JPH03250477A - tape cassette - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a tape cassette that stores a tape on which information such as music and video can be recorded/played.

2. Prior Art As a conventional tape cassette, for example,
There is a video tape cassette shown in Publication No. 0208 (Document 1).

Here, in order to simplify the explanation, an outline of FIG. 1 of Document 1 is shown in FIG. 6. In FIG. 6, in this tape cassette 31, a tape 32 is stored in a cassette shell 33, and a brake means 36 is biased by a biasing means 37 to an engaging portion 35 on the outer periphery of an IJ-ru hub 34 for winding the tape 32. The reel hub 34 is normally prevented from rotating, the release means 38 is operated from the outside of the tape cassette 31, and the release means 38 disengages the brake means 36, thereby making the reel hub 34 freely rotatable. There is.

Further, another tape cassette is shown in Japanese Utility Model Application Publication No. 1-85979 (Document 2).

Here, in order to simplify the explanation, an outline of FIG. 5 of Document 2 is shown in FIG. 7. In FIG. 7, this tape cassette 4
1, the tape 42 is stored in a cassette shell 43,
A brake means 46 is biased by a biasing means 47 to an engaging portion 45 on the outer periphery of the reel hub 44 that winds the tape 42, and normally prevents rotation of the reel hub 44 and opens the rotating lid 48 of the tape cassette 41. The rotary lid 48 is configured to allow the reel hub 44 to rotate freely by disengaging the brake means 46.

Problems to be Solved by the Invention In these conventional tape cassettes described above, a brake means is used to prevent damage to the tape due to loosening of the tape winding. Being inside the shell 33.43, there is a risk that the braking means 36.46 and the biasing means 37.47 may come into contact with the tape 32.42 and damage it due to unforeseen circumstances.

In addition, video tape cassettes and DAT cassettes are both attached to a magnetic recording/reproducing device and have a structure in which a shutter that blocks an opening window is rotated to pull out the tape. is shielded by a shutter and there is no risk of dust etc. entering, but
When a tape cassette is installed in a magnetic recording/reproducing device and recording/reproducing is performed, it is necessary to rotate a shutter to pull out the tape, and dust and the like adhere to the exposed recording/reproducing surface of the tape.

In addition, the tape cassette occupies a large volume during the process of rotating the shutter and when the shutter is in the open position, which poses problems such as hindering miniaturization of the device.

The present invention solves these conventional problems, prevents damage to the tape due to unforeseen circumstances and intrusion of dust, etc., and is suitable for digital recording/playback that requires high reliability. Our technical challenge is to provide a tape cassette that can contribute to the miniaturization of equipment.

Means for Solving the Problems In order to solve the above problems, the tape cassette of the first invention of the present application includes a cassette shell that stores a tape and has a pair of reel insertion holes, a magnetic head, and a pinch roller insertion window, and the cassette a shutter with a U-shaped cross section that is guided along a guide groove provided in the shell and is normally biased in the closing direction and slidably opens and closes the insertion window; a pair of reel hubs for winding up the reel, and a brake means provided in close proximity to an engaging part provided on one end surface of the pair of reel hubs so as to be able to approach and separate from the engaging part, the brake means is held between the cassette shell and the shutter, is interlocked with the opening/closing operation of the shutter, and normally engages with the engaging portion to prevent rotation of the pair of reel hubs, when the shutter is in the open position. The reel hub is configured to be disengaged from the engaging portion and to freely rotate the reel hub.

Further, the tape cassette of the second invention of the present application includes a cassette shell that houses a tape and has a pair of reel insertion holes, a magnetic head, and a pinch roller insertion window, and a tape cassette that is guided along a guide groove provided in the cassette shell. a shutter with a trowel-shaped cross section that is normally biased in a closing direction and slidably opens and closes the insertion window; a pair of reel hubs provided in the pair of reel insertion holes for winding the tape; and the shutter. and a brake means which is provided integrally with the pair of reel hubs and is always in pressure contact with an engaging portion provided on one end surface of the pair of reel hubs, the brake means is located between the cassette shell and the shutter, and the brake means is provided between the cassette shell and the shutter, and the brake means is provided between the cassette shell and the shutter. In conjunction with the opening/closing operation, the shutter normally engages with the engaging portion to prevent rotation of the pair of reel hubs, and when the shutter is in the open position, the shutter disengages from the engaging portion and rotates the reel hub. It is configured to be flexible.

Effects According to the structure of the tape cassette of the first and second inventions of the present application, this tape cassette has the brake means outside the cassette shell, so the tape cassette is structured to seal the stored tape, and the brake means Since the tape cassette shutter does not come into contact with this tape, and the shutter of the tape cassette does not rotate but slides to open and close, the volume of the tape cassette does not increase, and this operation also allows the braking means to operate. becomes.

EXAMPLE A first example of the tape cassette of the present invention will be described below with reference to the drawings.

1 is a plan view of the tape cassette according to the first embodiment of the present invention seen from the back side, FIG. 2 is a detailed perspective view of the tape cassette of FIG. 1 seen from above the back side, and FIG. FIG. 4 is a plan view of the tape cassette shown in FIG. 1 as seen from the back when the shutter is opened, and FIG.
This figure is a perspective view of the tape cassette shown in FIG. 4, viewed from above.

1, 2, 4 and 5, a tape cassette 1 stores a tape 2 and has a pair of reel insertion holes 3.
It has a magnetic head insertion window 4 and a pinch roller insertion window 5.
A cassette shell 6 having a trowel-shaped cross section, which is biased by a biasing means 7 in a direction in which the insertion windows 4 and 5 are slidably opened and closed in a direction connecting the centers of a pair of reel insertion holes 3 and normally closed. A guide 9 provided on the shutter 8 is slidable along a guide groove 10 provided on the cassette shell 6. Further, a pair of glue hubs 11 for winding up the tape 2 are provided in the pair of reel insertion holes 3, and a claw-shaped engagement portion 12 exposed from the cassette shell 6 is provided on one end surface of the reel hub 11. A brake means 13 is provided close to the outer periphery of the portion 12, and its distal end portion 13a is arranged to move along the recess 6a of the cassette shell 6 so as to be able to approach and separate from the engaging portion 12.

Here, as shown in FIG. 3, the engaging portion 12 of the reel hub 11 protrudes outside the cassette shell 6, and is covered by the shutter 8 so that it is not visible from the outside.

Further, the brake means 13 is held between the cassette shell 6 and the shutter 8, and in conjunction with the opening/closing operation of the shutter 8, the distal end portion 13a is normally engaged with the engaging portion 12 to prevent rotation of the pair of reel hubs 11. Also, shutter 8
When the shutter 8 is in the open position, the protrusion 13b of the brake means 13 engages with the elongated hole 14 provided in the shutter 8 so that the reel hub 11 is disengaged from the engaging portion 12 and can freely rotate. It is configured to move freely.

The operation of the tape cassette of this embodiment configured as described above will be explained.

In FIG. 1, in the tape cassette 1 of this embodiment, the shutter 8 is in the closed position, and the shutter 8 shields the magnetic head insertion window 4 and the pinch roller insertion window 5 by the biasing means 7, and at the same time urges the protrusion 13b of the brake means 13 to the left in the drawing, and presses the tip end 13a of the brake means 13 against the engaging portions 12 of the pair of reel hubs 11 to prevent rotation of the reel hubs 11.

In addition, in FIGS. 4 and 5, the tape cassette 1 of the present invention is shown with the shutter 8 in the open position, and the shutter 8 has the guide 9 sliding along the guide groove 10 against the biasing means 7. , the magnetic head insertion window 4 and the pinch roller insertion window 5 are opened to allow insertion of the magnetic head and the pinch roller, and at the same time, the first hole 14 urges the protrusion 13a of the brake means 13 in the right direction in the drawing, and the brake means 13 tip 1;
a is pulled away from the engaging portion 12 and the engagement is released, thereby making the reel hub 11 freely rotatable.

Naturally, by changing the length of the elongated hole 14, the amount of movement of the brake means 13 can be freely changed.

A second embodiment of the tape cassette of the present invention will be described below with reference to the drawings.

FIG. 8 is a plan view of a tape cassette according to a second embodiment of the present invention, seen from the back side, and FIG. 9 is a plan view of the lid of the tape cassette of FIG. 8, seen from the back side, when the shutter is opened.

In this embodiment, C is given the same reference numeral as in the first embodiment.

Further, FIGS. 3 and 5 of the first embodiment are used for clarity.

8 and 3, a tape cassette 1 according to a second embodiment of the present invention stores a tape 2, has a pair of reel insertion holes 3, a magnetic head insertion window 4, and a pinch roller insertion window 5. The cassette shell 6 and the insertion windows 4 and 5 are slidably opened and closed in the direction connecting the centers of the pair of reel insertion holes 3, and are normally biased in the closed direction by the biasing means 7. The shutter 8 has a guide 9 provided on the shutter 8 and a guide groove 10 provided on the cassette shell 6.
It is possible to slide along the Also, a pair of glue hubs 11 are provided for winding the tape 2 into the pair of reel insertion holes 3.
An engaging part 12 is provided on one end surface of the reel hub 11, and a brake means 13 is provided on the shutter 8 in close proximity to the outer periphery of this engaging part 12, and its tip 13a contacts the engaging part 12. It is arranged to move integrally with the shutter 8 so that it can be released.

Here, as shown in FIG. 5, the engaging portion 12 of the reel hub 11 protrudes from the cassette shell 6, but is covered by the shutter 8 so that it is not visible from the outside.

Further, the brake means 13 is provided between the cassette shell 6 and the shutter 8, and the distal end portion 13a is normally engaged with the engaging portion 12 so as to prevent the pair of reel hubs 11 from rotating. When the shutter 8 is in the open position, the reel hub 11 is disengaged from the engaging portion 12 and is configured to move together with the shutter 8 so that the reel hub 11 can freely rotate.

The operation of the tape cassette constructed as above will be explained.

In FIG. 8, in the tape cassette 1 of this embodiment, the shutter 8 is in the closed position, and the shutter 8 shields the magnetic head insertion window 4 and the pinch roller insertion window 5 by the urging means 7, and at the same time, the brake means 13 Pressing the tip end 13a of the reel hub 11 against the engaging portion 12 prevents the reel hub 11 from rotating.

9 and 5, the tape cassette 1 of the present invention is in a state where the shutter 8 is in the open position, and the shutter 8 is in a state where the guide 9 slides along the guide groove 10 against the biasing means 7. , the magnetic head insertion window 4 and the pinch roller insertion window 5 are opened to enable insertion, and at the same time, the brake means 13 is opened.
The distal end portion 13a of the reel hub 11 is separated from the engaging portion 12, and the reel hub 11 becomes freely rotatable.

As described above, according to the tape cassette according to the present invention,
Since the brake means is configured on the outside of the cassette shell, the tape stored therein is sealed and the brake means does not come into contact with this tape, and the brake means can be activated by opening and closing the shutter of the tape cassette. It becomes possible to operate it.

Further, in the first embodiment, the amount of movement of the brake means can be freely set and there is no wasted movement, but in the second example, although the amount of movement of the brake means is fixed, the shutter and brake There is no sliding movement between the device and the device, so there is no problem with wear or the like.

Effects of the Invention As described above, according to the tape cassette of the present invention, damage caused by tape winding loosening can be prevented by the brake means, and since the brake means is located outside the cassette shell, the brake means can be damaged in an unexpected situation. Do not touch the tape and damage it.

In addition, this tape cassette has a shutter that opens and closes the opening window into which the magnetic head and pinch roller are inserted, and which is normally biased in the closing direction.This tape cassette prevents the intrusion of dust, etc., and meets the requirements for high reliability. Suitable for digital recording/playback.

Moreover, since the shutter is configured to be slidably opened and closed in the tape running direction, the volume of the tape cassette does not increase due to the opening and closing operation of the shutter, contributing to miniaturization of the device.

[Brief explanation of drawings]

1 is a plan view of the tape cassette according to the first embodiment of the present invention, seen from the back side, FIG. 2 is a detailed perspective view of the tape cassette of FIG. 1, seen from above the back side, and FIG. 3 is the figure 1 FIG. 4 is a plan view of the tape cassette shown in FIG. 1 as seen from the back when the shutter is opened, and FIG.
The figure is a perspective view of the tape cassette shown in Fig. 4 seen from the front upper side, Fig. 6 is a partial sectional view for explaining the braking means of the conventional video Φ tape cassette, and Fig. 7 is a conventional DAT.
Perspective view for explaining the brake means of the cassette, No. 8
This figure is a plan view of the tape cassette according to the second embodiment of the present invention, seen from the back side, and FIG. 9 is a plan view of the tape cassette of FIG. 8, seen from the back side when the shutter is opened. 1...Tape cassette, 4...Head insertion window,
5... Pinch roller insertion window, 6... Cassette shell, 8... Shutter, 11... Reel hub,
12... Engaging portion, 13... Brake means.

Claims (2)

[Claims] (1) a cassette shell that stores a tape and has a pair of reel insertion holes, a magnetic head and a pinch roller insertion window; and a tape that is guided along a guide groove provided in the cassette shell;
a shutter with a U-shaped cross section that is normally biased in a closing direction and slidably opens and closes the insertion window; a pair of reel hubs provided in the pair of reel insertion holes for winding up the tape; A brake means is provided in close proximity to an engagement part provided on one end surface of the pair of reel hubs so as to be able to approach and separate from the engagement part, and the brake means is held between the cassette shell and the shutter. , in conjunction with the opening/closing operation of the shutter, is normally engaged with the engaging portion to prevent rotation of the pair of reel hubs, and is disengaged from the engaging portion when the shutter is in the open position. A tape cassette characterized in that the reel hub is rotatable. (2) a cassette shell containing a tape and having a pair of reel insertion holes, a magnetic head and a pinch roller insertion window; and a tape guided along a guide groove provided in the cassette shell;
a shutter with a U-shaped cross section that is normally biased in a closing direction and slidably opens and closes the insertion window; a pair of reel hubs provided in the pair of reel insertion holes for winding the tape; A brake means is provided integrally with the shutter and is always in pressure contact with an engaging portion provided on one end surface of the pair of reel hubs, the brake means is located between the cassette shell and the shutter, and the brake means is provided between the cassette shell and the shutter, and the brake means is provided between the cassette shell and the shutter, and The shutter normally engages with the engaging portion to prevent rotation of the pair of reel hubs, and when the shutter is in the open position, the shutter disengages from the engaging portion and causes the reel hub to rotate. A tape cassette characterized by being freely rotatable.