JPH0413798Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial application field The present invention relates to a tape cassette, and in particular to a tape that prevents the reel from rotating when not in use by a reel brake provided inside the casing. Regarding cassettes.

〓Effects of the invention〓 This invention provides braking force to the reel, and
When the cassette lid is opened, the reel brake is moved in conjunction with this to release the brake on the reel. Side plate portions are formed on both sides of the reel brake, and the side plate portions are engaged with the cassette lid. The engaging portion is formed, and a thin wall portion is provided at the root portion, that is, the base end of the side plate, and this thin wall portion prevents deformation of the reel brake and reduces friction loss between the reel brake and the casing. This is to eliminate molding distortion and to reduce molding distortion.

〓Prior art〓 A tape cassette has a pair of reels arranged inside the cassette casing, and a magnetic tape is wound around these reels with both ends fixed, and the magnetic tape is released from one reel. As the tape is fed out, it is wound up by the other reel and brought into contact with a magnetic head, thereby performing predetermined recording and/or reproduction. In order to prevent the reel of such a tape cassette from rotating unexpectedly when not in use, a reel brake is movably provided inside the casing as disclosed in, for example, Japanese Utility Model Application No. 60-80576. At times, this reel brake is used to brake the reel to prevent it from rotating.

Problems to be Solved by the Invention With such a reel brake, it is necessary to release the brake on the reel when using this cassette. Therefore, side plates are provided on both sides, and a protrusion on the tip of the arm formed on the side plate is used to interlock with the cassette lid, and when the cassette lid is opened, the reel brake is moved to the non-operating position. I'm trying to move it. However, when the side plates are formed at right angles on both sides, the side plates are deformed to fall inward due to dimensional errors with other engaging parts, and the deformation of the side plates causes the flat plate part of the reel brake to It becomes easier to deform into a bow shape. When the reel brake is deformed into an arched shape due to the deformation of the side plate, the flat plate comes into contact with the casing, causing friction or impeding smooth movement.

The present invention was developed in view of these problems, and it prevents deformation of the reel brake.
Another object of the present invention is to provide a tape cassette in which friction loss does not occur between the reel brake and the casing.

〓Means for solving the problem〓 The present invention has a movable reel brake provided inside the casing, and this reel brake is linked with the cassette lid, so that when the cassette lid is opened, the reel brake moves in conjunction with this. In the tape cassette in which the brake of the reel is released by pressing the reel brake, side plate portions are formed on both sides of the reel brake, and an engaging portion that is engaged with the cassette lid is formed on the side plate portion, and furthermore, the side plate A thin wall portion is provided on at least one of the outer surface and the inner surface of the proximal end of the portion.

〓Operation〓 Therefore, according to the present invention, the flat plate portion of the reel brake is prevented from being deformed into an arched shape after molding due to the thin wall portion formed on at least one of the outer surface and the inner surface of the base end of the side plate portion. This prevents friction loss from occurring between the reel brake and the casing, allowing smooth movement of the reel brake.

〓Example〓 The present invention will be described below with reference to an illustrated example.
Figures 4 to 6 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 is guided by a pair of tape guides 15 formed in the lower shell 12, and is stretched across the bottom opening 16 formed by the notch also formed in the lower shell 12 and the front side opening formed by this 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 comes into contact with the gear-like engagement portion 39 of the reel 13 and performs braking. The reel brake 20 is provided with protrusions 23 at both ends, and when the cassette lid 17 is opened as shown in FIG.
3, the reel brake 20 moves forward,
The brake piece 22 is separated from the reel 13 and the braking is released.

To explain the structure of the reel brake 20 in more detail, as shown in FIGS. 1 to 3, the reel brake 20 has side plate portions 35 on both sides.
are provided at right angles, and an arm 36 is connected to the lower end of this side plate portion 35 so as to extend forward. The protruding piece 23 is formed on the outer side of the distal end of the arm 36, and when the protruding piece 23 engages with the cassette lid 17, the reel brake 20 is activated in conjunction with the opening of the cassette lid. moves forward, and the brake piece 22 of the reel brake 20
The engagement between the reel 13 and the gear-like engagement portion 39 of the reel 13 is released. Further, side plate portions 35 are connected to both sides of the flat plate portion of the reel brake 20 so as to be bent at right angles to the flat plate portion. Moreover, the base end portions of these side plate portions 35 are provided with a thin wall portion 3 extending in the moving direction on at least one of the outer surface and the inner surface, for example, as shown in the figure, on the outer surface.
7 is formed in the shape of a groove, and this thin wall portion 37 prevents the flat plate portion of the reel brake 20 from deforming and enables smooth operation.

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.

The slide plate 24, which is biased in the closing direction by the spring 28, is locked when the bottom opening 16 is opened and closed. That is, as shown in FIG. 6, a slit 2 is provided on one side of the lower shell 12.
A lock lever 30 is formed in a part of the lower shell 12 by this slit 29. The lower surface of the distal end side of the lock lever 30 is configured with a lock portion 31 consisting of a protrusion.
This lock portion 31 is connected to the engagement hole 3 of the slide plate 24.
2 and 33.

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 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, and the brake piece 22
3 and the reel brake is released. Further, as the tape cassette is attached to the tape player, the slide plate 24 is moved by the spring 2.
8, 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.

Further, in this tape cassette, a reel brake 20 as shown in FIGS. 1 to 3 is used, and this reel brake 20 has side plates provided on both sides of the flat plate part at right angles to the flat plate part. A thin wall portion 37 is provided on the outer surface of the proximal end of the portion 35 . Therefore, even if the side plate portion 35 receives a force that deforms as shown by the chain line in FIG. . Therefore, the horizontal portion of the reel brake 20 is prevented from being deformed as shown by the chain line in FIG.

Therefore, with such a configuration, the molding distortion of the reel brake 20 is reduced, or the reel brake 20 is deformed as shown by the chain line and comes into contact with the inner surface of the cassette casing 10, especially the top shell 11, causing friction loss. This will be prevented. Furthermore, since the friction loss is reduced, there is no need to take friction loss into consideration when designing the brake spring 21 that pushes the reel brake 20 in the braking direction, which brings about the advantage that the spring 21 can be designed easily.

<Effects of the invention> As described above, the present invention forms side plate parts on both sides of the reel brake, forms an engaging part 3 to be engaged with the cassette lid on this side plate part, and furthermore, the base end of the side plate part A thin wall portion is provided on at least one of the outer surface and the inner surface. Therefore, according to the present invention, the thin wall portion provided at the base end of the side plate portion prevents the flat plate portion of the reel brake from deforming, thereby making it possible to eliminate friction loss between the reel brake and the casing. Therefore, it is possible to provide a tape cassette with a reel brake that operates smoothly.

[Brief explanation of the drawing]

Fig. 1 is a rear view of a reel brake of a tape cassette according to an embodiment of the present invention, Fig. 2 is an enlarged perspective view of the main part, Fig. 3 is a plan view of the main part, and Fig. 4 is a diagram of the tape cassette. FIG. 5 is an external perspective view of the cassette with the lid open, and FIG. 6 is an exploded perspective view of the cassette. In addition, in the symbols used in the drawings, 10...cassette casing, 17...cassette lid, 20...
Reel brake, 23... projecting piece, 35... side plate part, 36... arm, 37... thin wall part.

Claims (1)

[Scope of utility model registration request] In a tape cassette in which a reel brake is movably provided in a casing, the reel brake is interlocked with a cassette lid, and when the cassette lid is opened, the reel brake is moved in conjunction with this to release the reel brake. , a side plate portion is formed on both sides of the reel brake, and an engaging portion to be engaged with the cassette lid is formed on the side plate portion, and at least one of an outer surface and an inner surface of the base end of the side plate portion is formed. A tape cassette characterized by having a thin wall portion.