JPH0413807Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] This invention relates to a tape cassette that stores a magnetic tape wound around a hub, and in particular, a mechanism for locking or unlocking the hub by opening and closing the lid. The present invention relates to a tape cassette equipped with a tape cassette.

[Conventional technology]

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

The general structure of this type of tape cassette, which has already been standardized, will be explained with reference to FIGS. 6 to 8. The upper half 1 and the lower half (not shown in FIGS. 6 to 8) are By overlapping them, a box-shaped shell 2 is formed. A pair of hub receivers 3, 3 are provided on the inner surface of the upper half 1, into which hubs 8, 8 of the magnetic tape 5 are rotatably fitted. Incidentally, hub holes are also formed in the lower half corresponding to the hub receivers 3, 3, and the other ends of the hubs 8, 8 are supported in these holes.

A hub lock member 4 is incorporated into the upper half 1 so as to be movable back and forth, and a hub stop projection 4 extends from the rear end edge of the hub lock member 4 toward the hub receivers 3, 3.
a and 4a are protruded. Further, arms 4b, 4b protrude forward from both sides, and a spring 6 is attached to the intermediate portion thereof.

A lid 7 for opening and closing the front of the case is rotatably mounted between the upper half 1 and the lower half.
Lock release pieces 7b, 7b are provided on side plates 7a, 7a on both sides of the lid 7.

When the lid 7 of the hub lock member 4 is closed, the lock release pieces 7b, 7b are separated from the arms 4b, 4b of the hub lock member 4, as shown by solid lines in FIGS. 6, 7, and 8. ing.
In this state, as shown in FIG. 6, the hub lock member 4 is pushed rearward by the elasticity of the spring 6.
The hub locking protrusions 4a, 4a come into contact with the hubs 8, 8 and lock them.

On the other hand, as shown by the two-dot chain line in FIG. 7, when the lid 7 is opened, the arms 4b, 4
The lock release pieces 7b, 7 of the lid 7 are attached to the tip of the lid 7.
b is applied and pulls the hub lock member 4 forward against the elasticity of the spring 6. With this, the hub stop protrusion 4
a, 4a are removed from the hubs 8, 8, and the lock is released.

As shown in FIGS. 7 and 8, in the conventional tape cassette, the abutting surfaces a that correspond to the tips of the arms 4b, 4b of the lock release pieces 7b, 7b touch the bottom surface of the shell 2 when the lid 7 is closed. It was formed so that it faced straight to the side.

[Problem that the invention attempts to solve]

However, in the above-mentioned tape cassette, when the lid 7 is opened, as shown by the two-dot chain line in FIG. It hits the tips of the arms 4b, 4b of the hub lock member 4 from diagonally below and pushes them up.

Therefore, each time the lid 7 is opened, the hub lock member 4 is lifted up from the upper half 1.
It is easy to come off or shift from the specified position. This causes malfunctions in locking and releasing the hubs 8,8.

Further, when assembling the tape cassette, as shown in FIG. 6, the hub lock member 14 is assembled into the upper half 1, and then the hubs 32 are assembled, so when the lid 7 is opened, the hub lock member 4 is removed from the upper half 1. It makes me stand out. Therefore, the hubs 8, 8 cannot be assembled into the hub receivers 3, 3.

The purpose of this invention is 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. This tape cassette consists of a pair of hubs 32, 32 rotatably mounted in a box-shaped shell 10, and a box-shaped shell 10. A hub lock member 14 is incorporated in the shell 10 so as to be slidable back and forth and locks the hubs 32, 32 by the elasticity of a spring 16; arms 30, 30 extend from the hub lock member 14 to the front of the shell 10; A lid 20 is pivotally connected to open and close the front surface of the shell 10, and when the lid 20 is opened, the arm 3
0, 30 and pulls the hub lock member 14 forward against the elasticity of the spring 16.

Then, the abutting surfaces 37 of the lock release pieces 36, 36 with the arms 30, 30 are tilted so as to face obliquely forward of the shell 10 with respect to the direction in which the hub lock member 14 slides with the lid 20 closed. There is.

[Effect]

In the tape cassette described above, when the lid 20 is rotated from the closed state as shown by the solid line in FIGS. As shown, the unlocking pieces 36, 36 of the lid 20 abut the arms 30, 30 of the hub lock member 14.

The abutting surfaces 37 of the lock release pieces 36, 36 are as follows:
Since the lid 20 is already inclined diagonally forward to some extent before it is opened, when the lid 20 is opened, it is at an angle close to perpendicular to the direction in which the hub lock member 14 slides (the left-right direction in FIG. 2). Stand up and hit the arms 30, 30 in this state. Therefore, when the lid 20 is further opened, the arms 30, 30 are pulled straight forward. As a result, the hub lock member 14 shown in FIG. 3 slides forward, and the hubs 32, 32 are unlocked.

〔Example〕

Next, an embodiment of this invention will be described with reference to FIGS. 1 to 4.

As shown in FIG. 4, the tape cassette is box-shaped and consists of an upper half 11 and a lower half 1.
2 above and below, and both halves 11,
The lid 20 is pivotally mounted to open and close 12 front openings. Furthermore, in the lower half 12,
A slide 29 for opening and closing the hub hole (not shown) is fitted so as to be slidable forward and backward.

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

As shown in FIG. 3, the upper half 11 consists of a half body 22 and a window plate 23, and a rectangular window hole 24 is provided in the center of the half body 22. The window plate 23 is made of a transparent plate and is fitted into the window hole 24 so as to close it.

A pair of hub holders 13,
13 is formed, and hubs 32, 32 around which a magnetic tape 31 is wound are rotatably fitted. In addition, in FIG. 1, 33 and 33 indicate the magnetic tape 3.
It is a friction sheet that sandwiches 1, and the upper half 1
The one inserted on one side is transparent.

On both sides of the front of the hub receivers 13, 13 of the window plate 23,
Stoppers 25, 25 made of protrusions for stopping a hub lock member 14, which will be described later, are provided. Further, a spring receiver 28 is formed in the half body 22.

The hub lock member 14 consists of a plate-shaped member that is long from side to side, and arms 30, 30 extend rearward from both sides.
has been extended. The tips of the arms 30, 30 are bent outward in a U-shape and are hook-shaped. Sharp hub locking protrusions 15, 15 project from the rear edge of the hub lock member 14, and a spring 16 is attached to the center of the front edge of the hub lock member 14. This hub lock member 14 is constructed by applying the spring 16 to the spring receiver 28, inserting the hub stop protrusions 15, 15 into the hub receivers 13, 13, and applying the front edge to the stoppers 25, 25. It is incorporated into the upper half 11 by receiving it.

The lid 20 has side plates 34, 34 extending rearward from both sides, which sandwich the upper half 11 on both sides, and a support shaft 35, which protrudes inward from the side plates 34, 34.
35 is rotatably supported on the side surface of the upper half 11. Note that a spring 21 is attached to one of the support shafts 35 and is elastically biased in a direction to close the lid 20.

1 and 2 show the mechanism at one end of the lid 20, and as shown in these figures, a lock release piece 3 is provided inside the tips of the side plates 34, 34.
6,36 are provided. This lock release piece 3
6, 36 pressing surface 37 to the arms 30, 30
is inclined diagonally forward with respect to the direction in which the hub lock member 14 slides. The desired angle of inclination varies depending on the positional relationship with the arms 30, 30. That is, as shown by the two-dot chain line in FIG. 2, the lid 20 begins to open and the arm 3
It is most desirable that the pressing surface 37 rises nearly vertically when it hits the tip of the 0.30.

In the embodiment shown in FIGS. 1 to 3, the tips of the arms 30, 30 of the hub lock member 14 are bent outward in a U-shape to form hooks. release piece 36,
The pressing surface 37 side of 36 is formed in a groove shape. On the other hand, in the embodiment shown in FIG.
Since the tip of the lock release piece 3 is bent outward in an L-shape, it is hook-shaped.
6 and 36 also have a planar pressing surface 37 without grooves that is sufficient to make surface contact therewith.

In both embodiments, the lower surface of the rear side of the tip of the arms 30, 30, that is, the lock release pieces 36, 3
The surface that 6 hits is arc-shaped. However, this shape can be selected as appropriate depending on the shape of the pressing surface 37. Further, the other pressing surface 37 is not limited to a linear one as shown in the figure, but may be continuously or intermittently sloped, for example, by forming the pressing surface 37 with a concave circular arc surface in accordance with the circular arc surface. The pressing surface 37 may have a changing angle.

As explained above, according to this invention, when the lid 20 is opened, the arms 30, 30 of the hub lock member 14 can be pulled straight forward, so that the hub lock member 14 can be attached to the upper half 11 (or the lower half 12). ) does not rise from the surface. For this reason,
The hubs 32, 32 can be reliably locked and unlocked. Also, when assembling the tape cassette, the hub 32,
32 is also easy to incorporate.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of the main mechanism of a tape cassette showing an embodiment of this invention, Fig. 2 is a side view of the same mechanism, and Fig. 3 is an exploded perspective view of the tape cassette seen from the bottom side. , FIG. 4 is an external perspective view of the cassette seen from the bottom side, FIG. 5 is a perspective view of the main mechanism of the tape cassette showing another embodiment, and FIG. 6 is a conventional example of the tape cassette. 7 is a perspective view of the main mechanism of the conventional example, and FIG. 8 is a side view of the same mechanism. 10... Shell, 14... Hublock member, 1
6... Spring, 20... Lid, 30... Arm,
32...Hub, 36...Lock release piece, 37...
The pressing surface of the lock release piece.

Claims (1)

[Scope of utility model registration request] A pair of hubs 32, 32 are rotatably mounted in a box-shaped shell 10, and are incorporated in the shell 10 so as to be slidable back and forth, and the hubs 32, 32 are locked by the elasticity of a spring 16. a hub lock member 14, and a shell 1 from the hub lock member 14;
The arms 30, 30 extend forward of the shell 10, the lid 20 is pivotally connected to open and close the front surface of the shell 10, and when the lid 20 is opened, the arms 30,
30 and pulls the hub lock member 14 forward against the elasticity of the spring 16. In the tape cassette, the arms 30,
A tape cassette characterized in that a pressing surface 37 that contacts the shell 10 is inclined so as to face obliquely forward of the shell 10 with respect to the direction in which the hub lock member 14 slides when the lid 20 is closed.