JPH10106220A - Tape cassette reel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simplify the construction of a tape reel housed in a cassette case, improve the durability of the tape reel and, improve the assembly workability significantly. SOLUTION: The reel 2 is composed of a lower flange 21 which has a hub part 20 and an upper flange 22. A recess 24 with which a clamp 23 is mated is formed in a part of the tape winding part of the hub part 20. A driving shaft insertion recess 27 is provided inside the tape winding part 20 with scooped recesses 25 and ribs 26 therebetween. A pivot 30 is provided at the center of the hub part 20 and calking bosses 29 are provided at three or more positions around the pivot 30. The upper flange 22 is mated with the calking bosses 29 and fixed. Ribs are provided on the lower side surface of the upper flange 22 near the mating holes 31 into which the calking bosses 29 are inserted. With this constitution, by the reinforcing effect of the ribs, etc., the reel can withstand the falling impact and, further, as there is no orientation of the upper flange for the assembly, the assembly workability can be improved.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic recording / reproducing apparatus, for example, a tape cassette used in a recording / reproducing apparatus such as a video tape recorder (VTR).
The present invention relates to a reel for a tape cassette such as a mm video cassette or a digital video cassette.

[0002]

2. Description of the Related Art Conventionally, in a tape cassette in which a pair of tape reels in which a tape-shaped medium is wound inside a case are rotatably built, a hub portion and a lower flange are integrally formed on the tape reel, and an upper flange is formed on the hub portion. The upper flange is positioned at the base of the caulking boss provided at least at three places on the outer periphery of the pivot (Japanese Utility Model Publication No. 63-38467), or fitted to the caulking boss. In addition to the assembly (Japanese Utility Model Publication No. 51-23257), an assembly method for integrating without caulking (Japanese Utility Model Application Laid-Open No. 59-157283) is known.

[0003]

However, in this assembling method, there is a possibility that the engaging portion may be damaged due to insufficient strength against an impact due to a drop or the like. In addition, when positioning the boss for caulking, the upper flange portion is required. The area around the hole into which the caulking boss is inserted is thinner than other parts to accommodate the resin at the time of caulking. In other words, the positioning part of the upper flange has a hole, and the periphery of the hole is thin because the resin is contained during caulking and the thickness is thin, so the strength is weak, and cracks may occur depending on the degree of the force during welding. Sometimes it is a problem. Also, Japanese Utility Model Publication No. 59-23257 has a drawback in that the hole corresponding to the clamp is formed in the upper flange, so that the clamp portion and the hole of the upper flange must be aligned at the time of assembly. there were. The present invention is intended to eliminate these conventional disadvantages, and when crimping and integrating, the positioning of the upper flange can be extremely easily and surely performed, and the presence of the positioning ribs reinforces the flange, thereby reducing the impact on drop impact. It is an object of the present invention to provide a tape cassette reel which is durable and has extremely good assembling workability because there is no directionality of an upper flange at the time of assembly.

[0004]

According to the present invention, a tape reel comprising a lower flange having a hub portion and an upper flange is rotatably housed in a case comprising upper and lower cases, and the tape is transferred from one of the tape reels. It is stretched on the front of the case and wound on the other tape reel, there is a concave part where the clamp fits in a part of the tape winding part of the hub part, and inside the tape winding part there is A drive shaft insertion recess is provided via the rib and a pivot is provided at the center of the hub,
Further, in a tape cassette reel having a caulking boss provided at least at three places on the outer periphery thereof and having an upper flange fitted and fixed to the caulking boss, near a fitting hole into which the caulking boss is inserted on a lower surface side of the upper flange. Provided with ribs.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A tape reel used in this tape cassette is a reel for tape cassette in which a reel hub for winding a tape integrally formed with a lower flange and an upper flange are integrated by caulking. On the winding surface side (lower surface side), ribs are provided in the vicinity of fitting holes into which caulking bosses provided at least at three locations are provided on the outer periphery of the pivot, so that the ribs can reinforce the vicinity of the holes in the upper flange. Furthermore, the caulking bosses are arranged at equal intervals at an angle larger than the center angle formed by the concave part where the clamp fits, so that they can be assembled regardless of the insertion direction of the upper flange, so the assembly workability is greatly improved. It is a highly reliable product with high commercial value and high productivity.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to the example of a DVC (digital video cassette) shown in FIGS. 1 to 4. A pair of tape reels 2 and 2 around which a tape 1 is wound are rotated inside a case 3 composed of upper and lower cases. The tape 1 is stretched from one tape reel 2 through one opening 13 to the front of the case, and the tape 1 is again inserted into the case from the other opening 13. The front cover 4 covers the front surface of the tape 1 of the tape 1 stretched on the front surface of the case, the top cover 5 covers the top surface of the tape, and the rear cover 6 covers the back surface of the tape. A lid opening / closing mechanism that can selectively expose the tape 1;
A reel brake member 7 for suppressing the rotation of the tape reel 2 is provided on the tape reel 1 so as to be freely detachable, so that the tape is not loosened. As the tape reel 2 including the lower flange 21 and the upper flange 22 having the hub portion 20, a clamp 23 is provided on a part of the tape winding portion of the hub 20.
There is a concave portion 24 in which the drive shaft insertion concave portion 2 is inserted through the concave portion 25 and the rib 26 inside the tape winding portion.
7 and a pivot 30 in the center of the hub portion 20.
And at least three caulking bosses 2
9, a tape reel 2 for a tape cassette in which the upper flange 22 is fitted and fixed to the pivot 30 and the caulking boss 29, and the caulking boss 29 is inserted on the lower surface side of the upper flange 22. A rib 32 is provided in the vicinity of 31, for example, on the outer peripheral side, so that it can be easily assembled.

In this case, it is preferable to dispose the caulking bosses 29 at regular intervals at a position at an angle h larger than the center angle g of the concave portion into which the clamp is fitted. The rib 32
Is preferably provided including a position where it abuts and fits on the outer wall of the clamp fitting concave portion 24. In addition, in order to perform the positioning function, the rib 32 is higher than the height of the caulking boss 29.
It is also considered that the length is made longer to guide the flange during assembly.

A drive shaft insertion recess 27 of the apparatus is provided on the back side of the hub portion 20. However, simply integrating the hub portion 20 and the drive shaft insertion recess 27 increases the wall thickness and the surface accuracy of the hub portion 20 is increased. In order to make it worse, here, a recess 25 is provided from the upper surface to partially reinforce with a rib 26. A pivot 30 is provided on the upper surface of the hub portion 20 and is pressed downward by a reel spring 9 attached to the upper case 3. Since the caulking bosses 29 are provided at three places (120-degree intervals), the upper flange 22 has three fitting holes 31 into which the caulking bosses 29 are inserted, and the pivot 30 of the reel hub enters into the center. There is a central hole 33. A recess 34 is formed in the periphery of the fitting hole 31 so as to accommodate a melted portion when crimped. Further, a rib 32 is provided on the tape surface side on the outer peripheral side of the fitting hole 31. At the time of assembly, the rib 32 reinforces the recess 34 in which the fitting hole 31 and the center hole 33 are also opened.

The position of the caulking boss 29 is set to an angle h larger than the center angle g of the clamp recess 24 shown in FIG.
Since the upper flange can be inserted from any direction during assembly, the positioning of the upper flange 22 can be performed smoothly and reliably. That is, the caulking bosses 29 adjacent to the hub portion 20 are provided at equal intervals h at an angle h larger than each of the centers formed by the clamp concave portions 24, and the caulking boss insertion holes 31 are provided at corresponding positions on the upper flange 22. A rib 32 is provided in the outer peripheral portion of the fitting hole 31 so as to enter the concave portion 25 of the hub portion 20 so that the assembling can be easily performed wherever the boss and the hole match. Further, there is a concave portion for fusion on the upper surface of the reel flange, and the periphery of the fitting hole 31 has a thin shape as shown by a broken line in FIG.
Further, although the fitting hole 31 is provided, the strength is insufficient. However, by providing the rib 32, the strength of the product can be improved.

The reel brake member 7 is located on the rear side of the case, and is constantly urged toward the tape reel 2 by a spring 17. When the reel brake member 7 is mounted on the apparatus, the brake release member of the apparatus is released. Thus, the tape reel 2 is disengaged from the tape reel 2 so that the tape reel 2 can rotate. Reel brake member 7
The upper case 1 is provided with a guide rib (not shown) in order to make the movement smoothly.

In this embodiment, a spring 9 for pressing and supporting the reel hub 2 is provided in the upper case 3, and a lid lock 10 and a plug 1 fixed to the lower case 3 by a spring.
4, an MIC detection unit 15 and an optical cover 16 are provided. In the drawing, reference numeral 18 denotes a front lid spring, and 28 denotes a gate.

[0012]

According to the present invention, a tape reel consisting of a lower flange and an upper flange having a hub portion is rotatably housed in a case composed of upper and lower cases, and the tape is stretched from one tape reel to the front of the case. The tape is wound around the other tape reel. There is a concave part where the clamp fits in a part of the tape winding part of the hub part. In the tape cassette reel, a drive shaft insertion concave portion is provided, and a pivot is provided at the center of the hub portion, and a caulking boss is provided at at least three places on the outer periphery, and an upper flange is fitted and fixed to the caulking boss. By providing a rib on the lower surface side of the upper flange in the vicinity of the fitting hole into which the caulking boss is inserted, the rib has the effect of reinforcing and withstands a drop impact. It is arranged at equal intervals so as not to cover this concave at an angle larger than the central angle created by the concave part where the pump fits, and there is no direction of the upper flange at the time of assembling. It is easy, the handling operation can be performed safely, the configuration is simple, and the productivity can be greatly improved.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing an embodiment of the present invention.

2A and 2B show the tape reel of the example of FIG. 1, wherein FIG. 2A is an enlarged plan view of a lower flange, FIG. 2B is a longitudinal sectional view taken along line AA, and FIG. 2C is a plan view of an upper flange. .

3A is an enlarged longitudinal sectional view taken along line BB of FIG. 2, FIG. 3B is a bottom view, and FIG. 3C is a partially enlarged detailed sectional view.

FIG. 4 is an enlarged perspective view of the assembled state of the present invention.

FIG. 5 is an enlarged plan view of the assembled state of FIG. 4;

FIG. 6 is a longitudinal sectional view taken along line CC of FIG. 5;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Tape 2 Tape reel 3 Case 4 Front lid 5 Upper lid 6 Rear lid 7 Reel brake member 9 Spring 17 Spring 20 Hub part 21 Lower flange 22 Upper flange 23 Clamp 24 Recess 25 Recessed recess 26 Rib 27 Drive shaft insertion recess 29 For caulking Boss 30 Pivot 31 Fitting hole 32 Rib 33 Center hole

Claims (3)

[Claims] 1. A tape reel comprising a lower flange and an upper flange having a hub portion is rotatably housed in a pair of upper and lower cases inside a case. The tape is stretched from one tape reel to the front of the case and the other is wound. The tape is wound around a tape reel. There is a concave part where the clamp fits in a part of the tape winding part of the hub part, and the drive shaft is inserted inside the tape winding part through the rib stealing concave part and the rib. A tape cassette reel having a concave portion, a pivot at the center of the hub portion, and a caulking boss at at least three places on the outer periphery thereof, and an upper flange fitted and fixed to the caulking boss; A reel for a tape cassette, wherein a rib is provided near a fitting hole into which a caulking boss is inserted on a lower surface side. 2. The tape cassette reel according to claim 1, wherein the rib is provided so as to protrude from an outer peripheral side of the fitting hole and to enter into a stealing recess inside the hub portion. 3. The tape cassette reel according to claim 1, wherein the caulking bosses are arranged at equal intervals at a position larger than the center angle of the concave portion into which the clamp is fitted.