JPS5811877Y2 - siyariyoyoudoanosejiyosouchi - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a locking device that electrically locks and unlocks the doors of an automobile, etc. by operating an electromagnetic solenoid, a motor, etc. with a manual switch installed inside the vehicle.

As shown in FIG. 1, a conventionally known locking device has a manual switch 2 which is normally non-conducting and closes with terminal 1a when locked and terminal 2b when unlocked, and coils 31 and 32 are energized when manual switch 2 is closed. It consisted of relays 3A, 3B whose contacts 33, 34 are closed, and a solenoid or motor 4 whose operating direction is reversed in each case when the relays 3A, 3B are operated.

Depending on the case, as a countermeasure against short-circuit failure of the solenoid or manual switch 2 of the motor 4, a breaker using a heat-sensitive element such as a bimetal to detect excessive current or overheating may be installed in series with the load 4. was common.

As the current for solenoids and motors is large, if a driver who is not aware of the manual switch 2 continues to press it for a long time, or if the manual switch causes a short circuit, the battery voltage may drop suddenly and the load may burn out. As a countermeasure, a limit switch that determines whether locking or unlocking is completed may be considered, but this involves problems with installation accuracy and cost, and the sensitivity value of the above-mentioned heat-sensitive element is limited. It has been extremely difficult to expect high reliability due to performance factors such as accuracy and the influence of ambient temperature.

In view of the above-mentioned problems, the present invention has been developed by providing a timer that limits the conduction of the switch means and thus the energization of the drive device within a predetermined time. , automatically shut off to prevent unnecessary power loss.

Another object of the present invention is to provide a vehicle door locking device that is inexpensive and less likely to malfunction, since the power is cut off regardless of the operating time of the manual switch, so there is no need for shutoff means such as a remix switch or breaker. be.

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the device of the present invention shown in the drawings will be described below.

FIG. 2 shows a first embodiment of the present invention, where 1 is a battery and 2 is not electrically connected to terminals 2a and 2b during normal operation.

A manual switch, 3A and 3B are relays, 31.32 are respective relay coils, 33.34 are respective relay contacts, 4 is a motor, 51.52 is a capacitor, and 61 and 62 are discharge resistors.

The operation of the above configuration will be explained.

Since the manual switch 2 is normally disconnected from the terminals 2a and 2b, the coil 31.32 is not energized and the contact 33.3
4 is at ground potential, so the motor 4 does not operate.

When the manual switch 2 is connected to the terminal 2a in the closed state, the coil 3
1 is energized through the capacitor 51 and the contact 33 is connected to the positive potential of the battery 1 and closed, so current flows through the contact 33 and the motor 4 is driven (for example, locked).
.

Since the capacitor 51 is charged with a time constant with the resistance of the coil 31, the energization of the motor 4 is eventually completed, and even if the switch 2 keeps the terminal 2a closed thereafter, the state remains unchanged.

When the manual switch 2 is released, it becomes non-conductive again, so that the charge is transmitted through the resistor 61 and discharged.

Next, when the manual switch 2 is connected to the terminal 2b in a closed state, a bias is applied to the motor 4, contrary to the case described above, so that the condenser 52 and relay coil 32 operate in the opposite direction.
For example, it is unlocked by doing this for a period of time determined by the time constant of .

Next, a second embodiment will be explained with reference to FIG.

71 and 72 are coils of the solenoid 70, each wound in opposite directions, and a solenoid plunger (not shown).
operate in the opposite direction when the respective coils are energized.

(Lock and unlock) Other operations are the same as in the first embodiment.

Although a relay is used as the switch means, a thyristor, a transistor, etc. may also be used.

As described above, in the present invention, first and second switch means are provided whose conduction cutoff state is controlled by a manual switch, and the switch means controls the drive device, and the conduction of the switch means is maintained for a predetermined period of time. Because of the provision of time-limiting means, no unnecessary power loss occurs and the load is not burnt out due to operating conditions or malfunctions of the manual switch.

Furthermore, it has the advantage of being simpler in circuitry and cost-effective than those provided with an overcurrent cut-off breaker or a limit switch.

In addition, the present invention is a manual switch in which the power supply is not connected to any switch means or capacitor at all times.
Since it uses a position type switch, it is possible to completely shut off leakage power from the circuit.

Furthermore, since the manual switch has a neutral position,
This has the advantage that it can be easily adapted to the case where a circuit configuration for automatically opening and closing the door is added.

[Brief explanation of drawings]

FIG. 1 is an electrical circuit diagram showing a conventional vehicle door locking device, and FIGS. 2 and 3 are electrical circuit diagrams showing first and second embodiments of the vehicle door locking device according to the present invention. be. 4.70...Motor and electromagnetic solenoid serving as a drive device, 3A, 3B...In particular, a relay serving as the first and second switch means, 2...Manual switch, 51 .52.61. 62... Particularly resistors and capacitors constituting timing means.

Claims (1)

[Claims for Utility Model Registration] A drive device for unlocking and locking a door; a first switch means having a relay contact that locks the drive device when energized; It has a second switch means having a relay contact for operating the lock, and two terminals connected to the first and second switch means, and the terminal is selected and connected to the power source, and any of the terminals is normally connected to the power source. a manual switch which is not connected to a power source, and two time capacitors, one for the first switch means and one for the second switch means, respectively connected to the power source through respective terminals of the manual switch; The first switch means is energized based only on the charging current of one of the capacitors for time-limiting, and the second switch means is energized based only on the charging current of the other capacitor among the capacitors for time-limiting. A locking device for a vehicle door characterized by energizing the locking device.