KR960010954B1 - Central door lock to prevent motor burnout - Google Patents

Abstract

None.

Description

Central door lock to prevent motor burnout

1 is an overall circuit diagram of a conventional center door lock.

2 is an overall circuit diagram of a central door lock according to the present invention.

* Explanation of symbols for main parts of the drawings

3: power supply part 6: open side terminal

100: door lock control unit 200: door lock

300: door release control unit 400: door release unit

a, b: relay contact C: capacitor

D: Diode M: Motor

R: Resistance RY: Relay

SW: Driver Switch T: Transistor

U: TTl IC logic gate

The present invention relates to a central door locking device, and more particularly, to a central door locking device which prevents the burnout of a motor by applying a load only once and then no load thereafter even if the driver switch is defective or the switch is operated to one side. will be.

The conventional center door lock device has a second, third, fourth and fifth transistors T2 when the driver switch SW is in a central state where the driver switch SW is not connected to the locked or open side terminal as shown in FIG. Since both T3, T4 and T5 are turned off, both relays RY1 and RY2 are turned off. Therefore, the power supply 4 is simultaneously applied to both ends of the motor M. Will not rotate. When the driver switch SW is connected to the locked side terminal 7, the fourth transistor T4 is turned on and then the second transistor T2 is turned on to the first relay RY1 coil. Current flows Therefore, the first relay RY1 is connected from the contact a1 to the contact b1 so that the power supply unit 3 and the terminal 2 of the motor M are connected. In addition, since the third transistor T3 is turned off after the fifth transistor T5 is turned off, the second relay RY2 continues to maintain the contact point a2, so that the terminal 1 of the motor M is connected to the power supply portion. In connection with (4), the motor M is driven to the locked side and not to the open side. In this case, by the time constant of C4 and R13, the motor M can be driven until the door is locked, and then the first relay RY1 contact is reduced back to a1 state. In addition, when the driver switch SW is connected to the open side terminal 6, the second transistor T2 is turned off after the fourth transistor T4 is turned off, so that current flows in the first relay RY1. Is blocked. Therefore, since the first relay RY1 maintains the contact a1, the power supply unit 3 and the motor M are short-circuited. Further, the third transistor T3 after the fifth transistor T5 is turned on. ) Is turned on so that current flows through the coil of the second relay RY2. Accordingly, the second relay RY2 is connected from the contact a2 to the contact b2 so that the power supply unit 3 and the motor M are connected, so that the motor M is driven toward the open side.

However, the conventional center door locking device as described above is a switching circuit using a transistor, which is connected to a driver switch and the terminal of the locked (open) side is disconnected or the signal of the driver switch continues to the locked (open) side. If the driver switch is connected to the locked (open) side terminal when the driver is in the in state, the motor will be driven to the locked (open) side, but the motor will not be driven to the open (locked) side even after contacting the open (locked) terminal again. The door of the vehicle cannot be opened (closed). In addition, when the driver continuously operates the driver switch SW in the above state, the motor is constrained and current flows only to one side (locked side or open side). Therefore, when such a phenomenon is caused for a long time, there is a problem in that the motor is overloaded, and the motor and the central door lock are damaged.

Therefore, the present invention has been invented to solve the above problems, the malfunction of the driver switch due to contact failure and disconnection and the overload of the actuator motor is prevented from being damaged by the motor and the central door locking device, of course, The purpose of the present invention is to provide a central door lock device for preventing the burnout of the motor which is normally operated immediately without replacing the motor when the bad state of the driver switch is eliminated.

According to another object of the present invention, when the driver switch is in a bad state, even if the driver repeatedly operates the driver switch, the motor is not energized in any direction so that the center of the motor or the central door lock can be prevented from being burned out. It is to provide a door lock.

In addition, another object of the present invention is to provide a central door locking device having a high reliability with a relatively small number of components compared to the conventional central door locking device.

The present invention for achieving the above object is characterized by the configuration of a switching circuit using a TTL IC logic circuit (NOT gate) for the central door lock device composed of a switching circuit using a transistor.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

According to the present invention, as shown in FIG. 2, the driver switch SW is installed at one side of the vehicle door or the driver's seat to generate a switching signal for opening and closing the vehicle door, and the lock signal of the driver switch SW is judged to determine the door. The door lock control unit 100 for controlling the confinement driving operation of the door, the door release control unit 200 for controlling the release driving operation of the door by determining the release signal of the driver switch SW, and the door lock control unit 100. The door locking unit 300 for locking the door according to the lock driving control signal of the door release unit 400 for releasing the door according to the release driving control signal of the door release control unit 200.

The door lock control unit 100 is connected to an input terminal of the first logic gate U4 capable of generating a signal at one end of the locking side terminal of the driver switch SW, and the first logic gate U4. The input terminal of the second logic gate U6 is connected to the output terminal of the second logic gate U6 via a resistor R3. The input terminal of the third logic gate U3 is connected to the output terminal of the second logic gate U6 via a capacitor C8. It is connected.

In addition, an input terminal of the fourth logic gate U5 capable of inverting a signal is connected to one end of the open side terminal of the driver switch SW, and the fourth logic gate U5 is connected to the door release control unit 200. An input terminal of the fifth logic gate U1 is connected to an output terminal of the fifth logic gate U1 through a resistor R4, and an input terminal of the sixth logic gate U2 is connected to an output terminal of the fifth logic gate U1 through a capacitor C9. It is connected.

In addition, the door lock part 300 includes a transistor T6 connected to an output terminal of the third logic gate U3 of the door lock control part 100 through a resistor R10 to perform a switching operation, and the transistor T6 A relay switch RY1 connected to one end and performing a switching action is provided. In addition, the door release unit 400 includes a transistor T7 connected to an output terminal of the sixth logic gate U2 of the door release control unit 200 via a resistor R11 to perform a switching operation, and the transistor T7. A relay switch RY2 is connected to one end of the switch to perform a switching action.

In addition, a driving motor M is connected between the switching contacts of the relay switches RY1 and RY2.

Next, the operational effects of the present invention having the above configuration will be described.

As shown in FIG. 2, the operation of the present invention is based on the first logic gate U4 of the door lock control unit 100 when the driver switch SW is in an intermediate state not connected to the locked or open side terminal. When the input goes high, the input of the second logic gate U6 goes low. Then, since the output of the second logic gate U6 is high, the input of the third logic gate U3 goes high, and the output of the third logic gate U6 goes low. Therefore, since the first transistor T6 of the door lock part 300 is turned off, the first relay RY1 is continuously connected to the contact a1 so that the power supply part 4 and the terminal 2 of the motor M are closed. OPEN. On the other hand, the input of the fourth logic gate U5 of the door release control unit 200 becomes high and the input of the fifth logic gate U1 goes low. Then, since the output of the fifth logic gate U5 is low, the input of the sixth logic gate U2 becomes high and the output of the sixth logic gate U2 becomes low. Therefore, since the seventh transistor T7 of the door release part 400 is turned off, the second relay RY2 is continuously connected to the contact a2 so that the power supply 4 and the terminal 1 of the motor M are open. Therefore, since the first relay RY1 and the second relay RY2 both maintain the contacts a1 and a2 at both ends of the motor M, the motor is not driven.

However, when the driver switch SW is connected to the locked side terminal 7, the input of the fourth logic gate U5 is turned low, and the high output of the fourth logic gate U5 is the fifth logic gate U1. ) Will be input. Then, when the low output of the fifth logic gate U1 becomes the input of the sixth logic gate U2, the output of the sixth logic gate U2 becomes high and the seventh transistor T7 becomes on-relative. Accordingly, the second relay RY2 is driven to connect the power supply unit 3 and the motor M so that the motor M is driven to the locked side. On the other hand, the high output of the fourth logic gate U5 becomes the input of the third logic gate U3 via the seventh capacitor C7 and the output of the third logic gate U3 becomes low so that the sixth transistor (T6) is turned off. Therefore, the first relay RY1 is not driven and the power supply unit 3 and the motor M are turned off, so that the motor is not driven.

However, if the driver switch SW is connected to the open side terminal 6, the input of the first logic gate U4 is turned low and the high output of the first logic gate U4 is set to the second logic gate. U4). After that, the low output of the second logic gate U6 becomes the input of the third logic gate U3, and the output of the third logic gate U3 becomes high so that the sixth transistor T6 is turned on. Accordingly, the first relay RY1 is driven to connect the power supply unit 3 and the motor M so that the motor M is driven toward the open side. On the other hand, the high output of the fourth logic gate U4 becomes the input of the sixth logic gate U2 via the sixth capacitor C6, and the output of the sixth logic gate U2 becomes low so that the seventh transistor ( T7) is turned off. Accordingly, the second relay RY2 is not driven, and the power supply unit 3 and the motor M are short-circuited and the motor is not driven.

However, if an abnormal condition occurs, for example, when the locked terminal 7 is disconnected, the driver switch SW is initially connected to the open side terminal 6 to operate normally as described above. In addition, the low input of the first logic gate U4 continues to maintain the low output of the sixth logic gate U2 via the sixth capacitor C6 when it comes into contact with the open terminal 6 again. Since it is not driven, the burnout of the motor is prevented.

As described above, the present invention is composed of a switching circuit using a TTL IC logic circuit (NOT gate), thereby preventing the motor from being burned out. Only when the motor is loaded, there is an effect that the load is not caught thereafter.

Claims (1)

In the door lock device of the vehicle door is provided with a door release unit 200 and the door release unit 400 to open and close the door using a motor (M), the transistor (T6) of the door release unit 200 A third logic gate U3 connected to perform a signal inversion, a second logic gate U6 connected to one end of the third logic gate U3 and in a signal inversion, and the second logic gate U6 A first logic gate U4 connected to one end of the N) to perform a signal inversion, a sixth logic gate U2 connected to one end of the transistor T7 of the door release unit 400 to perform a signal inversion, and A fifth logic gate U1 connected to one end of the sixth logic gate U2 and performing signal inversion, and a fourth logic gate connected to one end of the fifth logic gate U1 and performing a signal inversion; U5) and an output terminal of the fourth logic gate U5 and an output terminal of the fifth logic gate U1 are connected to the capacitor C6 and the 4 logic gates central door locking device for preventing damage of the motor which comprises a capacitor (C7) is connected between the output terminal of the output stage and a second logic gate (U6) of (U5).