KR20080000265U - Apparatus for operating a door lock of the vehicle - Google Patents

Abstract

The present invention relates to a car door lock driving device, the car door lock driving device for controlling the opening and closing of the car door by controlling the forward or reverse rotation of the motor according to the present invention, in response to the input signal applied A monostable MV unit for outputting a first level state signal for a period of time, and for outputting a second level state signal different from the first level state signal outside the predetermined time period; In order to cut off the leakage current of the monostable MV unit during the time that the second level status signal is output from the monostable MV unit, it is connected to the power terminal of the vehicle battery to control whether the supply voltage of the monostable MV unit is supplied. Wealth; At least one of supplying an operating voltage to the relay through a switch for controlling the application of the input signal and the operating voltage to the monostable MV unit and switching the operating voltage supplied to the monostable MV unit through the blocking unit. A switching unit having switches; And a relay unit which operates by supplying an operating voltage by the switching operation of the switching unit and which rotates the motor forward or reversely. According to the present invention, the dark current can be reduced to prevent discharge of the battery, and chattering can be prevented or minimized through reference voltage variation.

Automotive Door Lock, Relay, Monostable Multivibrator, Switch

Description

Apparatus for operating a door lock of the vehicle}

The present invention relates to an automobile door lock driving apparatus, and more particularly, to an automobile door lock driving apparatus capable of reducing dark current and preventing chattering.

In general, a vehicle is equipped with a door lock for controlling the opening and closing of the door. Therefore, when the driver operates the door lock knob mounted on the inner side of the door, the door is operated as the motor is rotated forward or reverse by the door lock driving device to control the opening and closing of the door.

Such an automobile door lock driving device is used to drive a motor that opens and closes an automobile door by a switch attached to an automobile.

Examples of the conventional automobile door lock driving device are disclosed in Korean Patent Nos. 289560 and 2,773,572.

In Patent No. 289560, a monostable multivibrator (hereinafter, referred to as 'monostable MV') is composed of a resistor, a capacitor, and a transistor to implement an automobile door lock driving circuit. The characteristics are improved using a capacitor and a comparator.

1 shows an example of a general vehicle door lock driving apparatus.

As shown in FIG. 1, a general vehicle door lock driving device 10 includes a plurality of door open / close switches SW0, SW1 and SW2, a monostable MV 12, a relay 14, and a relay drive switch SW3. do.

The door opening / closing switches SW0, SW1, and SW2 are opened and closed by an operation of a door lock knob mounted on an inner surface of the vehicle. The switch SW0 of the door open / close switches SW0, SW1, and SW2 is provided between the positive terminal B1 + of the battery of the vehicle and the clock input terminal CLK of the monostable MV 12. The input signal level of the clock input terminal CLK is switched.

Among the door open / close switches SW0, SW1, and SW2, a switch SW1 and a switch SW2 are provided between the positive terminal B1 + of the battery of the vehicle and the relay 14 to supply power to the relay. Switch.

The monostable MV 12 is a circuit in which only one signal state of low or high is stabilized after a predetermined time, and changes to a stable signal state after a predetermined time. The monostable MV 12 outputs the output terminal OUT to a second level state (eg, 'LOW') before an input signal (eg, a 'HIGH' signal) enters the clock input terminal CLK. However, when the input signal (for example, the 'HIGH' signal) is input to the clock input terminal CLK, the output terminal OUT becomes a first level state (for example, the 'HIGH' state). . In addition, the signal of the clock input terminal CLK is changed from a high state to a low state, and after a predetermined time, the output terminal OUT returns to a second level state LOW. The stable state is a second level state LOW.

The monostable MV 12 has a structure that is always connected to the power supply terminals (B1 +, B2-) of the battery.

In the present invention for convenience, the first level state is defined as HIGH and the second level state will be described as defined as LOW. However, it is apparent that the first level state may be defined as a low state and the second level state may be defined as a high state.

The relay 14 receives the motor driving voltage supplied through the battery by the switching operation of the relay driving switch SW3 and the door open / close switches SW0, SW1, and SW2 to supply the motor power supply terminals S1 and S2. By supplying the motor through the motor to control the driving of the motor.

The relay drive switch SW3 is provided between the relay 14 and the negative terminal B2- of the vehicle battery, and switching is controlled by the output OUT of the monostable MV 12.

The overall operation is as follows.

First, the output of the monostable MV 12 before the switch SW0 connected to the clock input terminal CLK of the monostable MV 12 is turned on among the plurality of switches SW0, SW1, and SW2. OUT becomes the second level state LOW state, and the relay drive switch SW3 controlled by the output OUT of the monostable MV 12 has an OFF state. Therefore, even when the switch SW1 or the switch SW2 of the plurality of switches SW0, SW1, and SW2 is ON, the relay drive switch SW3 is in an OFF state, and thus the relay is not driven. Does not move.

When the switch SW0 is turned ON and the HIGH signal is applied to the clock input terminal CLK of the monostable MV 12, the output OUT of the monostable MV 12 is constant for a predetermined time. In this state, the relay driving switch SW3 is turned ON. In this case, when the switch SW1 or the switch SW2 is turned on, the relay 14 is driven and the motor driving voltage is supplied through the motor power supply terminals S1 and S2 to drive the motor. Therefore, the door is opened and closed.

At this time, in order to protect the motor, the output OUT of the monostable MV 12 is maintained at a high state for about 0.5 seconds immediately after the switch SW0 is turned off. That is, when the switch SW0 is turned ON, the output of the monostable MV 12 goes high, and even after the switch SW0 is turned off, the monostable MV 12 is turned on for about 0.5 seconds. Output OUT remains high.

Therefore, the switch SW0 is turned off and the switch SW1 or the switch SW2 should be turned on immediately. After the time has passed and the relay drive switch SW3 is turned off, the relay 14 does not operate even if the switch SW1 or the switch SW2 is turned on.

In the case of the conventional vehicle door lock driving device, a dark current is generated a lot. That is, even when the motor is not driven, it has a structure in which power is supplied to the monostable MV or the motor, which causes battery discharge.

Accordingly, it is an object of the present invention to provide a vehicle door lock driving apparatus that can overcome the above-mentioned conventional problems.

Another object of the present invention is to provide a vehicle door lock driving device that can reduce the dark current.

Still another object of the present invention is to provide an automobile door lock driving apparatus capable of preventing or minimizing chattering.

Another object of the present invention is to provide an automobile door lock driving device with improved efficiency.

According to the embodiments of the present invention for achieving some of the technical problems described above, the vehicle door lock driving device for controlling the opening and closing of the car door (door) by controlling the forward or reverse rotation of the motor according to the present invention, A monostable MV unit for outputting a first level state signal for a predetermined time in response to an input signal, and for outputting a second level state signal different from the first level state signal other than the predetermined time; In order to cut off the leakage current of the monostable MV unit during the time that the second level status signal is output from the monostable MV unit, it is connected to the power terminal of the vehicle battery to control whether the supply voltage of the monostable MV unit is supplied. Wealth; At least one of supplying an operating voltage to the relay through a switch for controlling the application of the input signal and the operating voltage to the monostable MV unit and switching the operating voltage supplied to the monostable MV unit through the blocking unit. A switching unit having switches; And a relay unit which operates by supplying an operating voltage by the switching operation of the switching unit and which rotates the motor forward or reversely.

The blocking unit may be configured to control at least one switching element controlled by the output signal of the monostable MV unit, and to operate the at least one switching element to determine whether to supply the operating voltage of the monostable MV unit. At least two switching elements may be provided including one switching element.

The at least two switching elements may be transistors.

In the vehicle door lock driving apparatus, when the switch for controlling whether the input signal and the operating voltage are applied to the monostable MV unit is turned off, the operating voltage supplied through the blocking unit affects the clock input terminal of the monostable MV unit. At least one diode may be further provided so as not to extend.

The monostable MV unit includes: a time delay generator including a transistor controlled by an input signal applied by switching of the switching unit, and a capacitor configured to perform charging or discharging according to whether the transistor is turned on or off; A reference voltage generator for supplying a reference voltage having a predetermined level by operating voltages supplied through the blocking unit and the switching unit through voltage distribution using a resistor; The control unit may include at least two comparators that are feedbacked to each other to compare the output of the time delay generator with the reference voltage of the reference voltage generator to generate a corresponding output to the blocking unit, and may include a Schmitt trigger unit having hysteresis characteristics.

The vehicle door lock driving apparatus may further include a reverse voltage protection part provided with at least one diode to protect the blocking part from a reverse voltage generated when the relay part is driven.

According to the present invention, the dark current can be reduced to prevent discharge of the battery, and chattering can be prevented or minimized through reference voltage variation. Therefore, efficient vehicle door lock driving is possible.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings without any intention other than to provide a thorough understanding of the present invention to those skilled in the art.

2 shows an implementation circuit diagram of a vehicle door lock driving apparatus according to an embodiment of the present invention.

As shown in FIG. 2, the vehicle door lock driving apparatus 100 according to the embodiment of the present invention includes a monostable MV unit 110, a blocking unit 120, a switching unit 150, and a relay unit 140. Equipped. In addition, the reverse voltage protection unit 130 may be provided.

The monostable MV unit 110 outputs a first level signal for a predetermined time in response to an applied input signal, and outputs a second level signal different from the first level signal outside the predetermined time.

For example, the output terminal OUT maintains a second level state (for example, 'LOW') before the input signal (for example, the 'HIGH' signal) enters the clock input terminal CLK. When the input signal (for example, a 'HIGH' signal) is input to the clock input terminal CLK, the output terminal OUT becomes a first level state (for example, a 'HIGH' state). The signal of the clock input terminal CLK is changed from a high state to a low state, and after a predetermined time, the output terminal OUT returns to a second level state LOW. The stable state is a second level state LOW. In the drawing, the clock input terminal CLK is connected to the switch SW0, and the output terminal OUT is connected to the resistor R6.

The monostable MV unit 110 includes a time delay generator 112, a reference voltage generator 114, and a Schmitt trigger unit 116. This will be described later.

The blocking unit 120 is connected to the power terminals B1 + and B2- of the vehicle battery to cut off the leakage current of the monostable MV unit during the time that the second level signal is output, and thus the operating voltage of the monostable MV unit. Control the supply of

When the second level state signal is output from the monostable MV unit 110, the blocking unit 120 cuts off the operating voltage supplied to the monostable MV 110, and the monostable MV unit 110 is provided. When the first level state signal is outputted at, the operating voltage supplied to the monostable MV 110 is not cut off. The blocking unit 120 may include at least two switching elements Q2.Q3 for this purpose. The switching elements Q2 and Q3 may be BJT transistors, but may also be MOS transistors.

That is, the blocking unit 120 controls the operation by operating at least one switching element Q2 and the at least one switching element Q2 controlled by the output signal of the monostable MV unit 110. At least one switching element (Q3) for determining whether to supply the operating voltage of the monostable MV unit 110 may be provided. In addition, a plurality of resistors R6, R7, R8, and R9 may be provided, including resistors R6 and R9 for preventing leakage currents of the switching elements Q2 and Q3.

The switching unit 150 supplies the switch SW0 and the blocking unit 120 to control the application of the input signal and the operating voltage to the monostable MV unit 110 to the monostable MV unit 110. At least one switch (SW1, SW2) for supplying the operating voltage to the relay unit 140 by switching the operating voltage is provided.

The relay unit 140 operates by supplying an operating voltage by the switching operation of the switching unit 150 to generate a motor voltage for forward or reverse rotation of the motor.

The reverse voltage protection unit 130 is to protect the circuit of the blocking unit 120 from the reverse voltage when the relay unit 140 is driven, and may include at least one diode (D2, D3). .

In addition, when the switch SW0 is turned off, the diode D1 may be provided to prevent the operating voltage from affecting the clock input terminal CLK of the monostable MV unit 110 through the blocking unit 120. Can be. The capacitor C1 may be provided to absorb noise generated at the moment of switching between the diode D1 and the transistor Q3.

The operation is as follows.

First, when the switch SW0 is ON, the monostable MV unit 110 operates while the operating voltage is supplied to the monostable MV unit 110 through the diode D1, and at the same time, the monostable MV unit ( The input signal HIGH is applied to the clock input terminal CLK of the 110, and the output OUT of the monostable MV unit 110 becomes the first level status signal HIGH.

Accordingly, the transistor Q2 of the blocking unit 120 is turned on, and as the transistor Q2 is turned on, the transistor Q3 is also turned on. Accordingly, the operating voltage of the vehicle battery is supplied to the switching unit 150 through the transistor Q3 and the diode D1. That is, the switch SW1 and the switch SW2 of the switching unit 150 are supplied.

Since the operating voltage supplied to the diode D1 is cut off even when the switch SW0 is turned off, the monostable MV unit 110 operates because the operating voltage is supplied to the transistor Q3. In this state, when the switch SW1 or the switch SW2 is turned on, the relay unit 140 is operated and the voltage required for driving the motor is output to the motor terminal S1 or S2 to drive the door lock motor.

When the output OUT of the monostable MV unit 110 reaches the second level state LOW after a predetermined time, the transistor Q2 is turned off while the transistor Q3 is turned off.

Accordingly, when the output OUT of the monostable MV unit 110 is in the second level state LOW, the transistor Q2 of the blocking unit 120 used to block the leakage current is turned off. The transistor Q3 is also turned off so that no leakage current is generated. Therefore, the dark current does not flow.

Hereinafter, the operation of the monostable MV unit 110 will be described in more detail.

As described above, the monostable MV unit 110 includes a time delay generator 112, a reference voltage generator 114, and a schmitt trigger unit 116.

The time delay generator 112 receives an input signal applied by the switching of the switch SW0 of the switching unit 150 through the resistors R1 and R2 and controls the transistor Q1 and the transistor ( And a capacitor C2 that performs charging or discharging depending on whether Q1) is turned on or off. In addition, the resistor R3 may be provided in the operating voltage supply path of the time delay generator 112.

The reference voltage generator 114 distributes the operating voltage supplied through the transistor Q3 and the diode D1 through the resistor R4, the resistor R5, and the resistor R10 to divide the Schmitt tree. The reject 116 is supplied with a reference voltage.

The Schmitt trigger unit 116 includes at least two comparators U1A and U1B fed back to each other to compare the output of the time delay generator 112 with a reference voltage of the reference voltage generator 114. The output is generated to the blocking unit 120. The Schmitt trigger unit 116 has a hysteresis characteristic.

The operation of the monostable MV unit 110 will be described.

First, when the switch SW0 is turned on, the transistor Q1 is turned on by the voltage supplied through the resistor R1 and the resistor R2. Accordingly, the capacitor C2 is discharged so that the negative terminal (−) of the first comparator U1A of the Schmitt trigger unit 116 becomes 0V. At the same time, an operating voltage (power) is supplied to the reference voltage generator 114 and the Schmitt trigger unit 116 through a diode D1.

Since the reference voltage Vref appearing at the positive terminal + of the first comparator U1A of the Schmitt trigger unit 116 is greater than 0 V, the output of the first comparator U1A is in a high state. Becomes Accordingly, the transistors Q2 and Q3 of the blocking unit 120 are turned on to supply the operating voltage (power) to the reference voltage generator 114 and the Schmitt trigger unit 116 through the transistor Q3. do.

At this time, the output of the first comparator U1A is high and the transistor Q2 is turned on. Therefore, since the positive terminal + of the second comparator U1B is in the HIGH state and the negative terminal − is 0V, the output of the second comparator U1B is in the HIGH state.

Herein, when it is assumed that the output of the first comparator U1A is in a high state and the level is the same as the level of the operating voltage VCC, the reference voltage which is the output of the reference voltage generator 114 at this time is referred to as a first reference. If it is a voltage, the first reference voltage Vref, h becomes 'VCC * R5 / (RA + R5)'. RA represents the parallel resistance value (R4 // R10) of R4 and R10.

When the switch SW0 is turned off, the transistor Q1 of the time delay generator 112 is turned off. At this time, the capacitor C2 starts to be charged. The charging time is determined by the capacity of the resistor R3 and the capacitor C2.

After a predetermined time, if the charging voltage of the capacitor C2 exceeds the reference voltage Vref and the charging voltage appearing at the negative terminal (−) of the first comparator U1A is greater than the reference voltage Vref, 1 Comparator U1A goes low. Accordingly, as the transistor Q2 is turned off, the transistor Q3 is also turned off.

At this time, the output of the second comparator U1B is also in a low state. In this case, if the reference voltage of the reference voltage generator 114 is a second reference voltage, the second reference voltage Vref.l is 'VCC * RB / (R4 + RB)' and thus the first reference voltage. Will be lower. Where RB represents the parallel resistance of R5 and R10.

The reason why the level of the first reference voltage Vref.h and the second reference voltage Vref.l is different is that voltage is distributed depending on whether the output of the second comparator U1B is high or low. This is because the ratio of the resistance value of the reference voltage generator 114 is different.

As described above, the chattering is prevented from occurring at the output of the first comparator U1A by using the method in which the reference voltage Vref of the Schmitt trigger unit 116 is changed.

When the switch SW1 or the switch SW2 is turned on during the time taken for the capacitor C2 to start charging and reach the first reference voltage Vref, h, the relay unit 140 is driven to drive the motor driving voltage. This occurs to drive the door lock motor.

As described above, according to the present invention, it is possible to reduce the dark current and to prevent or minimize the occurrence of chattering.

Since the description of the above embodiment is merely an example with reference to the drawings for a more thorough understanding of the present invention, it should not be construed as limiting the present invention. In addition, it will be apparent to those skilled in the art that various changes and modifications can be made without departing from the basic principles of the present invention.

1 is a circuit diagram of a general vehicle door lock driving device,

2 is an implementation circuit diagram of a vehicle door lock driving apparatus according to an embodiment of the present invention.

* Description of the symbols for the main parts of the drawings

110: monostable MV part 120: cut off part

130: reverse voltage protection unit 140: relay unit

150: switching unit

Claims (6)

In a car door lock drive device that controls the opening and closing of a car door by controlling the forward or reverse rotation of the motor: A monostable MV unit for outputting a first level state signal for a predetermined time in response to an applied input signal, and for outputting a second level state signal different from the first level state signal outside the predetermined time; In order to cut off the leakage current of the monostable MV unit during the time that the second level status signal is output from the monostable MV unit, it is connected to the power terminal of the vehicle battery to control whether the supply voltage of the monostable MV unit is supplied. Wealth; At least one of supplying an operating voltage to the relay through a switch for controlling the application of the input signal and the operating voltage to the monostable MV unit and switching the operating voltage supplied to the monostable MV unit through the blocking unit. A switching unit having switches; And a relay unit which operates by supplying an operating voltage by the switching operation of the switching unit to rotate the motor forward or reverse. The method according to claim 1, The blocking unit may be configured to control at least one switching element controlled by the output signal of the monostable MV unit, and to operate the at least one switching element to determine whether to supply the operating voltage of the monostable MV unit. An automobile door lock driving apparatus comprising at least two switching elements including one switching element. The method according to claim 2, And said at least two switching elements are transistors. The vehicle door lock driving apparatus according to claim 2, At least one for preventing the operating voltage supplied through the blocking unit from affecting the clock input terminal of the monostable MV unit when the switch controlling the application of the input signal and the operating voltage to the monostable MV unit is turned off. An automobile door lock driving apparatus further comprising a diode. The monostable MV unit according to claim 1 or 4, A time delay generator comprising a transistor controlled by an input signal applied by switching of the switching unit, and a capacitor configured to perform charging or discharging according to whether the transistor is turned on or off; A reference voltage generator for supplying a reference voltage having a predetermined level by operating voltages supplied through the blocking unit and the switching unit through voltage distribution using a resistor; Comprising at least two comparators are fed back to each other by comparing the output of the time delay generation unit and the reference voltage of the reference voltage generator generates a corresponding output to the blocking unit, characterized in that it comprises a Schmitt trigger unit having a hysteresis characteristic Car door lock drive. The vehicle door lock driving apparatus according to claim 5, And a reverse voltage protection part provided with at least one diode to protect the cutoff part from a reverse voltage generated when the relay part is driven.

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