JPH0115543Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an outdoor rearview mirror (Calfornia mirror) installed on vehicles such as buses, trucks, and high-roof vehicles, and in particular, the invention relates to an outdoor rearview mirror (Calfornia mirror) that is installed on vehicles such as buses, trucks, and high-roof vehicles. Relating to something that reduces resonance.

[Prior Art and Problems] This type of outdoor rearview mirror is generally attached to a stay that protrudes from the front pillar or the like toward the front of the vehicle body.
Here, it is possible to support the rear view mirror vertically via two upper and lower stays along the front pillar, and by doing so, the rear view mirror support rigidity in the vertical and front and rear directions is increased. On the other hand, even if the two stays mentioned above are used, the rearview mirror is supported only cantilevered in the left and right directions, so its rigidity is low. There was a problem in that the rear view mirror and the rear view mirror vibrated significantly in the left and right directions, resulting in poor rear visibility and chattering noise.

Conventionally, in order to reduce the vibration of such an outdoor rearview mirror, for example, Japanese Patent Application Laid-Open No. 70746/1983 suggests that a vibration-preventing stay is attached to increase the rigidity. The structure becomes complicated and unsightly, and it may even get in the way of driving. In addition, as shown in Japanese Utility Model Publication No. 48-9777, in which an elastic body for vibration isolation is interposed between the stay and the vehicle body mounting bracket, the support rigidity of the rear view mirror is reduced by the elastic body. There are problems such as the mirror falling easily.

Furthermore, Japanese Utility Model Application Publication No. 58-25250 discloses that a vibration damper consisting of elastic damper weights arranged on all sides is attached to the back side of the mirror body to suppress vibrations. This is applicable to a structure in which the center part is rotatably attached by a ball joint, and this invention is applicable to a fixed mirror body structure supported at two locations above and below by two stays. is not applicable. Furthermore, in this prior art, the damper weight is in a completely free state, leading to problems such as damage to the damper when a large external force is applied, such as when driving on a rough road.

In view of the problems of vibration damping measures for the mirror body based on the conventional technology, the present invention uses a damper to effectively reduce the horizontal resonance of the mirror body caused by vibration of the vehicle body, and also provides a damper that can be used when driving on rough roads, etc. To provide an outdoor rearview mirror that protects a damper when an excessive external force is applied to the outdoor rear view mirror.

[Means for solving the problem] For this purpose, the present invention has a weight attached to the lower end of a leaf spring that can swing only in the left and right direction, on the back side opposite to the mirror body of the mirror holder installed in the opening of the mirror body. Attach a dynamic damper consisting of a
The horizontal resonance of the mirror body caused by the vibration of the vehicle body is reduced, and stoppers are installed on the left and right sides of the weight installation location to reduce the vibration of the weight when excessive external force is applied, such as when driving on rough roads. The purpose is to regulate the

[Example] Hereinafter, an example of the present invention will be specifically described with reference to the drawings. To explain how the rear view mirror is installed in FIGS. 1 and 2, reference numeral 1 is a front pillar on the side of the front window in the vehicle body, and two upper and lower stays 3, 4 protrudes approximately horizontally toward the front of the vehicle body, and these stays 3,
A large outdoor rear view mirror 5 is attached to the tip of the mirror 4 in a cantilevered manner so that its angle can be adjusted.

In FIGS. 3 and 4, the rearview mirror 5 has a rectangular bowl shape and is attached to the stay side at the opening of the mirror body 6, and the mirror holder 7 is fastened to the mounting base 8 on the body side with screws 9. The mirror body 10 is fixed to the front side of the holder 7 by locking the entire circumference of the mirror body 10.

Therefore, inside the mirror body 6,
A dynamic damper 11 is attached to the back side of the holder 7. This damper 11 has a weight 13 attached to the lower end of a leaf spring 12 that can swing only in the left and right direction.
The upper end of the leaf spring 12 is folded back to the front side through the slit 14 of the holder 7 and fixed with the screws 9 and rivets 15, so that the leaf spring 12 is hung vertically. When the rearview mirror 5 vibrates in the left-right direction, the weight 13 also vibrates in the left-right direction due to the deflection of the leaf spring 12. Here, at the vibration frequency in the left-right direction, which has a relatively large amplitude, the weight 13 vibrates in the left-right direction. 1
The spring constant of the leaf spring 12 and the mass of the weight 13 are set so that the vibration of No. 3 has a phase delay of half a wave.

Further, stoppers 16 are provided on the left and right sides of the installation location of the weight 13, with a gap larger than the amount of weight deflection in normal vibration damping action, and the stoppers 16 are made of a cushioning material and are mirrored. Holder 7
It is fixed by being fitted into a stopper pin 17 that protrudes from the back side.

With the above configuration, when the engine rotational fluctuation is large, for example during idling, and the outdoor rear view mirror 5 vibrates greatly in the left and right direction together with the vehicle body, the dynamic damper 11 built in this rear view mirror 5 The weight 13 also vibrates with a phase delay of half a wave. Therefore, the amplitude of the rear view mirror 5 is 1
3 and become significantly smaller, thus reducing the vibration of the mirror body 10.

Furthermore, when a large external force is applied when driving on a rough road or when the rearview mirror 5 is hit, the amount of deflection of the weight 13 of the dynamic damper 11 increases. In either the left or right direction, the swing is elastically restricted by hitting the stopper 16. Thereby, the leaf spring 12 is protected from being deformed more than necessary.

[Effect of the invention] As described above, according to the invention, the outdoor rear view mirror 5
Since the vibration in the left and right direction of the vehicle is reduced by the damping effect of the dynamic damper 11 built therein, vibration over a wide range can be stably prevented, improving rearward visibility and the like. Since the dynamic damper 11 is built into the rear view mirror 5, it does not spoil the appearance, and rotates together when the angle of the mirror body 10 is changed, so that a constant vibration damping effect can always be obtained. The leaf spring 12 of the dynamic damper 11 deflects only in the left-right direction, and there is little vibration in other directions, so the weight 1
There is no risk of abnormal noise occurring due to collision with the mirror body 6 or the mirror holder 7 of 3.

Furthermore, since excessive vibration of the dynamic damper 11 when driving on a rough road is restricted by the stopper 16, breakage of the leaf spring 12 is avoided, improving durability and preventing problems caused by excessive vibration. do not have.

[Brief explanation of drawings]

Fig. 1 is an overall perspective view showing an embodiment of the present invention, Fig. 2 is an enlarged perspective view of the main parts, Fig. 3 is a sectional view of the same, and Fig. 4 is a cross-sectional view taken from Fig. 3. It is. 1... Front pillar, 2... Mounting bracket, 3, 4... Stay, 5... Rear view mirror, 6... Mirror body, 7... Mirror holder, 8... Mounting base, 9... Screw, 10 ... Mirror body, 11 ... Dynamic damper, 12 ... Leaf spring, 13 ... Weight,
14...Slit, 15...Rivet, 16...
Stoppa, 17...stoppapin.

Claims (1)

[Scope of utility model registration request] In an outdoor rearview mirror in which a mirror holder is installed in the opening of a mirror body that is attached to a stay protruding from the vehicle body, and a mirror body is fixed to the front side of the mirror holder, the back side of the mirror holder opposite to the mirror body. A dynamic damper comprising a weight attached to the lower end of a leaf spring that swings only in the left-right direction is installed, and stoppers are provided on the left and right sides of the installation location of the weight to restrict excessive swing. Rear view mirror.