JPS633012Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an opening/closing device for a cassette tape holder.

Conventionally, this kind of device consists of connecting an oil damper or an air damper via a gear or an arm to a cassette tape holder that is constantly given a rotational force in the opening direction by a spring or the like, and then attaching the cassette tape holder to When opening, the friction effect of the damper is applied to the cassette tape holder via the gear or arm, so that the cassette tape holder is opened slowly.

However, these conventional devices have a complicated structure and a large number of component parts, resulting in high costs and extremely difficult manufacturing.

The present invention has been devised by paying attention to the drawbacks of the conventional device, and aims to provide an inexpensive opening/closing device for a cassette tape holder by minimizing the number of component parts.

Hereinafter, one embodiment of the present invention will be described in detail with reference to the accompanying drawings.

Of the accompanying drawings, Fig. 1 is a perspective view of a cassette tape holder equipped with an opening/closing device according to the present invention, and Fig. 2 is an explanatory diagram of the assembly of such a cassette tape holder and a main body of a device such as a tape recorder. In these figures, reference numeral 1 denotes a cassette holder, which generally includes a main body 2, and a cassette tape support plate 4 which is vertically installed on the lower surface of the main body 2 at an appropriate interval to form a cassette tape support groove 3. and 5, and a cassette tape support plate 4
A pivot shaft 6 is provided on the outer surface of the rear end of the cassette tape support plate 5, and a semicircular circumscribed arc surface 7a that is made of a curved rib and is concentric with the pivot shaft 6 is provided on the outer surface of the rear end of the cassette tape support plate 5. The forming shaft portion 7 is integrally formed.

Further, a spring hook opening 8 is provided at the rear end of the cassette tape support plate 5.

Reference numeral 9 denotes a main body of a device such as a tape recorder, which has a support hole 12 on its upper surface from which reel stands 10 and 11 are exposed at the bottom, and a rear end of one of the inner wall sides of this support hole 12. is provided with a pivot port 13 for pivotally supporting the pivot shaft 6, and a semicircular inscribed arc surface 14 concentric with the pivot port 6 at the other rear end.
The bearing part 14 has a bearing part a.

The cassette tape holder 1 and the device main body 9 formed as described above are manufactured by applying a highly viscous oil (grease, etc.) to the inscribed circular arc surface 14a of the bearing portion 14, and then attaching the pivot shaft 6. Piston opening 13
The shaft portion 7 is inserted into and supported by the bearing portion 14.
By fitting and inserting the cassette tape holder 1 into the device body 9, the cassette tape holder 1 can be assembled so that it can pivot to open and close on the device body 9. In this state, the coil spring 15 can be attached to the spring hook 16 provided in the spring hook opening 8 and the device body 9. By suspending the cassette tape holder 1 between the cassette tape holder 1 and the cassette tape holder 1, the cassette tape holder 1 can be always biased in the opening direction.

The main body 9 of the device is provided with a well-known locking means (not shown) for keeping the cassette tape holder 1 in the closed state.

The present invention is constructed as described above, and its opening and closing operations will be explained next.

Figure 3 shows the closed state of the cassette tape holder 1, and in this state the coil spring 1
The spring force 5 acts in the direction of arrow A, and a force in the opening direction acts on the cassette tape holder 1, but the cassette tape holder 1 is locked by the locking means and kept in the closed state. ing.

Note that, based on the spring force of the coil spring 15 in the direction of arrow A, the circumscribed arc surface 7a of the shaft portion 7 moves toward the bearing portion 1.
It is in pressure contact with the inscribed circular arc surface 14a of No. 4 as shown by arrow B (see FIG. 5).

Then, when the locking means is released from the closed state, the cassette tape holder 1 rotates in the direction of arrow C using the pivot shaft 6 and the shaft portion 7 as fulcrums under the force of the coil spring 15, and opens (fourth (see figure).

However, in this case, the circumscribed arc surface 7 of the shaft portion 7
A and the inscribed circular arc surface 14a of the bearing section 14 are coated with oil and fat, and the circumscribed circular arc surface 7a is in pressure contact with the inscribed circular arc surface 14a as described above, so that the shaft section 7 is in contact with the inside of the bearing section 14. Since the cassette tape holder 1 is rotated at a low speed, the opening operation of the cassette tape holder 1 is smooth and slow.

When closing the cassette tape holder 1 next time, it is preferable to rotate the cassette tape holder 1 in the direction of arrow D against the coil spring 15 from the open state shown in FIG.

Of course, in the completely closed position, the cassette tape holder 1 is maintained in this closed state by the locking means.

Incidentally, in the above embodiment, the structure of the portion that produces the friction effect is constituted by the shaft portion 7 and the bearing portion 14, each of which is made of a curved rib, but the structure is not limited to this.

In short, at least the shaft portion and the bearing portion are in a mating relationship with each other having a contact area larger than the contact area between the pivot shaft 6 and the pivot port 13, and a highly viscous oil or fat is interposed between the two. If the following three conditions are satisfied between the shaft portion and the bearing portion: the above-mentioned coil spring, etc. exerts an appropriate pressure contact force between the two, the structure is acceptable. It does not matter whether the rigid shaft portion and bearing portion are provided on the cassette tape holder or on the main body of the device.

Further, in the above embodiment, the shaft portion 7 and the bearing portion 14 are provided only on one side edge of the cassette tape holder, but it goes without saying that they may be provided on the other side edge as well.

As described above, the present invention pivots the cassette tape holder to the main body of the device by pivoting the shaft part provided on one of these parts to the bearing part provided on the other.
Further, highly viscous oil is interposed between the shaft portion and the bearing portion, and the shaft portion is brought into pressure contact with the bearing portion by the urging force of the urging means that applies an opening force to the cassette tape holder. Therefore, it is an excellent idea that has a much simpler structure, fewer parts, and can be manufactured at a lower cost than conventional ones.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of a cassette tape holder equipped with an opening/closing device according to the present invention, Fig. 2 is an explanatory diagram when assembling the same cassette tape holder to the main body of the device, and Figs. 3 and 4 show the same cassette tape holder. FIG. 5 is a side view of the main part showing the state in which the holder is closed and opened to the main body of the device, and FIG. 5 is an enlarged view of the main part of FIG. 3. 1: Cassette tape holder, 7: Shaft, 9:
Equipment main body, 14: Bearing part.

Claims (1)

[Scope of utility model registration request] A pivot means for pivoting the cassette tape holder to the device body is provided with a shaft portion provided on either one of the device body or the cassette tape holder, and a shaft portion provided on the other side that is pivoted through a highly viscous oil or fat. A cassette tape holder, characterized in that the cassette tape holder is formed with a bearing part, and the shaft part is pressed into contact with the bearing part by the biasing force of a biasing means that applies an opening force to the cassette tape holder. Switchgear.