JPH1159274A - Electrically retracting car door mirror of automobile - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the space of the electrically retracting units and to increase flexibility in constituting the mechanism parts of the electrically retracting units and to lessen the resistance to environment required for the door mirrors mounted outside the vehicle. SOLUTION: The mounting positions of right and left switch circuits 7 are removed from the electrically retracting units 2L, 2R of door mirrors mounted outside the vehicle (right and left mirror assemblies 3L, 3R) to a control switch SW mounted inside a compartment. This can reduce the space of the electrically retracting units 2L, 2R, while the space of the control switch SW side is changed little, and increases flexibility in constituting the mechanism parts of the electrically retracting units 2L, 2R and lessens the resistance to environment required for the door mirrors mounted outside the vehicle (right and left mirror assemblies 3L, 3R).

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention comprises a door mirror mounted on the outside of a vehicle, for example, a door, and a control switch device mounted on the inside of the vehicle, for example, near a driver's seat. By operating the case switch, the drive motor of the door mirror is energized to rotate the mirror assembly of the door mirror from the standing position to the storage position or from the storage position to the standing position,
In addition, the present invention relates to an electric retractable door mirror device for a motor vehicle that stops energization of a drive motor by a function of a switch circuit when a mirror assembly is located at a predetermined position and stops the mirror assembly at an upright position or a retracted position. By relocating the circuit from the door mirror to the control switch device side, the space on the control switch device side does not change much,
The space on the electrical unit side can be made compact, and the degree of freedom in the structure of the mechanical parts on the electrical unit side increases.
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric retractable door mirror device for an automobile in which environmental resistance on a door mirror side mounted outside the vehicle is reduced.

[0002]

2. Description of the Related Art An electric retractable door mirror device for an automobile will be described below with reference to FIGS. FIG. 12 is a partially cutaway plan view of a door mirror (left side door mirror in the illustrated example) mounted on the outside of a vehicle, such as a door, and FIG. 13 is mounted on the inside of the vehicle at a location near the driver's seat. 1 is a plan view of a control switch device to be used.

In FIG. 12, reference numeral 1 denotes a mirror base fixed to a door (not shown) of an automobile. The mirror base 1 is equipped with an electronic unit 2.

The electronic unit 2 includes a shaft holder 20 fixed to the mirror base 1 and a shaft 21 provided (fixed) integrally with the shaft holder 20.
A gear case 22 which is rotatably mounted on the fixed member side of the shaft 21 and the shaft holder 20 around the axis of the shaft 21 and has an upper opening, and a water-tight mounting on an edge of an upper opening of the gear case 22. Cover 2
3, a drive motor M, a speed reduction mechanism 24, and a clutch mechanism 25 housed in the cover 23 and the gear case 22.
And The speed reduction mechanism 24 and the clutch mechanism 25 described above are interposed between the drive motor M and the shaft 21. The gear case 22 of this electronic unit 2
The mirror assembly 3 is mounted on the rotating member side.

The mirror assembly 3 has a mirror body 30 having a mirror surface (mirror surface) on a front surface, and a heater (for example, PT) provided on the back surface of the mirror body 30.
It comprises a C-plane heating element 31, a mirror holder 32, a mirror housing 33 having an opening on the front surface, and a power unit 34 mounted in the mirror housing 33. The above-mentioned mirror body 30 and the like (including the heater 31 and the mirror holder 32) are attached to the above-mentioned power unit 34 so as to be tiltable up, down, left and right, and are arranged at the front opening of the above-mentioned mirror housing 33.

The above-mentioned mirror base 1 and electronic unit 2
A door mirror is constituted by the mirror assembly 3 (including a fixing member, a rotating member, a drive motor M, and the like).
The door mirrors are attached to the left and right doors of the vehicle, respectively.

In FIG. 13, SW is a control switch device attached to the inside of the vehicle, such as at a location near a driver's seat (not shown). The control switch device SW includes an electronic switch SW1 (polarity conversion switch mechanism) for performing a standing operation and a storing operation of the left and right mirror assemblies 3 (3L, 3R), and a tilting operation of the mirror surface 30 of the door mirror up, down, left and right. Remote control switch SW2 (four-way changeover switch mechanism), and left and right changeover switch SW3 (two-way changeover switch mechanism) for selecting a left side mirror or a right side mirror when tilting the mirror surface 30 up, down, left and right. It is composed of

As shown in FIG. 14, the electrical switch SW1, the remote control switch SW2, and the left / right switch SW3 of the control switch device SW are connected to the electrical unit 2L of the door mirrors (mirror assemblies 3L, 3R) on both the left and right sides. , Drive motors ML1 and MR1 in 2R
And the motor ML2 in the power units 34L and 34R,
The ML3, MR2, and MR3 sides are electrically connected to the power supply ACC (+) and the ground E (-) via a harness.

In the illustrated example, the heater 31
The heater switch for turning ON / OFF the power supply to the switch is provided separately from the control switch device SW described above, but may be provided integrally with the control switch device SW.

As shown in FIG. 14, left and right switch circuits 6L and 6R are provided in the electrical units 2L and 2R of the left and right door mirrors (mirror assemblies 3L and 3R), respectively. These switch circuits 6L and 6R
When the mirror assemblies 3L and 3R are located at predetermined positions, the power supply to the drive motors ML1 and MR1 is cut off to stop the mirror assemblies 3L and 3R at the standing position or the storage position. For example, as shown in FIG. 15 (remote control switch SW2, left / right changeover switch SW3, left and right power units 34L, 34R are omitted), the left and right switch circuits 6L, 6R are provided with left and right first PTC elements (PTC1L, PTC1L, PTC1R)
And left and right second PTC elements (PTC2L, PTC2R)
Left and right first diodes (D1L, D1R), left and right second diodes (D2L, D2R), left and right relay contacts (R-SL, R-SR), and left and right relay coils (R-CL, R -CR), left and right startup capacitors (CL, CR), and left and right relay self-holding resistors (R-
RL, R-RR) and left and right discharge resistors (RDL, RD)
R).

Next, the operation of the electric retractable door mirror device of the vehicle will be described. First, the electronic switch SW1 of the control switch device SW is operated.
For example, as shown in FIG. 15, when the movable contacts C, C of the electrical switch SW1 are switched from the fixed contacts B, B to the fixed contacts A, A, the drive motors ML1, MR1 are driven to drive the speed reduction mechanism 24 and the clutch. By the action of the mechanism 25, the mirror assemblies 3L and 3R rotate with respect to the mirror base 1 from the upright position (use position) to the storage position (backward tilt position). When the mirror assembly 3 reaches the predetermined storage position, the power to the drive motors ML1 and MR1 is cut off by the operation of the switch circuits 6L and 6R, and the mirror assemblies 3L and 3R are positioned at the storage positions. Become.

The movable contact C of the electrical switch SW1,
When C is switched from the fixed contacts A, A to the fixed contacts B, B, the drive motors ML1, MR1 are driven and the speed reduction mechanism 24 is driven.
By the action of the clutch mechanism 25, the mirror assemblies 3L and 3R rotate relative to the mirror base 1 from the storage position (backward tilt position) to the standing position (use position). When the mirror assembly 3 reaches the predetermined upright position, the operation of the switch circuits 6L and 6R cuts off the current to the drive motors ML1 and MR1 so that the mirror assemblies 3L and 3R are located at the upright position. Become.

When the left / right switch SW3 of the control switch device SW is switched to the left or right and the remote control switch SW2 is operated up / down / left / right, the left or right door mirrors (mirror assemblies 3L, 3R) are provided.
Mirror surface 30 tilts up, down, left and right. When the mirror assembly 3 is manually rotated, the clutch mechanism 2 is rotated.
5, the mirror assembly 3 is raised, stored,
It can be located in the forward tilt position. Further, when an external force is applied to the mirror assembly 3 located at the standing position,
By the operation of the clutch mechanism 25, the mirror assembly 3 is turned to the retracted position and the forwardly inclined position for buffering.

[0014]

However, in the above-mentioned conventional electric retractable door mirror device for a vehicle, the left and right switch circuits 6L and 6R are composed of the right and left door mirrors (mirror assemblies 3L and 3R). Since it is built in the 2R, the space on the side of the electronic units 2L and 2R becomes large, and the mechanical parts (the drive motor M, the speed reduction mechanism 24, the clutch mechanism 25) on the side of the electronic units 2L and 2R become large. The degree of freedom in configuration is small. Also, since the switch circuits 6L and 6R of the electric circuit are built in the electrical units 2L and 2R of the door mirror installed outside the vehicle, the environmental resistance (waterproof, dustproof and dustproof) of the electrical units 2L and 2R is provided. Sex) must be strict.

According to the present invention, the space on the electronic unit side can be made compact, the degree of freedom in the structure of the mechanical parts on the electronic unit side can be increased, and the environmental resistance on the door mirror side installed outside the vehicle can be reduced. To provide an electric retractable door mirror device for an automobile.

[0016]

In order to achieve the above-mentioned object, the present invention is characterized in that the switch circuit is rearranged from the electronic unit side of the door mirror to the control switch device side.

As a result, in the electric retractable door mirror device for a vehicle according to the present invention, the switch circuit is rearranged from the electronic unit side of the door mirror mounted outside the vehicle to the control switch device side mounted inside the vehicle. Although the space on the device side does not change much, the space on the electrical unit can be made more compact, the degree of freedom in the configuration of the mechanical components on the electrical unit increases, and the environment resistance on the door mirror side installed outside the vehicle Is reduced.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of an electric retractable door mirror device for a vehicle according to the present invention will be described below with reference to FIGS. In the drawing, the same reference numerals as those in FIGS. 12 to 15 denote the same components. It should be noted that, by connecting “′” and “′” in FIG. 8 and FIG. 9, an overall exploded perspective view of the electronic unit is obtained.

As shown in FIG. 1, the electric retractable door mirror device for a vehicle according to the present invention in this embodiment, as shown in FIG. 1, connects left and right switch circuits 7 to the left and right door mirrors (mirror assemblies 3 L, 3 R) mounted outside the vehicle. Case unit 2L,
The rearrangement is made from the 2R side to the control switch device SW side mounted in the vehicle.

The left and right switch circuits 7 are shown in FIG. 2 (illustration of the remote control switch SW2, the left and right changeover switch SW3, and the left and right power units 34L and 34R is omitted).
As shown in FIG. 7, when the left and right mirror assemblies 3L and 3R are physically stopped and the left and right drive motors ML1 and MR1 are overloaded, the temperature rises to a certain temperature range. The first PTC elements (PTC1L, PTC1L,
TC1R) and left and right second PTC elements (PTC2L, PTC2
TC2R), and the electrical switches S
W1 and left and right drive motors ML1 and MR1 and left and right first PTC elements (PTC1
L, PTC1R) and left and right second PTC elements (PTC2
L, PTC2R) and left and right first PTC elements (PTC1
L, PTC1R) and left and right second PTC elements (PTC2
L, PTC2R) and a first diode (D
1) and the left and right common second diodes (D2) and the relay coils (R) of the left and right relay circuits that are demagnetized by the switching operation of the left and right first PTC elements (PTC1L, PTC1R) or the left and right second PTC elements (PTC2L, PTC2R). -CL, R-CR) and the first PTC on the left and right
Element (PTC1L, PTC1R) and left and right second PTC
Element (PTC2L, PTC2R), left and right common first diode (D1), and left and right common second diode (D
2) and the left and right drive motors ML1,
The left and right drive motors ML1, MR1 and the left and right are driven by the demagnetization of the left and right relay coils (R-CL, R-CR) and the left and right relay coils (R-CL, R-CR) connected in parallel with MR1. Of the first PTC element (PTC1
L, PTC1R) and left and right second PTC elements (PTC2
L, PTC2R) are the relay contacts (R-SL, R-SR) of the left and right relay circuits that cut off the current supply to the left and right relay coils (R-CL, R-CR). And the left and right drive motors ML1, MR1, the left and right first PTC elements (PTC1L, PTC1R), the left and right second PTC elements (PTC2L, PTC2R), the left and right common first diode (D1), and the left and right common second diode (D2) ), The relay contacts (R-SL, R-SR) of the left and right relay circuits connected in series with the left and right relay coils (R-CL, R-CR) while activating the left and right drive motors ML1, MR1. The left and right relay coils (R) are common starting capacitors (C) to be excited.
-CL, R-CR) and the left and right first
PTC elements (PTC1L, PTC1R) and left and right second
PTC elements (PTC2L, PTC2R), left and right common first diode (D1), left and right common second diode (D2), and left and right relay contacts (R-SL, R-SR)
And a left and right common start-up capacitor (C) connected in parallel with the left and right drive motors ML1 and MR1, and a left and right relay self-hold for holding the excited state of the left and right relay coils (R-CL, R-CR). Resistors (R-RL, R-RR), left and right relay contacts (R-SL, R-SR), left and right relay coils (R-CL, R-CR), and left and right first PTC elements (PTC1L, PTC1R), the left and right second PTC elements (PTC2L, PTC2R), the left and right common first diode (D1), and the left and right common second diode (S2) are connected in series, and the left and right drive motors ML1, MR1 and Left and right relay self-holding resistors (R-RL, R-RR) connected in parallel with the left and right common starting capacitor (C) and the left and right common starting capacitor (C) A discharge resistor (RD), is connected in series with collector-rated switch SW1, and the left and right of the 1P
TC element (PTC1L, PTC1R) and left and right second P
TC element (PTC2L, PTC2R), left and right common first diode (D1), left and right common second diode (D2), left and right drive motors ML1, MR1, left and right relay contacts (R-SL, R-SR) and Left and right relay coils (R-CL, R-CR), left and right common starting capacitors (C) and left and right relay self-holding resistors (R-
RL, R-RR) and a common left and right discharge resistor (RD) connected in parallel.

The above-described control switch device SW includes:
As shown in FIGS. 3 to 6 (note that hatching is omitted in FIGS. 4 to 6), a case 8 and an electronic switch SW1 disposed on the upper surface of the case 8 so as to be able to be pushed back. Push switch 80 and a remote control switch SW2 disposed on the upper surface of the case 8 so as to be swingable in four directions.
Push plate 81 and a slide knob 82 for a left / right changeover switch SW3 disposed on the upper surface of the case 8 so as to be slidable in two directions.

As shown in FIGS. 4 to 6, the above-mentioned left and right switch circuits 7 are provided on a first electric circuit board (printed circuit board) PCB1 with the above-mentioned electronic components (the first left and right first circuit boards).
TC element (PTC1L, PTC1R), left and right second PT
C element (PTC2L, PTC2R), left and right common first diode (D1), left and right common second diode (D
2), left and right relay contacts (R-SL, R-SR), left and right relay coils (R-CL, R-CR), left and right common startup capacitors (C), left and right relay self-holding resistors (R -RL, R-RR) and a discharge resistor (R
D)), the first electric circuit board PCB1
Are vertically housed in the case 8 of the control switch device SW described above. This first electric circuit board PCB1
And the push knob 80 are electrically and mechanically connected via a polarity conversion switch mechanism 83.

On the other hand, the electronic components (not shown) of the above-mentioned remote control switch SW2 and left / right switch SW3 are the second
The second electric circuit board PCB2 is mounted on an electric circuit board (printed circuit board) PCB2, and is horizontally accommodated in an upper portion of the case 8 of the control switch device SW. This second electric circuit board PCB
The electronic component of the second remote control switch SW2 and the push plate 81 are electrically and mechanically connected via an actuator 84 and a contact 85 of a four-way switch mechanism. Also, the second electric circuit board PCB2
Parts of the left / right switch SW3 and the slide knob 8
2 is electrically and mechanically connected via a slider 86 and a contact 87 of a two-way switch mechanism. The control switch device SW described above connects the power supply ACC (+) and the ground E by connecting a power supply and a ground side connector (not shown) to the terminal 88.
It is electrically connected to the (-) side.

Next, the configuration of the left and right door mirrors on the electrical unit 2 side will be described with reference to FIGS. The gear case 22 and the cover 23 of the electronic unit 2 are fitted in a watertight manner. That is, a seal projection 222 is provided integrally on the entire periphery of the upper opening of the gear case 22, and a seal recess 231 is provided on the entire periphery of the lower opening of the cover 23. A seal material 223 is applied and interposed between the seal 222 and the seal recess 231 over the entire circumference.

The speed reducing mechanism 24 housed in the cover 23 and the plate 27 of the electronic unit 2 and the gear case 22
Is one end (upper end) of the rotating shaft as shown in FIGS.
Is attached to the shaft of the drive motor M via the joint 240, and the first worm 2
A first helical gear 243 as a first worm wheel meshed with the first gear 41 and supported by the gear case 22 by a pin 242; a small gear 244 integrally fixed to the first helical gear 243; A large gear 245 meshed with the gear 244, a second worm 246 mounted on the center through hole of the large gear 245 by a D-cut surface so that one end of the rotation shaft is axially movable and non-rotatably mounted,
The second worm 246 is engaged with the pin 24
7, a second helical gear 248 as a second worm wheel that is supported by the gear case 22 and the plate 27
And is composed of Here, the above-described first helical gear 242 (first-stage worm gear) as the first worm 241 and the first worm wheel, and the second helical gear 244 (second-stage worm gear) as the second worm 243 and the second worm wheel. Worm gear) constitutes a two-stage worm gear.

As shown in FIG. 9, the cover 23 and the plate 27 of the electronic unit 2 and the clutch mechanism 25 housed in the gear case 22 are provided with a push nut 250 fitted to the shaft 21 in order from the top, Compression spring 251, clutch gear 252, clutch holder 2
53 and washers 254 and 255. The above-described clutch gear 252 is rotatable with respect to the shaft 21 and has a locking groove on the lower surface. The above-described clutch holder 253 is fixed to the shaft 21 and has a locking claw on the upper surface. The push nut 250 described above is used for the shaft 2
The compression spring 251 is compressed by engaging with the engagement groove at the upper end of the first compression spring 251. Due to the elastic force of the compression spring 251, the locking claw on the upper surface of the clutch holder 253 is locked in the locking groove on the lower surface of the clutch gear 252, and the clutch gear 252 and the clutch holder 253 are in a connected state.

The above-mentioned electronic unit 2 has a ball 28 and a groove 280 of a stopper mechanism for physically stopping and positioning the mirror assembly 3 at a predetermined standing position or storage position.
Is provided. That is, a pair of arc-shaped grooves 280 are provided on the fixed surface on the upper surface of the shaft holder 20. As shown in FIG. 11, the arc-shaped groove 280 has a step 281 on the upright position (use position) and a step 282 on the storage position (rearward tilting position) with a height H cut up at right angles at both ends. Having. Note that the bottom surface of the above-described arc-shaped groove 280 only needs to be smooth, and for example, may have a gently upward convex shape as shown by a two-dot chain line in FIG.
On the other hand, two balls 28 are rotatably provided on the rotation surface on the lower surface of the gear case 22. When the ball 28 hits the step 281 on the upright position side as shown by the solid line in FIG. 11, the mirror assembly 3 is in a state of protruding laterally from the vehicle body as shown by the solid line in FIG. It is located in a standing position. When the ball 28 hits the step 282 on the storage position side as shown by the dashed line in FIG. 11, the mirror assembly 3 moves along the vehicle body as shown by the dashed line in FIG. It is located at the storage position in a state of being tilted backward. Further, when the ball 28 rides up from the arc-shaped groove 280 in the direction of arrow A as shown by a two-dot chain line in FIG. As a result of the rotation, it is in a state of being tilted forward along the vehicle body as shown by a two-dot chain line in FIG. The height H of the steps 281 and 282 of the above-mentioned arc-shaped groove 280 and the height of the ball 28
Is a stopper that cannot be run by the torque of the drive motor M, but can be run by manual or shock-absorbing rotation.

In FIGS. 7 and 8, reference numerals 4 and 5 indicate a drive motor side connector and a power supply side connector. By connecting the drive motor side connector 4 and the power supply side connector 5, the drive motor M in the electronic unit 2 and the power supply A
The CC and the ground E are electrically connected. The drive motor-side connector 4 is provided in the cover 23 of the electronic unit 2 near the upper side of the drive motor M so as to cross the drive motor M in a direction crossing (almost orthogonal to) the axial direction of the shaft 21. And a pair of conductive members 41 electrically connected to the drive motor M. The conductive member 41 is inserted into the drive motor M by the insertion hole 40.
A terminal 410 that is electrically connected in a direction of an opening from the bottom of the insertion hole 40 and a fixing portion 41 that is fixed to the driving motor M in a manner of being sandwiched from the bottom of the insertion hole 40 in the direction of the opening.
1 and a connecting portion 411 extending across the drive motor M from the bottom of the insertion hole 40 to the opening. On the other hand, the power supply side connector 5 includes an insertion portion 50 made of, for example, an insulating member inserted into the insertion hole 40, and the drive motor side connector 4 when the insertion portion 50 is inserted into the insertion hole 40. A connecting portion (not shown) made of, for example, a conductive member electrically connected to the connecting portion 412, the harness 52 electrically connected to the connecting portion, and the insertion portion 5
0, and a step 53 provided substantially in the middle of
And an O-ring 54 set at

The electric retractable door mirror device for an automobile according to the present invention in this embodiment has the above-described configuration, and the operation of the retractable standing operation will be described below. First,
As shown in FIG. 2, the movable contacts C, C of the electrical switch SW1 in the control switch device SW are fixed contacts B,
Switching connection is made from B to fixed contacts A, A. Then, a current flows from the left and right common start-up capacitor (C) to the left and right relay coils (R-CL, R-CR), and the left and right relay coils (R-CL, R-CR) are excited. The left and right relay contacts (R-SL, R-SR) are turned on. As a result, the current from the power supply ACC (+)
Left and right first diode (D1) → left and right first PTC
Element (PTC1L, PTC1R) → left and right relay contact (R-SL, R-SR) → left and right drive motor (ML1,
MR1), the left and right drive motors (ML1, M
R1) rotates (forward rotation). On the other hand, a part of the current is supplied to the left and right relay contacts (R-SL, R-SR) → the left and right relay self-holding resistors (R-RL, R-RR) → the left and right relay coils (R-CL, R-SR). CR), the ON state of the left and right relay contacts (R-SL, R-SR) is self-held.

The left and right mirror assemblies 3L and 3R are rotated from the upright position to the storage position by the rotational force of the left and right drive motors (ML1 and MR1). When the left and right mirror assemblies 3L and 3R reach the storage positions, which are the predetermined stop positions, the stopper is activated, that is, the moving ball 28 hits the step 282 of the fixed-side arc-shaped groove 280. The left and right mirror assemblies 3L and 3R are physically and forcibly stopped at the storage positions that are predetermined stop positions. At this time, the left and right drive motors (M
L1, MR1) is overloaded, and an overcurrent flows in the electric circuit. Due to this overcurrent, the internal temperature of the left and right first PTC elements (PTC1L, PTC1R) rises, and when a certain temperature range is reached, the left and right first PTC elements (PTC1L, PTC1L,
PTC1R) The internal resistance increases rapidly, and the first
The PTC elements (PTC1L, PTC1R) perform a switching operation. Then, the left and right relay coils (R-CL,
R-CR) is cut off and the left and right relay contacts (R
-SL, R-SR) self-return to the OFF state,
Power supply to the left and right drive motors (ML1, MR1) is cut off. As a result, the rotation (drive) of the left and right drive motors (ML1, MR1) is stopped, and the left and right mirror assemblies 3L,
3R stops completely at the storage position.

Next, the movable contact C of the electrical switch SW1,
C is switched from the fixed contacts A, A to the fixed contacts B, B. Then, a current flows from the left and right common start-up capacitor (C) to the left and right relay coils (R-CL, R-CR), and the left and right relay coils (R-CL, R-CR) are excited. Left and right relay contacts (R-SL,
R-SR) is turned on. As a result, the power supply ACC
The current from (+) is supplied to the left and right drive motors (ML1, MR
1) → Left and right relay contacts (R-SL, R-SR) Left and right second PTCs (PTC2L, PTC2R) → Left and right common second diode D2, so left and right drive motors (ML1, MR1) rotate ( Reverse). On the other hand, part of the current is transferred to the left and right relay coils (R-CL, R-CR) →
Left and right relay self-holding resistors (R-RL, R-RR) →
Since the current flows to the left and right relay contacts (R-SL, R-SR), the ON state of the left and right relay contacts (R-SL, R-SR) is self-held.

The left and right mirror assemblies 3L and 3R are rotated from the upright position to the retracted position by the rotational force of the left and right drive motors (ML1 and MR1). Then, when the left and right mirror assemblies 3L and 3R reach the standing positions, which are predetermined stop positions, the stoppers operate, and the left and right mirror assemblies 3L and 3R are physically and forcibly moved in the standing positions that are the predetermined stop positions. Is stopped. At this time, the left and right drive motors (ML1, MR1) are overloaded, and an overcurrent flows in the electric circuit. Due to this overcurrent, the left and right second PTC elements (PTC2L, PTC2
R), the internal resistance of the left and right second PTC elements (PTC2L, PTC2R) rapidly increases when the internal temperature of the left and right second PTC elements (PTC2L, PTC2R) increases.
L, PTC2R) performs a switching operation. Then
The energization to the left and right relay coils (R-CL, R-CR) is cut off, the left and right relay contacts (R-SL, R-SR) self-return to the OFF state, and the left and right drive motors (M
L1, MR1) is cut off. As a result, the rotation (drive) of the left and right drive motors (ML1, MR1) stops, and the left and right mirror assemblies 3L, 3R completely stop at the upright position.

As described above, in the electric retractable door mirror device for a vehicle according to the present invention in this embodiment, the left and right switch circuits 7 are mounted on the exterior mirrors (left and right mirror assemblies 3L, 3R) of the electronic unit 2L. By rearranging from the 2R side to the control switch device SW mounted in the vehicle, the space on the control switch device SW side does not change much, but the space on the electronic unit side can be made compact.

That is, as shown in FIGS. 3 to 6, the case 8 of the control switch device SW has the electrical switch SW1, the remote control switch SW2, and the left / right switch SW3 arranged on a plane. Requires size and has a terminal 88 inside
And a space for connecting a power supply ACC and a connector (not shown) on the side of the ground E to the terminal 88 is required, so that a certain size is required in the height direction. As a result, the space in the case 8 is increased to some extent. For this purpose, in the case 8, the polarity conversion switch mechanism 83 of the electrical switch SW1, the actuator 84 and the contact 85 of the remote control switch SW2 (four-way switch mechanism), and the left / right switch SW3 (two-way switch mechanism) ), Electronic components (first left and right PTC elements (PTC1L, PTC1R), left and right second PTC elements (PTC2L, PTC2R), left and right common first diode (D1), left and right common second diode (D2), left and right relay contacts (R-SL, R-SR),
Left and right relay coils (R-CL, R-CR), left and right common starting capacitors (C), left and right relay self-holding resistors (R-RL, R-RR), and left and right common discharging resistors (RD) ) Is newly added, the space in the case 8 does not change much.

On the other hand, the degree of freedom is increased in the configuration of the mechanical parts on the side of the electronic units 2L and 2R where the left and right switch circuits 7 are eliminated. In addition, the environmental resistance (waterproofness and dustproofness) of the door mirrors (the left and right mirror assemblies 3L and 3R) provided outside the vehicle is reduced.

In particular, in this embodiment, the first diode D1, the second diode D2, the starting capacitor C, and the discharging resistor RD of the left and right switch circuits 7 can be made common to the left and right. And the number of parts can be reduced as compared with the switch circuits respectively arranged in the electronic units 2L and 2R.

In the above-described embodiment, the electric retractable door mirror device of the automobile is fixed to the door of the automobile, but may be fixed to the body other than the door.

[0038]

As is apparent from the above description, in the electric retractable door mirror device of the present invention, the switch circuit is rearranged from the electronic unit side of the door mirror mounted outside the vehicle to the control switch device side mounted inside the vehicle. As a result, the space on the control switch device side does not change much, but the space on the electrical unit can be made compact, the degree of freedom in the structure of the mechanical parts on the electrical unit increases, and it is installed outside the vehicle. Environmental resistance on the side of the door mirror is reduced.

[Brief description of the drawings]

FIG. 1 is an electric circuit diagram showing an embodiment of an electric retractable door mirror device for an automobile according to the present invention.

FIG. 2 is an electric circuit diagram showing a main part of the present invention.

FIG. 3 is a plan view of a control switch.

FIG. 4 is a sectional view taken along line IV-IV in FIG. 3;

FIG. 5 is a sectional view taken along line VV in FIG. 3;

FIG. 6 is a sectional view taken along line VI-VI in FIG. 3;

FIG. 7 is a cutaway perspective view of the electrical unit.

FIG. 8 is an exploded perspective view of a cover, a drive motor, a plate, and a part of a speed reduction mechanism.

FIG. 9 is an exploded perspective view of a shaft holder, a shaft, a gear case, a part of a speed reduction mechanism, and a clutch mechanism.

FIG. 10 is a plan view of a shaft holder.

11 is a sectional view taken along line XI-XI in FIG.

FIG. 12 is a partially cutaway and partially transparent plan view schematically showing a general electric retractable door mirror.

FIG. 13 is a plan view of a general control switch.

FIG. 14 is an electric circuit diagram of a conventional electric retractable door mirror device of an automobile.

FIG. 15 is an electric circuit diagram of the electronic switch and the left and right switch circuits.

[Explanation of symbols]

1: Mirror base, 2, 2L, 2R: Electric unit, 2
0: shaft holder, 21: shaft, 22: gear case, 23: cover, 24: reduction mechanism, 25: clutch mechanism, 27: plate, 28: ball of stopper mechanism, 2
80: groove of stopper mechanism, M, ML1, MR1: drive motor, 3, 3L, 3R: mirror assembly, 34, 34
L, 34R: power unit, 4: drive motor side connector, 5: power supply side connector, 7: left and right switch circuit, 8
... Control switch case, SW ... Control switch, SW1 ... Electric switch, SW2 ... Remote control switch, SW3 ... Left / right switch, PTC1L, PT
C1R, PTC2L, PTC2R ... PTC element, D1,
D2: Diode, R-CL, R-CR: Relay coil, R-SL, R-SR: Relay contact, R-RL, R-
RR: Relay self-holding resistor, C: Starting capacitor,
RD: discharge resistance, ACC: power supply, E: ground.

Claims (3)

[Claims] 1. A mirror base fixed to an outside of a vehicle such as a door of a motor vehicle, a fixing member including a shaft fixed to the mirror base, and a rotatable attachment about the axis of the shaft to the fixing member. An electronic unit including a rotating member provided, and a driving motor housed in the rotating member; a mirror assembly attached to the rotating member of the electronic unit; A switch circuit for shutting off the power supply to the drive motor when the drive motor is located at a position, and stopping the mirror assembly at an upright position or a retracted position; The mirror assembly is electrically connected to a power supply, and energizes the drive motor to rotate the mirror assembly from the standing position to the storage position or from the storage position to the standing position. In the electrically driven storage type door mirror device of a motor vehicle with a control switch device having a rating switch, the electric retractable door mirror device of a motor vehicle, characterized in that said switching circuit is incorporated in the control switch device. 2. The mirror base comprises left and right mirror bases respectively fixed to the left and right sides of the outside of the vehicle such as a door of an automobile, and the electronic unit includes left and right fixed members respectively mounted on the left and right mirror bases. The mirror assembly includes left and right mirror assemblies respectively attached to the rotating members of the left and right electronic units, and the switch circuit. The electrically driven retractable door mirror device for an automobile according to claim 1, wherein the left and right mirror circuits comprise left and right switch circuits for stopping the left and right mirror assemblies at predetermined positions, respectively. 3. The left and right switch circuits are provided with an overcurrent generated when the left and right mirror assemblies are physically stopped and an overload is applied to the left and right drive motors. The first PTC on the left and right that performs a switching action by rapidly increasing the resistance value when the
A left and right first PTC element and a left and right second PTC element connected in series with each other between the electronic switch and the left and right drive motors in parallel with each other, A first diode common to the left and right and a second diode common to the left and right that are connected in series to the first PTC element on the left and right and the second PTC element on the left and right, respectively, and have mutually different current flowing directions; A relay coil of left and right relay circuits that is demagnetized by a switching operation of a second PTC element, and is connected in series with the left and right first PTC element, the left and right second PTC element, the left and right common first diode, and the left and right common second diode. Relay coils of left and right relay circuits connected in parallel with the left and right drive motors, The 1PTC element and the left and right second 2PT of the left and right drive motors and the left and right by the demagnetization of Rekoiru
A relay contact of left and right relay circuits that cuts off current to the C element, is connected in parallel with the left and right relay coils, and includes the left and right drive motors and the left and right first motors.
A PTC element, left and right second PTC elements, and relay contacts of left and right relay circuits connected in series with the left and right common first diode and the left and right common second diode; A left and right common starting capacitor for exciting a relay coil, which is connected in series with the left and right relay coils, and is connected to the left and right first PTC element, the left and right second PTC element, the left and right common first diode, and the left and right common Second
A left and right common start-up capacitor connected in parallel with the diode and the left and right relay contacts and the left and right drive motors; a left and right relay self-holding resistor for holding an excitation state of the left and right relay coils, The left and right relay contacts, the left and right relay coils, the left and right first PTC elements, the left and right second PTC elements, the left and right common first diode, and the left and right common second diode are connected in series with each other. A drive motor and a left and right relay self-holding resistor connected in parallel with the left and right common starting capacitor, and a left and right common discharging resistor of the left and right common starting capacitor, which are connected in series with the electrical switch. Connected, the first PTC element on the left and right, the second PTC element on the left and right, the first diode common to the left and right, and the common left and right A second diode, the left and right drive motors, the left and right relay contacts, the left and right relay coils, the left and right common starting capacitors, and the left and right relay self-holding resistors connected in parallel with the left and right common discharging resistors; The electric retractable door mirror device for an automobile according to claim 2, comprising: