JPH0447816Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Field of Application The present invention relates to a tape cassette, and more particularly to a tape cassette in which the reel is braked by a reel brake movably disposed within the casing.

〓Summary of the invention〓 The present invention involves inserting the cylindrical protrusion of the upper shell into the long hole of the reel brake which is movably arranged in the cassette casing in order to brake the reel, and welding its tip. The reel brake is movably attached to the inside of the upper half, and a protrusion is provided on one of the inner surfaces of the upper half of the reel brake and the cassette cassette, and a guide groove is provided on the other. The reel brake is moved while the strip and the guide groove are engaged, and the movement of the reel brake is smoothly guided and the play of the reel brake in a direction perpendicular to the direction of movement is eliminated. It is.

<Prior art> A tape cassette has a reel disposed inside a cassette casing, and a magnetic tape is wound around the reel. The unwound magnetic tape is brought into contact with the magnetic head and wound by the other winding reel, thereby performing predetermined recording and/or reproduction. When such a tape cassette is not in use, a reel brake is provided within the casing to prevent the reel from rotating due to vibrations from the outside and loosening the magnetic tape. Such a reel brake is known, for example, from Japanese Utility Model Application Publication No. 60-80576. This reel brake is adapted to move in accordance with the rotation of the cassette lid, and when the cassette lid is opened, the brake on the reel is released in conjunction with this.

〓Problems to be solved by the invention〓 Such a reel brake must be moved correctly in response to, for example, opening and closing of the cassette lid, and accordingly brake the reel or release the brake. That's what I do. However, in a direction perpendicular to this direction of movement, that is, in the width direction of the reel brake, it is preferable to minimize backlash as much as possible to ensure stable operation. If the backlash is large in the direction perpendicular to the direction of movement, the reel will not be properly braked and the magnetic tape may become loose.

The present invention has been developed in view of these problems, and is designed to allow the reel brake to move smoothly in a predetermined direction of movement, and to reliably prevent rattling of the reel brake in a direction perpendicular to this direction. The object of the present invention is to provide a tape cassette that has the following characteristics.

〓Means for solving the problem〓 The present invention arranges a reel wound with a tape-shaped recording medium and a reel brake for braking the reel in a cassette casing consisting of upper and lower shells,
The reel brake is interlocked with the opening/closing operation of a cassette lid that opens and closes the front opening of the cassette casing, and when the cassette lid is closed, the reel brake is actuated back to brake the reel. In the tape cassette, the braking of the reel brake is released in conjunction with opening of the cassette lid, wherein the reel brake has a long hole extending in the sliding direction thereof, and the reel brake has an elongated hole provided in the upper shell. A support member is engaged with the elongated hole to prevent the reel from coming off, thereby slidably attaching the reel brake to the upper shell, and connecting the reel brake to the inner part of the upper shell. A protrusion extending in the sliding direction of the reel brake is provided on one side, and a guide groove facing the protrusion and having approximately the same width as the protrusion is provided on the other side, and the protrusion and the guide groove are engaged. The reel brake is moved above the reel along the inner surface of the upper shell while moving the reel.

〓Operation〓 The reel brake is slidably attached to the inner surface of the upper shell by engaging the support member provided on the upper shell with the elongated hole of the reel brake and preventing it from coming off. You will be able to do it. When the cassette lid, which covers the front opening of the cassette casing so that it can be opened and closed, is opened, the reel brake moves while being guided by the guide groove and the protrusion, thereby releasing the braking of the reel brake. . Further, when the cassette lid is closed, the reel brake is moved back along the inner surface of the cassette casing while being guided by the protrusion and the guide groove, and the reel is braked.

〓Example〓 The present invention will be described below with reference to an illustrated example.
Figures 3 to 5 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 arranged inside the casing 10, and these reels 1
A magnetic tape 14 is wound around the magnetic tape 3 with both ends fixedly attached. Magnetic tape 14 is Loisiel 12
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 in the lower shell 12 and the front opening formed by the bottom opening. .

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 engaging portion 39 of the reel 13, and the braking is released.

To explain the support structure of the reel brake 20 in more detail, as shown in FIGS. 1 and 2, the reel brake 20 is provided with elongated holes 35 on the left and right sides thereof, respectively, extending in the direction of movement. On the other hand, a pair of left and right cylindrical projections 36 are formed on the lower surface of the upper shell 11 of the cassette casing 10. These protrusions 36 are engaged with the elongated holes 35, and the upper ends of the cylindrical protrusions 36 protruding from the elongated holes 35 are crushed by heat welding, whereby the reel brake 20
is adapted to be coupled to the casing 10. In addition, reel brake 20 Atsupashiel 1
A pair of protrusions 37 extending in the direction of movement are provided on the surface of the first side.
are formed, and these protrusions 37 are adapted to be engaged with guide grooves 38 formed on the inner surface of the top shell 11. That is, when the reel brake 20 moves, it is guided by the protrusion 37 and the guide groove 38.

As shown in FIG. 5, on the lower side of the lower shell 12 constituting the cassette casing 10,
A slide plate 24 is slidably attached, and engaging portions 25 formed on both sides of the slide plate 24 are engaged with engagement grooves 26 formed on both sides of the cassette casing 10. ing. 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. 5, 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 constituted by 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 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, and the brake piece 22 is separated from the gear-shaped engagement portion 39 of the reel 13, thereby releasing the reel brake. . Furthermore, as this tape cassette is attached to the tape player, the slide plate 24 retreats backward against the spring 28.
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 the tape cassette according to this embodiment, as shown in FIGS. 1 and 2, the reel brake 20 for braking the reel 13 is provided with a pair of left and right elongated holes 35, and these elongated holes 35 The upper end of the cylindrical protrusion 36 inserted into the cylindrical projection 36 is crushed by a method such as heat welding, so that the reel brake 20
It is now being combined with

Since the reel brake 20 is connected to the atupashiel 11 in advance in this way, assembly becomes easy and the time required for assembly can be shortened. That is, when the Atsupashiel 11 and the reel brake 20 are separated, the reel 13 is arranged above the lower shell 12, the reel brake 20 is placed on top of the reel, and the Atsupashel 11 is gently placed on top of it. Therefore, the assembly required many man-hours and had the drawback of requiring skill. However, if the reel brake 20 is connected to the atsushiel 11 in advance as in this embodiment, such drawbacks can be overcome.

Further, this reel brake 20 is provided with a protrusion 37 extending in the movement direction on the upper surface thereof and in a portion facing the lower surface of the atsupashiel 11, and this protrusion 37 is formed in a guide groove 38 formed on the lower surface of the atsupashiel 11. It is becoming more and more engaged. Therefore, the guide mechanism consisting of the protrusions 37 and the guide grooves 38 allows the reel brake 20 to move smoothly in the front and back direction, thereby making it possible to brake and release the brake on the reel 13. It becomes possible to perform the braking operation reliably, and it becomes possible to provide a reel brake that performs the braking operation accurately.

Furthermore, these protrusions 37 and guide grooves 38 prevent the reel brake 20 from wobbling in a direction perpendicular to its moving direction, that is, in the width direction of the cassette casing 10. Therefore, the reel brake 20 is shaken in the direction perpendicular to the moving direction, and the brake piece 22 is reliably prevented from coming off the gear-like engagement portion 39 of the reel 13. In addition, since the lateral direction of the reel brake 20 is restricted by the protrusion 37 and the guide groove 38, it is no longer necessary to guide the reel brake 20 by the side wall of the Atsupashiel 11, and both ends of the reel brake 20 are It becomes possible to make the dimensional tolerances of the parts rough.

Effects of the invention As described above, in the present invention, the reel brake has an elongated hole extending in its sliding direction, and the support member provided in the upper shell is engaged with the elongated hole to prevent it from coming off. As a result, the reel brake is slidably attached to the upper shell, and one of the reel brake and the upper shell is provided with a protrusion extending in the sliding direction of the reel brake, and the other is provided with a protrusion extending in the sliding direction of the reel brake. A guide groove is provided opposite to the protrusion and has approximately the same width as the protrusion, and the reel brake is moved above the reel along the inner surface of the upper shell while the protrusion and the guide groove are engaged. This is what I did.

Therefore, by engaging the support member provided in the cassette casing with the elongated hole of the reel brake to prevent it from coming off, the reel brake can be slidably attached to the inner surface of the upper shell. A cassette casing can be assembled by combining an upper shell with a built-in reel brake and a lower shell.
Therefore, while installing the reel on the lower shell,
The troublesome assembly work of placing the reel brake on top of the reel brake and then gently covering it with the Atsupashiel is now freed, and the ease of assembly is improved.

The reel brake, which is slidably attached to the inner surface of the Atsupashiel by a support member, has a protrusion extending in the sliding direction of the reel brake and a guide groove that faces the protrusion and has approximately the same width as the protrusion. Since the reel brake is guided by It becomes possible to eliminate play of the reel brake in the direction perpendicular to the direction.

[Brief explanation of the drawing]

Fig. 1 is a cross-sectional view of a main part showing the mounting structure of a reel brake of a tape cassette according to an embodiment of the present invention, Fig. 2 is an exploded perspective view of the same, Fig. 3 is an external perspective view of this tape cassette, and Fig. 4 is a perspective view of the tape cassette. This figure is an external perspective view of the cassette with the lid open, and FIG. 5 is an exploded perspective view of the same. In addition, in the symbols used in the drawings, 10...cassette casing, 17...cassette lid, 20...
Reel brake, 23... protrusion, 35... long hole,
36...Cylindrical protrusion, 37...Protrusion, 38...Guide groove.

Claims (1)

[Claims for Utility Model Registration] A reel wound with a tape-shaped recording medium and a reel brake for braking the reel are arranged in a cassette casing consisting of upper and lower shells, and the front opening of the cassette casing can be opened and closed. The reel brake is interlocked with the opening/closing operation of the cassette lid covering the reel, and when the cassette lid is closed, the reel brake is actuated back to brake the reel, and when the cassette lid is opened, the reel brake is interlocked with this. In the tape cassette, the reel brake has an elongated hole extending in the sliding direction thereof, and a support member provided on the upper shell is engaged with the elongated hole. The reel brake is slidably attached to the upper shell, and one of the reel brake and the upper shell is fixed in the sliding direction of the reel brake. A protrusion is provided on the other side, and a guide groove is provided that faces the protrusion and has approximately the same width as the protrusion, and while the protrusion and the guide groove are engaged, the reel brake is applied to the upper shell. A tape cassette, characterized in that the tape cassette is moved above the reel along the inner surface of the tape cassette.