JP2568160Y2 - Rotary damper - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary damper which is used for a cassette lid, a knob for a television and other rotating parts to brake the rotation thereof.

[0002]

2. Description of the Related Art Conventionally, as this kind of rotary damper, for example, one disclosed in Japanese Patent Application Laid-Open No. 5-52232 is known. By the way, this conventional rotary damper is used as a braking member for braking the rotation of the rotating shaft.
Since a viscous fluid such as oil or grease is used, the viscous fluid contained in the dish-shaped housing may leak to the outside from the outer walls of the housing and the cap due to rotational resistance and aging.

Therefore, conventionally, in order to prevent the viscous fluid from leaking to the outside, it has been necessary to fix the dish-shaped housing and the cap by high frequency welding and completely seal the viscous fluid inside the dish-shaped housing. Therefore, the conventional rotary damper from take time and effort to the manufacture, had a disorder such as high cost. Further, a viscous solid having high viscosity is not used as a braking member in the conventional rotary damper.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of such circumstances as described above, and has an excellent braking function by using a viscous solid made of silicon gel for braking a rotor. It is an object of the present invention to provide a rotary damper improved so that it can be manufactured and provided at low cost without requiring any other fixing work by high frequency welding or the like.

[0005]

In order to achieve the above-mentioned object, the technical measures taken by the present invention include a dish-shaped housing, a brake plate rotating on a bottom plate of the dish-shaped housing, and a brake plate of the brake plate. A rotor consisting of a rotating shaft part rising from the center, an O-ring fitted to the outer periphery of the rotating shaft part of the rotor, a cap for closing the inside of the dish-shaped housing from above, and an inside of the dish-shaped housing. in the rotary damper which is composed of the endogenous be allowed braking member, said braking member is Siri
A viscous solid made of congel, wherein the viscous solid is sealed in a dish-shaped housing.

[0006]

According to the technical means of the present invention, since the sticky rice cake-like viscous solid contained in the dish-shaped housing has a high viscosity, the rotational resistance during the rotation of the rotor and the external resistance due to aging. The rotation of the rotor is agitated by the rotation of the rotor, and the rotation of the rotor is braked.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. A rotary damper includes a dish-shaped housing 1, a brake plate 2 which rotates horizontally on a bottom plate 1a of the dish-shaped housing 1, and a rotary damper. A rotor 4 comprising a rotating shaft 3 standing upright from the center of the brake plate 2; an O-ring 5 fitted on the outer periphery of the base of the rotating shaft 3 of the rotor 4;
6 for closing the inside of the housing from above and the dish-shaped housing 1
And a rice cake-like viscous solid 7 placed in the inside thereof, and the rotation of the rotor 4 is braked by utilizing the properties of the viscous solids 7 which are stirred and merged by the rotation of the rotor 4.

[0008] Dish-shaped housing 1, rotor 4, cap 6
As is well known, is a one-piece molded product made of a desired material such as plastic, and the outer peripheral rising wall 1b of the dish-shaped housing 1.
Engaging irregularities 8 are provided which are fitted or screwed into the outer hanging wall 6a of the cap 6 and the outer peripheral hanging wall 6a. Further, the rotor 4 has its braking plate portion 2 configured in the shape of a plurality of blades.

As the viscous solid 7, the rotor 4 having high viscosity is used.
Silicon gel which exerts a braking effect of braking the rotation of the rotor 4 by being agitated during the rotation of the rotor 4 is exemplified.

Since the sticky viscous solid 7 has a high viscosity, it does not leak out due to rotational resistance and aging when the rotor 4 rotates. In addition, due to the property of being stirred and merged by the rotation of the rotor 4, a braking effect of braking the rotation of the rotor 4 is exhibited.

[0011]

[Effects of the Invention] Since the rotary damper of the present invention is constructed as described above, the following effects are obtained.

A highly viscous silicon is placed inside the dish-shaped housing.
A braking member made of a viscous solid such as ngel is enclosed inside to brake the rotation of the rotor, so that the braking member exhibits an excellent braking function and leaks to the outside due to rotational resistance during rotation of the rotor and aging. Nothing. Therefore, according to the rotary damper of the present invention, when the braking member exhibits an excellent braking function, the rotor can be stopped at a desired rotation angle, and when the dish-shaped housing and the cap are fixed by high frequency welding or the like as in the conventional case. Since the troublesome and time-consuming fixing work is not required at all, the assembling becomes very simple, and it can be manufactured and provided at low cost.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing an embodiment of a rotary damper of the present invention.

FIG. 2 is a cross-sectional view taken along the line II-II of FIG.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Dish-shaped housing 2 ... Braking plate part (blade) 3 ... Rotating shaft part 4 ... Rotor 5 ... O-ring 6 ... Cap 7 ... Viscous solid

Claims (1)

(57) [Scope of request for utility model registration] 1. A rotor comprising a dish-shaped housing, a braking plate rotating on a bottom plate of the dish-shaped housing, and a rotating shaft rising from the center of the braking plate, and a rotating shaft of the rotor. In a rotary damper composed of an O-ring fitted on the outer periphery, a cap for closing the inside of the dish-shaped housing from above, and a braking member provided inside the dish-shaped housing, the braking member is A rotary damper comprising a viscous solid made of silicon gel, wherein the viscous solid is sealed in a dish-shaped housing.