JPH1092145A - Tape cassette - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a highly reliable tape cassette which correctly operates without bending a tip portion of a spring member for urging a front cover provided in a cassette case. SOLUTION: A front cover 4 capable of being opened and closed, which is provided so as to cover a front face of, a tape, has on either side thereof a side plate 41 extending backwards, a supporting axis 42 provided to project from the outer side plate 41, and a coil spring 18 provided to be engaged with the supporting axis 42. One end 181 of the coil spring 18 is engaged with an engaging portion 43 provided on the side plate 41 of the front cover, while the other end 182 of the coil spring 18 is engaged with an upper casing 3. At a side end portion on a front face side of the upper casing 3, a cut portion 30 is provided with which the other end 182 of the spring member of the front cover 4 is to be engaged, so that the front cover 4 is moved to be closed. Thus, a tip of the spring member is prevented from cutting in a containing portion to the upper casing 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tape cassette used in a magnetic recording / reproducing apparatus, for example, a recording / reproducing apparatus such as a video tape recorder (VTR), in particular, a tape-shaped medium is accommodated in a case via a tape reel. The present invention relates to a tape cassette covered with a front lid when not in use, for example, a tape cassette such as an 8 mm video cassette or a digital video cassette.

[0002]

2. Description of the Related Art Conventionally, a tape cassette in which a pair of tape reels each having a tape-shaped medium wound inside a case is rotatably built therein is provided before opening and closing a case body and a front portion for drawing out a magnetic tape in the case body. A front cover having side plates pivotally attached to both side surfaces of the main body by support shafts, and is always urged in a closing direction by a spring, and the spring member is wound around a support shaft of the front cover. One end of the spring is locked to the locking portion of the front lid, and the other end is locked to the front end of the upper case or the locking portion of the side surface of the front lid. Was heavily used. (Japanese Utility Model Publication No. 63-49910, Japanese Unexamined Patent Publication No. 61-13 / 1986)
No. 486)

[0003]

However, in the conventional method for locking the spring member of the front lid, the front end of the foot on the side locking the spring member to the upper case must be bent to abut on the upper case. In some cases, the tip of the spring got into the part and normal operation could not be obtained. Also, when manufacturing a spring member on an automated line, bending the tip of the spring member can be burdensome in terms of man-hours and may cause a problem in speeding up the assembly line, resulting in poor assemblability. There's a problem. The present invention has been made to solve these conventional problems, and can be easily assembled with a simple configuration without bending the tip of a spring member, and can operate normally and has high reliability and commercial value. It is an object of the present invention to provide a high-cost tape cassette in an inexpensive form.

[0004]

According to the present invention, a pair of tape reels around which a tape is wound are rotatably housed in a case comprising upper and lower cases, and the tape is stretched from one tape reel to the front of the case. A front cover that can be freely opened and closed so as to cover the tape front surface of the tape stretched on the front surface of the case, the front cover being extended rearward on both sides; And a coil spring fitted on the shaft, one end of the coil spring is locked by a locking portion provided on the front lid side plate, and the other end is an upper case. And a notch for locking a spring member of the front lid at a side end on the front side of the upper case.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In this tape cassette, a portion of a front cover of an upper case where a spring member is engaged is cut out, and a wall is provided on a side surface of the tape case, so that the spring member is prevented from biting into the upper case. It also has the effect of preventing the spring member from rattling in the lateral direction. Also, when manufacturing the spring member on an assembly line, the spring member can be inserted into the upper case without bending the tip of the spring member. Therefore, the tape cassette can be manufactured at low cost and with high reliability, and is a reliable product with high commercial value.

[0006]

When the embodiment of EXAMPLES The invention is described in the example of DVC of FIGS. 3 (digital video cassette), the upper case 3 and lower case 3 ₁ a pair of tape reels 2 wound with tape 1 The tape 1 is rotatably housed inside a case made of
Is stretched from one tape reel 2 to the front of the case through one opening 13, reenters the case through the other opening 13 and wound on the other tape reel 2, and is stretched over the front of the case. Front cover 4 for covering the front surface of tape 1
And an upper lid 5 for covering the upper surface of the tape and a rear lid 6 for covering the back surface of the tape, and a lid opening / closing mechanism for selectively exposing the tape 1 is provided. Then, provided disengageably reel brake member 7 with a brake lock ₇₁ to prevent rotation of the tape reel 2 to the tape reel 1, are to prevent the tapes from slackening. The front cover 4, which can be opened and closed so as to cover the front surface of the tape 1, has a side plate 41 extending rearward on both sides, a support shaft 42 protruding from the outer plate 41, and a support shaft 4.
2 and one end 18 ₁ of the coil spring 18 is connected to the locking portion 4 provided on the front lid side plate 41.
Locked to 3, and the other end 18 ₂ is the upper front side at the side end portion of the front lid 4 spring of the case 3 so as to urge the front lid 4 in the closing direction is engaged with the upper case 3 a notch 30 for locking the other end 18 ₂ of the member is provided.

In this case, there are side plates 41 extending rearward on both ends of the front cover 4, and a support shaft 42 for rotatably attaching the front cover 4 to the case is projected from the side plate 41. 42 one end 18 ₁ to be constantly urged in the closing direction by a spring member 18 which is fitted in the coil portion is locked to the locking piece 43 provided on the front cover plate 41, the other end 18 ₂ is the upper case 3 And is locked by a notch 30 provided in the side wall 32 of the main body. Since the notch portion 30 and the other end 18 ₂ of the spring 18 enters the, to nor bites into the upper case 3 spring tip, also without rattle in the lateral direction, it is necessary to the bending at the tip of the spring 18 Disappears.

In this embodiment, a spring 9 for pressing and supporting the tape reel 2 is provided in the upper case 3 and the lower case 3
₁ is provided with a lid lock 10 fixed by a spring, a plug 14, an MIC detection unit 15, and an optical cover 16. 17 is a brake spring.

In the example shown in FIG. 4, a wall 31 is provided in the cutout 30 in parallel with the side wall 32 of the upper case 3 so that the coil spring 18
The other end 18 in _which the _second distal end bending assembly or without machining is to allow easy and used safely without rattle neither laterally the spring tip bite into the upper casing 3.

[0010]

According to the present invention, a pair of tape reels wound with a tape are 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, and the other tape is wound. It is wound on a reel, and a front cover is provided to be openable and closable so as to cover the tape front surface of the tape stretched on the front surface of the case, and the front cover is provided with a side plate extending rearward on both sides and a protruding portion on the side plate. It has a support shaft and a coil spring fitted on the support shaft, one end of the coil spring is locked by a locking portion provided on the front cover side plate, and the other end is locked by the upper case. In the tape cassette in which the front cover is urged in the closing direction, a notch for locking a spring member of the front cover is provided at a side end on the front side of the upper case, and the notch has a wall on the outside thereof. The upper case spring is provided by being provided at the side end on the front side of the upper case. The notch in the portion where the material is locked prevents the spring member from biting into the upper case, has the effect of preventing the spring member from rattling in the lateral direction, and has the effect of preventing the spring member from rattling in the assembly line. During the production of
Because the spring member can be used safely without bending the tip of the spring member, it is low-cost, reliable, and extremely easy to assemble. It can be greatly improved.

[Brief description of the drawings]

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

FIG. 2 shows an enlarged main part of the upper case in the example of FIG. 1;
FIG. 3 is a rear view of the upper case, FIG. 3B is a rear perspective view of the upper case, and FIG. 3C is a front perspective view of the upper case.

FIG. 3 is an enlarged vertical sectional view taken along line AA of FIG. 2;

4A and 4B show an enlarged main part of an upper case according to another embodiment of the present invention, wherein FIG. 4A is a rear view at the time of assembly, and FIG. 4B is a rear perspective view of the upper case.

[Explanation of symbols]

REFERENCE SIGNS LIST 1 tape 2 tape reel 3 upper case 3 ₁ lower case 4 front lid 5 upper lid 6 rear lid 7 reel brake member 9 spring 17 spring 18 coil spring 18 ₁ end 18 ₂ other end 30 cutout portion 31 wall 32 side wall 41 side plate 42 support shaft 43 Locking part

Claims (2)

[Claims] 1. A pair of tape reels wound with a tape are 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.
It is wound around the other tape reel, and a front cover is provided so as to be openable and closable so as to cover the tape front surface of the tape stretched on the front surface of the case, and the front cover has a side plate extending rearward on both sides and a side plate. A protruding support shaft, and a coil spring fitted on the support shaft, one end of the coil spring is locked by a locking portion provided on the front lid side plate, and the other end is connected to the upper case. A tape cassette in which a front cover is urged in a closing direction by being locked, wherein a notch portion for locking a spring member of the front cover is provided at a side end on a front side of the upper case. cassette. 2. The tape cassette according to claim 1, wherein the cutout portion is provided at a side end on the front side of the upper case with a wall provided on an outer side thereof.