the wiper blade reciprocates. The rotation of the first motor and the second motor is controlled so as to be expanded and contracted at different amounts on one side and the other side of the path, and the wiper blade is provided with an indeterminate position other than a predetermined stop position on one of the reciprocating paths. When the vehicle stops at the position, the amount of enlargement / reduction after reversing from the unstable position gradually changes to the other amount of enlargement / reduction on the reciprocating path. A control unit for controlling the rotation of the first motor and the second motor so as to include a.

  The second motor according to this wiper range expanding wiper device is a drive source for extending and retracting the extendable mechanism of the wiper arm in order to change (expand) the wiping range of the windshield by the wiper blade. By changing (enlarging) the wiping range of the windshield by the wiper blade, the wiper blade can wipe the windshield to a region near the upper corner on the passenger seat side of the windshield.

  In addition, when the wiper blade is turned over at a stop position other than a predetermined position by changing the amount of expansion or contraction of the wiping range, the wiper range enlarging wiper device is configured to perform the wiper blade enlargement / reduction amount before the inversion during the wiping operation of the wiper blade. The rotation of the first motor and the second motor is controlled such that gradually changes to the changed amount of expansion and contraction. By the rotation control of the first motor and the second motor, it is possible to perform control to change the amount of enlargement / reduction of the wiping range without discomfort in the reversing operation after the wiping operation is hindered by the external force.

  The wiping range expanding wiper device according to claim 2 is the wiping range expanding wiper device according to claim 1, wherein the control unit is configured to control the second output shaft during the wiping operation of the wiper blade inverted at the indefinite position. The rotation of the first motor and the second motor is controlled so that the rotation angle of the first motor and the second motor gradually changes to a rotation angle corresponding to the other amount of expansion and contraction of the reciprocating path.

  According to this wiping range enlarging wiper device, when the wiper blade is reversed at a stop position other than the predetermined position by changing the amount of expansion and contraction of the expansion and contraction mechanism, the rotation angle of the second output shaft is changed according to the changed amount of expansion and contraction. The rotation of the first motor and the second motor is controlled so as to gradually change to the rotation angle. By the rotation control of the first motor and the second motor, it is possible to perform control to change the amount of enlargement / reduction of the wiping range without discomfort in the reversing operation after the wiping operation is hindered by the external force.

  According to a third aspect of the present invention, in the wiping range expanding wiper device according to the second aspect, a first rotation angle detection unit that detects a rotation angle of the first output shaft, and a rotation of the second output shaft. A second rotation angle detection unit that detects an angle; and a storage unit that stores rotation angle information that determines the rotation angle of the second output shaft with respect to the rotation angle of the first output shaft in accordance with different amounts of expansion and contraction. The control unit includes a rotation angle of the second output shaft detected by the second rotation angle detection unit corresponding to a rotation angle of the first output shaft detected by the first rotation angle detection unit. The rotation of the first motor and the second motor is controlled so as to gradually change to a rotation angle corresponding to the other amount of expansion and contraction of the reciprocating path in the rotation angle information.

  According to the wiping range expanding wiper device, based on the rotation angle of the first output shaft and the rotation angle of the second output shaft respectively measured by the first rotation angle detection unit and the second rotation angle detection unit, which are sensors. The rotation angle of the second output shaft detected by the second rotation angle detection unit is linked to the rotation angle of the first output shaft detected by the first rotation angle detection unit, and the rotation according to the changed scaling amount is changed. The rotation of the first motor and the second motor is controlled so as to gradually change to an angle. By the rotation control of the first motor and the second motor, it is possible to perform control to change the amount of enlargement / reduction of the wiping range without discomfort in the reversing operation after the wiping operation is hindered by the external force.

  According to a fourth aspect of the present invention, in the wiping range widening wiper device according to the third aspect, the control unit is configured to detect the second output shaft detected by the second rotation angle detection unit at the indefinite position. The rotation angle, the minimum value and the maximum value according to the difference between the rotation angle of the second output shaft when the other expansion and contraction amount of the reciprocating path is applied at the undefined position in the rotation angle information, While using the correction value that monotonically changes from the minimum value to the maximum value with respect to the rotation angle of the output shaft in a predetermined range, while the first output shaft rotates at the rotation angle in the predetermined range, The rotation of the first motor and the second motor such that the rotation angle of the second output shaft detected by the two rotation angle detector gradually changes to a rotation angle corresponding to the other amount of expansion and contraction of the reciprocating path. Control.

  According to this wiping range enlarging wiper device, when the wiper blade is reversed at a stop position other than the predetermined position by changing the enlargement / reduction amount of the wiping range, the rotation angle of the second output shaft at the stop position and the stop position The rotation angle of the second output shaft is adjusted to a rotation angle corresponding to the changed scaling amount by using the correction value corresponding to the difference between the changed rotation amount and the second output shaft when the changed scaling amount is applied. The rotation of the first motor and the second motor is controlled so as to change gradually. By the rotation control of the first motor and the second motor, it is possible to perform control to change the amount of enlargement / reduction of the wiping range without discomfort in the reversing operation after the wiping operation is hindered by the external force.

  The wiper range enlarging wiper device according to claim 5 is the wiper range enlarging wiper device according to claim 3 or 4, wherein the controller is configured such that the amount of expansion and contraction on the other side of the reciprocating path is the amount of expansion and contraction on one side of the reciprocating path. In the case of being set to be larger, the amount of enlargement / reduction after being reversed from the indefinite position in the other side of the reciprocating path until the rotation angle of the second output shaft becomes maximum in the wiping operation on the other side of the reciprocating path. The rotation of the first motor and the second motor is controlled so as to perform a transition operation that matches the amount of expansion / contraction of the first motor.

  According to this wiping range enlarging wiper device, when the amount of expansion and contraction on the other side of the reciprocating path is larger than the amount of expansion and contraction on one side of the reciprocating path, the rotation angle of the second output shaft is maximized in the wiping operation on the other side of the reciprocating path. By the time, the amount of expansion and contraction is matched with the other amount of expansion and contraction of the reciprocating path. By changing the enlargement / reduction amount in this way, it is possible to smoothly control the wiping operation of the wiper blade inverted at the unfixed position.

  According to a sixth aspect of the present invention, in the wiping range expanding wiper device according to the third or fourth aspect, the control unit may be configured so that the amount of expansion and contraction on the other side of the reciprocating path is the amount of expansion and contraction on one side of the reciprocating path. In the case where the rotation angle of the second output shaft is maximized in the wiping operation on the other side of the reciprocating path in the wiping operation on the other side of the reciprocating path, the amount of expansion and contraction after reversing from the indefinite position is set to The rotation of the first motor and the second motor is controlled so as to perform a transition operation that matches the amount of expansion / contraction of the first motor.

  According to this wiping range enlarging wiper device, when the amount of expansion and contraction on the other side of the reciprocating path is smaller than the amount of expansion and contraction on one side of the reciprocating path, the rotation angle of the second output shaft is maximized in the wiping operation on the other side of the reciprocating path. After that, the enlargement / reduction amount is made to match the other enlargement / reduction amount on the reciprocating path. By changing the enlargement / reduction amount in this way, it is possible to smoothly control the wiping operation of the wiper blade inverted at the unfixed position.

  In order to solve the above-mentioned problem, a control method of the wiper range enlarging wiper device according to claim 7, wherein the wiper arm is operated such that a wiper blade connected to a tip end portion of the wiper arm performs a wiping operation on a windshield. While controlling the rotation of the first output shaft of the motor, the wiping range of the windshield by the wiper blade is expanded and contracted by different amounts of expansion and contraction on one side and the other side of the reciprocating path by operating a telescopic mechanism provided on the wiper arm. The wiping step for controlling the rotation of the second output shaft of the second motor so that the wiper blade stops at an undefined position other than a predetermined stop position on one of the reciprocating paths. Rotation of the first motor and the second motor so that the amount of enlargement / reduction after reversing gradually changes to the other amount of enlargement / reduction in the reciprocating path. And scaling amount changing step of controlling includes.

  The second motor according to the control method of the wiping range expanding wiper device is a drive source for extending and retracting the extendable mechanism of the wiper arm to change (enlarge) the wiping range of the windshield by the wiper blade. By changing (enlarging) the wiping range of the windshield by the wiper blade, the wiper blade can wipe the windshield to a region near the upper corner on the passenger seat side of the windshield.

  Further, the control method of the wiping range expanding wiper device is such that when the wiper blade is reversed by changing the amount of expansion or contraction of the wiping range at a stop position other than the predetermined position, after the reversal, before the reversal during the wiping operation of the wiper blade. The rotations of the first motor and the second motor are controlled so that the amount of expansion / contraction gradually changes to the changed amount of expansion / contraction. By the rotation control of the first motor and the second motor, it is possible to perform control to change the amount of enlargement / reduction of the wiping range without discomfort in the reversing operation after the wiping operation is hindered by the external force.

  The control method of the wiping range enlarging wiper device according to claim 8 is the control method of the wiping range enlarging wiper device according to claim 7, wherein the enlarging / reducing amount changing step is a wiping operation of the wiper blade inverted at the indefinite position. During this, the rotation of the first motor and the second motor is controlled such that the rotation angle of the second output shaft gradually changes to a rotation angle corresponding to the other amount of expansion and contraction of the reciprocating path.

  According to the control method of the wiping range enlarging wiper device, when the wiper blade is reversed by changing the amount of expansion or contraction of the wiping range at a stop position other than the predetermined position, the rotation angle of the second output shaft is changed after the change. The rotation of the first motor and the second motor is controlled so as to gradually change to a rotation angle corresponding to the amount. By the rotation control of the first motor and the second motor, it is possible to perform control to change the amount of enlargement / reduction of the wiping range without discomfort in the reversing operation after the wiping operation is hindered by the external force.

  According to a ninth aspect of the present invention, in the control method of the wiping range widening wiper device according to the eighth aspect, a first rotation angle detecting step of detecting a rotation angle of the first output shaft; A second rotation angle detecting step of detecting a rotation angle of the second output shaft, wherein the enlargement / reduction amount changing step includes changing the rotation angle of the second output shaft with respect to the rotation angle of the first output shaft to a different amount. And the rotation angle information of the second output shaft detected in the second rotation angle detection step is referred to as the first output shaft detected in the first rotation angle detection step. The rotation of the first motor and the second motor is gradually changed to a rotation angle corresponding to the other amount of expansion and contraction of the reciprocating path in the rotation angle information corresponding to the rotation angle of To your.

  According to the control method of the wiping range expanding wiper device, based on the rotation angle of the first output shaft and the rotation angle of the second output shaft actually measured in the first rotation angle detection step and the second rotation angle detection step, The rotation angle of the second output shaft detected by the second rotation angle detection unit is linked to the rotation angle of the first output shaft detected by the first rotation angle detection unit, and the rotation according to the changed scaling amount is changed. The rotation of the first motor and the second motor is controlled so as to gradually change to an angle. By the rotation control of the first motor and the second motor, it is possible to perform control to change the amount of enlargement / reduction of the wiping range without discomfort in the reversing operation after the wiping operation is hindered by the external force.

  According to a tenth aspect of the present invention, in the control method of the wiping range widening wiper device according to the ninth aspect, the enlarging / reducing amount changing step is detected by the second rotation angle detecting step at the indefinite position. And a minimum value and a maximum value according to a difference between the rotation angle of the second output shaft and the rotation angle of the second output shaft when the other amount of expansion and contraction of the reciprocating path is applied at the unfixed position. Using a correction value that monotonically changes from the minimum value to the maximum value with respect to the rotation angle of the first output shaft in a predetermined range, while the first output shaft rotates at the rotation angle in the predetermined range. The first motor and the second motor so that the rotation angle of the second output shaft detected by the second rotation angle detection step gradually changes to a rotation angle corresponding to the other amount of expansion and contraction of the reciprocating path. Motor rotation Control to.

  According to the control method of the wiping range expanding wiper device, when the wiper blade is reversed by changing the amount of expansion or contraction of the wiping range at a stop position other than the predetermined position, the rotation angle of the second output shaft at the stop position, Using the correction value corresponding to the difference between the rotation angle of the second output shaft and the rotation angle of the second output shaft when the changed rotation amount is applied at the stop position, the rotation angle of the second output shaft is changed according to the changed rotation amount. The rotation of the first motor and the second motor is controlled so as to gradually change to the rotation angle. By the rotation control of the first motor and the second motor, it is possible to perform control to change the amount of enlargement / reduction of the wiping range without discomfort in the reversing operation after the wiping operation is hindered by the external force.

  The control method of the wiping range enlarging wiper device according to claim 11 is the control method of the wiping range enlarging wiper device according to claim 9 or 10, wherein the enlarging / reducing amount changing step includes the step of: When the amount of expansion and contraction is set to be larger than that of one of the reciprocating paths, the rotation angle of the second output shaft is maximized in the wiping operation of the other side of the reciprocating path after the amount of reversal from the indeterminate position is reversed. By this, the rotations of the first motor and the second motor are controlled so as to perform a transition operation to match the amount of expansion / contraction on the other side of the reciprocating path.

  According to the control method of the wiper range expanding wiper device, when the amount of expansion and contraction on the other side of the reciprocating path is larger than the amount of expansion and contraction on one side of the reciprocating path, the rotation of the second output shaft is performed in the wiping operation on the other side of the reciprocating path. The enlargement / reduction amount is made to match the other enlargement / reduction amount of the reciprocating path until the angle becomes maximum. By changing the enlargement / reduction amount in this way, it is possible to smoothly control the wiping operation of the wiper blade inverted at the unfixed position.

  According to a twelfth aspect of the present invention, there is provided a control method of the wiping range enlarging wiper device according to the ninth or tenth aspect, wherein the enlarging / reducing amount changing step includes the step of: When the amount of expansion and contraction is set to be smaller than that of one of the reciprocating paths, the rotation angle of the second output shaft becomes the maximum in the wiping operation of the other side of the reciprocating path after the amount of inversion after reversing from the unstable position. Then, the rotation of the first motor and the second motor is controlled so as to perform a transition operation to match the amount of expansion / contraction on the other side of the reciprocating path.

  According to the control method of the wiper range expanding wiper device, when the amount of expansion and contraction on the other side of the reciprocating path is smaller than the amount of expansion and contraction on one side of the reciprocating path, the rotation of the second output shaft is performed in the wiping operation on the other side of the reciprocating path. After the angle becomes maximum, the amount of enlargement / reduction is made to match the other amount of enlargement / reduction of the reciprocating path. By changing the enlargement / reduction amount in this way, it is possible to smoothly control the wiping operation of the wiper blade inverted at the unfixed position.

1 is a schematic diagram illustrating an example of a vehicle wiper system including a wiper range expanding wiper device according to an embodiment of the present invention. It is a top view in the stop state of the wiping range expansion wiper device according to the embodiment of the present invention. FIG. 3 is a sectional view of a second holder member taken along line AA of FIG. 2. It is a top view during operation of the wiping range expansion wiper device concerning an embodiment of the invention. It is a top view during operation of the wiping range expansion wiper device concerning an embodiment of the invention. It is a top view during operation of the wiping range expansion wiper device concerning an embodiment of the invention. It is a top view during operation of the wiping range expansion wiper device concerning an embodiment of the invention. It is a top view during operation of the wiping range expansion wiper device concerning an embodiment of the invention. FIG. 2 is a circuit diagram schematically illustrating a circuit of the wiper system according to the embodiment of the present invention. 5 is an example of a second output shaft rotation angle map defining a rotation angle of a second output shaft according to a rotation angle of a first output shaft according to the embodiment of the present invention. (A) is an explanatory view showing a case in which the front passenger seat-side wiper blade is stopped at the time of forward movement due to a snow puddle, and is then reversed and moved backward at the stop position, and (B) is a diagram showing the correction value X; It is explanatory drawing which showed one aspect. (A) is an explanatory view showing a case where the front passenger seat-side wiper blade is stopped at the time of backward movement due to a snow puddle, and is then reversed and moved forward at the stop position, and (B) is a diagram of the correction value X; It is explanatory drawing which showed one aspect. In the wiping range enlarging wiper device according to the embodiment of the present invention, the passenger seat side wiper blade is stopped at the stop position at the time of return movement in which the amount of expansion and contraction is suppressed by a snow puddle, and then is reversed and moved forward, and the amount of expansion and contraction is increased. FIG. 5 is an explanatory diagram showing a case where the passenger seat side wiper blade is stopped at a stop position by a snow puddle and also turned over at the time of forward movement where is increased. In the wiping range expanding wiper device according to the embodiment of the present invention, the passenger seat side wiper blade is stopped at the stop position at the time of re-moving in which the amount of expansion and contraction is increased due to a snow pool, then reversed and moved forward to reduce the amount of expansion and contraction. FIG. 7 is an explanatory diagram showing a case where the passenger seat side wiper blade is stopped at a stop position and then turned over even during a suppressed forward movement due to a snow pool. It is the flowchart which showed an example of the snow pool processing in the wiping range expansion wiper apparatus which concerns on embodiment of this invention. It is the schematic which showed an example of the wiper apparatus which has a four-bar link mechanism. It is the schematic which showed an example of the wiping range expansion wiper apparatus. It is an example of the 2nd output shaft rotation angle map which prescribed the rotation angle of the 2nd output shaft according to the rotation angle of the 1st output shaft in the wiping range expansion wiper device.

  FIG. 1 is a schematic diagram showing an example of a wiper system 100 including a wiper range enlarging wiper device (hereinafter, referred to as “wiper device”) 2 according to an embodiment of the present invention. The wiper system 100 shown in FIG. 1 is for wiping a windshield glass 1 as a “wind shield” provided in a vehicle such as a passenger car, for example, and includes a pair of wiper arms (a driver's seat side wiper arm described later). 17 and the passenger side wiper arm 35), the first motor 11, the second motor 12, the control circuit 52, the drive circuit 56, and the washer device 70.

  Since FIG. 1 shows a case of a right-hand drive vehicle, the right side of the vehicle (the left side in FIG. 1) is the driver side, and the left side of the vehicle (the right side in FIG. 1) is the passenger side. When the vehicle is a left-hand drive vehicle, the left side of the vehicle (the right side in FIG. 1) is the driver's seat side, and the right side of the vehicle (the left side in FIG. 1) is the passenger side. When the vehicle is a left-hand drive vehicle, the configuration of the wiper device 2 is reversed left and right.

  The first motor 11 causes the driver-side wiper arm 17 and the passenger-side wiper arm 35 to reciprocate on the windshield glass 1 by rotating the output shaft forward and backward within a predetermined rotation angle range. It is a driving source. In the present embodiment, when the first motor 11 rotates forward, the driver's seat-side wiper arm 17 operates such that the driver's seat-side wiper blade 18 wipes the upper reversal position P1D from the lower reversal position P2D. The wiper arm 35 operates so that the passenger side wiper blade 36 wipes the upper inversion position P1P from the lower inversion position P2P. When the first motor 11 rotates in the reverse direction, the driver's seat side wiper arm 17 operates such that the driver's seat side wiper blade 18 wipes the lower inversion position P2D from the upper inversion position P1D, and the passenger's seat side wiper arm 35 The passenger side wiper blade 36 operates to wipe the lower inversion position P2P from the upper inversion position P1P.

  The outer edge of the windshield glass 1 is a light-shielding portion 1A coated with a ceramic black pigment to block visible light and ultraviolet light. The black pigment is applied to the outer edge portion of the windshield glass 1 on the vehicle interior side, then melted by being heated at a predetermined temperature, and fixed on the vehicle interior side surface of the windshield glass 1. The windshield glass 1 is fixed to the vehicle body by an adhesive applied to an outer edge portion. As shown in FIG. 1, by providing a light shielding portion 1A that does not transmit ultraviolet light at the outer edge portion, the adhesive by the ultraviolet light is provided. Deterioration is suppressed.

  When the second motor 12 described below does not operate, the output shaft of the first motor 11 (first output shaft 11A described later) is rotated from 0 ° to a predetermined rotation angle (hereinafter, referred to as “first predetermined rotation angle”). By rotating forward and backward at the rotation angles up to, the driver-side wiper blade 18 wipes the wiping range H1 and the passenger-side wiper blade 36 wipes the wiping range Z1.

  The second motor 12 is configured such that the output shaft of the second motor 12 (a second output shaft 12A described later) has a positive rotation angle from 0 ° to a predetermined rotation angle (hereinafter, referred to as a “second predetermined rotation angle”). This is a drive source that causes the front passenger side wiper arm 35 to extend in appearance by rotating and reversely rotating. When the second motor 12 is operated while the first motor 11 is operating, the passenger side wiper arm 35 is apparently extended above the passenger side, and the passenger side wiper blade 36 wipes the wiping range Z2. Further, by changing the magnitude of the second predetermined rotation angle, it is possible to change the range in which the passenger seat side wiper arm 35 extends. For example, when the second predetermined rotation angle is increased, the range in which the front passenger seat side wiper arm 35 extends is increased, and when the second predetermined rotation angle is reduced, the range in which the front passenger seat wiper arm 35 extends is reduced.

  The first motor 11 and the second motor 12 are motors that can control the rotation direction of each output shaft to forward rotation and reverse rotation, and can also control the rotation speed of each output shaft. Either a DC motor or a brushless DC motor.

  A control circuit 52 for controlling the rotation of each of the first motor 11 and the second motor 12 is connected. The control circuit 52 according to the present embodiment includes, for example, an absolute angle sensor (not shown) as a “rotation angle detection unit” provided near the output shaft end of each of the first motor 11 and the second motor 12. The duty ratio of the voltage applied to each of the first motor 11 and the second motor 12 based on the detected rotation direction, rotation position, rotation speed, and rotation angle of each output shaft of the first motor 11 and the second motor 12 Is calculated.

  In the present embodiment, a pulse width that modulates a voltage applied to each of the first motor 11 and the second motor 12 into a pulse-like waveform by turning on and off a voltage of a vehicle-mounted battery (approximately 12 V) by a switching element. Generated by modulation (PWM). In the present embodiment, the duty ratio is a ratio of the time of one pulse generated by turning on the switching element to one cycle of the waveform of the voltage generated by the PWM. One cycle of the voltage waveform generated by the PWM is the sum of the time of the above-mentioned one pulse and the time when the above-mentioned switching element is turned off and no pulse is generated. The drive circuit 56 generates a voltage to be applied to each of the first motor 11 and the second motor 12 by turning on and off a switching element in the drive circuit 56 in accordance with the duty ratio calculated by the control circuit 52, and outputs the generated voltage to the The voltage is applied to the terminals of the windings of the first motor 11 and the second motor 12.

  Since each of the first motor 11 and the second motor 12 according to the present embodiment has a reduction mechanism constituted by a worm gear, the rotation direction, rotation speed, and rotation angle of each output shaft are set to the first The rotation speed and rotation angle of each of the motor 11 main body and the second motor 12 main body are not the same. However, in the present embodiment, since each motor and each reduction mechanism are integrally formed, the rotation speed and the rotation angle of the output shaft of each of the first motor 11 and the second motor 12 will be described below. The rotation direction, rotation speed, and rotation angle of each of the first motor 11 and the second motor 12 are considered.

  The absolute angle sensor is provided in, for example, a speed reduction mechanism of each of the first motor 11 and the second motor 12, and converts a magnetic field (magnetic force) of an exciting coil or a magnet rotating in conjunction with each output shaft into a current. This is a sensor for detecting, for example, a magnetic sensor such as an MR sensor.

  The control circuit 52 determines the position of the driver side wiper blade 18 on the windshield glass 1 from the rotation angle of the output shaft of the first motor 11 detected by the absolute angle sensor provided near the output shaft end of the first motor. A microcomputer 58 capable of calculation is provided. The microcomputer 58 controls the drive circuit 56 so that the rotation speed of the output shaft of the first motor 11 changes according to the calculated position.

  Further, the microcomputer 58 detects the rotation angle of the output shaft of the first motor 11 detected by the absolute angle sensor provided near the end of the output shaft of the first motor so that the wiper blade 36 of the passenger seat side on the windshield glass 1 can rotate. The position is calculated, and the drive circuit 56 is controlled so that the rotation speed of the output shaft of the second motor 12 changes according to the calculated position. Further, the microcomputer 58 calculates the degree of extension of the passenger seat side wiper arm 35 from the rotation angle of the output shaft of the second motor 12 detected by the absolute angle sensor provided near the output shaft end of the second motor 12.

  The control circuit 52 is provided with a memory 60 which is a storage device storing data and programs used for controlling the drive circuit 56. The memory 60 stores the positions of the driver's seat side wiper blade 18 and the passenger's seat side wiper blade 36 on the windshield glass 1 in accordance with the rotation angle of the output shaft of the first motor 11 and the second motor 12. Data and a program for calculating a rotation speed and the like (including a rotation angle) of each output shaft are stored.

  The microcomputer 58 is connected to a vehicle ECU (Electronic Control Unit) 90 that controls the engine and the like of the vehicle. The vehicle ECU 90 includes a wiper switch 50, a direction indicator switch 54, a washer switch 62, a rain sensor 76, a vehicle speed sensor 92 for detecting the speed of the vehicle, a vehicle-mounted camera 94 for photographing the front of the vehicle, a GPS (Global Positioning System). ) The device 96 and the steering angle sensor 98 are connected.

  The wiper switch 50 is a switch for turning on or off the electric power supplied from the battery of the vehicle to the first motor 11. The wiper switch 50 is a low-speed operation mode selection position for operating the driver side wiper blade 18 and the passenger side wiper blade 36 at low speed, a high-speed operation mode selection position for operating at high speed, and an intermittent operation for intermittently operating at a constant cycle. The mode can be switched between a mode selection position, an AUTO (automatic) operation mode selection position, and a storage (stop) mode selection position that are operated when the rain sensor 76 detects raindrops. Further, a signal corresponding to the selected position of each mode is output to the microcomputer 58 via the vehicle ECU 90.

  When a signal output from the wiper switch 50 in accordance with the selected position of each mode is input to the microcomputer 58 via the vehicle ECU 90, the microcomputer 58 sends control corresponding to the output signal from the wiper switch 50 to the memory 60. This is performed using stored data and programs.

  In the present embodiment, the wiper switch 50 is separately provided with an enlarged mode switch for changing the wiping range of the passenger side wiper blade 36 to the wiping range Z2. When the enlargement mode switch is turned on, a predetermined signal is input to the microcomputer 58 via the vehicle ECU 90. When a predetermined signal is input, the microcomputer 58, for example, wipes the wiping range Z2 when the front passenger side wiper blade 36 moves from the lower inversion position P2P to the upper inversion position P1P. Control.

  The direction indicator switch 54 is a switch for instructing the operation of a direction indicator (not shown) of the vehicle. A signal for turning on the right or left direction indicator is operated by the driver to the vehicle ECU 90. Output. The vehicle ECU 90 blinks the lamp of the right or left turn signal based on the signal output from the turn signal switch 54. The signal output from the turn signal switch 54 is also input to the microcomputer 58 via the vehicle ECU 90.

  The washer switch 62 is a switch that turns on or off electric power supplied from the battery of the vehicle to the washer motor 64, the first motor 11, and the second motor 12. The washer switch 62 is provided integrally with operating means such as a lever provided with the above-described wiper switch 50, and is turned on by an operation such as an occupant pulling the lever or the like close to the user. When the washer switch 62 is turned on, the microcomputer 58 operates the washer motor 64 and the first motor 11. When the passenger seat side wiper blade 36 wipes from the lower inversion position P2P to the upper inversion position P1P, the microcomputer 58 moves the passenger side wiper blade 36 from the upper inversion position P1P so as to wipe the wiping range Z2. When wiping to the reversal position P2P, the second motor 12 is controlled to wipe the wiping range Z1. With this control, it is possible to widely wipe the passenger seat side of the windshield glass 1.

  While the washer switch 62 is on, the washer pump 66 is driven by rotation of the washer motor 64 of the washer device 70. The washer pump 66 pumps the washer fluid in the washer fluid tank 68 to the driver seat side hose 72A or the passenger seat side hose 72B. The driver seat side hose 72A is connected to a driver seat side nozzle 74A provided below the windshield glass 1 on the driver seat side. The passenger seat side hose 72B is connected to a passenger seat side nozzle 74B provided below the windshield glass 1 on the passenger seat side. The pressure-washed washer liquid is jetted onto the windshield glass 1 from the driver seat side nozzle 74A and the passenger seat side nozzle 74B. The washer liquid adhering to the windshield glass 1 is wiped together with the dirt on the windshield glass 1 by the operating driver side wiper blade 18 and the passenger side wiper blade 36 which are operating.

  The microcomputer 58 controls the washer motor 64 to operate only while the washer switch 62 is on. Also, the microcomputer 58 operates the first motor 11 so that the driver's seat wiper blade 18 and the passenger's seat wiper blade 36 continue to operate even when the washer switch 62 is turned off until the wiper blades reach the lower reversing positions P2D and P2P. Control. Further, when the washer switch 62 is turned off while the driver's seat side wiper blade 18 and the passenger's seat side wiper blade 36 are wiping toward the upper reversing positions P1D and P1P, the microcomputer 58 outputs the signal to the driver's seat side. The second motor 12 is controlled to wipe the wiping range Z2 until the wiper blade 18 and the passenger side wiper blade 36 reach the upper inversion positions P1D and P1P by the rotation of the first motor 11.

  The rain sensor 76 is, for example, a type of an optical sensor provided on the vehicle interior side of the windshield glass 1 and detects water droplets and the like on the surface of the windshield glass 1. The rain sensor 76 includes, for example, an LED that is an infrared light emitting element, a photodiode that is a light receiving element, a lens that forms an infrared light path, and a control circuit. The infrared rays emitted from the cabin side to the outside of the vehicle by the LED are totally reflected by the windshield glass 1. However, if waterdrops exist on the surface of the windshield glass 1, a part of the infrared rays penetrates the waterdrops and is emitted to the outside. , The amount of reflection at the windshield glass 1 is reduced. As a result, the amount of light entering the photodiode as the light receiving element decreases. Based on the decrease in the light amount, a water droplet on the surface of the windshield glass 1 is detected.

  The vehicle speed sensor 92 is a sensor that detects the number of rotations of the wheels of the vehicle and outputs a signal indicating the number of rotations. The vehicle ECU 90 calculates the vehicle speed from the signal output by the vehicle speed sensor 92 and the circumference of the wheel.

  The in-vehicle camera 94 is a device that photographs the front of the vehicle and acquires data of a moving image. The vehicle ECU 90 can determine, for example, that the vehicle is approaching a curve by performing image processing on the data of the moving image acquired by the vehicle-mounted camera 94. Further, the vehicle ECU 90 can calculate the brightness in front of the vehicle from the brightness of the data of the moving image acquired by the on-board camera 94.

  The rain sensor 76 and the on-vehicle camera 94 are provided on the vehicle interior side of the windshield glass 1. The rain sensor 76 detects raindrops and the like on the windshield glass 1 from the passenger compartment side through the windshield glass 1, and the in-vehicle camera 94 photographs the front of the vehicle through the windshield glass 1.

  The GPS device is a device that calculates the current position of the vehicle based on a signal for positioning received from a GPS satellite in the sky. In the present embodiment, the GPS device 96 dedicated to the wiper system 100 is used. However, when the vehicle includes another GPS device such as a car navigation system, the other GPS device may be used.

  The steering angle sensor 98 is, for example, a sensor that is provided on a rotation shaft (not shown) of the steering and detects the rotation angle of the steering.

  Hereinafter, the configuration of the wiper device 2 according to the present embodiment will be described with reference to FIGS. As shown in FIGS. 2 and 4 to 8, the wiper device 2 according to the present embodiment has a plate-shaped central frame 3, one end of which is fixed to the central frame 3, and both sides of the central frame 3 in the vehicle width direction. And a pair of pipe frames 4 and 5 which are extended. At the other end of the pipe frame 4, a first holder member 6 provided with a driver side pivot shaft 15 of the driver side wiper arm 17 and the like are formed. The other end of the pipe frame 5 is formed with a second holder member 7 provided with the second passenger seat side pivot shaft 22 of the passenger seat side wiper arm 35 and the like. The wiper device 2 is supported on the vehicle by a support portion 3A provided on the central frame 3, and each of the fixing portion 6A of the first holder member 6 and the fixing portion 7A of the second holder member 7 is fixed to the vehicle by bolts or the like. By being fastened, it is fixed to the vehicle.

  The wiper device 2 includes a first motor 11 and a second motor 12 for driving the wiper device 2 on the back surface (the surface facing the passenger compartment side) of the center frame 3. A first output shaft 11A of the first motor 11 penetrates through the center frame 3 and protrudes to the surface of the center frame 3 (a surface on the outside of the vehicle). One end of 13 is fixed. A second output shaft 12A of the second motor 12 penetrates through the center frame 3 and protrudes from the surface of the center frame 3, and one end of a second drive crank arm 14 is fixed to a tip end of the second output shaft 12A. .

  A driver-side pivot shaft 15 is rotatably supported by the first holder member 6, and one end of a driver-side swing lever 16 is provided at a base end of the driver-side pivot shaft 15 (a back side in FIG. 2). The arm head of the driver's seat side wiper arm 17 is fixed to the distal end (front side in FIG. 2) of the driver's seat side pivot shaft 15. As shown in FIG. 1, a driver's seat side wiper blade 18 for wiping the driver's seat side of the windshield glass 1 is connected to a distal end portion of the driver's seat side wiper arm 17.

  The other end of the first drive crank arm 13 and the other end of the driver side swing lever 16 are connected via a first connection rod 19. When the first motor 11 is driven, the first drive crank arm 13 rotates, and its rotational force is transmitted to the driver's seat side swing lever 16 via the first connecting rod 19, and the driver's seat side swing lever 16 Rocks. When the driver side swing lever 16 is swung, the driver side wiper arm 17 also swings, and the driver side wiper blade 18 wipes the wiping range H1 between the lower inversion position P2D and the upper inversion position P1D.

  FIG. 3 is a sectional view of the second holder member 7 along the line AA in FIG. As shown in FIG. 3, the first passenger seat-side pivot shaft 21 is rotatably supported about the first axis L <b> 1, and the second passenger seat-side pivot shaft 22 is supported by the second holder member 7. It is supported rotatably about the axis L2. In the present embodiment, the first axis L1 and the second axis L2 are arranged on the same straight line L (concentric). FIG. 3 shows a state in which the waterproof cover K shown in FIGS. 2 and 4 to 8 is removed.

  A cylindrical portion 7B is formed in the second holder member 7, and a first passenger seat-side pivot shaft 21 is rotatably supported on the inner peripheral side of the cylindrical portion 7B via a bearing 23. The first passenger seat-side pivot shaft 21 is formed in a cylindrical shape, and a second passenger seat-side pivot shaft 22 is rotatably supported on the inner peripheral side of the first passenger seat-side pivot shaft 21 via a bearing 24. .

  One end of a first passenger seat side pivot lever 25 is fixed to a base end of the first passenger seat side pivot shaft 21, and a first drive lever 26 is attached to a tip end of the first passenger seat side pivot shaft 21. One end is fixed. As shown in FIG. 2, the other end of the first passenger seat side swing lever 25 and the other end of the driver seat side swing lever 16 are connected by a second connecting rod 27. Therefore, when the first motor 11 is driven and the driver's seat side swing lever 16 swings, the second connecting rod 27 transmits the driving force to the first passenger seat side swing lever 25, and the first passenger seat side swing lever 25 Together with 25, the first drive lever 26 swings (rotates) around the first axis L1.

  As shown in FIG. 3, the second passenger-seat-side pivot shaft 22 is formed to be longer than the first passenger-seat-side pivot shaft 21, and the base end and the distal end of the second passenger-seat-side pivot shaft 22 are the first. One end of a second passenger seat side swing lever 28 is fixed to the base end of the second passenger seat side pivot shaft so as to protrude axially from the passenger seat side pivot shaft 21. One end of a second drive lever 29 is fixed to the distal end.

  The other end of the second drive crank arm 14 and the other end of the second passenger seat side swing lever 28 are connected by a third connecting rod 31. Accordingly, when the second motor 12 is driven, the second drive crank arm 14 rotates, and the third connecting rod 31 transmits the driving force of the second drive crank arm 14 to the second passenger seat side swing lever 28. The second drive lever 29 is swung (rotated) together with the second passenger seat side swing lever 28. As described above, the first passenger seat-side pivot shaft 21 and the second passenger seat-side pivot shaft 22 are provided coaxially, but the first passenger seat-side pivot shaft 21 and the second passenger seat-side pivot shaft 22 are mutually separated. The first passenger seat-side pivot shaft 21 and the second passenger seat-side pivot shaft 22 rotate independently of each other.

  As shown in FIGS. 2 and 4 to 8, the wiper device 2 includes a first driven lever having a base end portion rotatably connected around a third axis L <b> 3 at the other end of the first drive lever 26. 32.

  The wiper device 2 has a base end connected rotatably about a fourth axis L4 on the distal end side of the first driven lever 32 and a fifth axis L5 on the other end side of the second drive lever 29. An arm head 33 is provided as a second driven lever rotatably connected to the distal end side as a center. The arm head 33 forms a passenger seat side wiper arm 35 together with a retainer 34 whose base end is fixed to the distal end of the arm head 33. A front-seat-side wiper blade 36 for wiping the front-seat side of the windshield glass 1 is connected to a distal end portion of the front-seat-side wiper arm 35.

  The first drive lever 26, the second drive lever 29, the first driven lever 32, and the arm head 33 have a length from the first axis L1 (second axis L2) to the third axis L3, and a length from the fourth axis L4 to the fifth axis L4. They are connected so that the length up to the axis L5 is the same. The first drive lever 26, the second drive lever 29, the first driven lever 32, and the arm head 33 have a length from the third axis L3 to the fourth axis L4 and a length from the first axis L1 (the second axis L2) to the fifth axis. They are connected so that the length up to the axis L5 is the same. Therefore, the first drive lever 26 and the arm head 33 hold parallel, and the second drive lever 29 and the first driven lever 32 hold parallel, so that the first drive lever 26 and the second drive lever 29, the first driven lever 32 and the arm head 33 constitute a substantially parallelogram link mechanism. Such a substantially parallelogram-shaped link mechanism functions as a telescopic mechanism that expands and contracts by the rotation of the second motor 12.

  The fifth axis L5 is a fulcrum when the passenger seat side wiper arm 35 operates, and the passenger seat side wiper arm 35 is rotated about the fifth axis L5 by the driving force of the first motor 11, so that the windshield glass is rotated. 1 reciprocate. Further, the second motor 12 moves the fifth axis L5 through a substantially parallelogram link mechanism including the first drive lever 26, the second drive lever 29, the first driven lever 32, and the arm head 33. As shown in FIGS. 4 to 6, the windshield glass 1 is moved above the windshield glass 1 as compared with the cases of FIGS. 2, 7 and 8. By the movement of the fifth axis L5, the passenger side wiper arm 35 is apparently extended. Therefore, when the second motor 12 operates together with the first motor 11, the passenger side wiper blade 36 wipes the wiping range Z2.

  When only the first motor 11 operates without operating the second motor 12, the fifth axis L5 moves from the position shown in FIGS. 2, 7, and 8 (hereinafter, referred to as a "first position"). Does not move. Therefore, the passenger side wiper arm 35 operates between the lower inversion position P2P and the upper inversion position P1P while drawing a substantially arc-shaped trajectory around the fifth axis L5 whose position does not change. The substantially fan-shaped wiping range Z1 is wiped.

  In the present embodiment, when it is necessary to wipe the windshield glass 1 widely, the wiping range Z2 is wiped when the front passenger seat side wiper blade 36 moves from the lower inversion position P2P to the upper inversion position P1P. The first motor 11 and the second motor 12 are controlled as described above. The first motor 11 and the second motor 12 are respectively controlled so as to wipe the wiping range Z1 when the passenger seat side wiper blade 36 inverted at the upper inversion position P1P moves toward the lower inversion position P2P. . When the front passenger side wiper blade 36 reciprocates between the lower reversing position P2P and the upper reversing position P1P, the windshield glass is wiped by wiping the wiping range Z2 at the time of forward movement and the wiping range Z1 at the time of returning movement. 1 Wide range can be wiped out. Alternatively, when the passenger side wiper blade 36 reciprocates between the lower inversion position P2P and the upper inversion position P1P, the wiping range Z1 is wiped in the forward movement, and the wiping range Z2 is wiped in the returning movement. A wide range of the windshield glass 1 can be wiped. Alternatively, the wiping range Z2 may be wiped during the forward movement and the backward movement.

  Hereinafter, the operation of the wiper device 2 according to the present embodiment will be described. In the present embodiment, the driver's seat side wiper arm 17 and the driver's seat side wiper blade 18 only operate around the driver's seat side pivot shaft 15 according to the rotation of the first motor 11. The operation of the passenger seat side wiper blade 36 will be described in detail. Further, the following description of the operation of the wiper device 2 describes a case where the enlarged wiping is performed during the forward movement.

  FIG. 2 shows a state in which the passenger seat side wiper blade 36 is located at the lower reversing position P2P, and a state where the passenger seat side wiper arm 35 is at the stop position. In this state, when the washer switch 62 or the enlargement mode switch is turned on, the first output shaft 11A of the first motor 11 rotates in the rotation direction CC1 shown in FIG. The one drive lever 26 starts rotating, and the passenger side wiper arm 35 starts rotating around the fifth axis L5. At the same time, the second output shaft 12A of the second motor 12 also starts rotating in the rotation direction CC2 shown in FIG. In the present embodiment, the rotation of the first output shaft 11A in the rotation direction CC1 and the rotation of the second output shaft 12A in the rotation direction CC2 are defined as positive rotations of the respective output shafts.

  FIG. 4 shows a state in which the windshield blade 36 wipes the windshield glass 1 halfway (approximately ４ of the forward stroke). In the present embodiment, when the first motor 11 starts rotating in the rotation direction CC1, the driving force due to the rotation of the second motor 12 in the rotation direction CC2 is transmitted to the second drive lever 29. The second drive lever 29 to which the driving force of the second motor 12 has been transmitted operates in the operating direction CW3, and moves the fifth axis L5, which is the fulcrum of the wiper arm 35 on the passenger seat side, above the windshield glass 1 on the passenger seat side. Move toward

  FIG. 5 shows that the first drive lever 26 is further rotated by rotating the first output shaft 11A to an intermediate rotation angle between 0 ° and the first predetermined rotation angle, and the passenger side wiper blade 36 is turned downward. This figure shows a case where a substantially intermediate point of a stroke (forward stroke) between the position P2P and the upper reversal position P1P is reached. In FIG. 5, the second output shaft 12A of the second motor 12 is also rotated to the second predetermined rotation angle in the rotation direction CC2 shown in FIG. Due to the maximum rotation angle of the second output shaft 12A in the forward rotation, the fifth axis L5, which is the fulcrum of the wiper arm 35 on the passenger seat side, moves to the second drive crank arm 14, the third connecting rod 31, The passenger's seat side swinging lever 28 and the second drive lever 29 lift the uppermost position (second position). As a result, as shown in FIG. 1, the tip of the front passenger seat wiper blade 36 is moved to a position near the upper corner of the windshield glass 1 on the front passenger seat side. The above-described intermediate rotation angle is about half of the first predetermined rotation angle, but is set individually according to the shape of the windshield glass 1 and the like. The second position is a position where the fifth axis L5 is located at the uppermost position in the enlarged wiping operation. More specifically, when the front passenger seat side wiper blade wipes a range wider than the wiping range Z1 (for example, the wiping range Z2), the first position of the first output shaft 11A is between 0 ° and the first predetermined rotation angle. This is the position where the fifth axis L5 at the time of rotation to the intermediate rotation angle is arranged.

  FIG. 6 shows that the passenger-side wiper blade 36 reaches approximately 3/4 of the stroke (forward stroke) between the lower reversing position P2P and the upper reversing position P1P due to the further rotation of the first drive lever 26. It shows the case where it is done. 6, the rotation direction of the first output shaft 11A of the first motor 11 is the same as in FIGS. 4 and 5, but the second output shaft 12A of the second motor 12 is in the opposite direction to that in FIGS. It rotates in the rotation direction CW2 (reverse rotation). When the second output shaft 12A rotates in the rotation direction CW2, the second drive lever 29 operates in the operation direction CC3, and the fifth axis L5, which is the fulcrum of the passenger side wiper arm 35, is moved downward from the second position. You. As a result, the front passenger seat-side wiper blade 36 moves on the windshield glass 1 while tracing the locus indicated by the broken line above the wiping range Z2 shown in FIG. 1 to wipe the wiping range Z2.

  FIG. 7 shows a case where the first output shaft 11A of the first motor 11 rotates forward to a first predetermined rotation angle and the second output shaft 12A of the second motor 12 rotates reversely at a second predetermined rotation angle. I have. Since the rotation angle of the first output shaft 11A of the first motor 11 in the forward rotation is maximized, the driver's seat side wiper arm 17 and the driver's seat side wiper blade 18 reach the upper reversing position P1D. Further, the second output shaft 12A of the second motor 12 is reversed at the second predetermined rotation angle from the state shown in FIG. 5 (the state where the second output shaft 12A has reached the second predetermined rotation angle by the forward rotation). Due to the rotation, the fifth axis L5, which is the fulcrum of the passenger side wiper arm 35, moves to the first position, which is the position before the second output shaft 12A of the second motor 12 shown in FIG. I'm back. As a result, the passenger's seat side wiper arm 35 and the passenger's seat side wiper blade 36 reach the same upper reversal position P1P as the wiping range Z1 when the second motor 12 is not driven.

  FIG. 8 shows the driver's seat-side wiper arm 17 and the driver's seat-side wiper blade 18 and the passenger's seat-side wiper arm 35 and the passenger's seat-side wiper blade 36 moving backward from the upper inversion positions P1D and P1P to the lower inversion positions P2D and P2P. The state (return stroke) is shown. At the time of the reverse movement, the first output shaft 11A of the first motor 11 rotates in the reverse direction, and rotates in the rotation direction CW1 in the direction opposite to that in FIGS. However, the second output shaft 12A of the second motor 12 does not rotate, and therefore the fifth axis L5, which is the fulcrum of the passenger seat side wiper arm 35, does not move from the first position. Is rotated in the reverse direction, so that the passenger side wiper arm 35 draws a substantially arc-shaped trajectory. As a result, the passenger side wiper blade 36 connected to the tip of the passenger side wiper arm 35 wipes the wiping range Z1.

  As above, the operation of the wiper device 2 when performing the enlarged wiping in the forward movement has been described. When performing the enlarged wiping at the time of the backward movement, as shown in FIG. 8, the first output shaft 11A of the first motor 11 is rotated in the rotation direction CW1, and the second output shaft 12A of the second motor 12 is drawn. By starting rotation in the rotation direction CC2 shown in FIG. 4, the extension of the passenger seat side wiper arm 35 is started. Then, as shown in FIG. 5, when the first output shaft 11A rotates to an intermediate rotation angle between 0 ° and the first predetermined rotation angle, the second output shaft 12A rotates to the second predetermined rotation angle. Then, the passenger side wiper arm 35 is extended to the maximum. Thereafter, the second output shaft 12A is rotated in the rotation direction CW2 shown in FIG. 6, and the extended passenger seat side wiper arm 35 is converged.

  FIG. 9 is a circuit diagram schematically showing a circuit of wiper system 100 according to the present embodiment. As shown in FIG. 9, the wiper system 100 includes a control circuit 52 and a drive circuit 56.

  The control circuit 52 has the microcomputer 58 and the memory 60 as described above. The microcomputer 58 has a wiper switch 50, a direction indicator switch 54, a washer switch 62, and a vehicle ECU 90 (not shown). A rain sensor 76, a vehicle speed sensor 92, a vehicle-mounted camera 94, a GPS device 96, and a steering angle sensor 98 are connected to each other.

  The drive circuit 56 includes a first pre-driver 104 and a first motor drive circuit 108 for driving the first motor 11, and a second pre-driver 106 and a second motor drive circuit 110 for driving the second motor 12. ing. The drive circuit 56 has a relay drive circuit 78, an FET drive circuit 80, and a washer motor drive circuit 57 for driving the washer motor 64.

  The microcomputer 58 of the control circuit 52 turns on / off a switching element included in the first motor drive circuit 108 via the first pre-driver 104 to rotate the first motor 11 via the second pre-driver 106. By turning on and off the switching elements of the two-motor drive circuit 110, the rotation of the second motor 12 is controlled respectively. Further, the microcomputer 58 controls the rotation of the washer motor 64 by controlling the relay drive circuit 78 and the FET drive circuit 80.

  When the first motor 11 and the second motor 12 are DC motors with brushes, the first motor drive circuit 108 and the second motor drive circuit 110 each include four switching elements. The switching element is, for example, an N-type FET (field effect transistor).

  As shown in FIG. 9, the first motor drive circuit 108 includes FETs 108A to 108D. The FET 108A has a drain connected to the power supply (+ B), a gate connected to the first pre-driver 104, and a source connected to one end of the first motor 11. The FET 108B has a drain connected to the power supply (+ B), a gate connected to the first pre-driver 104, and a source connected to the other end of the first motor 11. The FET 108C has a drain connected to one end of the first motor 11, a gate connected to the first pre-driver 104, and a source grounded. The FET 108D has a drain connected to the other end of the first motor 11, a gate connected to the first pre-driver 104, and a source grounded.

  The first pre-driver 104 controls the driving of the first motor 11 by switching control signals supplied to the gates of the FETs 108A to 108D according to a control signal from the microcomputer 58. That is, when rotating the first output shaft 11A of the first motor 11 in a predetermined direction (forward rotation), the first pre-driver 104 turns on the pair of the FETs 108A and 108D, and the first output of the first motor 11 When rotating the shaft 11A in the direction opposite to the predetermined direction (reverse rotation), the set of the FET 108B and the FET 108C is turned on. In addition, the first pre-driver 104 performs PWM for intermittently turning on and off the FETs 108A and 108D based on a control signal from the microcomputer 58.

  The first pre-driver 104 controls the rotation speed of the first motor 11 in the forward rotation by changing the duty ratio related to ON / OFF of the FET 108A and the FET 108D by PWM. When the duty ratio increases, the effective value of the voltage applied to the terminal of the first motor 11 during forward rotation increases, and the rotation speed of the first motor 11 increases.

  Similarly, the first pre-driver 104 controls the rotation speed of the first motor 11 in the reverse rotation by changing the duty ratio related to ON / OFF of the FET 108B and the FET 108C by PWM. When the duty ratio increases, the effective value of the voltage applied to the terminal of the first motor 11 during the reverse rotation increases, and the rotation speed of the first motor 11 increases.

  The second motor drive circuit 110 includes FETs 110A to 110D. The FET 110 </ b> A has a drain connected to the power supply (+ B), a gate connected to the second pre-driver 106, and a source connected to one end of the second motor 12. The FET 110B has a drain connected to the power supply (+ B), a gate connected to the second pre-driver 106, and a source connected to the other end of the second motor 12. The FET 110C has a drain connected to one end of the second motor 12, a gate connected to the second pre-driver 106, and a source grounded. The FET 110D has a drain connected to the other end of the second motor 12, a gate connected to the second pre-driver 106, and a source grounded.

  The second pre-driver 106 controls driving of the second motor 12 by switching control signals supplied to the gates of the FETs 110A to 110D according to a control signal from the microcomputer 58. That is, when rotating the second output shaft 12A of the second motor 12 in a predetermined direction (forward rotation), the second pre-driver 106 turns on the set of the FET 110A and the FET 110D, and the second output of the second motor 12 When rotating the shaft 12A in the direction opposite to the predetermined direction (reverse rotation), the set of the FET 110B and the FET 110C is turned on. Further, the second pre-driver 104 controls the rotation speed of the second motor 12 by performing PWM like the above-described first pre-driver 104 based on a control signal from the microcomputer 58.

  A two-pole sensor magnet 112A is fixed to the output shaft end 112 of the first output shaft 11A in the speed reduction mechanism of the first motor 11, and serves as a "first rotation angle detector" so as to face the sensor magnet 112A. The first absolute angle sensor 114 is provided.

  A two-pole sensor magnet 116A is fixed to the output shaft end 116 of the second output shaft 12A in the speed reduction mechanism of the second motor 12, and serves as a "second rotation angle detector" so as to face the sensor magnet 116A. The second absolute angle sensor 118 is provided.

  The first absolute angle sensor 114 detects the magnetic field of the sensor magnet 112A, and the second absolute angle sensor 118 detects the magnetic field of the sensor magnet 116A, and outputs a signal corresponding to the strength of the detected magnetic field. The microcomputer 58 determines a rotation angle and a rotation position of each of the first output shaft 11A of the first motor 11 and the second motor 12 based on signals output from the first absolute angle sensor 114 and the second absolute angle sensor 118, respectively. , The rotation direction and the rotation speed are calculated.

  From the rotation angle of the first output shaft 11A of the first motor 11, the position between the lower inversion position P2D and the upper inversion position P1D of the driver's seat side wiper blade 18 can be calculated. In addition, from the rotation angle of the second output shaft 12A of the second motor 12, the degree of apparent extension (degree of enlargement) of the passenger seat side wiper arm 35 can be calculated. The microcomputer 58 calculates the rotation angle of the second output shaft 12A based on the position between the lower inversion position P2D and the upper inversion position P1D of the driver's seat side wiper blade 18 calculated from the rotation angle of the first output shaft 11A. , The operations of the first motor 11 and the second motor 12 are synchronized. As an example, the memory 60 stores the position (or the rotation angle of the first output shaft 11A) between the lower inversion position P2D and the upper inversion position P1D of the driver's seat side wiper blade 18 and the rotation angle of the second output shaft 12A. (For example, a second output shaft rotation angle map, which will be described later), and controls the rotation angle of the second output shaft 12A according to the rotation angle of the first output shaft 11A according to the map.

  The washer motor drive circuit 57 includes a relay unit 84 including two relays RLY1 and RLY2, and two FETs 86A and 86B. The relay coils of the relays RLY1 and RLY2 of the relay unit 84 are connected to the relay drive circuit 78, respectively. The relay drive circuit 78 switches ON / OFF (excitation / excitation of the relay coil) of the relays RLY1 and RLY2. While the relay coil is not excited, the relays RLY1 and RLY2 maintain the state (off state) in which the common terminals 84C1 and 84C2 are connected to the first terminals 84A1 and 84A2, respectively, and when the relay coil is excited. The state is switched to a state in which the common terminals 84C1 and 84C2 are connected to the second terminals 84B1 and 84B2, respectively. The common terminal 84C1 of the relay RLY1 is connected to one end of the washer motor 64, and the common terminal 84C2 of the relay RLY2 is connected to the other end of the washer motor 64. Each of the first terminals 84A1 and 84A2 of the relays RLY1 and RLY2 is connected to the drain of the FET 86B, and each of the second terminals 84B1 and 84B2 of the relays RLY1 and RLY2 is connected to the power supply (+ B).

  The FET 86B has a gate connected to the FET drive circuit 80 and a source grounded. The duty ratio related to ON / OFF of the FET 86B is controlled by the FET drive circuit 80. An FET 86A is provided between the drain of the FET 86B and the power supply (+ B). Since the control signal is not input to the gate, the FET 86A is not switched on and off, and is provided for the purpose of using a parasitic diode for absorbing surge.

  The relay drive circuit 78 and the FET drive circuit 80 control the driving of the washer motor 64 by switching on and off the two relays RLY1 and RLY2 and the FET 86B. That is, when rotating the output shaft of the washer motor 64 in a predetermined direction (forward rotation), the relay drive circuit 78 turns on the relay RLY1 (relay RLY2 is off), and the FET drive circuit 80 turns on the FET 86B at a predetermined duty ratio. Let it. With the above control, the rotation speed of the output shaft of the washer motor 64 is controlled.

FIG. 10 shows an example of a second output shaft rotation angle map that defines the rotation angle of the second output shaft 12A according to the rotation angle of the first output shaft 11A in the present embodiment. A curve 190 in FIG. 10 is used when the enlargement ratio indicating the extent of the wiping is 100%, and a curve 192 is used when the enlargement ratio is 50%. The horizontal axis of FIG. 10 is a first output shaft rotation angle theta _A is the rotational angle of the first output shaft 11A, the vertical axis is the second output shaft rotation angle theta _B is the rotational angle of the second output shaft 12A . The origin O in FIG. 10 indicates a state where the passenger side wiper blade 36 is at the lower turning position P2P. Theta ₁ of FIG. 10, the result of the first output shaft 11A has first predetermined rotation angle theta ₁ rotation, passenger side wiper blade 36 indicates a state in which the upper reversal position P1P. The curves 190 and 192 shown in FIG. 10 indicate that the first output shaft rotation angle θ _A has reached the first predetermined rotation angle θ ₁ , that is, the front passenger seat side wiper blade 36 has reached the upper inversion position P1P. the second output shaft rotational angle theta _B in the case of shows large angle theta ₃ than 0 °. Incidentally, the second output shaft rotational angle theta _B when passenger side wiper blade 36 has reached the upper turning position P1P may be 0 °.

When the first absolute angle sensor 114 starts rotating the first output shaft 11A of the first motor 11, the microcomputer 58 determines that the rotation angle of the first output shaft 11A detected by the first absolute angle sensor 114 is equal to the second output shaft. Check with the rotation angle map. Such collation, from the angle indicated by the curve 190 in FIG. 10, calculates a second output shaft rotational angle theta _B corresponding to the first output shaft rotation angle theta _A detected by the first absolute angle sensor 114, and calculates so that the second output shaft rotation angle theta _B controls the rotation angle of the second output shaft 12A of the second motor 12.

More specifically, the microcomputer 58 detects the case where the rotation angle of the first output shaft 11A of the first motor 11 starts changing from 0 ° in the forward rotation direction by the first absolute angle sensor 114. It is determined that the blade 36 has started moving from the lower inversion position P2P, and the forward rotation of the second output shaft 12A is started. The microcomputer 58 determines the rotation angle of the second output shaft 12A corresponding to the rotation angle of the first output shaft 11A using the second output shaft rotation angle map, as described above. (2) The rotation angle of the second output shaft (12A) is monitored based on the signal from the absolute angle sensor (118), and the rotation of the second motor (12) is controlled to the rotation angle determined using the second output shaft rotation angle map. . According to the setting of the second output shaft rotation angle map, as shown in FIG. 10, when the curve 190 is used, the first output shaft rotation angle θ _A is between 0 ° and the first predetermined rotation angle θ ₁ . if it becomes the intermediate rotation angle theta _m, angle of rotation of the positive rotation of the second output shaft 12A is set to be a second predetermined rotational angle theta _2. When the rotation angle of the second output shaft 12A in the forward rotation becomes the second predetermined rotation angle θ ₂ , the fifth axis L5 which is the fulcrum of the wiper arm 35 on the passenger seat side is moved upward (on the front passenger seat side on the windshield glass 1). (2nd position). Further, when the curve 192 is used, when the first output shaft rotation angle θ _A becomes an intermediate rotation angle θ _m between 0 ° and the first predetermined rotation angle θ ₁ , the second output shaft 12A the rotation angle of the rotary is made to be a small angle theta ₄ than the second predetermined rotational angle theta _2. When the rotation angle of the second output shaft 12A in the forward rotation becomes the angle θ ₄ , the fifth axis L5, which is the fulcrum of the wiper arm 35 on the passenger seat side, is moved above the windshield glass 1 toward the passenger seat side (using the curve 190). (The position before the second position).

After the rotation angle in the forward rotation of the second output shaft 12A reaches a second predetermined rotational angle theta _2, in accordance with the second output shaft rotation angle map, it reduces the rotation angle of the second output shaft 12A. When the curve 190 is used, the second output shaft 12A is rotated until the rotation angle of the first output shaft 11A reaches the first predetermined rotation angle θ ₁ and the front passenger side wiper blade 36 reaches the upper turning position P1P. by reverse rotation and reducing the rotational angle of the second output shaft 12A through an angle theta _3. Due to the reverse rotation of the second output shaft 12A, the fifth axis L5, which is the fulcrum of the passenger side wiper arm 35, is moved below the second position (the second output shaft rotation angle θ _B at the upper inversion position P1P is reduced). When set to 0 °, the fifth axis L5 is returned to the original position (first position). When the curve 192 is used, the second output shaft 12A is rotated until the rotation angle of the first output shaft 11A reaches the first predetermined rotation angle θ ₁ and the passenger side wiper blade 36 reaches the upper reversing position P1P. by reverse rotation and reducing the rotational angle of the second output shaft 12A through an angle theta _3.

The reverse rotation of such second output shaft 12A, the fifth axis L5 is a fulcrum of the passenger's side wiper arm 35 is in the fifth position in the axial L5 are moved from downward (upper reversal position P1P when the rotation angle theta ₄ When the second rotation angle is set to 0 °, the fifth axis L5 is returned to the original position (first position).

The above description is for the forward movement in which the passenger side wiper blade 36 is moved from the lower inversion position P2P to the upper inversion position P1P. In the case of performing the enlarged wiping operation while moving the passenger side wiper blade 36 from the upper inversion position P1P to the lower inversion position P2P, the rotation angle of the first output shaft 11A is set to the first predetermined rotation angle θ by the first absolute angle sensor 114. _{When the} change starts from _{1 in the} reverse rotation direction, it is determined that the passenger side wiper blade 36 has started moving from the upper reversing position P1P, and the forward rotation of the second output shaft 12A of the second motor 12 is started. .

  FIG. 11A is an explanatory diagram showing a case where the passenger seat-side wiper blade 36 is stopped at the time of forward movement due to a snow puddle and then reversed and moved backward at the stop position. FIG. 11A shows a case in which the wiping operation is performed at the enlargement ratio of 50% using the curve 192 during the forward movement, and the wiping operation is performed at the enlargement ratio of 100% using the curve 190 during the backward movement. Therefore, at the time of the return movement after the reversal, the enlargement and wiping is performed using the curve 190 at an enlargement ratio of 100%.

In this embodiment, the angle theta ₂₀ is a second output shaft rotational angle theta _B point 202A on curve 192 which corresponds to the stop position, the angle theta ₁₀ is a first output shaft rotation angle theta _A stop position calculating a second output shaft rotational angle theta _B is a theta _'20 of the point 204 on the corresponding curve 190, the correction value X based on [Delta] [theta] ₂₀ which is the difference. Then, the correction value X, the angle theta ₂₀ is a second output shaft rotational angle theta _B stop position, the deviation between the second output shaft rotational angle theta _B on the second output shaft rotation angle map for use after inversion gradually so as to eliminate, the angle theta ₂₀ to gradually approach to the second output shaft rotational angle theta _B on the second output shaft rotation angle map for use after inversion.

FIG. 11B is an explanatory diagram showing one mode of the correction value X. In the present embodiment, the correction section β is defined as a range of the first output shaft rotation angle θ _B that gradually approaches the second output shaft rotation angle θ _B on the curve 190 used after inversion of the angle θ ₂₀ on the curve 192. Set. Range of the first output shaft rotation angle theta _A in correction interval beta (difference) is a fixed value in principle, so that reversing the wiping operation from the stop position is performed smoothly, determined through experimentation or the like. More specifically, in FIG. 11, the correction section β corresponds to an angle at which the second output shaft rotation angle θ _B when the curve 190 is used is maximized from the first output shaft rotation angle θ ₁₀ corresponding to the point 202A. there is a first output shaft rotation angle θ section up _a. In the present embodiment, by setting the correction section β, the enlargement ratio indicated by the curve 192 until the passenger seat side wiper blade 36 after the reversal reaches the intermediate point between the upper reversal position P1P and the lower reversal position P2P. To the magnification shown by curve 190.

As shown in FIG. 11 (B), the correction value X is, in the correction period beta, linearly increases monotonically from the minimum value 0 to the maximum value in response to the first output shaft rotation angle theta _A. The maximum value of the correction value X is determined according to the [Delta] [theta] _20, the rate of change with respect to the first output shaft rotation angle theta _A (slope) is determined by the correction interval beta.

11 In (A), when has been controlling the first output shaft rotation angle theta _A and the second output shaft rotational angle theta _B in the direction of arrow 200 with a curve 192, the passenger seat in reservoir snow side wiper blade 36 Is stopped, the second output shaft rotation angle θ _B indicated by the point 202A gradually approaches the second output shaft rotation angle θ _B indicated by the curve 190, and the second output shaft rotation angle θ _B indicated by the curve 190 at the end of the correction section β. to coincide with the second output shaft rotation angle theta _B. That is, the transition operation 240 is performed from the point 202A to the point 202B on the curve 190.

A second output axis rotation angle theta _B showing the point 202A gradually closer to the second output shaft rotational angle theta _B indicated by the curve 190, using equation (1) below. In the equation (1), X (θ _A ) is a correction value X that changes according to the first output shaft rotation angle θ _A in the correction section β, and f (θ _A ) is the correction value X in the correction section β. second output shaft on the curve 190 corresponding to one output shaft rotation angle theta _a is the rotational angle theta _B. Θ _GB is the second output shaft asymptotic rotation angle θ _GB gradually approaching the second output shaft rotation angle θ _B indicated by the curve 190 within the correction section β.
θ _GB = f (θ _A ) −X (θ _A ) (1)

Correction value X as described above, but monotonously increases from 0 to the maximum value in response to the first output shaft rotation angle theta _A, FIG. 11 (A), the case of (B), since the inverted from point 202A, first output shaft rotation angle theta _A in correction interval β monotonously decreases. Therefore, in the case of FIGS. 11A and 11B, X (θ _A ) monotonically decreases in accordance with the first output shaft rotation angle θ _A that changes in the direction of arrow 206 in FIG. It becomes 0 which is the minimum value at the end of the section β.

As a result, the second output shaft asymptotic rotation angle θ _GB calculated by the equation (1) gradually approaches the second output shaft rotation angle θ _B (f (θ _A )) indicated by the curve 190, and the end of the correction section β. And the second output shaft rotation angle θ _B (f (θ _A )) indicated by the curve 190.

  FIG. 12A is an explanatory diagram showing a case where the passenger seat-side wiper blade 36 is stopped at the time of returning movement due to a snow puddle, and then is reversed and moved forward at the stop position. FIG. 12 (A) shows a case where the wiping operation is performed at the enlargement rate of 100% using the curve 190 at the time of the backward movement, and is performed at the enlargement rate of 50% using the curve 192 at the time of the forward movement. Therefore, at the time of the return movement after the reversal, the enlargement and wiping is performed using the curve 192 at an enlargement ratio of 50%.

In the present embodiment, the angle θ ₄₀ which is the second output shaft rotation angle θ _B of the point 210A on the curve 190 corresponding to the stop position and the angle θ ₃₀ which is the first output shaft rotation angle θ _A of the stop position are shown. A correction value X is calculated based on Δθ ₄₀ which is the difference between θ ′ ₄₀ which is the second output shaft rotation angle θ _B of the point 212 on the corresponding curve 192. Then, the correction value X, the angle theta ₄₀ is a second output shaft rotational angle theta _B stop position, the deviation between the second output shaft rotational angle theta _B on the second output shaft rotation angle map for use after inversion The angle θ ₄₀ is gradually approached to the second output shaft rotation angle θ _B on the second output shaft rotation angle map to be used after the reversal so as to be gradually eliminated.

FIG. 12B is an explanatory diagram showing one mode of the correction value X. In the present embodiment, the angle θ ₄₀ on the curve 190 in FIG. 12 is corrected as a range of the first output shaft rotation angle θ _B that gradually approaches the second output shaft rotation angle θ _B on the curve 192 used after inversion. Set the section γ. Range of the first output axis rotation angle theta _A in the correction section gamma (difference) is a fixed value in principle, so that reversing the wiping operation from the stop position is performed smoothly, but determined through experimentation or the like, FIG. As shown in FIGS. 12 (A) and 12 (B), when the enlargement ratio is reduced after the reversal, the above-described correction section β is used to smoothly switch from the angle indicated by the point 210A to the angle on the curve 192. Also lengthen. More specifically, in FIG. 12, the correction section γ corresponds to the angle at which the second output shaft rotation angle θ _B when the curve 192 is used is maximized from the first output shaft rotation angle θ ₃₀ corresponding to the point 210A. The first output shaft rotation angle θ _A exceeding the first output shaft rotation angle θ _A (the first output shaft rotation angle θ corresponding to the angle at which the second output shaft rotation angle θ _B becomes maximum when using the curve 192) _{A section} between _A and the first predetermined rotation angle θ ₁ corresponding to the upper inversion position P2P up to the first output shaft rotation angle θ _A ). In the present embodiment, by setting the correction section γ, the enlargement ratio indicated by the curve 190 after the inverted passenger seat side wiper blade 36 exceeds the midpoint between the upper inversion position P1P and the lower inversion position P2P. To the magnification shown by curve 192.

As shown in FIG. 12 (B), the correction value X is, in the correction section gamma, linearly monotonically from the minimum value is a negative value in response to the first output shaft rotation angle theta _A 0 is the maximum value To increase. The maximum value of the correction value X is determined according to Δθ ₄₀ , and the rate of change (slope) with respect to the first output shaft rotation angle θ _A is determined by the correction section γ.

12 In (A), when has been controlling the first output shaft rotation angle theta _A and the second output shaft rotational angle theta _B in the direction of arrow 214 with a curve 190, the passenger seat in reservoir snow side wiper blade 36 Is stopped, the second output shaft rotation angle θ _B indicated by the point 210A gradually approaches the second output shaft rotation angle θ _B indicated by the curve 192, and the second output shaft rotation angle θ _B indicated by the curve 192 ends at the end of the correction section γ. to coincide with the second output shaft rotation angle theta _B. That is, the transition operation 242 is performed in the direction of the arrow 216 from the point 210A to the point 210B on the curve 192.

The above equation (1) is used to gradually bring the second output shaft rotation angle θ _B indicated by the point 210A closer to the second output shaft rotation angle θ _B indicated by the curve 192. Here, X (θ _A ) in Expression (1) is a correction value X that changes according to the first output shaft rotation angle θ _A within the correction interval γ, and f (θ _A ) is within the correction interval γ. a second output shaft rotational angle theta _B on the first output shaft rotation angle theta curve 192 which corresponds to _a of the. Θ _GB is the second output shaft asymptotic rotation angle θ _GB that gradually approaches the second output shaft rotation angle θ _B indicated by the curve 192 within the correction section γ.

Correction value X as described above, increases monotonically to 0 as the maximum value from the minimum value to a negative value in response to the first output shaft rotation angle theta _A.

As a result, the second output shaft asymptotic rotation angle θ _GB calculated by Expression (1) gradually approaches the second output shaft rotation angle θ _B (f (θ _A )) indicated by the curve 192, and the end of the correction section γ. And the second output shaft rotation angle θ _B (f (θ _A )) indicated by the curve 192.

  FIG. 13 shows that the passenger seat-side wiper blade 36 is stopped at the stop position 218A at the time of the backward movement due to a snow puddle, then turned forward and moved forward. It is explanatory drawing which showed the case where it was reversed after being stopped at 220A. FIG. 13 shows a case where the wiping operation is performed at the enlargement ratio of 50% using the curve 192 at the time of the backward movement, and is performed at the enlargement ratio of 100% using the curve 190 at the time of the forward movement. Therefore, at the time of the forward movement after the reversal from the stop position 218A, the wiping is performed using the curve 190 at an enlargement ratio of 100%, and at the time of the return movement after the reversal from the stop position 220A, the wiping is performed using the curve 192 at the enlargement ratio of 50%. Let it.

Further, in the present embodiment, as shown in FIG. 14 to FIG. 13 and described later, the range from 0 ° indicating the lower reversal position P2P to a predetermined first output shaft once relocated angle theta _A, and the upper reversing position P1P the first predetermined rotation angle range of theta ₁ of a predetermined angle before showing the snow accumulation determination range [delta] _1, has a [delta] _2. In the present embodiment, the wiping operation is reversed when the passenger seat side wiper blade 36 stops in the snow puddle determination range δ ₁ , δ ₂ . Snow accumulation determination range [delta] ₁ in the vicinity of the lower reversal position P2P is set wider than the snow reservoir determination range [delta] ₂ in the vicinity of the upper reversing position P1P.

In the reversal from the stop position 218A in FIG. 13, the second output shaft rotation angle θ _B at the stop position 218A gradually approaches the second output shaft rotation angle θ _B indicated by the curve 190 in the correction section β. The width of the correction section β is the same as in FIGS. 11A and 11B. In the present embodiment, a correction section β having a smaller range than the correction section γ is used when increasing the enlargement ratio at the time of inversion, and a correction section having a wider range than the correction section β when decreasing the enlargement ratio at the time of inversion. Use γ. More specifically, in FIG. 13, the correction section β corresponds to the angle at which the second output shaft rotation angle θ _B when the curve 190 is used is maximized from the first output shaft rotation angle θ _A corresponding to the stop position 218A. there is a previous section (the first output shaft rotation angle side corresponding to the stop position 218A) first output shaft rotation angle theta _a from front to. Further, the correction section γ corresponds to the first output shaft rotation angle θ _A corresponding to the stop position 220A and the first output shaft rotation angle θ _B corresponding to the angle at which the second output shaft rotation angle θ _B when the curve 192 is used is maximized. first output shaft rotation angle theta _a (curve 192 first output shaft rotation angle theta _a and a lower reversing position where the second output shaft rotation angle theta _B corresponds to the angle at which the maximum when using in excess of the rotational angle theta _a This is a section up to the first output shaft rotation angle θ _A between the first output shaft rotation angle (0 °) corresponding to P2P.

In calculating the asymptotic rotation angle θ _GB of the second output shaft in the correction section β in FIG. 13, the correction value X (θ _A ) in the case of FIG. 12B and the following equation (2) are used. In the equation (2), f (θ _A ) is the second output shaft rotation angle θ _B on the curve 190 corresponding to the first output shaft rotation angle θ _A in the correction section β.
θ _GB = f (θ _A ) + X (θ _A ) (2)

The correction value X (θ _A ) in the case of FIG. 12B monotonically increases from a minimum value indicating a negative value to 0 which is a maximum value according to the first output shaft rotation angle θ _A.

As a result, the second output shaft asymptotic rotation angle θ _GB calculated by the equation (2) gradually approaches the second output shaft rotation angle θ _B indicated by the curve 190, and the second output shaft rotation angle θ _B indicated by the curve 190 at the end of the correction section β. matching output shaft rotational angle _{θ B (f (θ a)} ). That is, the shifting operation 244 is performed from the stop position 218A to the point 218B on the curve 190.

In addition, the second output shaft asymptotic rotation angle θ _GB in the correction section γ in FIG. 13 is calculated using the correction value X (θ _A ) in the case of FIG. 11B and the above equation (2). The width of the correction section γ is the same as in FIGS. 12A and 12B. In the equation (2), f (θ _A ) is the second output shaft rotation angle θ _B on the curve 192 corresponding to the first output shaft rotation angle θ _A in the correction section γ.

Although the correction value X (θ _A ) in the case of FIG. 11B monotonically increases from 0 to the maximum value according to the first output shaft rotation angle θ _A , in the correction section γ of FIG. ), as in the case of (B), since the inverted from the stop position 220A, the first output shaft rotation angle theta _a in correction interval γ monotonically decreases. Therefore, in the correction section γ in FIG. 13, X (θ _A ) monotonically decreases in accordance with the first output shaft rotation angle θ _A changing in the direction of the arrow 222 in FIG. 13, and reaches the minimum value at the end of the correction section γ. 0.

As a result, the second output shaft asymptotic rotation angle θ _GB calculated by Expression (2) gradually approaches the second output shaft rotation angle θ _B (f (θ _A )) indicated by the curve 192, and the end of the correction section γ. And the second output shaft rotation angle θ _B (f (θ _A )) indicated by the curve 192. That is, the transition operation 246 is performed from the stop position 220A to the point 220B on the curve 192.

  FIG. 14 summarizes the cases of FIGS. 11A and 11B and FIGS. 12A and 12B into one second output shaft rotation angle map. In FIG. 14, the passenger seat side wiper blade 36 is stopped at the stop position 230 </ b> A at the time of backward movement due to a snow puddle, then turned forward and moved forward. It is explanatory drawing which showed the case where it was reversed after being stopped at 232A. FIG. 14 shows a case where the wiping operation is performed at the enlargement ratio of 50% using the curve 192 during the forward movement, and the wiping operation is performed at the enlargement ratio of 100% using the curve 190 during the backward movement. Therefore, during the forward movement after the reversal from the stop position 230A, the wiping is performed using the curve 192 at an enlargement rate of 50%, and when the reversal is performed after the reversal from the stop position 232A, the wiping is performed using the curve 190 at the enlargement rate of 100%. Let it.

In the reversal from the stop position 230A in FIG. 14, the second output shaft rotation angle θ _B at the stop position 230A gradually approaches the second output shaft rotation angle θ _B indicated by the curve 192 in the correction section γ. The width of the correction section γ is the same as in FIGS. 12A and 12B. More specifically, in FIG. 14, the correction section γ corresponds to the angle at which the second output shaft rotation angle θ _B when the curve 192 is used becomes the maximum from the first output shaft rotation angle θ _A corresponding to the stop position 230A. The first output shaft rotation angle θ _A exceeding the first output shaft rotation angle θ _A (the first output shaft rotation angle θ corresponding to the angle at which the second output shaft rotation angle θ _B becomes maximum when using the curve 192) _{A section} between _A and the first predetermined rotation angle θ ₁ corresponding to the upper inversion position P1P up to the first output shaft rotation angle θ _A ).

In calculating the second output shaft asymptotic rotation angle θ _GB in the correction section γ in FIG. 14, the correction value X (θ _A ) in the case of FIG. 12B and the above equation (1) are used. In Expression (1), f (θ _A ) is the second output shaft rotation angle θ _B on the curve 192 corresponding to the first output shaft rotation angle θ _A in the correction section γ.

The correction value X (θ _A ) in the case of FIG. 12B monotonically increases from a minimum value indicating a negative value to 0 which is a maximum value according to the first output shaft rotation angle θ _A.

As a result, the second output shaft asymptotic rotation angle θ _GB calculated by Expression (1) gradually approaches the second output shaft rotation angle θ _B (f (θ _A )) indicated by the curve 192, and the end of the correction section γ. And the second output shaft rotation angle θ _B (f (θ _A )) indicated by the curve 192. That is, the transition operation 248 is performed from the stop position 230A to the point 230B on the curve 192.

Further, the second output shaft asymptotic rotation angle θ _GB in the correction section β in FIG. 14 is calculated using the correction value X (θ _A ) in the case of FIG. 11B and the above equation (1). The width of the correction section β is the same as in FIGS. 11A and 11B. More specifically, in the present invention, the correction section β corresponds to the angle at which the second output shaft rotation angle θ _B when the curve 190 is used is maximized from the first output shaft rotation angle θ _A corresponding to the stop position 232A. there is a previous section (the first output shaft rotation angle theta _a side corresponding to the stop position 232A) than the front first output shaft rotation angle theta _a. In Expression (1), f (θ _A ) is the second output shaft rotation angle θ _B on the curve 190 corresponding to the first output shaft rotation angle θ _A in the correction section β.

The correction value X (θ _A ) in the case of FIG. 11B monotonically increases from 0 to the maximum value according to the first output shaft rotation angle θ _A , but in the correction section β of FIG. ), as in the case of (B), since the inverted from the stop position 232A, the first output shaft rotation angle theta _a in correction interval β monotonously decreases. Therefore, in the correction section β in FIG. 14, X (θ _A ) monotonously decreases in accordance with the first output shaft rotation angle θ _A that changes in the direction of the arrow 234 in FIG. There is a certain 0.

As a result, the second output shaft asymptotic rotation angle θ _GB calculated by the equation (1) gradually approaches the second output shaft rotation angle θ _B (f (θ _A )) indicated by the curve 190, and the end of the correction section β. And the second output shaft rotation angle θ _B (f (θ _A )) indicated by the curve 190. That is, the transition operation 250 is performed from the stop position 232A to the point 232B on the curve 190.

  FIG. 15 is a flowchart showing an example of the snow pool processing in the wiping range expanding wiper device according to the present embodiment. In step 150, it is determined whether or not the current of the first motor 11 has exceeded a predetermined value and has entered an overcurrent state. If an affirmative determination is made in step 150, the procedure proceeds to step 152, and if a negative determination is made in step 150, the process returns. The current value of each motor is detected by, for example, a current sensor (not shown) including a shunt resistor and an amplifier.

In step 152, it determines the first output shaft rotation angle theta _A detected by the first absolute angle sensor 114, snow accumulation determination range [delta] ₁ shown in FIGS. 13 and 14, whether or not in the [delta] _2. If an affirmative determination is made in step 152, the procedure proceeds to step 154. If a negative determination is made in step 152, the process returns.

In step 154, the rotational speed of the first output shaft 11A which is calculated from the change of the first output shaft rotation angle theta _A detected by the first absolute angle sensor 114 determines whether less than a predetermined value. If an affirmative determination is made in step 154, the procedure proceeds to step 156. If a negative determination is made in step 154, the process returns. Note that the determination of the overcurrent in step 150, the determination of the snow puddle angle in step 152, and the determination of the rotation speed in step 154 are not limited to the order shown in FIG. For example, the snow pool angle determination may be performed in step 150, the rotation speed determination may be performed in step 152, and the overcurrent determination may be performed in step 156.

  In step 156, it is determined whether the enlargement ratio of the next operation from the stop position is different from the enlargement ratio of the current operation. If an affirmative determination is made in step 156, the procedure proceeds to step 158. If a negative determination is made in step 156, the process returns.

  In step 158, it is determined whether the magnification of the current operation is less than the magnification of the next operation from the stop position. If an affirmative determination is made in step 158, the procedure proceeds to step 160, and if a negative determination is made in step 158, the procedure proceeds to step 166.

In step 160, it is determined whether or not the next operation from the stop position is forward wiping. In this embodiment, the stop position of the passenger's side wiper blade 36, in the case of snow accumulation determination range δ _1, it is determined that the next operation is forward wiping, snow accumulation determination range δ in ₂ In this case, it is determined that the next operation is the return wiping. If an affirmative determination is made in step 160, the procedure proceeds to step 162, and if a negative determination is made in step 160, the procedure proceeds to step 164.

In step 162, as correction interval β of FIG. 13, controls the second output shaft rotational angle theta _B as enlargement ratio to 100% during the forward scan, by wiping the passenger side wiper blade 36 Return the processing.

In step 164, as correction interval β of FIG. 14, the enlargement ratio at the time of backward movement controls to be 100% the second output shaft rotational angle theta _B, by wiping the passenger side wiper blade 36 Return the processing.

In step 166, it is determined whether the next operation from the stop position is forward wiping. In this embodiment, the stop position of the passenger's side wiper blade 36, in the case of snow accumulation determination range δ _1, it is determined that the next operation is forward wiping, snow accumulation determination range δ in ₂ In this case, it is determined that the next operation is the return wiping. If an affirmative determination is made in step 166, the procedure shifts to step 168. If a negative determination is made in step 166, the procedure shifts to step 170.

In step 168, as correction interval γ in FIG. 14, controls the second output shaft rotational angle theta _B as magnification during the forward scan is 50% by wiping the passenger side wiper blade 36 Return the processing.

In step 170, as correction interval γ in FIG. 13, magnification during backward movement controls the second output shaft rotational angle theta _B to be 50%, by wiping the passenger side wiper blade 36 Return the processing.

  As described above, according to the present embodiment, the microcomputer 58 sets the wiping range during the wiping operation of the passenger's seat side wiper blade 36 inverted at a position other than the lower inversion position P2P and the upper inversion position P1P. The rotation of the first motor 11 and the second motor 11 is controlled so that the enlargement / reduction amount gradually changes to an enlargement / reduction amount different from that before the inversion. With this control, the amount of enlargement or reduction of the wiping range can be changed without discomfort in the reversing operation after the wiping operation is hindered by the external force.

  In the present embodiment, the rotation of the first output shaft 11A of the first motor 11 causes the driver's seat wiper blade 18 and the passenger's seat wiper blade 36 to move to the upper inversion positions P1D and P1P and the lower inversion positions P2D and P2P. , But is not limited to this. For example, a “driver-side first motor” and a “passenger-side first motor” are provided as the first motor 11, and the rotation of the driver-side first motor causes the driver-side wiper blade 18 to move upward and downward to the inverted position P1D. The structure may be such that the passenger side wiper blade 36 is moved between the upper reversing position P1P and the lower reversing position P2P by being moved between the reversing position P2D and the rotation of the passenger side first motor.

  In the present embodiment, the driver's seat side wiper blade 18 and the passenger's seat side wiper blade 36 are configured not to overlap in the vehicle width direction at the lower inversion positions P2D and P2P, but the present invention is limited to this. There is no. For example, the driver's seat side wiper blade 18 side of the passenger side wiper blade 36 may be set to be long. In other words, the length of the passenger side wiper blade 36 is set such that the driver side wiper blade 18 side of the passenger side wiper blade 36 overlaps the passenger side wiper blade 36 side of the driver side wiper blade 18. Is also good. Thereby, when wiping the wiping range Z2 during the reciprocating motion, it is possible to reduce the wiping-impossible region remaining below the center of the windshield glass.

  In the present embodiment, the passenger seat side wiper arm 35 (passenger seat side wiper blade 36) is extended to near the intermediate angle at the predetermined rotation angle of the first output shaft 11A, and from the vicinity of the intermediate angle to the predetermined rotation angle. The control to reduce the passenger's seat side wiper arm 35 (the passenger's seat side wiper blade 36) is performed during the period, but the present invention is not limited to this. For example, when the passenger side wiper blade 36 wipes from the lower inversion position P2P toward the upper inversion position P1P (at the time of forward wiping), the control may be performed so that the passenger side wiper arm 35 is gradually extended.

  In the present embodiment, the embodiment using the rotation angle of the first output shaft 11A of the first motor 11 and the rotation angle of the second output shaft 12A of the second motor 12 has been described. Thus, the rotational position of the first output shaft 11A and the rotational position of the second output shaft 12A may be used.

  In this embodiment, the reciprocating magnification is set to 100% for the forward movement, 50% for the backward movement, or 50% for the forward movement and 100% for the backward movement. Although the wiping operation is performed, the present invention is not limited to this. For example, the reciprocating wiping operation may be performed by setting the enlargement ratio at the time of forward movement to 100% and the enlargement ratio at the time of backward movement to 0% (normal wiping).

When the passenger seat side wiper blade 36 is stopped outside the snow puddle determination ranges δ ₁ and δ ₂ , the first motor 11 returns from the stop position to the lower inversion position P2P or the upper inversion position P1P. And the second motor 12 is controlled. More specifically, when the passenger seat side wiper blade 36 stops outside the snow puddle determination range δ ₁ , δ ₂ during the forward movement, the first output shaft rotation angle θ _A is moved from the stop position toward the lower inversion position P2P. and second output shaft rotation angle theta _B performs control so as to gradually become 0 °. Further, when the passenger seat side wiper blade 36 stops outside the snow puddle determination ranges δ ₁ , δ ₂ at the time of returning, the first output shaft rotation angle θ _A is shifted from the stop position toward the upper reversing position P1P. gradually the theta _1, performs control such that the second output shaft rotational angle theta _B becomes gradually 0 °.

DESCRIPTION OF SYMBOLS 1 ... Windshield glass (windshield), 1A ... Light shielding part, 2 ... Wiper device, 3 ... Central frame, 3A ... Support part, 4, 5 ... Pipe frame, 6 ... First holder member, 6A ... Fixed part, 7 ... Second holder member, 7A ... Fixed part, 7B ... Cylindrical part, 11 ... First motor, 11A ... First output shaft, 12 ... Second motor, 12A ... Second output shaft, 13 ... First drive crank arm , 14: second driving crank arm, 15: driver side pivot shaft, 16: driver side swing lever, 17: driver side wiper arm, 18: driver side wiper blade, 19: first connecting rod, 21 ... First passenger seat-side pivot shaft, 22 ... second passenger seat-side pivot shaft, 23, 24 ... bearing, 25 ... first passenger seat-side swing lever, 26 ... first drive lever, 27 ... second connecting rod, 28 … The second passenger side swing lever, 9 ... second drive lever, 31 ... third connecting rod, 32 ... first driven lever, 33 ... arm head, 34 ... retainer, 35 ... passenger seat side wiper arm, 36 ... passenger seat side wiper blade, 50 ... wiper switch, 52: control circuit, 54: direction indicator switch, 56: drive circuit, 57: washer motor drive circuit, 58: microcomputer, 60: memory, 62: washer switch, 64: washer motor, 66: washer pump, 68 ... Washer liquid tank, 70 ... Washer device, 72A ... Driver side hose, 72B ... Passenger side hose, 74A ... Driver side nozzle, 74B ... Passenger side nozzle, 76 ... Rain sensor, 78 ... Relay drive circuit, 80 ... FET drive circuit, 84: relay unit, 84A1, 84A2: first terminal, 84B1, 84B2 2nd terminal, 84C1, 84C2 ... common terminal, 90 ... vehicle ECU, 92 ... vehicle speed sensor, 94 ... in-vehicle camera, 96 ... GPS device, 98 ... steering angle sensor, 100 ... wiper system, 104 ... 1st pre-driver, 106 ... second pre-driver, 108 ... first motor drive circuit, 110 ... second motor drive circuit, 112 ... output shaft end, 112A ... sensor magnet, 114 ... first absolute angle sensor, 116 ... output shaft end, 116A ... Sensor magnet, 118 ... Second absolute angle sensor, 135 ... Passenger seat side wiper arm, 136 ... Passenger seat side wiper arm, 144P ... Passenger seat side wiper arm, 154P ... Passenger seat side wiper blade, 158 ... non-wiping range, 160 ... four-node link mechanism, 190, 192 ... curve, 200 ... arrow, 202A, 202 B, 204 ... point, 206 ... arrow, 210A, 210B, 212 ... point, 214, 216 ... arrow, 218A, 220A ... stop position, 218B, 220B ... point, 222 ... arrow, 230A, 232A ... stop position, 230B, 232B: Point, 234: Arrow, 240, 242, 244, 246, 248, 250: Transition operation, 300: Curve, 302: Straight line, 304: Point, RLY1, RLY2: Relay, CC1, CC2, CC3, CW1, CW2 ... Rotating direction, CW3 ... Moving direction, H1: Wiping range, K ... Waterproof cover, L1 ... First axis, L2 ... Second axis, L3 ... Third axis, L4 ... Fourth axis, L ... Same straight line, L5 ... F5 axis, P1D, P1P, P3P... Upper inversion position, P2D, P2P, P4P... Lower inversion position, X... Correction value, Z1, Z2, Z10, Z12. .delta.1, .delta.2 ... snow accumulation determination _{range, θ 3, θ 4, θ} 10, θ 20, θ 30, θ 40 ... angle, theta ₁ ... first given rotation angle, theta ₂ ... second predetermined rotational angle, theta _A ... First output shaft rotation angle, θ _B : second output shaft rotation angle, θ _GB : second output shaft asymptotic rotation angle, θm: intermediate rotation angle,

Claims (12)

A first motor for wiping the wiper blade connected to the tip end of the wiper arm on the windshield by rotation of the first output shaft;
A second motor configured to operate a telescopic mechanism provided on the wiper arm by rotation of a second output shaft to expand and contract a wiping range of the windshield by the wiper blade;
The wiper blade controls the rotation of the first motor and the second motor so that the wiping range of the windshield by the wiper blade is expanded and contracted by a different amount on one side and the other on the reciprocating path. When the vehicle stops at an undefined position other than a predetermined stop position on one of the roads, the first expansion and contraction amount after reversing from the uncertain position gradually changes to the other expansion and contraction amount of the reciprocating path. A control unit for controlling rotation of a motor and the second motor;
The wiping range expansion wiper device including.   The control unit may be configured such that during the wiping operation of the wiper blade inverted at the indefinite position, the rotation angle of the second output shaft gradually changes to a rotation angle corresponding to the other amount of expansion and contraction of the reciprocating path. The wiping range enlarging wiper device according to claim 1, wherein the wiping range expanding wiper device controls rotation of the first motor and the second motor. A first rotation angle detection unit that detects a rotation angle of the first output shaft;
A second rotation angle detection unit that detects a rotation angle of the second output shaft;
A storage unit that stores rotation angle information in which the rotation angle of the second output shaft with respect to the rotation angle of the first output shaft is determined according to different amounts of expansion and contraction,
The control unit may be configured such that the rotation angle of the second output shaft detected by the second rotation angle detection unit corresponds to the rotation angle of the first output shaft detected by the first rotation angle detection unit. 3. The wiping range expanding wiper device according to claim 2, wherein the rotation of the first motor and the second motor is controlled so as to gradually change to a rotation angle corresponding to the other amount of expansion and contraction of the reciprocating path in the angle information.   The control unit applies the rotation angle of the second output shaft detected by the second rotation angle detection unit at the indefinite position and the other amount of expansion and contraction of the reciprocating path at the indefinite position in the rotation angle information. And a minimum value and a maximum value corresponding to a difference between the rotation angle of the second output shaft and the rotation angle of the second output shaft, and monotonically changes from the minimum value to the maximum value for a rotation angle of the first output shaft in a predetermined range. Using the correction value, while the first output shaft rotates at the rotation angle within the predetermined range, the rotation angle of the second output shaft detected by the second rotation angle detector is the other of the two reciprocating paths. 4. The wiping range expanding wiper device according to claim 3, wherein the rotation of the first motor and the second motor is controlled so as to gradually change to a rotation angle corresponding to the amount of expansion and contraction of the wiping range.   The controller, when the amount of expansion and contraction on the other side of the reciprocating path is set to be larger than the amount of expansion and contraction on one side of the reciprocating path, sets the amount of expansion and contraction after inversion from the indefinite position on the other side of the reciprocating path. In the wiping operation, the rotations of the first motor and the second motor are controlled so as to perform a transition operation that matches the amount of expansion / contraction on the other side of the reciprocating path until the rotation angle of the second output shaft is maximized. The wiping range expanding wiper device according to claim 3 or 4. The controller, when the amount of expansion and contraction on the other side of the reciprocating path is set to be smaller than the amount of expansion and contraction on one side of the reciprocating path, sets the amount of expansion and contraction after inversion from the indefinite position on the other side of the reciprocating path. In the wiping operation, the rotation of the first motor and the second motor is controlled so that a transition operation for matching the amount of expansion / contraction on the other side of the reciprocating path is performed after the rotation angle of the second output shaft is maximized. The wiping range expanding wiper device according to claim 3 or 4. The rotation of a first output shaft of a first motor for operating the wiper arm is controlled so that a wiper blade connected to a tip end of the wiper arm is wiped on a windshield, and a telescopic mechanism provided on the wiper arm is operated. An wiping step of controlling the rotation of the second output shaft of the second motor so that the wiping range of the windshield by the wiper blade is expanded and contracted by a different amount of expansion and contraction between one and the other of the reciprocating path;
When the wiper blade is stopped at an undefined position other than a predetermined stop position on one of the reciprocating paths, the amount of expansion and contraction after reversing from the undefined position gradually changes to the other amount of expansion and contraction of the reciprocating path. An enlargement / reduction amount changing step of controlling rotation of the first motor and the second motor as described above;
The control method of the wiper device for expanding the wiping range including:   In the enlargement / reduction amount changing step, the rotation angle of the second output shaft is gradually changed to a rotation angle corresponding to the other enlargement / reduction amount of the reciprocating path during the wiping operation of the wiper blade inverted at the indefinite position. The control method of the wiping range expanding wiper device according to claim 7, wherein the rotation of the first motor and the second motor is controlled as described above. A first rotation angle detecting step of detecting a rotation angle of the first output shaft;
A second rotation angle detection step of detecting a rotation angle of the second output shaft,
The enlargement / reduction amount changing step refers to rotation angle information that defines the rotation angle of the second output shaft with respect to the rotation angle of the first output shaft according to different enlargement / reduction amounts, and detects the rotation angle information by the second rotation angle detection step. The rotation angle of the second output shaft determined according to the other rotation amount of the reciprocating path in the rotation angle information corresponding to the rotation angle of the first output shaft detected by the first rotation angle detection step. 9. The control method of the wiper range expanding wiper device according to claim 8, wherein the rotation of the first motor and the second motor is controlled so as to gradually change to a rotation angle.   The enlarging / reducing amount changing step includes the step of: applying the rotation angle of the second output shaft detected by the second rotation angle detecting step at the indefinite position and the other enlarging / reducing amount of the reciprocating path at the indefinite position. A minimum value and a maximum value corresponding to a difference between the rotation angle of the second output shaft and the rotation angle of the second output shaft. A correction value that monotonically changes from the minimum value to the maximum value with respect to the rotation angle of a predetermined range of the first output shaft. The rotation angle of the second output shaft detected by the second rotation angle detection step is used while the first output shaft rotates at the rotation angle within the predetermined range. The control method of the wiping range expansion wiper device according to claim 9, wherein the rotation of the first motor and the second motor is controlled so as to gradually change to a rotation angle corresponding to the rotation angle.   The enlarging / reducing amount changing step includes, when the enlarging / reducing amount on the other side of the reciprocating path is set to be larger than the enlarging / reducing amount on one side of the reciprocating path, the enlarging / reducing amount after reversing from the indefinite position. In the wiping operation on the other side, the rotation of the first motor and the second motor is performed so as to perform a transition operation to match the amount of expansion and contraction on the other side of the reciprocating path until the rotation angle of the second output shaft is maximized. The control method of a wiper device for enlarging a wiping range according to claim 9, wherein the control is performed. The enlarging / reducing amount changing step, when the enlarging / reducing amount on the other side of the reciprocating path is set to be smaller than the enlarging / reducing amount on one side of the reciprocating path, the enlarging / reducing amount after reversing from the indefinite position. In the wiping operation on the other side, the rotation of the first motor and the second motor is performed such that the rotation angle of the second output shaft is maximized and then a transition operation for matching the amount of expansion / contraction on the other side of the reciprocating path is performed. The control method of a wiper device for enlarging a wiping range according to claim 9, wherein the control is performed.

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