JPH08167267A - Tape cassette - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a tape cassette that allows smooth movement in and out of a tape cassette drive and does not weaken the locking force of a slider. [Structure] A slider body 2 is slidably provided on a cassette body, which is made up of an upper half and a lower half 1 in which a magnetic tape is housed, and a torsion spring 4 is wound around a pin 3 projecting from the inner surface of the lower half 1. In the tape cassette in which 41 is inserted and the elastic restoring force of the torsion spring 4 always urges the slider 2 forward of the cassette body, the winding portion 41 of the torsion spring 4 is attached to the pin 3. It is characterized in that the winding portion pressing portion 31 is formed on the upper part of the pin 3 while being fitted and the winding portion pressing portion 31 holds down the winding portion 41 to hold the winding portion 41 horizontally. .

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tape cassette, and more particularly, to a tape cassette which allows a tape cassette drive to smoothly enter and exit and in which the locking force of a slider is not weakened.

[0002]

2. Description of the Related Art In a tape cassette, a slider is slidably provided in a cassette body containing a magnetic tape, and a torsion spring is provided in a lower half of the cassette body.

In such a tape cassette, as shown in FIG. 4, the torsion spring 4 is used.
Has a winding portion 41 inserted into a pin 3 projecting from the surface of the lower half 1 on the upper half side, and one arm portion 42 of the torsion spring 4 is provided on the slider 2 for locking the slider. The other arm 43 is locked to the lower half locking part 11 provided on the lower half 1, and the elastic restoring force of the torsion spring 4 causes the slider 2 to move the slider 2 to the cassette. Always urges forward of the body.

When assembling a tape cassette,
In order to facilitate the work of inserting the winding portion 41 of the torsion spring 4 into the pin 3, the torsion spring 4 has an inner diameter of the winding portion 41 which is equal to the inner diameter of the winding portion 41.
Is formed larger than the outer diameter of the pin 3 for inserting the.

[0005]

However, in the conventional tape cassette as described above, as shown in FIG. 5, the slider 2 is positioned so as to be in contact with the lower surface of the lower half 1, and the slider engaging portion is provided. Since 21 is positioned below the winding portion 41 of the torsion spring 4 (on the back surface side of the cassette), the winding portion 41 is formed by the gap between the inside of the winding portion 41 and the pin 3 so that the torsion spring is 4 inclines with respect to the inserted pin 3. As a result, the slider 2 is biased not only in the closing direction (forward direction) of the slider 2 but also in the downward direction, and the slider 2 bends downward as shown by the dotted line in FIG. The part gets caught when inserting into the tape cassette drive,
There is a risk that the cassette will not move in and out smoothly.
Further, due to the downward bending of the slider 2, the slider 2 and the lower half 1 are slightly separated,
The locking force of the slider 2 may be weakened.

Therefore, it is an object of the present invention to avoid the possibility that the slider will bend downward and separate from the lower half, so that the tape cassette drive can be smoothly moved in and out, and the slider locking force may be weakened. Not to provide a tape cassette.

[0007]

According to the present invention, a slider 2 is slidably provided on a cassette body composed of an upper half and a lower half 1 in which a magnetic tape is housed, and the slider is projectingly provided on an inner surface of the lower half 1. In the tape cassette in which the winding portion 41 of the torsion spring 4 is fitted into the pin 3 and the elastic restoring force of the torsion spring 4 constantly urges the slider 2 forward of the cassette body. The winding portion 41 is fitted into the pin 3 and the winding portion pressing portion 31 is formed on the upper portion of the pin 3, and the winding portion 41 is pressed by the winding portion pressing portion 31 to fix the winding portion 41. The above object is achieved by providing a tape cassette characterized by being held horizontally.

[0008]

According to the tape cassette of the present invention, since the winding portion of the torsion spring is not tilted, the elastic restoring force of one arm portion of the torsion spring locked to the slider locking portion is mainly The slider acts not only in the closing direction of the slider but also in the direction of pressing it toward the lower half side, which avoids the possibility that the slider will bend downward and separate from the lower half, allowing the tape cassette drive to move in and out smoothly. There is no risk of weakening the locking force of.

[0009]

Embodiments of the tape cassette of the present invention will be described below with reference to the drawings. 1 shows a first embodiment of the tape cassette of the present invention, FIG. 2 shows a second embodiment of the tape cassette of the present invention, and FIG. 3 shows a third embodiment of the tape cassette of the present invention. Shows. Figure 1,
2 (a) and 3 (a) are partially enlarged side views taken along the line XX in the plan view of the lower half side of the tape cassette shown in FIG. FIG. 3B and FIG. 3B are enlarged perspective views showing the constituent members separately.

In the tape cassette of the first embodiment, as shown in FIG. 4, a slider 2 is slidably mounted on a cassette body (upper half is not shown) comprising an upper half and a lower half 1 which accommodates a magnetic tape. The winding portion 41 of the torsion spring 4 is fitted and inserted into the pin 3 provided on the inner surface of the lower half 1 and the slider 2 is always attached to the front of the cassette body by the elastic restoring force of the torsion spring 4. It is configured to boost.

Further, one arm portion 42 of the torsion spring 4 is engaged with the slider engaging portion 21 provided on the slider 2, and the other arm portion 43 is provided with the lower half engaging member on the lower half 1. It is locked to the stopper 11, and by the one arm 42 of the torsion spring 4,
The slider 2 is always urged forward of the cassette body via the slider locking portion 21. These configurations are similar to those of the conventional tape cassette.

In the tape cassette of this embodiment, as shown in FIG. 1, the winding portion 41 of the torsion spring 4 is fitted into the pin 3 and the winding portion pressing portion is provided above the pin 3. 31 is formed, and the winding part 41 is held horizontally by pressing the winding part 41 with the winding part pressing part 31, and the winding part pressing part 31 melts the upper part of the pin 3. Has been formed.

The tape cassette of this embodiment will be further described. As shown in FIG. 1, the pin 3 includes a base portion 32, a cylindrical winding portion fitting insertion portion 33 protruding from the base portion 32, and the winding portion. The winding part pressing part 31 is formed on the upper part of the fitting part 33. In the case of this embodiment, the winding portion pressing portion 31 is the winding portion 4 of the torsion spring 4.
1 is inserted into the winding portion fitting insertion portion 33, and the upper portion of the winding portion fitting insertion portion 33 is melted by ultrasonic waves or the like. The winding portion 41 of the torsion spring 4 is held horizontally by pressing the winding portion 41 between the winding portion pressing portion 31 and the base portion 32.

A second embodiment of the present invention is shown in FIG. Figure 2
As shown in (a) and FIG. 2 (b), also in this embodiment,
The pin 3 is composed of the base portion 32, the winding portion fitting portion 33, and the winding portion pressing portion 31 as in the first embodiment described above, but in this embodiment, the winding portion pressing portion is The part 31 has an O-ring 31 on the upper part of the winding part insertion part 33.
It is formed by joining a by fitting or adhesion. In other respects, the configuration is exactly the same as that of the first embodiment described above.

A third embodiment of the present invention is shown in FIG. FIG.
As shown in (a) and FIG. 3 (b), also in this embodiment,
The pin 3 is composed of the base portion 32, the winding portion fitting portion 33, and the winding portion pressing portion 31 as in the first and second embodiments described above, but in the present embodiment, The winding portion pressing portion 31 is provided with the winding portion fitting insertion portion 33 of the pin 3.
A recess 31b is provided on the upper part of the rivet 3
It is formed by inserting 1c. In other respects, the configuration is exactly the same as that of the first and second embodiments described above.

As described above, in any of the tape cassettes of the above-described embodiments, since the winding portion 41 of the torsion spring 4 is fitted into the pin 3 so as not to be tilted, the slider 2 moves downward. It is not biased downwards by being biased by the arm spring 42 and is locked to the slider locking portion 21 by the one arm portion 42 of the torsion spring 4.
The elastic restoring force of the slider 2 causes the slider 2 to move to the lower half 1.
Since it acts in the direction of pressing it to the side, the possibility that the slider 2 separates from the lower half 1 is avoided.

The present invention is not limited to the above embodiment, and the winding portion pressing portion 31 is provided on the upper portion of the pin 3 so as to hold the winding portion 41 of the torsion spring 4 horizontally. It should be formed. For example, as the O-ring in the second embodiment, a metal spring material having a hole slightly smaller than the outer diameter of the winding portion fitting insertion portion 33 in the center and radial cuts from the hole (in FIG. 2) 31 a ′), the O-ring 31 a ′ is pushed into the upper part of the winding part fitting and inserting part 33 to push the winding part pressing part 31.
If the rivet in the third embodiment is formed in such a manner that the winding portion 41 of the torsion spring 4 can be pressed, the shape of the upper portion is not a plate shape but a hemispherical shape. Other shapes such as (see 31c ′ in FIG. 3) may be used. Other points can be appropriately changed without departing from the gist of the present invention.

[0018]

According to the tape cassette of the present invention, it is possible to avoid the possibility that the slider will bend downward and separate from the lower half, so that the tape cassette drive can be smoothly moved in and out, and the locking force of the slider is weakened. There is no.

[Brief description of drawings]

FIG. 1 is a partially sectional enlarged side view of the tape cassette of the first embodiment of the present invention in which a winding portion of a torsion spring is attached to a pin (partial enlarged sectional side view taken along the line XX in FIG. 4). Figure).

FIG. 2 (a) is a partially enlarged cross-sectional side view (X- in FIG. 4) showing a state in which a winding portion of a torsion spring is attached to a pin in a tape cassette according to a second embodiment of the present invention.
It is an X-ray arrow partial cross-section enlarged side view). (b) is an enlarged perspective view showing the constituent members separately.

FIG. 3 (a) is a partially cross-sectional enlarged side view (X- in FIG. 4) showing a state in which a winding portion of a torsion spring is attached to a pin in a tape cassette according to a third embodiment of the present invention.
It is an X-ray arrow partial cross-section enlarged side view). (b) is an enlarged perspective view showing the constituent members separately.

FIG. 4 is a plan view of the lower half side of the tape cassette as viewed from the inside.

5 is a partially sectional enlarged side view (a partially sectional enlarged side view taken along the line XX in FIG. 4) of a conventional tape cassette in which a winding portion of a torsion spring is attached to a pin.

[Explanation of symbols]

 1 Lower half 2 Slider 3 Pin 31 Winding part holding part 4 Torsion spring 41 Winding part

Claims (4)

[Claims] 1. A slider body is slidably provided on a cassette body, which comprises a magnetic tape and is composed of an upper half and a lower half 1, and a torsion spring 4 is attached to a pin 3 projecting from an inner surface of the lower half 1. Insert the winding part 41,
In the tape cassette in which the slider 2 is always urged forward of the cassette body by the elastic restoring force of the torsion spring 4, the winding portion 41 of the torsion spring 4 is fitted into the pin 3, and The winding part pressing part 3 is provided on the upper part of the pin 3.
The tape cassette is characterized in that the winding portion 41 is formed by holding the winding portion 41 by pressing the winding portion 41 with the winding portion pressing portion 31. 2. The winding portion pressing portion 31 is formed by melting an upper portion of the pin 3.
The described tape cassette. 3. The tape cassette according to claim 1, wherein the winding portion pressing portion 31 is formed by connecting an O-ring 31a to an upper portion of the pin 3. 4. The winding portion pressing portion 31 is provided with a recessed portion 31b in an upper portion of the pin 3, and the rivet 31 is provided in the recessed portion 31b.
The tape cassette according to claim 1, wherein the tape cassette is formed by inserting c.