JPS6327334Y2 - - 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; The front cover has a rear lid rotatably attached to the lid, a guided pin provided on the rear lid, and a guide groove provided on the cassette casing for guiding the guided pin. When the rear lid is rotated in the opening direction, the guided pin is guided by the guide groove, so that the rear lid is moved away from the front lid while being rotated relative to the front lid. This invention relates to a tape cassette configured to be rotated in the direction of opening the lid.

[Background technology and its problems]

A conventional tape cassette for a video tape recorder of this kind is constructed as shown in FIGS. 1 to 3.

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 into each other from above and below with a plurality of screws (not shown). ) to form a 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.
The magnetic tape 8 is guided by a pair of tape guides 11 integrally molded inside the cassette housing 3 at positions near both left and right ends of the magnetic tape 8, and the magnetic tape 8 is guided through the front opening 1 as shown in FIG.
Passed along 0. Also, the cassette housing 3
has a front opening 1 inside a 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 the interior of the cassette casing 3 by a partition wall 13 integrally molded within the cassette casing 3 and having a substantially U-shaped planar shape. The reels 6 and 7 are partitioned off from each other on the storage side. 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 be coaxial with each other. . As shown in FIG. 2, in order to cover the front side of the magnetic tape 8 passing along the front opening 10, the front cover 4 is attached to the front end side of the left and right side walls 3a of the cassette case 3. The front cover 4 is attached to the cassette housing 3 so that it can be rotated up and down about both fulcrum pins 15. It is being

Next, as shown in FIG. 1, the rear lid 5 has an upper lid 17 integrally molded along its upper edge, and a pair of 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. As shown in FIG. 2, the rear cover 5 is disposed in a recess 12 parallel to the front cover 4 to cover the rear side of the magnetic tape 8 passing along the front opening 10. The rear lid 5 has a pair of fulcrum pins 18, as shown in FIGS. 1 and 2, which are connected to a pair of pins of a pair of protrusions 19 integrally molded on the rear surface of the front lid 4 in the vicinity of both left and right ends 4a. Insertion hole 20
The rear cover 5 is attached to the front cover 4 so as to be able to rotate up and down about both fulcrum pins 18. Furthermore, 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 end portions 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 end portions 13a have a gentle S-shape. A pair of bent guide grooves 21 are provided. Further, the upper ends 21a of both guide grooves 21 are open upward. A pair of protrusions 22 are integrally molded on the rear surface of both left and right edges of the rear cover 5 below both fulcrum pins 18, and a pair of protrusions 22 are integrally molded on the outside of both protrusions 22 so as to be coaxial with each other. A guided pin 23 is loosely fitted into both guide grooves 21. Although not shown, the front lid 4 is configured to be rotated in the closing direction, which is the direction of arrow a in FIG. 2, by a torsion coil spring, and to be locked by a lock lever in the closed lid position. There is.

According to the tape cassette constructed as described above, 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 opened approximately in the direction of arrow a'.
The front opening 10 is opened by rotating 90 degrees. The front cover 4 is then rotated about 90 degrees in the direction of arrow a' from the closed position shown by solid lines in FIG. 2 to the open position shown by phantom lines about both fulcrum pins 15. Therefore, 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 also rotate 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 tape cassette constructed and operated as described above had the following defects.

That is, while handling the tape cassette, the third
As shown in the figure, if a finger is accidentally stuck into the recess 12 of the cassette housing 3, or if the finger is stuck in the same way due to a careless operation, the fulcrum pin 18 of the rear cover 5 and the top cover 17 may It often happens that the approximately central portion between the top and bottom of the device is pressed as shown by arrow A. However, when the tape cassette is not in use, the front cover 4
is locked in the closed position, and the rear lid 5 is also locked in conjunction with the locking of the front lid 4, so the pressing force applied to the rear lid 5 in the direction of arrow A will not escape to other parts. I can't. The rear lid 5 is supported by the front lid 4 by means of fulcrum pins 18 on both left and right edges in the longitudinal direction.
Since it is only supported by the holder, it will flex significantly toward the front as shown by the imaginary line in Fig. 3. For this reason, the fulcrum pin 18 of the rear cover 5 is often
is a pin insertion hole 20 provided in the protruding piece 19 of the front cover 4.
There were defects in that the rear cover 5 would come off, and in some cases, the rear cover 5 would be damaged.

[Purpose of invention]

The present invention attempts to provide a tape cassette that can correct the above-mentioned defects.

[Summary of the idea]

The present invention provides the above-mentioned tape cassette.
A tape cassette in which a reinforcing rib is integrally provided at an intermediate portion between a fulcrum pin portion of the rear lid relative to the front lid and a top lid integrally provided at the upper end of the rear lid,
Even if a pressing force is applied to the middle part between the fulcrum pin of the back lid and the top lid when the lid is closed, the back lid will not bend and the fulcrum pin of the back lid will be inserted through the pin insertion hole of the front lid. This prevents it from coming off or damaging the rear cover.

〔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. 4 and 5. Note that the same structural parts as those of the conventional example shown in FIGS. 1 to 3 are given the same reference numerals, and the explanation thereof will be omitted. Also, here, both ends 13a of the partition wall 13, a pair of left and right fulcrum pins 18, a guide groove 2
1. Although only one of the projecting piece 22 and the guided pin 23 will be explained, the same applies to the other one.

That is, as shown in FIG. A reinforcing rib 30 is integrally provided on the front side of the lid 5 over almost the entire length of the rear lid 5 in the longitudinal direction.

Therefore, according to the tape cassette of the present invention, the fifth
As shown in the figure, even if the pressing force indicated by arrow A is applied to the approximately central portion between the upper and lower sides of the fulcrum pin 18 of the rear lid 5 and the upper lid 17, the portion to which the pressing force is applied is supported by the reinforcing ribs 30. Since it is extremely strong, the rear cover 5 will not bend forward. Therefore, the fulcrum pin 18 of the rear lid 5 is reliably prevented from coming off the pin insertion hole 20 of the front lid 4, and the rear lid 5 is prevented from being damaged. The reinforcing ribs 30 are provided at positions that do not affect the opening of the front lid 4 and the rear lid 5 at all, and the front lid 4 and the rear lid 5 are as shown by the imaginary lines in FIG. The lid is opened in the same way.

In this embodiment, there is a hole in the longitudinal direction of the rear lid 5 on the back side of the reinforcing rib 30, that is, at a substantially central position between the upper and lower sides of the fulcrum pin 18 of the rear lid 5 and the upper lid 17, and on the rear side of the rear lid 5. A cutout surface 31 is provided over almost the entire length. Even if the rear lid 5 shakes a little when the front lid 4 is opened and the rear lid 5 is opened, the cutout surface 31 allows the rear lid 5 to move around the upper half 1 of the cassette housing 3. The corner portion 33 between the upper wall 32 and the partition wall 13 is configured so as not to interfere with each other.

[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 in which a reinforcing rib is integrally provided at the intermediate portion between the fulcrum pin portion of the rear lid relative to the front lid and the upper lid integrally provided at the upper end of the rear lid. According to the present invention, even if a pressing force is applied to the intermediate portion between the fulcrum pin portion of the rear lid and the upper lid, the rear lid will not bend forward. Therefore, it is reliably prevented that the fulcrum pin of the rear lid comes off from the pin insertion hole of the front lid or that the rear lid is damaged, thereby providing an extremely robust tape cassette. Moreover, structurally,
All that is required is to mold the reinforcing ribs on the rear lid, and this can be extremely easily molded by conventional resin processing, so there is no cost increase at all.

[Brief explanation of the drawing]

FIG. 1 is an exploded perspective view illustrating a conventional example of a tape cassette for a video tape recorder, and FIGS. 2 and 3 are enlarged longitudinal sectional side views of the same in the assembled state. 4 and 5 show an embodiment of a tape cassette for a video tape recorder to which the present invention is applied, in which FIG. 4 is an enlarged perspective view of the rear cover, and FIG. 5 is the same as FIG. 2. It is a similar enlarged vertical side view. In addition, in the symbols used in the drawings, 3...
Cassette housing, 4...Front cover, 5...Rear cover, 6,7
... Reel, 8 ... Magnetic tape, 10 ... Front opening, 12 ... Recess, 13 ... Partition wall, 17 ... Upper lid, 18 ... Fulcrum pin, 20 ... Pin insertion hole, 2
1... Guide groove, 23... Guided pin, 30...
...Reinforcing ribs.

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 rotatably attached to the front lid to cover the rear side, a guided pin provided on the rear lid, and a guide groove provided on the cassette housing to guide the guided pin. The front cover is rotated relative to the front cover in order to separate the rear cover to the rear of the front cover by guiding the guided pin in the guide groove when the front cover is rotated in the opening direction. In the tape cassette, the tape cassette is configured such that the lid is rotated together with the front lid in the direction of opening the lid while moving the tape cassette. A tape cassette characterized in that a reinforcing rib is integrally provided in the middle part of the tape cassette.