JPH0447826Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to a tape cassette containing magnetic tape.

[Conventional technology]

R-DAT audio tape uses a tape cassette with a hub locking mechanism.

The general structure of a conventional tape cassette, which has already been standardized as an R-DAT audio tape, will be explained with reference to FIGS. 4 and 5. The upper half 1 and the lower half (not shown) are stacked one above the other. By combining them, a box-shaped shell is formed, and a lid 3 for opening and closing the front surface of the shell is pivotally connected between the upper half 1 and the lower half. In FIG. 4, the two-dot chain line indicates the hubs 6, 6 rotatably fitted between the upper half 1 and the lower half, and the magnetic tape 8 wound around these hubs.

A hub lock member 4 is incorporated into the upper half 1 so as to be slidable back and forth. This hub lock member 4 has hub brake pieces 5, 5 each protruding from both sides toward the hubs 6, 6.
and arms 9, 9 extending forward toward the lid 3 from both sides. Further, a spring 7 is engaged with the hub lock member 4, and is biased rearward.

When the tape cassette is unloaded, that is, when the lid 3 is closed, the hub lock member 4 is operated by the elasticity of the spring 7 to prevent the hub brake pieces 5, 5 from moving.
The tips of the hubs 6, 6 abut against the circumferential surfaces of the hubs 6, 6, and lock the hubs 6, 6. On the other hand, when the tape cassette is loaded onto a tape deck or the like and the lid 3 is opened, the arms 9, 9 are hooked onto the lid 3 and pulled forward, and the tips of the hub braking pieces 5, 5 touch the circumferential surfaces of the hubs 6, 6. The lock is released by moving away from the

[Problem that the invention attempts to solve]

However, as shown in FIG. 5, the hub brake pieces 5, 5 of the hub lock member 4 contact the circumferential surfaces of the hubs 6, 6 at one place, so the lid 3 closes and the hub brake pieces 5, 5 When it hits the circumferential surface of 6,6,
The hubs 6, 6 tend to shift in the direction indicated by the arrow in FIG. For this reason, the tips of the hub braking pieces 5, 5 do not touch the circumferential surfaces of the hubs 6, 6, resulting in a problem that they are not locked or the locked state is canceled when they should be locked.

In addition, since the tips of the hub brake pieces 5, 5 contact the hubs 6, 6 only from one side, if the rotation directions of the hubs 6, 6 are different, the resistance exerted by the hub brake pieces 5, 5 on the hubs 6, 6 will be different. This resulted in a difference in the braking force exerted by the hub lock member 4, resulting in the problem that stable locking of the hubs 6, 6 could not be achieved.

This invention was made to solve the above-mentioned problems in conventional tape cassettes.

[Means to solve the problem]

The structure of this invention will be explained with reference to the reference numerals in FIGS. 1 to 5. The tape cassette according to this invention consists of an upper half 11 and a lower half 12 constituting a box-shaped shell 10, both halves 11, 1
a lid 13 that opens and closes the front surface of the shell 10, which is pivotally connected between the two halves 11 and 12;
a magnetic tape 24 wound around the two halves 6 and 16; a hub lock member 14 slidably incorporated between the two halves 11 and 12 in conjunction with the lid 13; and a hub lock member 14 protruding from the hub lock member 14 toward the hubs 16 and 16. The hub braking pieces 15, 15 are provided with a spring 17 that presses the tips of the hub braking pieces 15, 15 toward the circumferential surfaces of the hubs 16, 16.

The hub lock member 14 includes a pair of hub brake pieces 15 for each hub 16, 16.
15, and the hub braking pieces 15, 15 are arranged symmetrically on both sides of the center of the hubs 16, 16 so that their tips 18, 18... contact the peripheral surfaces of the hubs 16, 16 from both sides. has been done.

[Function] In the above tape cassette, the hublock member 14
The tips 18, 18 of the hub brake pieces 15, 15 are arranged symmetrically on both sides of the center of the hubs 16, 16, so the tips 18, 18 of the hub brake pieces 15, 15 are arranged symmetrically on both sides of the hub 16, 16. , 16 from both sides so that the hubs 16, 16 do not escape to the left or right. At this time, the tips 18, 18... of the hub braking pieces 15, 15 are connected to the hub 1.
6, 16 symmetrically, the hub 16,
No matter which direction the hubs 16 are rotated, the hubs 16, 16 can be braked in the same way.

〔Example〕

Next, an embodiment of this invention will be described with reference to FIGS. 1 to 5.

A shell 10 is constructed by stacking an upper half 11 and a lower half 12 vertically, and both halves 11 and 12
A lid 13 for opening and closing the front surface of the shell 10 is pivotally mounted between the two. Note that the lid 13 is connected to the spring 21
The elastic force is always applied in the direction of closing the front of the case. Further, a slider 31 is attached to the lower half 12 to open and close the hub holes 22, 22 (see FIG. 2). The appearance of the shell 10 is as shown in FIG.

The hub lock member 14 is attached to either the upper or lower half 1.
1 and 12, but here the upper half 1
1 will be explained.

As shown in FIG. 1, the upper half 11 consists of a main body 19 and a transparent window plate 20 that closes the window.
3, 23 are formed, and in this hub receiver 23, 23,
The hubs 16, 16 around which the magnetic tape 24 is wound are rotatably fitted. The hubs 16, 16 have bosses 27, 27, as shown in FIGS. 3 to 5,
Fine irregularities are formed on its circumferential surface. In addition, in FIG. 1, 26 and 26 indicate the magnetic tape 24.
It is a friction sheet that sandwiches the

As shown in FIG.
5, and a spring receiver 28 is provided on the upper half main body 19 located further forward during assembly.

As shown in FIGS. 1 and 3 to 5, the hub lock member 14 is a plate-shaped member that is elongated from side to side, and has arms 30, 30 integrally extending forward from both sides thereof. Further, hub brake pieces 15, 15 are protruded from the rear edge of the hub lock member 14, and as shown in FIG. There is.

This hub lock member 14 is connected to the upper half 11.
The spring 17 is placed on the inner surface of the shell 10, and the spring 17 is placed against the spring receiver 28, and the other side is placed against the stoppers 25, 25, and is incorporated into the shell 10. In this state, when the lid 13 is closed, the hub lock member 14 is pushed by the spring 17 until it hits the stoppers 52, 25, and the hub brake pieces 15, 15
comes into contact with the circumferential surfaces of the bosses 27, 27 of the hubs 16, 16, and locks the hubs 16, 16. On the other hand, when the lid 13 is opened, the arms 30, 3
The lid 13 is applied to the hub 0, and the lid 13 pulls the hub lock member 14 forward against the elasticity of the spring 17. Therefore, the hub brake pieces 15, 15 are separated from the bosses 27, 27 of the hubs 16, 16, and the lock is released.

In the embodiment shown in FIGS. 1 and 3, two hub braking pieces 15, 15, . ing. When the lid 13 is closed, the elasticity of the spring 17 causes these tip portions 18, 18 to be attached to the bosses 2 of the hubs 16, 16.
7 and 27 from both sides.

[Effect of idea]

As explained above, according to this invention, the hub 1
6 and 16 do not escape to the left and right and the hub brake pieces 15 and 15
The tips 18, 18 of the hubs 16, 16 can be reliably applied, and the hubs 16, 16 can be braked in the same manner regardless of the rotation direction of the hubs 16, 16. This ensures that the hub 1 is always reliable and stable.
6 and 16 locks are possible.

[Brief explanation of the drawing]

Fig. 1 is an exploded perspective view of a tape cassette from the bottom showing an embodiment of this invention, Fig. 2 is an external perspective view of the cassette from the bottom, and Fig. 3 shows a hub in the same embodiment. FIG. 4 is a bottom view of a conventional tape cassette with the lower half removed, and FIG. 5 is a perspective view of the hub and hub lock member of the conventional tape cassette. 10... Ciel, 11... Upper half, 12...
Lower half, 13... Lid, 14... Hub lock member, 15... Hub brake piece, 16... Hub, 17
... Spring, 18 ... Tip, 24 ... Magnetic tape.

Claims (1)

[Scope of utility model registration request] An upper half 11 and a lower half 12 constituting the box-shaped shell 10, a lid 13 that opens and closes the front of the shell 10, which is pivotally connected between the halves 11 and 12, and is rotatable between the halves 11 and 12. A pair of hubs 16, 16 supported by the hubs 16, 16, a magnetic tape 24 wound around the hubs 16, 16, a hub lock member 14 slidably incorporated between the two halves 11, 12 in conjunction with the lid 13, Hub lock member 1
Hub brake pieces 15, 15 protruding from 4 toward the hubs 16, 16, and the hub brake pieces 15, 1
In the tape cassette, the hub lock member 14 is provided with a spring 17 that presses the tips of the hubs 16, 16 toward the circumferential surfaces of the hubs 16, 16.
A pair of hub brake pieces 15, 15 for every 6, 16
The hub braking pieces 15, 15 are arranged symmetrically on both sides of the center of the hubs 16, 16 so that their tips 18, 18... contact the circumferential surfaces of the hubs 16, 16 from both sides. A tape cassette characterized by: