JP2962340B2 - Power window device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for reliably detecting when a human body is caught in a window frame by a power window glass of a vehicle.

[0002]

2. Description of the Related Art In a conventional vehicle, a switch is mounted on an upper edge of a window frame. When a human body is sandwiched in the window frame by a power window glass, the switch is closed by the pressing force to detect the human body being sandwiched. However, because it is difficult to accurately adjust the pressing force to close the switch, the switch can be closed simply by touching the switch, or the switch can be quickly opened even if a human body is actually caught. It was not always easy to ensure good operation by not closing the door. Further, as disclosed in Japanese Patent Application Laid-Open No. 3-169990, a restraint stop detection circuit is installed as a power window control device of a vehicle, and a part of a human body is caught in a window during power window operation from outside the vehicle. At times, the drive of the power window motor is stopped by detecting an increase in the current in the power window motor, but in this case, the rubber property of the weather strip in the window becomes hard in a cold region and the like. If the sliding resistance of the power window glass increases and the current of the motor increases, the power window motor does not operate even if a part of the human body is not sandwiched between the power window glasses, and the power window glass does not close. There was such a problem.

[0003]

SUMMARY OF THE INVENTION According to the present invention, when a human body is caught in a window frame by a power window glass of a vehicle, the power window glass is accurately detected to detect the human body. It is intended to easily achieve both prevention and prevention.

[0004]

For this reason, a power window device according to the present invention comprises a pinch sensor, a power window motor, an adjuster mounted on a window frame, an electric quantity of the power window motor and the adjuster. A power window is provided when the electric sensor of the power window motor reaches the electric energy set by the adjuster. It is configured to detect a human body being caught by glass.

[0005]

Therefore, even if the sensor is actuated due to a hand touch or the like and the human body is not sandwiched by the power window glass, the electric quantity of the power window motor does not increase abnormally. There is no erroneous detection that the human body is pinched by the glass, and conversely, even if the electric quantity of the power window motor rises abnormally for some reason, if the human body is not pinched by the power window glass, Since the sensor does not operate, the detection of the human body being caught by the power window glass is not erroneously detected. On the other hand, if the human body is caught by the power window glass, the sensor is always activated and the power window is activated. Since the electric quantity of the motor rises abnormally, the power window glass The sandwiched of the body can be reliably detected.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The embodiments of the present invention shown in the drawings will be specifically described below. In the window 2 of the vehicle opened and closed by the power window glass 1, the indoor side sash 3 at the upper frame edge
A tape switch 4 is attached along the line, and the tape switch 4 has electrodes 6, 6 opposed to each other by a thin rubber 5.
The electrodes 6, 6 are connected by the bending of the tape switch 4
Operates, and a detection signal is sent between the AND gate 7.

On the other hand, a lock detection current sensor 9 is provided for the drive motor 8 of the power window glass 1 and a variable resistor 10 is installed in a separate circuit. The voltage value of the sensor 9 corresponding to the increased current in the motor 8 when the human body is pinched can be set, and the actual voltage value of the current sensor 9 and the voltage value set by the variable resistor 10 are used as a comparator. The pressure detection signal is sent to the AND gate 7 when the former reaches the latter.

Therefore, when a human body is pinched by the operation of the motor 8 that raises the power window glass 1, a pressing force acts on the tape switch 4 to operate the tape switch 4 and detect the pinch by the AND gate 7. At the same time as the signal is sent, the current value of the motor 8 increases and the comparator 11
The voltage value guided to the variable resistor 10 reaches the voltage value set by the variable resistor 10, and the pressure detection signal is sent between the AND gate 7. Therefore, an emergency signal is sent from the AND gate 7 to a control circuit (not shown) by both signals. Thus, the danger to the human body can be reliably avoided by appropriately lowering the power window glass 1 by stopping and reversing the motor 8.

On the other hand, while the motor 8 for raising the power window glass 1 is operating, the tape switch 4 is touched and the tape switch 4 is operated, and the detection signal is sent to the AND gate 7. Also, if the power window glass 1 does not pinch the human body, the current amount of the motor 8 will not abnormally increase.
The voltage value of the current sensor 9 guided to 1 does not reach the voltage value set by the variable resistor 10, and therefore,
Since the pressure detection signal is not sent to the AND gate 7, an emergency signal indicating that a human body is being held is not erroneously sent from the AND gate 7 to the control circuit.

In addition, the sliding resistance of the power window glass 1 increases due to factors such as the rubber property of the weather strip in the window 2 becoming hard in cold regions, and the current amount of the motor 8 abnormally increases. When the voltage value of the current sensor 9 guided to the power supply reaches the voltage value set by the variable resistor 10 and the pressure detection signal is sent between the AND gate 7 and the power window glass 1, Is not sandwiched, the tape switch 4 does not operate and the detection signal is not sent to the AND gate 7, so that, similarly to the above case, the emergency signal that the human body is sandwiched is issued. There is no erroneous transmission from the AND gate 7 to the control circuit.

In addition, since the strength of the pressing force by which the human body is pinched by the power window glass 1 is detected by the amount of current of the motor 8, the operating pressure of the tape switch 4 is made relatively light, so that the power window glass 1 It is possible to reliably detect the pinching of the human body, and easily adjust the strength of the pressing force when the human body is pinched by the power window glass 1 by the voltage set by the variable resistor 10. Can be
From this aspect as well, control can be performed so that the pinching of the human body by the power window glass 1 is always accurately detected.

That is, when the human body is caught in the window frame by the power window glass 1, the present apparatus accurately detects this and activates the control circuit,
The danger to the human body can be reliably avoided, and when the power window glass 1 does not hold the human body in the window frame, the tape switch 4 is disconnected for some reason.
Even if the power window glass 1 is accidentally closed or the load of the motor 8 increases more than usual, the power window glass 1 does not malfunction and stop, and as a result, the power window glass 1 always operates safely and normally. It is safe because you can do it.

Although the above embodiment shows a case of a glass window with a sash of a vehicle, in a glass window without a sash, a pressing force sensor such as the tape switch is provided on the lower surface of the indoor weather strip at the upper edge of the window frame. Needless to say, in addition to the above-described pressing force sensor, a sensor or the like that detects a change in electric capacity caused by a human body being sandwiched may be used as the sandwiching sensor. Absent.

[0014]

In the power window device according to the present invention, the pinching of the human body by the power window glass is detected accurately from the signal of the pinching sensor and the signal of the comparator, thereby accurately detecting the pinching of the human body. As a result, the safety and operation reliability of the power window device can be easily improved, and the marketability of a vehicle equipped with the power window device can be improved.

[Brief description of the drawings]

FIG. 1 is an electric circuit diagram according to an embodiment of the present invention.

FIG. 2 is a perspective view of a vehicle equipped with the embodiment.

FIG. 3 is an enlarged cross-sectional view taken along the line III-III of FIG. 2;

FIG. 4 is an enlarged perspective view of a main part of FIG. 3;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Power window glass 4 Tape switch 7 AND gate 8 Motor 9 Current sensor 10 Variable resistor 11 Comparator

Claims (1)

(57) [Claims] 1. A pinch sensor, comprising: a pinch sensor, a power window motor, a regulator attached to a window frame, and a comparator for comparing the quantity of electricity of the power window motor with the quantity of electricity set by the regulator. Is operated, and when the amount of electricity of the power window motor reaches the amount of electricity set by the adjuster by the comparator, the power window is configured to detect the pinching of the human body by the power window glass. apparatus.