JPS6034504Y2 - Electric mirror drive device - Google Patents

Description

[Detailed description of the invention] The present invention relates to an electric mirror drive device for use in fender mirrors and other parts of automobiles.In particular, the present invention is based on the invention of Utility Application No. 131658/1983, which was previously proposed by the present inventor. This is an improved version.

In the prior invention, in order to automatically adjust the reflection angle of the mirror, a pair of operating rods are attached to the back of the mirror, and the driving force of a reversible motor is selected for these operating rods via a special latch mechanism. The mirror is set so that the angle of inclination of the mirror can be adjusted appropriately by moving the operating rod back and forth, so that the reflection angle can be adjusted back and forth and left and right by using just one motor. It's watery,
Moreover, the switching mechanism was improved so that switching between the two could be done smoothly.

The present invention is also the same in this respect, but it has been found that the prior invention has the following problems, so these have been improved.

In other words, the configuration of the prior design is as shown in Fig. 1, in which the horizontal line containing the rotation center X of the mirror M and the axis of the operating rod F that drives the mirror M are arranged in parallel, and this operating rod is oriented in the horizontal direction. The structure was such that it could only be moved to.

Therefore, when the mirror actually operates, although the pivot P at the tip of the operating rod moves in an arc with X as the center, as shown by the chain line y in Figure 1, movement along this line is permissible. I was worried that it was impossible because I hadn't been able to do it.

Furthermore, when assembling during manufacturing, the center of each pivot was not always set at the correct position, and the center could sometimes be slightly misaligned within the allowable range.

In such a case, it becomes more difficult for the tip pivot of the operating rod to move in an arc shape, and there are operational constraints such as the need for precise assembly.

In this case, the present invention improves the drawbacks of the previous invention by making the operating rod itself rotatable in the y-line direction around the base, and also improves the overall structure compared to the previous invention. The gripping mechanism of the operating rod has been improved to make it more compact and to operate smoothly and reliably even when moving the mirror manually.

Next, the present invention will be specifically explained based on the embodiments shown in FIGS. 2 to 8.

1 is a mirror, 2 is a mirror holder for holding the mirror 1, and 3 is a housing for a driving device disposed behind the mirror holder 2.

A support shaft 4 is provided protruding from the front surface of the housing 3, and a pivot 5 provided at the tip of the support shaft 4 is fitted into a spherical seat 6 formed on the back surface of the mirror holder 2. 2 is mounted so as to be movable relative to the housing 3.

The housing 3 can be divided as a whole so that a driving device can be accommodated therein, and is fixed to a mirror housing, a stay, or the like.

Inside the housing 3, a worm wheel 7a for the operating rod that adjusts the angle in the left-right direction and a worm wheel 7b for the operating rod that adjusts the angle in the vertical direction are rotatably disposed.

Namely, this warm foil? a and 7b are provided so that their axes are perpendicular to the mirror 1, and actuating rods 9a and 9b are fitted into shaft holes 8a and ab opened at their centers, respectively.

Each of the operating rods 9a, 9b consists of a threaded portion 13 having a root portion 10 of the following configuration, and an adjusting nut 17a or 17b with a pivot □ that engages with this threaded portion.

By the way, as shown in FIG. 6, the root portions of the operating rods 9a and 9b have a curved side surface 11, and, for example, protrusions 12, 12 for preventing rotation are formed on the diameter line thereof. A threaded portion 13 is provided on the upper surface of the root portion (on the right side in the figure).

On the other hand, a hemispherical bearing portion 14 is formed on the lower surface of the root portion 10, and the root portion 10 of the operating rod is slid onto one end of the inner surface of the worm wheel 7b as shown in FIGS. 4 and 8. Insert freely.

FIG. 8 shows the shape of the worm foil 7b when viewed from the left side in FIG. 4, and as is clear from the figure,
A sliding surface 15 having a curved surface corresponding to the curved surface 11 is formed on the inner side of the end surface of the worm foil, and a recess 16° 16 corresponding to the projections 12, 12 is formed on this sliding surface. There is.

By fitting the protrusion into the recess 16, when the worm wheel 7b rotates, the threaded portion 13 of the operating rod 9b can also rotate accordingly.

On the other hand, a curved surface 11 formed at the root portion 10 of the operating rod is slidably fitted onto the sliding surface 15, so that the operating rod can move along its axis as shown by the chain line in FIG. Even if it swings in a conical direction about the center (that is, even if it swings in the direction of the generatrix of a cone with the center point Q of the root portion 10 as its apex), the movement is allowed.

Next, an adjustment nut 17 with a pivot is attached so as to engage the threaded portion 13 of the operating rod.
A and 17b will be explained.

This device is made of flexible synthetic resin, for example, and has a pivot 18 at the tip, as shown in enlarged form in FIGS. It is divided into 19 claws at the tip.

As shown in the figure, each groove 19 engages with the valley of the threaded portion 13 of the operating rod, and when the threaded portion 13 rotates, the entire adjustment nut 17b moves up and down (parallel to the axis).
It is configured to move horizontally (in the figure).

Incidentally, the adjusting nut may have four pawls 19, each having 900 pawls, provided at equal intervals.

The tips of the adjusting nuts 17a and 17b are made to protrude to the outside of the housing 3, and a pivot 18 provided at the tips is fitted into a spherical seat 20 formed on the back surface of the mirror holder 2.

In this case, a protrusion 18a is formed on the circumferential surface of the pivot 18, and by fitting this into a groove 20a formed in the spherical seat 20, the operating rods 9a, 9b can be moved up, down, left and right around the spherical seat 20. Although the head can swing freely, it is configured so that it does not rotate around its axis.

The housing 3 is provided with worm gears 21a and 21b that mesh with the worm wheels 7a and 7b.The worm gears 2tat21b are integrally formed on the inner surface of the housing 3 so that their axes are aligned on the same straight line. It is supported on a plurality of formed bearings 22.

As shown in FIG. 2, a shaft hole 23 is formed in the center of each of the worm gears 21ay 21b, and the shaft holes 23 are fitted into the engaging cylinder 2 from both end surfaces facing each other.
Attach 4.

A locking protrusion 25 as shown in the figure is formed on the outer peripheral surface of the engagement cylinder, and the worm gears 21a, 2
A notch 26 into which the protrusion fits is formed on both opposing end surfaces of 1b.

A collar 27 is mounted inside the engagement cylinder 24, and an output shaft 29 of a reversible motor 28 mounted on an extension of the axis of the worm gear is connected via this collar.

The collar transmits the rotation of the output shaft 29 to the engagement tube 24, and even if the engagement tube slides in the axial direction by the electromagnetic plunger described later, the rotation of the motor is not transmitted to the engagement tube. is configured to do so.

An inwardly directed protrusion 30 is provided on the end surface of the engagement cylinder 23,
The neck 32 of the plunger rod 31 engages with this flange.

A spring indicated by reference numeral 33 is a spring that is compressed between the neck portion 32 of the plunger rod and the casing of the electromagnetic plunger 34, and causes the plunger rod to always move toward the right in FIG. Give a trend.

As clearly shown in FIGS. 2 and 5, the electromagnetic plunger 34 is provided on the axes of the worm gears 21a and 21b, and assembled so as to make the whole assembly compact.

The mirror driving device of the present invention has the configuration shown in the above embodiment, and its operation will be described below.

First, when no power is supplied to the solenoid of the electromagnetic plunger 34, the elastic force of the spring 33 causes the engaging cylinder to
3 is pushed to the right in FIG. 2, so the cylinder 23
The locking protrusion 25 formed on the right worm gear 21b
, engages with the notch 26 in .

Therefore, when the reversible motor 28 is driven and the engagement tube 23 is rotated via the collar 27, the protrusion 25 and notch 26
The worm gear 21b, which is engaged with the output shaft 29 of the motor through
starts rotating.

When the worm wheel rotates, the operating rod 9b, which is connected to the worm wheel through the engagement relationship between the recess 16 and the protrusion 12, rotates accordingly.

In such a case, the adjustment nut 17b, which is engaged with the threaded portion 13 of the operating rod through the pawl 19, is prevented from rotating by the action of the protrusion 18a provided on the pivot 18 at the tip thereof, so that the adjustment nut 17b is eventually is worm foil 7
Simultaneously with the rotation of b, it moves in the axial direction and presses (or pulls) the mirror holder 2 attached to its tip from the back side.

As a result, the mirror 1 is mounted on a pivot 5 provided at the tip of the support shaft 4.
The angle is adjusted in the vertical direction using the fulcrum as the fulcrum.

In this case, since the protrusion 25 of the engagement tube 23 is not engaged with the notch 26 of the other worm gear 21a, the operating rod 17a that adjusts the angle in the left and right direction does not operate despite the rotation of the reversible motor 28. do not.

On the other hand, when adjusting the left and right angle of mirror 1, □
The switch is operated to energize the solenoid of the electromagnetic plunger 34 and the reversible motor 28.

In this way, the plunger rod 31 disposed inside the solenoid is attracted against the elasticity of the spring 33, and as a result, the engagement tube 23 is drawn to the left in FIG. The protrusion 25 formed on the cylinder comes off from one worm gear 21b, and the other worm gear 21a
It fits into the notch 26 of.

Therefore, the rotational force of the reversible motor 28 is transferred to the worm gear 21
Since the operating rod 9a moves back and forth in the same way as in the case described above, the angle of the mirror 1 in the left and right direction is adjusted.

Incidentally, in the drive device of the present invention, if it is desired to manually adjust the angle of the mirror, it is sufficient to press the front surface of the mirror 1 with a finger.

In this way, the finger pressure will cause the claw 1 of the adjusting nut 17a or 17b to engage with the operating rod 9a or 9b.
9 is forcibly expanded from its elasticity and moves back and forth, so the angle can be adjusted manually using the tip of the support shaft 4 as a fulcrum.

As described above, according to the present invention, the driving force of the reversible motor can be selectively transmitted to a pair of actuating rods without moving the switching gear or other gears, so that when switching, the gear tooth tip Switching operations can be performed reliably without any collision between them.

In addition, since there are no moving gears, it is possible to firmly hold the worm gear and worm wheel against the housing, allowing for smooth and accurate transmission of driving force, and at the same time making the entire device more robust. can do.

Furthermore, the present invention switches and transmits the driving force simply by alternately engaging the locking protrusions provided on the engagement cylinder with the notches formed on the end face of each worm gear. Compared to conventional switching means, the structure can be simplified and miniaturized, and the cost and durability of the entire device can be far reduced.

In particular, the present invention allows the operating rod F to swing in the conical direction, whereas the previous invention was configured to allow the operating rod F to move only in the axial direction. The pivot part P located at the tip is the mirror's pivot center X
Even if the actuating rod is moved along the locus line y in Fig. 1 with the rotation center at Workability is also improved, as even if there is some deviation in the position of the mirror, it will not affect the operation of the mirror in any way.

In Someike Mizu, the mirror drive motor 28, electromagnetic plunger 31, etc. are all replaced by a worm gear 21a,
Since they are arranged on the axis of 21b, they also exhibit advantages such as making the whole compact.

[Brief explanation of the drawing]

Fig. 1 is a partially longitudinal side view showing an electric mirror drive device of the prior invention, Fig. 2 is a rear view showing an embodiment of the mirror drive device of the present invention, and Fig. 3 is a partially cutaway view of the same. 4 is a sectional view taken along line IV-IV in FIG. 2, FIG. 5 is a sectional view taken along line ■-v in FIG. 2, and FIG. 6 is a partial longitudinal section showing the relationship between the operating rod and the adjustment nut. A side view, FIG. 7 is a sectional view taken along the line ■-■ in FIG. 6, and FIG. 8 is an end view of the worm foil, and FIG. I'm being ignored. 1: Mirror, 2: Mirror holder, 3: Housing, 4
: Support shaft, 5: Pivot, 6: Spherical catch, 7a * 7b" worm foil, 8a, 8b: Shaft hole, 9 a 99 b
: Operating rod, 10: Root of operating rod, 11: Curved surface, 12
: Projection, 13: Threaded part, 14: Bearing part, 15: Sliding surface,
16: recess, 17: adjustment nut with pivot, 18: pivot, 18a: protrusion, 19: pawl, 20. : Spherical catch,
21aw21b: Worm gear, 22: Bearing, 23: Shaft hole, 24: Engagement tube, 25: Locking protrusion, 26. : Notch, 2
7: collar, 21: motor, 29: output shaft, 30: ridge, 31 nib plunger rod, 32: neck, 33 nip spring, 34: electromagnetic plunger.

Claims (1)

[Claims for Utility Model Registration] 1. The tips of a pair of operating rods that adjust the reflection angle of the mirror,
In the mirror drive device which is attached to the back of the mirror so that it can swing freely but cannot rotate, the operating rod is formed by a threaded part having a base part and an adjustment nut with a pivot that engages this threaded part. At the same time, a curved surface having a protrusion is formed at the base of each of the operating rods, and this is fitted into an arcuate sliding surface having a rotation stopper provided in the shaft hole of the worm wheel. The threaded portion of the operating rod rotates together with the worm wheel and can also swing in a conical direction, and an adjusting nut having a pawl that engages the threaded portion of the operating rod is attached to the threaded portion. The worm gears are arranged on the axis, and each of the worm wheels is engaged with a worm gear, and these worm gears are arranged in a straight line, and an engagement is provided inside each of these gears so as to be slidable in the axial direction. loosely fitting a cylinder, selectively engaging a locking protrusion formed on the outer peripheral surface of the engaging cylinder with one of the worm gears, and linking the engaging cylinder with an output shaft of a reversible motor; An electric mirror driving device characterized in that the engaging cylinder is freely reciprocated in the axial direction by a solenoid of an electromagnetic plunger. 2. A flexible adjusting nut having pawls 19 arranged at intervals of 90° or 1200 degrees from each other is provided on the axis of the threaded portion of the actuating rod, and these pawls are connected to the threaded portion of the actuating rod. An electric mirror drive device according to claim 1 of the claimed utility model registration claim, which is brought into pressure contact with the user.