JPH0418135Y2 - - Google Patents

Description

[Detailed explanation of the idea] [Industrial application field]

The present invention relates to a tape cassette, and in particular, opens the cassette lid attached to the front side of the casing, inserts the tape drawer means through the opening on the bottom side, pulls out the tape-shaped recording medium, and in this state makes it face to face with the head. The present invention relates to a tape cassette for recording and/or playback.

[Background technology and its problems]

For high-density recording and/or playback, such as PCM audio, it is necessary to use a rotating head to increase the relative speed of the head to the magnetic tape. Therefore, tape cassettes used for such recording and reproduction must be capable of pulling out the magnetic tape from the casing.
Therefore, a magnetic tape is hung inside the cassette lid, and when the cassette lid is opened, a tape pull-out means is inserted through the bottom opening to pull out the magnetic tape, and this magnetic tape is wound around the head drum for recording and playback. It becomes like this. In such a tape cassette, there is a possibility that foreign matter may enter through the bottom opening into which the tape drawing means is inserted and stain or damage the tape. Therefore, it has been considered to attach a slide plate so as to cover the bottom opening in an openable and closable manner. However, if the slide plate is simply mounted in a slidable manner, the slide plate will play in the vertical direction perpendicular to the sliding direction, thereby impairing the quality of the tape cassette.
Therefore, it is possible to reduce the dimensional tolerance to reduce this play, but this would require the use of high-precision parts, which would increase costs, or the slide plate would not be able to slide smoothly. This causes the inconvenience of not being able to do so.

[Purpose of invention]

The present invention was developed in view of these problems, and the sliding plate that covers the bottom opening into which the tape drawing means is inserted in an openable/closable manner does not rattle in the vertical direction and slides smoothly. It is an object of the present invention to provide a tape cassette which is capable of performing dynamic movements.

[Summary of the idea]

In the present invention, a tape-shaped recording medium is wound around a reel and stored in a casing consisting of an upper shell and a lower shell, and the tape-shaped recording medium is stored in a rotatable cassette lid attached to the front side of the casing. A slide plate is attached to the lower side of the lower shell, and a slide plate is attached to the lower side of the lower shell, and a slide plate is attached to the lower side of the lower shell to cover the opening on the bottom side of the casing so as to be openable and closable, and the tape-shaped recording medium is pulled out by inserting a tape pull-out means inside the casing. A spring member having one end of the winding portion attached to the seat and the other end engaged with a spring catch of the slide plate urges the slide plate in a direction to close the opening on the bottom side by a first biasing force. In the tape cassette, the mounting surface of the mounting seat on which one end of the spring member is attached is inclined with respect to the slide plate, so that the slide plate is attached to the lower shell of the spring member attached to the mounting seat. A tape cassette, characterized in that a second biasing force is generated in the direction of pressure contact, and the spring member absorbs vertical play of the slide plate with respect to the lower shell,
This eliminates play in the height direction of the slide plate, that is, in the thickness direction of the cassette, without increasing dimensional tolerances.

【Example】

The invention will now be explained with reference to the illustrated embodiments. Figures 1 to 3 relate to the first embodiment of the present invention.
1 shows a tape cassette for PCM audio, which tape cassette includes a cassette casing 10. Cassette casing 10
consists of an upper shell 11 and a lower shell 12, and by combining these, a flat rectangular parallelepiped-shaped cassette casing 10 is assembled. A pair of reels 13 are disposed within the casing 10, and a magnetic tape 14 is wound around these reels 13 with both ends fixedly attached. The magnetic tape 14 is guided by a pair of tape guides 15 formed in the lower shell 12, and is stretched across a bottom opening 16 consisting of a notch also formed in the lower shell 12. A cassette lid 17 is attached to the front side of the casing 10 consisting of the pair of shells 11 and 12, and the cassette lid 17 guides and wraps around the pair of tape guides 15. The magnetic tape 14 is protected. The cassette lid 17 is provided with pins 18 at both ends thereof, and the pins 18 are received in step portions 19 formed on both sides of the lower shell 12, so that the cassette lid 17 is rotatably supported by the casing 10. . A reel brake 20 is disposed below the top shell 11 of the casing 10, and this brake 20 is connected to a brake spring 21.
The brake piece 22 contacts the reel 13 and performs braking.
The reel brake 20 has protrusions 23 on both ends.
As shown in Figure 2, the cassette lid 1
7 is opened, the reel brake 20 moves forward by the protruding piece 23, and the brake piece 22
is separated from the reel 13, and the brake is released. A slide plate 24 is slidably attached to the lower side of the lower shell 12 constituting the cassette casing 10, and engaging portions 25 formed on both sides of the slide plate 24 engage the cassette casing 10. It is engaged with engagement grooves 26 formed on both sides of. The slide plate 24 is biased by a spring so as to close the bottom opening 16 of the lower shell 12. That is, a spring hook 27 is provided at the front end of the slide plate 24, and the tip of a spring 28 is locked to this spring hook 27. To explain the structure of this spring 28 in more detail,
As shown in Figures 4 and 5, Loisiel 1
2, for example, the right tape guide 1.
A cylindrical holding portion 29 is integrally provided in the vicinity of 5. This holding part 29 is a winding part 30 of the spring 28.
It is designed to hold. The end portion 31 of this winding portion 30 is adapted to be received in a slit 32 formed in the holding portion 29. What must be noted here is that, as shown in FIG. The spring 28 is the slide plate 2
Not only does the first biasing force occur in the sliding direction of 4, but also the second biasing force is generated in a direction perpendicular to this. In the above configuration, when this tape cassette is installed in a tape player, the cassette lid 17 on the front side is opened, as shown in FIG.
The magnetic tape 14 stretched between the two is exposed. At the same time, by opening the cassette lid 17,
The protruding piece 23 of the reel brake 20 is pushed forward,
The brake piece 22 is separated from the reel 13 and the reel brake is released. Further, as the tape cassette is mounted on the tape player, the slide plate 24 moves backward against the spring 26, and the bottom opening 16 formed in the lower shell 12 is opened. Therefore, the tape pull-out means is inserted into the area between the pair of tape guides 15 from the bottom opening 16, and the tape pull-out means moves forward to pull out the magnetic tape 14 between the tape guides 15. It is then wrapped around the rotating head drum of the tape player. In this state, as the magnetic head rotates, the magnetic tape 14 runs so as to be fed out from one reel 13 and wound onto the other reel 13, thereby performing high-density recording/and/or reproduction. You will be able to do it. Furthermore, in this tape cassette, the slide plate 24 is slidably biased by a spring 28 in a closing direction, that is, toward the front. As shown in FIGS. 4 and 5, the spring 28 that biases the slide plate 24 to slide is attached to a cylindrical holding portion 29.
is held by. And this holding part 29
As shown in FIG. 5, the mounting seat 33 is formed of an inclined surface, so that in a natural state, the spring 28 is directed upward as shown by the chain line in FIG. Therefore, by locking such a spring 28 to the locking portion 27 of the slide plate 24, the slide plate 24 receives a second upward biasing force. In other words, this slide plate 2
4 is subjected to a force such that it is pressed against the lower surface of the lower shell 12. Since the slide plate 24 is pressed against the lower surface of the cassette casing 10 by receiving the second biasing force from the spring 28, play between the slide plate 24 and the casing 10 can be reduced. This makes it possible to absorb the tape cassette, thereby improving the quality of the tape cassette. In addition, by absorbing the looseness of the slide plate 24 with the spring 28, there is no need to make the dimensional accuracy of the slide plate 24 relative to the casing 10 higher than necessary, thereby preventing an increase in the cost of parts. It becomes possible to do so.
Furthermore, since there is no need to make the dimensional accuracy between the casing 10 and the slide plate 24 higher than necessary, it is possible to prevent the slide plate 24 from becoming too tight and unable to slide. Moreover, the spring 2 absorbs the play of this slide plate 24.
Since 8 also serves as a spring that urges the slide plate 24 forward, the number of parts does not increase.

[Effect of the idea]

As described above, in the present invention, by slanting the mounting surface of the mounting seat on which one end of the spring member is attached with respect to the slide plate, the spring member attached to the mounting seat has a second surface in the direction of pressing the slide plate into contact with the lower shell. This spring member absorbs the vertical play of the slide plate relative to the lower shell. Therefore, according to the present invention, it is possible to reliably prevent rattling of the slide plate in the height direction of the slide plate, that is, in the thickness direction of the casing of the tape cassette, without increasing the dimensional accuracy of the parts. Therefore, it is possible to improve the quality of the tape cassette, and the slide plate does not slide too hard.
It becomes possible to provide a tape cassette with a slide plate that slides smoothly.

[Brief explanation of drawings]

FIG. 1 is an external perspective view of a tape cassette according to a first embodiment of the present invention, FIG. 2 is an external perspective view of the tape cassette with its lid open, and FIG. 3 is an exploded perspective view of the tape cassette. FIG. 4 is an exploded perspective view showing the mounting structure of the spring that biases the slide plate, and FIG. 5 is a front view of the same. In addition, in the symbols used in the drawings, 10...Cassette casing, 13...Reel, 14...Magnetic tape, 16...Bottom opening, 17...Cassette lid, 24...Slide plate, 27...Spring hook, 2
8... Spring, 29... Cylindrical holding portion, 33... Mounting seat (slanted surface).

Claims (1)

[Scope of utility model registration request] A tape-shaped recording medium is wound around a reel and stored in a casing consisting of an upper shell and a lower shell, and the tape-shaped recording medium is hung inside a rotatable cassette lid attached to the front side of the casing. A slide plate is attached to the lower side of the lower shell to cover the opening on the bottom side of the casing in an openable and closable manner, into which a tape drawing means is inserted and the tape-shaped recording medium is drawn out, and one end of the sliding plate is attached to the lower side of the lower shell. The winding portion is attached and a spring member whose other end is engaged with a spring hook of the slide plate urges the slide plate in a direction to close the opening on the bottom side by a first urging force. In the tape cassette, the mounting surface of the mounting seat on which one end of the spring member is mounted is inclined with respect to the slide plate,
A second biasing force is generated in the spring member attached to the mounting seat in the direction of pressing the slide plate against the lower shell, and the spring member absorbs vertical play of the slide plate with respect to the lower shell. A tape cassette characterized by: