JPH0573765U - Tape cassette - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a tape cassette that avoids the possibility of the slider separating from the lower half, does not weaken the locking force of the slider, and can be smoothly moved in and out of a tape cassette drive. thing. [Structure] A slider is slidably provided on a cassette body, which is composed of an upper half and a lower half, in which a magnetic tape is housed, and a coil portion of a torsion spring is fitted to a cylindrical pin projecting on an inner surface of the lower half. In the tape cassette in which the slider is always biased forward of the cassette body by the elastic force of the torsion spring, a protrusion in the length direction of the pin is provided on the outer peripheral surface of the pin, and the protrusion is formed. It is characterized in that the diameter of the pin including the protrusion at the provided portion is made larger than the inner diameter of the coil portion of the torsion spring.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a tape cassette, and more particularly to a tape cassette in which the locking force of a slider is not weakened and the tape cassette drive can be smoothly inserted and removed.

[0002]

[Prior art]

 In the tape cassette, a slider is slidably provided on a cassette body that houses a magnetic tape, and a torsion spring is provided on the lower half of the cassette body. In such a tape cassette, as shown in FIG. 5, the coil spring 61 of the torsion spring 6 is fitted to the cylindrical pin 5 projecting from the surface of the lower half 3 on the upper half 2 side. One arm portion 62 of the torsion spring 6 is inserted into the slider engaging portion 41 provided on the slider 4, and the other arm portion is attached to the lower half 3 and the torsion spring 6 is inserted. The slider 4 is constantly urged forward of the cassette body by the elasticity of the spring 6.

Further, in order to facilitate the work of inserting the coil portion 61 of the torsion spring 6 into the pin 5 when assembling the tape cassette, the torsion spring 6 has an inner diameter of the coil portion 61 of the coil portion 61. The outer diameter of the pin 5 for inserting the portion 61 is larger than that of the pin 5.

[0004]

[Problems to be solved by the device]

 However, in the conventional tape cassette as described above, since the slider locking portion 41 is located below the coil portion 61 of the torsion spring 6 (on the back surface side of the cassette), the coil portion 61 is Due to the gap between the inside of the portion 61 and the pin 5, the coil portion 61 is inclined with respect to the pin 5 into which the torsion spring 6 is inserted as shown in FIG. As a result, the slider 4 is biased not only in the front direction (close direction) of the slider 4 but also in the lower direction, so that the slider 4 and the lower half 3 are slightly separated from each other, so that the slider 4 is separated. The locking force of No. 4 may be weakened, and the cassette may not be able to be smoothly inserted into and removed from the tape cassette drive.

Therefore, an object of the present invention is to avoid the possibility that the slider will be separated from the lower half, the locking force of the slider will not be weakened, and the tape cassette drive can be smoothly inserted / removed. To provide.

[0006]

[Means for Solving the Problems]

 According to the present invention, a slider is slidably provided on a cassette body including an upper half and a lower half that accommodates a magnetic tape, and a coil portion of a torsion spring is provided on a cylindrical pin protruding from the inner surface of the lower half. In the tape cassette in which the slider is constantly urged forward of the cassette body by the elastic force of the torsion spring, a protrusion in the length direction of the pin is provided on the outer peripheral surface of the pin. The above object is achieved by providing a tape cassette characterized in that the diameter of the pin including the ridge in the portion provided with the ridge is larger than the inner diameter of the coil portion of the torsion spring. It is a thing.

[0007]

[Action]

 According to the tape cassette of the present invention, a protrusion in the length direction of the pin is provided on the outer peripheral surface of the pin, and the diameter of the pin including the protrusion at the portion where the protrusion is provided is determined by the coil portion of the torsion spring. Since the coil portion of the torsion spring is not tilted by making it larger than the inner diameter of the slider, the repulsive elastic force by one arm of the torsion spring locked in the slider locking portion causes the slider to move. It acts in the direction of pressing the lower half side, the slider is prevented from separating from the lower half, the locking force of the slider is not weakened, and the tape cassette drive can be smoothly moved in and out.

[0008]

【Example】

 An embodiment of the tape cassette of the present invention will be described below with reference to the drawings. 1 to 4 show an embodiment of the tape cassette of the present invention. FIG. 1 is a plan view of the lower half side of the tape cassette as seen from the inside, and FIG. 2 is a line AA shown in FIG. 2 is a perspective view of the pin shown in FIG. 2, and FIG. 4 is a plan view of the pin portion shown in FIG.

As shown in FIG. 1, the tape cassette of this embodiment has a cassette body 1 (upper half is not shown) that houses a magnetic tape, and comprises a slider 4 and an upper half 2 and a lower half 3. Is slidably provided, and a coil portion 61 of a torsion spring 6 is fitted and inserted into a columnar pin 5 projectingly provided on the inner surface of the lower half 3, and the slider 4 is attached to the cassette by elastic force of the torsion spring 6. It is configured to always urge the front of the main body 1.

Further, one arm portion 62 of the torsion spring 6 is engaged with the slider engaging portion 41 provided on the slider 4, and the other arm portion 63 is provided on the lower half 3 with a lower half. It is locked to the locking portion 31, and one arm portion 62 of the torsion spring 6 always urges the slider 4 forward of the cassette body 1 via the slider locking portion 41. is there.

As shown in FIG. 2, the tape cassette of this embodiment is provided with a protrusion 7 in the longitudinal direction (vertical direction) of the pin 5 on the outer peripheral surface of the pin 5, and the protrusion 7 is formed. The diameter of the pin 5 including the protrusion 7 in the provided portion is made larger than the inner diameter of the coil portion 61 of the torsion spring 6.

To further explain the tape cassette of the present embodiment, as shown in FIG. 3, two ridges 7 are provided, and the tips 71 of the ridges 7 are rounded so that the upper ends of the ridges 7 are rounded. The part 72 is formed as a slope.

The two protrusions 7, 7 are provided on opposite sides with respect to the center of the pin 5 so that the line connecting the protrusions 7 faces the front-back direction of the cassette body 1. It is arranged.

Then, as shown in FIG. 4, a coil portion 61 of the torsion spring 6 having an inner diameter smaller than the diameter of the pin 5 including the protrusion 7 is provided in a portion of the pin 5 where the protrusion 7 is provided. The coil portion 61 of the torsion spring 6 is pressed against the pin 5 by its restoring elasticity and is positioned horizontally by being forcibly fitted.

As described above, in the tape cassette of this embodiment, the torsion spring 6 is inserted into the pin 5 so that the coil portion 61 of the tape is not tilted. The repulsive elastic force of the one arm portion 62 of the torsion spring 6 that is locked to 41 acts in the direction of pressing the slider 4 toward the lower half 3 side, and as a result, the slider 4 moves from the lower half 3 side. The danger of being separated is avoided.

Further, since the two ridges 7, 7 are arranged so that the line connecting them is oriented in the front-rear direction of the cassette body 1, the ridge 7 is surely placed in the lower front direction of the torsion spring 6. Inclination can be prevented, and the repulsive resilience of the arm portion 62 of the torsion spring 6 acts more reliably in the direction of pressing the slider 4 toward the lower half 3 side.

Further, since the protrusion 7 has a rounded tip 71 and an upper end 72 that is an inclined surface, the coil portion 61 can be smoothly inserted and inserted.

The present invention is not limited to the above-described embodiment. For example, in the above-described embodiment, two ridges 7 are provided, but the number of ridges 7 is not limited. Also, the position where the ridge is provided can be changed appropriately.

[0019]

[Effect of the device]

 The tape cassette of the present invention avoids the possibility that the slider will separate from the lower half, does not reduce the locking force of the slider, and can be smoothly inserted into and removed from the tape cassette drive.

[Brief description of drawings]

FIG. 1 is a plan view of a lower half side of a tape cassette as viewed from the inside.

FIG. 2 is an enlarged side view of a partial cross section taken along the line AA shown in FIG.

FIG. 3 is a perspective view of the pin shown in FIG.

FIG. 4 is a plan view of the pin portion shown in FIG.

FIG. 5 is an enlarged cross-sectional view of a conventional tape cassette corresponding to FIG.

[Explanation of symbols]

 1 cassette body 2 upper half 3 lower half 4 slider 5 pin 6 torsion spring 61 coil part 7 ridge

Claims (3)

[Scope of utility model registration request] 1. A coil body of a torsion spring, wherein a slider is slidably provided on a cassette main body which houses a magnetic tape and is composed of an upper half and a lower half, and a cylindrical pin protruding from the inner surface of the lower half. In the tape cassette in which the slider is always biased forward of the cassette body by the elastic force of the torsion spring, a protrusion in the length direction of the pin is provided on the outer peripheral surface of the pin, A tape cassette characterized in that a diameter of a pin including the protrusion at a portion provided with a stripe is made larger than an inside diameter of a coil portion of the torsion spring. 2. The tape according to claim 1, wherein the protrusion is provided such that a line connecting the center of the pin and the tip of the protrusion is oriented in the front-rear direction of the cassette body. cassette. 3. The tape cassette according to claim 2, wherein the pin is provided with two protrusions.