JPS6327335Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention is a tape cassette that is most suitable for application to a recording/reproducing device such as a video tape recorder, and in particular, the tape cassette accommodated therein can be stored along the front opening. a cassette housing formed by passing the passed tape; a front lid rotatably attached to the cassette housing to cover the front side of the passed tape; A rear lid is rotatably attached to the lid and is opened and closed together with the front lid, and the rear lid is provided with a pair of left and right fulcrum pins integrally formed on both longitudinal edges of the rear lid. The upper cover plate of the front cover is provided with a pair of left and right protrusions integrally molded on the lower surface of the upper cover plate at positions separated from each other in the longitudinal direction, and the rear cover is fixed to the upper cover plate of the front cover by the pair of left and right fulcrum pins. This invention relates to a tape cassette which is inserted into a pair of left and right pin insertion holes provided in a pair of left and right protrusions from the inside of the pair of left and right protrusions and is rotatably supported.

[Background technology and its problems]

A conventional example of a tape cassette for a video tape recorder of this type is constructed as shown in FIGS. 1 to 4.

First, as shown in FIG. 1, a cassette housing 3 composed of upper and lower halves 1 and 2, a front lid 4, and a rear lid 5 are each molded from synthetic resin. Then, the magnetic tape 8 wound on the left and right pair of reels 6, 7 is housed in the upper and lower halves 1, 2, and these upper and lower halves 1, 2 are fitted together from above and below with a plurality of screws (not shown). The cassette housing 3 is constructed by being integrally connected by the cassette housing 3. A front opening 10 is provided on the front surface of the cassette housing 3 over the entire length in the left and right direction, and a pair of openings 10 are formed integrally within the cassette housing 3 at positions near both left and right ends of the front opening 10. The magnetic tape 8 is guided by the tape guide 11 into the front opening 10 as shown in FIG.
There is a path along. In addition, the cassette housing 3 has a front opening 10 inside the pair of tape guides 11.
A recess 12 is formed on the rear side of the cassette casing 3, and this recess 12 is connected to both reels inside the cassette casing 3 by a partition wall 13 integrally molded inside the cassette casing 3 and having a substantially U-shaped planar shape. It is partitioned off to the storage section side of 6 and 7. Note that both the top and bottom of this recess 12 are open.

Next, the front cover 4 has a substantially U-shaped planar shape as shown in FIG. 1, and a pair of fulcrum pins 15 are integrally molded on the inside of both left and right ends 4a so as to have the same axis. Further, as shown in FIG. 2, the front cover 4 is formed into a substantially L-shaped cross section by a front cover plate 24 and an upper cover plate 25. In order to cover the front side and the upper end side of the magnetic tape 8 passing along the front opening 10 with the front cover plate 24 and the upper cover plate 25, respectively, the front cover 4 inserts the pair of fulcrum pins 15 into the cassette case. The front cover 4 is inserted into a pair of pin insertion holes 16 that are provided on the front end side of the left and right side walls 3a of the body 3 so as to be coaxial with each other. It is attached to the cassette housing 3 so that it can rotate.

Next, as shown in FIG. 1, the rear lid 5 is integrally molded with an upper lid 17 along its upper edge, and a pair of left and right fulcrum pins are provided at approximately the center of the left and right edges of the rear lid 5 in the vertical direction. 18 are integrally molded with each other on the same axis. Then, as shown in Fig. 2, the rear cover 5
is disposed in the recess 12 in parallel with the front cover 4 to cover the rear side of the magnetic tape 8 passing along the front opening 10. Furthermore, the upper cover plate 25 of the upper cover 4
A pair of left and right protrusions 19 are integrally molded on the lower surface at positions spaced apart from each other in the longitudinal direction. The rear lid 5 has its left and right fulcrum pins 18 connected to the left and right projecting pieces 19 of the front lid 4, as shown in FIGS. 1 and 2.
The rear lid 5 is attached to the front lid 4 so as to be pivotable up and down about both fulcrum pins 18. There is. Note that the upper lid 17 is arranged to cover the upper surface of the recess 12 as shown in FIG.

Next, as shown in FIGS. 1 and 2, the left and right ends 13a of the partition wall 13 are opposed in parallel from the left and right directions, and the opposing surfaces of the left and right ends 13a are gently bent into an approximately S shape. A pair of guide grooves 21
is provided. Also, the upper end 2 of both guide grooves 21
1a are each open upward. and rear lid 5
A pair of protrusions 22 are integrally molded below both fulcrum pins 18 on the rear surface of both left and right edges of the holder, and a pair of guided pins are integrally molded on the outside of both protrusions 22 so as to be coaxial with each other. 23 is loosely fitted into both guide grooves 21. Although not shown, the front lid 4 is configured to be rotated in the direction of closing the lid, which is the direction of arrow a in FIG. ing.

According to the tape cassette constructed as described above, first, when the cassette is not in use, the front lid 4 is locked in the closed state as shown by the solid line in FIG. In this lid closed state, the magnetic tape 8 that is being passed along the front opening 10 is covered from the front and back by the front lid 4 and the rear lid 5, creating a so-called completely sealed tape cassette. It is becoming.

Next, when the tape cassette is inserted into the video tape recorder, the front cover 4 is unlocked and the front cover 4 is moved approximately in the direction of arrow a', which is the opening direction.
The front opening 10 is opened by rotating 90 degrees. Then, the front cover 4 is rotated approximately 90 degrees in the direction of arrow a' from the closed position shown by the solid line in FIG. 2 to the open position shown by the phantom line in FIG. Since both fulcrum pins 18 of the rear lid 5 are also rotated in the same direction and at the same angle, the rear lid 5 and the front lid 4 are also rotated at the same angle.
The lid is rotated from a closed position shown by a solid line to an open position shown by a phantom line in the figure. At this time, by rotating both fulcrum pins 18 in the direction of arrow a', both guided pins 23 are guided by both guide grooves 21 and moved in the direction of arrow c, and both guide grooves 21 Due to the guiding action of the rear cover 5, the rear cover 5 is rotated about both fulcrum pins 18 with respect to the front cover 4 in the direction of the arrow d, which is the direction of separating the front cover 4 to the rear, and opens in the direction of the arrow a'. It's going to be covered. Also, when the lid is closed,
In the reverse operation when the lid is opened, the front lid 4 is rotated in the direction of arrow a in FIG. 2, and the rear lid 5 is rotated in the direction of arrow d' with respect to the front lid 4. The guided pin 23 also moves within the guide groove 21 in the direction of the arrow c' and is moved back to the lower end of the guide groove 21 shown by a solid line in FIG.

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

That is, while handling a tape cassette, it is often the case that the tape cassette is accidentally dropped. In this case, the front cover 4 of the tape cassette
is locked in the closed position, and the rear lid 5 is also locked in conjunction with the locking of the front lid 4. Therefore, the impact force caused by a fall, etc. is absorbed by the pair of left and right fulcrum pins 1 of the rear lid 5.
A pair of left and right protrusions 19 of the front lid 4 on which 8 is pivotally supported.
Concentrate on. Since the pair of left and right projecting pieces 19 are simply provided integrally with the upper cover plate 25 of the front cover 4, they can easily be broken and damaged at the base 19a, which is the root of the upper cover plate 25. There was a defect.

In this type of tape cassette, the rear cover 5 is attached by being inserted into the inside of the pair of left and right projecting pieces 19 of the front cover 4 from below, as shown by the arrow e in FIG. At this time, as shown in FIG. 4, first, one of the fulcrum pins 18 is inserted obliquely into the pin insertion hole 20 of one of the projecting pieces 19 from the direction of arrow f, and then
By pressing in the direction, one of the projecting pieces 19 is bent against elasticity. Next, in this state, use one fulcrum pin 18 as a rotation fulcrum, rotate the rear cover 5 in the direction of arrow g, and insert the other fulcrum pin 18 into the pin insertion hole 20 of the other protrusion 19. It was configured like this.

Therefore, when attaching the rear cover 5 to the front cover 4, it is necessary that the pair of left and right protrusions 19 of the front cover 4 be bent, and in order to prevent the pair of left and right protrusions 19 from being damaged. If the pair of left and right projecting pieces 19 were reinforced, the rear cover 5 would become impossible to attach to the front cover 4, which is a contradictory problem.

[Purpose of invention]

The present invention aims to provide a tape cassette that can solve the above-mentioned problems.

[Summary of the idea]

The present invention provides the above-mentioned tape cassette.
This tape cassette is provided with a reinforcing portion that integrally connects the bases of the pair of left and right protrusions and the upper cover plate of the front lid, and the pair of left and right protrusions can be made extremely strong. However, the rear cover can be attached to the front cover very easily.

〔Example〕

An embodiment in which the present invention is applied to a tape cassette for a video tape recorder will be described below with reference to FIGS. 5 and 6. Note that structural parts that are the same as those of the conventional example shown in FIGS. 1 to 4 are designated by the same reference numerals, and their explanations will be omitted.

That is, in the present invention, as shown in FIGS. 5 and 6,
Reinforcing portions 27 are provided at inner portions of the pair of left and right projecting pieces 19 that face each other. This reinforcement part 27
is almost triangular in shape, with a pair of left and right protrusions 1
9 and the upper cover plate 25 of the front cover 4. Further, as shown in FIG. 6, the upper cover plate 25 of the front cover 4 is provided with a pair of left and right projecting pieces 19.
, the thickness t ₂ is the thickness of the conventional upper cover plate 25 (fourth
It is formed thinner than t ₁ ) in the figure.

According to the present invention configured as described above, first, by providing the reinforcing portion 27, the pair of left and right projecting pieces 19 of the front lid 4 become extremely strong. Therefore, it is possible to reliably prevent the pair of left and right projecting pieces 19 from being easily broken and damaged due to impact force such as a fall.

Next, when attaching the rear lid 5 to the front lid 4, as shown in FIG. 6, the upper lid plate 25 of the front lid 4 is first pressed between the pair of left and right projections 19 in the direction of the arrow h.
At this time, the reinforcing portions 27 are provided on the inner portions of the pair of left and right protrusions 19 that face each other, and since the upper cover plate 25 is formed thin, the upper cover plate 25 is provided between the pair of left and right protrusions. It can be easily bent downward between the pieces 19. The pair of left and right projecting pieces 19 reinforced with respect to the upper cover plate 25 do not bend by themselves, but when the upper cover plate 25 bends, the upper cover plate 2
5 and the lower end side 1 of these pair of left and right projecting pieces 19.
9b is opened outward to the left and right. In this state, the rear lid 5 is pushed in from the direction of arrow i, and then the pair of left and right fulcrum pins 18 of the lid 5 are inserted into the pair of left and right pin insertion holes 20 of the pair of left and right protrusions 19, respectively. Therefore, the rear cover 5 can be attached to the front cover 4 very easily.

Note that the reinforcing portion 27 referred to in the present invention is not limited to that shown in the embodiments, and may have various shapes.

[Application example]

Although one embodiment of the present invention has been described above, the present invention is applicable to tape cassettes for various recording and reproducing devices other than video tape recorders and various other information processing devices.

[Effect of idea]

As described above, the present invention is a tape cassette provided with a reinforcing portion that integrally connects the bases of the pair of left and right protrusions and the upper cover plate of the front lid. Therefore, according to the present invention, the pair of left and right protrusions of the front cover are made extremely strong, and it is possible to reliably prevent the pair of left and right protrusions from being easily broken and damaged by the impact force of a fall or the like. . At the same time, it is also possible to attach the rear cover to the front cover very easily, which was a problem that was contradictory to the reinforcement of the pair of left and right projecting pieces.

[Brief explanation of drawings]

Fig. 1 is an exploded perspective view illustrating a conventional example of a tape cassette for a video tape recorder, Fig. 2 is an enlarged longitudinal sectional side view of the same as the above in a completed state, and Fig. 3 shows the direction in which the rear cover is attached to the front cover. FIG. 4 is an enlarged cross-sectional view of the main parts, and is a cross-sectional view taken along the line of FIG. 3 for explaining a method of attaching the rear cover to the front cover. 5 and 6 show an embodiment of a tape cassette for a video tape recorder to which the present invention is applied, in which FIG. 5 is an enlarged perspective view of the main parts, and FIG.
It is a sectional view similar to the figure. In addition, in the symbols used in the drawings, 3...
Cassette housing, 4...Front cover, 5...Rear cover, 8...
Magnetic tape, 10... Front opening, 18... Fulcrum pin, 19... Protrusion piece, 19a... Base of protrusion piece, 19
b...Lower end side of protrusion, 20...Pin insertion hole, 24
...Front cover plate, 25...Top cover plate, 27...Reinforcement part,
It is.

Claims (1)

[Scope of utility model registration request] A cassette housing in which a stored tape is passed along a front opening; a front lid rotatably attached to the cassette housing to cover the front side of the passed tape; and a front lid rotatably attached to the cassette housing to cover the front side of the passed tape; A rear lid is rotatably attached to the front lid to cover the rear side and is opened and closed together with the front lid. A fulcrum pin is integrally molded, a pair of left and right projecting pieces are integrally molded on the lower surface of the upper cover plate of the front lid at positions separated from each other in the longitudinal direction, and the rear lid is fixed to the upper lid plate of the front lid. In the tape cassette, the tape cassette is rotatably supported by being inserted into a pair of left and right pin insertion holes provided in the pair of left and right protrusions of the front lid from the inside of the pair of left and right protrusions by means of a fulcrum pin, A tape cassette characterized in that a reinforcing portion is provided that integrally connects the bases of the pair of left and right projecting pieces and the upper cover plate of the front lid.