KR950003063Y1 - Upper case for video tape cassette - Google Patents

Abstract

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Description

Top Case of Video Tape Cassette (HALF UP)

1 is an exploded perspective view of a video tape cassette.

2 is a cross-sectional view of the upper case of a conventional video tape cassette.

Figure 3 is an enlarged exploded perspective view of the main portion in the upper case of the video tape cassette according to the present invention.

4 is a cross-sectional view of the coupling state of FIG.

* Explanation of symbols for main parts of the drawings

10: video tape cassette 11: HALF DOWN

12: video tape 13: supply reel (SUPPLY REEL)

14: TAKE UP REEL 15: Upper Case (HALF UP)

16: Windows 17: support spring

18: fusion spring support 19: reel top plate (REEL UP)

20: mounting portion 21: spring lift bump

22: insertion groove 23: inclined surface

The present invention relates to a top case (HALF UP) of a video tape cassette (VIDEO TAPE CASSETTE).

In general, the video tape cassette 10 is mounted on the bottom case 11 and the bottom surface of the bottom case 11, as shown in FIG. 1, on which the video tape 12 is wound. From the upper part of the reel (SUPPLY REEL) 13 and the take-up reel (14) and the upper case of the lower case 11 is fastened to the upper case (15) consist of.

On the other hand, in the structure of the video tape cassette 10 as described above, the upper case 15 shows the state of the video tape 12 wound on both sides thereof with the supply reel 13 wound around the reel 14. WINDOW 16 is mounted so that it can be checked from the outside, and when the video tape cassette 10 is loaded on the reel of the VCR (VIDEO CASSETTE RECORDER) (not shown), The support spring 17 for suppressing the lifting of the 13 and the winding reel 14 by its own rotational force is made of a fused and stacked structure.

However, in the structure of the upper case 15 of the video tape cassette 10 as described above, when the video tape 12 is wound on the supply reel 13 or the reel 14 at high speed by using an automatic winding machine, the supply is performed. As the speed of rotation of the reel 13 or the winding reel 14 increases, the ascension increases, and as shown in FIG. 2, the support spring 17 fused and coalesced on the bottom of the upper case 15 is raised. And the reel top plate 19 is welded to the reel top plate 19 while the support spring fusion unit 18 and the reel top plate 19 protruding from the bottom surface of the upper case 15 are in contact with each other. There was a drawback of being scratched by the part 18, and dust generated by this scratching scattered into the inside of the video tape cassette 10, resulting in surface damage of the video tape 12, resulting in a playback picture. Deteriorates the quality of Kkichige problems that affect the quality was raised.

The present invention is to solve such a conventional problem, and the support spring is fixed when the reel is raised due to the high-speed rotation by protruding the spring rise prevention part in the window mounted on the upper case of the video tape cassette and the inner mounting portion of the upper case. The new type of video tape cassette is designed to prevent excessive crimping above the height to prevent scratches on the reel top plate caused by the support spring fusion, and to maintain the tightness of the window and the upper case. The purpose is to provide an upper case.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

In the present invention, in the upper case 15 of the video tape cassette 10 in which the windows 16 are mounted on the upper left and right sides thereof, and the support springs 17 are fused in both directions from the center of the bottom face. The support spring 17 has a feature of protruding the spring raising prevention jaw 21 at a predetermined position of the upper case 15 and the mounting portion 20 of the window 16 formed on the bottom of the upper case 15 vertically upward at both ends. .

As shown in FIG. 3, the spring lift-up jaw 21 in the present invention has a support spring that is coalesced in the left and right direction about the support spring fusion unit 18 at the center of the bottom surface of the upper case 15. (17) While protruding in the center of the upper case 15 and the mounting portion 20 of the window 16 formed on the bottom surface of the upper case 15 of the vertical upper portion of both ends, at the protruding position of the spring rise prevention jaw 21 In the predetermined position of the edge of the corresponding window 16 is formed an insertion groove 22 into which the spring lifting prevention jaw 21 is integrally protruded from the upper case 15.

At this time, the inclined surface 23 of a predetermined angle toward the center is formed at the tip of the spring rising prevention jaw 21 protruding from the upper case 15 to increase the contact surface with the upper surface of both ends of the support spring 17. It is made of a structure.

Referring to the effect of the present invention as follows.

When the video tape 12 is wound on the supply reel 13 (or the winding reel 14) at high speed by an automatic machine or the like, the supply reel 13 is also rotated upward and is raised upward, wherein the support spring ( 17 is pressed by the supply reel 13 to be raised in the bottom direction of the upper case 15, but as shown in Figure 4 by pressing the spring lifting jaw 21 according to the present invention is pressed to a predetermined position or more When suppressed, the rotation of the supply reel 13 (or winding reel 14) is achieved in that state.

According to the present invention, in the case of winding the video tape on the reel at high speed, the reel itself increases as the reel rotates, and even though the compressive strength against the support spring becomes stronger, Since the rise of the support spring is suppressed, the reel top plate is prevented from being scratched by the support spring fusion portion and dust is not generated. Therefore, the quality degradation such as surface damage of the video tape can be prevented in advance. There is a remarkable effect, and the spring rise prevention protrusion projecting from the upper case is inserted into the insertion groove formed in the rim of the window to supply the window to the upper case in the automatic assembly process line, and then to the external impact when transferring. It is possible to prevent the window from being separated from the upper case by It works.

Claims (2)

Prize. In the video tape cassette 10 having lower cases 15 and 11 and having a window 16 and a support spring 17 formed on the upper case 15, both ends of the support spring 17 are connected to the window 16. The upper case of the video tape cassette, characterized in that the spring rise prevention jaw (21) protrudes in a position in contact with the mounting portion (20) of the. According to claim 1, wherein the spring rise prevention jaw 21 is formed at an end thereof with an inclined surface 23 having a constant inclination toward the center, and the spring rise prevention jaw ( 21. The upper case of the video tape cassette, characterized in that the insertion groove 22 is formed to be inserted.