JP2589468Y2 - 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 for quietly and gently opening and closing a cover plate and the like rotatably mounted on audio equipment such as a cassette tape recorder and a video tape recorder.

[0002]

2. Description of the Related Art In general, a rotary damper used for the above-mentioned equipment is attached to a chassis of a used equipment such as the audio equipment by using a fixing member such as a screw. However, with the order to use the fixing member such as screws are required tool such as a subscription-menu driver in the manufacturing process, a troublesome work for attaching and the cost of the product is soaring increasing number of components There was a problem of doing.

In order to solve the above problem, a rotary damper as shown in FIG. 5 has been developed. That is, in FIG. 5, A is a rotary damper over, as is known, a casing A1 constituted by cap covering the opening of the filling portion is formed a housing and the housing of the viscous fluid therein, A rotor shaft A2 rotatably housed in the filling portion of the housing together with the viscous fluid, and a shaft portion protruding from the cap; and a lid fixed to the rotor shaft A2 and rotatably attached to the device B to be used. A gear A3 meshed with rack teeth (not shown) of the plate arm. Furthermore, elastically engaging to <br/> Ru mounting claw A4 into a mounting hole B1 formed in the use device B is formed integrally with the casing A1.

In order to attach the rotary damper A to the equipment B to be used, a mounting claw A4 extending from the casing A1 is used.
It was inserted into the attachment hole B1 against the elastic performed by Rukoto to engage the rear surface of the used equipment B. In such a rotary damper A, there is no need to use a fixing member such as a screw for mounting, so the mounting operation is simple, the equipment cost is small, and the increase in cost due to an increase in the number of parts is suppressed. There is an advantage that can be.

[0005]

However, in the case where the mounting claws A4 are formed on the casing A1, the rotary damper A is supported only by the pair of mounting claws A4. When a load is applied due to vertical or rotational vibrations generated when the arm rotates, the elastic mounting claws A4 bend and wobble, causing the gear teeth of the arm to mesh with the gear teeth A3. It may come off. When a load in the axial direction of the rotor shaft A2 is applied to the rotary damper A, the mounting claw A
4 may be disengaged from the mounting hole B1, and there is a problem of lack of stability.

SUMMARY OF THE INVENTION The present invention solves the above-mentioned problems, and does not wobble even when a vertical load or a rotational load is applied to the rotary damper, and also applies a load in the rotary damper in the axial direction of the rotor shaft. An object of the present invention is to provide a rotary damper that can be used in a stable state.

[0007]

Rotation damper of the present invention According to an aspect of the present invention to achieve the object, formed by a cap covering the opening portion of the housing and the housing of the filling portion is formed of a viscous fluid therein In a rotary damper composed of a casing and a rotor shaft rotatably housed together with a viscous fluid in a filling portion of the housing and having a shaft protruding from the cap, before the shaft of the rotor shaft protrudes. > Symbol on one surface of the casing, is inserted and a plurality of mounting claws which elastically engage the plurality of intake <br/> with holes formed in the equipment used, a plurality of holes formed in said use device double for the detent that
Number of bosses and the plurality of mounting claws are provided in the plurality of mounting holes.
Engaged with the plurality of bosses inserted into the plurality of holes.
In this state, the tip abuts on the used device and
A plurality of ribs for securing a predetermined interval therebetween are integrally formed. In the above rotary damper, characterized by being formed integrally with the ribs on the casing and the boss.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 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 for filling a well-known viscous fluid 3 such as grease, oil, or the like.
Mounting nails 1b is formed that is.

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

Numeral 5 is disposed at the opening of the housing 1 through sealing members 6 and 7 such as O-rings. by fitting to Rukoto a cap that is fixed to the housing 1, the rotor shaft 2 at its central portion
A central hole 5b for inserting the shaft portion 2b is formed. The cap 5 and the housing 1 form a casing.

On the surface of the cap 5, when the cap 5 is mounted on the housing 1, a detent is provided at a position corresponding to the mounting claw 1b so as to have a lower height than the mounting claw 1b. A boss 5c is formed continuously with the boss 5c, a rib 5d having a lower height than the boss 5c is formed, and a rib 5e having the same height as the rib 5d is formed.
Are formed at right angles to the rib 5d.

Thus, the disk portion 2a of the rotor shaft 2 is accommodated in the filling portion 1a of the housing 1 together with the viscous fluid 3, and then the sealing members 6, 7 are arranged in the opening of the housing 1. while through a central hole 5b of the cap 5 to the shaft portion 2b to the hole 5a of the cap 5 Ru is fitted a projection 1c of the housing 1. Thereby, the cap 5 and the housing 1 are integrated in a watertight state.

The rotary damper A constructed as described above is mounted on a chassis C of a device to be used such as an audio device. This mounting 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 device to be used in the up-down direction, and holes C2 are provided at positions close to the mounting holes C1. Is formed.

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

In order 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 fully pushed against the mounting claw 1b the elastic pawl 1b1 is fixed so as not come out to engage the chassis C.

In this state, the boss 5c is also connected to the hole C2.
Three ribs 5d and 5
e contacts the front surface of the chassis C. When the rotary damper A is fixed in this manner, the gear 4
The rack D2 of the arm D meshes with the arm D.
When the rotor rotates, a rotational force is applied to the rotor shaft 2 via the gear 4. Therefore, a braking force generated when the rotor shaft 2 rotates is applied to the arm D, and the cover plate associated with the arm D opens and closes quietly and smoothly.

When the arm D rotates, even if a rotational load is applied to the rotary damper A via the gear 4, the rotary damper A is rotated because the boss 5c is fitted into the hole C2. The ribs 5d and 5e are in contact with the surface of the chassis C, so that the rotary damper A does not move toward the chassis C even if a load is applied to the housing 1 in the pushing direction. .

Further, even if a load is applied in a direction of separating the rotary damper A from the chassis C, the claw 1b1 of the mounting claw 1b
Is engaged with the chassis C, so that 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]

As described above, according to the present invention, a plurality of mounting claws elastically engaging with a plurality of mounting holes formed in a device to be used are provided on one surface of a predetermined casing. Multiple detents inserted into multiple holes formed
And boss engaging said plurality of mounting claws to the plurality of mounting holes
The plurality of bosses are inserted into the plurality of holes.
Between the device and the tip of the device
It's also integrally formed a plurality of ribs for securing a predetermined gap. Therefore, even if loads in the vertical and rotational directions are applied to the rotary damper, it may fluctuate,
Rather than name be dislodged from the equipment used, the load in the axial direction
The rotary damper is fixed because it does not displace
Can be kept in a stable state . Further, the rib is formed integrally with the casing and the boss .
Thus, the strength of the boss can be secured, and the rotation damper can be fixed more stably.

[Brief description of the drawings]

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

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

FIG. 3 is a sectional view taken along line YY in FIG. 1;

FIG. 4 is a perspective view showing a state in which 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]

 Reference Signs List 1 housing 1a filling portion 1b mounting claw 2 rotor shaft 2b shaft portion 3 viscous fluid 4 gear 5 cap 5c boss 5d rib 5e rib C chassis of equipment used C1 mounting hole C2 hole

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁶ , DB name) F16F 9/00-9/54 F16F 7/00-7/14 G11B 33/02

Claims (2)

(57) [Scope of request for utility model registration] 1. A a casing is <br/> composed cap covering the opening portion of the housing and the housing of the filling portion is formed of a viscous fluid therein, rotatable with the viscous fluid-filled portion of the housing Wherein the casing has a shaft portion of the rotor shaft protruding, the rotor damper being configured to include a rotor shaft having a shaft portion protruding from the cap.
On one surface and a plurality of bosses for detent is inserted and a plurality of mounting claws which elastically engage the plurality of mounting holes formed in the equipment used, a plurality of holes formed in said use device and,
The plurality of mounting claws engage with the plurality of mounting holes, and
With the bosses inserted in the holes,
A predetermined time between the used device and the used device
A rotary damper, wherein a plurality of ribs for securing a gap are integrally formed. 2. The rotary damper according to claim 1, wherein the rib is formed integrally with the casing and the boss .