JPH0487085A - Cassette half - 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 Industrial Application The present invention relates to a cassette half for magnetic tape storage;
Especially regarding improvements to the reel lock.

Conventional technologyMagnetic tapes are widely used for both consumer and business purposes, but from the viewpoint of convenience in handling, the mainstream method for consumer use is to put them in half cassettes. However, due to advances in magnetic recording technology, it is becoming increasingly difficult to record and store larger amounts of information in smaller cassette halves. Downsizing is required not only for the cassette deck but also for the cassette deck itself, and it is desired to reduce the tape width in order to downsize the cassette deck. However, even if high-density magnetic recording is realized and the tape width is narrowed, it has not been possible to reduce the thickness of the cassette at the same rate as the tape width. For example, if the tape width was 12.7 fl, it could be easily inserted into a cassette half with a thickness of 22 wM, but if the tape width was 3 fl.
．． In the case of 81gg, a cassette half with a thickness of about 12mm is used.

That is, even though the tape width is 30% of the conventional thickness, the thickness of the cassette half is only 65% of the conventional thickness.

This means that even if the tape width is narrowed due to high-density recording, it will not be effective in reducing the size of the cassette half unless the structure of the cassette half is further improved.

Hereinafter, problems with the conventional cassette half will be explained based on the drawings.

FIG. 2 is a sectional view showing the structure of a conventional cassette half reel. In FIG. 2, reference numeral 1 designates a sumo wrestler cutout half exterior, 2 a reel holding recess, 3 a reel, 4 a magnetic tape, 5 a slide portion, 6 a reel lock, and 7 a reel lock holding spring.

When storing the cassette half, the reel 3 is fixed by a reel lock 6 to prevent the magnetic tape 4 from sagging. Reel 3 receives a lateral force from reel lock 6, but if reel 3 is tilted inside the cassette half 9
If it moves, the magnetic tape 4 will come into contact with the device outside the cassette half and damage the magnetic tape. Therefore, by providing the reel holding recess 2, the reel 3 is prevented from tilting or moving. Furthermore, the cassette half shown in FIG. 2 does not have a reel flange in order to make it thinner, but by eliminating the reel flange, it becomes easier for dust to enter the cassette half from the underside of the cassette half.

As a countermeasure against this, by providing a slide portion 5, when the cassette half is stored, the slide portion 5 is present in the position shown in FIG. 2, thereby preventing the duct from entering from the bottom surface of the cassette half.

The conventional cassette half has a reel lock 6, a reel holding recess 2. Due to the presence of the slide portion 6, the overall thickness of the cassette half is thicker than the thickness of the magnetic tape 4 and the device outside the cassette half.

Problems to be Solved by the Invention As described above, in conventional cassette sotonographs, the total thickness of the cassette half is determined not only by the thickness of the magnetic tape 4 and the device outside the cassette half, but also by the mechanism of the reel lock 6 and the thickness of the duct. The thickness of the dam member is necessary to prevent contamination, and even if the magnetic tape width is narrowed due to higher density, the cassette...
- There was a problem in that there was a limit to how thin the film could be.

Means for Solving the Problems In order to solve the above problems, the cassette half of the present invention is provided with a reel lock that moves in the same direction as the rotation axis of the reel, and furthermore, the reel lock surface is aligned with the rotation axis of the reel. It is formed at an angle to the

Operation With this configuration, the cassette nozzle of the present invention has a reel lock formed inside the reel. When attaching the cassette half to the cassette deck body, the reel shaft of the cassette deck body is inserted into the reel of the cassette leaf. This movement is in the same direction as the rotation of the reel, and this movement causes the reel lock to lock or release the reel. When the reel is still locked, the reel is pressed against the lower surface of the cassette half exterior, and by slanting the reel locking surface, the area of the reel locking surface is increased.

EMBODIMENT A cassette tonneau according to an embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a sectional view showing the structure of a reel portion of a cassette nozzle according to an embodiment of the present invention. In FIG. 1, 9 is a cassette half exterior, 1o is a reel, 11 is a magnetic tape,
12 is a reel lock, 13 is a rotation prevention protrusion, 14 is a presser spring, and 15 is a reel lock surface.

When storing a cassette half, the reel lock 12 is pressed downward by the presser spring 14, and the reel lock surface 1
5, the reel 10 is pressed against the lower surface of the cassette case 9. In this case, since the reel locking surface 16 must prevent rotation of the reel 1o, it is necessary to have projections and depressions that mesh like gears. Further, in order to prevent the reel lock 12 itself from rotating, a structure including a rotation prevention protrusion 13 is required. The reel lock functions with the above configuration.

When the cassette half is attached to the cassette deck and used, the reel rotation shaft of the cassette deck is inserted into the reel 1Q, so the reel lock 12 is pushed up and released by the insertion of the reel rotation shaft. .

Regarding the overall thickness of the cassette half, conventional cassettes...
Comparing the cassette half and the cassette of this embodiment, firstly, in the conventional cassette half, the reel lock moved in a direction perpendicular to the reel rotation axis, but in this embodiment, the reel lock moved in a direction perpendicular to the reel rotation axis. By moving in the same direction, the thickness of the reel lock member can be reduced.

Furthermore, in the conventional cassette half, in order to prevent the reel from tilting when the reel is locked, it was necessary to provide a reel holding recess for fixing the reel, but this is not necessary in this embodiment, so the force setting half can be Can be made thinner. Furthermore, in this embodiment, since the reel 1o and the cassette half exterior 9 are brought into close contact with each other by the presser spring 14,
Since there is little chance of dust entering between the reel 1o and the bottom surface of the cassette case 9, there is no need for sealing with the slide part 5 as in conventional cassette nozzles, and the thickness of the slide part 5 can be reduced. Also, the cassette half can be made thinner.

Regarding the reel locking surface 15 in this embodiment, as mentioned above, it is necessary to engage the reel 1o with irregularities such as gears to prevent rotation, but in addition, this reel locking surface 15 is connected to the rotation axis of the reel. By slanting it, you can get the following advantages:

If the reel locking surface 16 is engaged when the reel is locked, if the reel locking surface 15 is not slanted, the engagement will not be successful and may shift. This is because the position of the reel 1o needs to be accurately determined by the rotating shaft of the cassette deck, so it is not perfectly positioned with respect to the cassette half exterior 9, but can move slightly. Therefore, depending on the position of the reel 10, the engagement of the reel lock surface 15 when the reel is locked becomes unstable. However, by making the reel lock surface 15 oblique, the reel lock 12 moves in the same direction as the rotation axis of the reel, and the reel 1o receives force in a direction perpendicular to the rotation axis of the reel, making it stable. Moves to one point and becomes fixed.

Another advantage of making the reel lock surface 15 oblique is that the cassette 7 can be sealed even if the slide section 5 is not provided as an advantage of this embodiment. It is necessary to seal with the reel lock surface 15. However, the reel locking surface 15 cannot take a sufficient amount of nuvene inside the reel 10. Therefore, by making the reel locking surface 15 oblique, the area of the reel locking surface can be increased and the sealing at the reel locking surface 15 can be strengthened without increasing the size of the reel 1Q.

In addition to the increase in the area of the reel lock surface 15, the engagement is improved as described above, so the force for fixing the reel of the reel lock is increased without increasing the size of the series reel 1o with the reinforced presser spring 14.

This solves the drawback that in this embodiment, the reel lock position is close to the rotation axis of the reel, so the force of the reel lock to fix the reel is somewhat weak.

Effects of the Invention As is clear from the description of the embodiments above, the cassette half of the present invention maintains the reel locking function and hermetic sealing by being equipped with a reel lock that moves in the same direction as the rotation axis of the reel. However, a great effect can be obtained in that a thin cassette half can be provided.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing the structure of a reel portion of a cassette half according to an embodiment of the present invention, and FIG. 2 is a sectional view showing the structure of a reel portion of a conventional cassette half. 1o...Reel, 12...Reel lock, 16...Reel lock surface.

Claims (2)

[Claims] (1) A cassette half equipped with a reel lock that moves in the same direction as the rotation axis of the reel. (2) A cassette half that includes a reel lock that moves in the same direction as the rotation axis of the reel, and has a reel lock surface formed obliquely to the rotation axis of the reel.