JPS602010Y2 - Rotation stop control device for electric operation motor - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a control device for controlling the rotation and stopping of an electric operating motor used in an air conditioner of an automobile or the like.

Recently, in automobiles, various control levers that were previously operated manually are now operated using drive motors, solenoids, etc.
There is a tendency to simplify operations.

For example, in the case of heaters (including air conditioners), each mode (DEF, HEAT, VENT, etc.) of the heater unit was conventionally controlled by operating each switching damper using a manual lever, as shown in Utility Model Application No. 150256/1983. However, attempts have been made to perform this mode control by using a motor, converting the rotational force of the motor into reciprocating motion via a deceleration mechanism, and operating operating levers connected to each damper.

Generally, in an automobile air conditioner, a plurality of air doors provided in each air passage from a blower are provided so as to be interlocked with a cam lever via a push-pull cable, and the plurality of air doors are opened by reciprocating the cam lever. The cam lever is configured to be switched open and closed in combination with the following modes (usually 4 modes), and when the reciprocating movement of this cam lever is performed by electric operation, the electric operation mechanism is disclosed in the previously filed Utility Model Application No. 54-70533 or Jitsukai 54-140
As described in No. 068, the cam lever is linked with an electric operating motor that can rotate in forward and reverse directions by rack and pinion coupling or gear coupling, and by rotating the electric operating motor in forward and reverse directions, the cam lever is reciprocated to switch the air door. It is possible to perform an operation.

However, since the above mechanism is a mechanism for reciprocating the cam lever by rotating the electric operation motor in forward and reverse directions, two control circuits for forward and reverse rotation are required for the electric operation motor. This has the disadvantage that the circuit configuration becomes complicated and the cost increases.

The present invention has been developed in view of the above, and its purpose is to automatically stop an operated member, which is an air door, at a predetermined stop position by rotating an electric operating motor in only one direction. Thus, it is an object of the present invention to provide a rotation stop control device for an electrically operated motor that requires only one control circuit, has a simple circuit configuration, and has excellent operability.

In order to achieve the above object, the solution of the present invention includes a rotating arm that is driven by a motor and rotates in only one direction, and one moving member that moves back and forth to operate a plurality of operated members. A ring-shaped conductive track is provided on the base that rotates together with the rotary arm while being linked by a connecting link, and a conductive track is formed in the circumferential direction of the conductive track in accordance with the operating position of the operated member. A plurality of contactable sliding contacts are arranged, an operating switch is connected to each of the sliding contacts, and a closing means for closing an energizing circuit of the motor is connected to the conductive track, and the above-mentioned A separation part is provided on the conductive track at a predetermined width, and the separation part is moved to a position corresponding to the sliding contact by rotation of the conductive track, thereby breaking the connection between the conductive track and the sliding contact. The structure is characterized by the following.

With the above configuration, in the present invention, when the operating switch corresponding to the operating position of the operated member is turned ON, the energizing circuit of the motor is activated by the sliding contact between the sliding contact connected to the operating switch and the conductive track. When closed, the motor rotates in one direction, and the rotation of the motor rotates the conductive track, and the movable member moves through the rotation of the rotation arm and the link movement of the connecting link to move the operated member. is operated toward the desired operating position.

When the operated member reaches the desired operation position, the separated part of the conductive track moves to a position corresponding to the sliding contact connected to the operation switch, and the sliding contact and the conductive track are connected to each other. contact is cut off, the energizing circuit of the motor is opened, the rotation of the motor is stopped, and the operated member is stopped and held at the desired operating position.

Therefore, the movable member reciprocates by rotation of the motor in only one direction, and the plurality of operated members are operated to predetermined operation positions.

Hereinafter, embodiments of the present invention will be described in detail based on the drawings.

1 and 2 show an example in which the rotation stop control device for an electrically operated motor according to the present invention is applied to an air conditioner for an automobile. In FIGS. 1 and 2, 1 is a heater unit; The heater unit 1 includes a defroster air outlet 3 that opens on the top surface of the instrument panel 2, a chest air outlet 4 that opens on the rear surface of the instrument panel 2, and a foot air outlet 5 that opens toward the occupant's feet. The heater unit 1 includes a vent door 6 that opens and closes the chest air outlet 4, a floor door 7 that selectively opens and closes the defroster air outlet 3 and the foot air outlet 5, and an air mix door 8 that controls the amount of ventilation to the heater core 9. provided,
Each door above? , 8. 9 switches the air passage of the heater unit 1, so that the air from the blower 10 is blown out from each outlet 3, 4, and 5 while controlling the temperature.

One end of a push-pull cable 11.12 is connected to the vent door 6 and the floor door 7, respectively, and the other end of the push-pull cable 11.12 is connected to a cam groove 1 formed in one cam lever 13 as a moving member.
4.15, and the cam lever 13 is connected to the pivot pin 16.
By reciprocating around the vent door 6 and the floor door 7, the vent door 6 and the floor door 7, which are operated members, are combined into four mode positions as shown in the table below and can be opened/closed.

Reference numeral 17 denotes a rotating arm connected to an electric operation motor 18 via a worm 19 and a worm gear 20, and the rotating arm 17 is driven by the motor 18 and is provided to rotate only in one direction. At the same time,
The rotating arm 17 and the cam lever 13 are linked together by a connecting link 21 such that the cam lever 13 moves back and forth once per rotation of the rotating arm 17.

Note that 22 is a gear case.

Furthermore, as shown in FIG.
3 is attached to the base member 23 and has an annular conductive track 24 concentrically attached thereto.

In the circumferential direction of the conductive track 24, the rotating arm 1
Conductive tracks 24 are provided at positions corresponding to the four mode positions of the vent door 6 and the floor door 7 at 7, respectively.
A plurality of sliding contacts 26 to 29 are arranged so as to be able to come into contact with the conductive track 24 at a spacing section 25, which will be described later. The fixed contacts 30a to 30d are connected, and the movable contact 30e of the operation switch 30 is connected to the battery 3.
Connected to 1.

Further, a permanent contact 32 that is always in sliding contact with the conductive track 24 is disposed near the conductive track 24, and the permanent contact 32 is connected to ground 36 via a relay coil 34 of a relay means 33. The relay switch 35 of the relay means 33 is connected to the energizing circuit 37 of the electric operation motor 18, the normally closed contact 35a of the relay switch 35 is connected to the ground 36, and the relay coil of the relay means 33 When the relay coil 34 is energized, the relay switch 35 closes to close the energizing circuit 37 of the motor 18, while when the relay coil 34 is de-energized, the relay switch 35 opens to open the energizing circuit 37 of the motor 18 and the motor 18 Closing means is configured to short-circuit both ends of the.

Furthermore, a spacing portion 25 is formed at a suitable location on the conductive track 24 and is spaced apart by a predetermined width by cutting out the outer circumferential portion of the conductive track 24 . The above sliding contacts 26 to 29
conductive track 24 when moved to a position corresponding to
The relay means 33 disconnects the sliding contacts 26 to 29.
The relay coil 34 is configured to stop being energized.

Next, to explain the operation of the above embodiment, for example, in a state where the sliding contact 26 is in a position facing the separation part 25 of the conductive track 24, as shown in FIG. When the fixed contact 30a corresponding to the contact 26 is switched to another fixed contact at a desired position, for example, the fixed contact 30b, since the permanent contact 32 is always in contact with the conductive track 24, the operating switch 30 Contact 3
Relay means 33 from the battery 31 via the sliding contact 27 corresponding to 0b, the conductive track 24 and the permanent contact 32
Current flows through the relay coil 34, and this relay coil 3
4 closes the relay switch 35 and motor 1
The energizing circuit 37 of No. 8 is closed, and the motor 18 rotates in one direction.

As the motor 18 rotates, the rotary arm 17 rotates, and the cam lever 13 connected to the rotary arm 17 by a connecting link 21 moves to switch between opening and closing the vent door 6 and the floor door 7. Rotating arm 17
The rotation of the conductive track 24 causes the conductive track 24 to rotate.

When the cam lever 13 reaches a predetermined mode position, the separating portion 25 faces the sliding contact 27 disposed at the position of the conductive track 24 corresponding to the mode position of the cam lever 13, and the conductive track 24 and sliding contact 2
7 are separated from each other, thereby stopping the power supply from the battery 31 to the relay coil 34 of the relay means 33, opening the relay switch 35, stopping the power supply to the motor 18, and stopping the motor 18. The rotating arm 17 stops and the cam lever 13 stops at its predetermined mode position.

Here, when the relay switch 35 of the relay means 33 is switched to the normally closed contact 35a side, since the normally closed contact 35a is connected to the ground 36, the motor 18 is short-circuited and the motor 18 is switched to the normally closed contact 35a side. A braking force is applied to the cam lever 18 to accurately position and stop the cam lever 13 at its predetermined mode position.

In addition, when switching the cam lever 13 from this mode position to another mode position, the operation switch 30
Similar to the above-mentioned operation, the switching operation is performed by rotating the motor 18 only in one direction.

In the above embodiment, the energizing circuit 37 to the motor 18 is switched on and off by energizing and de-energizing the relay coil 34 of the relay means 33, but it is also possible to conductively connect the motor directly to the track. , the voltage from the battery may be applied to the motor through the conductive track, and the same effect as in the above embodiment can be achieved, but in that case, a large current flows through the motor. Therefore, the allowable input current capacity of the operation switch and each sliding contact must be increased, which increases the cost, so the above embodiment is preferable.

Further, in the above embodiment, one set of sliding contacts 26 to 29 is arranged in the circumferential direction of the conductive track 24, but each sliding contact 26 to 29 is arranged in the circumferential direction of the conductive track 24.
Another set of sliding contacts is provided at each position of the conductive track 24 diametrically opposite to 29, so that the sliding contacts in the same mode position are connected to the fixed contacts of the same operating switch. In that case, the separated part of the conductive track and the sliding contact at the desired mode position face each other in a short time, so that 'j1. ! ! This has the advantage that the time required for switching the lever can be shortened.

Furthermore, it goes without saying that the present invention can be applied not only to the air conditioner of an automobile as in the above embodiment, but also to various other devices equipped with electric operating motors.

As described above, according to the present invention, a rotary arm that is driven by a motor and rotates in only one direction is linked with a movable member that moves back and forth to operate a plurality of operated members using a connecting link. On the other hand, an annular conductive track is provided on a base that rotates together with the rotary arm, and a plurality of conductive tracks are provided in the circumferential direction of the conductive track and are capable of contacting the conductive track in accordance with the operation position of the operated member. A sliding contact is disposed, an operating switch is connected to each sliding contact, and a closing means for closing/disconnecting the energizing circuit of the motor is connected to the conductive track, and a predetermined contact is connected to the conductive track. By providing one spaced part spaced apart by a width, the spaced part moves to a position corresponding to the sliding contact point by rotation of the conductive track, and breaks the connection between the conductive track and the sliding contact point. Since the operated member can be operated by rotating the motor in only one direction, only one motor control circuit is required, which simplifies the circuit configuration. Since the motor can be stopped automatically, the operated member can be operated simply by switching the operation switch, which simplifies the control circuit configuration of the electric operation motor and improves operability. It is something that can be achieved.

[Brief explanation of drawings]

The drawings illustrate an embodiment of the present invention, and FIG. 1 is a schematic explanatory diagram of an air conditioner for an automobile, and FIG. 2 is an electric circuit diagram showing a control circuit configuration of a motor. 1... Heater unit, 3... Defroster outlet, 4... Chest outlet, 5...
・Foot outlet, 6...Vent door, 7...
...Floor door, 8... Air mix door, 1
3...Cam lever, 17...Rotating arm, 18...Motor, 19...Worm, 20...Worm gear, 21...・・・・・・
Connecting link, 23...Base member, 24...
... Conductive track, 25 ... Separation part, 26
~29... Sliding contact, 30... Operation switch, 32... Regular contact, 33...
Relay means, 37... energizing circuit.

Claims (1)

[Scope of utility model registration request] A rotary arm that is driven by a motor and rotates in only one direction and a movable member that moves back and forth to operate a plurality of operated members are linked together by a connecting link, and rotates integrally with the rotary arm. An annular conductive track is provided on the base, and a plurality of sliding contacts that can freely come into contact with the conductive track are arranged in the circumferential direction of the conductive track in correspondence with the operating position of the operated member, and each sliding contact An operation switch is connected to each of the contacts, and a closing means for closing an energizing circuit of the motor is connected to the conductive track, and a separation part is provided at a predetermined width on the conductive track, and the separation part is separated by a predetermined width. A rotation stop control device for an electrically operated motor, characterized in that a portion moves to a position corresponding to the sliding contact by rotation of the conductive track, and disconnects the conductive track and the sliding contact.