JPH0732171U - Vehicle window glass opening and closing device - Google Patents

Abstract

(57) [Abstract] [Purpose] When the operation switch was operated to the closed side, the reversible motor was temporarily controlled to the open side and then to the closed side, thereby operating the operation switch to the window glass closed side. Even in a situation where a trapping accident occurs immediately after that, the trapping state is surely detected and the trapping prevention function is operated accurately and promptly so as not to cause a dangerous accident for the occupant. [Structure] A reversible motor 1, a drive circuit 2, an operation switch 3, a rotation detection circuit 4 and a control circuit 5 are provided. The reversible motor 1 is provided in the window glass opening / closing mechanism of the vehicle. Drive circuit 2
Is connected to the reversible motor 1. The operation switch 3 is provided in the passenger seat of the vehicle. The rotation detection circuit 4 is connected to the reversible motor 1. The control circuit 5 includes the rotation detection circuit 4 and the operation switch 3
It also has a function of preventing the pinch accident from being connected to the drive circuit 2 and a reverse function of temporarily controlling the reversible motor 1 to the open side and then to the close side when the operation switch is operated to the close side.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an improvement of a vehicle window glass opening / closing device having a so-called pinching accident prevention function, which detects a pinching accident caused by a window glass and controls the window glass to an open side.

[0002]

[Prior art]

 Conventionally, this type of technique is disclosed in, for example, Japanese Patent Laid-Open No. 62-164983. According to the conventional technique, when a braking force is applied to the reversible motor due to an abnormal operation of the window glass, the braking force is detected and the reversible motor is energized to operate the window glass to an open side for a predetermined time. It had a trapping accident prevention function.

[0003]

[Problems to be solved by the device]

 In the case of the above-mentioned conventional technique, it can be detected that the braking force is applied to the reversible motor, for example, by monitoring the periodic change of the ripple current flowing in the motor. In other words, when braking force is applied to the reversible motor, a phenomenon occurs in which the cycle of the ripple current flowing in the motor becomes longer than a certain period. Therefore, the trapping accident prevention function described above may be activated when it is detected that the ripple current cycle has become longer than a certain cycle. However, in order to detect that the period of the ripple current has become longer than a certain period, a judgment time of a certain period or longer is required. In other words, if a trapping accident occurs immediately after the operation switch is operated to the window glass closing side, the reversible motor is at least constant on the window glass closing side even though the trapping accident has occurred. It continued to be urged for more than an hour, and the condition in which the occupant was sandwiched between the window glasses continued, and the situation further developed into a dangerous accident. This problem also occurs when the trapping accident is detected by other means than the above ripple current detection.

[0004]

[Means for Solving the Problems]

 This invention solves the above-mentioned problem, and when the operation switch is operated to the closing side, the reversible motor is temporarily controlled to the opening side and then to the closing side so that the operation switch is moved to the window glass. Even in the situation where a trapping accident occurs immediately after the operation to the closed side, the trapping state is reliably detected and the trapping prevention function is operated accurately and promptly so as not to cause a dangerous accident for the occupants. It is intended to

In order to achieve the above object, the present invention provides a reversible motor provided in a windowpane opening / closing mechanism of a vehicle, a drive circuit and a rotation detection circuit connected to the reversible motor, and a vehicle occupant seat. In a vehicle window glass opening / closing device including an operation switch and a control circuit connected to the rotation detection circuit, the drive circuit, and the operation switch, the control circuit has a function of preventing a pinch accident and the operation switch is closed. And a reversing function for temporarily controlling the reversible motor to the open side in response to the above operation.

[0006]

【Example】

 FIG. 1 is an electrical circuit diagram, FIG. 2 is a flow chart, and FIG. 3 is an electrical characteristic diagram. In FIG. 1, 1 is a reversible motor, 2 is a drive circuit, 3 is an operation switch, 4 is a rotation detection circuit, 5 is a control circuit, 6 is a limit switch, 7 is a door switch, 8 is a power supply circuit, and 9 is a watch. The dog circuit, 10 is an ignition switch, and 11 is a direct current power source, which will be described in detail below. The reversible motor 1, the drive circuit 2, the operation switch 3, the rotation detection circuit 4, the limit switch 6 and the door switch 7 are provided in the driver's seat, passenger seat and rear seat, respectively, but in FIG. It is shown as an example.

First, the reversible motor 1 is a motor that rotates normally and reversely according to the direction in which an exciting current is applied. The reversible motor 1 is provided in a window glass opening / closing mechanism (not shown), and is configured to close the window glass (not shown) during forward rotation and open it during reverse rotation, for example.

The drive circuit 2 includes relay coils 21 and 22, normally open contacts 23 and 24, normally closed contacts 25 and 26, movable contact pieces 27 and 28, and power transistors 29 and 20, and normally open contacts 23 and 24. The relay coils 21 and 22 are connected to a power source, the normally closed contacts 25 and 26 are connected to the rotation detection circuit 4, and the movable contact pieces 27 and 28 are connected to the reversible motor 1. Further, the relay coils 21 and 22 are connected to the ends P01 and P02 of the control circuit 5 via the power transistors 29 and 20, respectively.

The operation switch 3 is a manually-operated switch provided in the passenger seat of the vehicle. The operation switch 3 includes an UP switch 31 for operating the window glass when it is desired to operate the window glass to a closed side, a DO WN switch 32 for operating the window glass when it is desired to operate the window glass to the open side, and a window glass. Is configured with an AUTO switch 33 for operating when it is desired to close or open with one touch, and is connected to the ends P09, P10 and P11 of the control circuit 5. However, the AUTO switch 33 is provided only in the driver's seat.

The rotation detection circuit 4 is configured to convert the ripple component in the current flowing through the reversible motor 1 into a pulse signal and input the pulse signal to the control circuit 5. For example, the rotation detection circuit 4 has a low resistance of about several tens [mΩ]. It comprises a device 41, a filter 42, an amplifier 43 and a waveform shaper 44. The rotation detection circuit 4 is connected to the end P03 of the control circuit 5.

The control circuit 5 is composed of a microcomputer and its peripheral circuits, and is programmed with a trapping accident prevention function and a reverse rotation function. Here, the trapping accident prevention function is to avoid a trapping accident by operating a window glass that is operating on the closing side to the open side when a trapping accident occurs while the window glass is operating on the closing side. Say the function to let. The reversing function means a function of temporarily controlling the reversible motor 1 to the open side when the operation switch 3 is operated to the window glass close side, and then controlling it to the close side. The trapping accident prevention function and the reverse rotation function will be described below with reference to the flowchart of FIG.

FIG. 2 is a flowchart for controlling the window glass of each seat. First, after starting at step 101, the process proceeds to step 102. The step 102 is a step of determining whether or not the UP switch 31 has been turned ON. If the determination in step 102 is YES, the process proceeds to step 103, and if it is ON, the process proceeds to step 109.

Step 103 is a step of starting the reverse rotation function, and reverses the reversible motor 1 to open the window glass, for example, by about 4 [mm]. The fact that the window glass has opened about 4 mm is detected by counting the number of pulses of the ripple signal. Then, in step 104, the reversible motor 1 is normally rotated to close the window glass opened in step 104, and the process proceeds to step 105.

Step 105 is a step of judging whether or not the window glass has reached the upper end based on the signal input from the limit switch 6. If YES, the process proceeds to step 113, and if NO, the process proceeds to step 106. .

Step 106 is a step of measuring the ripple period from the pulse signal input from the rotation detection circuit 4, and proceeds to step 107 following the step.

Step 107 is a step of judging whether or not a trapping accident has occurred from the ripple cycle measured in step 106. When a trapping accident occurs, the reversible motor 1 is locked and, for example, as shown in FIG. 3, the ripple cycle T1 of the exciting current becomes longer to the cycle T2, or the exciting current increases above the threshold Th. Here, when the control circuit 5 detects that the ripple period T1 has increased to the period T2, it is determined that a pinching accident has occurred.

The vertical axis of the characteristic diagram shown in FIG. 3 represents the exciting current flowing through the reversible motor 1. The vertical axis of the figure is time, t0 is the time when the reversible motor 1 starts to rotate, t1 is the time when the rush current of the reversible motor 1 has subsided, and t2 is the braking force applied to the reversible motor 1 to lock it. The figures show when the current is generated. If the determination in step 107 is YES, the process proceeds to step 108, and if the determination is NO, the process proceeds to step 104.

Step 108 is a step of avoiding the trapped state by reversing the window glass in the closing operation by a predetermined amount, for example, about 200 [mm], when the trapping accident is judged in the above Step 107. Is. When the step is completed, the process proceeds to step 113, and the reversible motor 1 is stopped.

Steps 109 to 112 are steps for controlling the window glass to the open side by operating the DOWN switch 32, and it is determined in step 109 that the DOWN switch 32 of the operation switch 3 has been operated. If so, the window glass is controlled to the open side in step 110, the ripple cycle is measured in step 111, and it is determined in step 112 from the ripple cycle that the reversible motor 1 is locked at the lower end of the window. Proceed to 113 to stop the reversible motor 1.

As described above, the control circuit 5 has a reverse rotation function as shown in steps 103 and 104 of the flowchart of FIG. Similarly, the control circuit 5 has a function of releasing the trapping accident prevention function as shown in steps 106 to 108.

The limit switch 6 is a switch that is turned on when the window glass reaches the fully closed position, and whether the ripple cycle of the signal input from the rotation detection circuit 4 is long due to the trapping or whether the window glass is closed. Is a structure for giving information to the control circuit 5 so that the control circuit 5 can distinguish whether it has become longer due to reaching the fully closed position. For example, it is provided in the speed reduction mechanism of the reversible motor 1 and the end of the control circuit 5 is provided. It is connected to the section P12. According to the above-mentioned flow chart, when the limit switch 6 is turned on, the determination at step 105 is YES, and the operation proceeds to step 113 to stop the operation of the window glass.

The door switch 7 is a switch that is turned on when the door of the vehicle is opened, and is provided, for example, in the hinge portion of the door and is connected to the end portion P13 of the control circuit 5.

The power supply circuit 8 is a circuit for applying a constant voltage to the control circuit 5, the watchdog circuit 9, etc., and is composed of a regulator 81 and a transistor 82, and is connected to the terminals VDD, P04 of the control circuit 5 and the watchdog circuit 9. Connected. The watchdog circuit 9 is a circuit that monitors the operation of the control circuit 5 and resets the control circuit 5 when the control circuit 5 runs out of control, and is connected to the ends P05, P06, and P07 of the control circuit 5. ing.

The ignition switch 10 is an existing switch and is connected to the end P08 of the control circuit 5.

Next, the operation of the embodiment having the above configuration will be described. First, when the occupant operates, for example, the UP switch 31 in the rear seat, the control circuit 5 derives the exciting current to the relay coil 22 in step 103 shown in FIG. As a result, the movable contact piece 28 is connected to the normally open contact 24, the reversible motor 1 reversely rotates, and the window glass starts to move to the open side. At this time, the ripple component of the current flowing through the reversible motor 1 is converted into a pulse signal by the rotation detection circuit 4 and input to the control circuit 5.

The control circuit 5 determines from the count value of the pulse signal input from the rotation detection circuit 4 that the window glass has opened by about 4 [mm], and at the same time, the excitation of the relay coil 22 is stopped, and subsequently, FIG. An exciting current is derived to the relay coil 21 by step 104 shown in FIG. As a result, the movable contact piece 27 is connected to the normally open contact 23, the reversible motor 1 rotates in the forward direction, and the window glass starts to move to the closing side.

Next, the control circuit 5 monitors from the pulse signal input from the rotation detection circuit 4 whether or not a pinch accident due to window glass has occurred. When it is determined that a trapping accident has occurred, the reversible motor 1 is reversed in steps 107 and 108 to open the window glass by a predetermined amount.

However, when it is detected that the limit switch 6 has operated, even if the pulse signal from the rotation detection circuit 4 is in the same situation as when the trapping accident has occurred, the step of judging the trapping accident by the step 107 is performed. Do not execute. Therefore, the reversible motor 1 continues to operate toward the side that closes the window glass until it is determined in step 105 that the limit switch 6 on the fully closed side has operated.

In addition, when the occupant operates the DOWN switch 32, the window glass operates to the open side only for the time when the switch is operated. Further, when the AUTO switch 33 is operated, if the switch is operated by one touch, the operation continues until the window glass is fully opened. Further, when the ignition switch 10 is operated OFF while the control circuit 5 is controlling the reversible motor 1, the signal derived from the end P04 is stopped when the control of the reversible motor 1 is completed, and the power supply circuit 8 Stop the operation of.

[0030]

[Effect of device]

 The present invention has the following effects because the control circuit has a reverse rotation function that temporarily controls the reversible motor to open when the operation switch is operated to close, and then controls it to close. That is, even if a trapping accident occurs immediately after the operation switch is operated to the side where the window glass is closed, the trapping state can be reliably detected and the trapping prevention function can be activated accurately and promptly, which is dangerous for the occupants. You can try not to cause an accident. For example, even if the configuration is such that a trapping accident state is determined by detecting a periodic change in ripple current and a determination time of a certain time or longer is required, a sufficient determination time can be secured.

[Brief description of drawings]

FIG. 1 is an electric circuit diagram showing a preferred embodiment of the present invention.

FIG. 2 is a flowchart showing functions programmed in the control circuit shown in FIG. 1, showing a main part of a window glass control mode.

FIG. 3 is an electrical characteristic diagram of an exciting current of a reversible motor flowing in the rotation detection circuit shown in FIG. 1 at a predetermined time.

[Explanation of symbols]

 1 Reversible Motor 2 Drive Circuit 3 Operation Switch 4 Rotation Detection Circuit 5 Control Circuit 6 Limit Switch 7 Door Switch 8 Power Circuit 9 Watchdog Circuit 10 Ignition Switch 11 DC Power Supply

Claims (1)

[Scope of utility model registration request] 1. A reversible motor provided in a window glass opening / closing mechanism of a vehicle, a drive circuit and a rotation detection circuit connected to the reversible motor, an operation switch provided in a passenger seat of the vehicle, the rotation detection circuit, and a drive circuit. In a vehicle window glass opening / closing device including a control circuit connected to the operation switch, the control circuit has a trapping accident prevention function, and the reversible motor is temporarily operated in response to an operation of the operation switch toward the closing side. A window glass opening / closing device for a vehicle, which has a reversing function of controlling to the open side.