JPS6039297Y2 - 2 motor type mirror drive device - Google Patents

Description

[Detailed description of the invention] The present invention relates to an electric mirror drive device used for automobile fender mirrors, etc., and particularly in a mirror drive device that automatically adjusts the reflection angle of the mirror using two motors. This is an improved pivot mechanism for the angular deflection lever.

An example of a mechanism for automatically adjusting the reflection angle of a mirror using two motors is shown in FIGS. 1 and 2, and the conventional type generally has such a structure.

That is, the central part of the back surface of the mirror 1 is attached to the mirror housing 3 via the universal joint 2, and a pair of actuating tubes 4a and 4b for adjusting the reflection angle are arranged on the back surface of the mirror, and a motor 5at5b is installed in the actuating tube. It has a structure in which male threaded rods 6a and 6b fixed to the output shaft are fitted, and a retaining pin 7 equipped with a pressing spring is engaged with the male threaded portion.

Note that the reference numeral 8 is a rotation stopper pin.

When the male threaded rods 6a*6b are rotated by the motors 5a and 5b, the actuating barrels 4a and 4b move back and forth, thus adjusting the angle of inclination of the mirror.

In the conventional device described above, the horizontal line including the rotation center X of the mirror 1 and the operating cylinder 4a or 4 that drives the mirror 1 are
Since the axes of b were arranged parallel to each other and the operating cylinder was structured so that it could only move in the horizontal direction, when the mirror actually operated, the operating rod was moved as shown by the chain line y in Figure 1. Although the pivot P at the tip moves in an arc with X as the center, movement along this line was not allowed.

As a result, the movement was strained and did not move forward or backward smoothly, and the center of each pivot was not always set at the correct position during assembly during production, and the center could sometimes shift slightly within the allowable range. .

In such a case, it becomes more difficult for the tip pivot of the actuating tube to move in an arc shape, and there are operational constraints when it is necessary to assemble the actuator precisely.

Here, in order to improve the drawbacks of the conventional type, the present invention makes it possible for the operating rod itself to rotate in the y-direction around the base, making the whole compact, and moreover, the mirror can be moved manually. The gripping mechanism of the operating rod has been improved so that it can operate smoothly and reliably when moving.

Next, the present invention will be specifically explained based on the embodiments shown in FIGS. 3 to 10.

11 is a mirror; 12 is a mirror holder for holding the mirror 11; and 13 is a housing for a driving device disposed behind the mirror holder 12.

g) A support shaft 14 is provided protruding from the front of the housing 13, and the support shaft 1
By fitting the pivot 15 provided at the tip of the mirror holder 12 into the spherical seat 16 formed on the back surface of the mirror holder 12,
The mirror 11 and mirror holder 12 are attached to the housing 13.
Install it so that it can be moved against the ground.

The housing 13 can be divided as a whole so that a driving device can be accommodated therein, and can be fixed to a mirror stay or the like.

Inside the housing 13, a worm wheel 17a for the operating rod that adjusts the angle in the left-right direction and a worm wheel 17b for the operating rod that adjusts the angle in the vertical direction are rotatably disposed.

That is, these worm wheels are provided so that their axes are perpendicular to the mirror 11, and operating rods 19a and 19b are fitted into shaft holes 18a and 18b opened at the center, respectively.

Each of the operating rods 19a and 19b has a root portion 20 having the following configuration.
It consists of a threaded portion 23 having a diameter of 1.5 mm, and an adjustment nut 27a or 27b with a pivot that engages with this threaded portion.

By the way, as shown in FIGS. 6 to 9, the root portion 20 of the operating rod has a curved side surface 21, and, for example, a protrusion 22, 22 for preventing rotation is formed on the diameter line thereof. A threaded portion 23 is provided on the upper surface (on the right side in the figure).

On the other hand, a hemispherical support shaft portion 24 is formed on the lower surface of the root portion 20, and this root portion is slidably fitted into one end portion of the inner surface of the worm foil 17b as shown in FIGS.

FIG. 9 shows the shape of the worm foil 17b when viewed from the left side in FIG. 6, and as is clear from the figure, the inner end surface of the worm foil has a curved surface corresponding to the curved surface 21. A sliding surface 25 is formed, and this sliding surface has grooves 26.2 corresponding to the protrusions 22, 22.
6 is formed.

By fitting the protrusion 22 into this groove 26, when the worm wheel 17b rotates, the threaded portion 23 of the operating rod 19b can also rotate accordingly.

That is, as clearly shown in FIGS. 6 and 7, the concave groove 26 into which the protrusion 22 fits loosely is formed on the Z-Z line in FIG. 9, which is perpendicular to the axis of the operating rod. As long as the movement is attempted within a vertical plane parallel to the Rod 19
The overall motion of b is a swinging motion as shown by the chain line in FIG.

In other words, since the curved surface 21 of the actuating rod is slidably fitted onto the sliding surface 25 formed on the inner surface of the worm wheel 17b, the actuating rod is slidably attached to the sliding surface 25 formed on the inner surface of the worm wheel 17b. Even if it swings in a conical direction about its axis (that is, swings in the generatrix direction of a cone with the center point Q of the root portion 20 as its apex), that movement is allowed.

Next, an adjustment nut 27a with a pivot is attached so as to engage the threaded portion of the operating rod;
27b will be explained.

As an example, this product is made of flexible synthetic resin, and as shown enlarged in FIGS. 8 and 10,
A pivot 28 is formed at the tip, and the main body is divided into, for example, a trident, and a claw 29 is formed at the tip.

As shown in the figure, each pawl 29 engages with the valley of the threaded portion 23 of the operating rod, and when the threaded portion 23 rotates, the entire adjustment nut 27b is aligned parallel to the axis. It is configured to move up and down (move left and right in the figure).

Incidentally, the claws 29 of the adjustment nut may be provided at equal intervals of 90° each in four pieces.

The tips of the adjustment nuts 27a and 27b project outside the housing 13, and a pivot 28 provided at the tips fits into a spherical seat 30 formed on the back surface of the mirror holder 12.

In this case, by forming a protrusion 28a on the circumferential surface of the pivot 28 and fitting it into a groove 30a formed in the spherical seat 30, the operating rods 19a, 19b can be freely oscillated, while their axis Configure it so that it does not rotate around the heart.

Incidentally, the flanges 27' provided on the circumferential surfaces of the adjusting nuts 27a, 27b are designed to prevent the nuts 27a, 27b from protruding too much when they protrude outward as the operating rod 19a or 19b rotates. Acts as a stopper.

That is, when the operating rod moves too far forward, the collar 27' collides with the annular ridge 13a shown in FIG. It has the effect of

Incidentally, inside the housing 13 are worm gears 31a and 31b that mesh with the worm wheels 17a and 17b.
The output shafts of reversible motors 32a and 32b are connected to these worm gears on their axes.

Note that these motors 32 at 32 b are the fourth to fifth motors.
As shown in the figure, the fastening piece 13 inside the housing 13
It is something that sticks to a.

FIG. 11 shows the DC motor 32a. 32b shows an example of the operating circuit, in which reference numeral 33 is a power source, 34 is a knob operated by the driver, and this knob is attached to the driver's seat, and this knob 34 is connected to the arrows a, b, c, . It is configured so that it can be pushed down in the direction of...

However, if the knob is pushed down, the numbers 35 to 3 in the figure
When one of the receiving plates indicated by 8 is pressed, one of the contacts 39 to 42 interlocked with the receiving plate is activated, thereby driving the motor 32a or 32b in either the forward or reverse direction. There is.

The mirror drive device of the present invention has the above-mentioned configuration, and its operation will be described below.

When using this device, please use the knob 3 attached to the driver's seat.
4, for example, to the side of arrow a.

When this happens, the receiving plate 35 is moved by the knob, and the contact 39 linked thereto is turned on, and voltage is applied to the DC motor 32b, causing the motor to rotate.

When the motor 32b rotates, the worm gear 31b fixed to its output shaft starts rotating, and the worm wheel 17b meshing with this gear starts rotating.

In such a case, the operating rod 19b that is engaged by the engagement relationship between the concave groove 26 formed at the end of the foil and the protrusion 22
rotates.

When the operating rod rotates, the adjusting nut 27b, which engages with the threaded portion 23 of the operating rod via the pawl 29, is prevented from rotating by the action of the protrusion 28a provided on the pivot 28 at its tip. Eventually, the adjustment nut 27b moves in the axial direction simultaneously with the rotation of the worm wheel 17b, and presses (or pulls) the mirror holder 12 attached to its tip from the rear side.

As a result, the angle of the mirror 11 is adjusted in the vertical direction using the pivot 15 provided at the tip of the support shaft 14 as a fulcrum.

On the other hand, when adjusting the angle of the mirror 11 in the left-right direction, the operating knob 34 is pushed down in the direction C, for example, to energize the DC motor 32a.

In this way, the worm gear 31a attached to the output shaft of the motor rotates, and the operating rod 19a moves back and forth in the same manner as described above, so that the mirror 1
The horizontal angle of 1 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 11 with a finger.

In this case, the claw 29 of the adjusting nut 27a or 27b, which is engaged with the operating rod 19a or 19b, is forcibly spread out due to the elasticity and moves back and forth due to the pressure of the finger. Angle adjustment is performed manually using the tip of the shaft 14 as a fulcrum.

As described above, according to the present invention, the operating rod 19a or 19b, which is an important element in the mirror angle adjustment mechanism, can swing freely in the conical direction, unlike the conventional type. The pivot portion P disposed at the tip of the operating rod rotates around the mirror's pivot center X as the first rotation center.
Even when moving along the trajectory line y in the figure, no strain is placed on the operating rod, and as a result, even if the position of the pivot part P is slightly misaligned with respect to the mirror rotation center X due to accuracy problems during assembly. Also, it exhibits the effect that it does not affect the operation of the mirror in any way.

In addition, in the present invention, even when manually adjusting the mirror angle, the adjustment nut 27a or 27b with the claw 29 elastically grips the adjustment screw 23 that regulates its position evenly from the periphery. Since it can be adjusted using the click-stop method, it has the advantage that the adjustment can be made minutely and accurately.

[Brief explanation of the drawing]

Fig. 1 is a partially longitudinal side view showing a conventional electric mirror drive device, Fig. 2 is a rear view of a portion of the same mirror, and Fig. 3 is a side view showing an embodiment of the mirror drive device of the present invention. , Fig. 4 is a rear view showing the same with a part cut away, Fig. 5 is a sectional view taken along the line ■-■ in Fig. 4, Fig. 6 is a side view showing the same with a part cut away, and Fig. 7. is an enlarged sectional view of the base of the operating rod, FIG. 8 is a partially longitudinal side view showing the relationship between the operating rod and the adjustment nut, and FIG. 9 is an end view of the worm wheel.
FIG. 10 is a sectional view taken along line X--X in FIG. 8, and FIG. 11 is a wiring diagram showing the operating circuit of the DC motor. 11: Mirror, 12: Mirror holder, 13: Housing, 13a: Annular ridge, 14: Support shaft, 15: Pivot, 16: Spherical catch, 17a, 17b: Worm foil,
18a, 18b: Shaft hole, 19a, 19b: Operating rod, 28
: Root of operating rod, 21: Curved surface, 22: Projection, 23:
Threaded part, 24: Support shaft part, 25: Sliding surface, 26: Concave groove, 2
7': Tsuba, 27a, 27b: Adjustment nut with pivot,
28: Pivot, 28a: Projection, 29: Claw, 30: Spherical catch, 31a, 31b: Worm gear, 32 a,
32 b: Motor, 33: Power supply, 34: Operation knob, 3
5 to 38: receiving plate, 39 to 42: contact.

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 driving device which is attached to the rear surface of the mirror so as to be swingable but not rotatable, the operating rod is composed of a threaded portion having a base portion, and an adjustment nut with a pot that engages the threaded portion, and A curved surface with a protrusion is formed at the base of each of the operating rods, and this is fitted into an arcuate sliding surface with a rotation stopper provided in the shaft hole of the worm wheel, thereby tightening the screw of the operating rod. The part rotates together with the worm wheel and can also swing in a conical direction, and furthermore, an adjustment nut having a claw that engages the threaded part of the operating rod is arranged on the axis of the threaded part. At the same time, a flange for preventing removal is formed protrudingly on the outer peripheral surface of the nut, and a worm gear is engaged with each of the worm wheels, and an output shaft of a motor is directly attached to each of the worm gears. A two-motor mirror drive device characterized by: 2. A flexible adjusting nut 27a or 27b having claws 29 arranged at intervals of 90° or 120° from each other on the axis of the threaded portion of the operating rod;
A two-motor type mirror drive device according to claim 1, wherein these claws are pressed into contact with the threaded portion of the operating rod.