JPH0743820Y2 - Tape cassette - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a tape cassette, and more specifically, an opening / closing operation of a slider attached to a lower half forming a cassette body so as to be movable back and forth. The present invention relates to a tape cassette that can be stabilized for a long period of time.

[Conventional technology]

The conventional tape cassette will be described with reference to FIGS. 5 to 8. As shown in FIG.
An upper half 1 and a lower half 2 that form a cassette body that rotatably accommodates a hub (not shown) wound with tape.
And a slider 3 which is arranged so as to be movable back and forth with respect to the lower half 2 while covering the lower half 2.
A spring (not shown) is provided at the front edge of the lower half 2 so as to constantly urge the slider 3 forward, and further comprises the upper half 1 and the lower half 2.
A front lid 4 is openably and closably arranged at the front end edge of and, and is configured to open and close the front end edge depending on whether or not the cassette tape is used.

As shown in FIGS. 6 and 8, the lower half 2 is provided with a pair of first first and second holes formed before and after the slider 3.
Holes 32, 32 or a pair of second holes 33, 33 (see FIG. 7)
A locking piece 22 having a projection 22A fitted at its tip is connected to the lower half 2 at one end and is integrally formed with the lower half 2 to form a pair on the left and right. The projection 22A of the locking piece 22 moves up and down with respect to the surface of the lower half 2 as the slider 3 moves forward and backward, and the first hole 32 or the second hole The protrusions 22A are fitted in the 33, and the pair of openings 21, 21 formed in the lower half 2 are opened and closed via the pair of openings 31, 31 formed in the slider 3, respectively. It is configured to stop.

As shown in FIG. 6, the locking piece 22 extends from the connecting portion with the lower half 2 as an elongated rectangular piece in the front-rear direction,
A gap 23 is formed between the three sides other than the connecting portion and the lower half 2.
Are formed.

Thus, when using the conventional tape cassette, when the tape cassette is loaded in the recording / reproducing apparatus, the front lid 4 of the tape cassette is opened, and the slider 3 moves backward against the biasing force of the spring, and the slider 3 The hole portions 31, 31 of the lower half 2 are overlapped with the hole portions 21, 21 of the lower half 2 so that the drive portion of the recording / reproducing apparatus is engaged with the hub, and the hub can rotate.
At this time, the locking piece 22 of the lower half 2 has its protrusion 22A
As shown in the figure, the slider 3 is fitted into the first hole 32 of the slider 3 to lock the slider 3 and maintain the open state.

On the other hand, when recording on or reproducing from the tape is completed and the tape cassette is removed from the recording / reproducing device, when the slider 3 advances due to the urging force of the spring, the locking piece 22 of the lower half 2 moves the connecting portion. Swing to the center,
The protrusion 22A is disengaged from the first hole 32 of the slider 3 and pushed into the inside of the lower half 2 so that the first hole 32 and the second hole 33 are formed.
The hole portion 31 of the slider 3 is displaced from the hole portion 21 of the lower half 2 and is not overlapped with each other, and the hole portion of the lower half 2 is eliminated.
21 is blocked.

[Problems to be solved by the device]

However, in the conventional tape cassette, the first hole 32 and the second hole 33 formed in the slider 3 are all formed such that the inner surfaces thereof are perpendicular to the surface forming the main body of the slider 3. Therefore, in the slider 3 urged by the spring, for example, as shown in FIG.
However, there is a problem in that a rotation moment is generated in the locking piece 22 and the locking piece 22 is bent inward, so that the projection 22A is easily removed from the first hole 32.

Therefore, an object of the present invention is to reduce the rotation moment acting on the protrusion of the locking piece to suppress the bending of the locking piece so that the protrusion of the locking piece is formed in the first hole or the second hole of the slider. An object of the present invention is to provide a tape cassette that can be positively engaged with each other.

[Means for Solving the Problems]

The present invention provides an upper half 1 and a lower half 2 that form a cassette body that rotatably houses a tape-wound hub.
And a slider 3 which is arranged so as to be movable back and forth with respect to the lower half 2 while covering the lower half 2.
The lower half 2 so as to urge the slider 3 forward.
With a spring arranged at the front edge of the
The locking piece 22 having 22A formed therein is connected to the lower half 2 to be integrated, and the protrusion 22A is fitted into the first hole 32 or the second hole 33 formed in the front and rear of the slider 3. ,
In the tape cassette, in which the biased slider 3 is locked and the opening portion 21 formed in the lower half 2 is opened and closed by the opening portion 31 formed in the slider 3, Contact surfaces of the first hole 32 and the second hole 33, respectively, are substantially perpendicular to the moving direction of the slider 3, and the first hole 32 and the second hole
33. The above object is achieved by providing a tape cassette characterized in that small projections 32B, 33B biased to the lower half 2 side are provided on the contact surfaces 32A, 33A of the respective projections 22A. It was done.

[Action]

According to the present invention, the small protrusion of the first hole or the small protrusion of the second hole of the slider abuts near the base of the protrusion of the locking piece,
The bending of the locking piece can be suppressed.

〔Example〕

Hereinafter, based on the embodiment shown in FIGS. 1 (a), (b) and (c) to FIG. 4, the same or corresponding portions as those in the prior art will be denoted by the same reference numerals and the description will focus on the features of the present invention. To do. In each figure,
FIG. 1 is a diagram showing a slider used in an embodiment of the tape cassette of the present invention. FIG. 1 (a) is a plan view showing the inner surface thereof, and FIG. 1 (b) is a line I- in FIG. 1 (a). A sectional view taken along the line I, FIG. 6 (c) shows the relationship between the slider and the lower half of FIG. 1, and FIG. 2 (b) is an equivalent view, FIG. 2 and FIG. 3 are other embodiments of the tape cassette of the present invention. FIG. 1 (b) is a view showing a slider used in the example, and FIG. 4 is a view showing a slider used in still another embodiment of the tape cassette of the present invention.

As shown in FIG. 5, the tape cassette of this embodiment moves forward and backward with respect to the lower half 2 while covering the upper half 1 and the lower half 2 forming the cassette body and the lower half 2. It is provided with a slider 3 freely arranged and a front lid 4 arranged on the front end edges of the upper half 1 and the lower half 2, and in this respect, it is configured according to a conventional tape cassette.

Thus, in this embodiment, as shown in FIGS. 1A and 1B, the first hole 32 and the second hole 33 in the protrusion 22A formed on the locking piece 22 are respectively formed. The contact surface with and is substantially perpendicular to the moving direction of the slider 3. Abutment surface 32A of the first hole 32 and the second hole 33 formed in the slider 3 with the projection 22A.
And 33A are provided with small protrusions 32B and 33B located on the lower half 2 side, and the small protrusions 32B and 33B are also provided.
As shown in FIG. 1 (a), the tip is formed as a flat surface over the entire width of the contact surfaces 32A, 33A.

Therefore, when the openings 21, 21 of the lower half 2 are opened, the slider 3 is retracted against the biasing force of the spring, and the projection 22A is fitted into the first hole 32.
In that state, the slider 3 is urged forward by a spring, and the first hole 32 is projected by the small projection 32B provided on the contact surface 32A thereof as shown in FIG. 1 (c).
It is configured to come into contact with the vicinity of the base of A. That is,
Since the point of action of the biasing force of the spring acting on the protrusion 22A via the small protrusion 32B is on the base side of the protrusion 22A as compared with the prior art, the rotational moment due to the biasing force becomes smaller and the locking The inward bending of the piece 22 is suppressed.

As described above, according to the tape cassette of the present embodiment, the biasing force of the spring acts on the vicinity of the base of the projection 22A of the locking piece 22 via the first hole 32 or the second hole 33 of the slider 3 to generate a rotation moment. By reducing the bending of the locking piece 22 to suppress the protrusion 22A,
The hole 33 can be surely engaged with the hole 33, and there is no fear that the slider 3 is accidentally disengaged from the lower half 2.

Further, the small protrusions 32B and 33B have a cross-sectional shape of the tip of the second
Even if it has an arcuate shape as shown in the drawing, or has an acute-angled shape as shown in FIG. 3, it is possible to obtain the same effects as those of the above embodiment.

Further, in each of the above embodiments, the small protrusion 32B or 33B is described as being formed over the entire width direction of the contact surfaces 32A, 33A of the respective holes 32, 33, but the small protrusions 32B, 33B are
Even if the cross sectional shape formed according to each of the above embodiments is partially provided in the width direction of the contact surfaces 32A and 33A as shown in FIG. The same effect as can be expected.

The small protrusion in the present invention is the first hole of the slider,
The position and shape of the second hole are not particularly limited as long as they are provided so as to be biased to the lower half side on the contact surface with the protrusions of the second holes.

[Effect of device]

The tape cassette of the present invention reduces the rotation moment acting on the protrusion of the locking piece to suppress the bending of the locking piece so that the protrusion of the locking piece can be inserted into the first hole or the second hole of the slider. And can be reliably engaged.

[Brief description of drawings]

FIG. 1 is a view showing a slider used in an embodiment of the tape cassette of the present invention. FIG. 1 (a) is a plan view showing the inner surface of the slider, and FIG. 1 (b) is a view of I in FIG. 1 (a). A cross-sectional view taken along the line I, FIG. 6 (c) is a view showing the relationship between the slider and the lower half of FIG. 1, corresponding to FIG. 1 (b), and FIGS. 2 and 3 are the other tape cassettes of the present invention. 1 (b) corresponding to FIG. 1 (b) showing a slider used in this embodiment, and FIG. 4 shows a slider used in still another embodiment of the tape cassette of the present invention. FIG. 6 is a perspective view showing the appearance of a conventional tape cassette, FIG. 6 is a perspective view showing the inner surface of the lower half of FIG. 5 taken out, and FIG.
FIG. 8 is a perspective view showing the inner surface of the slider taken out, and FIG. 8 is a sectional view showing the relationship between the lower half of FIG. 6 and the slider of FIG. 1; Upper half, 2; Lower half 3; Slider, 21, 31; Opening part 22: Locking piece, 22A; Protrusion 32; First hole, 33; Second hole 32A, 33A; Contact surface 32B , 33B; small protrusion

Continuation of front page (72) Hidetoshi Watanabe 2606 Akabane, Kaiga-cho, Haga-gun, Tochigi Prefecture Kao Co., Ltd. Institute of Information Science (56) References 62-69881 (JP, U) (JP, U)

Claims (1)

[Scope of utility model registration request] 1. An upper half 1 and a lower half 2 which form a cassette body for rotatably accommodating a tape-wound hub.
And a slider 3 which is arranged so as to be movable back and forth with respect to the lower half 2 while covering the lower half 2.
The lower half 2 so as to urge the slider 3 forward.
With a spring arranged at the front edge of the
The locking piece 22 having 22A formed therein is connected to the lower half 2 to be integrated, and the protrusion 22A is fitted into the first hole 32 or the second hole 33 formed in the front and rear of the slider 3. ,
In the tape cassette, in which the biased slider 3 is locked and the opening portion 21 formed in the lower half 2 is opened and closed by the opening portion 31 formed in the slider 3, Contact surfaces of the first hole 32 and the second hole 33, respectively, are substantially perpendicular to the moving direction of the slider 3, and the first hole 32 and the second hole 33, respectively. A tape cassette characterized in that small projections 32B, 33B biased to the lower half 2 side are provided on the contact surfaces 32A, 33A with the projection 22A, respectively.