JP2000159021A - Angle adjusting mechanism of rear view mirror - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an angle adjusting mechanism of a rear view mirror free of a shift of the adjusting angle even if a motorcycle runs in a off-road condition, etc., where a large vibratory acceleration is generated, giving certainly a compression force required to make setting of the adjusting torque, embodied at a low cost, and easy to perform the torque adjustment in assembling. SOLUTION: An angle adjusting mechanism of a rear view mirror is equipped with a joint 4 furnished at one end with a convex spherical surface 4a and at the other end with a fixing means to the specified position on a vehicle and housing 1 equipped at the obverse surface with a mirror 3 and at the reverse surface with a swell out part in convex spherical surface, wherein the concave spherical surface 4a and convex spherical surface of the housing 1 are put in pressure contact and sliding resiliently using two coned disc springs 21a and 21b so that the angle of the mirror 3 is adjusted. The disc springs having center hole are arranged 'in series', located by inserting through the center holes, and energized by driving a screw 9 penetrating a through hole in the center of a center guide into the joint 4 with the aid of the center guide, which ensures a good accuracy in the setting operation of the adjusting torque with screw 9.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rearview mirror of a vehicle, and more particularly, to a mechanism for adjusting a viewing angle of a rearview mirror used in a motorcycle or the like.

[0002]

2. Description of the Related Art A conventional rearview mirror angle adjusting mechanism will be described with reference to a side sectional view of FIG. 2 and a structural view of a joint portion of FIG. In FIG. 2, reference numeral 1 denotes a housing, a mirror 3 is attached to a front edge of the housing 1 via a retainer 2, and a nut is attached to a front end of one end of a separate stay 10 on the back of the housing 1. A connecting means for connecting to the joint 4 attached by 11 is provided, and the other end of the stay 10 is attached to a handlebar (not shown) of the motorcycle via an attaching member. Then, by moving the housing 1 holding the mirror 3, the visual field obtained by the mirror 3 is changed to XM-X
It is adjusted by adjusting the angle θ about the M axis and the angle α between the XX axis and the XM-XM axis.

The housing 1 on the back of the housing 1
2 and the exploded structural view of FIG. 4 will be described below. On the back surface of the housing 1, a spherical bulge 1a is formed.
The upper plate 5 has a substantially hemispherical surface having a radius along the spherical surface in the spherical concave portion, and the bulge portion 1a of the housing 1 is formed in the spherical concave portion. An inner plate 6 having a substantially hemispherical surface and a spherical seat 7 having a hemispherical surface along its inner surface are superimposed with a radius along the inner surface of the protrusion 1a.

At the center of the spherical recess 4a of the joint 4, a square pole 4c is formed so as to protrude, and a screw hole 4d is provided at the center of the square pillar 4c. At the center of the housing 1, the upper plate 5, and the inner plate 6, round holes 1b, 5a, 6a each having a diameter slightly larger than the diameter of the circumscribed circle of the square pillar 4b of the joint 4 are provided. Also,
At the center of the spherical seat 7, there is formed a square hole 7a to be fitted with the square pole 4c of the jount 4.

Reference numeral 8 denotes a coil spring wound so as to gradually increase in diameter. The coil spring 8 is inserted into the screw 9, and the screw 9 is screwed into the screw hole 4 d of the joint 4 and tightened while the large-diameter end of the coil spring 6 is in contact with the inner surface of the spherical seat 7. Compress moderately.

In the conventional rearview mirror constructed as described above, when the housing 1 is operated by hand, the portion between the upper plate 5 and the housing 1 and the inner plate at the joint portion with the joint 4 on the rear surface of the housing 1 are provided. 6
And the entire housing 1 moves by sliding between the
The direction and angle of the mirror 3 can be changed and adjusted to a desired angle. That is, the angle α between the XX axis and the XM-XM axis and the angle θ about the XM-XM axis can be adjusted. By changing the amount of compression of the coil spring 9 by turning the screw 9, the torque required for adjusting the angle changes.

The range of the angle adjustment is ± about 15 degrees from the state shown in FIG. 2 for the angle α, and 360 degrees for the angle θ.

The mounting of the mirror 3 is performed after the assembly and adjustment of the connecting portion with the joint 4 on the rear surface of the housing 1 are completed. That is, after setting the specified torque, the mirror 3 framed by the retainer is pushed into the housing 1, and the assembly of the rearview mirror is completed.

[0009]

However, a motorcycle equipped with such a rearview mirror may be subjected to a situation such as off-road where a large vibration acceleration is generated, or a situation where the rearview mirror is subject to vibration or wind pressure. When traveling, the adjustment angle may be shifted.
Therefore, it is necessary to prevent the deviation of the adjustment angle by increasing the compressive force of the coil spring 8 and strongly pressing the overlapping portion. However, it was impossible to design a coiled spring capable of obtaining a necessary compressive force in a limited space at present from the viewpoint of material strength. An object of the present invention is to provide a rearview mirror angle adjusting mechanism that solves such inconveniences, reliably obtains a compressive force necessary for setting an adjusting torque, is inexpensive, and allows easy adjustment of assembly torque. As an issue.

[0010]

SUMMARY OF THE INVENTION According to the present invention, there is provided a joint having a concave spherical surface at one end and fixing means for fixing a predetermined portion of a vehicle at the other end, a mirror mounted on the front surface, and a convex surface on the rear surface. A housing with a spherical bulge;
In a rearview mirror in which the concave spherical surface of the joint and the convex spherical surface of the housing are pressed against each other by a spring to adjust the angle by adjusting the sliding, the springs are a plurality of disc springs, and the plurality of disc springs are mutually connected. This can be solved by being arranged in series.

According to the present invention, the above-mentioned object is achieved in the above-mentioned item, in which the disc spring is positioned and a screw penetrating through the through hole is connected to the joint via a center guide having a through hole in the center. This problem is solved by screwing the bolts against each other and tightening them to bias the disc springs arranged in series.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The angle adjusting mechanism for a rearview mirror according to the present invention enables the direction of the mirror to be adjusted in an arbitrary direction, and furthermore, a spring for elastically pressing a sliding portion for holding the direction. In addition, a disc spring is used.

A plurality of disc springs can be stacked, and various load characteristics can be obtained depending on how they are stacked. Therefore, by selecting the number of sheets and how to overlap, in a limited space such as inside the housing of the rearview mirror for automobiles,
It is also possible to set a desired mirror adjusting torque.

According to the present invention, a plurality of disc springs are stacked in "series", that is, in different orientations such that adjacent ones are aligned with the back or belly. By doing so, the load-deflection characteristics can be made gradual, so that the rotation angle of the screw for tightening the disc spring for obtaining a desired load change amount becomes large, and the adjustment work becomes easy, The accuracy is improved.

Each disc spring has a hole at the center.
Insert the screw into this hole to position the disc spring, and screw a screw that passes through the through hole into a joint via a center guide that has a through hole in the center, and tighten the screw to remove the disc. The compression adjustment of the spring is performed.

[0016]

FIG. 1 is a side sectional view for explaining an embodiment of the present invention. The same parts as those in FIG. 2 described above are denoted by the same reference numerals, and will be partially described.

Reference numeral 1 denotes a housing.
The mirror 3 is attached to the front edge of the vehicle 1 via a retainer 2, and the rear surface of the housing 1 is swelled so that this portion is attached to the handle (not shown) of the motorcycle.

On the back of the housing 1, a spherical bulge 1 is provided.
a, a spherical recess 4a is formed in the Joint 4 in the side direction, and an upper plate 5 having a substantially hemispherical surface having a radius along the spherical surface in the spherical recess, and a bulging portion of the housing 1. 1a, an inner plate 6 having a radius along the inner surface of the bulging portion 1a, and a spherical seat 7 having a hemispherical surface are superposed. A square pillar 4c is located at the center of the spherical recess 4a.
Are formed to project, and a screw hole 4d is provided in the center of the square pole 4c. In the center of the housing 1, the upper plate 5, and the inner plate 6, a round hole 1b having a diameter larger than the diameter of the circumscribed circle of the square pillar 4b of the joint 4,
5a and 6a are provided respectively. In the center of the spherical seat 7, there is formed a square hole 7a to be fitted with the square pole 4c of the JOINT 4. The configuration so far is the same as the above-described conventional one.

Reference numeral 21 denotes a disc spring. As is well known, a disc spring is formed by processing a plate material such as steel into a dish shape, and even one sheet is used. However, a plurality of sheets can be used to obtain a wide range of load characteristics.

Here, the combination of the disc springs and the load characteristics will be described. FIG. 6 is a sectional view of the disc spring, in which D is called an outer diameter and d is called an inner diameter. In addition, T is the plate thickness, H and h are the depths of the dishes, and the combination of the disc springs described below is a case where a plurality of the same dimensions are used.

As shown in FIG. 7, a combination in which two sheets are arranged in different directions from each other is called a "series" combination. In the series combination, as shown in FIG. 7, the outer diameter portions are arranged so that the edges of the outer diameter portions are in contact with each other, and the back surfaces of the inner diameter portions are in contact with each other as used in the embodiment of the present invention in FIG. There is also an arrangement in which the load characteristics are the same. FIG. 8 shows a “parallel” combination in which two sheets are overlapped in the same direction.

FIG. 9 shows a load-deflection characteristic for such a combination example. δ is the amount of deflection, P is the load,
The characteristic A is obtained when only one disc spring is used, and the characteristic B is obtained when two disc springs are combined in series as shown in FIG. The characteristic C is obtained when two disc springs are combined in parallel as shown in FIG. As described above, when two sheets having the same characteristics are combined in “series”, the amount of deflection δ required to obtain the same load P, in other words, the compression size increases, compared to the case of only one sheet. However, when the load is adjusted by tightening the screws, the adjustment work becomes easy.

In the present embodiment, reference numerals 21a and 21b
The sheets are used in a combination of "series" described above, that is, a combination in which the back side of the inner diameter portion and the protruding side are brought into contact with each other.

Reference numeral 22 denotes a center guide, a perspective view of which is shown in FIG. A guide 22a which is a short tube and is inserted into the center hole of the disc springs 21a and 21b to position the disc springs;
It comprises a washer 22b, which has a flange shape and receives the screw 9 on the front surface and presses the disc spring 21 on the back surface, and a central through hole 22c.

The assembly procedure will be briefly described. As shown in the diagram of the spherical seat 7 in FIG.
The outer diameter side of one disc spring 21a is applied to the other disc spring 2a.
1b is disposed so that the protruding sides thereof are in contact with each other as described above, and the guide 22a of the center guide 22 is inserted into holes (not shown) provided at the centers of the disc springs 21a and 21b.

The center guide 22 has two disc springs 21.
a, 21b are positioned so as not to deviate from the spherical seat 7,
The outer edge of the disc spring 21b is pushed by the washer 22b. The screw 9 is passed through the hole 22c of the center guide 22 and screwed into the screw 4d of the joint 4, and the screw is turned to compress the disc springs 21a and 21b.

As described above, even if only one disc spring is used,
The required load can be obtained by changing the plate thickness and other dimensions. However, in this case, the amount of compression is small, and when the rotation angle of the screw 9 is set to less than half a rotation, it becomes difficult to adjust the load with high accuracy. . Therefore, since the number of disc springs is two as described above, the spring constant of the disc spring row is 分 の.
Since the rotation angle of the screw 9 is doubled, practical setting accuracy of the mirror torque can be obtained.

In the above embodiment, the number of disc springs is two. However, if the number of disc springs is further increased, the accuracy of setting the torque is further improved.

Further, by using a screw 9 which has been subjected to a loosening prevention process, an angle adjusting mechanism can be provided which does not deviate the adjustment position even when the vehicle is vibrated or impacted.

[0030]

As described above, according to the present invention, a plurality of disc springs are used in series with a spring elastically pressing the sliding portion of the angle adjustment mechanism of the rearview mirror. The compression force required for the angle adjusting torque can be obtained even in a limited space such as the housing of the rearview mirror.

Also, since a plurality of disc springs are stacked in series, the spring constant of the disc spring row can be reduced, and the rotation angle of the adjusting screw when setting the angle adjusting torque can be increased. Was able to improve the work accuracy.

Since a commercially available standard product can be used as the disc spring, it is inexpensive and the structure can be simplified.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view illustrating the structure of one embodiment of the present invention.

FIG. 2 is a cross-sectional view illustrating the structure of a conventional rearview mirror.

FIGS. 3 (a) and 3 (b) are part diagrams of a part of a rearview mirror.

FIG. 4 is an exploded view illustrating a partial structure of a rearview mirror.

FIG. 5 is a perspective view of one component of the present invention.

FIG. 6 is a side view of the disc spring.

FIG. 7 is a side view of a combination example (series) of disc springs.

FIG. 8 is a (parallel) side view of a combination example of a disc spring.

FIG. 9 is a load characteristic diagram of a disc spring.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Housing 1a Swelling part 2 Retainer 3 Mirror 4 Joint 4a Concave spherical surface 5 Upper plate 6 Inner plate 7 Spherical seat 9 Screw 21a, 21b Disc spring 22 Center guide

Claims (2)

[Claims] 1. A joint having a concave spherical surface at one end and fixing means for fixing to a predetermined portion of a vehicle at another end, a housing having a mirror mounted on a front surface and a convex spherical convex portion on a rear surface, and a concave portion of the joint. In a rearview mirror in which a spherical surface and a convex spherical surface of a housing are pressed and slidable by a spring to adjust an angle, the spring is a plurality of disc springs, and the plurality of disc springs are arranged in series with each other. An angle adjusting mechanism for a rearview mirror. 2. A joint having a concave spherical surface at one end and fixing means for fixing to a predetermined part of the vehicle at the other end, a housing having a mirror mounted on the front surface and a convex spherical convex portion on the rear surface, and a concave portion of the joint. In a rearview mirror in which the spherical surface and the convex spherical surface of the housing are pressed and slidable by a spring to change the angle, the spring is a plurality of disc springs, and the plurality of disc springs are arranged in series with each other. At the same time, the disc spring is positioned, and a screw penetrating the through hole is screwed into a joint via a center guide having a through hole in the center, and the screw is tightened. An angle adjustment mechanism for a rearview mirror, wherein a spring is biased.