JP2002213512A - Rotary damper - Google Patents

Abstract

PROBLEM TO BE SOLVED: To cut down the number of components and miniaturize a rotary damper. SOLUTION: This rotary damper has a body case 10 having teeth 11a formed on its outer periphery at a fixed interval and an engagement hole 21 with which a fixed shaft is engaged, and it is also equipped with a shaft body 20 provided along the axial center of the body case 10, and a rotor protrusively formed on the outer periphery of the shaft body 20 and provided in the body case 10 filled with viscous liquid.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary damper.

[0002]

2. Description of the Related Art Conventionally, a rotary damper is usually used with a main body case fixed at a predetermined position of an object to be controlled or a support thereof. For example, in the rotary damper shown in FIG. The case 100 is fixed. Also,
In the rotary damper shown in FIG.
The claw portion 130 is provided so as to protrude from the outer periphery of the claw portion 1.
The body case 100 is fixed by engaging the control object 30 with a predetermined portion of the control object or its support.

[0003]

However, in the above-mentioned rotary damper, since the flange and the claw are provided, the external dimensions of the main body case are inevitably large, and it is difficult to reduce the size. In addition, those having a flange require a screw or the like for attachment, and there is a problem that the attachment takes time and labor. In addition, since these rotary dampers are used in combination with a rack connected to an object to be controlled, an end 140 of a rotating body rotatably provided in the main body case 100 and protruding outside the main body case 100 includes: It is necessary to attach the pinion 150 that engages with the rack, and there is a problem that the number of parts increases and the manufacturing cost increases.

The present invention has been made in view of the above points, and an object of the present invention is to provide a rotary damper which can be easily mounted on an object to be controlled or its support, and can reduce the number of parts and reduce the size. Make it an issue.

[0005]

In order to solve the above-mentioned problems, according to the present invention, a main body case having teeth formed at regular intervals on an outer periphery and a fixing shaft are engaged. A shaft body provided along an axis of the main body case, and a protrusion formed on an outer periphery of the shaft body;
And a rotor provided in the main body case filled with a viscous liquid. In the present invention according to claim 2, the engaging hole of the shaft body is formed so as to penetrate along the axis, and a flat portion corresponding to the outer shape of the shaft is formed on a part of the inner peripheral surface. The rotary damper according to claim 1, wherein the rotary damper is formed.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in more detail based on embodiments shown in the drawings. FIG. 1 is a plan view showing a rotary damper according to one embodiment of the present invention, and FIG. 2 is a cross-sectional view along the line AA in FIG. As shown in these drawings, the rotary damper according to the present embodiment includes a main body case 10, a shaft body 20, and a rotor 30.

The main body case 10 further includes a case main body 11 and a cap 12 for closing the opening of the case main body 11. The case body 11 is formed in a substantially cylindrical shape with a bottom, and teeth 11a are formed on the outer periphery thereof at regular intervals. A hole 11c penetrating along the axis is formed in the bottom wall 11b, and a protrusion 11d protruding from the inner surface thereof toward the opening is formed (see FIGS. 2 and 3). In addition,
A ring-shaped sealing member 40 for preventing the viscous liquid filled in the main body case 10 from leaking outside is disposed between the protruding portion 11d and a shaft body 20 described later.

The cap 12 is formed in a disk shape, and has a hole 12a penetratingly formed along the axis, and a sealing member 4 formed on the back side for preventing liquid leakage.
It has a groove in which 0 is disposed.

The shaft body 20 is formed in a substantially cylindrical shape having an engagement hole 21 formed therethrough along the axis. The engagement hole 21 can be engaged with a fixing shaft provided on the main body of the control target or its support, and by engaging with the shaft, the rotation of the shaft 20 is prevented. Any shape may be used as long as the shape is formed. In the present embodiment, on a part of the inner peripheral surface,
It has a flat portion 21a corresponding to the outer shape of the shaft, and is formed in a substantially D-shape when viewed from a plane.

In the shaft 20, one end 20a is inserted into the hole 11c of the case main body 11, and the other end 20b is inserted into the hole 12a of the cap 12, respectively. It is provided along. By providing the shaft body 20 in this manner, a space 50 is formed in the main body case 10, and the space 50 is filled with a viscous liquid such as silicone oil (see FIGS. 2 and 3).

The rotor 30 is formed so as to protrude from the outer periphery of the shaft body 20, has a substantially L-shaped cross section, and is disposed in the space 50 filled with the above-mentioned viscous liquid.

Next, the operation of the rotary damper according to this embodiment will be described. As shown in FIG. 4, the rotary damper is provided on a support 60 for an object to be controlled (for example, a support frame of an ashtray mounted on an automobile) in an engagement hole 21 formed in a shaft 20. By inserting the fixing shaft 61 therethrough, it is attached to its support (support frame) 60. At this time, the flat portion 60a formed on a part of the outer peripheral surface of the shaft 61 and the engagement hole 2 formed on the shaft body 20 are formed.
The engaging hole 21 is engaged with the shaft 60 so that the one flat portion 21a faces. Thereby, rotation of the shaft body 20 and the rotor 30 is prevented.

The main body case 10 is arranged so that teeth 11a formed on the outer periphery of the case main body 11 are engaged with a rack (not shown) connected to a control object (for example, an ashtray in the above example). When the rack slides with the linear movement of the object (ash tray), the shaft 20
And around the rotor 30. At this time, the main body case 10 tends to rotate as the rack slides. However, the rotational force is attenuated by the resistance of the viscous liquid filled in the gap between the main body case 10 and the rotor 30, so that the speed is slow. Will rotate. Thereby, the rotary damper of the present embodiment can delay the linear operation of the control object (ash tray).

As described above, according to the rotary damper of the present embodiment, the main body of the controlled object or the supporting body thereof is operated only by inserting the shaft 61 into the engaging hole 21 without using screws or the like for mounting. Can be easily mounted, and the mounting time can be greatly reduced as compared with the related art. Further, since the shaft body 20 and the rotor 30 are fixed as described above and the main body case 10 rotates around them to exert a predetermined braking force, the main body case is fixed as in the related art. There is no need to provide flanges or claws. For this reason, it is possible to reduce the size, and it is possible to manufacture with a small material cost. Further, since the main body case 10 is configured to have teeth 11a formed at regular intervals on its outer periphery and functions as a pinion, there is no need to provide a separate pinion as in the conventional case, and the number of parts can be reduced. Can be. In addition, the rotary damper of the present invention is not limited to a linear damper that operates like an ashtray mounted on an automobile, and for example, a control object that rotates and operates like a lid that closes the entrance of a CD of a CD player. Of course, it is applicable also to.

[0015]

As described above, the rotary damper of the present invention has a main body case having teeth formed at regular intervals on the outer periphery, and an engaging hole with which a fixing shaft is engaged. A shaft is provided along the axis of the main body case, and a rotor is formed on the outer periphery of the shaft body and is provided in the main body case and is filled with a viscous liquid. Therefore, it is easy to attach the object to be controlled or the support to the support, and it is possible to reduce the number of parts and to reduce the size.

[Brief description of the drawings]

FIG. 1 is a plan view showing a rotary damper according to one embodiment of the present invention.

FIG. 2 is a sectional view taken along the line AA of FIG. 1;

FIG. 3 is an enlarged view of a portion B in FIG. 2;

FIG. 4 is a diagram for explaining a method of mounting the rotary damper according to the embodiment.

5A and 5B are views showing a conventional rotary damper, wherein FIG. 5A is a plan view and FIG. 5B is a front view.

FIGS. 6A and 6B are views showing a conventional rotary damper, where FIG. 6A is a front view and FIG. 6B is a plan view.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Main body case 11 Case main body part 11a Teeth 12 Cap 20 Shaft 21 Engagement hole 21a Flat surface part 30 Rotor 40 Sealing member 50 Space part 60 Support body of controlled object 61 Shaft

Claims (2)

[Claims] 1. A main body case having teeth formed at regular intervals on an outer periphery thereof, and a shaft body having an engagement hole with which a fixing shaft is engaged, and provided along an axis of the main body case. And a rotor protruding from the outer periphery of the shaft and provided in the main body case filled with a viscous liquid. 2. An engaging hole of the shaft body is formed so as to penetrate along an axis, and a flat portion corresponding to an outer shape of the shaft is formed on a part of an inner peripheral surface. The rotary damper according to claim 1, wherein: