JPH0457834B2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an automobile door lock device,
In particular, the present invention relates to a door lock device suitable for use in automobiles employing a multiplex transmission system.

In recent years, various door lock devices have been developed that can automatically lock or unlock the lock knobs provided on each door of an automobile by operating a door lock switch provided near the driver's seat. , has been put into practical use.

Both FIGS. 1 and 2 are diagrams showing an example of the structure of this type of door lock device. In FIG. 1, 1 is a lock knob installed on the door of a car, 2 is a motor that moves this lock knob up and down, 3 is a lock knob switch whose contacts change in response to the operation of lock knob 1, and motor 2 is a lock knob that moves the lock knob up and down. Both knob switches 3 are provided near the lock knob 1.
Further, 4a and 4b are interlocking door lock switches (manual switches) installed near the driver's seat, 5 is a battery, and a cable 6a is connected between the door lock switches 4a and 4b and the lock knob switch 3. , 6b. Note that the figure (solid line) shows the case where the lock knob 1 is in the unlocked state.

In the above configuration, the door lock switch 4
When the terminals a and 4b are applied to the lock side terminal L (see broken line), the positive voltage of the battery 5 is supplied to the motor 2 via the switch 4b, the cable 6a, and the switch 3, thereby causing the motor 2 to rotate. motor 2
When the lock knob 1 rotates, the lock knob 1 descends and becomes locked, and the lock knob switch 3 is switched to the lock side terminal L. When the lock knob switch 3 is switched, the connection between the cable 6a and the motor 2 is turned off, and the rotation of the motor 2 is stopped. Also,
When the door lock switches 4a and 4b are turned on to the unlock side terminal U, the positive voltage of the battery 5 is supplied to the motor 2 via the switch 4b, the cable 6b, and the switch 3. As a result, the motor 2 rotates, the lock knob 1 becomes unlocked, and the lock knob switch 3 is switched to the unlock side terminal U. Note that the door lock device described above uses motor 2.
The direction of rotation of the lock knob 1 is always constant, and the direction of movement of the lock knob 1 is switched by mechanical means.

In FIG. 2, the direction of rotation of the motor 2 is changed according to the operation of door lock switches 7a and 7b.
When the voltage is applied to the lock side terminal L, the positive voltage of the battery 5 is supplied to the terminal 2a of the motor 2 via the switch 7a and the cable 8a, and the ground potential is supplied to the terminal 2b of the motor 2 via the switch 3. be done. As a result, the motor 2 rotates forward, the lock knob 1 becomes locked, and the lock knob switch 3 is switched to the lock side terminal L (see the broken line). Conversely, when the door lock switches 7a and 7b are turned on to the unlock side terminal U, the positive voltage of the battery 5 is supplied to the terminal 2b of the motor 2 via the switch 7b, the cable 8b, and the switch 3; A ground potential is supplied to the motor 2a via the switch 7a and the cable 8a, whereby the motor 2 is reversely rotated and the lock knob 1 is brought into the unlocked state.

On the other hand, in recent automobiles, cables (for example, cables 6a and 6 in FIGS. 1 and 2)
In order to reduce the number of signals (b, 8a, 8b, etc.), a multiplex transmission method is being adopted in which multiple signals are superimposed and transmitted on one cable. 3 and 4 are circuit diagrams showing the case where the door lock devices shown in FIGS. 1 and 2 are configured by a multiplex transmission system, respectively. In these figures, 10 is a door lock switch, and 11 is a door lock switch. A multiple signal transmitting circuit 13 outputs a signal corresponding to the switching state of the door lock switch 10 to the cable 12, and a multiplex signal transmitting circuit 13 detects the switching state of the switch 10 based on the signal supplied via the cable 12, and transmits a signal corresponding to the switching state of the door lock switch 10 based on the signal supplied via the cable 12. relay R ₁ , R ₂
This is a multiplex signal receiving circuit that drives the. In the circuit shown in FIG. 3, when the door lock switch 10 is turned on to the lock side terminal L, the multiplex signal receiving circuit 13 detects this and puts both relays R ₁ and R ₂ into an excited state. This allows relay R ₁ ,
The contacts r1 and r2 of _R2 are in the state shown by broken lines in the figure. Further, when the door lock switch 10 is turned on to the unlock side terminal U, the multiple signal receiving circuit 13 de-energizes the relays R ₁ and R ₂ .
As a result, the contacts r1 and r2 are in the state shown by the solid lines. Accordingly, the lock knob 1 is driven in the same manner as the circuit shown in FIG. 1 by the operation of the contacts r1 and r2 described above. Also, in the circuit shown in FIG. 4, when the door lock switch 10 is turned on to the lock side terminal L, the control circuit 13 turns both relays R ₁ and R ₂ into an excited state, as in the circuit shown in FIG. Further, when the door lock switch 10 is turned on to the unlock side terminal U, both the relays R ₁ and R ₂ are de-energized. As a result, lock knob 1
is driven in the same way as in the circuit shown in FIG.

Incidentally, it is necessary that a door lock device for an automobile can be used even when the ignition key switch is turned off. Therefore, in order to reduce battery consumption, the power consumption of the door lock device must be minimized as much as possible. However, the devices shown in Figures 3 and 4 are
Since R ₁ and R ₂ are used, there is a problem in that power consumption is large. In other words, relays R ₁ and R ₂ need to turn on/off the current of motor 2, and if reliability is also taken into account, the contact capacity will vary from several tens of mA to several tens of mA.
A coil current of 100mA is required. Also,
The coil currents of relays R ₁ and R ₂ continue to flow even after the motor 2 stops rotating when the door lock switch 10 is in the locked state. As a result, relay R ₁ ,
Power consumption due to R ₂ becomes large.

Therefore, in order to reduce the power consumption by these relays R ₁ and R ₂ , it is conceivable to use latching relays that can be driven by pulse current as relays R ₁ and R ₂ . However, latching relays are expensive and have reliability problems in environments with strong vibrations, such as in automobiles. Also, you can insert a timer circuit etc. and relay
Automatically turn off R ₁ and R ₂ after a certain period of time,
Although it is conceivable to separately provide a switch for detecting the position of the lock knob, this has the drawback of complicating the circuit configuration.

In view of the above-mentioned circumstances, the present invention provides an automobile door lock device which has a simple structure, low power consumption, and is extremely resistant to vibrations. lock knob switching means for shifting the lock knob to the locked state, and for shifting the lock knob to the unlocked state by means of a driving means when the lock knob is in the locked state;
A door lock device for an automobile equipped with a lock knob switch which is inserted in series with the drive means and whose contacts change according to the operation of the lock knob, which has a lock side terminal and an unlock side terminal, and is installed at one place in the driver's seat of the automobile. a door lock switch located;
A multiplex signal transmitting circuit that outputs signals corresponding to the locking side and unlocking side of the door lock switch, and a first thyristor inserted between the unlocking side terminal of the lock knob switch and the battery. and a second thyristor inserted between the lock side terminal of the lock knob switch and the battery, and generates a gate pulse to be supplied to the first thyristor and the second thyristor based on the supplied signal. The gate pulse generating means is configured to supply a gate pulse to the first thyristor when the door lock switch is turned on to the lock side terminal, and when the door lock switch is turned on to the unlock side terminal. In this case, a multiplex signal receiving circuit is provided which supplies a signal that causes the second thyristor to supply a gate pulse, and the multiplex signal transmitting circuit is arranged near the door lock switch, and the first thyristor, the second thyristor , the gate pulse generating means and the multiple signal receiving circuit are arranged in each of all the doors.

Embodiments of the present invention will be described below with reference to the drawings. 5 and 6 are circuit diagrams showing the configurations of the first and second embodiments of this device 1, respectively. In these figures, the parts corresponding to the parts in FIGS. 3 and 4 are shown. The same reference numerals are given, and the explanation thereof will be omitted. FIG. 5 is a diagram showing a door lock device having the same function as that shown in FIG.
7. A series circuit consisting of a capacitor 18 and a series circuit consisting of a resistor 19 and a capacitor 20 are protection circuits for the thyristors 15 and 16, respectively, and symbols 21 and 22
are gate pulse generation circuits that drive the gates of the thyristors 15 and 16, respectively.

In the circuit shown in FIG. 5, when the door lock switch 10 is turned on to the lock side terminal L, the multiple signal receiving circuit 13 detects this and outputs a signal S ₁ to the gate pulse generating circuit 21. The gate pulse generation circuit 21 receives this signal _S1 and outputs a gate pulse signal for the thyristor 15 for a short time. As a result, the thyristor 15 is turned on, the positive voltage of the battery 5 is supplied to the motor 2 via the thyristor 15 and the lock knob switch 3, and the motor 2 rotates. When the motor 2 rotates, the lock knob 1 descends to the locked state, and the contact point of the lock knob switch 3 is switched to the lock side terminal L. When switch 3 is switched, thyristor 15
The circuit on the cathode side of is turned off, and therefore the current of thyristor 15 becomes less than the holding current, and thyristor 15 is turned off. Further, when the door lock switch 10 is turned on to the unlock side terminal U, the control circuit 13 outputs a signal S ₂ to the gate pulse generation circuit 22. The gate pulse generation circuit 22 receives this signal _S2 and outputs a gate pulse signal for the thyristor 16. As a result, the thyristor 16 turns on, the motor 2 rotates, the lock knob 1 becomes unlocked, and the switch 3 is switched to the unlocked side. When the switch 3 is switched, the circuit on the cathode side of the thyristor 16 is cut off, so that the thyristor 16 is turned off.

Next, FIG. 6 shows a door lock device having the same function as that shown in FIG. 4, and in this figure, reference numeral 24 is a diode. This sixth
In the circuit shown in the figure, the door lock switch 10
When input to the lock side terminal L, the control circuit 13 outputs the signal _S1 , and accordingly, the gate pulse generation circuit 21 supplies a pulse signal to the gate of the thyristor 15, and the thyristor 15 is turned on. . As a result, terminal 2 of motor 2
Current flows from terminal a to terminal 2b, motor 2 rotates forward, lock knob 1 becomes locked, and switch 3 is switched to the lock side. When the switch 3 is switched, the current flowing through the thyristor 15 is cut off by the diode 24, and as a result, the current in the thyristor 15 becomes less than the holding current, and the thyristor 15 is turned off. When the door lock switch 10 is turned on to the unlock side terminal U, the control circuit 13 outputs a signal _S2 , the gate pulse generation circuit 22 outputs a pulse signal, and the thyristor 16 is turned on. As a result, the positive voltage terminal of battery 5 → diode 24
A current flows through the path of → switch 3 → motor 2 → thyristor 16 → ground, the motor 2 reverses, the lock knob 1 becomes unlocked, and the switch 3 is switched to the unlock side. When the switch 3 is switched, the above-mentioned current path is cut off, and therefore the thyristor 16 is turned off.

In the above embodiment, the motor 2 is used as a drive means for driving the lock knob, but a solenoid or the like may be used instead.

As explained above, according to the present invention, when the lock knob is in the unlocked state, the lock knob is moved to the locked state by the driving means, and when the lock knob is in the locked state, the lock knob is moved by the driving means. An automobile door lock device includes a lock knob switching means for shifting to an unlocked state, and a lock knob switch inserted in series with a driving means and whose contacts are switched in response to operation of the lock knob, which has a lock side terminal and an unlock side terminal. A door lock switch placed in one place in the driver's seat of a car, a multiplex signal transmission circuit that outputs signals corresponding to each of the locking and unlocking of the door lock switch, and the lock knob. a first thyristor inserted between the unlock side terminal of the switch and the battery; a second thyristor inserted between the lock side terminal of the lock knob switch and the battery;
A gate pulse generating means generates a gate pulse to be supplied to the first thyristor and the second thyristor based on the supplied signal, and a door lock switch is connected to the lock side terminal of the gate pulse generating means. In this case, the first thyristor is supplied with a gate pulse, and when the door lock switch is turned on to the unlock side terminal, the second thyristor is supplied with a gate pulse.
a multiplex signal receiving circuit for supplying a signal for supplying a gate pulse to the thyristor; the multiplex signal transmitting circuit is disposed near the door lock switch;
Since the first thyristor, the second thyristor, the gate pulse generating means, and the multiple signal receiving circuit are arranged in each of all the doors, the following advantages can be obtained.

Better vibration resistance than when controlled by relays.

Since the power for driving the thyristor (gate power) is extremely small compared to the power for driving the relay coil, power consumption can be much reduced.

It does not require a special circuit (commutation circuit) to turn off the thyristor, nor does it require a circuit to turn off the relay after a certain period of time, such as a timer circuit, which is required when using a relay. , As a result, the circuit configuration becomes simple.

Compared to the case of using relays, the number of wiring can be reduced, and therefore the man-hours for wiring, soldering, etc. can be reduced.

Since the door lock switch is provided near the driver's seat, the locking and unlocking states of all the door lock knobs can be centrally operated from the driver's seat. Since the door lock switch and each drive means for driving each lock knob are connected by multiplex transmission, it is possible to suppress an increase in the number of wires between each drive means that would occur when using this multiplex transmission.

[Brief explanation of the drawing]

1 and 2 are circuit diagrams each showing a configuration example of a conventional door lock device, FIGS. 3 and 4 are circuit diagrams each showing a configuration example of a door lock device using a conventional multiplex transmission method, and FIG. FIG. 6 is a circuit diagram showing the configuration of the first and second embodiments of the present invention, respectively. 1...Lock knob, 2...Motor, 3...Lock knob switch, 10...Door lock switch,
15, 16... Thyristor, 21, 22... Gate pulse generation circuit.

Claims (1)

[Scope of Claims] 1 When the lock knob is in the unlocked state, the lock knob is moved to the locked state by the driving means, and when the lock knob is in the locked state, the lock knob is brought into the unlocked state by the driving means. A door lock device for an automobile comprising a lock knob switching means for shifting the lock knob, and a lock knob switch inserted in series with the driving means and having a contact point switched in response to the operation of the lock knob, the door lock device having a lock side terminal and an unlock side terminal. , a door lock switch disposed at one location of the driver's seat of an automobile; and turning the door lock switch to the lock side;
a multiple signal transmission circuit that outputs a signal corresponding to each input to the unlock side; a first thyristor inserted between the unlock side terminal of the lock knob switch and the battery; and the lock side of the lock knob switch. a second thyristor inserted between a terminal and the battery; and gate pulse generating means for generating a gate pulse to be supplied to the first thyristor and the second thyristor based on the supplied signal. For the gate pulse generation means, when the door lock switch is turned on to the lock side terminal, the first thyristor is caused to supply a gate pulse, and when the door lock switch is turned on to the unlock side terminal, the gate pulse is supplied to the first thyristor. a multiplex signal receiving circuit that supplies a signal that causes the second thyristor to supply a gate pulse; the multiplex signal transmitting circuit is disposed near the door lock switch; A door lock device for an automobile, characterized in that the second thyristor, the gate pulse generating means, and the multiple signal receiving circuit are arranged in each of all the doors.