JPH1055587A - Cassette loading device for video cassette recorder - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the deviation of a worm from a worm wheel even when repulsive force is generated between the worm and the worm wheel by meshing a counter part worm wheel with the worm. SOLUTION: In the device, the worm wheel 22 is meshed with the worm 21 of a driving motor 20. Then, a cam gear 24 is connected via an intermediate gear 23 to the worm wheel 22. Then, a lever 13 to be moved in the longitudinal direction by rotating this cam gear 24 has a 1st rack part 14 at one end part and a 2nd rack part 15 meshed with a loading arm 30 at the other end part. Then, the device is equipped with the counter part worm wheel 122 meshed with the worm 21 on the side opposite to the worm wheel 22.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a video cassette recorder (hereinafter, referred to as "VCR"), and more particularly, to a VCR cassette loading device capable of preventing a worm of a drive motor from deviating from a worm gear. About.

[0002]

2. Description of the Related Art FIG. 1 is a schematic plan view of a conventional cassette loading device used for a VCR. Such a conventional cassette loading apparatus includes a drive motor 20 having a shaft provided with a worm 21 and a worm gear 2 meshing with the worm 21 of the drive motor 20.
2 and an intermediate gear 23 that rotates with the worm gear 22
And a cam gear 24 meshing with the intermediate gear 23, and an elongated lever 13 movably attached to a lower portion of the deck 10.

The lever 13 has at one end a first rack portion 14 meshing with the cam gear 24, and at the other end a second rack portion 15 meshing with a loading arm 30 supporting the cassette holder 11. The lever 13 is moved in the longitudinal direction by the rotation of the cam gear 24 to rotate the loading arm 30, so that the tape cassette Ca in the cassette holder 11 is loaded into the VCR or executed.

In such a conventional cassette loading apparatus, in the executing mode of the VCR, the lever 13 may stop at a predetermined stop position due to the rotational inertia of the drive motor 20. A stopper 11 is provided. The stopper 11 forcibly stops the lever 13 and the worm gear 22 while rotating by the rotational inertia of the drive motor 20. As a result, there is a disadvantage that a repulsive force is generated between the worm and the worm gear, and the worm may deviate from the worm gear.

[0005]

SUMMARY OF THE INVENTION It is, therefore, a primary object of the present invention to provide a cassette loading device for a VCR which prevents the worm of the drive motor from deviating from the worm gear.

[0006]

According to one embodiment of the present invention, there is provided a cassette loading device used in a video cassette recorder, comprising:
A drive motor having a worm, a worm gear meshing with the worm of the drive motor, an intermediate gear rotating with the worm gear, a cam gear meshing with the intermediate gear, and one end meshing with the cam gear. A lever having a rack portion, which is moved in the longitudinal direction by the rotation of the cam gear; And a counter part worm gear.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A cassette loading apparatus according to a preferred embodiment of the present invention will be described in detail with reference to FIGS. In the drawings, the same reference numerals indicate the same elements.

The cassette loading device according to the present invention comprises a drive motor 20 having a shaft provided with a worm 21, a worm gear 22 meshing with the worm 21 of the drive motor 20, and an intermediate gear 2 rotating with the worm gear 22.
3, a cam gear 24 meshing with the intermediate gear 23,
An elongate lever 13 movably attached to a lower portion of the deck 10;
Counterpart worm gear 122 meshing with
And

The lever 13 has, at one end, a first rack portion 14 that meshes with the cam gear 24, and at the other end, a second rack portion 15 that meshes with a loading arm 30 that supports the cassette holder 11. The lever 13 is moved in the longitudinal direction by the rotation of the cam gear 24 to rotate the loading arm 30, so that the tape cassette Ca in the cassette holder 11 is loaded into the VCR or executed.

The stopper 11 is disposed below the deck 10 to prevent the lever 13 from moving above a predetermined position. The stopper 11 forcibly stops the lever 13 and the worm gear 22 while rotating by the rotational inertia of the drive motor 20.

[0011]

According to the present invention, even if a repulsive force is generated between the worm and the worm gear, the counterpart worm gear meshing with the worm suppresses the displacement of the worm and the worm deviates from the worm gear. To prevent.

[Brief description of the drawings]

FIG. 1 is a schematic plan view of a VCR incorporating a conventional cassette loading device.

FIG. 2 is a schematic side view of a VCR incorporating a conventional cassette loading device.

FIG. 3 is a schematic plan view of a VCR incorporating a cassette loading device according to the present invention.

FIG. 4 is a sectional view taken along line II of FIG. 3;

[Explanation of symbols]

 13 Lever 21 Worm 22 Worm gear 24 Cam gear 122 Counterpart worm gear

Claims (2)

[Claims] 1. A cassette loading device used for a video cassette recorder, comprising: a drive motor having a worm; a worm gear meshing with a worm of the drive motor; an intermediate gear rotating with the worm gear; A cam gear meshing with the intermediate gear; a lever having a rack portion meshed with the cam gear at one end, and a lever that moves in a longitudinal direction by rotation of the cam gear; A counterpart worm gear that meshes to prevent the worm of the drive motor from deviating from the worm gear. 2. The cassette loading device according to claim 1, further comprising a stopper for stopping the lever at a predetermined stop position in an executing mode of the VCR.