JPH0474509B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (1) Object of the invention (industrial field of application) The present invention relates to a control circuit for an automobile door lock.

(Prior art and issues to be solved) To unlock a car door from the inside and go outside, it is common to operate the door lock knob to unlock it, and then pull the inside handle on the inside side to open the door. The door could not be opened without operating both the door lock knob and the inside handle.

The present invention eliminates such complication and allows the door to be unlocked and opened simply by operating the inside handle, and also issues an alarm when the key is inserted in the steering lock. The object of the present invention is to provide a lock control circuit which prevents the door from being opened even if the door lock knob is unlocked by operating the inside handle.

(2) Structure of the Invention In order to achieve the above object, the present invention provides an inside handle switch that closes when the inside handle is operated, a steering lock switch that closes when a key is inserted, and a steering lock switch that locks the door. A door lock knob switch that closes when the door is opened is connected in parallel to a power source, and the output side of each switch is connected to a first AND gate that operates an alarm, and a second AND gate that operates a drive member that opens the door lock. and the second input side of the steering lock switch.
An inverter is connected to the input side of the AND gate of the door lock knob switch and an input side of the door lock knob switch to the first AND gate, and the alarm is connected to the output side of the first AND gate. This is a control circuit for an automobile door lock, in which the driving members are connected to the output sides of two AND gates.

With this configuration, when opening the door from inside the room, you can open the door without operating the door lock.
The door can be opened using only the inside handle, and it also prevents forgetting to remove the key.

(Description of Embodiments) The attached drawings show an automobile door lock control circuit showing an embodiment of the present invention.

An inside handle switch 5 that is closed when the inside handle is operated to open the door, a steering lock switch 6 that is closed when the key is inserted, and a door lock switch that is closed when the door is locked. 7 are connected in parallel to the power supply 1 via limiting resistors 2, 3, and 4, respectively.

Each switch 5, 6, 7 has a resistor 8, 9, respectively.
and 10 to ground 21.

The switch 5 has input terminals a and e of the first AND gate 13 and the second AND gate 14, the switch 6 has terminals b and g of each gate 13 and 14, and the switch 7 has terminals d and d of each gate 13 and 14, respectively. Inverters 12 and 11 are further connected to the terminals d and g, respectively.

An alarm 17 and an operating member C including a motor 18 and an actuator 19 for operating the door lock are connected to the output side of each AND gate 13, 14 via amplifiers 15, 16.

Next, to explain the operation, when the key is inserted into the steering lock, switch 6 is closed, so gate 13 is connected to terminal b.
However, due to the inverter 11, no signal is input to the input terminal g of the gate 14 (referred to as off).

At this time, if the switch 7 is closed by locking the door, the terminal d of the gate 13 is turned off by the inverter 12, and the terminal h of the gate 14 is turned on.

Then, when the inside handle is operated, the switch 5 is closed in conjunction with this, and the terminals a and e of both gates 13 and 14 are both turned on.

To summarize the status of each gate above, even if the inside handle is operated when the key is inserted into the steering lock switch 6 and the door lock switch 7 is locked, all terminals of the gates 13 and 14 will be connected. It will never turn on and therefore the alarm 17 will not issue an alarm.
Further, since the drive member C does not operate, the door will not open.

When the key is removed from the steering lock, switch 6 is opened and terminal b of gate 13 is connected to ground 21, which turns it off and gate 1 is turned off.
Terminal g of No. 4 is turned on by inverter 11.

At this time, if the door lock knob is locked, switch 7 is closed, so gate 1
The terminal d of the gate 14 is turned off, and the terminal h of the gate 14 is turned on.

When the inside handle is activated, switch 5
is closed and terminals a and e are turned on.

As can be seen from the above results, the gate 13 terminal is on, off, off, and the gate 14 terminal is on,
Since it turns on and on, the alarm 17 does not operate,
Since the drive member C is actuated, the door can be opened.

That is, in this case, the door can be opened and closed simply by operating the inside handle, regardless of the door lock knob.

Next, when the key is inserted in the steering lock and the door lock knob is unlocked,
When the inside handle is operated, terminals a, b, and d of the gate 13 are turned on (by the inverter 12), so the alarm 17 issues an alarm, and at the gate 14, the terminal e is turned on, and the terminal e is turned on. g
is off (by the inverter 11) and h is off, so the drive member C is not activated and the door cannot be opened.

With this configuration, it is possible to prevent the person from forgetting to take out the key and leaving the house.

(3) Effects of the Invention As explained above, according to the present invention, when opening a door from inside the car, even if the door lock is locked, there is no need to separately operate the door lock, and only the inside handle can be operated. This makes it possible to unlock and open the door, and at the same time, it is effective in preventing forgetting to remove the key.

[Brief explanation of the drawing]

The accompanying drawings show an embodiment of a door control circuit according to the invention. 1...Power supply, 5...Inside handle switch, 6...Steering lock switch, 7...
Door lock knob switch, 13...first AND gate, 14...second AND gate, 15,1
6...Amplifier, 17...Alarm, C...Drive member.

Claims (1)

[Claims] 1. An inside handle switch that closes when the inside handle is operated, and a steering lock switch that closes when the key is inserted.
A door lock knob switch that closes when the door is locked is connected in parallel to the power supply, and the output side of each switch is connected to the first AND gate that activates the alarm and the drive member that opens the door lock. and an inverter is connected to the input side of the second AND gate of the steering lock switch and the input side of the door lock knob switch to the first AND gate, respectively. a control circuit for an automobile door lock, further comprising: connecting the alarm to the output side of the first AND gate; and connecting the drive member to the output side of the second AND gate.