JP3555341B2 - Power window device - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a power window device having an anti-jamming function.
[0002]
[Prior art]
2. Description of the Related Art In recent years, a power window device of a vehicle includes a unit for detecting whether a foreign object such as a human body is caught between a window glass (window glass) and a window frame, and closes the window glass on a closing side (upside: When a foreign object is detected during the control of (up), the control with the anti-trapping function, such as immediately stopping the closing control of the window glass and switching to the opening (downward: down) control, is put into practical use. Have been.
[0003]
As a power window device of this type, for example, Japanese Patent Application Laid-Open No. 7-4137 discloses a motor that opens and closes a window glass while attaching a pressure-sensitive sensor to an upper edge of a window frame to detect contact of a foreign object. The drive current of a so-called power window motor is monitored, and when a pressure sensor detects contact of a foreign object with the window frame and the drive current of the motor reaches a predetermined set value, a pinch occurs. It has been proposed that a configuration be made so as to detect the following.
[0004]
According to this device, the pressure-sensitive sensor reacts only when a foreign object is really caught between the window glass and the window frame, and the load applied to the window glass increases, so that the driving current of the motor increases. In addition, it is possible to accurately detect that pinching has occurred.
[0005]
[Problems to be solved by the invention]
However, in the above-described conventional apparatus, the occurrence of the entrapment can be detected only after the foreign matter is interposed between the window glass and the window frame. Therefore, in the above-described conventional device, for example, even when the occupant of the vehicle is about to be caught in the window glass, even if the window glass is strongly pressed, until a part of the body or the like touches the pressure-sensitive sensor on the window frame side, The windowpane could not be flipped to the open side.
[0006]
In addition, in vehicles, a visor for avoiding rain (so-called side window visor) is often mounted on the window frame, and usually, the tip (lower end) of this type of visor is the tip (upper end) of the window glass rather than the window frame. Since it protrudes to the side, a foreign substance such as a human body may be pinched between the visor and the window glass. When a foreign object is caught between the visor and the window glass, the foreign object may not come into contact with the pressure-sensitive sensor. It cannot be detected.
[0007]
The present invention has been made in view of such a problem, and an object of the present invention is to provide a power window device that can reliably detect an entrapment that has occurred in any state and perform an operation for preventing the entrapment.
[0008]
Means for Solving the Problems and Effects of the Invention
In the power window device according to the first aspect of the present invention, the foreign object detecting means detects whether or not the foreign object has contacted the edge of the window frame on the side where the window glass is closed. Then, the first load detecting means detects whether the load applied to the window glass has reached a first predetermined value. Further, the second load detecting means detects whether the load applied to the window glass has reached a second predetermined value set to a value larger than the first predetermined value, and It is detected whether or not the tip of the glass is located on the opening side of a predetermined boundary position set before the fully closed position.
[0009]
In the power window device according to the present invention, the contact of the foreign matter is detected by the foreign matter detecting means, and the load applied to the window glass reaches the first predetermined value by the first load detecting means. Or the position detecting means detects that the tip of the window glass is located on the opening side of the boundary position, and the load applied to the window glass by the second load detecting means is the second predetermined value. When it is detected that the value has been reached, it is detected that a foreign object has been caught between the window glass and the window frame. When the power window device detects that a foreign object is caught as described above while controlling the window glass to the closing side, the power window device controls the window glass to the opening side to prevent the foreign object from being caught.
[0010]
That is, in the power window device according to the first aspect, "a foreign object abuts on the edge of the window frame on the side where the window glass is closed, and the load applied to the window glass reaches the first predetermined value." The detection condition (hereinafter, referred to as a first detection condition) is described as follows: "The tip of the window glass is located on the opening side of a boundary position set before the fully closed position, and the load applied to the window glass is equal to the load applied to the window glass. Reaches a second predetermined value larger than the predetermined value of 1 ”(hereinafter referred to as“ second detection condition ”), a foreign object is interposed between the window glass and the window frame. Is detected.
[0011]
According to the power window device of the first aspect, the foreign object detection unit detects that the foreign object has come into contact with the edge of the window frame on the side where the window glass is closed, and the first window. When the load detecting means detects that the load applied to the window glass has reached the first predetermined value (that is, when the first detection condition is satisfied), it is detected that a foreign object has been caught. In the case where the foreign object is caught in the window glass in a state where the foreign object is in contact with the edge of the window frame, it is possible to quickly detect the occurrence of the entrapment.
[0012]
In other words, in the first detection condition, even if only the edge of the window frame is touched due to the mischief, or if only the load applied to the window glass is increased due to the temporal change or temperature change of the window frame, the pinch does not occur. Because the detection sensitivity of the foreign object detecting means is increased and the first predetermined value is set to a value as small as possible, the sensitivity of the pinch detection can be made extremely sensitive, as a result. When a foreign object is caught between the window glass and the window frame, the occurrence of the pinch can be detected at an early stage when the load between the window glass and the window frame is extremely small.
[0013]
Further, in the power window device according to the first aspect, the position detecting unit detects that the front end of the window glass is located closer to the opening side than the boundary position set before the fully closed position, Also, when the second load detecting means detects that the load applied to the window glass has reached the second predetermined value (that is, even when the second detection condition is satisfied), it is determined that the foreign matter has been caught. Since the detection is performed, even if the foreign matter does not contact the edge of the window frame, the tip of the window glass is located on the opening side from the boundary position, and the window glass has the first predetermined position. If a load equal to or greater than a second predetermined value greater than the value is applied, it can be detected that the entrapment has occurred.
[0014]
Therefore, according to the power window device of the first aspect, for example, when the occupant of the vehicle is about to be pinched by the window glass, if the window glass is strongly pressed, it can be detected that the pinching has occurred. As a result, before the human body or the like is actually sandwiched between the windowpane and the window frame, the windowpane can be flipped to the open side, and safety can be improved. Further, when a visor for avoiding rain (side window visor) is mounted on the window frame, and a foreign matter is caught between the visor and the window glass, the load applied to the window glass is the second predetermined value. According to the above, it is possible to detect that the entrapment has occurred and control the inversion of the window glass to the opening side.
[0015]
As described above, according to the power window device of the first aspect, it is possible to reliably detect the entrapment that has occurred in any state and perform an operation for preventing the entrapment.
Here, the second predetermined value in the second detection condition is set to a value larger than the first predetermined value in the first detection condition for the following reason.
[0016]
In other words, under the first detection condition, it is not detected that the entrapment has occurred unless the foreign object detection unit detects the contact of the foreign object. Therefore, even if the first predetermined value is set to a value as small as possible, the detection sensitivity is increased. Therefore, it is not possible to erroneously detect that the entrapment has occurred. On the other hand, in the second detection condition, the presence / absence of entrapment is detected based only on the load applied to the window glass. Therefore, there is a possibility that the load applied to the window glass may be erroneously detected when the load applied to the window glass fluctuates due to a temporal change of the window frame. Therefore, in order to prevent such erroneous detection, the second predetermined value is set to a value larger than the first predetermined value to lower the detection sensitivity (make it insensitive). By setting as described above, it is possible to detect the entrapment without the foreign matter coming into contact with the edge of the window frame and to prevent erroneous detection.
[0017]
On the other hand, in the second detection condition, when the tip of the window glass is not located on the opening side of the boundary position set before the fully closed position, that is, when the tip of the window glass is located between the boundary position and the fully closed position. (Hereinafter, this area is referred to as “non-detection area”) and the window glass is about to close, even if the load applied to the window glass reaches the second predetermined value, The detection of the occurrence of the error is not performed for the following reason.
[0018]
That is, regardless of the position of the tip of the window glass, if the configuration is such that the presence or absence of entrapment is determined only by the magnitude of the load applied to the window glass, it is applied to the window glass even when the window glass is fully closed in a normal state. This is because, since the load increases, it is erroneously detected that the entrapment has occurred, and the normally closed window glass is inverted and controlled to open. Therefore, in the second detection condition, only when the tip of the window glass is located on the opening side of the boundary position set before the fully closed position (in other words, when the tip of the window glass is in the non-detection area). Only when the window glass is located outside, the presence or absence of entrapment is detected based on the load applied to the windowpane, and the detection of entrapment is not performed when the tip of the windowpane enters the non-detection area.
[0019]
According to the power window device of the first aspect, the detection accuracy of the position detection means, that is, the detection accuracy of whether or not the front end of the window glass is located on the opening side of the boundary position is so high. Thus, the above-described effect of reliably detecting the entrapment that has occurred in any state can be obtained without the necessity of performing the operation.
[0020]
In other words, even if the presence / absence of entrapment is detected only based on whether or not the second detection condition is satisfied, instead of the logical sum of the first detection condition and the above-described first detection condition, foreign matter may hit the edge of the window frame. It becomes possible to detect the occurrence of pinching regardless of whether or not they are touched.
However, in such a configuration, since the presence or absence of entrapment is detected only by the magnitude of the load applied to the window glass, it is ensured that a foreign object is interposed between the window glass and the window frame. In order to perform detection, it is necessary to make the non-detection area extremely narrow. For this purpose, the boundary position is set as close as possible to the fully closed position, and if the arrival of the tip of the window glass at the boundary position is not detected with high accuracy, the window is normally closed. It is impossible to achieve both the prevention of the reversal control of the windowpane from being opened to the open side and the reliable detection of the presence or absence of the pinch.
[0021]
On the other hand, in the power window device according to the first aspect, as described above, the presence or absence of the pinch is detected by the logical sum of the first detection condition and the second detection condition. In the worst case, it can be reliably detected that a foreign substance is caught between the window frame and the first detection condition is satisfied. It is only necessary to be able to identify whether or not the tip has almost reached the fully closed position.
[0022]
As described above, according to the power window device of the first aspect, the effect of reliably detecting the entrapment that has occurred in any state can be realized with a simple configuration without having to perform highly accurate position detection of the window glass. You can.
Incidentally, the first load detecting means and the second load detecting means can be configured as described in claim 2.
[0023]
In other words, in the power window device according to the second aspect, the first load detecting means and the second load detecting means determine a load applied to the window glass based on a driving current or a rotation speed of a power window motor for opening and closing the window glass. Is configured to detect whether or not has reached each of the predetermined values (the first predetermined value or the second predetermined value).
[0024]
According to the power window device of the second aspect, the first and second load detecting means can be simply configured, and further, the effect of the power window device of the first aspect can be reduced. It can be obtained with a simple configuration.
On the other hand, when a visor for avoiding rain is attached to the window frame so as to extend toward the front end side of the window glass, the boundary position is changed from the front end position of the visor to the window glass. May be set within the range up to the fully closed position. That is, if the boundary position is set within the range from the tip position of the visor to the fully closed position of the window glass as described in claim 3, when a foreign object is sandwiched between the visor and the window glass, Can detect the occurrence of entrapment when the second detection condition is satisfied, and can detect the occurrence of entrapment by satisfying the first detection condition when a foreign object is interposed between the window frame and the window glass.
[0025]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments to which the present invention is applied will be described with reference to the drawings. It is needless to say that the embodiments of the present invention are not limited to the following examples, and can take various forms as long as they belong to the technical scope of the present invention.
[0026]
First, FIG. 1 is a configuration diagram illustrating a configuration of a power window device of an embodiment that controls opening and closing (elevation) of a window glass of a vehicle.
The power window device of the present embodiment includes a well-known window regulator 2 provided in a door D of a vehicle for opening and closing a window glass W, and a power window motor (hereinafter simply referred to as a motor) 4 for operating the window regulator 2. A control device 6 for controlling the opening and closing of the window glass W by driving the motor 4 forward and backward, and a belt-shaped pressure-sensitive sensor S attached to the upper edge of the window frame on which the window glass W is opened and closed. I have.
[0027]
Although only one motor 4 is shown in FIG. 1, it is actually provided at each door D of the vehicle. The control device 6 includes an up switch (that is, a switch for closing the window glass W) and a down switch (that is, a window glass) that are arranged in a well-known power window switch unit (not shown) operated by an occupant of the vehicle. The window glass W of each door is opened and closed by driving the motor 4 of each door D to rotate forward and backward in response to a switch signal from a switch for opening W). Only the control for D will be described.
[0028]
Here, the pressure-sensitive sensor S is formed by molding a pair of conductors formed in a belt shape and opposed to each other with a rubber material containing, for example, carbon or the like. Is configured to decrease. As shown in FIG. 2, the pressure-sensitive sensor S is mounted along the indoor side of a sash 8 that forms a window frame of the vehicle and holds a waterproof weatherstrip 7. As a result, as illustrated in FIG. 4A, when a foreign substance F such as a human body is sandwiched between the window glass W and the window frame (sash 8), the foreign substance F comes into contact with the pressure-sensitive sensor S. Pressure will be applied. As shown in FIGS. 2 and 4, in this embodiment, a side window visor (hereinafter simply referred to as a visor) 9 for avoiding rain is attached to the window frame (more specifically, the outside of the sash 8). ing.
[0029]
1, the ends of both conductors of the pressure-sensitive sensor S are connected to the control device 6. Then, inside the control device 6, one conductor of the pressure-sensitive sensor S is pulled up to a predetermined power supply voltage VDD by the resistor 10, and the other conductor is connected to the ground potential.
[0030]
Therefore, of the two conductors of the pressure-sensitive sensor S, the voltage of the conductor pulled up by the resistor 10 divides the power supply voltage VDD by the resistance value of the resistor 10 and the resistance value between the two conductors. This value changes to a smaller value as the pressure applied to the pressure-sensitive sensor S increases and the resistance value between the two conductors decreases.
[0031]
On the other hand, the control device 6 includes a microcomputer (hereinafter, referred to as a CPU) 12 for performing various processes for controlling the window glass W, a signal (UP / SW signal) from the up switch, and a signal from the down switch. An input circuit 16 for inputting to the CPU 12 a signal (DOWN SW signal), a signal (position sensor signal) from a position sensor 14 provided in the window regulator 2 for detecting the open / close position of the window glass W, and the like. , Two relays RLY1 and RLY2 as a drive circuit for driving the motor 4 to rotate forward and backward in response to a drive command from the CPU 12, and a resistor for detecting a drive current IM supplied to the motor 4 by the relays RLY1 and RLY2. Vessel 18.
[0032]
That is, when the CPU 12 outputs a drive command for opening the window glass W, one terminal (the upper terminal in FIG. 1) of the motor 4 is driven by one of the relays RLY1 and RLY2. And the other terminal (lower terminal in FIG. 1) of the motor 4 is connected to the ground potential via the resistor 18 by the other relay RLY2. , A drive current IM flows from the relay RLY1 side to the RLY2 side via the resistor 18, and the motor 4 rotates in a direction to open the window glass W.
[0033]
Conversely, when the CPU 12 outputs a drive command for closing the window glass W, the lower terminal of the motor 4 in FIG. 1 is connected to the battery voltage VB of the vehicle by the relay RLY2 and the relay RLY1. As a result, the upper terminal of the motor 4 in FIG. 1 is connected to the ground potential via the resistor 18, and as a result, the motor 4 is supplied with the driving current IM from the relay RLY2 to the RLY1 via the resistor 18. The motor 4 rotates in a direction to close the window glass W. When the window glass W is not opened and closed, both terminals of the motor 4 are connected to the ground potential via the resistor 18 by the relays RLY1 and RLY2, so that the battery voltage VB is not applied to the motor 4. ing.
[0034]
Therefore, in the control device 6, the voltage generated at the end of the resistor 18 opposite to the ground potential is proportional to the drive current IM of the motor 4, and the drive current IM of the motor 4 is As the load applied to the window glass W increases, the voltage generated in the resistor 18 is output as the motor drive current signal VI corresponding to the load applied to the window glass W.
[0035]
Further, the control device 6 compares the voltage of one of the two conductors of the pressure-sensitive sensor S which is pulled up by the resistor 10 with a preset reference voltage Vref (<VDD). And an A / D converter 20 that converts the motor drive current signal VI generated in the resistor 18 into a digital signal and outputs the digital signal to the CPU 12.
[0036]
The position sensor 14 is a switch that is turned on / off in accordance with the amount of operation of the window regulator 2, and the upper end of the window glass W is set at the tip (lower end) position of the visor 9 as shown by the dashed line in FIG. A region above the determined boundary position (that is, a region corresponding to the above-described non-detection region from the boundary position indicated by the one-dot chain line in FIG. 2 to the fully closed position of the window glass W). (The upper edge area)).
[0037]
In the power window device of the present embodiment configured as described above, the CPU 12 in the control device 6 controls the opening and closing of the window glass W by executing the control processing shown in FIG. This control process is started when an ignition switch (not shown) of the vehicle is turned on.
[0038]
As shown in FIG. 3, when the CPU 12 starts execution of the control processing, first, in step (hereinafter simply referred to as “S”) 110, an initialization processing for initializing various internal data is executed.
Then, in S120, it is determined whether or not the down switch (DOWN SW) is turned on. If the down switch is not turned on, in S130, the up switch (UP SW) is set. Is determined to be ON, and if the up switch is not ON, the process proceeds to S140, and the motor 4 is stopped. Therefore, in this state, the raising / lowering (opening / closing) of the window glass W is stopped.
[0039]
On the other hand, if it is determined in S120 that the down switch is ON, the process proceeds to S150, in which the motor 4 is driven to lower the window glass W (open). Then, in S160, the voltage value of the motor drive current signal VI is detected via the A / D converter 20, and in S170, the motor 4 is detected based on the voltage value of the motor drive current signal VI detected in S160. It is determined whether or not the drive current IM has reached the lock current. The lock current corresponds to the drive current IM when the load applied to the window glass W increases and the rotation of the motor 4 stops.
[0040]
If it is determined in S170 that the drive current IM has not reached the lock current, the process returns to S120 described above. If it is determined in S170 that the drive current IM has reached the lock current, the window glass W Is determined to have completely opened and stopped, the process proceeds to S180, and after the driving of the motor 4 is stopped, the process returns to S120.
[0041]
On the other hand, if it is determined in S130 that the up switch is ON, the process proceeds to S190, in which the motor 4 is driven to rotate in the opposite direction to that in S150, and the window glass W is raised. (Close). Then, in S200, the voltage value of the motor drive current signal VI is detected via the A / D converter 20.
[0042]
Here, when raising the window glass W, since there is a possibility that a human body or the like is pinched between the window glass W and the window frame, processing for detecting and preventing pinching in steps S210 to S250 is particularly executed. .
That is, first, in S210, the on / off state of the position sensor 14 is detected to determine whether or not the upper end of the window glass W is outside the above-described upper end region (see FIG. 2). If it is determined that the upper end of the window glass W is outside the upper end region, the process proceeds to S220, and the voltage value of the motor drive current signal VI detected in S200 is set to the predetermined insensitivity determination value. A process as a second load detecting means for determining whether or not Thd or more (VI ≧ Thd) is executed. The insensitivity determination value Thd is larger than the voltage value of the motor drive current signal VI when the window glass W is normally opened and closed, and is smaller than the voltage value of the motor drive current signal VI when the motor 4 is locked. It is set to a small value.
[0043]
If it is determined in step S220 that the voltage value of the motor drive current signal VI is equal to or greater than the insensitivity determination value Thd, the process advances to step S230 to determine that a foreign object such as a human body has been caught between the window glass W and the window frame. Then, the window glass W is lowered for a predetermined time by rotating the motor 4 in the reverse direction, and thereafter, the process returns to S120 described above.
[0044]
Further, in S210, when it is determined that the upper end of the window glass W is not outside the upper end region (that is, in the upper end region), or in S220, the voltage value of the motor drive current signal VI is the insensitivity determination value. If it is determined that it is not equal to or greater than Thd, the process proceeds to S240, and a process is performed as a foreign object detection unit that determines whether or not a foreign object has contacted the window frame based on the output of the pressure sensor S. In S240, the voltage of one of the conductors of the pressure-sensitive sensor S which is pulled up by the resistor 10 becomes smaller than the reference voltage Vref, and the output of the comparator CMP changes from the low level to the high level. Then, it is determined that the foreign matter has contacted the window frame.
[0045]
If it is determined that the foreign matter has come into contact with the window frame, the process proceeds to S250, where the voltage value of the motor drive current signal VI detected in S200 is the motor drive current when the window glass W is normally opened and closed. A process as first load detection means for determining whether or not a sensitivity determination value Thb set to a value greater than the voltage value of the signal VI and smaller than the insensitivity determination value Thd (VI ≧ Thb). Is executed, and if it is equal to or greater than the sensitive determination value Thb, the process proceeds to S230, and it is determined that a foreign object such as a human body has been caught between the window glass W and the window frame, as in the case of an affirmative determination in S220. Then, the window glass W is lowered for a predetermined time by rotating the motor 4 in the reverse direction, and then the process returns to S120.
[0046]
On the other hand, in S240, when it is not determined that the foreign matter has contacted the window frame, or in S250, the voltage value of the motor drive current signal VI is not more than the sensitivity determination value Thb (that is, the sensitivity determination value Thb If it is determined to be smaller than that, it is determined that no entrapment has occurred, and the flow shifts to S170 described above. Then, similarly to the case where the window glass W is opened, it is determined whether or not the drive current IM of the motor 4 has reached the lock current based on the voltage value of the motor drive current signal VI detected in S200. If not, the process returns to S120 (S170: NO). If the lock current has been reached, it is determined that the window glass W has been completely closed, and the driving of the motor 4 is stopped (S170: YES, S180).
[0047]
That is, in this control process, the window glass W is opened (down: down) or closed (up: up) in response to the switch signal input via the input circuit 16 (S120 to S200), and the window glass W is opened. When the glass W is being closed, the processes of S210 to S250 are executed to detect and prevent the entrapment.
[0048]
In particular, in the processing of 210 to S250, “regardless of the upper end position of the window glass W, it is detected that a foreign object has contacted the upper edge of the window frame (S240: YES), and the load applied to the window glass W is reduced. When it is determined that the voltage value of the motor drive current signal VI has become greater than or equal to the sensitivity determination value Thb (S250: YES), or "it is detected that the upper end of the window glass W is outside the upper end region (S210: YES), and when it is determined that the voltage value of the motor drive current signal VI is equal to or greater than the insensitivity determination value Thd which is a value greater than the sensitivity determination value Thb (S220: YES), " It is determined that a foreign matter is caught in the window glass W, and the window glass W is lowered for a predetermined time (S230).
[0049]
According to such a power window device of this embodiment, as shown in FIG. 4A, when a foreign substance F such as a human body is sandwiched between the window glass W and the window frame (sash 8). Can quickly detect that pinching has occurred.
That is, in the determinations of S240 and S250 in the control process (FIG. 3), only the pressure-sensitive sensor S is touched due to mischief or the like, or only the load applied to the window glass W due to a temporal change or a temperature change of the window frame. Even if is large, it is not erroneously determined that the entrapment has occurred. Therefore, the reference voltage Vref of the comparator CMP is set to a large value to increase the sensitivity of the foreign object detection, and the sensitivity determination value Thb is set to a value as small as possible. By setting this, it is possible to make the sensitivity of entrapment detection extremely sensitive. As a result, when the foreign matter F is interposed between the windowpane W and the window frame as shown in FIG. The occurrence of entrapment can be detected at an early stage when the load between the frame and the window frame is extremely small.
[0050]
Further, according to the power window device of the present embodiment, since it is determined whether or not a foreign object is caught by the determinations in S210 and S220 of the control process, the foreign object does not contact the window frame. However, (in other words, even if the pressure-sensitive sensor S does not react), the upper end of the window glass W is outside the upper end region, and the load applied to the window glass W increases, so that the voltage of the motor drive current signal VI If the value reaches the insensitivity determination value Thd, it can be detected that the entrapment has occurred.
[0051]
Therefore, as illustrated in FIG. 4B, even when the foreign matter F is interposed between the visor 9 mounted on the window frame and the window glass W and the pressure-sensitive sensor S does not respond, the entrapment is performed. Is detected, the window glass W can be controlled to be turned to the open side.
Further, for example, when the occupant of the vehicle is about to be pinched by the window glass W, if the window glass W is strongly pressed, it can be detected that pinching has occurred. As a result, before the human body or the like is actually sandwiched between the window glass W and the window frame, the window glass W can be flipped to the open side and the safety can be improved.
[0052]
As described above, according to the power window device of the present embodiment, it is possible to reliably detect the entrapment that has occurred in any state and perform the operation of preventing the entrapment.
Then, in the power window device of the present embodiment, the insensitivity determination value Thd to be compared with the voltage value of the motor drive current signal VI in S220 of the control processing is set to a value larger than the sensitive determination value Thb used in S250. And the sensitivity of the pinch detection by the determination processing of S220 is reduced. Accordingly, it is possible to achieve a high level of compatibility between the detection of entrapment without foreign matter contacting the window frame and the prevention of erroneous detection.
[0053]
Moreover, according to the power window device of the present embodiment, the detection accuracy of the position sensor 14 (that is, the detection accuracy of whether or not the upper end of the window glass W is outside the upper end region) does not need to be so high, and the power window device is described above. Each effect can be obtained.
That is, first, in the control process of FIG. 3, if the configuration is such that the determination of S220 is always performed without performing the determination of the position of the window glass W in S210, even when the window glass W is normally closed, Since the load applied to W increases and the voltage value of the motor drive current signal VI rises, it is erroneously detected that the entrapment has occurred, and the closed window glass W is inverted and controlled to open. Therefore, in the control process, the presence or absence of the pinch is determined by the determination in S220 only when the upper end of the window glass W is located outside the upper end region by the process in S210.
[0054]
On the other hand, even if the presence / absence of entrapment is determined only by the determination processing of S210 and S220 without performing the determination processing of S240 and S250 of the control processing, regardless of whether or not a foreign object has contacted the window frame, Although the occurrence of entrapment can be detected, simply configuring in this way makes it impossible to reliably detect entrapment of foreign matter unless the upper end region, which is a region in which the presence or absence of entrapment is not determined, is set extremely small. That is, the boundary position indicated by the dashed line in FIG. 2 is set to a position as close as possible to the fully closed position (for example, the lower end position of the weather strip 7), and the upper end of the window glass W reaches the boundary position. If this is not accurately detected, it is not possible to prevent both the normally closed window glass W from being flipped to the open side and to reliably detect the presence or absence of pinching. It is.
[0055]
On the other hand, in the power window device of the present embodiment, the presence or absence of entrapment is detected by the logical sum of the determinations of S240 and S250 and the determinations of S210 and S220. In the worst case, it is possible to reliably detect that a foreign object is caught between the window glass W by the determinations in S240 and S250. In the determination of the position of the window glass W in S210, the upper end of the window glass W has almost reached the fully closed position. It is only necessary to be able to identify whether or not it is.
[0056]
As described above, according to the power window device of the present embodiment, the effect of reliably detecting the entrapment that has occurred in any state can be achieved by using a position sensor having a simple configuration without having to perform highly accurate position detection of the window glass W. 14 can be realized.
In the power window device of the present embodiment, the switch sensor provided in the window regulator 2 is used as the position sensor 14. However, a sensor whose output voltage or the like changes according to the opening degree of the window glass W is used. May be used. Further, in place of such a sensor, the opening / closing position of the window glass W may be detected by a rotation pulse of the motor 4. Regardless of how the open / close position of the window glass W is detected, according to the power window device of the present embodiment, high position detection accuracy is not required and simple detection means can be used.
[0057]
On the other hand, in the above-described embodiment, the load applied to the window glass W is detected as the drive current IM of the motor 4, but the rotational speed of the motor 4 may be detected instead of the drive current IM. . In this case, as the load applied to the window glass W increases, the rotation speed of the motor 4 decreases. Therefore, the determination value used in S250 of the control process is determined as the determination value to be compared with the rotation speed. The detection sensitivity may be set to a relatively large value to make the detection sensitivity sensitive, and the determination value used in S220 of the control process may be set to a relatively small value to make the detection sensitivity insensitive.
[0058]
Further, in the above embodiment, the boundary position for determining the upper end region is set at the leading end position of the visor 9 as shown by the one-dot chain line in FIG. 2, but this boundary position is set above the leading end position of the visor 9. You may. That is, the boundary position may be just before the fully closed position of the window glass W and within the range from the tip position of the visor 9 to the fully closed position.
[Brief description of the drawings]
FIG. 1 is a configuration diagram illustrating a configuration of a power window device according to an embodiment.
FIG. 2 is an explanatory diagram illustrating a mounting state of a pressure-sensitive sensor.
FIG. 3 is a flowchart illustrating a control process executed by a CPU in FIG. 1;
FIG. 4 is an explanatory diagram illustrating the operation of the power window device of the embodiment.
[Explanation of symbols]
2. Window regulator 4. Power window motor (motor)
6 ... Control device 7 ... Weather strip 8 ... Sash
9: Side window visor (visor) S: Pressure sensor D: Door
W: Window glass 10, 18: Resistor
12: microcomputer (CPU) 14: position sensor
16 input circuit 20 A / D converter CMP comparator
RLY1, RLY2 ... relay

Claims (3)

While controlling the opening and closing of the window glass of the vehicle in accordance with the switch information, and detecting that a foreign object is caught between the window glass and the window frame while controlling the window glass to the closing side, A power window device configured to control a windowpane to an open side,
Foreign matter detection means for detecting whether foreign matter has come into contact with the edge on the side where the window glass is closed in the window frame,
First load detecting means for detecting whether or not the load applied to the window glass has reached a first predetermined value;
Second load detecting means for detecting whether a load applied to the window glass has reached a second predetermined value set to a value larger than the first predetermined value,
Position detection means for detecting whether or not the tip of the window glass is located closer to the open side than a predetermined boundary position set before the fully closed position,
With
When the contact of the foreign matter is detected by the foreign matter detection means, and when the load applied to the window glass reaches the first predetermined value by the first load detection means, or The detecting means detects that the front end of the window glass is located on the opening side of the boundary position, and the load applied to the window glass reaches the second predetermined value by the second load detecting means. When it is detected that it has been performed, it is configured to detect that a foreign matter is sandwiched between the window glass and the window frame,
A power window device characterized by the above-mentioned. The power window device according to claim 1,
The first load detecting means and the second load detecting means,
Based on a drive current or a rotation speed of a power window motor for opening and closing the window glass, configured to detect whether a load applied to the window glass has reached each of the predetermined values,
A power window device characterized by the above-mentioned. The power window device according to claim 1 or 2,
A visor for avoiding rain is attached to the window frame, extending toward the tip side of the window glass,
The boundary position is set within a range from a tip position of the visor to a fully closed position of the window glass,
A power window device characterized by the above-mentioned.

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