JPS5937397Y2 - Back mirror adjustment device - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a device for rapidly adjusting the inclination angle of a rearview mirror installed outside an automobile.

To adjust the angle of inclination of the rearview mirror, there are methods that allow you to manually adjust the angle directly, and methods that use wire operation to adjust the angle.However, the electric type that uses a drive motor is located in the driver's seat and allows you to finely adjust the angle. Since it can be controlled remotely, adjustment work can be done easily and accurately.

In such electric models, the rotation of the drive motor is transmitted to the mirror using an electric mechanism such as screws and gears to adjust the angle, but if a failure occurs in the transmission part, the mirror does not move. When it runs out, you have to manually adjust the angle from the mirror side and use it accordingly.

However, at this time, the transmission mechanism such as screws and gears is used like a clutch, so manual adjustment becomes sluggish and accurate adjustment cannot be expected.

Furthermore, unreasonable adjustment may place an excessive load on various parts of the mechanism, resulting in damage or destruction.

In order to avoid this, various mechanical devices have been devised in the past, but some have been designed so that the corresponding parts that engage with screws and gears go over the threads and tooth tips during manual adjustment. There were many problems, and the engaging portions were subject to considerable wear, and the adjustment width was adjusted according to the pitch of the screws and gears, so there was a drawback that stepless fine adjustment was not possible.

The purpose of the present invention is to provide a structure that does not cause such problems, and the gist of the invention is to
A ball joint is provided along each orthogonal line with this as the intersection point, and each rod connected to this ball joint and each roller that is decelerated and transmitted through gears by the rotation of the drive motor are connected by springs. The structure is such that the rod is moved by pressing the rod into contact with the rod.

Next, the structure of the present invention will be explained with reference to embodiments shown in the drawings.

As shown in FIGS. 1 to 3, a mirror 2 is placed in an opening of a housing 1 and held by a mirror holder 3. As shown in FIGS.

A center joint 4 provided at the center of the back surface 3a of the mirror holder 3 is connected to a stay 5 fixedly provided within the housing 1 so as to be freely swingable.

The center joint 4 has a cylindrical shape and has pins 4a, 4a extending in both directions on the central shaft assembly, and pins 4b, 4b intersecting with these pins and extending in both directions from the cylindrical surface. .

The pins 4a, 4a are sandwiched between and rotatably supported by a fork 3b provided on the mirror holder 3, and the pins 4b, 4a are
b is sandwiched between a forked portion 5a provided on the stay 5 and rotatably supported thereon.

Therefore, the mirror holder 3 can be tilted in any direction and angle with respect to the stay 5.

The center joint 4 may be a universal joint and may be spherical, and the key is to pivot four orthogonal pins to each fork! It is fine as long as it is strained.

A ball joint 6 and a ball joint 7 are provided on the back surface 3a of the mirror holder 3 along orthogonal lines that intersect at the mounting portion of the center joint 4.

Rods 8 and 9 are connected to the ball joints 6 and 7 so as to be able to swing freely.

Inside the housing 1 is a drive motor 1 as shown in FIG.
0 and 11 are fixedly installed, and their respective rotations are transmitted at a reduced speed to two rollers via two systems of gears, and the two rollers contact rods 8 and 9, respectively, and move each rod. It looks like this.

The transmission mechanism from the drive motor to the two rollers via two systems of gears has a similar structure.
Here, one of them will be explained with reference to FIGS. 5 to 7.

A worm 12 is connected to the rotating shaft of the motor 10, and a first stage worm wheel 13 is engaged with the worm 12.

Further, a worm 14 is coaxially connected to the worm wheel 13, and a second stage worm wheel 15 is engaged with the worm 14.

A roller 16 is coupled coaxially with the worm wheel 15.

Therefore, the rotation of the motor 10 is transmitted to the roller 16 while being decelerated in two stages by the worm gear mechanism.

The rod 8 that comes into contact with the roller 16 as it rotates
moves.

Similarly, the rotation of the motor 11 causes the rod 9 to move.

If the pole joytro that connects the rod 8 is positioned above the center joint 4, the movement of the rod 8 will cause the mirror holder 3 and therefore the mirror 2 to move vertically around the center joint 4. Become.

Also, since the ball joint 7 that connects the rod 9 is located on the side of the center joint 4, the rod 9
As a result of this movement, the mirror 2 comes to rotate in the left-right direction about the center joint 4.

By combining the movement of the rod 8 and the movement of the rod 9, the inclination angle of the mirror 2 can be adjusted freely.

In the present invention, the roller 16 and the rod 8 are pressed into contact with each other with an appropriate pressing force by the leaf spring 17, and the rotation of the roller 16 moves the rod 8, so that the angle of the mirror 2 is adjusted. .

Similarly, the other roller and the rod 9 are pressed into contact with each other by the leaf spring 18, and the angle of the mirror 2 is adjusted by moving the rod 9.

As configured as described above, the present invention has various advantages as follows.

(a) Since the roller and the rod are pressed into contact with each other with an appropriate pressure contact force, the rotation of the roller ensures the movement of the rod.

(b) If a failure occurs in the transmission part from the motor to the roller and the mirror stops moving, the angle can be adjusted manually from the mirror side.

At this time, even if the mechanism of the transmission part is like a clutch, the rod simply slides on the surface of the roller, and adjustment work can be easily performed regardless of the state of the transmission part.

Furthermore, since no excessive load is applied to the transmission mechanism, it will not be damaged or destroyed.

(c) When adjusting the angle manually, the rod slides on the roller surface, so the adjustment is made steplessly and minutely.

B) Since it is a combination of rollers and rods, the number of component parts is small and the parts are easy to manufacture.

By using a plastic material or a bottom rubber material for the roller, a structure compatible with the rod can be obtained at low cost.

(E) By appropriately selecting the pressure force of the spring and providing knurling notches on the surface of the roller, the rotation of the roller can be transmitted to the rod without slipping and the rod can be moved.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG. 1 is a longitudinal cross-sectional view of the main part of the rearview mirror, and FIG. 2 is a cross-sectional view of the main part of the rearview mirror, taken along line A-A in FIG. , Figure 3 is the second
Figure 4 is a perspective view of the transmission mechanism from the motor to the rod; Figure 5 is a partially cutaway perspective view of one transmission mechanism; Figure 6 is Figure 5C. Plan view from the direction,
FIG. 7 is a side view seen from the sixth drawing direction. 1...Housing, 2...Mirror, 3
...Mirror holder, 3a...Back, 3b...
...Forked part, 4... Center joint, 4a
, 4b...pin, 5...stay 5a.
...Forked part, 6,7...Ball joint, 8.9...Rod, 10.11...
・Drive motor, 12... Worm, 13...
... Worm wheel, 14 ... Worm,
15... Worm wheel, 16...
Roller, 17, 1B...Plate spring.

Claims (1)

[Scope of utility model registration request] A center joint is provided at the center of the back of the mirror holder that holds the mirror, and the center joint is freely connected to a stay fixed to the housing. Each rod is provided with a ball joint, and each rod is connected freely to the ball joint, and each roller is speed-transmitted via gears by the rotation of a drive motor installed in the nozzing. A rearview mirror adjusting device characterized in that the rod is moved by being pressed into contact with a spring.