JPH0140923Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION This invention relates to a door lock operating device, and more particularly to a motor control device for an electric door lock that can place the output end member of a door lock actuator in a neutral position.

In recent years, in order to improve the safety and convenience of vehicles,
Centralized door lock systems are increasingly being adopted.

In this case, there is no problem if the door lock actuator is attached directly to the door lock mechanism attached to the door to turn the door lock on and off, but in the case of a sliding side door, for example, When the door lock mechanism is installed on the vehicle body and the output end member of the door lock actuator is used to turn the door lock on and off, the output end member of the door lock actuator is not set to the neutral position. However, when the door is opened or closed, the output end member may operate and damage the door lock actuator.

This invention was made in view of the above-mentioned problems, and an object of the present invention is to provide an electric door lock motor control device that can place the output end member of a door lock actuator in a neutral position.

The electric door lock motor control device of this invention consists of first and second transistors whose bases are supplied with current and become conductive by switching the contacts of a timer that supplies power for a predetermined period of time when the door lock is turned on and off, and which are connected to the vehicle body side. a DC motor with a speed reduction mechanism that rotates forward or reverse to perform a door lock operation by switching contacts of first and second relays that are attached and connected between the collectors of the first and second transistors and a power source, respectively; an auto-stop mechanism that is attached to the deceleration shaft of the DC motor and connects its common contact to either the first or second fixed contact when the DC motor rotates forward or reverse; connected to the positive terminal of the power supply and said first
and a second fixed contact to the first fixed contact via a resistor, respectively.
and the base of the second transistor, and the collectors of the first and second transistors are connected to the bases of the second and first transistors via diodes, respectively. The present invention is characterized in that the base is connected to a common door switch via a diode, and the deceleration shaft of the DC motor is stopped at a predetermined neutral return position after being rotated forward or reverse.

Hereinafter, embodiments of this invention will be described based on the drawings.

The attached drawing is a circuit diagram of a motor control device for an electric door lock according to an embodiment of this invention, in which 1 is a door lock on switch, 2 is a door lock off switch, T ₁ and T ₂ are timers, and 3 and 4 are respectively A timer relay that is energized for a predetermined time by timers _T1 and _T2 , 3a and 4a are contacts of timer relays 3 and 4, _M1 and _M2 are a front door lock actuator and a back door lock actuator, respectively; Tr ₁ and Tr ₂ are first and second transistors whose bases are connected to the timer relay contacts 3a and 4a through resistors R ₁ , R ₂ and R ₃ , R ₄ respectively, and 5 and 6 are the first transistors. and first and second relays connected between the collectors of the second transistors Tr ₁ and Tr ₂ and the positive pole of the power supply; D ₁ and D ₂ are connected between the base of the first transistor Tr ₁ and the collector of the second transistor Tr ₂ ; Diodes 7 connected between the base of the second transistor Tr ₂ and the collector of the first transistor Tr ₁ respectively ground the bases of the first and second transistors Tr ₁ and Tr ₂ via diodes D ₃ and D ₄ respectively. C ₁ and C ₂ are capacitors connected between the emitter and collector of the first transistor Tr ₁ and between the emitter and collector of the second transistor Tr ₂ , and R ₅ and R ₆ are capacitors connected between the emitter and collector of the first transistor Tr ₁ . These resistors are connected between the base and the emitter and between the base and the emitter of the second transistor _Tr2 .

Further, _M3 is a DC motor with a reduction mechanism that drives a door lock actuator 10 for operating a door lock mechanism attached to a sliding side door, and a reduction shaft M of this DC motor _M3 with a reduction mechanism is used. ₃₀ is connected to the door lock mechanism by an output end member (not shown). Reference numeral 11 denotes an auto-stop mechanism provided on the deceleration shaft M ₃₀ of the DC motor M ₃ , in which a common contact 13 that constantly contacts the conductive plate 12 of the auto-stop mechanism 11 is connected to the positive side of the power supply, and a first fixed contact 14 are connected to the base and emitter of the first transistor Tr ₁ via resistors R ₇ , R ₂ and R ₈ respectively, and the second fixed contact 15 is connected to the base and emitter of the second transistor Tr ₂ via resistors R ₉ and R ₄ respectively. and connected via _R10 . Furthermore, the movable contacts 5b and 6b provided in the relay contacts 5a and 6a of the first and second relays 5 and 6 are connected to the DC motor _M3 , and the fixed contacts 5c and 6c are connected to the positive and negative electrodes of the power supply, respectively. are doing. Furthermore, the emitters of the first and second transistors Tr ₁ and Tr ₂ are connected to the negative electrode of the power supply.

Next, to explain the operation, first, when door lock on switch 1 is turned on, timer _T1 operates for a predetermined time, contact 3a of timer relay 3 is connected to the positive side of the power supply for a predetermined time, and front door lock actuator M is activated. At the same time, the _first transistor _Tr1 becomes conductive, the first relay 5 is energized, and its relay contact 5a is connected to the positive side of the power supply, and the DC motor _{M3 is} activated. The deceleration shaft _M30 rotates in the direction of arrow A, drives the door lock actuator 10 through the deceleration mechanism, and turns on the door lock mechanism attached to the side door through the output end member. When the deceleration shaft M ₃₀ of the DC motor M ₃ rotates in the direction of arrow A, the common contact 13 and the second fixed contact 1
5 are connected to each other via a conductive plate 12, but while the timer _T1 is operating, the base of the second transistor _Tr2 is connected to the resistor _R4 , the diode _D2, and the collector and emitter of the conducting first transistor _Tr1 . Since the second transistor Tr 2 is connected to ground through the transistor Tr 2 , the second transistor Tr ₂ does not conduct. However, when the timer T ₁ expires, the timer relay 3 is turned off and the first transistor Tr ₁
turns off, its collector potential rises, the diode D ₂ becomes non-conductive, and the second transistor Tr ₂
A positive potential is applied to the base of the second transistor.
Tr ₂ is made conductive, the second relay 6 is energized, its relay contact 6a is connected to the positive side of the power supply, and the DC motor M ₃ is braked to a stop. On the other hand, at the same time that the front door lock actuator _M1 and the back door lock actuator _M2 are deactivated,
The first relay 5 is demagnetized and its contact 5a is connected to the negative pole of the power supply. Therefore, the deceleration shaft _M30 of the DC motor _M3 is reversed in the direction opposite to the direction of arrow A,
When the conductive plate 12 separates from the second fixed contact 15, the second transistor _Tr2 becomes non-conductive, the second relay 6 is demagnetized, its contact 6a is connected to the negative electrode of the power supply, and the DC motor _M3 is braked to a stop. Therefore, the deceleration shaft _M30 of the DC motor _M3 is stopped at a predetermined neutral position, and the output end member of the door lock actuator 10 connected to this deceleration shaft _M30 is stopped at the return position. , will not be damaged by opening or closing the side door.

In addition, when the door lock is released, when the door lock off switch 2 is turned on, the same operation as described above (the first and second transistors Tr ₁ , Tr ₂ ,
The operations of the first and second relays 5, 6, etc. are reversed, and the direction of rotation of the deceleration shaft _M30 of the DC motor _M3 is also reversed), thereby releasing the door lock.

Note that since the door switch 7 is turned on when the door is opened, the first and second transistors Tr ₁ ,
Tr ₂ is always in a non-conductive state, and the device will not operate even if either door lock on switch 1 or door lock off switch 2 is operated.

As explained above, according to this idea,
The door lock actuator is damaged when the door is opened and closed because the deceleration shaft of the door lock actuator attached to the vehicle body rotates forward or reverse after the door locks on and off and returns to the neutral position. In addition, the door lock actuator attached to the vehicle body can be used to operate the door lock mechanism attached to the sliding door using the timer for the front door lock actuator and the back door lock actuator. This has a great practical effect in that it can operate the yuator and eliminate the problem of damage to the door lock actuator due to opening and closing of the door.

[Brief explanation of the drawing]

The accompanying drawing is a circuit diagram of a door lock motor control device according to an embodiment of the present invention. 1...Door lock on switch, 2...Door lock off switch, 5...First relay, 6...Second relay, 5a, 6a...Relay contact, 7...Door switch, 10...Door lock actuator eta, 11... auto-stop mechanism, 12... conductive plate, 13... common contact, 14... first fixed contact,
15...Second fixed contact, _Tr1 ...First transistor, _Tr2 ...Second transistor, _M3 ...DC motor with reduction mechanism, _M30 ...Deceleration shaft, _T1 , _T2 ...
timer.

Claims (1)

[Scope of utility model registration request] The first and second parts are connected by supplying current to the base by switching the contacts of a timer that supplies power for a predetermined period of time when the door lock is turned on and off, respectively.
A speed reduction mechanism that performs door lock operation by rotating forward or reverse by switching the contacts of a transistor and first and second relays attached to the vehicle body side and connected between the collectors of the first and second transistors and a power source, respectively. a DC motor, and a common contact point of the DC motor that is attached to the deceleration shaft of the DC motor, and when the DC motor rotates forward or reverse, the common contact point is connected to the first
or an auto-stop mechanism connected to either of the second fixed contacts, a common contact of the auto-stop mechanism is connected to the positive electrode of the power supply, and the first and second fixed contacts are connected to the first and second fixed contacts through resistors, respectively. the collectors of the first and second transistors and the bases of the second and first transistors are connected via diodes, and the bases of the first and second transistors are connected to the bases of the first and second transistors through diodes. A motor control device for an electric door lock, characterized in that the DC motor is connected to a common door switch via a common door switch, and is configured to stop the deceleration shaft of the DC motor at a predetermined neutral return position after rotating forward or reverse.