JPH08223954A - Fixed position stopper for driver - Google Patents

Abstract

PURPOSE: To prevent lock current from flowing uselessly into a motor by providing a switching means for operating a response means during the period when a charging current is flowing into a capacitor and forming a forward or reverse conduction path for the motor under ON state during that operating state. CONSTITUTION: Every time an operating switch 19 is turned to a different operating position, a capacitor 22 is charged from an initial state with a predetermined time constant. During the charging interval of the capacitor 22, a transistor 30 or 32 in a switching means 28 is turned ON. Under ON state, forward conduction path of a motor 13 via the operating switch 19 and a first position detection switch 16 connected with a first operating position, i.e., between contacts c1-a1 and c2-a2, or reverse conduction path of the motor 13 via the operating switch 19 and a second position detection switch 18 connected with a second operating position, i.e., between contacts c1-b1 and c2-b2, is conducted. With such a circuit, the lock current can be prevented from flowing uselessly into the motor 13.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fixed position stopping device for a driving device, which is adapted to reciprocate a moving body between a first position and a second position in response to switching between forward and reverse energization of a motor. .

[0002]

2. Description of the Related Art For example, in a control device for an electric door mirror for a vehicle, a mirror housing of the door mirror is provided with a returning position in a state of protruding in a direction substantially orthogonal to the door and a storage position in a state of being substantially parallel to the door. It is configured to be reciprocally rotated by remote operation between them, and FIG. 5 shows a schematic circuit configuration of a control device of this type.

That is, in FIG. 5, the left and right mirror units 1 and 2 have basically the same configuration, and only one mirror unit 1 is specifically shown here. In the mirror unit 1, the motor 3 is for rotating the mirror housing via the power transmission mechanism, and rotates the mirror housing in the return position direction in response to energization in the forward direction (direction of arrow H). Then, the mirror housing is rotated toward the storage position in response to the energization in the opposite direction. A positive temperature coefficient thermistor 4 for suppressing an overcurrent is interposed between the motor 3 and the terminal T1. Further, between the motor 3 and the terminal T2, a series circuit of the diode 5 and the return position detection switch 6 of the illustrated polarity and a series circuit of the diode 7 and the storage position detection switch 8 of the illustrated polarity are connected.

The position detection switches 6 and 8 are for detecting the rotational position of the mirror housing.
Turns on and off in the mode shown in. That is, the return position detection switch 6 is in an off state when the mirror housing is in the return position and a position in front of the return position, and is in an on state when the mirror housing is in other positions. The storage position detection switch 8 is configured to be in an off state when the mirror housing is in the storage position and to be in an on state when the mirror housing is not in the storage position.

The operation switch 9 is composed of a seesaw switch and is configured to be held at three positions of a return command position, a neutral position and a storage command position. At the return command position where the contacts (c1 -a1) and (c2 -a2) are turned on, the operation switch 9 operates from the power supply terminal IG to the motor through the positive temperature coefficient thermistor 4, the diode 5 and the return position detection switch 6. At the storage command position in which the positive direction energization path 3 is formed and the contacts (c1 -b1) and (c2 -b2) are turned on, the storage position detection switch 8, the diode 7 and the positive temperature coefficient thermistor 4 are connected from the power supply terminal IG. To form a reverse current path of the motor 3 via the.

As a result, when the operation switch 9 is operated to the storage command position while the mirror housing is not in the storage position, the motor 3 is driven in the reverse direction via the storage position detection switch 8 which is turned on in that state. An energization path is formed and the mirror housing is rotated toward the storage position. When the mirror housing is rotated to the storage position, the storage position detection switch 8 is turned off and the motor 3 is cut off.

Further, when the operation switch 9 is operated to the return command position while the mirror housing is in the retracted position or in the intermediate position between the retracted position and the retracted position, the return position detecting switch 6 turned on in that state is used. As a result, a forward direction energization path of the motor 3 is formed, and the mirror housing is rotated toward the return position. When the mirror housing is rotated to the return position, the return position detection switch 6 is turned off and the motor 3 is cut off. FIG. 5 shows a state in which the motor 3 is thus cut off (state in which the mirror housing is in the return position).

[0008]

In the above conventional structure, the operation switch 9 is provided with the neutral position.
In actual use, the operation switch 9 is often left in the return command position or the storage command position. Therefore, for example, when the movement of the mirror housing is locked due to foreign matter being caught in the mirror housing at the return position (the storage position detection switch 8 is turned on), the operation switch 9 is retracted. When the command position (between contacts (c1-b1) and (c2-b2) is turned on) remains operated, the lock current flows to motor 3 unnecessarily without the user's knowledge. The problem arises that the situation will continue. In addition, for example, the operation switch 9 is in a state of being operated to the return command position where the contacts (c1 -a1) and (c2 -a2) are turned on (in this state, the mirror housing is normally in the return position). ), When the mirror housing is manually rotated in the retracted position direction, the forward direction energization path of the motor 3 is formed in response to the return position detection switch 6 being turned on. It causes a problem that it begins to move carelessly in the direction. Furthermore, the operation switch 9
Since the three positions are set, the size of the switch is inevitably increased, and therefore, there is a problem that the installation space of the operation switch 9 is increased and the degree of freedom in design is lowered.

The present invention has been made in view of the above circumstances, and an object thereof is to reliably prevent a situation in which a lock current flows unnecessarily to a motor and to prevent a situation in which a moving body moves carelessly. It is an object of the present invention to provide a fixed-position stop device for a drive device that can be prevented, and that can be downsized with respect to the operation switch to improve the degree of freedom in design.

[0010]

In order to achieve the above object, the present invention is a motor for moving a moving body back and forth between a first position and a second position in response to switching between forward and reverse energization. In a fixed position stopping device of a drive device, the moving body is provided so as to operate in response to the movement of the moving body between the first position and the second position, and the moving body has a first position. And a second position detection switch configured to turn off only when the moving body is in the second position and a positive position of the motor. It is provided so as to be operated in any one of a first operation position for energizing in the direction and a second operation position for energizing the motor in the opposite direction, and is always held in any of the above operation positions. Operation switch that shows the Each time the operation switch is operated to a different operation position, a capacitor is charged from an initial state with a predetermined time constant, a response means that is operated while a charging current is flowing through this capacitor, and this response means is in an operating state. Is provided so as to be turned on during a certain period of time, and in the on state, the forward direction energization path of the motor via the operation switch and the first position detection switch in the first operation position, or the second direction. And a switching means for forming a reverse-direction energization path of the motor via the operation switch and the second position detection switch at the operation position (1).

In this case, the switching means may be configured to be turned off in conjunction with the switching of the first position detection switch or the second position detection switch from the on state to the off state. (Claim 2).

[0012]

In the device according to claim 1,
The first position detection switch is turned on when the moving body is in a state other than the first position (including the state in which the moving body is in the second position). From this state, when the operation switch is operated to the first operation position for energizing the motor in the forward direction and held in the operation position, the capacitor is charged from the initial state with a predetermined time constant. become. Then, the response means is operated while the charging current is flowing through the capacitor, and the switching means is turned on during the operation state.

In this case, since the operation switch is in the first operation position, when the switching means is turned on as described above, the forward direction of the motor is passed through the operation switch and the first position detection switch. The electric path is formed, and accordingly, the moving body starts to move in the first position direction. Then, when the moving body is moved to the first position, the first position detection switch is turned off, so that the motor is cut off in response to the turning off,
The moving body comes to be stopped at the first position.

The second position detection switch is turned on when the moving body is in a state other than the second position (including the state in which the moving body is in the first position). From this state, when the operation switch is operated to the second operation position for energizing the motor in the reverse direction and held in the operation position, the capacitor is charged from the initial state with a predetermined time constant. become. Then, the response means is operated while the charging current is flowing through the capacitor, and the switching means is turned on during the operation state.

In this case, since the operation switch is in the second operation position, when the switching means is turned on as described above, the motor is operated in the reverse direction via the operation switch and the second position detection switch. The electric path is formed, and accordingly, the moving body starts to move in the second position direction. Then, when the moving body is moved to the second position, the second position detection switch is turned off, so that the motor is cut off in response to the turning off,
The moving body comes to be stopped at the second position.

Here, even after the moving body has been moved to the first position or the second position as described above, the operation switch remains held at the first operation position or the second operation position. However, when a predetermined time elapses after the charging of the capacitor is started, the charging of the capacitor is completed and the charging current stops flowing, so that the operating state of the response means is canceled and the switching means is turned off. . Therefore, for example, before the moving body reaches the first position, that is, before the first position detection switch is turned off, the motor remains in the locked state and a lock current flows to the motor. Even if it happens,
Since the motor is cut off in response to the completion of charging the capacitor, it is possible to reliably prevent the situation in which the lock current flows unnecessarily to the motor.

Further, when the operation switch is held in the first operation position or the second operation position, the capacitor is in a fully charged state and charging current does not flow, so that the response means operates. And therefore the switching means is kept in the off state. Therefore, for example, when the operating body is in the first operating position and the moving body is in the first position, that is, when the first position detecting switch is turned off, the moving body is manually operated as described above. Even when the first position detection switch is switched to the ON state after being moved from the first position, there is no possibility that the moving body will inadvertently move toward the first position as in the conventional configuration. Moreover, since it is sufficient to set the operation switch to two positions, the operation switch can be downsized and the degree of freedom in design can be improved.

According to another aspect of the present invention, the switching means that is turned on during the operation of the response means is such that when the first position detection switch or the second position detection switch is switched from the on state to the off state. In other words, the moving body is the first
When the moving body is moved to the first position or the second position according to the energization of the motor, the motor is turned off. The power will be cut off immediately. Therefore, the charging time constant of the capacitor can be set longer considering the fluctuation of the applied voltage, and the charging of the capacitor is inadvertently finished while the moving body is moving, and the response means stops operating. It is possible to reliably prevent the occurrence of such a situation, that is, the situation where the power supply to the motor is stopped midway.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment in which the present invention is applied to a control device for an electric door mirror for a vehicle will be described below with reference to FIGS. In FIG. 1 showing the electrical configuration, the left and right mirror units 11 and 12 have basically the same configuration. Here, one mirror unit 11 is used.
Only the parts of the mirror unit 12 which are the same as those of the first embodiment will be designated by the same reference numerals, and the description thereof will be omitted. In the mirror unit 11, the motor 13 is for rotating a mirror housing corresponding to the moving body in the present invention via a power transmission mechanism (neither is shown), and its forward direction (direction of arrow H). ), The mirror housing is rotated toward the return position (corresponding to the first position in the invention), and the mirror housing is retracted to the retracted position (corresponding to the first position in the present invention) in response to the energization in the opposite direction (counter arrow H direction). It corresponds to the second position in the present invention). A positive temperature coefficient thermistor 14 for suppressing an overcurrent is provided between the motor 13 and the terminal T1.
Is interposed. Further, between the motor 13 and the terminal T2, the diode 15 and the return position detection switch 16 having the illustrated polarities (corresponding to the first position detection switch in the present invention).
Is connected to the series circuit of the diode 17 and the storage position detection switch 18 (corresponding to the second position detection switch in the present invention) of the illustrated polarity.

The position detecting switches 16 and 18 are
It is for detecting the rotation position of the mirror housing,
It is turned on and off in a mode as shown in FIG. That is, the return position detection switch 16 is in an off state when the mirror housing is in the return position and a position in front of the return position, and is in an on state when the mirror housing is in other positions. The storage position detection switch 18 is configured to be in an off state when the mirror housing is in the storage position and to be in an on state when the mirror housing is not in the storage position.

The operation switch 19 is composed of, for example, a two-circuit changeover type push-lock switch, and has a return command position (corresponding to the first operation position in the present invention) and a storage command position (second in the present invention). 2) of the operating position
It is designed to be held in position. The operation switch 19 is provided at a position where the driver can easily operate it in the passenger compartment, and the contact (c
1-a1) and contact (c2-a2) are turned on, the return command position, contact (c1-b1) and contact (c2-b)
2) It can be selectively switched to the storage command position where the interval is turned on.

In this case, in the operation switch 19, the common contacts c1 and c2 are connected to the power supply lines L1 and L2, respectively, the switching contacts a1 and b2 are connected to the power supply terminal IG, and the switching contacts a2 and b1 are ground terminals. Connected to. The power supply line L1 has a normally open relay switch 2 included in the relay 20 as a switching means.
0a is connected to each terminal T1 of the mirror units 11 and 12, and the power supply line L2 is connected to the terminal T2 of the mirror units 11 and 12.

A constant voltage circuit 21 is connected between the power supply lines L1 and L2. This constant voltage circuit 21 has a line L
A series circuit of a resistor 21a, a constant voltage diode 21b and a diode 21c having the illustrated polarities is connected between 1 and L2, and the constant voltage diode 21b and the diode 2 are connected.
It is configured by connecting a series circuit of a constant voltage diode 21d and a diode 21e of opposite polarities to the series circuit of 1c in parallel, and generating a predetermined constant voltage output from point A in the figure. .

Between the point A, which is the output terminal of the constant voltage circuit 21, and the power supply line L2, a capacitor 22 and a resistor 2 are provided.
3, the diode 24 and the resistor 25 having the polarities shown in the drawing are connected in series, and the diode 24 and the resistor 25 are connected.
A series circuit of a diode 26 having a polarity opposite to that of the diode 24 and a resistor 27 is connected in parallel with the series circuit of FIG.

The exciting coil 20b of the relay 20 has one end connected to the power supply line L1 and the other end connected to the power supply line L2 via the switching circuit 28 corresponding to the response means in the present invention. The switching circuit 28
Is a series circuit between the collector and the emitter of the diode 29 and the npn type transistor 30 of the illustrated polarity, and the diode 31 and the pnp type of the opposite polarity to the diode 29 between the other end of the exciting coil 20b and the power supply line L2. It is configured by connecting a series circuit of a transistor 32 in parallel, the base of the transistor 30 is connected to the cathode of the diode 24, and the base of the transistor 32 is connected to the anode of the diode 26.
In addition, between the collectors and the emitters of the transistors 30 and 32, constant voltage diodes 33 and 34 for overvoltage protection are provided.
Are connected in the illustrated polarity state.

Next, the operation of the above configuration will be described.
Now, assume that the mirror housing is in the retracted position. In this state, the return position detection switch 16 is turned on, and as will be apparent from the description below, the operation switch 19 switches between the storage command positions (contacts (c1-b1) and contact points (c2-b2)). The switch 22 is operated to the ON position), and accordingly, the capacitor 22 changes to the resistance 2
It is charged in a state where the point A has a negative potential through 7 and the diode 26. From this state, when the operation switch 19 is operated to the return command position (the position where the contacts (c1-a1) and the contact (c2-a2) are turned on) and is held at the return command position, the capacitor 22 The charging charge of the resistor 23, diode 24, resistor 2
5, the capacitor 22 is discharged through the operation switch 19, etc., and thereafter the capacitor 22 is charged with a predetermined time constant from the initial state by the output of the constant voltage circuit 21 (the charging direction is the arrow Q direction). ).

Then, the transistor 30 in the switching circuit 28 is turned on during the period when the discharging current and the charging current of the capacitor 22 are flowing, and during the period when the transistor 30 is turned on in this way, The operation switch 19 is connected to the exciting coil 20b of the relay 20.
Also, the relay switch 20a is turned on by being energized through the transistor 30 and the like.

As a result, the operation switch 19, the relay switch 20a, the positive temperature coefficient thermistor 14, the diode 1
5. The forward direction energization path of the motor 13 (the energization path in the direction of the arrow H) is formed via the return position detection switch 16, and accordingly, the mirror housing is started to rotate in the return position direction. become. After that, when the mirror housing is moved to the return position, the return position detection switch 16 is turned off, so that the motor 13 is cut off.

Here, even after the mirror housing is rotated to the return position as described above, the operation switch 1
9 remains held at the return command position, but when a predetermined time has elapsed after the charging of the capacitor 22 was started, the charging of the capacitor 22 is completed and the charging current stops flowing. The operating state of the transistor 30 is released, and the relay switch 20a is turned off. Further, when the operation switch 19 is held at the return command position, the capacitor 22 is in the fully charged state and the charging current does not flow. Therefore, the transistor 3 in the switching circuit 28 is not supplied.
0 does not turn on, and therefore the relay switch 20a is held in the off state.

In this way, when the mirror housing is moved to the return position (in this case, the storage position detection switch 18 is turned on, and the operation switch 19 is operated between the return command positions (contacts (c1 -a1) and contact ( 1 is operated to a position (ON position between c2 and a2)), the capacitor 22 is charged through the resistor 23, the diode 24 and the like in a state where the point A has a positive potential. . From such a state, when the operation switch 19 is operated to the storage command position (the position where the contacts (c1-b1) and the contacts (c2-b2) are turned on) and is held at the storage command position, the capacitor 22 Charge of the resistor 21
a, the operation switch, the resistor 27, the diode 26, and the like, and then the capacitor 22 is charged by the output of the constant voltage circuit 21 from the initial state with a predetermined time constant (charging). The direction is the opposite arrow Q direction).

Then, the transistor 32 in the switching circuit 28 is turned on during the period when the discharge current and the charging current of the capacitor 22 are flowing, and during the period when the transistor 32 is turned on in this way, The operation switch 19 is connected to the exciting coil 20b of the relay 20.
Also, the relay switch 20a is turned on by being energized through the transistor 32 and the like.

As a result, a reverse conduction path (a conduction path in the direction opposite to the arrow H) of the motor 13 via the operation switch 19, the storage position detection switch 18, the diode 17, the positive temperature coefficient thermistor 14, and the relay switch 20a is formed. As a result, the mirror housing starts to rotate in the retracted position in response to this. After that, when the mirror housing is moved to the storage position, the storage position detection switch 18 is turned off, so that the motor 13 is cut off.

Here, even after the mirror housing is rotated to the retracted position as described above, the operation switch 1
9 remains held at the storage command position, but when a predetermined time elapses after charging of the capacitor 22 is started, charging of the capacitor 22 is completed and the charging current stops flowing, so that the switching circuit 28 The operating state of the transistor 32 is released, and the relay switch 20a is turned off. Further, when the operation switch 19 is held at the storage command position, the capacitor 22 is in the fully charged state and the charging current does not flow. Therefore, the transistor 3 in the switching circuit 28 does not flow.
Therefore, the relay switch 20a is held in the off state.

In summary, according to the configuration of this embodiment described above, when the operation switch 19 is operated to the return command position or the storage command position, the mirror housing arrives at the return position or the storage position accordingly. Even before the return position detection switch 16 or the storage position detection switch 18 is turned off, even if the motor 13 remains locked and a lock current flows through the motor 13, the capacitor 22 Since the motor 13 is cut off in accordance with the completion of the charging for the motor, it is possible to reliably prevent the situation in which the lock current flows unnecessarily to the motor 13.

Further, when the operation switch 19 is kept in the return command position or the storage command position, the capacitor 22 is in the fully charged state and no charging current flows. Therefore, the transistor 30 in the switching circuit 28 does not flow.
Alternatively, 32 does not operate on, and thereby the relay switch 20a is held in the off state. Therefore, for example, the mirror housing is in the return position (in this state, the operation switch 19 has the contacts (c1 -a1) and (c1 -a1)
2−a2) is in the return command position where it is turned on), that is, when the return position detection switch 16 is turned off, the mirror housing is manually moved from the return position and the return position detection switch 16 is turned on. Even when the switch is switched to, there is no fear that the mirror housing will inadvertently move toward the return position as in the conventional configuration.

Moreover, since the operation switch 19 can be constituted by a two-position type push-lock switch,
The operation switch 19 can be downsized and the degree of freedom in design can be improved. Further, since the capacitor 22 is charged by the output of the constant voltage circuit 21, there is no possibility that the charging time may change carelessly, and the time for which the charging current of the capacitor 22 flows, that is, the transistor 30. Alternatively, the precision of the ON period of 32 can be realized, and the above-described control of the stop position of the mirror housing can be reliably performed at all times.

FIG. 3 shows a second embodiment of the present invention, and only the parts different from the first embodiment will be described below. In this embodiment, the constant voltage circuit 21 in the first embodiment is removed, and the exciting coil 20b of the relay 20, the capacitor 22, and the relay 22 are connected between the power supply lines L1 and L2.
Switching circuit 35 corresponding to the response means in the present invention
Are connected as follows. That is, between the power supply lines L1 and L2, a resistor 36, a diode 37 of the illustrated polarity,
A series circuit of the capacitor 22 and the resistor 38 is connected, and a series circuit of the resistor 39 and the diode 37 and a diode 40 having an opposite polarity is connected in parallel with the series circuit of the resistor 36 and the diode 37. The exciting coil 20b has one end connected to the power supply line L1 via the switching circuit 35 and the other end connected to the power supply line L2 via the diode 41 having the illustrated polarity.

The switching circuit 35 includes a series circuit between the emitter / collector of the pnp transistor 42 and the diode 43 having the polarity shown in the figure, and the npn transistor 4 between the power supply line L1 and one end of the exciting coil 20b.
Between the emitter and collector of 4 and diode 4 of the polarity shown
5 is connected in parallel with a series circuit of 5 and the base of the transistor 42 is connected to the anode of the diode 37 and the base of the transistor 44 is connected to the cathode of the diode 40. In addition, constant voltage diodes 46 and 47 for overvoltage protection are connected between the collectors and emitters of the transistors 42 and 44, respectively, in the illustrated polarity state.

The common connection point of the exciting coil 20b and the diode 41 (cathode of the diode 41) is
It is connected to the newly added terminal T3,
The terminal T3 is connected to the common connection point of the diode 15 and the return position detection switch 16 in the mirror units 11 and 12 via the diode 48 having the illustrated polarity, respectively.

The operation of the second embodiment thus constructed is as follows. Now, the mirror housing is in the retracted position, that is, the return position detection switch 16 is turned on,
Moreover, the operation switch 19 moves to the storage command position (contact (c1 -b
1) and the contact (c2-b2) are turned on). In this case, the capacitor 22 is charged in a state in which the point B in FIG. 3 has a negative potential, and from this state, the operation switch 19 causes the operation switch 19 to return to the return command position (contact (c1-a1)) and contact ( c2 −
a2) is operated to the ON position) and is held at the return command position, the charge of the capacitor 22 is charged by the resistor 38, the operation switch 19, the resistor 36, the diode 3
7, and then the capacitor 22 is charged with a predetermined time constant from the initial state by the output of the power supply terminal IG (the charging direction is the arrow Q direction).

Then, the transistor 42 in the switching circuit 35 is turned on during the period when the discharging current and the charging current of the capacitor 22 are flowing, and during the period when the transistor 42 is turned on in this way, Operation switch 1 for exciting coil 20b of relay 20
9, the transistor 42, the diodes 43 and 49, and the return position detection switch 16 are energized to turn on the relay switch 20a.

As a result, the operation switch 19, the relay switch 20a, the positive temperature coefficient thermistor 14, the diode 1
5. The forward direction energization path of the motor 13 (the energization path in the direction of the arrow H) is formed via the return position detection switch 16, and accordingly, the mirror housing is started to rotate in the return position direction. become. After that, when the mirror housing is moved to the return position, the return position detection switch 16 is turned off, so that the motor 13 is cut off, the energization path of the exciting coil 20b is cut off, and the relay switch 20a is turned off. Become so. Further, when the operation switch 19 is held at the return command position, the capacitor 22 is in the fully charged state and the charging current does not flow, so that the transistor 42 in the switching circuit 35 does not turn on. .

In this way, when the mirror housing is moved to the return position (the storage position detection switch 18 is turned on, and the operation switch 19 is returned to the return command position (contact (c1
-A1) and contact (c2 -a2) ON position)
Is operated to), the capacitor 22 is
The point is charged with a positive potential. From such a state, when the operation switch 19 is operated to the storage command position (the position where the contacts (c1-b1) and the contacts (c2-b2) are turned on) and is held at the storage command position, the capacitor 22 The charged electric charge of the capacitor 22 is discharged through the diode 40, the resistor 39, the operation switch 19, the resistor 38, etc.
However, due to the output of the power supply terminal IG, the battery is charged with a predetermined time constant from the initial state (the charging direction is the opposite arrow Q direction).

Then, the transistor 44 in the switching circuit 35 is turned on during the period when the discharging current and the charging current of the capacitor 22 are flowing, and during the period when the transistor 44 is turned on in this way, Operation switch 1 for exciting coil 20b of relay 20
The relay switch 20a is turned on by being energized through the diode 9, the diode 41, the transistor 44, and the like.

As a result, a reverse conduction path (a conduction path in the opposite arrow H direction) of the motor 13 via the operation switch 19, the storage position detection switch 18, the diode 15, the positive temperature coefficient thermistor 14, and the relay switch 20a is formed. As a result, the mirror housing starts to rotate in the retracted position in response to this. After that, when the mirror housing is moved to the storage position, the storage position detection switch 18 is turned off, so that the motor 13 is cut off.

Here, even after the mirror housing is rotated to the retracted position as described above, the operation switch 1
9 remains held in the storage command position, but when a predetermined time elapses after the charging of the capacitor 22 is started, the charging of the capacitor 22 is completed and the charging current stops flowing. The operating state of the transistor 44 is released, and the relay switch 20a is turned off. Further, when the operation switch 19 is kept in the storage command position, the capacitor 22 is in the fully charged state and the charging current does not flow. Therefore, the transistor 4 in the switching circuit 35 does not flow.
Therefore, the relay switch 20a is held in the off state.

In short, in this embodiment, the relay switch 20a is turned off when the return position detection switch 16 is switched from the on state to the off state in response to the mirror housing being rotated to the return position. Therefore, when the mirror housing is rotated to the return position according to the energization of the motor 22, the motor 22 is immediately cut off. Therefore, the charging time constant of the capacitor 22 can be set long considering the fluctuation of the applied voltage, and the charging of the capacitor 22 ends carelessly during the rotation of the mirror housing to the return position. As a result, it is possible to reliably prevent the situation in which the transistor 42 is turned off, that is, the situation in which the power supply to the motor 13 is stopped midway.

In the second embodiment, the relay switch 20a is turned off in conjunction with the return position detecting switch 16 being switched from the on state to the off state in response to the mirror housing being rotated to the return position. However, with the configuration shown in FIG. 4 showing the third embodiment of the present invention, the return position detection switch 16 changes from the on state to the off state in response to the mirror housing being rotated to the return position. The relay switch 20a can be turned off by interlocking with each of the case where the switch is switched and the case where the storage position detection switch 18 is switched from the on state to the off state in response to the mirror housing being rotated to the storage position. .

That is, in order to realize such an operation, the terminal T3 is connected to the mirror unit 1 as shown in FIG.
The common connection points of the diode 15 and the return position detection switch 16 in 1 and 12 are respectively connected via the diodes 48 of the illustrated polarities, and the terminal T is also connected.
3 is a diode 17 in the mirror units 11 and 12.
And the common connection point of the storage position detection switch 18,
It suffices to connect them through the diodes 49 having the polarities shown in the drawing.

The present invention is not limited to the control device for the electric door mirror for a vehicle applied in the above-described first to third embodiments, but may be applied to a fixed position stopping device for a driving device having a moving body moved by a motor. It is widely applicable.

[Brief description of drawings]

FIG. 1 is an electric circuit configuration diagram showing a first embodiment of the present invention.

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

FIG. 3 is an electric circuit configuration diagram showing a second embodiment of the present invention.

FIG. 4 is an electric circuit configuration diagram showing a third embodiment of the present invention.

FIG. 5 is an electric circuit configuration diagram showing a conventional example.

FIG. 6 is a schematic diagram showing operation modes of a storage position detection switch and a return position detection switch.

[Explanation of symbols]

In the drawing, 11 and 12 are mirror units, 13 is a motor,
Reference numeral 16 is a use position detection switch (first position detection switch), 18 is a storage position detection switch (second position detection switch), 19 is an operation switch, 20 is a relay (switching means), 21 is a constant voltage circuit, 22 Is a capacitor,
Reference numerals 28 and 35 denote switching circuits (responsive means).

Claims (2)

[Claims] 1. A home position stop device for a drive device, comprising a motor for reciprocating a moving body between a first position and a second position in accordance with forward and reverse energization switching, wherein the moving body is the first A first position detection switch which is provided so as to operate in response to being moved between the first position and the second position, and is configured to be turned off only when the moving body is in the first position. And a second position detection switch configured to turn off only when the moving body is in the second position, a first operation position for energizing the motor in the forward direction, and a reverse direction to the motor. An operation switch which is provided so as to be operated in any of the second operation positions for energization and which is always held in any of the above operation positions, and this operation switch is operated to a different operation position. Initial state every time A capacitor that is charged with a predetermined time constant, a response unit that is operated while a charging current is flowing through this capacitor, and a response unit that is provided so as to turn on during the period when the response unit is in the operating state. , The forward direction energization path of the motor through the operation switch and the first position detection switch in the first operation position, or the operation switch and the second position in the second operation position A fixed-position stop device for a drive device, comprising: a switching unit that forms a reverse current-carrying path of the motor via a detection switch. 2. The switching means is configured so that when the first position detection switch or the second position detection switch is switched from an on-state to an off-state, it is turned off in conjunction with this. The fixed-position stop device for a drive device according to claim 1, wherein: