JPS6347924Y2 - - Google Patents

Description

[Detailed explanation of the idea]

The present invention relates to a control device for an electric operation motor, in particular,
The present invention relates to a control device for an electrically operated motor, which has a display function that displays the stroke position of a driven body driven by the electrically operated motor, and also displays whether electrically operated or abnormally occurring. Utility Application No. 54-140331 describes a control device that electrically performs mode conversion operations for various devices that were conventionally performed manually, such as mode switching of an automobile heater or air conditioner, or opening and closing of window glass. A control device for an electric operation motor was proposed. This control device drives a movable member using an electrically operated motor capable of forward and reverse rotation, thereby operating a driven member connected to the movable member, such as a vent door or a floor door in a heater unit. The motor is rotated in forward and reverse directions by operating a plurality of operation switches for specifying the stroke position of the driving member, and the movable member is stopped at its stop position. The stroke position is displayed by an indicator lamp corresponding to the stop position. However, in this control device, a self-holding circuit is provided which is independently set by each of the above-mentioned operation switches for each of the number of indicator lamps corresponding to the stop position of the moving member, and the corresponding indicator lamp is turned on by operating the operation switch. The selected mode, ie, the stroke position of the driven body, is displayed in advance. With this method, the stroke position of the driven member is detected and each indicator lamp is turned on in sequence, which eliminates the troublesome display caused by the indicator lamps blinking sequentially during the stroke period. Even when the driven body does not stroke to a predetermined stroke position, there is a problem in that the completion of the stroke is erroneously displayed, and there is also a problem in that the configuration is complicated and costs are high. The present invention has been developed to solve such problems, and it has a simple structure that guarantees reliable operation, and also controls the stroke position of the driven member, the stop position of the electric operation motor, and the timing of operation or abnormality. An object of the present invention is to provide a control device for an electric operation motor that lights up and displays. The control device for an electric operation motor according to the present invention includes:
a starting control circuit that issues a control signal to start the electric operating motor according to a switch signal from each of the operating switches so that the driven member strokes specified by a plurality of operating switches, and the driven member. a stop control circuit that stops the electric operation motor when the motor reaches a target stroke position; and a stop control circuit that stops the electric operation motor when the motor reaches a target stroke position, and is individually controlled to light up according to a switch signal from each of the operation switches to display each stroke position of the driven member. each control circuit such that a plurality of display elements and at least one display element among the plurality of display elements other than the display element displaying the target stroke position are turned on by the start control circuit and turned off by the stop control circuit; The device is characterized by comprising an indicator light control circuit connected to the. Hereinafter, the present invention will be described with reference to the accompanying drawings, which illustrate one embodiment of the present invention. For convenience, an example in which the present invention is applied to an automobile heater unit will be described, but it goes without saying that the present invention is not limited to this embodiment. As shown in FIG. 1, the heater unit 50 has a defroster air outlet 1 that opens at the top of the instrument panel 2, a chest air outlet 3 that opens toward the occupant's chest, and an air outlet that opens toward the occupant's feet. A vent door 6 has a flow path communicating with the foot air outlet 4 and opens and closes the flow path to the chest air outlet 3, and a floor door 5 opens and closes the flow path to the defroster air outlet 1 and the foot air outlet 4. In addition, an air mix door 8 for controlling air blowing to the heater core 7 is installed inside the unit, and a blower 10 for introducing outside air or inside air into the unit from an air inlet 9 is attached. The floor door 5 and vent door 6 as driven members are connected to the cam grooves 11a and 11b of the mode switching lever 11 by cables 12 and 13, respectively, and are switched to the set stop position of the mode switching lever 11 by switching the mode switching lever 11 to the set stop position. It is opened and closed. The switching lever 11 is driven by the control device according to the present invention, and swings around the support shaft 14. The control device of the present invention mechanically includes an electric operation motor 15 and a drive member 16 driven by the motor 15 via a drive gear system pinion 17, and this drive member 16 has one end connected to a rod 19.
is connected to the mode switching lever 11 by
The reciprocating movement of the drive member 16 causes the mode switching lever 11
is converted into a rocking motion. In this embodiment, the drive member 16 is constituted by a rack 18 having linear teeth that mesh with the pinion 17, but this may be constituted by a spur gear instead of the rack. In this case, it is preferable that the mode switching lever 11 be provided with teeth that mesh with a gear. The control device is electrically configured as follows. That is, a motor that can freely rotate in both forward and reverse directions is used as the electric operation motor 15, and one end of its connection terminal is connected to the motor protection circuit breaker 51.
The other end is connected to a movable contact among the contacts 37a of the first relay 37 which constitutes a motor forward rotation starting circuit, and the second relay 38 whose other end constitutes a motor reverse rotation starting circuit is connected to a movable contact among the contacts 38a. It is connected. Both relays 37 and 38 each have one of their normally open contacts connected to the other end of a power source 34 whose one end is grounded, and whose normally closed contacts are grounded, and when demagnetized, both of the connection terminals of the motor are grounded. Excitation coil 37b of first relay 37 and second relay 3
The excitation coils 38b of No. 8 both have one end connected to the power source 34.
The other ends are connected to permanent contacts 27 and 28 that always slide on a conductive part 24 for a motor forward rotation starting circuit and a conductive part 25 for a motor reverse rotation starting circuit, respectively, which are provided on one side of the drive member 16. has been done. Both conductive parts 24 and 25 are insulated from each other by a non-conductive part 26 interposed between them. A number of sliding contacts 2 corresponding to the number of modes are provided at intervals corresponding to the swing angle between the stop positions of the mode switching lever 11 along the movement direction of the drive member 16.
0, 21, 22, and 23 are arranged, and these are in sliding contact with either the conductive parts 24, 25 or the non-conductive part 26. Sliding contacts 20, 21, 22, 2
Reference numeral 3 denotes a position designating operation switch 2 for designating the stop position of the mode switching lever 11, that is, the stop position of the vent door 6 and the floor door 5, which are driven members corresponding to the operating mode of the heater core unit 50.
9, 30, 31 normally open contacts 29a, 30a, 31
a, and the sliding contact 23 is connected to the operating switch 2.
9, 30, 31 normally closed contacts 29 connected in series
c, 30c, and 31c. A control circuit that starts and stops the motor 15 according to switch signals from the operating switches 29, 30, and 31 using a motor forward rotation starting circuit including the first relay 37 and a motor reverse rotation starting circuit including the second relay 38. is configured. In addition to the general configuration described above, the control device of the present invention includes a circuit that displays the stop position of the mode switching lever 11, that is, the stroke position of the driven member. This motor stop position display circuit includes a number of lamps, light emitting diodes, and other display elements L ₁ , L ₂ , and a number corresponding to the number of stop positions of the mode switching lever 11.
Consisting of L ₃ and L ₄ , one end of each display element is connected to the power supply 34.
connected to the other end, each other end is a diode
It is connected to the other end of the excitation coil 37b of the first relay 37 of the motor forward rotation starting circuit via D ₁ , D ₂ , D ₃ , D ₄ , and diodes D ₅ , D ₆ , D ₇ , D ₈ It is connected to the other end of the excitation coil 38b of the second relay 38 of the motor reverse start circuit through the circuit contacts 29c, 30c, and 30c of the position specifying operation switch.
It is connected to other circuit contacts 33, 34, 35 of the position designating operation switch linked to 31c and to a contact 36 of the position designation operation switch 32. The position specifying operation switch 32 itself does not have a contact point, but operates in conjunction with another operation switch to make a contact point 36.
The position specifying operation switches 29, 30, 31, and 32 are provided so that when one switch is operated, all the remaining switches are turned off and closed to the ground side. In the case of the above-mentioned position specifying operation switch 32, when the switch 32 is operated, the other switches 29, 30, 31 are closed to the ground side, and the contact 3 is closed.
6 closes and turns on, and when one of the other switches is operated, switch 32 opens contact 36 and turns off.
It works like that. In the control device having the above configuration, the stop position of the mode switching lever 11 is made to correspond to the position specifying operation switches 32, 31, 30, 29 and the display elements L ₁ , L ₂ , L ₃ , L ₄ . ,
When the operation mode of the heater unit and the positions of the vent door 6 and floor door 5 are matched as shown in the table below, the operation is as follows.

[Table] In the illustrated differential mode, the air introduced by the blower 10 is blown out into the vehicle from the defroster outlet 1, the contact 36 is closed, and the display element _L4 is lit. Now, in order to switch from the differential mode to the heat mode, when the position specifying operation switch 31 is operated, the normally open contact 31a closes and the excitation coil 37b of the first relay 37, the normal contact 27, the conductive part 24, and the sliding contact 22 are closed. A current flows through the motor forward rotation starting circuit including the first relay 37, and power is supplied to the motor 15 to cause the motor 15 to rotate forward and move the drive member 16 to the left in the figure. At this time, the contact 35 of the display element L ₃ is closed, so power is supplied and the display element L 3 lights up, but at the same time, the other display elements
Since current also flows through L ₁ , L ₂ , and L ₄ through the diodes D ₁ , D ₂ , and D ₄ , the permanent contact 27 , the conductive part 24 , and the sliding contact, the light is turned on. All display elements L ₁ , L ₂ , L ₃ , and L ₄ are turned on at once by a control signal issued from the control circuit. Note that the position specifying operation switch 32 operates simultaneously with the closing of the position specifying operation switch 31 to open the contact 36. When the mode switching lever 11 is switched from the stop position shown in the figure due to leftward movement of the drive member 16, the drive member 16 is also displaced correspondingly, so the sliding contact 22 is separated from the conductive part 24 and is not moved. Since it comes into sliding contact with the conductive part 26, the motor normal rotation starting circuit is opened, the excitation coil 37b of the first relay 37 is demagnetized, its movable contact is grounded, and the connection terminal of the motor is grounded, so that a braking force is applied. Stop. When the sliding contact 22 comes into sliding contact with the non-conductive part 26, the above control signal disappears, and the display element L ₁ ,
L ₂ and L ₄ go out, and only the display element L ₃ continues to light up according to the switch signal from the operation switch 31.
This will indicate that the operating mode of the heater unit is heat mode. In addition, when in heat mode, defroster outlet 1 and foot outlet 4
Air is blown into the car from In addition, when switching from this heat mode to the differential mode, when the operation switch 32 for position specification is pressed, the normally closed contacts 29c, 30c, 31c of the other operation switches 29, 30, 31 all close to the ground side, and the sliding contact Since the contact 23 is in sliding contact with the conductive part 25 for the motor reverse start circuit together with the permanent contact 28, a current flows through the excitation coil 38b of the second relay 38 to excite it, and the movable contact is connected to the power supply 34 to start the motor. begins to reverse, causing the drive member 16 to move to the right in the figure, contrary to the previous case. At this time,
The display elements L ₁ , L ₂ , and L ₃ other than the display element L ₄ are turned on by the current flowing from the diodes D ₅ , D ₆ , and D ₇ through the permanent contact 28 and the sliding contact 23, that is, the motor 15 All display elements L ₁ ,
L ₂ , L ₃ , and L ₄ are lit all at once, and the drive member 16
reaches a predetermined stop position and the sliding contact 23 comes into sliding contact with the non-conductive part 26 as shown, the current is cut off and the light goes out, but only the display element _L4 has a contact 36 that is opened and closed by the operation switch 32. Since the circuit is closed, the light will continue to light according to the switch signal. Further, when the sliding contact 23 comes into sliding contact with the non-conductive part 26, the motor reverse rotation starting circuit is opened and the motor 15 is stopped. On the other hand, when switching from the heat mode to the differential mode, if a failure occurs for some reason, such as an abnormal situation in which the motor locks and the drive member 16 does not reach a predetermined position, the above-mentioned operation will not be performed and the control circuit will continue to issue a control signal. In other words, the second
Current continues to flow through the excitation coil 38b of the relay 38. Therefore, display elements L ₁ , L ₂ , L ₃ do not turn off, and all display elements L ₁ , L ₂ , L ₃ , L ₄ remain lit for a long time, so that the occurrence of the above abnormal situation is prevented. This allows it to be displayed. Note that the motor 15 is connected to a circuit breaker 51.
Since the current is cut off, there is no risk of burnout. The operation when switching from the differential mode to a mode other than the heat mode or when switching from this mode to another mode is the same as described above, and therefore a description thereof will be omitted. As is clear from the above explanation, the control device for the electric operation motor according to the present invention has a simpler structure and fewer parts than conventional ones, so the operation is reliable, and the control device can control the stop position of the driven member. The stop position of the motor can be displayed by lighting. Also,
When the motor is operating, at least one display element other than the display element indicating the target stroke position will light up, allowing you to confirm its operation, and if there is any mechanical abnormality even after switching the position designation switch. At least one display element other than the display element indicating the target stroke position also continues to light up according to control signals for starting and stopping the electric operating motor, thereby making it possible to recognize the abnormality.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of a control device for an electric operating motor according to the present invention, which is adapted to operate a heater unit of an automobile. 5...floor door, 6...vent door, 11...
...Mode switching lever, 50...Heater unit,
15...Motor, 16...Driving member, 20,2
1, 22, 23... Sliding contact, 24, 25... Conductive part, 26... Non-conductive part, 27, 28... Regular contact, 29, 30, 31, 32... Position designation operation switch, L ₁ , L ₂ , L ₃ , L ₄ ...Display element, D ₁ -
_D8 ...Diode.

Claims (1)

[Scope of utility model registration request] an electric operating motor that drives a driven member; and activating the electric operating motor in accordance with a switch signal from each operating switch so as to stroke the driven member to each stroke position corresponding to a plurality of operating switches. A start control circuit that issues a control signal, a stop control circuit that stops the electric operation motor when the driven member reaches a target stroke position, and individual lighting control circuits that control the operation according to switch signals from each of the operation switches. is,
A plurality of display elements displaying each stroke position of the driven member and at least one display element other than the display element displaying the target stroke position among the plurality of display elements are turned on by the start control circuit, and the drive member is stopped. 1. A control device for an electrically operated motor, comprising an indicator light control circuit connected to each control circuit so that the light is turned off by the control circuit.