JPH0725892Y2 - Damper mechanism for cassette holder - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a cassette holder damper mechanism suitable for a tape recorder, and more particularly to a cassette holder damper mechanism using a gear damper.

[Prior Art] An example of a damper mechanism used in a conventional tape recorder is shown in FIG.

In the figure, reference numeral 1 denotes a cassette holder, which is rotatably supported by a shaft 2 erected on the chassis and is urged clockwise by a spring (not shown).

The tape cassette is inserted in a state where the cassette holder 1 is rotated clockwise and opened, and is pushed into a position shown in the drawing and locked by a lock mechanism.

When the cassette holder 1 is unlocked, the cassette holder 1 is rotated clockwise by a spring force to open, and a gear damper is used to suppress the releasing speed at that time.

That is, the segment gear 3 fixed to the cassette holder 1 meshes with the gear 4 rotatably supported by the chassis, and the reaction force of the torque for rotating the gear 4 suppresses the releasing speed of the cassette holder.

The torque required to release the cassette holder is large in the initial stage, and if the cassette holder is continuously urged by the torque, the gear damper configured as described above will release the cassette holder too quickly, degrading the quality of the equipment. There's a problem.

As a solution to the problem, there is one shown in FIG.

In this damper mechanism, the release speed of the cassette holder 1 is suppressed by the engagement of the gear 6 rotatably supported by the cassette holder 1 and the segment gear 5 fixed to the chassis, but the segment gear 5 has a toothless portion. Since the cassette holder 1 does not mesh with the gear 6 at the initial rotation of the cassette holder 1, the initial rotation load of the cassette holder 1 is reduced and the cassette holder 1 is driven by a small biasing force.

[Problems to be Solved by the Invention] In the conventional device shown in FIG. 3, when the gear 6 and the segment gear 5 enter into mesh with each other, the crests of the teeth may come into contact with each other, resulting in a smooth releasing operation. Was not done.

The present invention was made in view of the above points,
The purpose is that the release operation is smooth,
It is to provide a damper mechanism for a cassette holder that does not increase the release speed too much.

[Means for Solving the Problems] In the damper mechanism of the cassette holder of the present invention, a gear that is provided coaxially with the cassette holder and that rotates when the cassette holder is released is rotatably supported by the chassis and meshes with the gear. In the damper mechanism of the cassette holder that suppresses the release speed of the cassette holder by the reaction force of the torque received when rotating the gear, the gear provided coaxially with the cassette holder is rotatable as a separate body from the cassette holder. The gears are supported and abut on the cassette holder at two abutting portions in the two rotational directions, and play is provided between the abutting portions.

[Operation] According to the damper mechanism of the cassette holder of the present invention,
At the initial stage of releasing the cassette holder, the gear provided coaxially with the cassette holder and the contact portion of the cassette holder are apart from each other, so that the load of releasing the cassette holder is small and the biasing force of the cassette holder can be reduced. it can.

Therefore, the releasing speed of the cassette holder does not increase too much.

[Embodiment] A damper mechanism of a cassette holder according to an embodiment of the present invention will be described with reference to FIG.

In the figure, parts having the same functions as those shown in the conventional example are designated by the same reference numerals, and detailed description thereof will be omitted.

The segment gear 7 is rotatably supported by a shaft 2 that supports the cassette holder 1.

Protrusions 1a and 1b are provided on the cassette holder 1 so as to sandwich the segment gear 7 at intervals, and the segment gear 7 is constantly meshed with a gear 8 rotatably supported by the chassis.

In the above configuration, when closing the cassette holder,
The segment gear 7 is pushed by the protrusion 1b and rotates counterclockwise, and the protrusion 1b and the segment gear 7 are in contact with each other.

That is, when the segment gear 7 is closed, the segment gear 7 and the protrusion 1a are separated from each other.

Therefore, the segment gear 7 does not rotate in the initial stage of the release of the cassette holder 1, and there is no torque load due to the meshing of the segment gear 7 and the gear 8.

Even if the cassette holder 1 is biased with a weak torque, the initial rotation operation of the cassette holder 1 is possible, and by doing so, the releasing speed of the cassette holder 1 can be suppressed.

[Advantage of Invention] According to the damper mechanism of the cassette holder of the present invention,
Since there is no damper load in the initial stage when the cassette holder comes out of the mechanism with the largest load, the release biasing force is reduced and a high-quality cassette holder release is realized.

[Brief description of drawings]

FIG. 1 is a front view showing a damper mechanism of a cassette holder according to an embodiment of the present invention, FIG. 2 is a front view showing an example of a damper mechanism of a conventional cassette holder, and FIG. 3 is a conventional cassette holder. It is a front view showing an example of a damper mechanism. 1 ... Cassette holder, 1a, 1b ... Protrusion, 2 ... Shaft, 3 ... Segment gear, 4 ... Gear, 5 ... Segment gear,
6 ... Gear, 7 ... Segment gear, 8 ... Gear.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Ichigen Okamoto 2-17-5 Shibuya, Shibuya-ku, Tokyo Kenwood Co., Ltd. (72) Hirotaro Sahara 2-17-5 Shibuya, Shibuya-ku, Tokyo Shareholder Kenwood, Inc. (72) Inventor, Seiji Iizuka, 2-17-5, Shibuya, Shibuya-ku, Tokyo Kenwood, Inc. (56) References

Claims (1)

[Scope of utility model registration request] 1. A cassette holder which is provided coaxially with the cassette holder and which rotates with the releasing operation of the cassette holder by a reaction force of a torque received when rotating a gear which is rotatably supported by the chassis and meshes with the gear. In the damper mechanism of the cassette holder for suppressing the releasing speed of the cassette holder, a gear provided coaxially with the cassette holder is rotatably supported as a separate body from the cassette holder, and the gear rotates in two directions on the cassette holder. A damper mechanism for a cassette holder, characterized in that the abutting portions are abutted at different abutting portions, and a play is provided between the abutting portions.