JPS6047133B2 - Anti-vibration mirror - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an anti-vibration mirror that prevents vibration of a mirror attached to a vehicle, particularly a large motor vehicle.

Mirrors, such as side mirrors and rearview mirrors, are attached to the vehicle body via stays, so they constitute one vibration system, and the mirrors vibrate little by little in response to the vibrations of the engine and the vehicle body.

Even if the rigidity of the stay is increased or the manner in which the mirror is attached to the stay is improved, it is basically impossible to prevent this vibration phenomenon of the mirror since the stay and the mirror are one vibration system. Taking the side mirrors of a large automobile as an example, and explaining the side mirrors in FIG. . It is well known that the mirror M vibrates little by little due to engine vibrations even when the vehicle is running or stopped. Figure 2 is a schematic explanatory diagram of a so-called dynamic damper, and as is well known, the mass m
, and a spring, and a mass m
.

and in spring. The vibrations of the vibration system are allocated by interconnecting different vibration systems consisting of the following and selecting their unique frequencies as appropriate. However, adding another mechanical vibration system m2, m2, to the mirror unnecessarily increases the weight of the mirror, which is not preferred in practice.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide an anti-vibration mirror that can distribute the vibrations of the mirror without providing any special mechanical mass or spring. According to the present invention, a liquid sealing part is provided on the back surface of the mirror, and the liquid sealing part has an opening, and the opening can be closed with a cap, and the sealing liquid is injected leaving a space in the sealing part. There is.

Therefore, the sealed liquid constitutes the mass, the air in the space of the sealed part constitutes the spring, and the sealed liquid and the air in the space can form a suitable vibration system, and its structure is simply by providing the liquid sealed part. Moreover, the liquid sealed portion can constitute a reinforcement body for the mirror.

Therefore, there is no substantial increase in weight and a sufficient distribution effect J can be obtained, making it highly effective as an anti-vibration mirror for automobiles. When implementing the present invention, the amount and material of the sealed liquid and the size of the space may be determined in consideration of the vibration frequency.

5 Hereinafter, embodiments of the present invention will be described with reference to FIGS. 3 and 4.

A rubber 2 is provided on the periphery of the mirror 1 to protect the periphery of the mirror 1. A liquid sealing section, generally indicated by 3, is integrally provided on the back surface of the mirror 1. The liquid sealing portion 3 is provided with an opening 4 for injecting the liquid 5 therein, and the opening 4 is closed with a cap 6. A sealed liquid 5 is sealed in the liquid sealed portion 3 leaving a space 5a, and a stay S is connected to the back surface of the liquid sealed portion 3 via a known mounting universal joint 7. As the sealed liquid 5, for example, water (aqueous solution,
oil, mercury, jelly-like substances), etc. can be used. Since the sealed liquid 5 vibrates in the liquid sealed part 3 during use, the sealed liquid 5 and the air in the space 5a act in the same manner as M2 and k2 to damp the vibration of the mirror 1.

Therefore, by appropriately selecting the amount and type of the sealed liquid 5, small vibrations of the mirror 1 can be prevented.

For reference, an example of a conventionally known mirror mounting device is shown in FIG. 5. In this conventional example, a mounting universal joint 7 is mounted directly on the back of the mirror 1 via, for example, a back panel 8. was connected to Stay S.

Therefore, as is clear from a comparison between FIG. 5 and FIG. Since it can be swung, it has a very large effect when implemented.

Note that, if necessary, a drain cock may be provided at the bottom of the liquid sealing section to facilitate taking out the sealed liquid.

Further, the mounting universal joint 7 is not necessarily provided in the sealed liquid portion, but may be provided directly on the mirror.

[Brief explanation of the drawing]

Fig. 1 is a side view showing a vehicle implementing the present invention, Fig. 2 is an explanatory diagram showing the principle of the invention, Fig. 3 is a front view of the anti-vibration mirror according to the present invention, and Fig. 4 is Fig. 3 FIG. 5 is a cross-sectional view taken along line N--N of FIG. 5, which is similar to FIG. 4 showing a conventional mirror. DESCRIPTION OF SYMBOLS 1... Mirror, 2... Rubber, 3... Liquid enclosure part, 4... Opening, 5... Enclosed liquid, 6... Cap, 7... Universal joint for installation, 8... ··Back panel.

Claims (1)

[Claims] 1. A liquid sealing part is provided on the back of the mirror, the liquid sealing part has an opening, and the opening can be closed with a cap,
An anti-vibration mirror characterized in that an enclosed liquid is injected leaving a space in the enclosed portion.