JPS62134348A - Motor driven door mirror for vehicle - Google Patents

Abstract

PURPOSE:To eliminate the need for minutely adjusting operation and facilitate the assembly of parts by forming a visor position detecting switch with a ring type fixed contact substrate and a ring type rotor, and enabling assembling merely by installing said switch on a visor supporting shaft. CONSTITUTION:In a motor driven door mirror, a visor 2 is rotatably fitted to a visor supporting shaft 3a provided in an integrated form with a stay 1 and, by the operation of a motor 12, the visor 2 is rotated between a using position and a housing position with respect to the stay 1, via a gear train 13 and the engagement of the gear 15 of the gear train 13 with a fixed gear 8 on the supporting shaft 3a. A ring type fixed contact substrate 10 is fixed on top of the fixed gear 8 while, on the other hand, a ring type rotor 11 having a slidable contact members 20a, 20b, 21a, 21b which cooperate with the fixed contact parts 17, 18 of the substrate 10, is rotatably provided above the substrate 10, to form a visor position detecting switch SW. The rotor 11 can be rotated by an actuator 16a.

Description

[Detailed Description of the Invention] Technical Field The present invention is applicable to a visor (a case housing a mirror or a mirror tilting drive device) in a use position, a storage position (backward position), and a forward position (frontward position). The present invention relates to an electric door mirror for an automobile, in which the visor is electrically rotated between the two positions, and the visor is automatically stopped at each of the above positions.

BACKGROUND ART This type of electric door mirror generally employs the following structure in order to allow the visor to rotate between the predetermined positions and automatically stop at each position relative to a stay fixed to the door.

That is, a predetermined portion of the visor is rotatably attached to a visor support shaft formed at a predetermined position of the stay, and an electric motor and a gear train for transmitting the rotation of the electric motor are disposed at a predetermined position within the visor. , a fixed gear is non-rotatably mounted on the outer periphery of the visor support shaft, one rotating gear of the gear train is meshed with the fixed gear, and a visor position detection switch is incorporated into the drive circuit of the electric motor, The visor is configured to rotate relative to the stay between at least the use position and the storage position by driving the motor, and the visor is configured to automatically stop between the use position and the storage position by means of a visor position detection switch. ing. The visor position detection switch is generally configured by a combination of a cam fixed to the visor support shaft and a microswitch fixed to the visor side, and when the microswitch rotates together with the visor, the actuator of the microswitch By working together with the cam, the switch is turned on and off to rotate and automatically stop the visor.

However, with the visor position detection switch configured as described above, it is necessary to finely adjust the distance between the cam and the microswitch actuator in order to automatically stop the visor accurately at the use position or storage position. Since this work is very time-consuming, there is a problem in that it is difficult to assemble the parts.

OBJECTS OF THE INVENTION Accordingly, the present invention solves these problems and provides a visor which has a relatively simple structure, whose parts are easy to assemble, and which allows the visor to rotate and automatically stop accurately. The object of the present invention is to provide an electric door mirror having a position detection switch.

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention was constructed as follows.

That is, the visor position detection switch is mounted on a ring-shaped fixed contact base plate which is non-rotatably mounted around the visor support shaft and above the fixed gear and has a fixed contact member on its upper surface, and the visor support shaft. It consists of a ring-shaped rotor that is rotatably arranged around the shaft and above the fixed contact board, and has a sliding contact member on the lower surface that cooperates with the fixed contact member, and is fixed to the rotor on the visor side. The rotor was configured to rotate with respect to the fixed contact board together with the rotation of the visor by connecting the actuators.

In the above configuration, the visor position detection switch is a so-called slide type switch, and drives and automatically stops the motor by turning it on and off between the use position and the storage position of the visor.

The on/off timing of the visor position detection switch can be easily adjusted by appropriately configuring the arc length of the fixed contact member, that is, the fixed contact.

According to the above configuration, the fixed contact board and rotor that make up the visor position detection switch can be assembled by simply mounting them around the visor support shaft, making it possible to perform fine adjustment as in the conventional microsinch type. Since no work is required, assembly of the parts becomes extremely easy.

In addition, since the visor position detection switch is a slide type switch, both the fixed contact board and the rotor can be configured flat, and these can be assembled on the outer periphery of the visor support shaft. This makes it possible to reduce the size of the visor.

In the above configuration, the fixed contact board is configured as a C-shaped retaining ring, and a claw is formed on the outer periphery of the upper end of the visor support shaft, and the fixed contact board is provided on the outer periphery of the visor support shaft and between the wind and the fixed gear. It is better to configure it so that it can be inserted. Normally, it is necessary to fix the members attached around the visor support shaft with a retaining ring, but by using the fixed contact board in combination with the retaining ring function in this way, it is possible to reduce the number of parts.

Kanjo N Hereinafter, one embodiment of the present invention will be described in detail with reference to the accompanying drawings.

First, according to FIG. 1, a schematic configuration of the main parts of an electric mirror for an automobile will be explained. In the figure, I is a stay fixed to a predetermined position on the outer surface of an automobile door. This stay 1
A visor support shaft 3a is erected at a predetermined portion, that is, at the lower part. Reference numeral 2 denotes a visor, and a predetermined portion of the visor, that is, a lower door-side portion of the visor is rotatably connected to the visor support shaft 3a. At a predetermined position within the visor 2, that is, above the visor support shaft 3a, an m-movement motor 12 and a gear train 13 for transmitting the rotation of the electric motor 12 are arranged. Then, one rotary gear 15 located at the terminal of the gear train I3 is connected to the visor support M
The outer circumferential saw of 3a is meshed with the attached fixed gear 8 that cannot be rotated. Therefore, in the above configuration, by driving the electric motor 12, the visor 2 is moved to the stay 1.
In other words, the visor support shaft 3a and the fixed gear 1
5, it can be rotated between a use position and a storage position. Furthermore, the structure of each part will be explained in detail below.

A predetermined portion of the stay 1 extends laterally to form a visor support portion 1a.1. ing. A visor support member 3 including the visor support shaft 3a is erected on the visor support portion 1a and is fixed with screws.

On the other hand, the predetermined portion of the visor 2 is configured as a supported portion 2a supported by the visor support member 3, and has a cylindrical portion 2b, and the cylindrical portion 2b is attached to the outer periphery of the visor support shaft 3a. It is inserted so that it can rotate freely.

The visor support member 3 and its visor support shaft 3a
The following members are inserted into the outer periphery of the

Each of these elements is also clearly shown in FIG. In the figure, reference numeral 4 denotes a moderating washer, which is attached to the bottom surface of the visor support member 3 and the outer periphery of the visor support shaft 3a, and is attached to the bottom surface of the visor support member 3 and the bottom surface of the supported portion 2a of the visor. There is a moderation function located in between to stabilize the state of the visor 2 in the use position. A coil spring 5 is inserted into the outer periphery of the visor support shaft 3a. Similarly, on the outer periphery of the visor support shaft 3a and above the coil spring 5, a washer link 6, a gear base 7, the fixed gear 8, and a stopper ring 9 are inserted in order toward the ring-shaped or C-shaped fixed contact. There is.

As clearly shown in FIG. 4, the visor support shaft 3a
The outer circumferential surface of has a plurality of grooves 3c extending in the axial direction. On the other hand, the gear base 7 has a protrusion 7a on its inner peripheral surface that fits into the groove 3c of the visor support shaft 3a. Therefore, the gear base 7 can slide in the axial direction with respect to the visor support shaft 3a, but is prevented from rotating.

The fixed gear 8 has a plurality of protrusions 8a on its lower surface, and when the protrusions 8a fit into the recesses 7b formed on the upper surface of the gear base 7, the fixed gear 8 is rotated against the visor support shaft 3a. Although it can slide, it cannot rotate. When an external force is applied to the visor, the fixed gear 8 can rotate by moving upward and disengaging the protrusion 8a from the recess 7b. This absorbs the external force. Further, as clearly shown in FIG. 5, the spur ring 9 and the like are provided with a protrusion 9b on the inner circumferential surface, similar to the gear base 7, and either the 9b or the groove on the visor support shaft 3a Qsr-Muse 11-8? -Death 2-Bu! tX above,
The fixed contact board 10, that is, the C-shaped retaining ring 10, and the rotor 11 constitute a visor position detection switch SW.

The detailed structure of the fixed contact board 10 is shown in FIG. This fixed contact board has a C shape, and on its top surface,
A pair of arc-shaped fixed contact members, that is, fixed contact pieces 17 and 18
It is equipped with As shown in Fig. 8, one fixed contact 1
7 is configured to be sufficiently longer than the other fixed contact piece 18. That is, in the illustrated embodiment, the arc angle of the fixed contact piece 17! On the other hand, the arc angle of the other fixed contact piece 18 is set to a little less than 90 degrees. The fixed contact board IQ serving as the retaining ring is inserted and assembled into the upper end of the visor support shaft 3a from outside in a direction orthogonal to the axial direction. That is, as clearly shown in FIG. 6, the outer periphery of the upper end of the visor support shaft 3a is approximately circular, but a pair of portions facing each other in the diametrical direction are flat 3d.
The inner surfaces of the legs 10b, 10b on both sides of the fixed contact board 10 are in contact with this plane 3d, thereby preventing rotation. Furthermore, this fixed contact board IO
is prevented from escaping upward by engaging with a claw 3b formed at the upper end of the visor support shaft 3a.

Furthermore, this fixed contact board 10 has both legs 10b,
A protrusion 10a is provided on the lower surface side of the IOb, and when this member is assembled to the outer periphery of the visor support shaft 3a, this protrusion 10a fits into a hole 9a formed at a predetermined position of the stopper ring 9 located below. It is supposed to be done.

On the other hand, the rotor 11 is ring-shaped and has a first
As clearly shown in the figure, an appropriate groove or space zb is formed inside the groove 11b, and in this groove 11b, two pairs of sliding contact members, namely two pairs of brushes 20a, which are clearly shown in FIG.
20b; 21a, 2 lb are installed. The bases of these brushes are connected to each terminal 22. On the other hand, these brushes 20a, 20b; 21a, 2 lb
When the rotor 11 is assembled to the visor support shaft 3a, the lower end of the fixed contact member 1 of the fixed contact board 10
It is designed to elastically contact 7°18. Incidentally, the rotor 11 has a claw at its lower part, and this claw is adapted to rotatably engage with the periphery of the fixed contact board 10. Furthermore, this rotor 11 has a pair of vertical walls 1 on its upper surface.
1a, and the lower end of an actuator 16a is inserted between the vertical walls 11a, as best shown in FIG. 2.3. This actuator 16a is the above-mentioned motor!
2 and a part of the gear train 13.
Therefore, as the drive member case 16 rotates, it rotates about the central axis of the visor support shaft 3a. Therefore, the rotor is integrated with this actuator 16a! It will rotate from ■.

The gear train I3 includes a shaft 14, and the lower end of the shaft 14 is supported by a bearing portion 2c formed at a predetermined position of the supported portion 2a of the visor 2.

A rotary gear fixed to the outer periphery of this shaft 14 is meshed with the fixed gear 8. Note that it is supported by a drive member case support portion 2d formed at 2a.

An example of a motor drive circuit using the above-mentioned visor position detection switch SW is shown in FIG.
This is an operation switch that switches and connects the drive motor 12 to the battery 23 in an arbitrary polarity in order to rotate the drive motor 12 in an arbitrary direction. This operation switch 24 is mounted at a predetermined position in the vehicle, for example, on an instrument panel. SW is the visor position detection switch described above. This switch SW
is composed of two switches S,,S,, and S,
, a pair of brushes 20a, 20b and one fixed contact piece 18
The switch S2 is composed of a pair of brushes 21a.
, 21b and the other fixed contact piece 17.

The operation of the electric door mirror having the above configuration will be explained below.

Figure 9 (I) shows the case where the visor is in the forward position/7-
17 , / , , $ C:, x, 4nJ&'Noh, C
壬1 mQl'';211'TI) shows the state of the switch SW when t<1 is in the use position, and Fig. 9 (
11I) is the switch S when the visor is in the retracted position.
It shows the state of W.

As shown in FIG. 9 (11[), when the visor is in the retracted position, one brush 21b of the pair of brushes 2]a, 21b is in contact with the fixed contact 17, while the other brush 21a is in contact with the fixed contact 17. This fixed contact is separated from 17. On the other hand, the pair of brushes 20a and 20b are both in contact with the fixed contact 18. This condition corresponds to the condition shown in FIG. 1O(I).

In this state, when the operation switch 24 is turned downward, the drive current - in the direction of the solid arrow through the switch S.
I flows to motor 12, which rotates the visor toward the use position. While the visor is moving from the storage position to the position just before the use position, use either brush 20.
a, 20b; 21a, 21b also correspond to fixed contacts 18.
17 while sliding. This state is shown in Figure 1O (1
1).

That is, both switches S, , S, are both in the on state. Then, when the visor reaches the predetermined use position, the switch SW is activated in Fig. 9 (11) and Fig. 1O (
The state becomes [). That is, the pair of brushes 20a, 2
One brush 20a of 0b is in contact with the corresponding fixed contact 18, but the other brush 20b is out of contact with the fixed contact 18, so the switch S2 is turned off. on the other hand,
The other plano 21a, 21b remains in contact with the corresponding fixed contact 17. The motor 12 will then stop and the visor will stop at the predetermined use position.

This visor use position is maintained with a sufficient biasing force by the moderating washer 4 described above.

Conversely, when rotating the visor in the use position to the storage position, in the state shown in Figure 1O (11I),
The operation switch 24 may be turned upward. That is,
When the operating switch 24 is turned upward, contrary to the above, a driving current (2) flows in the direction of the broken arrow in the motor 12, and the motor I2 rotates the visor in the direction of the retracted position.

When the visor reaches the normal retracted position, the switch SW enters the state shown in FIG. 9 (11I), that is, the switch S1 is turned off, so that rotation is automatically stopped at this retracted position.

In this embodiment, as described above, the reason why one fixed contact 17 is made to have an arc length approximately twice that of the other fixed contact 18 is as follows. That is, the visor may be forced backward by an external force, or vice versa, when a force is applied to the front, the visor may be forced forward to absorb this force. In this manner, when the switch is tilted forward, the switches S to V become as shown in FIG. 9(1). That is, the pair of brushes 21b and 21a are in contact with the fixed contact 17, and the other pair of brushes 20b,
20a is not in contact with the corresponding fixed contact 18. This state is the same as the state in FIG. 1O (11[). Therefore, if the operating switch 24 is turned upward in this state, the visor will rotate to the retracted position in the same way as described above. Therefore, when it is desired to control the posture of the visor in the forward position to the use position, it is sufficient to return the visor to a position slightly closer to the storage position than the use position, and then rotate it again to the use position.

According to the embodiment shown above, it is very easy to assemble the fixed contact board 10 and the rotor 11 that constitute the visor position detection switch SW, and the switch SW can be made smaller.

[Brief explanation of drawings]

The drawings show embodiments of the present invention, and FIG. 1 is a cross-sectional view of the main parts of an electric door mirror (driving member case 16 is omitted).
, Figure 2 is a side view of Figure 1, Figure 3 is an enlarged side view showing the main parts of Figure 2, Figure 4 is an exploded perspective view of a part of Figures 1 and 2, and Figure 5 is a stopper. 6 is an enlarged cross-sectional view taken along the line ■-■ in FIG. 2; FIG. 7 is a plan view of the rotor 11; FIG. 8 is a plan view of the fixed contact board 10;
) to (I [[) is an explanatory plan view showing the operating state of the visor position detection switch SW composed of the fixed contact board 10 and the rotor 11, and Figures 1O (1) to (11I) show the motor drive circuit. FIG. SW...Visor position detection switch!・Stay,
la・Visor support part, 2... Visor, 2a... Supporting part, 2b... Cylinder part, 2c... Bearing part, 2d...
- Drive member case support part, 3 - Visor support member, 3a
... Visor support shaft, 3b... Claw, 3d... Plane, 4. Moderation washer, 5. Coil spring, 6.
... Washer ring, 7... Gear base, 7a...
Protrusion, 7b... recess, 8... fixed gear, 8a... protrusion, 9... stopper ring, 9a... hole, 10...
・・Fixed contact base vi, (C type retaining ring), IOa・・
・Protrusion, IOb...foot, 11...rotor, 11a...
・Vertical wall, Ilb...Groove, 12...Electric motor, 13.
... Gear train, 14 ... Axis, 15 ... Rotating gear, 16
... Drive member case, 16a... Actuator,
17゜18...Fixed contact member (fixed contact piece), 20,2
0b, 2Ia21b...Sliding contact member (brush), 2
2...Terminal, 23...Battery, 24...
・Operation switch. Patent applicant: Tokai Rika Denki Seisakusho Co., Ltd. Agent
Patent attorney Maeda Ao and two others Figure 4 Castle Bowl No. 10m (I) Figure 10 (1)

Claims (1)

[Scope of Claims] 1. A predetermined portion of the visor (2) is rotatably pivoted to a visor support shaft (3a) formed at a predetermined portion of the stay (1), and a predetermined position within the visor (2) is attached. An electric motor (12) and a gear train (13) for transmitting the rotation of the electric motor (12) are disposed on the visor support shaft (
A fixed gear (8) is non-rotatably mounted on the outer periphery of the electric motor (12), one rotary gear (15) of the gear train (13) is meshed with the fixed gear (8), and the electric motor (12) is meshed with the fixed gear (8).
), a visor position detection switch (SW) is incorporated in the drive circuit of the visor (SW), and the visor (2) is rotated relative to the stay (1) between at least the use position and the storage position by the drive of the electric motor (12). In an electric door mirror in which the visor is automatically stopped between the use position and the storage position by means of a visor position detection switch, the visor position detection switch is connected to the visor support shaft (3a).
) and above the fixed gear (8), and includes a ring-shaped fixed contact board (10) having fixed contact members (17, 18) on the upper surface, and the visor support shaft (3). ) and above the fixed contact board (10), and the fixed contact member (
sliding contact members (20a, 20b) cooperating with
;21a, 21b) on the lower surface.
1), an actuator (16a) fixed to the visor (2) side is connected to the rotor (11), and as the visor (2) rotates, the rotor (11) is moved against the fixed contact board (10). An electric door mirror for an automobile, characterized in that the door mirror is rotated by the driver. 2. The fixed contact board (10) is configured as a C-shaped retaining ring, while a claw (3b) is formed on the outer periphery of the upper end of the visor support shaft (3a), and the fixed contact board (10) is configured as a C-shaped retaining ring. (3a) and the above-mentioned claw (3b)
and the fixed gear (8).