JPS58181975A - Door lock control circuit for automobile - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a door lock control circuit for an automobile that can perform the following steps.

The object of the present invention is to provide a door lock control circuit for an automobile in which the door is locked when the outside handle is temporarily pulled up and the IT door is closed.

An embodiment of the present invention will be described below with reference to the drawings.

Even if you temporarily pull up the outside handle and then release it, you can still open the door as long as you close it within a certain amount of time.

A handle switch S1 is fixed to the door panel adjacent to the outside handle. The handle switch S1 is
Turns on when the handle is pulled.

It turns OFF when released.

A timer circuit T is connected to the handle switch S+.

...When the handle is pulled, the switch S+ is turned on, so the capacitor C is charged through the resistor R1 and switch S1. At this time, since the key is not in the ignition lock, the warning switch S2 is OFF.

When the key is in the ignition lock, the warning switch S2 is turned on and the capacitor C is not charged.

When switch S+ is ON and capacitor C is being charged, transistor Q+ of timer circuit T is ON, but
Since the door switch S3 is ON when the door is open, the voltage at the threshold level is not applied to the base of the transistor Q2 of the switching circuit, so the transistor Q2 is not turned ON. Also, if you keep pulling the outside handle, the switch S+ remains ON, so the voltage at the connection point P is at a low level, or the transistor Q
2nd time won't turn on.

When you release your hand from the outside handle, No. 1 border Sl becomes 0FFK, but capacitor C is connected to transistor Q1 and resistor R.
1, so during the discharge time, transistor Q is ON.

If you close the door while transistor Q+ is on during this discharge time, door switch S3 turns off, and voltage is applied to the base of transistor Q2 through resistor R5, so transistors Q2 and Q3 (Darlington Since the circuit) becomes conductive and relay RY turns ON, door lock actuator M operates.

If there is no diode D+ connecting the connection point P and the handle switch S1, not only when the handle is pulled and the door is closed by releasing the handle, but also when the handle is pulled while the handle is being pulled, that is, when the handle switch S1 is closed. Even if the door is closed with the transistor Q turned on, the door can be locked because the transistor Q is turned on.

As described above, the present invention has a practical effect since the door is locked as soon as the door is closed even if the outside handle is released, so there is no need to worry about locking the door.

[Brief explanation of the drawing]

The figure represents an electrical circuit diagram of the invention. SL - Handle switch, S2... Warning switch, S3... Door switch, P... Connection point, Qo, Q2. Q3...Transistor, M...Door lock actuator, C...Capacitor. Patent applicant: Kokusan Metal Industry Co., Ltd.

Claims (1)

[Claims] A handle switch activated by the outside handle, a timer circuit triggered by the handle switch, a door switch that detects the opening and closing of the door, a switching circuit connected to the above timer circuit and door switch, and the output of the switching circuit. A door lock control circuit for an automobile, comprising a door lock actuator to be operated.