JPH079650U - Control device for electric door mirrors for automobiles - Google Patents

Abstract

(57) [Abstract] [Purpose] Even though the storage position detection switch and the return position detection switch have simple contact structures, the number of lead wires required for the wiring harness for the door mirror may be two. To do. [Structure] Between the first terminal 9 and the second terminal 10 provided on the door mirror 4, the storage position detection switch 7, the motor 6, and the door mirror 4 which are turned off when the door mirror 4 is in the storage position are in the storage position. The return position detection switch 8 which is turned off at a certain time is connected, and the first and second diodes 11 and 12 are connected in parallel with the switches 7 and 8, respectively. The terminals 9 and 10 are connected to the control unit 15 on the vehicle body side.
They are connected by a wiring harness 14 composed of book lead wires 14a and 14b. When the operation command switch 16 is turned on, the control unit 15 connects the forward and reverse energization paths of the motor 6 to the relay switches 17a and 18a and the transistor 23.
The control for selectively forming is performed through such as.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a vehicle electric door mirror control device for remotely reciprocating an automobile door mirror between a retracted position and a retracted position.

[0002]

[Prior art]

 In recent years, a door mirror is reciprocally rotated between a storage position in a state substantially parallel to a door and a return position, which is a use position in a normal state, according to forward and reverse rotations of a motor provided in the door mirror. Such devices are widely used. In such a device, a storage position detection switch and a return position detection switch for detecting that the door mirror is in the retracted position and the retracted position are provided on the side of the door mirror. On the side, in addition to the operation command switch for remote operation, a drive circuit provided with a plurality of switching elements that are turned on by the operation of the operation command switch to selectively form the forward and reverse current paths of the motor. Etc. are provided.

When performing such forward / reverse rotation control of the motor, the storage position detection switch and the return position detection switch have a simple configuration (generally, the storage position detection switch has a door mirror at the storage position). When the door mirror is turned off and the return position detection switch is turned off when the door mirror is in the return position), the lead necessary for the wiring harness connecting the door mirror side and the car body side is used. The number of lines is four. However, it is cost effective that the number of leads of the wiring harness is as small as possible. For this reason, conventionally, by devising the contact structure of the retracted position detection switch and the retracted position detection switch, it is possible to control the forward / reverse rotation of the motor only by using a wiring harness consisting of two lead wires. A device that has been considered is considered.

[0004]

However, in the above-mentioned conventional configuration, since the storage position detection switch and the return position detection switch having a complicated contact structure are required, the number of lead wires required for the wiring harness is required. However, there is a problem in that it is impossible to expect a sufficient cost reduction in spite of the reduction of the power consumption, and the reliability against failure is lowered.

The present invention has been made in view of the above circumstances, and an object thereof is to use a storage position detection switch and a return position detection switch having a simple contact structure, while using the door mirror side and the automobile. The number of lead wires required for the wiring harness that connects the body side is now only two, so that a sufficient cost reduction effect can be realized and the reliability against failures can be improved. It is to provide a control device for an electric door mirror.

[0006]

[Means for Solving the Problems]

 In order to achieve the above object, the present invention comprises a motor housed in a door mirror, and when the motor is energized in the forward direction, the door mirror is rotated toward the storage position and is energized in the reverse direction. In a control device for an electric door mirror for an automobile, which is configured to rotate the door mirror in a direction opposite to the above,

On the door mirror side, a storage position detection switch configured to be turned off when the door mirror is in the storage position and connected between the first terminal and one end side of the motor, and the door mirror. And a return position detection switch connected between the second terminal and the other end of the motor so as to be turned off in a state where the switch is in the return position, and connected in parallel with the return position detection switch. A first diode for forming a positive direction energization path of the motor via the storage position detection switch and a reverse direction energization path of the motor connected in parallel with the storage position detection switch to connect the return position detection switch. A second diode for forming via a switch,

On the vehicle body side, when switched to the first state, the first terminal is connected to the power supply terminal and the second terminal is connected to the signal line, and the state is switched to the second state. A switching circuit for connecting the second terminal to the power supply terminal and the first terminal for connecting to the signal line, and an automatic reset operation command switch for outputting an operation command pulse in response to an external operation, A pulse generation circuit that generates a pulse signal for a fixed time when the operation command pulse is output, a first response circuit that switches the switching circuit to a first state only during the generation period of the pulse signal, and the operation command pulse A delay circuit that delays the pulse signal for a time longer than the generation time of the pulse signal, and a switching circuit that operates by the operation command pulse delayed by the delay circuit When the signal voltage appears at the second terminal while the switching circuit is switched to the first state, and the switching circuit is switched to the second state. A timer circuit that performs a timer operation for a predetermined time when the signal voltage appears at the first terminal in a switched state, and a timer circuit that is turned on only during the timer operation time of the timer circuit. According to the switch element, the function of the switch element that forms a current path to the door mirror side via the switching circuit and the function of the second response circuit when the switching circuit is in the first state are disabled. At the same time, a nullifying circuit for nullifying the function of the first response circuit when the switching circuit is in the second state is provided.

[0009]

[Action]

 The storage position detection switch is on when the door mirror is not in the storage position. When the operation command switch is operated in this state, the operation command pulse is output in response to this operation, and the pulse signal is output from the pulse generation circuit for a fixed time. During the generation period of this pulse signal, the first response circuit switches the switching circuit to the first state, so that the switching circuit connects the first terminal to the power supply terminal and the second terminal to the signal terminal. Connect to the line.

In this case, since the storage position detection switch is turned on as described above, the power supply voltage applied to the first terminal is the storage position detection switch, the motor, the first diode and the second diode. It will appear as a signal voltage on the signal line via the terminal. Therefore, the timer circuit starts the timer operation for a predetermined time, and the switch element is turned on only during the timer operation time so that the energization path to the door mirror side via the switching circuit is formed. Become.

As a result, the motor forward direction energization path is formed via the switching circuit, the storage position detection switch, the first diode and the switch element, and the door mirror is rotated in the storage position direction. become. When the door mirror is rotated to the stowed position, the stowed position detection switch is turned off to cut off the motor's forward-direction electrical circuit, thereby stopping the door mirror at the stowed position. . As described above, when the switching circuit is in the first state, the invalidating circuit invalidates the function of the second response circuit, so that the switching circuit is in the second state by the second response circuit. It is never switched to.

When the door mirror is in the storage position, the storage position detection switch is off and the return position detection switch is on. When the operation command switch is operated in this state, the pulse signal is output from the pulse generation circuit for a fixed time by the operation command pulse as described above, and the first response is generated during the generation period of the pulse signal. The circuit switches the switching circuit to the first state, and the switching circuit connects the first terminal to the power supply terminal and the second terminal to the signal line.

However, in this case, since the storage position detection switch is turned off as described above, the power supply voltage applied to the first terminal does not appear as a signal voltage on the signal line. Therefore, when the pulse signal subsequently disappears, the second response circuit is operated by the operation command pulse delayed for a time longer than the generation time of the pulse signal in the delay circuit, and the response circuit is activated. The switching circuit is switched to the second state, and accordingly, the switching circuit connects the second terminal to the power supply terminal and the first terminal to the signal line.

In this case, since the return position detection switch is turned on as described above, the power supply voltage applied to the second terminal is the return position detection switch, the motor, the second diode, and the first It will appear as a signal voltage on the signal line via the terminal. Therefore, the timer circuit starts the timer operation for a predetermined time, and the switch element is turned on only during the timer operation time so that the energization path to the door mirror side via the switching circuit is formed. become.

As a result, a reverse current path of the motor is formed through the switching circuit, the return position detection switch, the second diode and the switch element, and the door mirror is rotated in the return position direction. become. Then, when the door mirror is rotated to the return position, the return position detection switch is turned off to cut off the reverse current path of the motor, thereby stopping the door mirror at the return position. . As described above, when the switching circuit is in the second state, the invalidating circuit invalidates the function of the first response circuit, so that the switching circuit is in the first state by the first response circuit. It is never switched to.

In this case, since the above control is performed through the first terminal and the second terminal provided on the door mirror side, the wiring harness for electrically connecting the door mirror to the vehicle body side is not provided. , It is only necessary to provide two lead wires connected to the first terminal and the second terminal.

[0017]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings. Referring to FIG. 3 showing a schematic plan view of a vehicle, door mirrors 4 and 5 are provided at front end portions of a driver side door 2 and a passenger side door 3 of the vehicle 1, respectively. , It is possible to move back and forth between the return position (see the solid line) which is substantially orthogonal to the doors 2 and 3 and the storage position (see the chain double-dashed line) which is substantially parallel to the doors 2 and 3. ing. Actually, each of the door mirrors 4 and 5 is configured to be rotatable to a position further forward than the return position.

FIG. 1 shows an electrical configuration, which will be described below. Although only one door mirror 4 is illustrated in FIG. 1, the other door mirror 5 also has the same electrical configuration as the door mirror 4, and the terminal T1 in FIG. Since the same connection is made to T2, the description of the door mirror 5 is omitted.

That is, in FIG. 1, a motor 6 is housed in the door mirror 4, and the door mirror 4 is reciprocally rotated in response to energization in the forward and reverse directions. Specifically, when the motor 6 is energized in the forward direction (arrow A direction in the drawing), the motor 6 rotates forward to rotate the door mirror 4 toward the storage position, and is energized in the reverse direction (counter arrow A direction). When it is turned on, the door mirror 4 is rotated in the reverse direction to rotate in the opposite direction to the above.

The storage position detection switch 7 is provided in the door mirror 4, and as shown in FIG. 2, the storage position detection switch 7 is in an off state which is a detection state only when the door mirror 4 is in the storage position, and is stored in a position other than the storage position. At certain times (in the intermediate position between the retracted position and the return position, in the return position, and in the front position), it is in the ON state. Further, the return position detection switch 8 is also provided in the door mirror 4, and as shown in FIG. 2, when the door mirror 4 is in the return position and the front position, it is in an off state which is a detection state, and it is in the storage position. And in the intermediate position, it is turned on. In this case, the storage position detection switch 7 is connected between the first terminal 9 and one end of the motor 6, and the return position detection switch 8 is connected between the second terminal 10 and the other end of the motor 6. Is connected in between.

A first diode 11 having the illustrated polarity is connected in parallel to the return position detection switch 8 so that the forward direction energization path of the motor 6 (the energization path in the direction of arrow A) is stored. And is formed through the first diode 11. The storage position detection switch 7 is connected in parallel with the second diodes 12 having the illustrated polarities, so that the reverse direction energization path of the motor 6 (the energization path in the direction opposite to the arrow A) is restored to the return position detection switch 8 and It is formed through the second diode 12. A resistor 13 is connected in parallel with the motor 6.

The terminals 9 and 10 of the door mirror 4 are connected to the terminals T1 and T2 on the vehicle body side through a wiring harness 14 composed of two lead wires 14a and 14b.

The terminals T 1 and T 2 are associated with the control unit 15, and the configuration of the control unit 15 will be described below. The switching circuit 16 is composed of relay switches 17a and 18a in which respective common contacts c are connected to terminals T1 and T2. Each relay switch 17a and 18a includes a battery terminal + B whose normally open contact a is a power supply terminal. And the normally closed contact b is connected to the signal line 19.

The switching circuit 16 has a state in which the relay switch 17a turns on the contacts (c-a) and the relay switch 18a turns on the contacts (c-b) (the first state in the present invention). Terminal T1 and thus the first terminal 9 is connected to the battery terminal + B, and terminal T2 and thus the second terminal 10 is connected to the signal line 19. Further, the switching circuit 16 has a state in which the relay switch 17a turns on between the contacts (c-b) and the relay switch 18a turns on between the contacts (c-a) (corresponding to the second state in the present invention. ), The terminal T2 and thus the second terminal 10 are connected to the battery terminal + B, and the terminal T1 and thus the first terminal 9 are connected to the signal line 19. The terminals T1 and T2 are connected to the line 22 via the diodes 20 and 21 in the forward direction, respectively.

The signal line 19 is connected to the ground terminal via the collector-emitter of the npn-type transistor 23 (corresponding to the switch element in the present invention). Further, a parallel circuit of a resistor 24 and a constant voltage diode 25 having the illustrated polarity is connected between the collector and the emitter of the transistor 23. The Zener voltage of the constant voltage diode 25 is set to, for example, 5V.

On the other hand, the operation command switch 26 is provided in the driver's seat of the automobile, and is of a momentary type that is turned on only when it is operated. The operation command switch 26 has one end connected to the accessory terminal ACC and the other end connected to the ground terminal via the diode 27 and the resistor 28 having the illustrated polarities. As a result, when the operation command switch 26 is turned on, the operation command pulse Pa is generated, and the operation command pulse Pa is output through the lines 27a and 27b connected to the anode and the cathode of the diode 27, respectively. To be done.

The differentiating circuit 29 corresponding to the pulse generating circuit in the present invention is adapted to generate the pulse signal Pb for a fixed time τ 1 (for example, 50 msec) when receiving the operation command pulse Pa from the line 27a. There is. The pulse signal Pb is supplied to the base of the npn-type transistor 32 via the diode 30 and the base bias circuit 31 which are polar in the figure.

The transistor 32 corresponds to the first response circuit in the present invention. When the transistor 32 is turned on by the pulse signal Pb, the exciting coil 17b of the relay switch 17a is energized from the battery terminal + B. It is supposed to do. Therefore, when the transistor 32 is turned on, the switching circuit 16 is turned on between the first state (the contact (c-a) of the relay switch 17a and the contact (c-b) of the relay switch 18a). It will be switched to the ON state).

The cathode of the diode 30 is connected to the ground terminal via the collector-emitter of the npn transistor 33 corresponding to the invalidating circuit in the present invention, and therefore the transistor 33 is turned on. In the state, the function of the transistor 32 will be invalidated. In this case, the terminal T2 is connected to the base of the transistor 33 through the diode 34, the constant voltage diode 35, and the base bias circuit 36, which have the illustrated polarities. The Zener voltage of the constant voltage diode 35 is set to a value higher than the Zener voltage (5V) of the constant voltage diode 25 and lower than the output voltage (12V) of the battery terminal + B.

The integrating circuit 37, which corresponds to the delay circuit in the present invention, outputs the operation command pulse Pa from the line 27a for a time τ2 (for example, longer than the generation time τ1 (50 msec) of the pulse signal from the differentiator 29). The operation command pulse Pa delayed by the integrating circuit 37 is applied to the base of the npn-type transistor 40 via the diode 38 and the base bias circuit 39 having the polarities shown in the figure. It has become.

The transistor 40 corresponds to the second response circuit in the present invention. When the transistor 40 is turned on by the operation command pulse Pa, the exciting coil 18b of the relay switch 18a is energized from the battery terminal + B. It is supposed to do. Therefore, when the transistor 40 is turned on, the switching circuit 16 is turned on between the second state (the contact (c-b) of the relay switch 17a and the contact (c-a) of the relay switch 18a). It will be switched to the ON state).

The cathode of the diode 38 is connected to the ground terminal via the collector-emitter of an npn-type transistor 41 corresponding to the invalidating circuit of the present invention, and therefore the transistor 41 is turned on. In the state, the function of the transistor 41 is invalidated. In this case, the terminal T1 is connected to the base of the transistor 41 via the diode 42, the constant voltage diode 43, and the base bias circuit 44 having the polarities shown. The zener voltage of the constant voltage diode 43 is set to a value larger than the zener voltage (5V) of the constant voltage diode 25 and smaller than the output voltage (12V) of the battery terminal + B, like the constant voltage diode 35. It is set.

The timer circuit 45 is provided with a differentiating circuit 46 having a relatively large time constant (for example, 15 seconds) which is set so as to receive the voltage signal applied to its input point 45 a, and a differentiating pulse is output from the differentiating circuit 46. The structure is provided with an npn-type transistor 47 which is turned on during the period of being turned on and a pnp-type transistor 48 which is turned on by being biased by the resistors 48a and 48b when the transistor 47 is turned on. In this case, the signal line 19 is connected to the input point 45a through the diode 49 having the polarity shown in the figure, and the collector of the transistor 48 constituting the output stage of the timer circuit 45 has the polarity shown in the figure. It is connected through the diode 50.

The collector of the transistor 48 is connected to the base of the transistor 23 via a diode 51 of the polarity shown, a base bias circuit 52, and an on-delay capacitor 53 of the transistor 23. It is connected to the collector of the transistor 33 via a diode 54 and a resistor 55 having the polarities shown, and is also connected to the collector of the transistor 41 via a diode 56 and a resistor 57 having the polarities shown. The emitter of the transistor 48 is connected to the line 22.

The collector of the transistor 48 is connected to a point A in the figure through a diode 58 and a resistor 59 having the polarities shown in the figure. The point A is connected to the point A of the transistor 48 via a diode 60 having the polarities shown in the figure. It is connected to the base. A line 27b connected to the cathode of the diode 27 is connected to the point A through a resistor 61 and a capacitor 62, and a ground terminal is connected through a diode 63 of the polarity shown in the figure.

Next, the operation of the above configuration will be described. (1) When the operation command switch 26 is turned on while the door mirror 4 is not in the retracted position ... When the door mirror 4 is not in the retracted position, the retracted position detection switch 7 is turned on as shown in FIG. While being turned on, the return position detection switch 8 is either on or off.

When the operation command switch 26 is turned on in this state, the operation command pulse Pa is output to the line 27a, so that the differentiating circuit 29 receiving this generates the pulse signal Pb for a fixed time τ1 (50 msec). As a result, the transistor 32 is turned on only during the output period of the pulse signal Pb.

Then, the exciting coil 17b is energized to turn on the contact (ca) of the relay switch 17a, so that the output voltage of the battery terminal + B is between the contact (ca), the diode 42 and the output. The voltage is applied to the base of the transistor 41 via a constant voltage diode 43 that breaks down due to the voltage, and the transistor 41 is turned on. This prohibits the transistor 40 from turning on.

At this time, the first terminal 9 on the side of the door mirror 4 comes to be connected to the battery terminal + B via the lead wire 14a and the contact point (ca) of the relay switch 17a. In this state, since the relay switch 18a turns on between the contacts (c-b), the second terminal 10 on the door mirror 4 side remains connected to the signal line 19.

In this case, since the storage position detection switch 7 is turned on as described above, the storage position detection switch 7, the motor 6 and the first diode are directed from the battery terminal + B toward the signal line 19. A current flows through 11 and a signal voltage corresponding to the Zener voltage (5V) of the constant voltage diode 25 appears in the signal line 19. In this state, the voltage applied to the motor 6 is lower than the starting voltage of the motor 6, so that the motor 6 merely functions as a resistor and does not rotate.

At this time, the signal voltage appearing on the signal line 19 is applied to the constant voltage diode 35 via the diode 34, but the Zener voltage of the constant voltage diode 35 is set to be higher than 5V. Therefore, the transistor 33 does not turn on, and the state in which the transistor 32 is turned on by the pulse signal Pb is maintained.

When the signal voltage appears on the signal line 19 as described above, the timer circuit 45, which receives the signal voltage via the diode 49, starts the timer operation for a predetermined time (15 seconds). The transistor 48 is kept in the ON state. Therefore, the output voltage of the battery terminal + B comes to be supplied to the base bias circuit 31 for the transistor 32 via the diode 20, the transistor 48, the diode 54, etc., and the on-state of the transistor 32 becomes the pulse. It will be held even after the disappearance of the signal Pb. At this time, the output voltage of the battery terminal + B is applied to the base bias circuit 52 via the diode 20, the transistor 48, and the diode 51, so that the transistor 23 is turned on after a short delay time due to the capacitor 53. It

Then, from the battery terminal + B to the contact (c-a) of the relay switch 17a, between the storage position detection switch 7, the motor 6, the first diode 11, and the contact (c-b) of the relay switch 18a, and Since the energization path leading to the ground terminal through the transistor 23, that is, the energization path for the normal rotation of the motor 6, is formed, a current flows in the direction of the arrow A in the motor 6, and accordingly, the door mirror 4 moves in the storage position direction. The rotation starts.

When the door mirror 4 is rotated to the stowed position, the forward rotation energization path of the motor 6 as described above is shut off in response to the turning off of the stowed position detection switch 7, so that the door mirror 4 is moved. It will be stopped at the storage position. When the door mirror 4 is in the locked state and is not rotated to the storage position during the rotation, the transistor 48 is turned off at the time when the timer circuit 45 times up, and the transistor 23, Since 32 is turned off, the motor 6 is cut off and the relay switch 17a returns to the initial state in which the contact point (c-b) is turned on.

(2) When the operation command switch 26 is turned on while the door mirror 4 is in the retracted position ... With the door mirror 4 in the retracted position, as shown in FIG. 7 is turned off and the return position detection switch 8 is turned on.

When the operation command switch 26 is turned on in this state, the transistor 32 is turned on for a fixed time τ1 (50 msec) by the pulse signal Pb from the differential circuit 29 as described above, and the relay switch is accordingly responded. 17a is turned on between contacts (c-a). However, in this case, since the storage position detection switch 7 is turned off, no signal voltage appears on the signal line 19.

After the operation command switch 26 is turned on, when the predetermined time τ1 elapses, the pulse signal Pb disappears and the transistor 32 is turned off. Therefore, the relay switch 17a turns on between the contacts (c-b). It will be returned to the initial state.

Then, when the time τ2 (100 msec) set in the integrating circuit 37 has elapsed after the operation command switch 26 is turned on, the operation command pulse Pa delayed by the integrating circuit 37 changes the diode 38 and the base bias. Since it is given to the base of the transistor 40 via the circuit 39, the transistor 40 is turned on.

Then, the exciting coil 18b is energized to turn on the contact point (ca) of the relay switch 18a, so that the output voltage of the battery terminal + B passes through the diode 34 and the like between the contact points (ca). Is applied to the base of the transistor 33 to turn on the transistor 33, which prohibits the transistor 32 from turning on.

At this time, the second terminal 10 on the door mirror 4 side comes to be connected to the battery terminal + B via the lead wire 14b and the contact (ca) of the relay switch 18a. In this state, since the relay switch 17a turns on between the contacts (c-b), the first terminal 9 on the door mirror 4 side remains connected to the signal line 19.

In this case, since the return position detection switch 8 is turned on as described above, the return position detection switch 8, the motor 6 and the second diode are directed from the battery terminal + B toward the signal line 19. A current flows through 12 and a signal voltage corresponding to the Zener voltage (5V) of the constant voltage diode 25 appears in the signal line 19. In this case as well, the motor 6 merely functions as a resistor and does not rotate.

At this time, the signal voltage appearing on the signal line 19 is applied to the constant voltage diode 43 via the diode 42, but the Zener voltage of the constant voltage diode 43 is set to be higher than 5V. Therefore, the transistor 41 does not turn on, and the operation command pulse Pa keeps the transistor 40 turned on.

When the signal voltage appears on the signal line 19 as described above, the timer circuit 45 starts the timer operation for a predetermined time (15 seconds) as described above, and the transistor 48 is turned on during the timer operation period. Held in a state. Therefore, the output voltage of the battery terminal + B is applied to the base bias circuit 39 for the transistor 40 via the diode 21, the transistor 48, the diode 56, etc., and the on-state of the transistor 40 is turned on. Even after the operation command pulse Pa disappears, it will be held. At this time, the output voltage of the battery terminal + B is applied to the base bias circuit 52 via the diode 21, the transistor 48, and the diode 51, so that the transistor 23 is turned on after a slight delay time due to the capacitor 53. It

Then, from the battery terminal + B to the contact (c-a) of the relay switch 18a, between the return position detection switch 8, the motor 6, the second diode 11, and the contact (c-b) of the relay switch 17a, and Since the energization path leading to the ground terminal through the transistor 23, that is, the reverse rotation energization path of the motor 6, is formed, a current flows in the direction opposite to the arrow A in the motor 6, and accordingly the door mirror 4 is moved from the storage position. The rotation starts toward the return position.

Then, when the door mirror 4 is rotated to the return position, the reverse rotation energization path of the motor 6 as described above is cut off in response to the turning-off of the return position detection switch 8, so that the door mirror 4 is moved. It will be stopped at the return position. If the door mirror 4 is in the locked state and is not rotated to the return position while the door mirror 4 is being rotated, the transistor 48 is turned off when the timer circuit 45 has timed out. Since 40 is turned off, the motor 6 is cut off and the relay switch 18a returns to the initial state in which the contact points (c-b) are turned on.

(3) When the operation command switch 26 is turned on while the door mirror 4 is being rotated ... With the door mirror 4 being rotated, the transistor 48 is turned on and the relay switches 17a and 18a are turned on. Since any one of them is turned on between the contacts (c-a), the capacitor 62 is charged in the illustrated polar state via the diode 58 and the like. When the operation command switch 26 is turned on in this state, the operation command pulse Pa output to the line 27b is superposed on the terminal voltage of the capacitor 62 in response to this, and such an operation command pulse Pb is generated. Is applied to the base of transistor 48.

Therefore, the transistor 48 is forcibly turned off, the motor 6 is accordingly cut off, the rotation of the door mirror 4 is stopped, and the relay switches 17a, 18a, The timer circuit 45 and the like are initialized.

In short, according to the configuration of the present embodiment described above, a so-called storage priority function of preferentially performing the turning operation of the door mirror 4 to the storage position when the operation command switch 26 is turned on. Is obtained. In this case, when the forward / reverse energization control of the motor 6 provided on the door mirror 4 side is performed, it is only necessary to connect the door mirror 4 and the vehicle body side by the wire harness 14 including the two lead wires 14a and 14b. Therefore, the cost can be reduced. Moreover, since the storage position detection switch 7 and the return position detection switch 8 required on the side of the door mirror 4 may have a simple contact structure that simply turns on and off, the cost associated with the complicated contact structure as in the conventional configuration. This will eliminate the risk of increasing reliability and reducing reliability against failures.

[0059]

[Effect of device]

 According to the present invention, as is clear from the above description, it is possible to obtain the storage priority function while using the storage position detection switch and the return position detection switch having a simple contact structure that is simply turned on and off. At the same time, the number of lead wires required for the wiring harness that connects the door mirror side to the car body side is only two, which can realize a sufficient cost reduction effect and improve the reliability against failures. It has a practical effect of being able to obtain it.

[Brief description of drawings]

FIG. 1 is a connection diagram showing an embodiment of the present invention.

FIG. 2 is a diagram showing operation modes of a storage position detection switch and a return position detection switch.

FIG. 3 is a plan view of an automobile

[Explanation of symbols]

In the drawings, 1 is an automobile, 4 and 5 are door mirrors, 6 is a motor, 7 is a storage position detection switch, 8 is a return position detection switch, 9 is a first terminal, 10 is a second terminal, and 11 is a first
Diode, 12 is a second diode, 14 is a wiring harness, 14a and 14b are lead wires, 15 is a control unit, 16 is a switching circuit, and 17a and 18a.
Is a relay switch, 19 is a signal line, 23 is a transistor (switch element), 26 is an operation command switch, 29
Is a differentiation circuit (pulse generation circuit), 32 is a transistor (first response circuit), 33 is a transistor (invalidation circuit), 37 is an integration circuit (delay circuit), 40 is a transistor (second response circuit), 41 Is a transistor (invalidation circuit), and 45 is a timer circuit.

Claims (1)

[Scope of utility model registration request] 1. A door mirror provided with a motor housed in the door mirror. When the motor is energized in the forward direction, the door mirror is rotated toward the storage position, and when energized in the reverse direction, the door mirror is rotated in the opposite direction. In a control device for an electric mirror for an automobile, the switch is turned to the side of the door mirror between the first terminal and one end side of the motor, which is configured to be turned off when the door mirror is in the storage position. A storage position detection switch connected thereto; a return position detection switch connected between a second terminal and the other end of the motor and configured to turn off when the door mirror is in the return position; A first diode that is connected in parallel with the position detection switch to form a forward direction energization path of the motor via the storage position detection switch; A second diode connected in parallel with the detection switch to form a reverse current passage of the motor via the return position detection switch, and when the vehicle body is switched to the first state The first terminal is connected to a power supply terminal, the second terminal is connected to a signal line, and the second terminal is connected to the power supply terminal and the first terminal when the second state is switched to. To the signal line, an automatic reset type operation command switch that outputs an operation command pulse when operated externally, and a pulse generation circuit that generates a pulse signal for a fixed time when the operation command pulse is output. A first response circuit that switches the switching circuit to a first state only during the generation period of the pulse signal, and the operation command pulse when the pulse signal is generated. A delay circuit that delays for a longer time, a second response circuit that is operated by an operation command pulse delayed by the delay circuit to switch the switching circuit to a second state, and a signal voltage appears on the signal line And a timer circuit that performs a timer operation for a predetermined time, and is provided so as to be turned on only during the timer operation time of this timer circuit, and an energization path to the door mirror side via the switching circuit is formed according to the turning on. A switch element and a function of the first response circuit when the switching circuit is in the second state and a function of the second response circuit that is disabled when the switching circuit is in the first state. A control device for an electric door mirror for an automobile, comprising a disabling circuit for disabling.