JPH0325353Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a tape cassette, and in particular, the cassette lid attached to the front side of the casing is opened and a tape drawer is inserted through the bottom opening to extract a tape-shaped recording medium. The present invention relates to a tape cassette in which recording and reproduction are performed while the tape cassette is pulled out and brought into contact with a head.

〓Background technology and its problems〓 For example, when performing high-density recording and reproduction such as PCM audio, it is necessary to increase the relative speed between the magnetic head and the magnetic tape.
For this purpose, for example, a rotating head is used to perform recording and reproduction. In a tape cassette used for such rotary head type recording/reproduction, a tape ejecting means is inserted through an opening formed at the bottom of the cassette casing, the magnetic tape is pulled out, and the magnetic tape is mounted around the rotary head drum. In this step, the magnetic tape is run while the head and the magnetic tape are brought into contact with each other.

If the bottom opening of the casing into which the tape pull-out means is inserted is left as is, foreign objects may enter through this opening when not in use and damage the magnetic tape wrapped inside the cassette lid. It may be damaged or defaced. Therefore, it is considered to attach a slide plate to cover this bottom opening. Moreover, in order to ensure that the slide plate is properly regulated at a predetermined position, an elastic piece 1 is formed on the underside of the cassette casing as shown in FIG. It is engaged with the engagement opening 4 of the plate 3, thereby correctly regulating the position of the slide plate 3 in the open or closed state. In order to prevent the elastic piece 1 from being deformed or broken when the engaging claw 2 is strongly pressed from below, a limiter 6 consisting of a protrusion is provided on the upper shell 5, and is shown in chain lines in FIG. When the elastic piece 1 is deformed to the position shown by, the protrusion 6 prevents further deformation.

According to such a tape cassette, when the upper shell 5 provided with the protrusion 6 constituting the limiter is assembled onto the lower shell 7, the tape cassette is previously placed on the lower shell 7 in a state where it is wound on a reel. The limiter 6 must be assembled so that it does not interfere with the magnetic tape. Furthermore, the limiter 6 and the magnetic tape must be assembled so that the positional relationship between them is correct. Therefore, it is necessary to prevent the magnetic tape from loosening during assembly, which reduces assembly work efficiency. Furthermore, if the upper shell 5 is assembled on the lower shell 7 with the magnetic tape loosened, the magnetic tape and limiter 6 may interfere or their positional relationship may be reversed, resulting in defective products. there is a possibility.

〓Purpose of the invention〓 The present invention was made in view of the above-mentioned problems, and uses a limiter to restrict the amount of deformation of an elastic piece provided with an engaging pawl for locking the slide plate in a predetermined position. It is an object of the present invention to provide a tape cassette that does not impair the operability of assembly or produce defective products.

〓Summary of the invention〓 The present invention involves winding a tape-shaped recording medium around a reel and storing it in a casing, and hanging the tape-shaped recording medium inside a cassette lid attached to the front side of the casing. When the cassette lid is opened, the tape drawing means is inserted through the opening on the bottom side of the casing inside the cassette lid to pull out the tape-shaped recording medium, and A slide plate is installed to open and close the opening on the bottom side of the casing, and an engaging claw at the tip of an elastic piece formed at the bottom of the casing is engaged with an engaged portion of the slide plate. In the tape cassette in which the slide plate is locked at a predetermined position, a limiter consisting of a protrusion is provided on the elastic piece, and the limiter is brought into contact with the upper part of the casing to regulate the amount of deformation of the elastic piece. The tape cassette is characterized by having a limiter on the elastic piece, which improves operability during assembly, increases productivity, and prevents the production of defective products. This is what I did.

〓Example〓 The present invention will be described below with reference to an illustrated example.
Figures 1 to 3 are PCMs according to an embodiment of the present invention.
This shows a tape cassette for audio, and this tape cassette has cassette casing 1.
It is equipped with 0. The cassette casing 10 is composed 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. Magnetic tape 14 is Loisiel 1
The tape guide 15 is guided by a pair of tape guides 15 formed in the lower shell 12, and is stretched across a bottom opening 16 formed by a cutout also formed in the lower shell 12 and a front opening formed by the bottom opening. Become.

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 covers the opening on the front side of the casing and also covers a pair of tapes. The magnetic tape 14, which is guided and wrapped around the guide 15, 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.

Next, the above slide plate 2 of this tape cassette
To explain the locking mechanism for regulating the position of cassette casing 10, as shown in FIGS. This elastic piece 29 is formed by providing a notch 30 in a part of the lower shell 12, and as shown in FIG. An engaging claw 31 is integrally formed. This engaging claw 31 is connected to the slide plate 24.
A pair of engaged openings 32 and 33 formed in
by selectively engaging one of the
This slide plate 24 is designed to be locked in an open state or a closed state, respectively. A limiter 34 consisting of a protrusion is integrally formed at the top of the tip end of the elastic piece 29, and the amount of upward deformation of the elastic piece 29 is regulated by the limiter 34.

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 pair of tape guides 15 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 28, 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, as shown in FIGS. 4 and 5, it is slidably supported by an elastic piece 29 that is integrally connected to the lower shell 12 that constitutes the cassette casing 10. The position of the slide plate 24 is regulated. That is, for example, as shown in FIG. 5, when the slide plate 24 closes the bottom opening 16, the engaged opening 33 of the slide plate 24 and the engaging claw 31 of the elastic piece 29 are engaged with each other. This allows the slide plate 24 to be locked in the closed state.
Further, when the slide plate 24 is opened, the engaging claw 31 of the elastic piece 29 engages with the engaged opening 32 on the front end side of the slide plate 24. Therefore, in this case, the slide plate 24 will be locked in the open state.

The elastic piece 29, which includes the engaging pawl 31 that locks when the slide plate 24 is opened or closed, will not deform when the engaging pawl 31 receives a large force from below to above. Or it may be damaged. Therefore, in order to prevent such deformation and damage, a limiter 34 consisting of a protrusion is provided on the upper part of the elastic piece 29.
When the elastic piece 29 deforms to the position shown by the chain line in FIG. 5, the limiter 34 comes into contact with the lower surface of the upper shell 11 and prevents the elastic piece 29 from further deforming. Therefore, according to such a configuration, deformation and breakage of the elastic piece 29 can be prevented.

Moreover, since the limiter 34 is connected to the elastic piece 29 that is integrally provided to the lower shell 12, the magnetic tape 14 is arranged so as to be in the correct positional relationship with respect to the limiter 34, as shown in FIG. If this is done, there will be no interference between the limiter 34 and the magnetic tape 14 when the upper shell 11 is installed on the lower shell 12, and the positional relationship between the limiter 34 and the magnetic tape 14 will always be correct. It will be assembled. Therefore, by providing the limiter 34 on the elastic piece 29 on the lower shell 12 side,
The operability during assembly is significantly improved, and a tape cassette with excellent productivity can be provided. Alternatively, it is possible to prevent the occurrence of defective products due to interference between the magnetic tape 14 and the limiter 34 or their positional relationship being reversed.

〓Effects of the invention〓 As described above, in the present invention, a limiter consisting of a protrusion is provided on the elastic piece, and this limiter is brought into contact with the upper part of the casing to regulate the amount of deformation of the elastic piece. . Therefore, according to the present invention, the cassette casing consists of upper and lower shells, the tape-shaped recording medium is placed on the lower shell, and when the upper shell is assembled in this state, the limiter and the tape-shaped recording medium are There will be no interference between the two, or the positional relationship between the two will be reversed, increasing assembly productivity. Furthermore, it is possible to prevent the occurrence of defective products due to interference or positional relationship between the tape-shaped recording medium and the limiter.

[Brief explanation of the drawing]

FIG. 1 is an external perspective view showing a tape cassette according to an embodiment of the present invention, FIG. 2 is an external perspective view of the tape cassette with the cassette lid opened, and FIG.
The figure is an exploded perspective view of this tape cassette, FIG. 4 is a plan view of the magnetic tape placed on the lower shell, FIG. 5 is an enlarged sectional view taken along the line ~ in FIG. 4, and FIG. FIG. 5 is a cross-sectional view similar to FIG. 5; In addition, in the symbols used in the drawings, 10...cassette casing, 11...appashiel, 12...lower shell, 13...reel, 14...magnetic tape, 16...bottom opening, 1
7...Cassette lid, 24...Slide plate, 29...
...elastic piece, 31...engaging claw, 32, 33...opening for engagement, 34...limiter (protrusion).

Claims (1)

[Scope of utility model registration request] A tape-shaped recording medium is wound around a reel and stored in a casing, and the tape-shaped recording medium is wrapped around the inside of a cassette lid attached to the front side of the casing, and the cassette lid is opened. A tape drawer is inserted through an opening on the bottom side of the casing inside the cassette lid to pull out the tape-shaped recording medium, and an opening on the bottom side of the casing inside the cassette lid can be opened and closed. Attach a sliding plate to cover the casing, and lock the sliding plate in a predetermined position by engaging the engaging claw at the tip of the elastic piece formed at the bottom of the casing with the engaged portion of the sliding plate. In such a tape cassette, a limiter consisting of a protrusion is provided on the elastic piece,
A tape cassette characterized in that the limiter is brought into contact with the upper part of the casing to restrict the amount of deformation of the elastic piece.