JPS59447Y2 - Door locking and unlocking device to prevent forgetting to remove the key - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a door locking and unlocking device for preventing forgetting to remove the key, which prevents the door from being locked when the key is forgotten to be removed.

Previously, this type of device existed to prevent forgetting to remove the key, but
These things: ■If you forgot to take out the key and opened the door, the buzzer would sound each time the door was opened, disturbing the quiet state.

■I used to misunderstand the meaning of the buzzer and lock the door.

■A buzzer had to be installed separately, making the device complex and large.

The present invention has been devised to eliminate these drawbacks, and one embodiment of the door locking and unlocking device for preventing forgetting to remove the key according to the present invention will be described below with reference to the accompanying drawings.

Reference numeral 1 designates a door locking/unlocking switch, which has a locking side fixed contact 1a, an unlocking side fixed contact 1b, and a movable contact piece 1C.

2 is a key switch, which turns O when the key is inserted into the lock hole.
It also turns OFF when the key is pulled out of the lock hole.

3 is a door switch, which is turned on by opening the door.

4 is an AND logic circuit, into which output signals from the key switch 2 and the door switch 3 are introduced.

5 is a timer circuit, and its output signal is introduced into the AND logic circuit 4.

Reference numeral 6 denotes a door locking control circuit, which is connected to the locking side fixed contact 1a of the door locking/unlocking switch 1.

Reference numeral 7 denotes a door unlocking control circuit, which is connected to the unlocking side fixed contact 1b of the door locking/unlocking switch 1.

Reference numeral 8 denotes a power source, which is connected to the door locking control circuit 6 and the door unlocking control circuit 7.

Sl is a locking relay contact, and the closing action activates the electromagnetic actuator 9 to lock the door.

S2 is an unlocking relay contact, and the closing action activates the electromagnetic actuator 9 to unlock the door.

Next, the operation will be explained.

First, when the door switch 3 or the key switch 2 is OFF, if the movable contact piece 1C of the door locking/unlocking switch 1 is brought into contact with the lock side fixed contact 1a, the power source 8, the emitter and base of the transistor T1, Resistor R1, diode D1,
The circuit consisting of the capacitor C1 and the door locking/unlocking switch 1 is energized, charging the capacitor C1 and making the transistor T1 conductive.

Then, a circuit consisting of the emitter and collector of the transistor T1, the resistor R2, the resistor R3, and the base and emitter of the transistor T2 is energized to make the transistor T2 conductive.

Then, the locking relay coil Y1 is energized, the locking relay contact S1 is activated, the electromagnetic actuator 9 is activated, and the door is locked.

Further, a circuit consisting of the emitter and base of the transistor T1, the capacitor C2, the resistor R4, the resistor R5, and the collector and emitter of the transistor T2 is energized.
2 remains conductive until the capacitor C2 is completely charged.

Next, when the movable contact piece 1C of the door locking/unlocking switch 1 is brought into contact with the unlocking side fixed contact 1b, the emitter and collector of the transistor T1, the resistor R2, the diode D2, and the door locking/unlocking switch 1 are connected. The circuit is energized and transistor T2 is non-conductive.

Therefore, transistor T1 also becomes non-conductive.

Also, the circuit consisting of the power source 8, the emister and base of the transistor T3, the resistor R6, the diode D3, the capacitor C3, and the door locking/unlocking switch 1 is energized to make the transistor T3 conductive.

Then, the same operation as above is carried out, and 1-transistor T
4 is made conductive to energize the unlocking relay coil Y2, the unlocking relay contact S2 is activated, and the electromagnetic actuator 9 is activated to unlock the door.

By the way, if the occupant forgets to pull out the key from the lock hole, the key switch 2 is turned on, and when the occupant opens the door, the door switch 3 is turned on.

Furthermore, the door lock knob is operated to bring the movable contact piece 1C of the door lock/unlock switch 1 into contact with the lock side fixed contact 1a.

The operation is almost the same as that described above, but when the circuit consisting of the capacitor C4, the resistor R7, the diode D4, and the door lock/unlock switch 1 is energized, the capacitor C4
to charge.

Further, when the movable contact IC of the door locking/unlocking switch 1 returns to the switch-off state, the capacitor C4 is discharged in the closed circuit of the emitter and base of the transistor T5, the resistor R8, and the capacitor C4.

Therefore, the transistor T5 becomes conductive, and the transistor T5 becomes conductive.
5 emitter and collector, resistor R9, resistor RIO1)・
Base and emitter of transistor T6 and door switch 3
The transistor T6 becomes conductive.

Note that the transistor T7 is in a conductive state.

Therefore, it is possible to make the transistors T3 and T4 conductive and forcibly attempt to unlock the door.

In the figure, R1□ to R25 are resistors, C5 to C7 are capacitors, Z1 to Z4 are Zener diodes, and D5 to D8 are diodes.

Since the door locking and unlocking device for preventing forgetting to remove the key according to the present invention has the above-described structure and operation, it has the following effects.

That is, in an existing door locking/unlocking device that includes a door locking/unlocking switch, a door locking/unlocking control circuit activated by the operation of the door locking/unlocking switch, an electromagnetic actuator, and a timer circuit, Since a key switch, a door switch, and an AND logic circuit are additionally provided, the door unlocking instruction can be given precisely and quickly.

Furthermore, the device of the present invention can be easily installed in existing devices and vehicles, facilitating its implementation.

In addition, it can be constructed from electronic components such as semiconductor elements, resulting in a simple configuration and reduction in size and weight.

[Brief explanation of the drawing]

The drawing is an electrical circuit diagram showing an embodiment of the door locking and unlocking device for preventing forgetting to remove the key according to the present invention. 1...Door lock/unlock switch, 2...
・Key switch, 3...Door switch, 4...
...AND logic circuit, 5...Timer circuit,
6... Door locking control circuit, 7... Door unlocking control circuit, 9... Electromagnetic actuator.

Claims (1)

[Scope of utility model registration request] A door lock/unlock switch, a door lock/unlock control circuit activated by the operation of the door lock/unlock switch, an electromagnetic actuator driven by the door lock/unlock control circuit, and a door lock/unlock switch for a predetermined period of time. A door locking/unlocking device consisting of a timer circuit that derives a signal for locking/unlocking is equipped with a key switch and a door switch, is operated by signals from the key switch and the door switch, and is capable of forcibly unlocking the door. A door locking and unlocking device for preventing forgetting to remove a key, characterized by comprising an AND logic circuit for deriving a signal to set the state.