JPS60202589A - Tape cassette - Google Patents

Abstract

PURPOSE:To stabilize the tape driving path and to give no damage to the tape by shifting a tape guide by the elastic power in the width direction of the tape like a tape reel. CONSTITUTION:A drive shaft 21 of a tape reel 19 of a magnetic recording/reproducing device is fitted to a recessed part of the reel 19 when a tape cassette is loaded to said recording/reproducing device and also pressed toward an upper half 14. The shaft 21 is, however, pushed back by the force of a reel holding spring 20 and balanced within the tape cassette. At the same time, a tape guide 12 is pressed to the half 14 by a rib 22 of the recording/reproducing device and then pushed back toward a lower half 17 by the force of a spring 16. In other words, both the reel 19 and the guide 12 are moved together. Therefore the route of a tape 32 is moved in parallel in the width direction of the tape 32 before and after the tape cassette is loaded to the recording/reproducing device.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a tape cassette used in a magnetic recording/reproducing device such as a video tape recorder.

Conventional Structures and Problems The quality of the tape cassettes used has improved in recent years due to the spread of video tape recorders, and the amount of tape cassettes used has also increased. Referring to the drawings below.

A conventional tape cassette as described above will be explained.

FIG. 1 shows an external view of a conventional tape cassette. In FIG. 1, a guard panel 1 protects a tape 2 stretched over the front surface of a tape cassette. 3
is the upper half and contains tape 2. FIG. 2 is a sectional view of FIG. 1.

Reference numeral 4 denotes a lower half, which has two built-in tape reels 6 wound with tape 2 between it and the upper half 3.

Lips 6.7 of the upper half 3 and lower half 4 are provided at corresponding positions. A guide roller 8 is provided on the outer periphery of the lip 6.7 to allow the tape 2 to run smoothly. The lip 6.7 is fastened with a screw e. Reference numeral 10 denotes a reel holding screw which presses the reel 6 toward the lower hole 1-74 by elastic force.

FIG. 3 shows a state in which the tape cassette having the above structure is installed in a magnetic recording/reproducing apparatus. Tape reel 6 is drive shaft 1
1 and move to the -73 side. However, it is pushed back by the 100 force of the reel presser spring and maintains balance. Therefore, the route by which the tape 2 reaches the tape guide 8 will change.

However, in a tape cassette with a conventional configuration, although there is some clearance in the axial direction of the tape guide 8, it does not move in conjunction with the movement of the tape reel 6, so the tape 2 runs diagonally between the tape reel 6 and the tape guide 8. This has the disadvantage that an unusual force is applied in the width direction of the tape 2, causing damage to the tape 2.

OBJECTS OF THE INVENTION In view of the above-mentioned drawbacks, it is an object of the present invention to provide a tape cassette that does not cause loss St to the tape.

In order to achieve the above objects, the tape cassette of the present invention includes a hollow tape guide having flanges at both ends and having one end open and the other end closed, and a cylindrical guide inserted into the open end of the tape guide. a lower half having a circular hole at a position corresponding to the cylindrical guide; an elastic body that is located between the tape guide and the upper half and urges the tape guide toward the lower half; and a tape is wound around the elastic body. and an elastic body that biases the tape reels toward the lower half side, or the tape guide is further inserted into the circular hole in the lower part of the flange portion located on the lower case side of the tape guide. This structure allows the tape reel and tape guide to move simultaneously when the tape cassette is installed in a magnetic recording/reproducing device, preventing the tape from running diagonally and damaging the tape. Things will go away.

DESCRIPTION OF EMBODIMENTS A first embodiment of the present invention will be described below with reference to one drawing. Since the appearance of the tape cassette is the same as that of the conventional example, only the tape guide portion will be illustrated and explained. The fourth figure is an exploded perspective view of the tape guide portion of the tape cassette. In Fig. 4, reference numeral 12 denotes a tape guide, which has the same cylindrical shape, one end is closed, the other end is open, and boxwood 1 is attached to both ends.
It has 3. The open end of the tape guide 12 is inserted into the cylindrical lip 16 of the upper half 14 with the spring 16 sandwiched therebetween. The lower half 17 has a circular hole 18 at a position corresponding to the lip 16 of the upper half 14. The fifth cross-sectional view shows the tape guide 12 inserted into the lip 16 of the upper half 14.
As shown in the figure. A tape 32 is wound around the reel 19. 20 is a reel pressing spring that presses the reel 19 toward the lower half side. FIG. 6 shows the state in which the tape cassette is installed in the magnetic recording/reproducing device. Reference numeral 21 denotes a drive shaft for the tape reel of the magnetic recording and reproducing device, and when the tape cassette is installed in the magnetic recording and reproducing device, the tape reel 1
Although it fits into the recess 9 and is pressed against the upper half side, it is pushed back by the elastic force of the reel presser spring 2o and is kept balanced within the tape cassette. At the same time, the tape guide 12 is pressed against the upper half 14 by the lip 22 of the magnetic recording/reproducing device, but is pushed back toward the lower half 17 by the elastic force of the spring 16. That is, the tape reel 19 and tape guide 12 move simultaneously. Therefore, the path of the tape 32 moves in parallel in the width direction of the tape 32 before and after being loaded into the magnetic recording/reproducing device.

As described above, the spring 16 is provided between the tape guide 12 and the upper half 14, and the tape guide 1 of the lower half 17 is
By providing the circular hole 18tl at position 2, the tape 18 moves smoothly in the width direction when the tape cassette is installed in a magnetic recording/reproducing device, so that the tape 32 is not damaged fs.

Next, a second embodiment of the present invention will be described with reference to the drawings. Since the external appearance of the tape cassette is the same as that of the conventional example, only the tape guide section will be described. FIG. 7 is an exploded perspective view of the tape guide portion. In Figure 7, 2
Reference numeral 3 designates a tape guide which has the same cylindrical shape, has one end closed and the other end open, has a collar 24 at both ends, and has a cylindrical portion 26 on the lower half 26 side. The cylindrical portion 25 is fitted. Furthermore, the open end of the tape guide 23 is inserted into the cylindrical lip 29 of the upper half 28 with the spring 30 sandwiched therebetween. A cross-sectional view of the tape guide 23 inserted into the lip 29 of the upper half 28 is shown in FIG. FIG. 9 shows the state in which the tape cassette is installed in the magnetic recording/reproducing device. It was in contact with the lower half 26 before being attached to the magnetic recording/reproducing apparatus, but after being attached, it is pressed against the upper half 28 side by the lip 31, but the spring 30 between the upper half 30 and the tape guide 23 causes the lower half 26 to be in contact with the lower half 26. Pushed back to the side. The movement of the tape guide 23 is linked to a tape reel (not shown), and the movement of the tape 32 in the width direction is only parallel movement, so the movement of the tape 32 is smooth.

Further, the movement of the tape guide 23 is guided by the inner periphery of the circular hole 27 of the lower half 26 due to the presence of the cylindrical portion 26, and slides smoothly and reliably.

As described above, the spring 3'Oft is provided between the tape guide 23 and the upper half 28, and the tape guide 23 of the lower half 26 is
By providing a circular hole 27 at the position and providing a cylindrical portion 26 in the tape guide 23 so as to fit into the circular hole 27, the tape 32 moves smoothly in the width direction, thereby preventing the tape 32 from being damaged. There is no. Furthermore, by providing the tape guide 23 with the cylindrical portion 26, the tape guide 23 can move more smoothly and reliably in the axial direction.

Effects of the Invention As described above, the present invention makes the tape guide movable in the width direction of the tape in the same way as the tape reel by means of elastic force, thereby stabilizing the running path of the tape and preventing damage to the tape. , its practical effects are great.

[Brief explanation of drawings]

4 is an exploded perspective view of the tape guide section of the tape cassette of the present invention; FIG. 6 is a sectional view of the tape cassette of the present invention; FIG. The figure is a sectional view of the tape cassette of the present invention installed in a magnetic recording device, and FIG.
FIG. 8 is a sectional view of FIG. 7, and FIG. 9 is a sectional view of the tape guide section when installed in a magnetic recording device. 1...guard panel, 2...tape,
3...Top half, 4...Bottom half, 5
...Tape reel, 6.7...Reply,
8...Tape guide, 9...Screw, 1
o... Reel presser spring, 11... Drive shaft. 12... Tape guide, 13... Brim, 14... Upper half, 15... Reply.
16. River... spring, 17... lower half, 18.
...Circular hole %19, mountain...tape reel, 20...
... Reel presser spring, 21 ... Drive shaft. 22...Rep, 23...Tape guide, 24...Brim, 25...Cylindrical part, 2
6... River lower half, 27... Circular hole, 28...
...Upper half, 2e...Rep, 30...
・・・Spring, 31...Reply, 32...
tape. Name of agent: Patent attorney Toshio Nakao and 1 other person'4
2 Figure 4 Figure 5 Figure 6? l Figure 7

Claims (2)

[Claims] (1) A tape guide having flanges at both ends and being hollow with one end open and the other end closed; a lower half having a circular hole at a position corresponding to the guide;
an elastic body that is located between the tape guide and the upper half and biases the tape guide toward the lower half; two tape reels wound with tape;
A tape cassette consisting of an elastic body that biases toward the front side. (2) A tape cassette according to claim 1, characterized in that a cylindrical part passing through the circular hole is provided at the lower part of the brim located on the lower case side of the -41#m tape guide. .