JPH035009Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to a cassette crimping mechanism that prevents the cassette from shifting or rattling during loading of the cassette.

[Background technology and its problems]

To prevent the cassette from shifting or wobbling when loading the cassette from the inserted state in which it is inserted into the cassette holder to the cassette-mounted state for recording (playback), it is necessary to secure the cassette in place. be.

FIGS. 1 and 2 are views showing cases in which such a cassette crimping mechanism is provided on the side surface of the cassette holder, and the case in which it is provided on the top surface of the cassette holder, and the cassette holder is indicated by a chain double-dashed line. In this figure, 1 is a cassette holder, 2 is a cassette holding arm whose L-shaped central portion is pivotally supported by the cassette holder 1, 3 is a pressing portion of the cassette holding arm 2, and 4 is the pressing portion 3 that presses the cassette C. A spring is tensioned between the cassette holder 1 and the cassette holding arm 2, which urges the cassette holding arm 2 to press and fix the cassette holder 1 and the cassette holding arm 2.
Reference numeral 5 denotes a release plate with which the cassette holding arm 2 collides to release the cassette pressing force.

When the cassette crimping mechanism is constructed as shown in FIGS. 1 and 2, the cassette holding arm 2 and release plate 5 are in contact with each other in this state, so that the cassette holder 1
Cassette C can be inserted. Then, when the cassette holder 1 is moved in the direction of the arrow by a motor (not shown) and cassette loading is performed, the cassette holding arm 2 and the release plate 5 are disengaged from each other, and the urging force of the spring 4 releases the pressing part 3. Press and fix cassette C. When the cassette C is ejected to release the cassette pressure, the cassette holding arm 2 abuts against the release plate 5, contrary to the above, and the cassette pressure is released.

In other words, the cassette pressing force that presses and fixes the cassette C is the urging force of the spring 4 itself,
In order to release this cassette pressing force, a releasing force greater than the cassette pressing force is required. Furthermore, if the cassette pressing force is increased, the release force will also inevitably be increased. Therefore, by changing the ratio of the length from the pivot point P of the cassette holding arm 2 to the pressing part 3 and the length to the locking point of the spring 4, the cassette pressing force is increased and the biasing force of the spring 4 is decreased. is possible. However, there is a problem in that the cassette holding arm 2 cannot be made larger due to the current trend toward miniaturization, and a motor with a high output must be used in consideration of the release force.

[Purpose of invention]

This invention was made in view of the above points, and provides a cassette crimping mechanism in which the cassette crimping force can be made larger than the release force, and a motor with a small output can be used for cassette loading. .

[Summary of the idea]

In order to achieve the above object, this invention has a cassette holding arm, which has a pressing part for pressing and fixing a cassette at one end, and the other end of the arm is rotatably supported on a cassette holder, and the pressing part is rotated in the cassette insertion direction. One end of the spring that urges the pressing part to bite into the cassette with respect to the cassette ejecting direction in the direction in which the press part runs away from the cassette is engaged and disposed at the intermediate point of the cassette holding arm, and the cassette pressing force is applied. It can be made larger than the release force, and a motor with a small output can be used for loading the cassette.

〔Example〕

FIG. 3 is a side view showing an embodiment of this invention, and FIGS. 4a and 4b are explanatory views of the operation, and the cassette holder is shown by a chain double-dashed line. In this figure, 11 is a cassette holder, 12 is a cassette holding arm provided at one end with a pressing portion 13 for pressing and fixing a cassette C, and the other end is pivotably supported by the cassette holder 11. 14 is the pressing part 13 that presses the cassette C.
A spring is stretched between the cassette holder 11 and the cassette holding arm 12 to urge the cassette holding arm 12 so as to press and fix the cassette holder 11 and the cassette holding arm 12. Reference numeral 15 denotes a release plate with which the cassette holding arm 12 collides to release the cassette pressing force.

Next, the operation will be explained with reference to FIGS. 3 and 4.

In the state shown in FIG. 3, the cassette holding arm 12 is in abutment with the release plate 15, so that the cassette C can be inserted into the cassette holder 11 as shown in FIG. 4a.
Then, when the cassette holder 11 is moved to the right by a motor (not shown) as shown in FIG. Rotating counterclockwise, the pressing portion 13 presses and fixes the cassette C. The urging force of the spring 14 shown in FIG. 4b is applied in the direction in which the pressing part 13 escapes from the cassette C (clockwise) with respect to the cassette insertion direction, and in the direction in which the pressing part 13 bites into the cassette C (in the direction of cassette ejection). counterclockwise). Therefore, the cassette C is pressed and fixed to the cassette holder 11 by the pressing portion 13 without moving in the cassette ejection direction or wobbling.
When the cassette C is ejected, the cassette holding arm 12 collides with the release plate 15, contrary to the above, and in order to release the cassette pressing force, the cassette holding arm 12,
The pressing portion 13 rotates clockwise to the state shown in FIG. 4a. When releasing this cassette pressing force, the length from the pivot point Q of the cassette holding arm 12 to the point where the cassette holding arm 12 abuts against the release plate 15 is the length from the pivot point Q to the locking point of the spring 14. Since it is longer than the spring 14, the release force can be smaller than the biasing force of the spring 14, and a motor with a small output can be used.

Note that the release force can be further reduced by reducing the angle θ between the straight line L in FIG. 4b and the line connecting the pivot point Q and the pressing portion 13.

5 and 6 are a side view and a plan view, respectively, showing other embodiments of this invention. In the case of FIG. 5, the cassette C is placed on the upper plate of the cassette holder 11, and in the case of FIG. is pressed and fixed to the side plate of the cassette holder 11, and the desired effect can be expected as in FIG. 3.

Although the above embodiment has been described in the case where the cassette holding arm 12 and the release plate 15 abut each other, the pressing portion 13 may abut against the release plate 15.

[Effect of idea]

As explained above, the cassette crimping mechanism of this invention uses a spring to move the cassette holding arm provided with the pressing part, so that the pressing part moves away from the cassette with respect to the cassette insertion direction, and in the direction of biting into the cassette with respect to the cassette ejection direction. Since the cassette is energized, the cassette pressing force can be increased compared to the releasing force, and there is an advantage that a motor with a small output can be used.

[Brief explanation of the drawing]

Figures 1 and 2 are views showing the case where the conventional cassette crimping mechanism is provided on the side surface and the top surface of the cassette holder, respectively. 4a and 4b are explanatory diagrams of the operation, and FIGS. 5 and 6 are a side view and a plan view, respectively, showing other embodiments of this invention. In the figure, 11 is a cassette holder, 12 is a cassette holding arm, 13 is a pressing part, 14 is a spring,
15 is a release plate.

Claims (1)

[Scope of utility model registration request] The other end of the cassette holding arm, which is provided with a pressing part that presses and fixes the inserted cassette at one end, is rotatably supported on a cassette holder so as to be rotatable about a predetermined rotation axis, and the pressing part One end of a spring that biases the pressing part in a direction in which the pressing part bites into the cassette with respect to the cassette ejecting direction in a direction in which the press part escapes from the cassette is locked at an intermediate point of the cassette holding arm, and the other end of the spring is The other end of the cassette holding arm of the cassette holder is fixed at a point a predetermined distance from a pivot point on which the cassette holder is pivoted, and the fixing point and the pivot point are arranged so that they move together with the movement of the cassette holder. A cassette crimping mechanism.