JP2565198Y2 - Tape cassette - Google Patents

Description

[Detailed description of the invention] a. BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tape cassette, for example, a video tape cassette such as an 8 mm video.

B. 2. Description of the Related Art Conventionally, for example, a tape cassette shown in FIG.
Nos. 1, 63-12452, 63-17083, and 63-17090). This figure shows a lower half 1 of a cassette, in which a magnetic tape 4 is wound between a pair of tape reels 2 and 3, and is run on the front side of the cassette. On this front side, a front lid 16 (which is actually attached to an upper half side not shown) is arranged. On the rear side of the cassette, there is provided a reel lock member 5 for stopping the rotation of the tape reels 2 and 3 when not in use. The reel lock claws 6 and 7 are engaged with the teeth 8 and 9 on the outer periphery of the flange of the tape reel. It is configured to be locked together.

As shown in FIG. 7, the reel lock member 5 is provided so as to be slidable in the front-rear direction of the cassette. The reel lock claws 6 and 7 protrude from a front portion thereof, and a compression spring 10 is provided at a rear portion thereof. It is mounted between the half 1 and the rear wall. Therefore, the lock member 5 is always urged forward, and the lock claw 7 is engaged with the tooth portion 9 of the tape reel. From the insertion hole 12 of the half 1 to the inclined surface 13 of the lock member 5
Introduced while touching. As a result, the lock member 5 is forcibly moved rightward (rearward) in the drawing against the spring 10, and the lock claw 7 is separated from the tooth portion 9. In addition, in the figure
14 is an upper half, 17 is a rear label, and 22 is a rib.

In such a reel lock mechanism, the position of the reel lock member 5 in the left-right direction in FIG. 6 (that is, both sides) is regulated by a rib 18 provided on the lower half 1. The vertical direction of the reel lock member 5 is regulated by the ribs 15 on the upper half 14 and the lower half 1 which cover the reel lock member 5 housed in the lower half 1 as shown in FIG. However, due to the ribs 15 described above, recesses called sink marks are formed on the surface of the upper half 14 during molding, and the appearance of the cassette is deteriorated. When the rib 15 is provided on the transparent window of the upper half 14, the appearance of the cassette is not very good because the rib 15 can be seen from the outside. If the dimensions of the ribs 15 are not accurately determined, there is no margin or too much margin between the ribs 15 and the lock member 5 when the upper half 14 is covered as shown in FIG. In this case, it is not easy to incorporate the lock member 5 and the slidability is deteriorated.

C. SUMMARY OF THE INVENTION An object of the present invention is to provide a tape cassette which has a good appearance and can easily incorporate a reel lock member.

D. In other words, in order to lock the rotation of the tape reels 2 and 3 when not in use, the present invention locks the locking claws 6 and 7 with the teeth 8 and 9 formed on the peripheral edges of the flanges of the tape reels 2 and 3. In a tape cassette having a reel lock member 35 provided with
2 which protrudes from the bottom surface of the lower half 1 of the tape cassette
The reel lock member 3 loosely fitted between the guide portions 20 of the book
The height dimension of 5 is slightly smaller than the height dimension of the inner shape of the tape cassette, and the concave shape 40 is formed on the upper side opposite to the lower side where the operating member 10 for operating the reel lock member 35 acts. Further, a wall 22a having a pressing portion that penetrates the lock claws 6 and 7 at the tip of the reel lock member 35 and comes into contact with the lock claws 6 and 7 is provided. The present invention relates to a tape cassette characterized in that the opening angles of the lock claws 6, 7 can be adjusted.

E. Embodiment Hereinafter, an embodiment of the present invention will be described.

 1 to 4 show a first embodiment.

The video tape cassette according to the present embodiment has the same configuration as the cassette shown in FIG. 6 except for the reel lock mechanism.

That is, the reel lock mechanism according to the present embodiment is configured as shown in FIGS.
As shown in the figure, when the reel lock member 35 is slidably guided in the front-rear direction, a pair of slide position regulating guide portions 20 for regulating the positions in both sides (left and right) are integrally formed with the lower half 1. Along with the reel member
35 is formed high up to a position close to the original inner wall surface 44a of the upper half 44. Therefore, the reel lock member 35
The position of both sides is regulated by the guide portion 20, and the upper half 44 itself (specifically, the transparent window 45) can slide well in the front-rear direction of the cassette while being prevented from being pulled upward by the upper half 44 itself (specifically, the transparent window 45). The guide portion 20 is provided linearly in the front-rear direction,
The front end is the rib 22, and the rear end is the rear wall 46 of the lower half 1.
A recess 23 for accommodating an operating member (hereinafter referred to as a spring) 10 for urging the lock member is formed between the slide portion 35a of the reel lock member 35 and the rear wall 46. The slide portion 35a of the reel lock member 35 has an upper half 44 on both sides.
Has a pair of side walls 35b adjacent to each other, and a concave portion 40 is formed between these side walls (lightened). The tip of the tape reel storage chamber (rib) 22 is an inward wall portion 22a, and the opening angle changes with the movement of the reel lock member 35 while the lock claws 6 and 7 are regulated by contacting the wall portion 22a. (That is, open wide in the lock direction and narrow in the unlock direction).

If the reel lock mechanism is configured as described above, the lock member 35 has a pair of side walls 35b provided up to a position close to the inner wall surface of the upper half 44, the position of which is regulated from above by the upper half 44, and both sides have guide portions. Since the position is regulated at 20, it is possible to slide stably. In addition, since there is no need to provide ribs on the upper half side as in the conventional case, so-called sink marks do not occur on the surface of the upper half 14 and the upper half has a poor appearance due to the rib molding (particularly because of the transparent window 45). ), The appearance of the cassette can be improved and its commercial value can be increased.

Also, assembling the cassette, especially the reel lock member 35
When installing the reel lock member 35, the side wall 35b
The upper half 44 is brought close to the inner wall surface of the upper half 44, and a certain small gap 41 is present between the two. The upper half 44 can be covered so that the reel lock member 35 can slide satisfactorily when the upper half 44 is placed on the. As a result, assembly or design of the reel lock member 35 becomes easy. At the same time, the upper and lower halves can be formed with normal dimensions except for the guide section 20, so that the tape cassette can be easily formed.

 FIG. 5 shows another embodiment of the present invention.

In this example, the cross section of the reel lock member 35 is different from the above-described concave shape and is convex (a shape in which concave portions are formed on both sides), and the protruding wall 35b is provided at the center to a position close to the upper half inner wall surface 44a. Has formed. Therefore, similarly to the lock mechanism described above, the reel lock member 35 is stably held and can be easily incorporated, and the appearance of the cassette is good. Also,
Since the reel lock member 35 is a so-called three-point support at each of the guide member 20 and the projecting wall 35b, there is an advantage that the support is stabilized.

Although the present invention has been exemplified above, the above-described embodiment can be further modified based on the technical idea of the present invention.

For example, the above-described guide portion 20 and the sliding portion of the lock member
The shape, structure, and the like of the 35a may be variously changed, and the structure for fixing the guide portion 20 to the lower half may be a concave-convex fitting method or an adhesive. In this case, the respective guide portions 20 may be separately prepared, and these may be fitted into the concave ridges (not shown) provided on the lower half side by asperities, and may be fixed. It may be adhesively fixed to the lower half. Also,
The gap 41 between the reel lock member 35 and the upper half 44 can be of various sizes as long as the reel lock member 35 can be freely slid while being regulated by the upper half 44. In the region where the gap 41 exists, the upper half transparent window 45 exists in the above example, but the transparent window does not necessarily have to be provided. Instead of the spring 10 described above, another spring means such as a leaf spring or an elastic body may be used. The present invention can be applied to other types of tape cassettes.

F. As described above, in the present invention, the height of the reel lock member is configured to be slightly smaller than the height of the inner shape of the tape cassette, and the height of the reel lock member is opposite to the lower portion on which the operating member for operating the reel lock member operates. Since the concave portion is formed on the side, the position can be regulated without providing a rib on the upper half side as in the conventional case, so that no sink marks on the surface of the upper half occur, and the appearance of the upper half by rib molding Without badness, the appearance of the cassette can be improved to increase its commercial value.

In addition, since the concave portion is formed on the upper portion of the reel lock member, the center of gravity of the reel lock member is located at a lower position, and the operating point where the operating member for operating the reel lock member operates is located at a lower position. When the movement becomes smooth. Further, since the concave portion is formed, the weight becomes lighter, so that the frictional resistance generated between the lower end surface of the reel lock member and the bottom surface of the tape cassette is smaller, and the movement of the reel lock member becomes smooth.
Furthermore, even if the reel lock member expands due to any cause and the upper surface of the reel lock member comes into contact with the top surface of the tape cassette, the contact area between the two members is small because the concave portion is formed. The movement of the reel lock member becomes smooth.

Also, when assembling the cassette, particularly incorporating the lock member, the upper half is covered so that the lock member is close to the inner wall surface of the upper half, and thereby the upper half is always slid so that the lock member can slide satisfactorily. The locking member can be easily assembled or designed.

[Brief description of the drawings]

1 to 5 show an embodiment of the present invention. FIG. 1 is a sectional view of a main part of a tape cassette (II in FIG. 3).
2 is another sectional view of the essential part (sectional view taken along line II-II in FIG. 3), FIG. 3 is a plan view of the lower half of the essential part, and FIG. FIG. 5 is a sectional view similar to FIG. 1 of a tape cassette according to another example, with a half separated. FIG. 6 is a plan view of the lower half of the conventional tape cassette, and FIG. 7 is an enlarged sectional view of a main part of the cassette taken along line VII-VII of FIG. In the reference numerals shown in the drawings, 1... Lower half, 2, 3... Tape reel 4... Magnetic tape 5, 35... Reel lock member 6, 7... Lock claw 8, 9. … Spring 11… Release pin (operating member) 14, 44… Upper half 20… Guide 35a… Slide 35b… Side or wall 41… Gap 44a… Inner wall 45… Transparent window .

Claims (1)

(57) [Scope of request for utility model registration] To prevent the rotation of the tape reels (2) and (3) when not in use, locking tips (6) and (7) engaging with teeth (8) and (9) formed on the periphery of the flanges of the tape reels (2) and (3) are provided at the tip. A tape cassette having a reel lock member 35, wherein the tape cassette 2
The reel lock member 3 loosely fitted between the guide portions 20 of the book
The height dimension of 5 is slightly smaller than the height dimension of the inner shape of the tape cassette, and the concave shape 40 is formed on the upper side opposite to the lower side where the operating member 10 for operating the reel lock member 35 acts. A wall 22a having a pressing portion that penetrates the lock claws 6 and 7 at the tip of the reel lock member 35 and comes into contact with the lock claws 6 and 7 is provided. A tape cassette characterized in that the opening angle of the lock claws 6, 7 can be adjusted.