JPH018440Y2 - - Google Patents

Description

[Detailed Description of the Invention] Technical Field The present invention relates to a device for remotely controlling the angle of so-called outer mirrors such as fender mirrors and door mirrors of automobiles from inside the vehicle, and is particularly concerned with the phenomenon of mirror chatter caused by driving vibrations and wind pressure. The present invention relates to an angle adjustment device for an outer mirror that prevents this.

Prior Art In recent years, a system for electrically adjusting the angle of an outer mirror has been proposed as this type of device, and its structure is generally as follows. That is, the approximately center portion of the mirror is rotatably connected to a predetermined location on the outer surface of the casing of this angle adjustment device using a universal joint method, and the mirror is tilted vertically either above or below the connection portion on the back of the mirror. One end of one mirror push/pull operation shaft for tilting the mirror to the left or right, and one end of one mirror push/pull operation shaft for tilting the mirror in the left or right direction are connected by a universal joint method, respectively. Their respective other ends are introduced into the casing. The other end of each mirror push/pull operation shaft is provided with an outer peripheral screw.
A rotating tube that cannot be moved in the axial direction is screwed onto the outer periphery of this screw, and a motor drive mechanism housed in the casing rotates the rotating tube to move the mirror push/pull operation shaft in the axial direction. This allows the mirror to tilt.

However, in the outer mirror angle adjustment device configured as described above, slight vibrations, or chatter, occur in the mirror due to running vibrations and wind pressure generated when the car is running, and as a result, the image reflected on the mirror becomes unclear. There was a problem with this.

The above problem lies in the method of supporting the mirror with respect to the casing of the device. In other words, there is a certain clearance between the central rotating part using the universal joint system, and there is also a backlash between the outer circumferential screw of each mirror push/pull operation shaft and the inner circumferential screw of the rotating cylinder that is screwed into it. This causes the above-mentioned microvibration, that is, the chatter phenomenon.

Technical Problems of the Present Invention Therefore, the technical problems to be solved by the present invention are such that the mirror can be adjusted at a predetermined angle with respect to the casing without any impediment, and the angle of the mirror can be adjusted with respect to the casing. The aim is to stabilize the machine in the correct position and alleviate the chatter phenomenon.

Configuration of the present invention In order to achieve the above technical problem, the present invention was configured as follows.

That is, hook parts are formed on both sides of the line passing through the rotational connection part on the back of the mirror, for example, one or two 45-degree inclined lines or two lines, a horizontal line and a vertical line, and a stretchable string is formed. A body, such as a rubber cord or a string including a spring, is stretched along the above line on the back of the casing and each end is fixed to each hook, and the string is slid at a predetermined location along the above line on the back of the casing. A support portion that supports the device in a movable manner is formed.

According to this configuration, the extensible string is constantly under tension between the pair of hooks, and as a result, a moderate amount of friction occurs between the string and the support part of the casing that supports the string. When the mirror is about to generate a slight vibration, the friction resists this vibration, thereby preventing the mirror from vibrating. Furthermore, when the angle of the mirror is forcibly adjusted by the motor drive mechanism and the mirror push/pull operation shaft, the elastic string slides against the support of the casing, causing no movement of the mirror. It does not interfere with the angle adjustment function. Therefore, the above technical problem can be achieved and the conventional problem of mirror chatter phenomenon can be solved.

Effects of the present invention Various other solutions may be considered in order to prevent the slight vibration of the mirror, but according to the present invention, even a very simple structure of one or two stretchable strings can be used. Therefore, there is an advantage that the above-mentioned problems can be achieved and the conventional problems can be solved.

Embodiment A preferred embodiment of the present invention will be described in detail below.

The mirror angle adjusting device shown in FIGS. 1 and 2 is housed on the back surface of a mirror 1 in a mirror case (not shown), and the casing 2 is fixed within the mirror case. This casing 2 is formed by covering a lower casing 2a with an upper casing 2b. The substantially central portion of the bottom of the lower casing 2a and the substantially central portion of the rear surface of the mirror are rotatably connected to each other by a universal joint. That is, the mirror body 1b
The mirror cover 1a holding the mirror has a hole 1g in its center, a cylinder 1c around the hole 1g that protrudes to the back side, and a total of four holes on the top, bottom, left and right inside the cylinder 1c. It has a sphere 1d connected by a rod 1e. On the other hand, a spherical inner surface 2 with which the spherical body 1d fits and contacts approximately the center of the lower casing 2a.
A bearing portion 2c is provided which has a slit 2d into which each rod 1e is fitted. Thus, the sphere 1d and rod 1e on the mirror side are fitted into the spherical inner surface 2e and slit 2d of the bearing 2c on the casing side, respectively, and the mirror 1 can be tilted vertically and horizontally with respect to the casing 2. .

Below and to the right of the sphere 1d of the mirror cover 1a (in FIG. 1), one end of the mirror push/pull operation shafts 3a and 3b having an outer peripheral screw are connected, while the other end is connected to the bottom of the lower casing 2a. It is introduced into the casing 2 through each hole 2h provided in the casing 2.

Each mirror push/pull operation shaft 3a, 3b has a spherical body 3e on its free end side, and this spherical body 3e is rotatably fitted into a bearing part 1f formed at a predetermined position of the mirror cover 1a.

Rotary cylinders 4a and 4b having inner circumferential screws and outer circumferential gears are screwed into the outer circumferential threads of the respective mirror push/pull operation shafts 3a and 3b introduced into the casing 2 so as to be immovable in the axial direction. Each of these rotating cylinders 4a,
4b are adapted to be rotationally driven by a motor drive mechanism of the same structure housed within the casing 2, respectively. That is, each drive mechanism includes a reversible motor 7a.
or 7b, a gear 8a or 8b fixed to the outer periphery of the output shaft of each motor 7a, 7b, each gear 8a, 8b;
a gear 6a or 6b that meshes with the gear 6a, 6;
It consists of a worm 5a or 5b which is coaxial with the rotor b and meshes with the outer peripheral gear 4d of each of the rotating cylinders 4a and 4b. Incidentally, the selection of the drive of the motors 7a and 7b and the switching of the rotational direction of their output shafts can be remotely controlled by a switch (not shown) installed in the vehicle.

In the above configuration, when one of the motors 7a, 7b is driven by a switch operation, the rotary cylinder 4a or 4b is rotated via a series of transmission members 8a, 6a, 5a or 8b, 6b, 5b.
Then, the rotary cylinders 4a and 4b rotate, and as a result, the mirror push/pull operation shaft 3a or 3b moves in its axial direction, and the mirror 1 is tilted vertically or horizontally about the sphere 1d.

Now, as clearly shown in FIG. 1, hook portions 1h and 1i are formed on both sides of the rear surface of the mirror cover 1a along a line _P1 at an angle of approximately 45 degrees passing through the above-mentioned rotational connection portion. And coil spring 10 in the middle
One end 9a of the wire 9 with a
b is engaged and fixed to one hook portion 1i. Support parts 2f and 2g that support the wire 9 are provided along the line _P1 of the upper casing 2b.
is formed. The wire 9 is attached to this support part 2
f, 2g, and this support part 2
It is designed to be able to slide with a constant frictional force against f and 2g.

In the above configuration, since the wire 9 has the coil spring 10 in the middle thereof, tension is applied at all times, and therefore the support part 2
Provides moderate frictional resistance against f, 2g,
When the mirror 1 attempts to cause a chatter phenomenon due to the above-mentioned running vibrations, etc., the mirror 1 resists this and prevents the chatter phenomenon.

In the figure, the mirror 1 is positioned at the neutral position, but if the angle of the mirror 1 is now adjusted in the direction of the arrow Z in Figure 2, that is, so that the upper part of the mirror is pushed forward, the mirror cover 1a Since the hook portion 1i formed at the upper part of the back side pulls the wire 9, the wire 9 moves obliquely upward along the line _P1 with respect to the support portions 2f and 2g of the upper casing 2b. Conversely, when the angle of the mirror 1 is adjusted in the direction opposite to the direction of the arrow, the wire 9 moves downward in the opposite direction, that is, on the line _P1 . Further, even when the angle of the mirror 1 is adjusted in the left-right direction, the wire 9 moves along the line _P1 relative to the supports 2f and 2g according to the tilting direction of the mirror 1. Therefore, this wire 9 does not pose any hindrance to the angle adjustment of the mirror 1.

As mentioned above, when adjusting the angle of the mirror 1 in the vertical and horizontal directions, the wire 9 slides along the line _P1 with respect to the supports 2f and 2g in both cases. This means that both vertical and horizontal vibrations of the mirror can be prevented.

In the above embodiment, a wire 9 having a coil spring 10 in the middle is used as the elastic string, and this structure has the advantage of good durability, but the present invention is limited to this embodiment. However, it can be implemented in various other ways.

For example, the entire stretchable string may be made of rubber, or rubber may be used instead of the coil spring, and wires may be connected to both sides of the rubber.

In addition, in the above embodiment, the wire 9 is arranged diagonally.
Although it is stretched along the line _P1 at 45 degrees, it goes without saying that it may be stretched along the line _P2 at an angle of 45 degrees orthogonal to this line. Alternatively, two wires 9 may be stretched along both lines P ₁ and P ₂ .

Furthermore, although it is most preferable that the angle of inclination of the diagonal line be approximately 45 degrees, if the angle of inclination is any other suitable angle, it is possible to simultaneously prevent mirror vibration in both left and right directions and up and down directions using one wire.

Furthermore, the direction in which the wires 9 are stretched does not necessarily have to be inclined as described above, but two wires along the horizontal axis X and the vertical axis Y may be used.
The former wire may be used to prevent horizontal vibration of the mirror, and the latter wire may be used to prevent vertical vibration.

In the embodiment shown in Figs. 1 and 2, the mirror push/pull operation shafts 3a and 3b are arranged below and to the right (Fig. 1) of the central mirror rotation part, but they are arranged above and to the left of the central mirror rotating part. Of course, you can do it.

As described above, this embodiment achieves the technical problems of the present invention and can effectively solve the conventional problem of mirror chatter.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway rear view showing a mirror angle adjusting device and a mirror attached to the device according to an embodiment of the present invention, and FIG. 2 is a cross-sectional view taken along the line of FIG. 1. 1... Mirror, 1d... Sphere, 1f... Bearing part, 1h, 1i... Hook part, 2a... Lower casing, 2b... Upper casing, 2c... Bearing part, 2f, 2g... Support part, 3a, 3b...Mirror push/pull operation shaft, 9...Wire (stretchable string),
10...Coil spring.

Claims (1)

[Claims for Utility Model Registration] A substantially central portion of the rear surface of the mirror is rotatably connected to a predetermined location on the outer surface of the casing of the device, and
An angle of an outer mirror of an automobile in which one end of each mirror push/pull operation shaft, which is moved in the axial direction by a drive mechanism inside the casing, is connected to either the upper or lower side or the left or right side of the central connecting part on the back of the mirror. In the adjustment device, hooks are formed on both sides of the line passing through the rotational connection part on the back of the mirror, and a stretchable string is stretched across the back of the casing and along the line, and each end of the string is fixed to each hook. An angle adjustment device for an outer mirror of an automobile, characterized in that a support portion for slidably supporting the string is formed at a predetermined location along the line on the back of the casing.