JPH0437354Y2 - - Google Patents

Description

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

[Conventional technology]

1/2 inch or 8mm videotape, R-
For DAT audio tapes, etc., a tape cassette with a hub locking mechanism is used.

The general structure of a conventional tape cassette of this type will be explained with reference to FIG. 4.The cassette case is constructed by overlapping an upper half 1 and a lower half (not shown in FIG. 4) vertically. Formed into a box shape. In Fig. 4, the lower half is removed from the upper half 1 and turned upside down, with the inside facing up. magnetic tape a
The hubs b, b are rotatably fitted. Also.
A lid 7 for opening and closing the front of the case is rotatably mounted between the upper half 1 and the lower half.

A hub lock member 4 is incorporated into the upper half 1 so as to be movable back and forth. From this hub lock member 4, hub locking protrusions 5, 5 are protruded rearward toward the hub receivers 3, 3, and arms 8, 8 are protruded forward, the tips of which are connected to the lid 7. ing. Further, a spring 6 is engaged with the hub lock member 4, and is biased rearward.

When the lid 7 is closed, the hub locking projections 5, 5 are inserted into the notches formed in the hub receivers 3, 3 by the elasticity of the spring 6, as shown in FIG. inserted into the hub b,
Lock b. On the other hand, when the lid 7 is opened, the arms 8, 8 are pulled forward by the lid 7 against the elasticity of the spring 6, so the hub stop protrusions 5, 5 are separated from the hubs b, b, and the lock is closed. is canceled.

[Problem that the invention attempts to solve]

However, the conventional tape cassette described above has the following problems.

That is, the hub lock member 4 has play in the left and right sides with respect to the upper half 1, and its back and forth movement is not smooth. For this reason, the hub stop protrusions 5, 5 are attached to the hub b,
b, or the engagement with the lid 7 may become incomplete, resulting in malfunction. Furthermore, careful attention must be paid to the positioning of the hub lock member 4 when it is assembled into the upper half 1, and the assembly is time-consuming.

This invention was made in order to solve the above-mentioned problems with conventional tape cassettes, and aims to provide a tape cassette that has no backlash in the hub block member, has smooth back and forth movement, and is easy to assemble. purpose.

[Means to solve the problem]

That is, in the present invention, in order to achieve the above object, an upper half 11 and a lower half 12 having a pair of hub receivers 13 and 13 inside, a lid 20 for opening and closing the front surfaces of both halves 11 and 12, and a guide means are used. A hub lock member 14 is included in one of the halves 11 and 12 so as to be slidable back and forth and is connected to the lid 20. , 15, and is fitted with a spring 16 which is elastically biased in a direction in which the hub locking protrusions 15, 15 are inserted into the hub receivers 13, 13.
The ribs are arranged so as to face each other inwardly from both sides of the halves 11 and 12 on which the ribs are incorporated, and the ribs are inclined so that the height from the halves 11 and 12 on the upper side becomes lower as it goes inward. 31, 31
To provide a tape cassette characterized in that a hub lock member 14 is sandwiched between protruding ribs 31, 31.

[Effect]

In the above tape cassette, since the hub lock member 14 is sandwiched between the ribs 31, 31,
The left and right movement of the hub lock member 14 is regulated,
To surely slide only in the front and back direction without being diagonal in the sliding direction. Further, since the upper sides of the ribs 31, 31 are sloped so that the height from the halves 11, 12 decreases as they go inward, when assembling the hub lock member 14, the ribs 31, 31 are Just by dropping the hub lock member 14 between them, it will be guided by this slope,
The hub lock member 14 settles into position. As a result, the left and right positions of the hub lock member 14 during assembly are automatically determined, and the connection state with the lid 20 is established in the normal position.

〔Example〕

Next, an embodiment of this invention will be described with reference to FIGS. 1 to 3.

The tape cassette basically has a box shape, and has an upper half 11 and a lower half 12 stacked one on top of the other, and a lid 20 that opens and closes the front opening between both halves 11 and 12. It is composed of Note that the lid 20 is always biased with elasticity by a spring 21 in a direction to close the front surface of the case.

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 FIGS. 1 and 2, 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 fitted to close the window hole 24, and is made of a transparent plate.

On both sides of the half body 23, two pairs of ribs 31, 31, . is widely set. As shown in Figure 3, these ribs 3
The upper sides of 1, 31, . . . are sloped such that the height from the upper half 11 gradually decreases toward the inside.

A pair of hub holders 13,
13 is formed, and a notch opening forward is formed in this. These hub receivers 13, 13 include
Hubs b, b around which the magnetic tape a is wound are rotatably fitted. In FIG. 1, c and c are friction sheets that sandwich the magnetic tape a.

As shown in FIG.
Stoppers 25, 25 consisting of protrusions for stopping are provided, and protrusions 17, 1 extend forward from approximately the center.
7 is highlighted. A rectangular through hole is formed in the wall surface of the window plate 23 facing the protrusions 17, 17 to form recesses 18, 18 when the half body 22 is overlapped with the half body 22.

Furthermore, a through hole 2 for housing a spring 16 of a hub lock member 14, which will be described later, is provided in the front central part.
6 is opened, and a spring retainer 27 is placed on both sides of this.
has been erected.

This window plate 23 is fitted into the half body 22 so as to close the window hole 24 of the half body 22 and fixed. Furthermore, by overlapping the half body 22 and the window plate 24, the bottom of the through hole opened in the window plate 23 is closed by the half body 22, forming recesses 18, 18. Note that a spring receiver 28 made of a protrusion is formed on the half body 22 so as to be located further rearward of the spring retainer 27 of the window plate 23.

As shown in FIG. 1, the hub lock member 14 includes:
Integral side plates 29, 29 extend perpendicularly from both ends of a laterally long plate-like member, and arms 30, 30 extend rearward from the side plates 29, 29. Furthermore, sharp hub stop protrusions 15, 15 protrude from the rear end edge of the hub lock member 14, and these positions correspond to the notches of the hub receivers 13, 13 formed in the window plate 22.

Furthermore, step portions 19, 1 are provided on both sides of the hub locking protrusions 15, 15 on the rear end edge of the hub lock member 14, at positions corresponding to the protrusions 17, 17 of the window plate 23.
9 is formed. As shown in FIG. 3, the illustrated stepped portions 19, 19 are such that the lower surface (the upper surface in FIG. 1) of the hub lock member 14 is recessed, and the upper surface protrudes by this amount.

The base end of a pine needle-shaped spring 16 is fixed to the center of the front edge of the hub lock member 14, and its tip extends forward.

This hub lock member 14 has ribs 31, 31...
... according to the inclination of the upper side thereof, and is mounted in the upper half 11 by being sandwiched between the same ribs 31, 31, and furthermore, the stepped portion 19,
19 is dropped into the recesses 18, 18 of the window plate 23, and this portion is sandwiched between the protrusions 17, 17 and the wall surface of the window plate 24. In this state, hub stop protrusion 1
5 and 15 into the hub receivers 13 and 13 through the notches, and fit the spring 16 into the through hole 26 of the window body 24 and place it between the spring holder 27 and the half body 22, and then Hit the receiver 28.

Also, the arms 30, 30 of the hub lock member 14
are connected by being engaged with the lid 20. As a result, when the lid 20 is closed, the hub retaining protrusions 15 and 1 are
5 locks hub b,b. On the other hand, when the lid 20 opens against the elastic force of the spring 21, the arms 30, 3 of the hub lock member 14 open against the elastic force of the spring 16.
0 is pulled forward, the hub locking protrusions 15, 15 are separated from the hubs b, b, and the lock is released.

[Effect of idea]

As explained above, according to this invention, the hub lock member 14 is
The left and right movement of the is regulated. Therefore, the hub lock member 14 can move smoothly back and forth without rattling, and malfunctions are prevented. Further, when the hub lock member 14 is assembled into the half, it is automatically assembled in an accurate position, making the assembly easy and correctly connected to the lid 20 in the normal position.

[Brief explanation of the drawing]

Fig. 1 is an exploded perspective view of a tape cassette showing an embodiment of this invention, with the tape cassette turned upside down, Fig. 2 is a bottom view of the upper half of the cassette with the lower half removed, and Fig. 3: A sectional view taken along the line A-A in Fig. 2,
FIG. 4 is a bottom view of the upper half of a conventional tape cassette with the lower half removed. 11... Upper half, 12... Lower half, 13...
...Hub holder, 14...Hub lock member, 20...Lid, 31...Rib.

Claims (1)

[Scope of utility model registration request] An upper half 11 and a lower half 12 having a pair of hub receivers 13, 13 inside, both halves 11 and 1
The hub lock member 14 is equipped with a lid 20 that opens and closes the front surface of the lid 20, and a hub lock member 14 that is slidably built into one of the halves 11 and 12 back and forth by guide means and connected to the lid 20.
4 has hub retaining protrusions 15, 15 protruding toward the hub receivers 13, 13, and has elasticity in the direction in which the hub retaining protrusions 15, 15 are inserted into the hub receivers 13, 13. In the tape cassette to which the biased spring 16 is attached, the halves 11 and 12 on the side in which the hub lock member 14 is incorporated are arranged so as to face each other inward from both sides, and the halves 11 and 12 on the upper side face each other. A tape cassette characterized in that ribs 31, 31 which are inclined so that the height decreases inwardly protrude, and a hub lock member 14 is sandwiched between these ribs 31, 31.