JPH0312192B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an automatic door lock control device that automatically releases a door lock based on a signal external to a vehicle.

Conventionally, automatic door lock devices have been known that use radio waves to lock and unlock the outside doors of a vehicle (Japanese Patent Publication No. 1983-1999).
34719 etc.).

For example, a person has a transmitter that emits a signal of a specific frequency, and when a receiver installed in a vehicle receives this signal, the door lock of the outside door is released.

However, with such automatic door lock devices, when a person carrying a transmitter approaches a vehicle equipped with the receiver, the door lock is canceled by receiving the signal from the transmitter. Even when the owner of the vehicle has no intention of getting into the vehicle, the door lock must be unlocked and re-locked, which is not safe or appropriate in terms of crime prevention.

In addition, there is a system that releases the door lock when the photodetector detects infrared rays, but this device requires a manual operation such as positioning the infrared transmitter in the direction of the photodetector, which requires the manual operation to release the door lock. The problem was that it became complicated.

The present invention has been made in view of this problem, and allows the outside door to be unlocked without extra operations only when a person who intends to get into the vehicle is close to the vehicle. The purpose is to reliably maintain the state of the door lock and provide a full function as an automatic door lock.

To this end, the automatic door lock control device of the present invention includes an external transmitter that outputs a specific signal from outside the vehicle, a receiving means that detects this external signal, and a switch that detects the opening of the outside handle attached to the door. A comparison calculation circuit that determines whether the output signal of the receiving means matches a predetermined storage code and generates a drive signal based on the match signal and the outside handle open signal of the front switch; The present invention is characterized in that it includes a door lock drive circuit that releases the door lock that has been previously locked. The output of the door lock drive circuit releases the door lock device, typically a solenoid or the like. FIG. 1 shows an example of the basic configuration of the present invention.

The external transmitter and reception means are, firstly, a combination of a radio signal transmitter and a receiver, or secondly, a transmitting contact electrode plate that contacts a part of the driver's body and a receiver disposed on the outside door handle. It can be constructed from a combination of a contact plate and a received signal amplifier. According to the second combination, the external transmitter and receiving means can be extremely simplified.

According to this configuration, the previously closed door lock is released only when a person in possession of a predetermined external transmitter opens the outside handle to get into the vehicle, so a person unrelated to the vehicle can The door remains locked even when approaching the vehicle, thereby preventing the door from being unlocked simply by approaching the vehicle, and unlike the infrared system, no special operation is required for unlocking.

Moreover, the drive circuit does not operate all the time, but operates when both the signal from the external transmitter and the outside handle open signal are input, so the power supply for operating the drive circuit is turned on only when necessary. used to save power consumption.

Embodiments of the present invention will be described below based on the drawings.

As shown in FIGS. 2 and 3, a limit switch 3 is provided to detect the opening of an outside handle 2 attached to the door 1. The outside handle 2 has a pin 5 fixed to the inside of the door panel 4.
When the handle part 2a housed in the handle case 6 is pulled counterclockwise as shown in the figure, the opposite end part 2b, together with the weight of the counterweight 7, is turned into a limit switch. When the outside handle 2 is rotated by a predetermined angle θ by pushing out the rod 3a of the handle 3 downward, the switch 3 is closed. 8 is a return spring that urges the outside handle 2 to the illustrated state, and 9 is a close signal for the switch 3, which will be described later.
This is a wiring code sent to the CPU (comparison calculation circuit) 10.

On the other hand, for engine keys etc. in the possession of humans,
An external transmitter having a transmitting circuit 11 as shown in FIG. 4 is provided. In this transmitting circuit 11, a signal generating circuit 12 is operated by, for example, a Ni-Cd battery.
The output signal of this signal generation circuit 12 is converted into a radio wave of a predetermined frequency by an oscillation modulation circuit 13, and this radio wave is transmitted from an antenna 14 to an antenna 15.

In the control circuit 16 installed in the vehicle, the external signal from the external transmitter is input to the receiving circuit 17 via the antenna 15, and the output signal of the receiving circuit 17 is sent to the CPU 10 via the waveform shaping circuit 18.

Then, the CPU 10 confirms that the preset reference external signal and the external signal from the external transmitter match, and at the same time determines whether the switch close signal from the above-mentioned outside handle 2 is being input. Then, when both of these predetermined signals are received, a solenoid drive signal is output.

When the solenoid drive circuit 19 receives an output signal from the CPU 10, it energizes the door lock solenoid 20, thereby electromagnetically driving the door hook (not shown) to release it from the lock pin.

In addition, in this embodiment, from switch 3 to CPU 1
The receiver drive circuit 21 for operating the receiver circuit 17 and the waveform shaping circuit 18 is driven only when an outside handle open signal (switch close signal) is input to the input terminal 0. 22 is the CPU
10, a battery that drives the receiving section drive circuit 21 and the like.

Next, the operation of this embodiment will be explained with reference to the flowchart shown in FIG. , the switch 3 closes, and the CPU 10 turns on the power to the receiving circuit 17 via the receiving section drive circuit 21.

At this time, an external signal from a transmitter attached to the engine key is input to the receiving circuit 17, and this signal is sent to the CPU 10 via the waveform shaping circuit 18. The CPU 10 then checks whether this signal matches a preset reference external signal, and if both signals match, the CPU 10 outputs a door lock release signal to the solenoid drive circuit 19.

In this way, when the opening of the outside handle 2 and the predetermined radio waves of the external transmitter are detected,
The CPU 10 operates the solenoid drive circuit 19, and the door lock solenoid 20 is energized to release the door hook from the lock pin.

When the outside handle 2 of the door 1 is not opened, the door is still locked, and even when the outside handle 2 is opened,
If the person who opens the handle does not have a transmitter, or if the person who opens the handle does not have a transmitter but the transmitter frequency does not match the reference setting frequency, the door lock state is maintained.

Therefore, even if a person unrelated to the vehicle approaches the vehicle and attempts to open the door 1, the door lock is securely held and theft within the vehicle interior can be prevented.

In addition, the door lock can be easily released by a person in possession of a designated transmitter pulling and pulling the outside handle 2 of the door 1 to get into the vehicle, and the door lock can also be released for the driver etc. This has the advantage that it does not require complicated operations.

Furthermore, in this embodiment, the outside handle 2
If the transmitter is in the closed state, it will not drive the receiving circuit 17, waveform shaping circuit 18, etc. even if the transmitter is installed close to the vehicle. Power consumption can be reduced.

FIG. 6 shows another embodiment, in which the external transmitter can be built into or attached to the wristwatch, or can be held separately on the arm, finger, or the like. The transmission circuit 30 in the external transmitter is
A signal from the signal generating circuit 12 is sent to a contact plate 31 serving as a wristwatch case, and this external signal (voltage signal) is transmitted to a contact plate 32 serving as an outside handle 2 through the human body. The contact electrode plate 32 receiving this external signal passes through an amplifier 33.
An external signal is input to the CPU 10, and the CPU 10 outputs a door lock release signal to the solenoid drive circuit 19 when a predetermined voltage signal is input. Note that since the voltage applied to the contact plate is minute, it has no effect on the human body.

Also in this embodiment, the contact plate 32 and the amplifier 33 are driven via the power supply circuit 34 only when the outside handle open signal is input to the CPU 10 by closing the switch 3, thereby reducing the power consumption of the battery 22. It is being reduced.

As explained above, according to the present invention, when a person is attempting to open the outside door to board a vehicle, and the person attempting to open the door is in possession of a transmitter that outputs a predetermined external signal. Since the door locks are released only when the outside handle is opened, it not only ensures crime prevention, but also prevents special operations by simply opening the outside handle by the vehicle owner or other related parties. This has the effect that the door lock can be easily released without the need for locking.

[Brief explanation of the drawing]

Fig. 1 is a view corresponding to the claims of the present invention, Fig. 2 is a cross-sectional view of the structure showing an outside handle according to an embodiment of the invention, Fig. 3 is a rear view of the structure also showing the outside handle, and Fig. 4 is the same circuit. FIG. 5 is a flow chart for explaining the operation, and FIG. 6 is a circuit diagram of another embodiment. 1...Door, 2...Outside handle, 3
...Limit Switch (Switch), 10...
CPU, 11...External transmitter (transmission circuit) 16...
...Control circuit, 17...Reception circuit, 19...Solenoid drive circuit, 20...Door lock solenoid,
30...External transmitter.

Claims (1)

[Scope of Claims] 1. An external transmitter that outputs a specific signal from outside the vehicle, a receiving device that detects this external signal, a switch that detects the opening of an outside handle attached to a door, and an output of the receiving device. A comparison calculation circuit that determines whether the signal matches a predetermined stored code and issues a drive signal based on the match signal and the outside handle open signal of the switch; An automatic door lock control device comprising a door lock drive circuit for releasing the door lock. 2. The device according to claim 1, wherein the external transmitter and receiving means comprises a radio wave signal transmitter and a receiver. 3. The device according to claim 1, wherein the external transmitter comprises a signal generating circuit and a contact plate for transmitting its output signal, and the receiving means has a contact plate attached to a part of the vehicle body.