JPH0414283Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The present invention relates to an electric remote control mirror, and in particular, to a housing of a drive unit for tilting the mirror (hereinafter referred to as the drive unit housing). The mirror body is tiltably supported, and one end of a retractable rod provided in the drive section is connected to the mirror body via a retractable rod joint,
In addition, the reciprocating rod is a member provided with a screw, and is driven reciprocatingly by a motor housed in a drive unit via a plurality of gears (hereinafter referred to as a gear group) and a drive screw that constitute a speed reduction device. This invention relates to an electric remote control mirror configured as follows.

[Conventional technology]

FIGS. 5 and 6 show known examples of this type of electric remote control mirror.

FIG. 5 shows the drive unit with the mirror body removed, and is a front view with a portion of the drive unit housing 1 cut away. FIG. 6 is a cross-sectional view with the mirror body attached.

Two orthogonal axes X-X' and Y-Y' are set, and a ball joint 2 is provided at the intersection 0 of the two axes, and the mirror body 3 is tiltably supported by the ball joint 2 as shown in FIG. 4 is the mirror body.

As shown in Figure 5, on the X-X' axis and on the Y-
Reciprocating rods 5 are provided on the Y' axis. As shown in FIG. 6, the retractable rod 5 is connected to the mirror body 3 by providing a retractable rod joint 6 in the form of a ball joint at its tip. A groove 7 in the axial direction is provided in the reciprocating rod 5, and this groove 7 is engaged with a protrusion 8 provided on the drive unit housing to lock the rotation, and the gear group 11 shown in FIG. A received gear 9 (hereinafter simply referred to as a received gear for the sake of clarity) of the final reduction stage among a plurality of reduction stages is fitted onto the forward/retractable rod 5. Figure 7 shows the appearance of the advancing and retracting rod 5,
5a is a male screw. The receiving gears 9 are each rotated by a motor 10 (FIG. 5) via a group of reduction gears 11.

FIG. 8 is a sectional view showing a fitted state between the receiving gear 9 and the retractable rod 5, and FIG. 9 is an external view of the receiving gear 9.

As mentioned above, the forward/retractable rod 5 is prevented from rotating around its axis, and since the male thread provided on its outer periphery is screwed into the receiving gear 9, the advancing/retracting rod 5 rotates as the receiving gear 9 rotates. is driven in the axial direction to tilt the mirror body.

The female thread to be screwed into the male thread provided on the reciprocating rod 5 is constituted by a torsion coil spring member 12 as shown in FIG. A in FIG. 10 is a side view of the torsion coil spring member, and B in the same figure is a front view.

As shown in FIG. 9, a hole 9b perpendicular to the gear shaft is provided in the boss portion 9a of the receiving gear, and a torsion coil spring member 12 is inserted through the hole 9b.
The male screw of the retractable rod 5 is held between the screws. The reason why the female thread is formed by the spring member is that when an excessive force is applied, the torsion coil spring member 12 is elastically deformed and releases the excessive force.

In the configuration of the above-mentioned known example, as shown in FIG. 6, since the advancing/retracting rod 5 penetrates the wall of the drive unit housing 1, a waterproof means is required in this portion. However, since the reciprocating rod 5 is provided with a male thread 5a as shown in FIG. 7, it is difficult to waterproof the portion where it penetrates the wall of the housing.

For this reason, as shown in FIG. 6, the penetrating portion is covered with a waterproof cover 13 made of rubber.

The above-mentioned waterproof means (waterproof cover 13) requires a large number of man-hours to install and is not easy to assemble.

In order to eliminate the above problems, the inventor of the present invention
``The reciprocating rod is a cylindrical member equipped with a female screw, and the drive screw is the receiving gear (in detail,
A male threaded member is rotated by a receiving gear in the final stage of a plurality of reduction stages, and an O-ring is interposed at the location where the cylindrical advancing/retracting rod penetrates the wall of the mirror drive unit housing. A separate application is currently being filed (Utility Application No. 1982-70082) for an electric remote control mirror configured to maintain airtightness and watertightness within the mirror drive housing (hereinafter referred to as the "prior application").

Next, the remote control mirror of the above-mentioned prior application will be briefly described with reference to FIGS. 11 to 13.

FIG. 11 shows a sectional view of an embodiment of the remote control mirror of the prior application, in which 1 is a drive housing and 2 is a ball joint. 2a is a convex spherical portion of a ball joint integrally connected to the mirror body 3, and 2b is a spherical seat of the ball joint fixed to the housing 1.

14 is a receiving gear constructed by applying the invention of the earlier application;
15 is also a forward and backward rod.

FIG. 12 is an enlarged sectional view of the receiving gear 14 and the retractable rod 15, and FIG. 13 is an exploded perspective view.

The retractable rod 15 is formed into a cylindrical shape as shown in FIGS. 12 and 13, and has a female thread 15a on its inner peripheral surface and a ball 6' of the retractable rod joint at its tip.

The receiving gear 14 has teeth 1 at one end of a cylindrical boss 14b.
4a, the cylindrical boss 14b is slidably fitted to the retractable rod 15. The reciprocating rod 15 has a structure in which rotation is locked by an appropriate method.

A tubular portion 14c is provided concentrically within the cylindrical boss 14b, and the tubular portion 14c is integrally connected to the cylindrical boss 14b.

The female thread 15 is attached to the tip of the tubular portion 14c.
A male screw 14d is provided to be screwed into the male screw 14d, and a vertical groove 14e is provided to divide the male screw 14d in the circumferential direction.

As shown in FIG. 12, a receiving gear shaft 16 is installed on the inner surface of the drive unit housing 1, and this shaft
It is slidably fitted to the tubular portion 14c of No. 4.

With the above configuration, even if the outer circumferential surface of the advancing/retracting rod 15 is formed into a cylindrical surface, forward and backward driving is possible by screw feeding with the female screw 15a provided on the inner circumference. That is, when the receiving gear 14 is rotated, the external thread 14d connected integrally with the receiving gear 14 is rotated.
rotates and feeds the female screw 15a that is engaged with the male screw 14d, thereby moving the advancing/retracting rod 15 forward and backward.

Utilizing the fact that the outer circumferential surface of the advancing/retracting rod 15 is formed into a cylindrical surface as described above, the advancing/retracting rod 15 passes through the circular through hole 1a provided in the drive unit housing 1, as shown in FIG. O-ring 2 in place
Interpose 1. With this configuration, the drive unit housing 1 can be fixed by the small, lightweight, and inexpensive O-ring.
It ensures airtightness and watertightness inside, and is easy to assemble, requiring less man-hours.

[Problem that the invention attempts to solve]

The present inventor confirmed the above-mentioned effects of the electric remote control mirror of the earlier application, and while conducting practical tests, researched the automation of the assembly process in industrial production of the electric remote control mirror of the earlier application. After doing so, it was discovered that there was a problem as described below.

() When attempting to assemble the components shown in FIG. 12, the cylindrical advancement/retraction rod 15 is screwed into the male screw 14d provided on the tubular portion 14c of the receiving gear 14, and then twisted to a predetermined position. This process is not easy to automate (although it is not impossible, it is not economically viable).To perform assembly using automated equipment, for example, alignment and It is desirable to be able to assemble it with a simple operation, like pushing it in.

() Although the O-ring 21 exhibits an excellent waterproof effect, it generates large frictional resistance.

() Ball joint 2 in the example shown in Figure 11
is a spherical seat 2b provided in the drive unit housing;
A hollow convex spherical portion 2a provided in the mirror body 3;
A hemispherical member 2c that slides on the inner surface of the hollow convex spherical portion, and a headed central shaft 2d that passes through the hemispherical member, the spherical seat, and the drive unit housing wall.
and a nut 2e screwed onto the tip of the central shaft (the part that protrudes through the housing wall), and the head 2d- of the headed central shaft.
A coil spring 2f is compressed and interposed between the hemispherical member ₁ and the hemispherical member 2c. Such a ball joint 2
If you try to assemble it, you will definitely need some help. In other words, it is difficult to automate the work of screwing the nut 2e onto the headed shaft 2d, and the operation of applying a certain mounting load to the coil spring 2f requires measurement and manual adjustment. 2 is very difficult to assemble automatically.
Therefore, even if the waterproof structure (configuration shown in FIG. 12) can be easily assembled by applying the invention of the prior application, full automation of assembly of the electric remote control mirror as a whole is hindered.

This idea was created in view of the above circumstances.
Improvements have been made to the electric remote control mirror (Figs. 11 to 13) devised in the earlier application, and (a) it is possible to assemble the drive unit that tilts the mirror with simple operations such as "aligning and pushing". (b) It is possible to significantly reduce the frictional resistance caused by the seal member while maintaining complete waterproofness, and (c) it is suitable for automated assembly, including the ball joint part, and is easy to install with a coil spring. The present invention aims to provide an electric remote control mirror that can automatically and accurately regulate the load.

[Means for solving problems]

In order to achieve the above object, the present invention supports the device of the prior application (namely, the housing of the drive unit for tilting the mirror, so that the mirror body can be tilted via a ball joint, and the drive unit One end of the provided female threaded cylindrical advancing/retracting rod is connected to the mirror body via the advancing/retracting rod joint, and an O-ring is interposed at the location where the cylindrical advancing/retracting rod passes through the mirror drive unit housing. A female screw having a structure that maintains airtightness and watertightness inside the mirror drive unit housing, and a male screw member provided on the inner periphery of the cylindrical advancement/retraction rod, which is driven by a motor housed in the drive unit housing via a group of reduction gears. (a) separate the receiving gear of the final stage of the plurality of reduction stages constituted by the reduction gear group and the male screw member; A removable engaging portion configured to transmit rotational force to each member is provided, and
The male thread has a structure in which the thread is divided in the circumferential direction and supported by a flexible arm, and the elasticity of the arm presses the thread of the male thread against the female thread on the inner periphery of the cylindrical retractable rod. Moreover, the elasticity of the arm allows the arm to be engaged with and disengaged from the female screw, and b. a washer-like member that supports the thrust of the ring and slides in the rotational direction relative to the receiving gear; A spherical seat provided in the housing, a hollow convex spherical part provided in the mirror body, a hemispherical member slidingly in contact with the inner surface of the hollow convex spherical part, and a headed part that passes through the hemispherical member and the spherical seat. a central shaft, and a stepped shaft-like small diameter part is provided on the opposite side of the head of the headed central shaft, and a male thread is provided in the small diameter part, and a nut-shaped part is provided on the male thread. A spring receiving member is screwed together, a coil spring is compressed and interposed between the spring receiving member and the drive unit housing, and rotation of the spring receiving member with respect to the drive unit housing is locked. do.

[Effect]

With the above configuration, (a) When the male threaded member is pushed into the inside of the cylindrical retractable rod, the divided threaded part of the male threaded member is pushed over the female threaded part by the bending of the arm. At the same time, the male screw member engages with the final stage receiving gear and is assembled.

(b) By sliding on the receiving gear, the washer-like member also functions as a thrust bearing and reduces friction, and the washer-like member closely contacts the receiving gear and functions as a mechanical seal. Maintains airtight, watertight integrity.

(c) When assembling the ball joint part that supports the mirror body, the headed central shaft (with a male thread at the tip) can be pressed against the nut-shaped spring bearing member without any special holding means. Assembly is performed simply by turning the coil spring, and a fixed installation load is automatically applied to the coil spring.

〔Example〕

FIG. 1 shows an embodiment of the present invention, and is a diagram corresponding to FIG. 11 of the device of the prior application. FIG. 2 is an exploded perspective view of the portion of the above embodiment. Figure 1,
In FIG. 2, the same drawing reference numbers as in FIGS. 11 to 13 indicate the same or similar components as in the device of the prior application.

As is clear from a comparison between Fig. 13 (prior application) and Fig. 2 (present invention), this embodiment has a structure in which the receiving gear 14 in the previous application is divided into two, and does not have a male threaded portion. The receiving gear 14' and the male screw member 31 are constructed separately.

14a is a tooth of the receiving gear 14, and 14b' is a cylindrical portion. A notch 14 for engagement is formed on the edge of the cylindrical portion 14b'.
Provide f.

On the other hand, the male screw member 31 is provided with a protrusion 31a that engages with the notch 14f. The male screw member 31
A male screw thread 31c divided in the circumferential direction is formed at the distal end of the forked arm 31b. Each screw thread 31c in this example is divided into approximately 1/6 of the entire circumference. Therefore, two 1/6 screw threads face each other in the circumferential direction, and the remaining 4/6 has a notched shape.

In order to back up the elasticity of the arm 31b, a U-shaped leaf spring 32 is inserted into the gap of the forked arm 31b in the direction of arrow 1. 32a is a protrusion for engagement, which is inserted into the engagement hole 31d of the male screw member 31.
It engages with the pin and acts as a retainer. 32b is a recess on the back side of the above-mentioned punched-out projection.

15b provided on the cylindrical advancing/retracting rod 15 is a protrusion, and as shown in FIG.
It engages with the guide column 1b connected to the guide column 1b to lock the rotation of the advancing/retracting rod 15.

When assembling the electric remote control mirror configured as described above, before the assembly is completed as shown in FIG. 1, the back cover 1c of the drive housing 1' is not assembled.
Push the male screw member 31 in the direction of arrow P. Then (see FIG. 2), due to the bending of the forked arm 31b, the thread 31c of the male thread is inserted over the female thread 15a of the cylindrical reciprocating rod, and the U-shaped leaf spring 3 is inserted.
They are screwed together by the elasticity of 2. At the same time, the protrusion 31a of the male screw member is inserted into the cylindrical shape 14 of the receiving gear 14'.
It engages with the engagement notch 14f provided at b' so that rotational force is transmitted. In this way, assembly can be performed by alignment and pushing operations without screwing, so it is easy to automate this operation.

FIG. 3 shows an enlarged detail of the part shown in FIG. 1, and corresponds to FIG. 12 in the apparatus of the earlier application. In FIG. 3, the same drawing reference numbers as in FIG. 12 are given to the same or similar components as in the device of the prior application.

A washer 39 is configured to rotatably fit into the receiving gear 14', and the receiving gear 14' and the O-ring 2 are connected to each other.
1, the above-mentioned washer 39 is interposed between the two.

The washer 39 is pressed against the receiving gear 14' by the elastic restoring force of the O-ring 21, and rotates relative to the receiving gear 14' while maintaining airtightness and watertightness.

With this configuration, when the receiving gear 14' rotates, the washer 39 remains stationary with respect to the housing 1 and does not change its relative position with respect to the O-ring 21, so that the washer 39 is prevented from changing its position relative to the O-ring 21 by the frictional force of the O-ring 21. There is no risk that the rotation of the receiving gear 14' will be hindered.

An exploded perspective view of the vicinity of the part shown in FIG. 1 is shown in FIG. Hemispherical member 2c and spherical seat 2 shown in FIG.
A small-diameter male screw 2d- ₃ is integrally connected to the tip of the central shaft 2d with a head that protrudes inward through the wall surface of the drive unit housing 1', and a nut-shaped spring receiver 41 is connected to the tip of the central shaft 2d. Screw on. 2d- ₁ is a head shaped like a bolt head, and 2d- ₂ is a cylindrical part. The spring receiver 41 is positioned in contact with the stepped portion 2d- ₄ at the lower end of the cylindrical portion 2d- ₂ . The coil spring 2f is compressed between the spring receiver 41 and the wall of the drive unit housing 1'. intervene. As a result, the central shaft 2d is urged downward,
The convex spherical portion 2a is connected to the spherical seat 2b via the hemispherical member 2c.
to press against.

The nut-shaped spring receiver 41 is formed into a square nut shape, and a square-shaped guide tube 1 that is loosely fitted into the square nut-shaped spring receiver 41 is provided in the drive unit housing 1'.
b are installed consecutively. As a result, the nut-shaped spring receiver 41
is rotation relative to the drive unit housing 1' (center axis 2
(rotation around d) is locked, and sliding in the axial direction of the central shaft 2d is permitted.

When assembling this ball joint part, as shown in Fig. 1, insert the central shaft 2d into the coil spring 2.
f is externally fitted onto the central axis 2d. On the other hand, the nut-shaped spring receiver 41 is fitted into the guide tube 1b and covered with the back cover 1c of the drive unit housing 1. In this state, the central axis 2d
The nut-shaped spring receiver 41 and the nut-shaped spring receiver 41 are automatically aligned, so when the center shaft 2d is pressed and turned in the direction of arrow D, the nut-shaped spring receiver 41 and the male screw 2d- ₃ are aligned.
are screwed together and tightened. As described above, the remote control mirror of this embodiment is easy to assemble automatically because it can be assembled by simple operations, and the spring receiver 41 is automatically positioned and the installation length of the coil spring 2f is automatically regulated. .

[Effect of idea]

As detailed above, the drive unit of the electric remote control mirror of the present invention can be assembled with extremely easy and simple operations such as ``alignment and pushing'', and also has complete waterproof performance. It is possible to significantly reduce the frictional resistance caused by the seal member while maintaining the same condition, and the ball joint part that supports the Hamirar so that it can freely tilt can be easily assembled, and the mounting load of the coil spring is accurate.This has excellent practical effects. This will greatly contribute to the automation of the electric remote control mirror assembly process.

[Brief explanation of drawings]

1 to 4 show an embodiment of the present invention,
Figure 1 is a sectional view, Figure 2 is a partially exploded perspective view, and Figure 3 is a cross-sectional view.
The figure is a partially enlarged detailed view, and FIG. 4 is a partially exploded perspective view. 5 to 10 show an example of a known electric remote control mirror, FIG. 5 is a partially cutaway front view of the drive unit, and FIG. 6 is the − of FIG. 5.
7 is an external view of the advancing/retracting rod, FIG. 8 is a sectional view of the driving member, FIG. 9 is an external view of the receiving gear, and 10th
The figures show a torsion coil spring member, with Figure A being a side view and Figure B being a front view. Figures 11 to 13
The figure is an explanatory diagram of an electric remote control mirror according to a prior application. 1, 1'... Drive unit housing, 1b... Guide column, 2... Ball joint, 2a... Convex spherical part, 2b... Spherical seat, 3... Mirror body, 4... Mirror body,
5...Advancing/retracting rod, 6,6'...Advancing/retracting rod joint, 7...
Axial groove, 8... projection, 9... receiving gear, 10
... Motor, 12 ... Torsion coil spring member, 1
3... Waterproof cover, 14, 14'... Receiving gear, 1
4a...Gear tooth, 14b...Cylindrical boss, 1
4c...Tubular part, 14d...Male thread, 14e...
Split groove, 14f...notch for engagement, 15...advancing/retracting rod, 15a...female screw, 15b...protrusion, 16...
... Received gear shaft, 21 ... O-ring, 31 ... Male thread member, 31a ... Engagement protrusion, 31b ... Forked arm, 31c ... Male screw thread, 31d ... Engagement hole, 32 , 33... U-shaped leaf spring, 32a...
Embossed protrusion, 32b... recess on the back side of the embossing protrusion, 39... washer-like member.

Claims (1)

[Claims for Utility Model Registration] A mirror body is tiltably supported with respect to a housing of a drive unit that tilts the mirror, and
One end of a female-threaded cylindrical advancing/retracting rod provided on the drive section is connected to the mirror body via a advancing/retracting rod joint, and an O-ring is attached to the portion where the cylindrical advancing/retracting rod passes through the housing of the driving section. The structure is such that the inside of the housing of the drive unit is kept airtight and watertight by interposing the
An electric remote control mirror in which a male screw member driven by a motor housed in a housing of the drive unit via a group of reduction gears is screwed into a female screw provided on the inner periphery of the cylindrical advance/retreat rod, comprising: a The reduction gear group is composed of a plurality of reduction gear stages, and the receiving gear of a pair of gears constituting the final reduction gear stage and the male screw member are configured separately. A detachable engaging portion is provided for transmitting rotational force to each member, and the male screw has a structure in which the thread is divided in the circumferential direction and supported by a flexible arm. The arm is configured so that its elasticity forces the thread of the male screw against the female screw on the inner periphery of the cylindrical retractable rod, and the elasticity of the arm allows it to be engaged with and disengaged from the female screw. , b. A washer-like member is interposed between the final stage receiving gear of the reduction gear group and the O-ring, and the washer-like member supports the thrust of the O-ring and slides in the rotational direction relative to the receiving gear. c. The mirror body is tiltably supported with respect to the housing of the drive unit by a ball joint, and the ball joint is connected to a spherical seat provided on the drive unit housing and to the mirror body. A hollow convex spherical part provided, a hemispherical member slidingly touching the inner surface of the hollow convex spherical part, and a headed central shaft passing through the hemispherical member and the spherical seat, and A stepped shaft-like small diameter part is provided on the opposite side of the head of the headed central shaft, and a male screw is provided in the small diameter part, and a nut-shaped spring bearing member is screwed into the male thread, and An electric remote control mirror characterized in that a coil spring is compressed and interposed between a spring receiving member and a drive housing, and the spring receiving member is prevented from rotating with respect to the driving housing.