JPH0225940Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a damper device, and particularly to a damper device applied as an opening/closing device for a lid of an electronic device such as a cassette tape recorder.

[Technical background of the invention and its problems] In the case of electronic equipment, such as a cassette tape recorder, as shown in FIG.
The cassette lid 3 is tiltably supported while being biased in the opening direction, and the damper gear 5 of the damper device 4 attached to the back side of the front cabinet 1 is engaged with the fan-shaped gear 6 provided on the cassette lid 3. In addition, a soft eject device is provided which is configured to gently tilt the cassette lid 3 forward using its base as a fulcrum while being braked by a damper device 4 by operating an eject button (not shown). Lid body 3
This improves the operational feel and prevents the cassette lid 3 from being damaged.

Conventionally, as a damper device 4 used in such a soft eject device, there is an oil damper device as shown in FIG.

That is, this damper device has a damper gear 5
and a half-shaped support member 7 that rotatably holds the damper gear 5 and is attached to the front cabinet 1.
Grease (not shown) is applied to the inside of the half-split storage part 8 formed in the housing part 8, and each support member 7 is stacked so that the flanged rotating shaft 9 protruding from the damper gear 5 is fitted thereinto, and each support member 7 is joined together. The surfaces are bonded together by ultrasonic welding, and the damper gear 5 is rotatably held by the assembled support member 7.

However, when assembling the half-shaped support members 7 by bonding them together by ultrasonic welding or the like, the process of bonding the support members 7 by ultrasonic welding or the like tends to be complicated, which makes the assembly work difficult. Efforts do not improve productivity and tend to increase costs.

In addition, once the support member 7 is bonded, it is difficult to disassemble, so even if the amount of grease applied in the storage portion 8 of the support member 7 is too much or too little, it is difficult to remove or supply additional grease, and the rotation of the support member 7 is difficult. There is a drawback that it is difficult to equalize the torque.

On the other hand, as a damper device with a simple structure, as shown in FIG. A structure in which this is fitted into the support member 10 is also known.

A damper device having such a structure has a damper gear 5.
Manufacturing is simple because it can be assembled by simply fitting the rotating shaft 9 into the supporting member 10, but on the other hand, it does not include a restraining member to prevent the rotating shaft 9 from falling off from the supporting member 10. However, there are problems in that the rotating shaft 9 tends to fall off and grease easily leaks, making it difficult to obtain uniform rotational torque.

Note that if the support member 10 is formed long, it is possible to prevent grease leakage to some extent, but there are disadvantages such as the shape becomes larger and the mounting space for the damper device becomes larger.

[Purpose of the invention] The present invention is intended to solve the problems of conventional damper devices.It is easy to assemble, there is little chance of the damper gear falling out or filler leaking, and it has stable performance. The purpose is to provide an inexpensive damper device with a simple structure.

[Summary of the invention] In order to achieve this object, the present invention provides a damper device in which a rotating member provided on a damper gear is rotatably fitted to a supporting member, in which one of the rotating member or the supporting member is elastic. A locking part is formed on the other side, and a locking part that locks to the elastic locking part is formed, and the elastic locking part and the locking part are locked through elastic deformation of the elastic locking part. be.

[Example of the invention] The details of the invention will be described below. Note that parts common to the conventional example are given the same reference numerals.

4 and 5 are an exploded perspective view and a vertical sectional view for explaining one embodiment of the damper device 4 of the present invention. In these figures, reference numeral 5 designates a damper gear 5 that meshes with the fan-shaped gear 6 of the cassette lid 3 in the ejector shown in FIG. 1, for example, to apply braking when the cassette lid 3 is tilted. A rotating shaft 9 having a smaller diameter than the damper gear 5 is integrally formed on one end surface of the damper gear 5 via a flange 12 having a larger diameter than the damper gear 5.

Further, reference numeral 13 indicates a support member for rotatably supporting the damper gear 5 via the rotation shaft 9.
This support member 13 includes a support cylinder 15 having a bottomed insertion hole 14 into which the rotation shaft 9 of the damper gear 5 is inserted.
It consists of a side plate 16 integrally formed with the support tube 15 so as to sandwich the support tube 15 therebetween, and an elastic locking portion 17 extending from the side plate 16 on the opening side of the insertion hole 14. A locking protrusion 18, which is a portion for locking the above-mentioned flange 12, is provided on the opposing inner surfaces of these elastic locking portions 17 in a protruding manner.

The support member 13 is screwed to the cabinet via a mounting plate (not shown).

By the way, the distance between the opening end surface of the insertion hole 14 and the locking protrusion 18 in the support member 13 described above is such that the flange 12 is in contact with the locking protrusion 18 when the rotation shaft 9 is completely inserted into the insertion hole 14. It is slightly larger than the thickness of the flange 12 so that it is locked with a small gap between it and the opening end surface of the insertion hole 14,
Further, the spacing between the elastic locking portions 17 is also set to be slightly larger than the diameter of the flange 12.

This prevents the smooth rotation of the damper gear 5 from being inhibited by friction between the flange 12 and the members in contact with it.

The rotation shaft 9 of the damper gear 5 is connected to the locking protrusion 1 of each elastic locking portion 17 as shown by diagonal lines in FIG.
8 is inserted into the insertion hole 14 of the support member 13 through the process of being expanded by the flange 12.

Furthermore, a filler 19 such as grease is filled between the rotation shaft 9 and the insertion hole 14, thereby ensuring smoothness between the rotation shaft 9 and the insertion hole 14. There is.

A damper device having such a configuration includes a support member 13
For example, if the damper gear 5 is attached to the cabinet 1 of an electronic device as shown in FIG. can.

Then, the flange 12 of the damper gear 5 is attached to the support member 13 by the locking protrusion 18 of each elastic locking portion 17.
Since the damper gear 5 is held by the support member 13
Since the filler 19 in the insertion hole 14 of the support member 13 is also confined within the insertion hole 14 by the flange 12, leakage is less likely to occur. As a result, smooth and stable rotational torque can be obtained.

FIGS. 6 and 7 are an exploded perspective view and a vertical sectional view showing another embodiment of the present invention.

This embodiment has a structure in which the damper gear 5 is rotatably held by forming an elastic locking portion 17 on the support member 13 and locking it to the flange 12 of the damper gear 5 in the above-described embodiment. On the other hand, an elastic locking portion 17 is provided protrudingly on the side of the flange 12 of the damper gear 5 opposite to the damper gear 5, and the flange 1
The flange 21 formed on the support member 20 is sandwiched between the support member 2 and the elastic locking portion 17.

As described above, in the damper device of the present invention, the elastic locking portion 17 with the locking protrusion 18 can be formed on either the damper gear 5 side or the support member 13, 20 side.

An elastic locking portion 17 is formed on one of the rotating shaft 9 or the support members 13, 20, which are the rotating members of the damper gear 5, and a locking portion, such as a flange 12, 21, that is locked on the elastic locking portion 17 is formed on the other side. The object of the present invention can be achieved by forming the two parts and rotatably locking the two parts.

For example, the present invention can be applied to a damper device having a structure in which a rotary recess is provided in the damper gear and a convex portion formed on the support member 13 is fitted therein.

Furthermore, the support members 13 and 20 can be held by holding means such as a pair of elastic holding pieces formed on the cabinet, and the one-touch installation improves the workability of the installation.

Furthermore, the support members 13, 20 can also be formed integrally with the cabinet.

[Effects of the invention] As explained above, the damper device of the present invention has an elastic locking portion formed on the rotating portion that moves together with the damper gear or a support member that fits this, and a resilient locking portion on the other side. A locking portion is formed to lock, and the rotation member and the support member are rotatably fitted by locking the locking portion through elastic deformation of the elastic locking portion. The structure is simple and compact, and it can be assembled by simply press-fitting the damper gear into the rotating member, so manufacturing is easy and costs can be reduced.

Moreover, since the damper gear is rotatably locked to the support member, it is prevented from coming off from the support member.
Further, filler leakage does not occur, and stable rotational torque can be obtained.

[Brief explanation of the drawing]

FIG. 1 is a partial sectional view showing an electronic device equipped with a damper device, FIGS. 2 and 3 are exploded perspective views showing a conventional damper device, and FIGS. 4 and 5 are one example of the damper device of the present invention. FIGS. 6 and 7 are an exploded perspective view and a longitudinal sectional view showing another embodiment of the damper device of the present invention. 4... Damper device, 5... Damper gear, 7, 1
0, 13, 20... Supporting member, 9... Rotating member (rotating shaft), 12, 21... Locking part (flange),
14...Insertion hole, 17...Elastic locking part, 18...
Locking protrusion.

Claims (1)

[Scope of utility model registration request] In a damper device in which a rotating member provided on a damper gear is rotatably fitted to a supporting member, an elastic locking portion is formed on one of the rotating member or the supporting member, and the elastic locking portion is formed on the other. A damper device comprising: a locking portion that locks the elastic locking portion; and the elastic locking portion and the locking portion locking together through elastic deformation of the elastic locking portion.