JP6423247B2 - Electric steering lock device - Google Patents

Description

  The present invention relates to an electric steering lock device that locks rotation of a steering wheel when a vehicle is parked.

  In this type of electric steering lock device, an engagement recess is provided on the outer periphery of a steering shaft that rotates in accordance with a steering wheel operation. In this electric steering lock device, when the driver performs a stop operation of the engine of the automobile by a switch or the like, the lock member advances by the drive of the electric motor and engages with the engagement recess. Thereby, the steering wheel is locked by restricting the rotation of the steering shaft. On the other hand, in the electric steering lock device, when the driver starts the engine with a switch or the like, the lock member is retracted by driving the electric motor, and the engagement with the engagement recess is released. Thereby, the steering wheel is unlocked by releasing the rotation restriction of the steering shaft. The engine is started after unlocking.

  The electric steering lock device of Patent Document 1 includes a CPU unit (microcomputer) including a RAM for storing control data. In order to hold the data stored in the RAM, it is necessary to supply a power supply voltage of a predetermined value or more. For this reason, the CPU unit is provided with a capacitor for holding the power supply voltage. Even if the power supply voltage is momentarily interrupted, the RAM data can be held within a predetermined time, and the electric steering lock device is controlled. Can be continued.

  By the way, in order to start the vehicle engine, in consideration of safety, after the steering shaft unlocking is completed normally and the power supply to the microcomputer of the electric steering lock device is cut off, the microcomputer stops completely There is a need to. However, since the capacitor is provided in the power supply line to the microcomputer, the microcomputer does not stop until the electric charge stored in the capacitor is released and the power supply is completely cut off. As a result, it takes a long time until the engine is actually started after the user performs a switch operation for starting the engine.

JP 2005-47315 A

  An object of the present invention is to quickly release the electric charge stored in the capacitor after the power supply from the power source is cut off without impairing the instantaneous interruption resistance of the electric steering lock device, and to stop the microcomputer. It is an object of the present invention to provide an electric steering lock device that can shorten the time.

  The present invention solves the above problems by the following means. In addition, in order to make an understanding easy, although the code | symbol corresponding to embodiment of this invention is attached | subjected and demonstrated, it is not limited to this.

  According to the first aspect of the present invention, there is provided a lock member (31) movable between a lock position for engaging with a steering shaft of a vehicle and an unlock position for releasing the engagement, and a drive mechanism for moving the lock member. (40a, 62), a motor (61) for operating the drive mechanism, and an unlock drive control for controlling the motor to move the lock member to the unlock position, or the lock member to the lock position. The lock drive control for controlling the motor to be moved is executed, and the unused terminal (91a) not used for the control incorporated in itself is connected to the pull-up (98) resistor or the pull-down resistor (99), A microcomputer (91) for setting the use terminal to the output mode, a power supply path (L) for supplying power from the power source to the microcomputer, and conduction and interruption of the power supply path. And an upper level ECU (100) for controlling the operation of the microcomputer through communication. In the electric steering lock device, the microcomputer is normally connected to the output level of the unused terminal. Corresponding to the pull-up resistor or pull-down resistor, the power consumption is set to a low output level, and the unused ECU is used at a predetermined timing before the power supply path to the microcomputer is shut off. An electric steering lock device (91) having a current consumption setting unit (91b) that sets an output level of a terminal to an output level that increases current consumption in correspondence with the connected pull-up resistor or pull-down resistor. 1,3).

  According to a second aspect of the present invention, in the electric steering lock device according to the first aspect, the predetermined timing is when the unlock drive control or the lock drive control that has been executed is completed. It is a locking device (1, 3).

  According to a third aspect of the present invention, in the electric steering lock device according to the first aspect, the predetermined timing has received a cutoff notification signal that notifies the microcomputer in advance that the power supply path is cut off from the host ECU. It is an electric steering lock device (1, 3) characterized by that.

  According to the present invention, the electric steering lock device quickly discharges the electric charge stored in the capacitor after the power supply from the power source is interrupted without impairing the instantaneous interruption resistance, and until the microcomputer stops. It is possible to shorten the time.

1 is an exploded perspective view showing a first embodiment of an electric steering lock device according to the present invention. It is a longitudinal section showing the locked state of the electric steering lock device of a 1st embodiment. It is a longitudinal cross-sectional view which shows the unlocking state of the electric steering lock apparatus of 1st Embodiment. It is a control system block diagram of the electric steering lock apparatus of 1st Embodiment. It is a flowchart which shows the flow of operation | movement when performing unlock control of the electric steering lock apparatus of 1st Embodiment. It is a timing chart which shows the relation of operation of each part at the time of performing unlock control of the electric steering lock device of a 1st embodiment. It is a flowchart which shows the flow of operation | movement when performing unlock control of the electric steering lock apparatus of 2nd Embodiment. It is a timing chart which shows the relation of operation of each part at the time of performing unlock control of the electric steering lock device of a 2nd embodiment. It is a control system block diagram of the electric steering lock apparatus of 3rd Embodiment.

  The best mode for carrying out the present invention will be described below with reference to the drawings.

(First embodiment)
FIG. 1 is an exploded perspective view showing a first embodiment of an electric steering lock device according to the present invention.
FIG. 2 is a longitudinal sectional view showing a locked state of the electric steering lock device of the first embodiment.
FIG. 3 is a longitudinal sectional view showing an unlocked state of the electric steering lock device of the first embodiment.
In addition, each figure shown below including FIGS. 1-3 is a figure shown typically, and the magnitude | size and shape of each part are exaggerated suitably for easy understanding.
In the following description, specific numerical values, shapes, materials, and the like are shown and described, but these can be changed as appropriate.
Further, in the following description, unless otherwise specified, the description indicating the direction such as up and down refers to the direction in FIGS. 1 to 3.

  The electric steering lock device 1 according to the present invention locks / unlocks the rotation of a steering shaft (steering wheel) (not shown) by electric drive. The electric steering lock device 1 includes a case 10 made of a non-magnetic metal (for example, magnesium alloy) and a metal lid 20 that covers a lower surface opening of the case 10 as an exterior.

  The case 10 is formed in a rectangular box shape, and an arcuate recess 10a is formed in the upper part thereof. A column tube (not shown) is fitted into the recess 10 a, and the column tube is fixed to the case 10 by an arcuate bracket (not shown) attached to the case 10. Although not shown, a steering shaft is inserted into the column tube, and a steering wheel is attached to one end of the steering shaft. The other end of the steering shaft is connected to a steering gear box. When the driver rotates the steering wheel, the rotation is transmitted to the steering gear box via the steering shaft, the steering mechanism is driven, and the pair of left and right front wheels are steered to perform the required steering. .

  In addition, a rectangular connector arrangement portion 10 b is opened at the side portion of the case 10. On the other three side surfaces other than the side surface where the connector arrangement portion 10b is formed, circular pin holes 10c (only two are shown in FIG. 1) into which the pins 11 are press-fitted are formed.

  The lid 20 is formed in a rectangular flat plate shape, and three block-shaped pinning portions 21 and a bottomed cylindrical gear holding tube portion 22 are integrally provided upright on the inner surface (upper surface) thereof. Here, the three pin fastening portions 21 are formed at locations corresponding to the positions of the pin holes 10c of the case 10, and the circular pin insertion holes 21a (FIG. 1) into which the pins 11 are press-fitted are formed. Is formed with only one).

  The lid 20 is fitted into the inner periphery of the lower end of the case 10 so as to cover the lower surface opening of the case 10 from below. The lid 20 press-fits the pin 11 inserted into the three pin holes 10c formed in the side portion of the case 10 into the pin insertion holes 21a formed in the three pin fastening portions 21 erected on the lid 20. It is fixed to the case 10.

  The case 10 is formed with a lock member storage portion 10f and a substrate storage portion 10g, and the lock member storage portion 10f and the substrate storage portion 10g communicate with each other by an elongated communication portion 10h extending in the vertical direction.

  The lock unit 30 is stored in the lock member storage portion 10f. The lock unit 30 includes a substantially cylindrical driver 32 in which a male screw portion 32a is engraved on the outer periphery of the lower end, and a plate-like lock bolt (lock member) 31 accommodated in the driver 32 so as to be movable up and down. have. Here, the lock bolt 31 is formed with a long hole 31a that is long in the vertical direction, and the lock bolt 31 is connected to the driver 32 by a pin 34 that is inserted laterally into the long hole 31a. The pin 34 is inserted and held by press-fitting into a pin insertion hole 32b penetrating the driver 32 in the lateral direction.

  The lock bolt 31 is fitted in a rectangular lock bolt insertion hole 10d formed in the case 10 so as to be vertically movable. The lock bolt 31 is always urged upward by a spring 52 that is compressed between the lock bolt 31 and the partition wall 32 f of the driver 32. Normally, the lock bolt 31 moves up and down together with the driver 32 by engaging the lower part of the long hole 31 a of the lock bolt 31 with the pin 34.

  Further, a horizontally extending arm 32d and an anti-rotation portion 32c that is long in the vertical direction are integrally formed at opposite positions on the upper outer periphery of the driver 32. The arm 32d is accommodated in a communicating portion 10h formed in the case 10 so as to be movable up and down. The rotation preventing part 32 c engages with an engagement groove 10 e formed in the case 10 and restricts the rotation of the driver 32. And the magnet accommodating part 32e whose cross-sectional shape is a rectangle is formed in the front-end | tip part of the arm 32d. In the magnet storage portion 32e, a quadrangular prism-shaped magnet 33 is stored by press-fitting.

  A cylindrical gear member 40 is rotatably accommodated in a lock member accommodating portion 10f formed in the case 10. The outer periphery of the lower portion of the gear member 40 is rotatably held by a gear holding cylinder portion 22 erected on the inner surface (upper surface) of the lid 20. And the worm wheel 40a is formed in the lower outer periphery of this gear member 40, and the internal thread part 40b is formed in the inner periphery.

  The lower part of the driver 32 is inserted into the gear member 40, and the male screw part 32 a formed on the outer periphery of the lower part of the driver 32 meshes with the female screw part 40 b formed on the inner periphery of the gear member 40. ing. A spring 51 is mounted between a cylindrical spring receiver 23 formed at the center of the gear holding cylinder portion 22 of the lid 20 and a partition wall 32 f of the driver 32. The lock unit 30 (driver 32 and lock bolt 31) is always biased upward by a spring 51.

  An electric motor 61 is housed in a horizontally placed state in a lock member housing portion 10 f formed in the case 10. A small-diameter worm gear 62 is attached to the output shaft 61a of the electric motor 61 so as to rotate integrally with the output shaft 61a. The worm gear 62 is engaged with a worm wheel 40 a formed on the outer periphery of the gear member 40. The worm gear 62 and the worm wheel 40 a constitute a drive mechanism that converts the rotational force of the output shaft 61 a of the electric motor 61 into the advance / retreat force of the lock unit 30.

  On the other hand, a substrate 70 is stored in the substrate storage portion 10 g formed in the case 10 so that the inner surface thereof is parallel to the operation direction of the lock unit 30. The first magnetic sensor 72 and the second magnetic sensor 73 are respectively fixed to the positions corresponding to the unlock position and the lock position on the upper and lower surfaces of the substrate 70 with the substrate 70 as a base portion. The first magnetic sensor 72 is provided at a position facing the magnet 33 when the lock bolt 31 is in the unlock position. The second magnetic sensor 73 is provided at a position facing the magnet 33 when the lock bolt 31 is in the unlock position. The position (lock position / unlock position) of the lock unit 30 is detected by the first magnetic sensor 72, the second magnetic sensor 73, and the magnet 33.

Further, two motor power supply terminals 71 are projected from the board 70. These motor power supply terminals 71 are connected to the electric motor 61.
Further, a connector 80 is attached to the substrate 70. The connector 80 is connected to an electric connection line on the vehicle body side (not shown) that connects the electric steering lock device 1 and an external host ECU (Electronic Control Unit) 100.

FIG. 4 is a control system configuration diagram of the electric steering lock device of the first embodiment.
The electric steering lock device 1 includes a microcomputer 91, a communication circuit 92, a power supply control unit 93, a constant voltage circuit 94, a first capacitor 95, a second capacitor 96, a motor drive control unit 97, And a pull-up resistor 98. In addition, the electric steering lock device 1 includes a host ECU 100 connected via a connector 80. Furthermore, the electric steering lock device 1 is connected to a power source 200 via a connector 80.

The microcomputer 91 is a CPU unit including a RAM for storing control data, and controls the operation of the electric steering lock device 1 under the control of the host ECU 100. The microcomputer 91 unlocks the motor drive control unit 97 so that the lock bolt 31 moves in the unlock position direction, and the motor drive control unit so that the lock bolt 31 moves in the lock position direction. A lock operation signal for controlling the lock drive of 97 is selectively output to the motor drive control unit 97.
The microcomputer 91 is provided with an unused terminal 91a and a current consumption setting unit 91b.

  The unused terminal 91 a is a terminal that is not used for control built in the microcomputer 91. Pull-up resistors 98 are connected to each unused terminal 91a (four in the example of FIG. 4).

  The current consumption setting unit 91b normally sets the output level of the unused terminal 91a to an output level with a low current consumption corresponding to the connected pull-up resistor 98. Further, the current consumption setting unit 91b associates the output level of the unused terminal 91a with the connected pull-up resistor 98 at a predetermined timing before the host ECU 100 cuts off the power supply path L to the microcomputer. Set to an output level that increases current consumption.

  The communication circuit 92 is a circuit for the microcomputer 91 to communicate with the host ECU 100 via the connector 80.

  The power supply control unit 93 is a switching element that switches between interruption and conduction of a power supply path that supplies power from the power source 200 to the microcomputer 91 and the motor drive control unit 97 (this switching element is not a mechanical switch or relay). Or a semiconductor switching element such as a transistor. When the ON signal of the power supply permission signal is input from the host ECU 100, the power supply control unit 93 conducts the power supply path L and supplies power to the microcomputer 91 and the motor drive control unit 97. In addition, when an off signal of the power supply permission signal is input from the host ECU 100, the power supply control unit 93 blocks the power supply path L and blocks power supply to the microcomputer 91 and the motor drive control unit 97.

  The constant voltage circuit 94 is provided between the power supply control unit 93 and the microcomputer 91, and adjusts the voltage supplied to the microcomputer 91 so as to be a constant value. In this embodiment, the constant voltage circuit 94 adjusts the 12V system voltage supplied from the power source 200 side to the 5V system voltage supplied to the microcomputer 91 side.

The first capacitor 95 is an electrolytic capacitor for holding a power supply voltage that is disposed on a power supply path L between the power supply control unit 93 and the constant voltage circuit 94.
The second capacitor 96 is an electrolytic capacitor for holding a power supply voltage that is disposed on a power supply path L between the constant voltage circuit 94 and the microcomputer 91.
The first capacitor 95 and the second capacitor 96 supply a power supply voltage of a predetermined value or more to the microcomputer in order to hold the data stored in the RAM of the microcomputer 91 in the case where the power supply voltage is momentarily interrupted. Is provided to do. Since the first capacitor 95 and the second capacitor 96 are provided, the data in the RAM can be held within a predetermined time even if the power supply voltage is momentarily interrupted. Can be continued.
The first capacitor 95 stores a charge equivalent to 12V system, and the second capacitor 96 stores a charge equivalent to 5V system. Further, when the power supply voltage is momentarily interrupted, the first capacitor 95 is mainly involved in continuing the operation of the microcomputer 91. Regarding the power supply cut-off time of the microcomputer 91, both the first capacitor 95 and the second capacitor 96 are involved. Is involved.

  The motor drive control unit 97 selectively forms a power supply path to the electric motor 61 according to the direction in which the electric motor 61 is rotated in response to the unlock operation signal or the lock operation signal sent from the microcomputer 91.

  The pull-up resistor 98 is connected to each unused terminal 91a of the microcomputer 91 (four in the example of FIG. 4).

Next, the operation of the electric steering lock device 1 of the first embodiment will be described.
FIG. 5 is a flowchart showing an operation flow when the unlock control of the electric steering lock device of the first embodiment is performed.
FIG. 6 is a timing chart showing the relationship of the operation of each part when performing unlock control of the electric steering lock device of the first embodiment.

  When the operation is started, in step (hereinafter simply referred to as S) 101, the host ECU 100 transmits a power supply permission signal to the power supply control unit 93, whereby power is supplied from the power source 200 to the microcomputer 91 (in FIG. 6). (See T100).

  In S102, the current consumption setting unit 91b of the microcomputer 91 sets the output level of the unused terminal 91a to a high level (see T100 in FIG. 6).

  In S103, the microcomputer 91 sets the unused terminal 91a to the output mode (see T100 in FIG. 6). Thereby, normally, the output level of the unused terminal 91a of the microcomputer 91 can be set to an output level with low current consumption. Therefore, even if the power supply is temporarily cut off, the time for discharging electric charges from the first capacitor 95 and the second capacitor 96 can be lengthened, and the instantaneous interruption resistance can be maintained.

  In S104, the microcomputer 91 continues this determination until receiving the unlock drive request signal while determining whether or not the unlock drive request signal has been received from the host ECU 100. When the host ECU 100 transmits an unlock drive request signal to the microcomputer 91 via communication (see T101 in FIG. 6), the process proceeds to the next S105.

  When receiving the unlock drive request signal from the host ECU 100, the microcomputer 91 starts unlock drive control in S105 (see T102 in FIG. 6). In this flow, the case of the unlock drive control is described. However, in the case of the lock drive control, the lock drive control is started when the lock drive request signal is similarly received.

  In S106, the microcomputer 91 continues this determination until the unlock drive control ends while determining whether the unlock drive control ends. When the unlock drive control is completed, the process proceeds to S107.

  In S107, the microcomputer 91 recognizes that the unlock drive control has ended.

  When the unlocking drive control is completed (recognized that it has been completed), the current consumption setting unit 91b of the microcomputer 91 sets the output level of the unused terminal 91a to a low level in S108 (see T103 in FIG. 6). . In this way, at this timing when power supply to the microcomputer 91 becomes unnecessary, the current consumption setting unit 91b of the microcomputer 91 increases the current consumption compared to the current consumption at the high level output level before this time. The output of the unused terminal 91a is set to the level. Thereby, after the power supply to the microcomputer 91 is cut off, it is possible to shorten the time during which the charges of the first capacitor 95 and the second capacitor 96 are released.

  When the unlock drive control ends, the microcomputer 91 notifies the host ECU 100 that the unlock drive control has ended via communication (see T104 in FIG. 6).

In S110, when ECU 100 receives a notification that driving has ended, the ECU 100 cuts off the power supply to the microcomputer 91 (see T105 in FIG. 6).
When the power supply to the microcomputer 91 is cut off, the charges accumulated in the first capacitor 95 and the second capacitor 96 are rapidly discharged by the action of the pull-up resistor 98 (see T106 in FIG. 6). .
Then, when the electric charge accumulated in the first capacitor 95 and the second capacitor 96 is discharged until the microcomputer 91 cannot supply the operable power to the microcomputer 91, the microcomputer 91 stops (in FIG. 6). T107).

  In the above description, the unlock drive control has been mainly described, but the same applies to the lock drive control.

  As described above, according to the first embodiment, during normal times, the power level is temporarily shut down by setting the output level of the unused terminal 91a of the microcomputer 91 to an output level with low current consumption. Even if this is the case, it is possible to extend the time during which charges are discharged from the first capacitor 95 and the second capacitor 96, and to maintain the instantaneous interruption resistance. Then, at a timing when predetermined processing (unlock drive control or lock drive control) ends and power supply to the microcomputer 91 becomes unnecessary, the microcomputer 91 brings the unused terminal 91a to an output level at which the consumption current increases. By setting, after the power supply to the microcomputer 91 is cut off, the time for discharging the charges of the first capacitor 95 and the second capacitor 96 can be shortened. Therefore, it is possible to maintain the instantaneous interruption resistance at a high level in a normal state and stop the microcomputer 91 quickly after the power supply to the microcomputer 91 is cut off, thereby speeding up the engine start with improved safety. it can.

  Further, the timing at which the power supply to the microcomputer 91 becomes unnecessary is when the unlock drive control or the lock drive control is finished, so that the microcomputer 91 can be stopped quickly after the power supply is cut off. it can.

(Second Embodiment)
FIG. 7 is a flowchart showing an operation flow when the unlock control of the electric steering lock device of the second embodiment is performed.
FIG. 8 is a timing chart showing the relationship of the operation of each part when performing unlock control of the electric steering lock device of the second embodiment.
The electric steering lock device of the second embodiment has the same configuration as the electric steering lock device of the first embodiment except that the operations of the microcomputer 91 and the host ECU 100 are partially different. Therefore, the same reference numerals are given to the portions that perform the same functions as those in the first embodiment described above, and repeated descriptions are omitted as appropriate.

  In the electric steering lock device of the second embodiment, the operation when the power supply to the microcomputer 91 is interrupted is different from that of the first embodiment. The operation of the electric steering lock device according to the second embodiment will be described focusing on this point.

  When the operation starts, in S201, the host ECU 100 transmits a power supply permission signal to the power supply control unit 93, whereby power is supplied from the power source 200 to the microcomputer 91 (see T200 in FIG. 8).

  In S202, the current consumption setting unit 91b of the microcomputer 91 sets the output level of the unused terminal 91a to a high level (see T200 in FIG. 8).

  In S203, the microcomputer 91 sets the unused terminal 91a to the output mode (see T200 in FIG. 8). Thereby, normally, the output level of the unused terminal 91a of the microcomputer 91 can be set to an output level with low current consumption. Therefore, even if the power supply is temporarily cut off, the time for discharging electric charges from the first capacitor 95 and the second capacitor 96 can be lengthened, and the instantaneous interruption resistance can be maintained.

  In S204, the microcomputer 91 continues this determination until receiving the unlock drive request signal while determining whether or not the unlock drive request signal has been received from the host ECU 100. Here, when the host ECU 100 transmits an unlock drive request signal to the microcomputer 91 via communication (see T201 in FIG. 8), the process proceeds to the next S205.

  When the microcomputer 91 receives the unlock drive request signal from the host ECU 100, the microcomputer 91 starts unlock drive control in S205 (see T202 in FIG. 8). In this flow, the case of the unlock drive control is described. However, in the case of the lock drive control, the lock drive control is started when the lock drive request signal is similarly received.

  In S206, the microcomputer 91 continues this determination until the unlock drive control ends while determining whether the unlock drive control ends. When the unlock drive control ends, the process proceeds to S207.

  When the unlock drive control is finished, in S207, the microcomputer 91 notifies the host ECU 100 that the unlock drive control is finished (see T203 in FIG. 8).

  When the host ECU 100 receives the notification that the driving has been completed, the host ECU 100 transmits a cutoff notification signal to the microcomputer 91 via communication (see T204 in FIG. 8).

  When the current consumption setting unit 91b of the microcomputer 91 receives the shutoff notification signal from the host ECU 100, the current consumption setting unit 91b sets the output level of the unused terminal 91a to a low level in S209 (see T205 in FIG. 8). In this way, at this timing when power supply to the microcomputer 91 becomes unnecessary, the current consumption setting unit 91b of the microcomputer 91 increases the current consumption compared to the current consumption at the high level output level before this time. The output of the unused terminal 91a is set to the level. Thereby, after the power supply to the microcomputer 91 is cut off, it is possible to shorten the time during which the charges of the first capacitor 95 and the second capacitor 96 are released.

In S210, the host ECU 100 cuts off the power supply to the microcomputer 91 (see T206 in FIG. 8).
When the power supply to the microcomputer 91 is cut off, the charges accumulated in the first capacitor 95 and the second capacitor 96 are rapidly discharged by the action of the pull-up resistor 98 (see T207 in FIG. 8). .
Then, when the electric charge accumulated in the first capacitor 95 and the second capacitor 96 is discharged until the microcomputer 91 cannot supply the operable power to the microcomputer 91, the microcomputer 91 stops (in FIG. 8). T208).

  As described above, according to the second embodiment, the cutoff notification signal for notifying in advance that the microcomputer 91 shuts off the power feeding path is received from the host ECU 100 when the power supply to the microcomputer 91 becomes unnecessary. Sometimes. Thereby, the electric steering lock device of the second embodiment can stop the microcomputer 91 quickly after the power supply is cut off.

Further, since the microcomputer 91 performs control in accordance with a command from the host ECU 100, the control timing can be easily adjusted, and the processing of the microcomputer 91 itself can be simplified.
More specifically, even if the microcomputer 91 switches the output level in order to discharge the charge of the first capacitor 95 and the second capacitor 96, the charge is not discharged when the power supply voltage is supplied from the host ECU 100. Therefore, in order to quickly discharge the electric charge, it is necessary to quickly cut off the power supply voltage after switching the output level. In the second embodiment, since the microcomputer 91 switches the output level in response to the command signal from the host ECU 100, the adjustment of the output level switching timing of the microcomputer of the electric steering lock device and the power shut-off timing of the host ECU can be adjusted. This makes it easy to eliminate timing deviation as much as possible. Moreover, since the microcomputer 91 should just control according to the instruction | command of high-order ECU100, the process, ie, a program, can be simplified.

(Third embodiment)
FIG. 9 is a control system configuration diagram of the electric steering lock device of the third embodiment.
In the electric steering lock device 3 of the third embodiment, the pull-down resistor 99 is connected to the unused terminal 91a, and the operation of the microcomputer 91 is partially different in relation to this, except for the operation of the first embodiment. It has the same form as the electric steering lock device 1. Therefore, the same reference numerals are given to the portions that perform the same functions as those in the first embodiment described above, and repeated descriptions are omitted as appropriate.

A pull-down resistor 99 is connected to the unused terminal 91a of the microcomputer 91 of the third embodiment. About another structure, it is the same as that of 1st Embodiment.
In the third embodiment, as described above, since the pull-down resistor 99 is connected to the unused terminal 91a, the output level of the unused terminal 91a is set to a low level during normal operation. Then, at the timing when the unlock drive control state is not driven, the current consumption setting unit 91b changes the output level of the unused terminal 91a to a high level and sets the current consumption to increase.

  With the above configuration, the electric steering lock device 3 according to the third embodiment can obtain the same operations and effects as those of the first embodiment using the pull-down resistor 99.

(Deformation)
The present invention is not limited to the embodiment described above, and various modifications and changes are possible, and these are also within the scope of the present invention.

  For example, in the second embodiment, similarly to the third embodiment, a pull-down resistor may be connected to the unused terminal 91a.

  Moreover, in each embodiment, the example provided with the 1st capacitor | condenser 95 and the 2nd capacitor | condenser 96 was demonstrated and demonstrated. Not limited to this, the number and position of the capacitors may be changed as appropriate.

  Furthermore, in each embodiment, the unlock drive control or the lock drive control is not limited to the operation of the lock bolt. For example, a failure diagnosis of a motor drive circuit or the like, storage of control information in a nonvolatile memory, etc. The processing performed before and after the bolt unlocking drive control or lock driving control may also be performed as part of the unlock driving control or lock driving control. In other words, the current consumption setting unit may operate by assuming that the unlock drive control or the lock drive control is completed upon completion of the processes performed before or after the unlock drive control or the lock drive control. Thereby, the electric steering lock device can complete the control of the microcomputer normally, and can shorten the time until the microcomputer stops.

  The first embodiment to the third embodiment and modified embodiments can be used in appropriate combination, but detailed description thereof is omitted. Further, the present invention is not limited by the embodiments described above.

DESCRIPTION OF SYMBOLS 1,3 Electric steering lock apparatus 10 Case 10a Recess 10b Connector arrangement | positioning part 10c Pin hole 10d Lock bolt insertion hole 10e Engaging groove 10f Lock member accommodating part 10g Board | substrate accommodating part 10h Communication part 11 Pin 20 Lid 21 Pin fastening part 21a Pin Insertion hole 22 Gear holding cylinder part 23 Spring support 30 Lock unit 31 Lock bolt 31a Long hole 32 Driver 32a Male thread part 32b Pin insertion hole 32c Non-rotation part 32d Arm 32e Magnet storage part 32f Partition 33 Magnet 34 Pin 40 Gear member 40a Worm Wheel 40b Female thread 51 Spring 52 Spring 61 Electric motor 61a Output shaft 62 Worm gear 70 Substrate 71 Motor feed terminal 72 First magnetic sensor 73 Second magnetic sensor 80 Connector 91 Microcomputer 91a Unused terminal 91b Current consumption setting unit 92 Communication circuit 93 Power supply control unit 94 Constant voltage circuit 95 First capacitor 96 Second capacitor 97 Motor drive control unit 98 Pull-up resistor 99 Pull-down resistor 100 Host ECU
200 Power supply L Power supply path

Claims (3)

A lock member movable between a lock position that engages with a steering shaft of a vehicle and an unlock position that releases the engagement;
A drive mechanism for moving the lock member;
A motor for operating the drive mechanism;
Executes the unlock drive control for controlling the motor to move the lock member to the unlock position or the lock drive control for controlling the motor to move the lock member to the lock position. An unused terminal that is not used for control is connected to a pull-up resistor or a pull-down resistor, and the microcomputer sets the unused terminal to an output mode;
A power supply path for supplying power from a power source to the microcomputer;
A host ECU that controls conduction and interruption of the power supply path, and controls the operation of the microcomputer via communication;
In the electric steering lock device with
In the microcomputer, the output level of the unused terminal is normally set to an output level with low current consumption corresponding to the connected pull-up resistor or pull-down resistor, and the host ECU sends the microcomputer to the microcomputer. At a predetermined timing before the power supply path is cut off, the output level of the unused terminal is set to an output level at which current consumption increases in correspondence with the connected pull-up resistor or pull-down resistor. Having a current setting unit;
An electric steering lock device. In the electric steering lock device according to claim 1,
The predetermined timing is when the unlock drive control or lock drive control that has been executed is completed;
An electric steering lock device. In the electric steering lock device according to claim 1,
The predetermined timing is when the microcomputer receives a cutoff notification signal that notifies in advance that the power supply path is cut off from the host ECU.
An electric steering lock device.

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