JPH0129149Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an anti-glare mirror for automobiles.

General anti-glare mirrors for automobiles are designed so that the reflectance of the mirror can be switched depending on daytime and nighttime, in order to prevent the driver from being dazzled when the lights of the following car hit the mirror and reflect. It is composed of FIGS. 1 and 2 show conventional examples of such anti-glare mirrors. That is, a mirror a is disposed in the entire opening of the housing b, a bracket e is connected to the stay c via a ball joint d, and the bracket e is disposed inside the housing b. The bracket e is pivotally mounted on both upper sides of the bracket e so as to be able to tilt the inner surface of the housing b, and has an operating lever f engaged at its lower end. The operating lever f is
Both upper sides of the housing b are pivotally supported on the inner surface of the housing b, and the lower part of the housing b projects outward from a bottom opening g formed in the bottom wall of the housing b.

Then, by switching the operating lever f in the direction of the arrow and rotating it relative to the housing b, the housing b is tilted relative to the bracket e, thereby changing the mounting position of the mirror a, thereby causing the reflection of the mirror a. It is now possible to switch rates.

By the way, in the conventional example shown above, the operation lever f
2, the lower part of the operating lever f comes into contact with the rear end of the housing bottom opening g, as shown by the solid line in FIG. Because of this structure, when the operating lever touches the front and rear ends of the bottom opening g, a contact sound is generated, and the lower end of the operating lever f has a large amount of movement when switching. Therefore, the problem is that the contact noise can become very loud and become noise, making it difficult to hear.

In order to improve this problem, a rearward protrusion is provided on the upper part of the operating lever, and a pair of upper and lower stoppers that can come into contact with the protrusion are formed on the inner surface of the housing, thereby reducing the contact noise when switching the reflectance. It has been proposed that contact noise be suppressed by reducing the amount of movement generated within the housing and by reducing the amount of momentum (see Japanese Utility Model Application Publication No. 110637/1983).

However, although this structure can reduce the contact noise, there are problems in that the corner of the protrusion comes into contact with the stopper, so the stopper is easily damaged and the switching position lacks stability. .

The present invention not only improves these points and reduces the contact noise between the operating lever and the stopper, but also allows the lever and the stopper to come into contact with each other in a surface contact state. It is an object of the present invention to provide an anti-glare mirror for an automobile that can prevent damage and maintain a stable position after switching.

An embodiment of the present invention will be described below with reference to FIGS. 3 to 10.

In the anti-glare mirror for an automobile according to the present invention, a bracket 3 is connected via a ball joint 2 to a stay 1 to be fixed to a vehicle body (not shown), and the bracket 3 is pivotally mounted on the inner surface of a housing 4. The housing 4 has a shallow box shape with an open front, and a mirror 5 is disposed in the front opening.

The bracket 3 has shafts 31, 3 on both sides of its upper part.
1, and the shafts 31, 31 are pivotally connected by fitting into support parts 41, 41 formed on the inner surface of the back wall 4a of the housing 4. Also bracket 3
forms a groove 32 with a V-shaped cross section on its lower edge,
The operating lever 6 is engaged with the groove 32. As shown in FIGS. 5 and 6, the operating lever 6 has an engaging protrusion 61 formed at its upper end, and shaft parts 62, 62 formed on both sides of the upper end.
1 into the groove 32 at the bottom of the bracket, and
The shaft portions 62, 62 are pivotally supported on support portions 42, 42 formed at the lower part of the inner surface of the housing back wall 4a, and the lower portions thereof protrude outward from a bottom opening 43 provided in the housing bottom wall 4b. .

When the operating lever 6 is switched, the operating lever 6 rotates around the shaft parts 62, 62, and at the same time, the housing 4 tilts around the shafts 31, 31 with respect to the bracket 3, so that the mirror 5 is rotated. By changing the mounting angle, the reflectance of the mirror 5 can be changed. Therefore, as a matter of course, the ball joint 2 is provided with a connecting force to prevent the bracket 3 from rotating relative to the stay 1 when the housing 4 is tilted. The ball joint 2 is composed of a spherical seat 33 formed on the upper part of the bracket 3, and a spherical part 11 that fits into the spherical seat 33 and is formed at one end of the stay 1, and is integrally connected to the housing 4 with respect to the stay 1. When the bracket 3 is rotated and tilted, the mirror 5 can be positioned in a desired direction. Note that 4c is a notch provided in the upper part of the housing 4, through which the ball joint 2 is inserted.

Therefore, in the present invention, a switching sound reduction mechanism is provided to reduce the sound generated when switching the operating lever 6. That is, the switching noise reduction mechanism has extension shafts 63, 63 formed at the tips of the shaft portions 62, 62 of the operation lever 6, respectively, and an arcuate bulge 64, on the outer periphery of each extension shaft 63, 63. 6
4 respectively. The extension shaft 63 is formed at the tip of the shaft portion 62 and has the same diameter as the shaft portion 62 and extends along the axial direction. is formed protrudingly within the range of an appropriate angle α with respect to the central axis on the outer periphery of the circular arc centered on the central axis. One end surface 64a and the other end surface 64b
is formed. On the other hand, a stopper 44 is provided on the inner surface of the housing 4 and can come into surface contact with one end surface 64a and the other end surface 64b of the arcuate bulge 64 when the operating lever 6 is switched to a position facing the extension shaft 63. and 45, respectively.
The stopper 44 is formed on the inner surface of the housing back wall 4a so as to face forward, and when the operating lever 6 is switched forward, the stopper 44 touches one end surface 64 of the arcuate upper protrusion 64.
a are brought into contact with each other in surface contact. The stopper 45 is formed to be slightly raised on the inner surface of the housing bottom wall 4b, and is adapted to come into contact with the other end surface 64b of the arcuate upper projection 64 when the operating lever 6 is switched rearward. Therefore, the appropriate angle α of the arcuate upper protrusion 64 of the operating lever 6 corresponds to the rotation angle α' when the operating lever 6 is switched. Note that when the operation lever 6 is rotated, its extension shaft 63
Since there is a risk that the rotation of the operating lever 6 may be obstructed by hitting the stopper 44, flat portions 65a, 6 are cut out and provided at substantially opposing upper and lower positions of the extension shaft 63.
5b respectively.

The operating lever 6 also has a bottom opening 43 at a position facing the bottom opening 43 of the housing 4.
A closing protrusion 66 is provided to cover almost the entire area. The closing protrusion 66 closes the bottom opening 43 of the housing 4 when the operating lever 6 is switched rearward.
It has become possible to block the

The anti-glare mirror for automobiles according to the present invention has the above-described structure, so when the operating lever 6 is moved forward as shown in FIG. 9 in order to change the reflectance of the mirror 5, the extension shaft 63 of the operating lever 6 is By rotating, one end surface 64a of the arcuate bulge 64 comes into contact with the stopper 44 of the housing 4, and when the operating lever 6 is switched as shown in FIG. 45, the contact noise at the time of switching can be reduced.Moreover, the contact between the arcuate bulge and the stopper is surface contact in all cases, so the arcuate bulge and stopper are in contact with each other. The stopper is not damaged and its switching position can be stably maintained.

As described above, according to the present invention, it is possible to reduce the contact noise when switching the operating lever, prevent damage to the structural members, and stably maintain the switching position.

[Brief explanation of the drawing]

FIG. 1 is a front view showing an example of a conventional anti-glare mirror for an automobile, and FIG. 2 is a sectional view taken along the line -- in FIG. Fig. 3 is a front view showing an embodiment of an anti-glare mirror for an automobile according to the present invention, and Fig. 4 is a -
5 is a front view showing the operating lever, FIG. 6 is a sectional view taken along the - line in FIG. 5, FIG. 7 is a front view of the right half of the housing, and FIG. 8 is taken along the - line in FIG. 7. An enlarged sectional view, FIG. 9 is a sectional view of the main part showing a state where the operating lever is switched forward, and FIG. 10 is a sectional view of the main part showing a state where the operating lever is switched backward. 1... Stay, 2... Ball joint, 3... Bracket, 4... Housing, 43... Bottom opening, 4
4,45...stopper, 5...mirror, 6...
Operation lever, 61... engaging protrusion, 62... shaft portion,
63...Extension shaft, 64...Circular bulge, 64a
...One end surface of the arc-shaped bulge, 64b... The other end surface of the arc-shaped bulge, α... Angle.

Claims (1)

[Scope of utility model registration request] A mirror is disposed in the front opening of the housing, a bracket is connected to a stay to be fixed to the vehicle body via a ball joint, both upper sides of the bracket are pivotally connected to the inner surface of the housing, and the lower end of the bracket is The operating lever has an engaging protrusion formed on the upper part and capable of engaging with the lower end of the bracket, and a shaft part formed on both sides of the upper part and pivoted on the inner surface of the housing. In the anti-glare mirror for an automobile, the lower part of which protrudes outward from the bottom opening of the housing, an extension shaft is formed at the tip of the shaft portion of the operating lever, and an extension shaft is formed on the outer periphery of the extension shaft. an arcuate bulge projecting radially within a certain angular range from the center of the housing; When the operating lever is rotated in one direction with respect to the housing, one end surface of the arcuate bulge comes into surface contact with one of the stoppers, and the operating lever is rotated in the other direction. 1. An anti-glare mirror for an automobile, characterized in that the other end surface of the arcuate bulge comes into surface contact with the other stopper when the mirror is rotated.