JPH0538253U - Window glass opening and closing control device - Google Patents

Abstract

(57) [Summary] [Purpose] A single ripple detection unit individually stops multiple window opening / closing motors. [Structure] The ripple detector 9 detects a ripple generated as the motors 1, 2, 3 and 4 rotate, and outputs a detection signal when the ripple cycle becomes longer than a predetermined cycle. The control unit 10 receives this detection signal. Control unit 1
0 sequentially and cyclically controls a plurality of sets of semiconductor switch units 5, 6, 7 and 8 connected to the motors 1, 2, 3 and 4 in a time division manner. Then, when the detection signal is received, the semiconductor switch units 5, 6, 7 and 8 in operation are stopped.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an improvement of a window glass opening / closing control device having an automatic stop function at the fully closed and fully opened positions of a window glass.

[0002]

[Prior Art]

 Conventionally, as a technique of this kind, Japanese Utility Model Publication No. 61-37750 discloses a ripple detection circuit that generates a rectangular wave signal according to a ripple included in a current flowing through a motor, and an interval of the rectangular wave signal from the ripple detection circuit. We have proposed an automatic window glass lift control device that includes a stop circuit that shuts off the bias current of the transistor in the self-holding circuit and makes the operating switch self-return to stop the motor when the interval becomes longer than a predetermined value.

[0003]

[Problems to be solved by the device]

 However, in the case of the above-mentioned conventional technique, the number of ripple detection circuits and the like corresponding to the number of motors are required.

[0004]

[Means for Solving the Problems]

 This invention detects a motor for opening and closing a window glass, a plurality of sets of semiconductor switch parts connected to the motor and energized, and a ripple generated as the motor rotates, and a ripple cycle is determined to be a predetermined value. The ripple detector that derives the detection signal when it becomes longer than the cycle, and the plurality of sets of semiconductor switch sections operate cyclically in a time-divisional manner, and at the time when the detection signal is received from the ripple detector. The control device for stopping the semiconductor switch part in the inside of the window glass opening and closing device allows a plurality of motors to be individually stopped despite the single ripple detection part. Provide a control device.

[0005]

FIG. 1 shows an electric circuit diagram of a preferred embodiment of the present invention. In the figure, 1, 2, 3 and 4 are motors for opening and closing the window glass, which are provided with an elevating mechanism (not shown) for each window glass of the driver's seat, passenger seat, rear right seat and rear left seat. It is composed of a first motor 1, a second motor 2, a third motor 3 and a fourth motor 4 which are driven. Reference numerals 5, 6, 7 and 8 denote semiconductor switch portions which are connected to and bias the motors 1 to 4, for example, first, second, third and fourth semiconductor switch portions 5, 6, 7 and It is composed of a total of 4 sets of 8. Each of the semiconductor switch sections 5 to 8 is composed of four power MOS FETs 5a to 5d, 6a to 6d, 7a to 7d and 8a to 8d. Reference numeral 9 denotes a ripple detector that detects ripples generated by the rotations of the motors 1 to 4 and derives a detection signal when the ripple cycle becomes longer than a predetermined cycle. As the ripple detecting section 9, for example, a ripple detecting circuit as shown in Japanese Utility Model Publication No. 61-37750 can be used. A control unit 10 operates the four sets of semiconductor switch units 5 to 8 cyclically in a time-divisional manner and stops the operating semiconductor switch unit when a detection signal is received from the ripple detection unit 9. Is. The control unit 10 is composed of a microcomputer and a logic circuit. Reference numeral 11 is a detection resistor commonly connected to the downstream side of the first to fourth semiconductor switch units 5 to 8. The detection resistor 11 is configured such that the currents of the four motors 1 to 4 described above flow. However, since the motors 1 to 4 are energized in a time sharing manner as described above, the four motors 1 to 4 are The current of 4 does not flow all at once. Therefore, the detection resistor 11 can easily generate a relatively small amount of heat. Reference numeral 12 is an automatic reset type switch, which includes movable contact pieces 12a to 12d, rising side fixed contacts 12e to 12h, and falling side fixed contacts 12i to 12l. In addition, 13 is a DC power supply.

Next, the operation of the embodiment will be described with reference to the time chart shown in FIG. The time chart shown in FIG. 2 exemplifies the case where the window glass of all seats is controlled to the rising side. The vertical axis of FIG. 2 represents the potential V at the input end and the output end of the control unit 10, and the horizontal axis represents the time t. First, at time t1, the switch 12 is operated to bring the movable contact pieces 12a to 12d into contact with the ascending side fixed contacts 12e to 12h. As a result, the control unit 10 turns on the power MOS FETs 5a and 5d of the first semiconductor switch unit 5 from the time t 1 to the time t2, and biases the first motor 1 to the rising side. Subsequently, the control unit 10 turns on the power MOS FETs 6a and 6d of the second semiconductor switch unit 6 from time t2 to time t3, and biases the second motor 2 to the rising side. Similarly, from time t3 to time t4, the power MOS FETs 7a and 7d of the third semiconductor switch unit 7 are turned on, and from time t4 to time t5, the power MOS FETs 8a and 8d of the fourth semiconductor switch unit 8 are turned on and the third The motor 3 and the fourth motor 4 are biased to the rising side. The above-described operation from the time t1 to the time t5 constitutes one cycle, and the four sets of semiconductor switch parts 5 to 8 operate cyclically. Then, between the time t15 and the time t16, when the window glass of the rear right seat is fully closed and the third motor 3 is locked, the ripple detector 9 derives a detection signal. When the control unit 10 receives this detection signal, the control unit 10 stops the third semiconductor switch unit 7 being controlled at this point. Similarly, the control unit 10 receives the detection signal from the ripple detection unit 9 to stop the fourth semiconductor switch unit 8 from the time t20 to the time t21, and the first semiconductor switch unit 8 from the time t21 to the time t22. The semiconductor switch unit 5 is stopped, and the second semiconductor switch unit 6 is stopped at time t22. The operation for controlling the window glass on the descending side is the same as above.

[0007]

[Effect of the device]

 Since the present invention has the above-described structure and operation, the motor of the semiconductor switch unit that is operating when the detection signal is received from the ripple detection unit is not included in spite of the single ripple detection unit. It has an excellent effect that it is possible to stop at any time, and a plurality of motor currents do not flow to the detection resistors of the ripple detection section all at once, so that the heat generation amount of the detection resistors can be reduced.

[Brief description of drawings]

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

FIG. 2 is a time chart showing potential waveforms at an input end and an output end of the control unit shown in FIG.

[Explanation of symbols]

 1 1st motor 2 2nd motor 3 3rd motor 4 4th motor 5 1st semiconductor switch part 6 2nd semiconductor switch part 7 3rd semiconductor switch part 8 4th semiconductor switch part 9 Ripple detection part 10 Control part

Claims (1)

[Scope of utility model registration request] 1. A motor for opening and closing a window glass, a plurality of sets of semiconductor switch portions connected to the motor to urge the motor, and a ripple generated as the motor rotates,
A ripple detection section that derives a detection signal when the ripple cycle becomes longer than a predetermined cycle, and the plurality of semiconductor switch sections are sequentially and cyclically operated in a time division manner, and the detection signal from the ripple detection section is used. A window glass opening / closing control device, comprising: a control unit that stops the semiconductor switch unit that is operating at the time of receiving the light.