JPH0437797Y2 - - 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 FIG. 4, advancing and retracting rods 5 are provided on the X-X' axis and the Y-Y' axis, respectively. This advancing and retreating rod 5
is connected to the mirror body 3 by providing a ball joint 6 at its tip as shown in FIG. A groove 7 in the axial direction is provided in the advancing/retracting rod 5, and this groove 7 is engaged with a protrusion 8 provided on the drive unit housing to lock the rotating shaft, and the receiving gear 9 of the final reduction stage is moved in the advancing/retracting direction. It is fitted onto the rod 5. Figure 6 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. 4) via a group of reduction gears 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, this portion requires waterproofing means. 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 eliminate the above-mentioned problems, the present inventor made the above-mentioned retractable rod a cylindrical member provided with a female screw,
The drive screw is a male screw member rotated by the receiving gear, and an O-ring is interposed at the location where the cylindrical advancing/retreating rod penetrates the wall of the mirror drive unit housing. A separate application has been filed (Utility Application No. 60-70082 (Utility Model Application No. 61-186638)) to create an electric remote control mirror configured to maintain airtightness and watertightness inside the housing. ).

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 reciprocating rod 15 has a cylindrical shape as shown in FIGS. 11 and 12, has a female thread 15a on its inner peripheral surface, and has a ball 6' of a ball joint 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 14b is provided to be screwed into the male screw 14b, and a vertical groove 14e is provided to divide the male screw 14d in the circumferential direction.

As shown in FIG. 11, 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 structure described above, even if the outer circumferential surface of the advancing/retracting rod 15 is formed into a cylindrical surface, the female thread 15a provided on the inner circumference allows forward and backward movement by feeding the screw. 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.

By utilizing the fact that the outer circumferential surface of the advancing/retracting rod 15 is formed into a cylindrical surface as described above, as shown in FIG.
An O-ring 21 is interposed at a location where the advancing/retracting rod 15 passes through a circular through hole 1a provided in the drive unit housing 1. With this configuration, it is compact, lightweight,
The inexpensive O-ring ensures airtightness and watertightness within the drive unit housing 1, 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 further conducted practical tests and research into mass production, and found the following problems.

That is, in order to turn the receiving gear 14 shown in FIG. 11 to turn the male screw 14d and feed the female screw 15a, the forward and backward lever 1 provided on the female screw 15a must be rotated.
It is necessary to lock the rotation around the axis without interfering with the forward and backward movement (movement in the axial direction) of the lever 5. However, as with the advance/retreat rod 15 mentioned above, a female thread is provided on the inner circumferential surface, and the outer circumference is It is not easy to lock the rotation of a member that allows the O-ring to slide against the cylindrical surface while allowing the member to move forward and backward. In particular, it is difficult to lock the rotation without the risk of touching and damaging the O-ring.

The present invention was developed in view of the above-mentioned circumstances.(a) It allows the forward and backward movement of the advancing and retracting rod without the risk of damaging the waterproof O-ring, while locking rotation around its axis. (b) Another object of the present invention is to provide an electrically operated remote control mirror that can prevent minute vibrations (so-called shakes) of the mirror body caused by tilting operations of the mirror body.

[Means for solving problems]

In order to achieve the above object, the present invention uses the device of the earlier application as a base, and the outer surface of the drive housing (specifically, the surface facing the mirror body).
erect at least one pair of guide pillars, and
A projection is provided on the cylindrical retractable rod, the projection is slidably fitted to the pair of guide columns, and a pin-shaped portion is fixedly provided on the mirror body, and the pin-shaped portion is fixedly provided on the mirror body. It is slidably fitted into the pair of guide columns.

[Effect]

With the above configuration, the advancing/retracting rod can freely move back and forth while being guided by the guide column, and by the guide column (via the protrusion fixed to the advancing/retracting rod).
Rotation around the axis is locked.

Further, the mirror body is also supported by the guide column via the pin-shaped portion and can be tilted without causing minute vibrations, so that the reflected image reflected on the mirror is stabilized and image fluctuations due to tilting are prevented.

〔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 above embodiment. In FIGS. 1 and 2, the same drawing reference numbers as in FIGS. 10 to 12 indicate the same or similar components as in the apparatus of the earlier application.

First, the general components of the door mirror of this embodiment will be briefly described with reference to FIGS. 1 and 2.

This embodiment has a structure in which the receiving gear 14 in the previous application is disassembled into two parts, and the receiving gear 1 does not have a male threaded portion.
4' and the male screw member 31 are constructed separately.

14a' is a tooth of the receiving gear 14, and 14b' is a cylindrical portion. An engaging notch is provided at the end edge of the cylindrical portion 14b.

On the other hand, the male screw member 31 is provided with a protrusion that engages with the aforementioned notch.

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.

As shown in FIG. 2, the guide column 1b has two guide columns 1 _b-1 and 1 _b-2 erected in parallel to each other in the drive unit housing 1'.

FIG. 3 shows a state in which one of the two advancing/retracting rods 15 shown in FIG. 2 is extracted.

A projection 15b is formed by a pair of guide pillars 1 _b-1 and 1 _b-2.
Since it is slidably held in place, the advancing/retracting rod 15 is allowed to move back and forth in the axial direction, but is prevented from rotating around the axial center. As can be easily understood from FIGS. 1 and 2, the rotation locking component (guide column 1
b and protrusion 15b) do not interfere with O-ring 21,
Therefore, there is no risk of damaging it.

As shown in FIG. 2, a pin-shaped portion 3p is integrally connected to the mirror body 3, and as shown in FIG. 1, the pin 3p is made to correspond to the guide column 1b.

In this example, three pairs of guide columns 1b and three pins 3p are provided. As the mirror body 3 tilts, the relative position of both changes, but no matter how the mirror body 3 tilts, at least one pin 3p is always guided by the guide column 1b, which prevents the mirror body 3 from shaking. (minor vibration) is prevented.

[Effect of idea]

As explained above, when the present invention is applied, (a) it is possible to lock the rotation about the axis while allowing the forward and backward movement of the advancing and retracting rod without the risk of damaging the waterproof O-ring; (b) In addition, it has an excellent practical effect of being able to prevent minute vibrations (so-called shakes) of the mirror body caused by the tilting operation of the mirror body.

[Brief explanation of the drawing]

1 and 2 show one embodiment of the present invention,
FIG. 1 is a sectional view, and FIGS. 2 and 3 are exploded perspective views. 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, and FIG. 5 is the − of FIG. 4.
6 is an external view of the reciprocating rod, FIG. 7 is a sectional view of the driving member, FIG. 8 is an external view of the receiving gear, FIG. 9 is a torsion coil spring member, and FIG. 6 is a side view. Figure B is a front view. Figures 10 to 12
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, 3p... Pin-shaped part,
5... Reciprocating rod, 6... Ball joint, 7... Axial groove, 8... Protrusion, 10... Motor, 12... Torsion coil spring member, 13... Waterproof cover, 14,
14'...Receiving gear, 14a...Gear teeth, 14b
...Cylindrical boss, 14c...Tubular part, 14d...
...Male thread, 15...Advancing/retracting rod, 15a...Female thread,
15b...Protrusion, 16...Received gear shaft, 21...O
Ring, 31... Male screw member.

Claims (1)

[Scope of utility model registration request] The mirror body is tiltably supported with respect to the 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 advancing/retracting rod passes through the mirror drive housing to maintain airtightness and watertightness within the mirror drive housing, and a motor housed in the drive housing allows the motor to pass through the reduction gear group. In the electric remote control mirror, in which a male screw member driven by a screw is screwed into a female screw provided on the inner periphery of the cylindrical advancement/retraction rod, at least one pair of guide columns are erected on the outer surface of the drive housing. At the same time, a protrusion is provided on the cylindrical retractable rod, and the protrusion is slidably fitted to the pair of guide columns, and a pin-shaped portion is fixedly provided on the mirror body, and the pin-shaped portion is fixedly provided on the mirror body. An electric remote control mirror characterized in that the shaped portion is slidably fitted to the pair of guide columns.