JPH049233Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an electric remote control mirror, and in particular, a mirror body is tiltably supported with respect to a mirror drive unit housing, and a mirror is provided in the drive unit. One end of the retractable rod is connected to the mirror body via a ball joint, and the retractable rod is a member provided with a screw, and is connected to the mirror body through a receiving gear and a drive screw by a motor housed in the drive section. The present invention relates to an electric remote control mirror configured to be driven back and forth.

[Prior art]

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

FIG. 4 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. 5 is a sectional view taken along line V-V 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 O 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 4, on the X-X' axis and on the Y-
Reciprocating rods 5 are provided on the Y' axis. As shown in FIG. 5, this advancing/retracting rod 5 is connected to the mirror body 3 by providing a ball 6 at its tip, which is a ball joint different from the aforementioned ball joint 2 (hereinafter referred to as the advancing/retracting rod joint). . A groove 7 in the axial direction is provided in the reciprocating rod 5, and a protrusion 8 is formed in the drive unit housing using the groove 7.
The receiving gear 9 of the final reduction stage is fitted onto the reciprocating rod 5. FIG. 6 shows the appearance of the retractable rod 5, and 5a is a male thread.
Each of the aforementioned receiving gears 9 is connected to a motor 10 (FIG. 4).
is rotated via the reduction gear group 11.

FIG. 7 is a sectional view showing a fitted state between the receiving gear 9 and the retractable rod 5, and FIG. 8 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. 9 is a side view of the torsion coil spring member, and B in the same figure is a front view.

As shown in FIG. 8, a hole 9b perpendicular to the gear shaft is provided in the boss portion 9a of the receiving gear, through which the torsion coil spring member 12 is inserted.
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. 5, 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. 6, it is difficult to waterproof the portion where it penetrates the wall of the housing.

For this reason, as shown in FIG. 5, 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 solve the above-mentioned problems, the present inventor made the above-mentioned advancing/retracting rod a cylindrical member provided with a female screw,
The driving screw is a male screw member rotated by the receiving gear, and an O-ring is interposed at the location where the cylindrical advancing/retracting rod penetrates the wall of the mirror driving unit housing. An electric remote control mirror configured to maintain airtightness and watertightness inside the housing has been created and is currently being filed separately (Utility Application No. 60-70082 (Utility Model Application No. 61-186638) (hereinafter referred to as the earlier application). ).

Next, the remote control mirror of the above-mentioned prior application will be briefly described with reference to FIGS. 10 to 12.

FIG. 10 shows a sectional view of one 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. 11 is an enlarged sectional view of the receiving gear 14 and the retractable rod 15, and FIG. 12 is an exploded perspective view thereof.

The retractable rod 15 is constructed in a cylindrical shape as shown in FIGS. 11 and 12, and has a female thread 15a on its inner circumferential surface, and a ball 6' of the retractable rod joint is fixed to 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.
It is slidably fitted to the tubular portion 14c of No. 4.

With the above structure, even if the outer circumferential surface of the advancing/retracting rod 15 is formed into a cylindrical surface, it is possible to drive forward and backward by feeding the screw with the female screw 15a provided on the inner circumference thereof. That is, when the receiving gear 14 is rotated, the external thread 14 connected integrally with the receiving gear 14 rotates.
d rotates, and the female screw 15a screwed into the male screw 14d is screw-fed to move 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 where
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 inventor of the present invention confirmed the above-mentioned effects of the electric remote control mirror of the previous application, and after further conducting practical tests and mass production research, discovered that the following difficulties existed.

That is, when attempting to assemble the components shown in FIG. 11, the cylindrical advancing/retracting rod 15 is screwed into the male screw 14d provided on the tubular portion 14c of the receiving gear 14 while turning, and then twisted to a predetermined position. This task is not easily automated (not economically viable, if not impossible).
When assembling with automated equipment, it is desirable that the assembly be possible with simple operations, such as aligning the centers and pushing the parts together.

In view of the above circumstances, the present invention has been developed by improving the invention of the earlier application without impairing its merits, and can be assembled with simple operations such as "centering and pushing". The aim is to provide an electric remote control mirror.

[Means for solving problems]

In order to achieve the above object, the present invention uses the electrically operated remote control mirror according to the invention of the earlier application as a base body, and an O-ring is fitted on the outside of the cylindrical advancing/retracting rod with a female thread on the inside to make it airtight and watertight. This system utilizes the structure that achieves the same function as it is, and also configures the final stage receiving gear and the male threaded member separately in the electric remote control mirror of the earlier application to transmit rotational force to each member. A flexible engagement portion 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 allows the thread of the male thread to be shaped into the cylindrical shape. By pressing against the female thread on the inner circumference of the retractable rod, and due to the elasticity of the arm, it is possible to push and pull out the thread without necessarily screwing into the female thread due to the bending of the arm. It is characterized by being configured so that it can be generated and removed from the system.

[Effect]

With the above configuration, 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, and is pushed in. At the same time, the male screw member engages with the final stage receiving gear and is assembled.

〔Example〕

FIG. 1 shows one embodiment of the present invention, and is a diagram corresponding to FIG. 10 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. 10 to 12 indicate the same or similar components as in the apparatus of the prior application.

As is clear from a comparison between Fig. 12 (prior application) and Fig. 2 (present invention), this embodiment has a structure in which the receiving gear 14 in the previous application is disassembled into two, and does not have a male threaded part. The receiving gear 14' and the male screw member 31 are constructed separately.

14a is a tooth of a receiving gear 14', and 14b' is a cylindrical portion. A notch 1 for engagement is provided at the end edge of the cylindrical portion 14b'.
4f is provided.

On the other hand, the male screw member 31 has the above-mentioned notch 14f.
A protrusion 31a that engages with is provided. The male screw member 3
At the tip of the forked arm 31b provided in 1, there is a male screw thread 31c divided in the circumferential direction.
form. 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 forked space in the direction of arrow 1. Reference numeral 32a denotes an engagement protrusion that engages with the engagement hole 31d of the male threaded member 31 to prevent it from coming off. 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 unit 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 projection 31a of the male threaded member is inserted into the cylindrical portion 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.

The U-shaped leaf spring 32 of the embodiment shown in FIG.
It can also be constructed as a U-shaped leaf spring 33 shown in FIG. In this example, a tongue piece 33a is cut and raised instead of a protrusion for preventing slipping off.

[Effect of idea]

As described in detail above, the electric remote control mirror of the present invention can be assembled by applying an extremely simple operation force, and is thus suitable for automating the assembly process.

[Brief explanation of the drawing]

1 and 2 show one embodiment of the present invention,
FIG. 1 is a sectional view, and FIG. 2 is an exploded perspective view. FIG. 3 is a perspective view of a U-shaped leaf spring in a different embodiment from the above. 4 to 9 show an example of a known electric remote control mirror, FIG. 4 is a partially cutaway front view of the drive unit, FIG. 5 is a sectional view taken along line V-V in FIG. 4, and FIG. Figure 7 is an external view of the advancing and retracting rod.
The figure is a cross-sectional view of the driving member, FIG. 8 is an external view of the receiving gear, and FIG. 9 is a torsion coil spring member. Figure A is a side view and Figure B is a front view. FIG. 10 to FIG. 12 are explanatory views of the electric remote control mirror according to the prior application. 1, 1'... Drive unit housing, 1a... Circular through hole, 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'...
Ball of advancing/retracting rod joint, 7...Groove in axial direction, 8...Protrusion, 9...Receiver gear, 10...Motor, 12...Torsional coil spring member, 13...Waterproof cover, 1
4, 14'...Receiving gear, 14a...Gear tooth, 1
4b...Cylindrical boss, 14c...Tubular part, 14
d...Male thread, 14e...Split groove, 14f...Engagement notch, 15...Advancing/retracting rod, 15a...Female thread, 15b...Protrusion, 16...Receive gear shaft, 21...
...O-ring, 31...Male thread member, 31a...Engagement protrusion, 31b...Forked arm, 31c...Male thread thread, 31d...Engagement hole, 32, 33...
... U-shaped leaf spring, 32a ... Embossed protrusion, 32
b...Concavity on the back side of the ejection protrusion, 33a...Cut-up tongue piece.

Claims (1)

[Scope of utility model registration request] A mirror body is tiltably supported with respect to a mirror drive unit housing, and one end of a female threaded cylindrical advancing/retracting rod provided on the drive unit is connected to the mirror body via a ball joint. An O-ring is interposed at the point where the cylindrical advancing/retracting rod passes through the mirror drive unit housing to maintain airtightness and watertightness within the mirror drive unit housing, and a reduction gear group is operated by a motor housed in the drive unit housing. An electric remote control mirror in which a male threaded member driven through the thread is screwed into a female thread provided on the inner periphery of the cylindrical reciprocating rod, the final stage receiving gear of the reduction gear group and the male threaded member. A system for transmitting rotational force to each member by constructing them separately and providing a removable engagement part, and the thread of the male screw is divided in the circumferential direction and supported by a flexible arm. As a structure,
so that the elasticity of the arm presses the thread of the male screw against the female screw on the inner periphery of the cylindrical retractable rod;
Moreover, the electric remote control mirror is characterized in that the arm is configured to be able to be disengaged from the female screw by the elasticity of the arm.