JPH0590681U - Rotating damper - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a rotary damper that does not wobble even when vertical or rotational loads are applied and that can be used in a stable state even when axial load of the rotor shaft is applied. The purpose is to [Constitution] In the rotary damper, its casing is
At least a pair of mounting claws 1b elastically engaged with a mounting hole C1 formed in the device to be used, and a detent boss 5c inserted in the hole C2 formed in the device to be integrated. In addition, the ribs 5d and 5e whose tip contacts the equipment used are integrally formed with the casing.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a rotary damper for quietly and gently opening and closing a cover plate rotatably attached to an audio device such as a cassette tape recorder and a video tape recorder.

[0002]

[Prior Art]

 The rotary damper used in the above-described device is generally attached to a chassis of a device used such as the audio device by using a fixing member such as a screw. However, in order to use a fixing member such as a screw, a tool such as a screwdriver is required in the manufacturing process, the work for mounting is troublesome, and the number of parts increases, resulting in a product cost. There was a problem of rising prices.

Therefore, as a solution to the above problems, a rotary damper as shown in FIG. 5 has been developed. That is, in FIG. 5, A is a rotary damper body, and as is well known, a casing A1 including a housing in which a viscous fluid filling portion is formed and a cap that covers the opening of the housing, and A rotor shaft A2 having a shaft portion protruding from the cap is fixed to the rotor shaft A2, which is rotatably accommodated in a filling portion of the housing together with a viscous fluid, and is rotatably attached to a device B to be used. And a gear A3 meshed with rack teeth (not shown) of the arm of the cover plate. Further, the casing A1 is integrally formed with a mounting claw A4 which is elastically engaged with a mounting hole B1 formed in the device B to be used.

Then, in order to mount the rotary damper A to the device B to be used, the mounting claw A4 extending from the casing A1 is inserted into the mounting hole B1 against the elasticity and engaged with the rear surface of the device B to be used. By In such a rotary damper A, since it is not necessary to use a fixing member such as a screw for mounting, the mounting work is simple and the facility cost is low, and the cost increase due to the increase in the number of parts is suppressed. There is an advantage that you can.

[0005]

[Problems to be solved by the device]

 However, in the case where the mounting claw A4 is formed on the casing A1, since the rotary damper A is supported only by the pair of mounting claws A4, when the arm is rotated with respect to the casing A1 via the gear A3. When a load is applied due to the generated vertical or rotational vibrations, the elastic mounting claw A4 may bend and wobble, causing disengagement between the arm rack teeth and the gear A3. is there. Further, if a load is applied to the rotary damper A in the axial direction of the rotor shaft A2, the mounting claw A4 and the mounting hole B1 may be disengaged from each other, resulting in poor stability.

The present invention solves the above-mentioned problems and does not cause wobbling even when load is applied to the rotary damper in the vertical direction or the rotational direction, and the axial load of the rotor shaft in the rotary damper is also prevented. It is intended to provide a rotary damper that can be used in a stable state even when a load is applied.

[0007]

[Means for Solving the Problems]

 The rotary damper according to the present invention achieves the above-mentioned object. A casing including a housing having a viscous fluid filling portion formed therein and a cap covering an opening of the housing, and a viscous fluid filling portion of the housing. A rotary damper, which is rotatably accommodated together with a fluid and comprises a rotor shaft having a shaft portion protruding from the cap, is elastically engaged with the casing through a mounting hole formed in a device to be used. It is characterized in that at least a pair of attachment claws and a rotation-stop boss that is inserted into a hole formed in the device to be used are integrally formed. Further, in the above rotary damper, a rib whose tip abuts against the used device when attached to the used device is integrally formed with the casing.

[0008]

Embodiment An embodiment of the rotary damper A according to the present invention will be described below with reference to the drawings. 1 to 3, reference numeral 1 denotes a housing having a filling portion 1a filled with a well-known viscous fluid such as grease or oil, and a claw 1b1 is provided at a front end of the housing at two opposite positions on the opening side. The mounting claw 1b having elasticity is formed.

Reference numeral 2 denotes a rotor shaft in which a disk portion 2a is housed in a filling portion 1a of the housing 1 together with a viscous fluid 3, and the rotor shaft includes a shaft portion 2b formed in a non-circular shape. A well-known gear 4 is attached to the shaft portion 2b.

The reference numeral 5 is arranged in the opening of the housing 1 via sealing members 6, 7 such as O-rings, and the projections 1c formed at a plurality of locations on the outer peripheral surface of the housing 1 have holes 5a on the outer peripheral surface. It is a cap that is fixed to the housing 1 by being fitted into the housing 1. A center hole 5b for inserting the shaft portion 2b of the rotor shaft 2 is formed in the center portion of the cap. Then, the cap 5 and the housing 1 constitute a casing.

Further, on the surface of the cap 5, in a state where the cap 5 is attached to the housing 1, a rotation stopper having a height lower than that of the attachment claw 1b is provided at a position corresponding to the attachment claw 1b. Boss 5c and a rib 5d formed continuously from the boss 5c and having a height lower than that of the boss 5c, and a rib 5e having the same height as the rib 5d and the rib 5d. It is formed at a right angle.

Then, in the state where the disk portion 2a of the rotor shaft 2 is housed together with the viscous fluid 3 in the filling portion 1a of the housing 1, and then the sealing members 6 and 7 are arranged in the opening portion of the housing 1, The hole 5a of the cap 5 is fitted into the projection 1c of the housing 1 while inserting the central hole 5b of the cap 5 into the shaft portion 2b. As a result, the cap 5 and the housing 1 are integrated in a watertight state.

Then, the rotary damper A configured as described above is attached to the chassis C of a device to be used such as an audio device. This attaching method will be described below with reference to FIG. In FIG. 4, a pair of mounting holes C1 into which the mounting claws 1b of the housing 1 are inserted are formed in the chassis C of the equipment to be used, and holes C2 are formed at positions close to the mounting holes C1. Has been formed.

An arm D for supporting a lid plate (not shown) that can be opened and closed with respect to the equipment used is rotatably attached to the chassis C by a support shaft D1. A rack D2 is formed at the base of the rack.

To mount the rotary damper A on the chassis C thus formed, the mounting claw 1b is inserted into the mounting hole C1 and the boss 5c is inserted into the hole C2. When the mounting claw 1b is pushed in completely against the elasticity, the claw 1b1 is engaged with the chassis C and is fixed so as not to come out.

In this state, the boss 5c is also completely fitted in the hole C2, and the three ribs 5d and 5e are in contact with the front surface of the chassis C. In this way, the rack D2 of the arm D meshes with the gear 4 in the state where the rotary damper A is fixed, and when the arm D rotates, the rotational force is applied to the rotor shaft 2 via the gear 4. Join. Therefore, the braking force generated when the rotor shaft 2 rotates is applied to the arm D, and the lid plate associated with the arm D performs the opening / closing operation quietly and smoothly.

By the way, when the arm D rotates, even if a load is applied to the rotary damper A via the gear 4 in the rotational direction, the boss 5c is fitted into the hole C2, so that the rotary damper A is The ribs 5d and 5e do not rotate, and the ribs 5d and 5e are in contact with the surface of the chassis C even when a load is applied to the housing 1 so that the rotation damper A moves to the chassis C side. There is no.

Further, even if a load acts in a direction in which the rotary damper C is separated from the chassis C, since the claw 1b1 of the mounting claw 1b is engaged with the chassis C, the movement in this direction is also prevented. That is, the rotary damper A is not displaced with respect to the chassis C by an external force from any direction.

[0019]

[Effect of the device]

 INDUSTRIAL APPLICABILITY As described above, according to the present invention, at least a pair of mounting claws that are elastically engaged with mounting holes formed in a device to be used and a hole to be formed in the device are used in a predetermined casing. The rotation preventing boss is integrally formed, and the mounting claw and the boss are engaged with the hole of the device to be used. Therefore, even if a vertical or rotational load is applied to the rotary damper, it will not wobble or disengage from the equipment in use. In addition, since the casing is integrally formed with a rib whose tip abuts against the equipment used, it is not displaced even with an axial load, and therefore the rotary damper is further fixed. It becomes possible to maintain a stable state.

[Brief description of drawings]

FIG. 1 is a front view of a rotary damper of the present invention.

FIG. 2 is a sectional view taken along line XX of the above.

FIG. 3 is a sectional view taken along line YY in FIG.

FIG. 4 is a perspective view showing a state where the rotary damper of the present invention is fixed to a chassis of a device to be used.

FIG. 5 is a side view showing a state in which a conventional rotary damper is fixed to a chassis of a device to be used.

[Explanation of symbols]

 1 Housing 1a Filling part 1b Mounting claw 2 Rotor shaft 2b Shaft part 3 Viscous fluid 4 Gear 5 Cap 5c Boss 5d Rib 5e Rib C Chassis C1 mounting hole C2 hole of equipment used

Claims (2)

[Scope of utility model registration request] 1. A casing including a housing having a viscous fluid filling portion formed therein and a cap covering an opening of the housing; and a viscous fluid rotatably accommodated in the filling portion of the housing, In a rotary damper composed of a rotor shaft having a shaft portion projecting from a cap, the casing includes at least a pair of mounting claws elastically engaged with a mounting hole formed in a device to be used,
A rotary damper characterized by integrally forming a rotation preventing boss to be inserted into a hole formed in the device to be used. 2. The rotary damper according to claim 1, wherein a rib whose tip abuts against the used device is integrally formed with the casing when the rotary damper is attached to the used device. Rotating damper to do.