JPH0725348U - Rotary damper - Google Patents

Abstract

(57) [Summary] [Purpose] A rotary damper that requires less mounting space, improves appearance, and is easy to assemble. In a rotary damper 11 having a rotating body that rotates in a housing 14 filled with silicone oil, a fitting hole 21 is provided in a rotating shaft 20 of the rotating body, and a lid 2 is provided.
The end portion of the opening / closing shaft 24 of No. 3 can be directly inserted into the fitting hole 21.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a rotary damper used for attenuating the operation speed of an opening / closing mechanism used for a cup holder, an ashtray, a small case, a remote control case, an operation panel for home electric appliances and the like.

[0002]

[Prior art]

 As shown in FIG. 8, a conventional rotary damper 1 has a pinion gear 4 on a shaft 3 projecting from the center of a rotating body in a housing 2 filled with viscous oil. Therefore, for example, when applied to the lid opening / closing part of the case, as shown in FIG. 7, the rotary damper 1 is attached to the case body side, and the fan-shaped gear 5 that meshes with the pinion gear 4 is attached to the lid 6 side. Must be installed.

[0003]

[Problems to be solved by the device]

 However, in the above-described conventional rotary damper, since the rotation center of the pinion gear 4 and the rotation center of the fan gear 5 must be separated by a predetermined length, a large mounting space is often required. Also, if the gear 4 of the damper and the gear 5 on the lid side are visible, the appearance is bad, and if they are not visible, the structure becomes complicated and this contributes to an increase in manufacturing cost. Therefore, the present invention seeks to provide a rotary damper that requires less mounting space and has a good appearance in the mounted state.

[0004]

[Means for Solving the Problems]

 The present invention has been proposed in view of the above, and in a rotary damper having a rotating body that rotates in a housing filled with a viscous fluid, a fitting hole is provided in the central portion of the rotating body, and a damped operation such as a lid is performed. The end of the body shaft can be directly fitted into the fitting hole.

[0005]

[Action]

 Since the center of rotation of the rotating body and the center of rotation of the actuated body to be damped coincide with each other due to direct fitting between the fitting hole and the shaft, a gear space for transmitting damping force is unnecessary.

[0006]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings. The rotary damper 11 shown in FIG. 1 has a shell 12 made of plastic and having a recessed portion, and a shell 13 having a circular lid shape that closes the opening of the shell 12 butted together to form a housing 14, and the housing 14 is made of plastic. The rotating body 15 is placed in a rotating manner, filled with a viscous fluid 16 made of, for example, silicone oil, and sealed between the shells 12 and 13 and the rotating body 15 by O-rings 17, 18 and 19. The viscous fluid 16 is prevented from flowing out. Note that 12a and 12b are mounting ears.

The difference between the rotary damper 11 and the conventional one is the configuration of the central portion of the rotary body 15. That is, conventionally, a rotary shaft is generally provided so as to project from the center of the rotating body 15 and penetrates through a shaft hole formed in the housing to project to the outside, but in the present invention, it is formed at the central portion of the rotating body 15. The rotary shaft 20 is configured as a hollow shaft having a fitting hole 21, and the end of the rotary shaft 20 is set to be flush with the outer surface of the housing 14 or slightly projected. The fitting hole 21 is formed into a substantially oval square hole having a corner portion on the inner peripheral surface thereof so that the rotational force can be transmitted.

The rotating body 15 is configured to include the rotating shaft 20 and a disk-shaped blade 15 a extending outward from the outer peripheral surface of the rotating shaft 20. When the rotating body 15 is additionally rotated in the housing 14, the blade 15a receives the resistance of the silicone oil, and the resistance force causes a damping torque to the rotating shaft 20.

In the rotary damper 11 having such a configuration, as shown in FIGS. 2 and 5, the end portion of the opening / closing shaft 24 that joins the case 22 and the lid 23 to the fitting hole 21 of the rotary shaft 20. Both can be combined by inserting. That is, in the rotary damper 11 according to the present invention, the end portion of the opening / closing shaft 24 of the lid 23, which is the actuating member to be attenuated, is directly fitted into the fitting hole 21 in the central portion of the rotating body 15. Both can be combined. The end portion of the opening / closing shaft 24 is formed in a sectional shape complementary to the through hole (square hole) 21 of the rotating shaft 20.

As shown in FIG. 6, when the rotary damper 11 is directly connected to the shaft 24 of the lid 23 that opens and closes the opening 25 of the case 22, the rotary damper and the lid are separated from each other as compared with the conventional rotary damper. Since there is no need to interpose a gear between them and the formation of a gear is not necessary, not only is the space not wasted that much, but the assembly is easy. That is, the rotary damper 11 is attached to the case 22, the hole of the lid 23 is aligned with the hole of the case 22, and then the shaft 24 is passed through to assemble. Since the end of the opening / closing shaft 24 is formed in a prismatic shape and has a shape complementary to the shape of the fitting hole 21 of the damper 11, the two are fitted in a state in which they cannot idle. Accordingly, the rotational movement of the opening / closing shaft 24 is directly transmitted to the damper 11 and the damping operation is performed. Also, since the gears in the conventional rotary damper are not present, the appearance is improved.

In the above embodiment, the fitting hole 21 of the rotary shaft 20 of the rotary body 15 is a through hole, but it is sufficient if the end of the shaft 24 can be inserted and fitted in a non-idle state. Therefore, it can be configured as a bottomed hole with one end closed, and the shape of the hole is not limited to a substantially oval shape, and may be, for example, a square hole or a serration fitting hole.

[0012]

[Effect of device]

 As described above, according to the present invention, it is not necessary to attach or form a gear in the conventional rotary damper, and therefore, the assembling becomes easier. Further, since there is no gear in the conventional rotary damper, the appearance is improved and the space can be saved.

[Brief description of drawings]

FIG. 1 is a perspective view of a rotary damper according to an embodiment of the present invention.

FIG. 2 is a perspective view showing a connection state between the rotary damper and the lid shown in FIG.

FIG. 3 is a sectional view of a rotary damper according to an embodiment of the present invention.

FIG. 4 is a front view of the rotary damper shown in FIG.

5 is a schematic diagram showing a connection state between the rotary damper and the lid shown in FIG. 1. FIG.

6 is a perspective view of a case showing an application example of the rotary damper of FIG. 1. FIG.

FIG. 7 is a perspective view showing a mounting state of a conventional rotary damper and a lid.

FIG. 8 is a perspective view of a conventional rotary damper.

[Explanation of symbols]

 11 Rotating Damper 12 Shell 12a, 12b Mounting Ear 13 Shell 14 Housing 15 Rotating Body 15a Blade 16 Viscous Fluid 17, 18, 19 O Ring 20 Rotating Shaft of Rotating Body 21 Through Hole 22 Case 23 Lid 24 Opening / Closing Shaft

Claims (1)

[Scope of utility model registration request] 1. A rotary damper having a rotating body that rotates in a housing filled with a viscous fluid, wherein a fitting hole is provided in a central portion of the rotating body, and an end portion of a shaft of a damping actuated body is provided in the fitting hole. A rotary damper characterized by being able to be directly inserted into.