JPH0628627Y2 - Lift control device for automobile power windows - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to an improvement of a lifting control device for a vehicle power window.

(Prior Art and its Problems) Conventionally, a power window for an automobile has been realized in which a forward / reverse rotation of a motor is performed by a switching operation of an ascending switch and a descending switch, and the driving force of the motor elevates and lowers the window.

By the way, when the down switch is turned on while driving the car and the window is opened a little (for example, 10 mm), the descending speed of the window is fast, so it is very difficult to perform delicate opening control only by manually operating the down switch. Met.

For this reason, the limit switch detects the most raised position of the window, lowers the motor voltage only in the initial stage of descent, and slows down the descending speed of the window to facilitate manual operation of the descending switch. However, even during the normal lowering operation (most of them are the same), the lowering speed at the beginning of lowering is slow, which is uncomfortable and there is a problem that an expensive limit switch needs to be provided.

(Purpose of the Invention) The present invention has been made to solve the above-mentioned conventional problems, and its purpose is to allow the window to be opened accurately and slightly by operating a switch different from the lifting switch. is there.

Therefore, according to the present invention, in a power window for an automobile in which a motor is rotated forward / reversely by a switching operation of an ascending switch and a descending switch, and the driving force of the motor elevates and lowers the window, another device is provided in parallel with the descending switch. It is characterized in that it is provided with a short-time descending circuit that closes the descending circuit for a certain short time by a switch operation.

(Operation and Effect of the Invention) The present invention operates the lowering circuit for a short time by operating a switch different from the lowering switch, and closes the lowering circuit for a certain short time.

Therefore, since the motor is driven for a short time by another switch operation, the window can be opened accurately only slightly regardless of the switch operation time.

By repeating the switch operation, you can open the window.

(Embodiment) Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

As shown in FIG. 1, a lifting control device for an automobile power window is provided with a raising circuit 3 having a raising switch 2 on the forward side of a motor 1 and a lowering circuit 5 having a lowering switch 4 on the reverse side. Then, the motor 1 is rotated in the forward and reverse directions by switching the raising switch 2 and the lowering switch 4, and the driving force of the motor 1 raises and lowers the window.

A short-time descending circuit 6 is provided in parallel with the descending switch 4.

As shown in detail in FIG. 2, the short-time descending circuit 6 includes a one-shot generating circuit 8 that outputs a pulse for a certain time t when the one-shot switch 7 is turned on, and outputs from the one-shot generating circuit 8. The pulse turns on the relay drive transistor 9 to excite the relay 10 to turn on the switch 10a (see FIG. 1) of the relay 10. Note that 11 is a pull-up resistor, 12 and 12 are voltage dividing resistors, and 13 is a surge resistor diode.

The one-shot generating circuit 8 is, as shown in FIG.
A Schmitt inverter 14 and a timer IC 15 are provided, and a capacitor 16 and a resistor 1 externally attached to the IC 15 are provided.
7, the time is set and the IC 15 generates a pulse of a constant time t.

With the above configuration, the one-shot switch 7 is turned on when the window is at the highest position and it is desired to open the window slightly (see FIG. 4).

When the one-shot switch 7 is turned on, the one-shot generating circuit 8 outputs a pulse for a predetermined time t, and the relay drive transistor 9 is turned on by this pulse to turn on the relay 10.
Is excited and the switch 10a of the relay 10 is turned on.

Therefore, even if the lowering switch 4 is off and the lowering circuit 5 is opened, the relay switch 10a is turned on and the lowering circuit 6 is closed for a predetermined time t by the lowering circuit 6 for a short time to reverse the motor 1 and the window is opened. The window is opened a little (for example, 10 mm) by moving down by a slight stroke corresponding to the time t.

As shown on the right side of FIG. 4, even if the one-shot switch 7 is kept on for a long time, the one-shot generation circuit 8
Since only a pulse of a constant time t is output for each ON operation, the window does not open more than necessary.

Also, if the one-shot switch 7 is repeatedly turned on, the window is lowered in small steps.

[Brief description of drawings]

FIG. 1 is an elevation control circuit diagram of a power window according to the present invention, FIG. 2 is a short-time descent circuit diagram, FIG. 3 is a one-shot generation circuit diagram, and FIG. 4 is an on / off timing of a one-shot switch and a relay switch. It is a figure. 1 ... motor, 2 ... up switch, 3 ... up circuit, 4 ... down switch, 5 ... down circuit, 6 ... short time down circuit, 7 ... one-shot switch, 8 ... one-shot generation Circuit, 10 ... Relay, 10a ... Switch, t ... Fixed time.

Claims (1)

[Scope of utility model registration request] 1. A power window for an automobile in which a motor is rotated forward / reversely by a switching operation of an ascending switch and a descending switch, and a window is lifted and lowered by a driving force of the motor. A power window elevator control device for an automobile, which is provided with a short-time descending circuit that closes the descending circuit for a certain period of time.