JPH055082Y2 - - 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 reciprocating rod is connected to the mirror body via a ball joint, and the reciprocating rod is a member provided with a screw, and is reciprocated by a motor housed in a drive unit via a receiving gear and a driving screw. The present invention relates to an electric remote control mirror configured to be driven.

[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 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 5, on the X-X' axis and on the Y-
Advance and retreat rods 5 are provided on the Y' axis. As shown in FIG. 6, this retractable rod 5 is connected to the mirror body 3 by providing a ball joint 6 at its tip. A groove 7 in the axial direction is provided in the advancing/retracting rod 5, and this shaft 7 is engaged with a protrusion 8 provided on the drive unit housing to lock rotation, and the receiving gear 9 of the final reduction stage is inserted into the advancing/retracting rod. 5 is fitted externally. FIG. 7 shows the external appearance of the retractable rod 5, and 5a is a male thread. Each of the receiving gears 9 is connected to a reduction gear group 11 by a motor 10 (FIG. 5).
It is rotated through.

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.
Clamp the male screw of the retractable rod 5 with 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 said advancing/retracting rod is a cylindrical member provided with a female thread, the said drive screw is a male threaded member rotated by the said receiver gear, and the said cylindrical advancing/retracting rod is a member of the mirror drive unit housing. ``Electric remote control mirror configured to maintain airtightness and watertightness inside the mirror drive housing by inserting an O-ring in the part that penetrates the wall'' and is currently filing a separate application (Utility Model Application No. 61-186638) (hereinafter referred to as the "first 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 reciprocating rod 15 has a cylindrical shape as shown in FIGS. 12 and 13, has a female thread 15a on its inner peripheral surface, and has a ball 6' of a ball joint secured 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. 12, a receiving gear shaft 16 is installed on the inner surface of the drive unit housing 1, and this shaft is
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, 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 a 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 on the electric remote control mirror of the previous application, and after conducting further practical tests and continuing research, it was discovered that the mirror had the following defects.

(i) When assembling the components shown in FIG. 12, the cylindrical advancement/retraction rod 15 is screwed into the male screw 14d provided in the tubular portion 14c of the receiving gear 14 while rotating until it reaches a predetermined position. It requires screwing in, and this work is not easy to automate (it is not economically viable, if not impossible).To perform assembly with automated equipment,
For example, it is desirable to be able to assemble it with a simple operation, such as aligning the center and pushing it in.

(ii) In the configuration related to the prior application shown in Figure 12,
The O-ring 21 connects the drive unit housing 1 and the receiving gear 1.
4, and is stationary in the left-right direction in the figure. Therefore, when the advancing/retracting lever 15 moves in the left-right direction in the figure, the contact position of the advancing/retracting lever 15 with respect to the O-ring 21 changes.

It is good when the advancing/retracting rod 15 moves forward to the right from the illustrated position, but when it retreats to the left from the illustrated position, the advancing/retracting lever 15 tends to vibrate.
The reason for this is presumed to be that the reciprocating rod 15 changes from being supported at both ends to being nearly cantilevered.

This idea was created in view of the above circumstances.
The electric remote control mirror (Figs. 11 to 13) according to the invention of the previous application has been improved, (a) the advancing and retracting rods are waterproof without the risk of vibration, and (b) simple work is possible. It is an object of the present invention to provide an electric remote control mirror in which a mirror tilting drive unit can be assembled.

[Means for Solving the Problems] In order to achieve the above object, the present invention provides the device of the earlier application (i.e., supports the mirror body in a tiltable manner via a ball joint with respect to the mirror drive unit housing, and , one end of a female-threaded cylindrical advancement/retraction rod provided on the drive unit is connected to the mirror body via a ball joint, and an O-ring is installed at the location where the cylindrical advancement/retraction rod passes through the mirror drive unit housing. The interior of the cylindrical reciprocating rod is interposed with a male screw member driven by a motor housed in the drive housing through a group of reduction gears. electric remote control mirror screwed onto a female screw provided in the
As a base, a. The final stage receiving gear of the reduction gear group and the male threaded member are configured separately, and a removable engagement portion is provided for transmitting rotational force to each member, 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. Furthermore, the elasticity of the arm allows the arm to be engaged with and disengaged from the female screw, and (b) the arm is configured such that it can be engaged with and disengaged from the female screw, and b. Constructing a cylindrical member that fits loosely, the cylindrical member being integrally connected to the mirror drive unit housing, and c. Near the opposite end of the retractable rod from the side connected to the mirror body. A ring groove is provided in the ring groove, and an O-ring is fitted onto the ring groove so that the outer periphery of the O-ring slides against the inner circumferential surface of the cylindrical member.

[Effect]

With the above configuration, (i) When the male threaded member is pushed into the inside of the cylindrical reciprocating 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.

(ii) Since the O-ring is fitted into the O-ring groove at the rear end of the retractable rod, it moves forward and backward together with the retractable rod and is always in contact with the rear end of the retractable rod. For this reason, the advancing/retracting rod is always supported on both sides (regardless of its forward and backward positions), and there is no risk of vibration. In addition, the above O-ring does not slide against the advancing/retracting rod and slides against the housing cylindrical portion, which is a stationary member, without sliding against the receiving gear, which is a rotating member, so that the operation is smooth. .

〔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 apparatus of the prior application.

As is clear from a comparison of Figure 13 (prior application) with Figure 2 (present invention), in this embodiment, the receiver gear 14 in the prior application is divided into two, and the receiver gear 14', which does not have a male thread portion, and the male thread 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 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 in the direction of arrow I into the gap of the forked arm 31b. 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 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.

FIG. 3 shows an enlarged detail of the portion in FIG. 1, and corresponds to FIG. 12 in the device of the earlier application. Third
In the drawings, 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 cylindrical portion 1a is provided integrally with the driving portion housing 1' and concentrically with the retracting rod 15 at a location where the retracting rod 15 passes through the driving portion housing 1'. The illustrated dimension g is the reciprocating rod 15 and the cylindrical portion 1a.
Indicates the gap between

A ring groove is provided near the rear end of the retractable rod (the end opposite the ball joint 6') and an O-ring 21 is fitted into the ring groove. This O-ring 21 slides closely against the cylindrical portion 1a to maintain watertightness.

As can be easily understood from Figures 1 and 3,
Since the reciprocating rod 15 is supported on both sides by the ball joint 6' and the O-ring 21, there is no risk of vibration.

FIG. 4 shows an exploded perspective view of the vicinity of the portion shown in FIG. 1. A small-diameter male screw 2d is attached to the tip of a headed central shaft 2d that penetrates the hemispherical member 2c and the spherical seat 2b, penetrates the wall surface of the drive unit housing 1', and is discharged inward.
- ₃ are connected in series, and a nut-shaped spring receiver 41 is screwed on.

2d- ₁ is a head shaped like a bolt head, 2d
₋₂ is a cylindrical part. The spring receiver 41 is positioned by coming into contact with the stepped portion 2d- ₄ at the lower end of the cylindrical portion 2d- ₂ .

A coil spring 2f is compressed and interposed between the spring receiver 41 and the wall of the drive unit housing 1'. 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 is (a) completely waterproof;
(b) There is no risk of vibration, (c) the forward and backward movement of the forward and backward levers is smooth, and (d) assembly is easy, which greatly contributes to the automation of assembly work.

[Brief explanation of the drawing]

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 partially exploded perspective view.
The figure is a detailed explanatory view of the part, 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 reciprocating rod, 8 is a sectional view of the driving member, 9 is an external view of the receiving gear, 1st
Figure 0 shows a torsion coil spring member, Figure A is a side view, and Figure B is a front view. Figures 11 to 1
FIG. 3 is an explanatory diagram of a known electric remote control mirror according to a prior application. 1, 1'...Drive part housing, 1a...Cylindrical part, 3...Mirror body, 4...Mirror body, 5
... Retractable rod, 6, 6' ... Ball joint, 7 ... Axial groove, 8 ... Protrusion, 9 ... Receive gear, 10 ... Motor, 12 ... Torsion coil spring member, 13 ...
Waterproof cover, 14, 14'... Receive gear, 14a...
...Gear teeth, 14b...Cylindrical boss, 14d...
...Male thread, 14e...Split groove, 14f...Engagement notch, 15...Advancing/retracting rod, 15a...Female thread, 1
5b...Protrusion, 16...Received gear shaft, 21...O-ring, 31...Male thread member, 31a...Engaging protrusion, 31b...Forked arm, 31c...Male thread thread, 31d ...Engagement hole, 32, 33...U
Letter leaf spring.

Claims (1)

[Claims for Utility Model Registration] 1. 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 in the drive unit is spherically supported with respect to the mirror body. Connected via a joint, an O-ring is interposed at the location where the cylindrical advancing/retracting rod penetrates the mirror drive unit housing to maintain airtightness and watertightness within the mirror drive unit housing;
An electric remote control mirror in which a male screw member driven by a motor housed in the drive unit housing 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 final stage receiving gear of the reduction gear group and the male screw member are configured separately, and a removable engagement portion is provided for transmitting rotational force to each member,
Moreover, 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 connected to the female thread on the inner periphery of the cylindrical retractable rod. (a) The arm is configured to be pressed against the arm and to be able to be engaged with and disengaged from the female screw by elastic deformation of the arm, and b. a cylindrical member that fits loosely into the housing, and the cylindrical member is integrally connected to the mirror drive unit housing, and c. An electric type, characterized in that a ring groove is provided near the opposite end, an O-ring is fitted onto the ring groove, and the outer periphery of the O-ring is brought into sliding contact with the inner circumferential surface of the cylindrical member. remote control mirror.