JPH0738773U - Rotating damper - Google Patents

Abstract

(57) [Summary] [Purpose] The purpose is to mechanically brake the rotation of a rotor without using a viscous fluid such as oil or grease. [Structure] The braking plate portion 3-1 of the rotor 3 rotating on the supporting portion 2 protruding from the center of the lower plate 1-1 of the dish-shaped housing 1 is radially protruded from the outer periphery of the rotating shaft portion 3-2, and The entire radiating portion 7 or its radiating end side is formed thin. Then, the thin portion of the radiating portion 7 is formed into a curved shape that is pressed against the inner surface (lower plate 1-1) of the dish-shaped housing 1 to form the curved portion 5.
The curved plate 5 is pressed against the inner surface of the dish-shaped housing 1 by applying elastic force to the brake plate portion 3-1 that rotates on the lower plate 1-1 of the dish-shaped housing 1, and the brake plate. Part 3-1
The rotation of the rotor 3 consisting of the rotating shaft portion 3-2 standing upright from the center of the is mechanically braked.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a rotary damper which is used for a cassette lid, a knob lid of a television and other rotating parts, and a sliding part for braking their rotation.

[0002]

[Prior art and its problems]

 Conventionally, as this type of rotary damper, for example, one disclosed in Japanese Patent Laid-Open No. 5-52232 is known. By the way, in this conventional rotary damper, rotary braking is performed by viscous fluid such as oil or grease being contained inside the dish-shaped housing. Therefore, there is a possibility that the viscous fluid contained in the dish-shaped housing may leak to the outside from the outer wall of the housing and the cap due to rotation resistance and aging.

Therefore, conventionally, in order to prevent the viscous particles from leaking to the outside, it has been necessary to fix the dish-shaped housing and the cap by high-frequency welding to completely seal the viscous fluid inside the dish-shaped housing. Therefore, the conventional rotary damper takes time and effort to manufacture, which has been an obstacle such as high cost.

[0004]

[Problems to be solved by the device]

 The present invention has been made in view of such conventional circumstances, and provides a newly improved rotary damper that can mechanically brake the rotation of a rotor without using a viscous fluid such as oil or grease. The purpose is to do.

[0005]

[Means for achieving the object]

 The technical means taken by the present invention to achieve the above-mentioned object are a dish-shaped housing, a braking plate portion which rotates on a supporting portion projecting from a lower plate center of the dish-shaped housing, and a center of the braking plate portion. It is a rotary damper composed of a rotor consisting of a rotary shaft portion standing upright from above, and a cap that closes the inside of the dish-shaped housing from above. The braking plate portion of the rotor is radially projected from the outer periphery of the rotary shaft portion. However, the entire radiating portion or its radiating end side is formed thin, and the radiating portion is formed into a curved or bent shape that is pressed against one or both of the inner surface of the dish-shaped housing and the inner surface of the cap. The feature is that elastic force is applied to the bent portion.

[0006]

[Work]

 Thus, according to the above-mentioned technical means of the present invention, the braking plate portion is rotatably provided inside the dish-shaped housing, so that the radiating portions of the braking plate portion have elastic force. Friction resistance is generated by the pressure contact force (elastic force) of the curved or bent portion against one or both of the inner surface of the dish-shaped housing and the inner surface of the cap, and brakes the rotation of the rotor.

[0007]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings. FIGS. 1 and 2 show a first embodiment of a rotary damper, which is a dish-shaped housing 1 and a circular plate 1-1 of the dish-shaped housing 1. A rotor 3 composed of a braking plate portion 3-1 that rotates on a support portion 2 that protrudes from the center of the rotor, and a rotating shaft portion 3-2 that stands up from the center of the braking plate portion 3-1, and the dish-shaped housing. It is composed of a cap 4 that closes the inside of the rotor 1 from above, and the rotation of the rotor 3 is caused by the pressure contact force (elastic force) of the curved portion 5 of the braking portion 3-1, which will be described later, to the lower plate 1-1 of the dish-shaped housing 1. Is mechanically braked.

As is well known, the dish-shaped housing 1, the rotor 3, and the cap 4 are integrally molded products made of a desired material such as plastic, and the outer peripheral rising wall 1-2 of the dish-shaped housing 1 and the outer periphery of the cap 4 are formed. Engagement irregularities 6 are provided on the hanging wall 4-1 so as to be closely fixed to each other by a fitting or screwing method.

The braking plate portion 3-1 mechanically measures the rotational braking of the rotor 3 by the pressure contact force of the dish-shaped housing 1 to the lower plate 1-1, and the radial direction from the outer periphery of the rotating shaft portion 3-2 (illustrated example). In this case, the radiating portion 7 is formed to have a thin shape, and the radiating portion 7 except the protruding base portion is formed in a thin shape. An elastic force is applied to the curved portion 5.

By the way, the plastics that make up the rotor 3 are thermoplastics, such as polyethylene terephthalate (PBTP), polyacetal (POM), polyamide (PA) (nylon 6.10.12.6/6.6/10.6/11), polyethylene (PE). ), Polypropylene (PP), polymethylmethacrylate (PMMA), polystyrene (PS), AS resin (crylonitrile-styrene resin), ABS resin (acrylonitrile-butadiene-styrene resin), polycarbonate (PS), polyethylene Menterephthalate (PETP) and the like can be mentioned.

Therefore, according to the rotary damper having the above-described detailed structure of the first embodiment, the braking plate portion 3-1 of the rotor 3 is rotatably provided inside the dish-shaped housing 1. The frictional resistance is generated by the pressure contact force of the curved portion 5 having the elastic force provided on each radiating portion 7 of the control plate portion 3-1, with respect to the lower plate 1-1 of the dish-shaped housing 1, so that the rotor 3 is rotated by the machine. To brake.

FIGS. 3 to 4 show a second embodiment of the rotary damper in which the configuration of the braking plate portion 3-1 is changed. In the second embodiment, the braking plate portion 3-1 is provided so as to project radially. The radiating portion 7 of the whole is formed into a thin shape, and the radiating end side thereof is formed into a bent shape that is pressed against the lower plate 1-1 of the dish-shaped housing 1 to impart elastic force to the bent portion 8. To do. Then, by pressing the radiating portion 7 excluding the bent portion 8 with the hanging portion 9 that projects downward from the top 4-2 of the cap 4, the pressure contact force of the bent portion 8 to the lower board 1-1 is promoted. The pressure contact force is prevented from decreasing and the frictional resistance can be maintained stably for a long period of time.

FIGS. 5 to 6 also show a third embodiment of the rotary damper in which the configuration of the braking plate portion 3-1 is also changed. In the third embodiment, the braking plate portion 3 is provided so as to project radially. -1 is formed in a thin shape only on the radiating end side of the radiating portion 7, and at the same time, is separately formed in a curved shape toward both the lower plate 1-1 of the dish-shaped housing 1 and the top plate 4-2 of the cap 4. At the very least, an elastic force is applied to the curved portions 10 so that the rotation braking of the rotor 3 is mechanically achieved.

7 to 8 show a fourth embodiment of the rotary damper in which the configuration of the braking plate portion 3-1 is also changed, and the fourth embodiment is the same as the third embodiment as shown in the drawings. It is a modified example of the embodiment in which the bending directions of both bending portions 10 described in detail are reversed.

FIGS. 9 to 10 show a fifth embodiment of the rotary damper in which the configuration of the braking plate portion 3-1 is also changed. In the fifth embodiment, the braking plate portion 3 is provided to project radially. -1 is formed thinly only on the radiating end side of the radiating part 7, and at the same time, it is separately formed into a bent shape toward the peripheral rising part 1-2 of the dish-shaped housing 1 and elastic force is applied to the both bent parts 11. Is provided, whereby rotation braking of the rotor 3 is mechanically achieved.

[0016]

[Effect of device]

 Since the rotary damper of the present invention is constructed as described above, it has the following operational effects.

By rotatably arranging the braking plate portion inside the dish-shaped housing, the inner surface of the dish-shaped housing and the inner surface of the cap of the curved or bent portion having elastic force provided on each radiating portion of the braking plate portion Friction resistance is generated by the pressure contact force (elastic force) against one or both, and the rotation of the rotor can be braked.

Therefore, according to the rotary damper of the present invention, the braking plate having the curved or bent portion in the inside of the dish-shaped housing that is pressed against one or both of the inner surface of the dish-shaped housing and the inner surface of the cap. Since it is configured so that the rotation of the rotor is mechanically braked by making the portion internal, it is not necessary to use a viscous fluid such as oil or grease. That is, since the complicated and troublesome fixing work of fixing the dish-shaped housing and the cap by high-frequency welding or the like as in the past is not necessary at all, the assembly is very simple and the manufacturing cost is low. .

[Submission date] February 17, 1994

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be corrected] 0003

[Correction method] Change

[Correction content]

[0003] Therefore, in order for the conventional prevent external leakage of the viscous flow body, and allowed to fix the dish-shaped housing and the cap by high-frequency welding it was necessary to seal the viscous fluid completely in the interior of the dish-shaped housing. Therefore, the conventional rotary damper takes time and effort to manufacture, which has been an obstacle such as high cost.

[Procedure Amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0007

[Correction method] Change

[Correction content]

[0007]

【Example】

An embodiment of the present invention will be described below with reference to the drawings. FIGS. 1 and 2 show a first embodiment of a rotary damper, which is a dish-shaped housing 1 and a circular plate 1-1 of the dish-shaped housing 1. A rotor 3 composed of a braking plate portion 3-1 that rotates on a support portion 2 that protrudes from the center of the rotor, and a rotating shaft portion 3-2 that stands up from the center of the braking plate portion 3-1, and the dish-shaped housing. It is composed of a cap 4 that closes the inside of the rotor 1 from above, and the rotation of the rotor 3 is caused by the pressure contact force (elastic force) of the curved portion 5 of the braking plate portion 3-1, which will be described later, to the lower plate 1-1 of the dish-shaped housing 1. Is mechanically braked.

[Brief description of drawings]

FIG. 1 is a vertical sectional view showing a first embodiment of a rotary damper according to the present invention.

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

FIG. 3 is a vertical sectional view showing a second embodiment of the rotary damper of the present invention.

4 is a cross-sectional view taken along the line IV-IV in FIG.

FIG. 5 is a vertical sectional view showing a third embodiment of the rotary damper of the present invention.

6 is a cross-sectional view taken along the line VI-VI in FIG.

FIG. 7 is a vertical sectional view showing a fourth embodiment of the rotary damper of the present invention.

8 is a cross-sectional view taken along the line VIII-VIII in FIG.

FIG. 9 is a vertical sectional view showing a fifth embodiment of the rotary damper of the present invention.

10 is a cross-sectional view taken along the line XX of FIG.

[Explanation of symbols]

1 ... Dish-shaped housing 1-1 ... Housing low plate 2 ... Support part 3 ... Rotor 3-1 ... Braking plate part 3-2 ... Rotating shaft part 4 ... Cap 4-2 ... Cap top plate 5, 10 ... Curved Part 7 ... Radiating part 8, 11 ... Bent part

Claims (1)

[Scope of utility model registration request] 1. A rotor comprising a dish-shaped housing, a braking plate portion that rotates on a support portion that projects from a lower plate center of the dish-shaped housing, and a rotating shaft portion that stands up from the center of the braking plate portion. A rotary damper composed of a cap that closes the inside of the dish-shaped housing from above, wherein the braking plate portion of the rotor is provided so as to project radially from the outer periphery of the rotation shaft portion, and the entire radial portion or the radial end portion thereof The rotation is characterized in that the side is formed thin and a curved or bent shape is formed in pressure contact with one or both of the inner surface of the dish-shaped housing and the inner surface of the cap, and an elastic force is applied to the curved or bent portion. Damper.