JPH10334635A - Magnetic tape cassette - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable first alignment of parts other than the cover accommodated in a lower cassette half to simplify the assembling and improve productivity by providing a thinner portion having flexibility in parallel to the tape extending direction to at least a part of an upper cassette half and causing the cassette half to rotate for opening or closing using the thinner portion as a hinge. SOLUTION: An upper cassette half 32 is divided to two sections by means of a thinner portion 47 and the left side of the upper cassette half 32 is opened and closed upward with the thinner portion 47 used as a hinge. At the time of assembling, a part other than the cover consisting of rids 9 to 11 is accommodated in the lower cassette half 33, the upper cassette half 32 is assembled to the lower cassette half 33 while the left side is opened and moreover the cover is assembled to the upper cassette half 32. Thereby, the cover can be assembled after the alignment of the parts other than the cover accommodated in the lower cassette half 33 and the assembly can be done easily and productivity can also 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 tape cassette having upper and lower cassette halves and an opening / closing lid.

[0002]

2. Description of the Related Art Along with recent technical innovations such as a high density magnetic recording medium, a magnetic tape cartridge, a video tape recorder (hereinafter, referred to as a VTR) and the like have become compact. As a result, VTRs are very often used outdoors, such as when shooting landscapes or people.

For this reason, in consideration of use outdoors, etc., a magnetic tape cartridge has been put into practical use as a two- or three-sheet lid that covers the entire surface and the back surface of the magnetic tape, respectively, as a measure against dust.

FIGS. 8 to 10 show a conventional example of a magnetic tape cassette in which an opening / closing lid for covering an opening on the front surface of the cassette body is composed of three lids. The magnetic tape cassette 1 is provided with a cassette body 4 having an opening 2 for inserting a tape pull-out member on the apparatus side such as a VTR on the front surface, and is stretched over the opening 2 by a tape guide provided on the front surface of the cassette body 4. And a cover 7 attached to the front side of the cassette body 4 so as to cover the magnetic tape 5 stretched in the opening 2 for carrying and the like. .

The cassette body 4 includes an upper cassette half 4a.
And the lower cassette half 4b. The opening / closing lid 7 includes three lids, an outer lid (front lid) 9, a top lid (upper lid) 10, and an inner lid (rear lid) 11.

The outer lid 9 includes a front cover plate 9a for covering the front side of the magnetic tape 5 stretched over the opening 2, and a front cover plate 9a.
a and side plate portions 9b projecting from both sides. A support pin 9c protrudes from an inner wall surface of the side plate portion 9b, and the support pin 9c is rotatably fitted and supported in pin support holes on both side surfaces near the front surface of the upper cassette half 4a. . Therefore, the outer lid 9 is rotatable about the support pin 9c.

The top lid 10 includes an upper lid plate 10a for covering the magnetic tape 5 stretched over the opening 2 and an upper lid plate 1
An upper cassette protruding from a front cover connecting portion 10b rotatably connecting both ends of the front edge side of the front cover 0a to an upper end edge of the front cover plate 9a and an arm portion 10c extending from the rear end edge of the upper cover plate 10a. An upper lid slide pin 10d slidably engaged with an upper lid guide groove 13 formed on both side surfaces of the half 4a.

When the outer lid 9 is opened, the upper lid slide pin 10d moves along the upper lid guide groove 13 with the turning movement of the front lid connecting portion 10b around the support pin 9c. As shown in FIG. 10, it moves to the rear end side of the cassette body 4 substantially in parallel with the upper surface of the cassette body 4. The inner lid 11 includes an inner lid plate 11 a that covers the rear surface of the magnetic tape 5 stretched over the opening, and an inner lid plate 11 a.
The upper lid connecting portion 11b rotatably connects the upper edge of the inner lid 11a to the upper lid plate 10a, and the inner lid guide groove 15 formed on the inner side surface of the cassette body 4 to protrude from the lower edge side of the inner lid 11a. And an inner lid slide pin 11c to be engaged.

[0009] The inner lid 11 is
When the lid is opened, the top lid 10 is moved to move the top lid 10.
1b follows, and the inner lid slide pin 11c moves on the inner lid guide groove 15 with the movement of the upper lid connecting portion 11b.
That is, as shown in FIG.
Follows the opening operation of the top lid 10 and retreats above the opening 2.

The magnetic tape cassette 1 as described above has a VT
When loaded into the R device, the side plate 9b of the outer lid 9 is pushed upward by a lid opening pin (not shown) provided on the device side, and in conjunction with the opening operation of the outer lid 9 at that time, The top lid 10 and the inner lid 11 open the lid. In order to take out the magnetic tape cassette 1 from the VTR device, each lid operates to close the lid, contrary to the loading operation.

[0011]

When assembling the magnetic tape cassette 1 having such a three-lid type opening / closing lid 7, the outer lid 9, the top lid 10
Then, the inner lid 11 is temporarily assembled first. Thereafter, the upper cover guide groove 1 provided in the upper cassette half 4a is provided.
The three lids 9, 10, and 11 are assembled to the upper cassette half 4a while fitting the top lid slide pin 10d into the top lid 10, and then the upper cassette half 4a and the lower cassette half 4b are assembled. Is going.

However, in such an assembling procedure, the assembling of the lower cassette half 4b for accommodating a large number of components and the upper cassette half 4a is the last, and the inner lid 11 is inserted into the inner lid guide groove 15 of the lower cassette half 4b. At the same time as the operation of inserting the lid slide pin 11c, the positioning and the like of a large number of components housed in the lower cassette half 4b must also be performed, so that there is a problem that assembling is troublesome and it is difficult to improve productivity. .

An object of the present invention is to solve the above-mentioned problems, and an object of the present invention is to provide a magnetic tape cassette which can be easily assembled and can improve productivity.

[0014]

SUMMARY OF THE INVENTION It is an object of the present invention to open and close a pair of reels rotatably mounted by winding a magnetic tape housed in upper and lower cassette halves, and an opening at the front of the cassette body. In a magnetic tape cassette provided with an opening / closing lid attached to freely cover, at least one portion of the upper cassette half has a thin portion provided with flexibility and provided in parallel with a tape stretching direction. The magnetic tape cassette is characterized in that the upper cassette half is pivotally opened and closed with the thin portion as a hinge.

[0015]

According to the present invention, the upper cassette half is provided with a flexible thin portion, and the thin portion exhibits a hinge function. Therefore, positioning of components other than the open / close lid stored in the lower cassette half can be performed first, and the open / close lid can be assembled later.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below in detail with reference to the accompanying drawings. FIG. 1 is an exploded perspective view of a magnetic tape cassette 30 according to one embodiment of the present invention. The magnetic tape cassette 30 has an opening 31 for inserting a tape pull-out member on the device side such as a VTR on the front surface, and is provided on the front surface of the cassette body composed of the upper cassette half 32 and the lower cassette half 33, and the front surface of the cassette body. The cassette tape has a configuration including a magnetic tape (not shown) stretched over the opening 31 by the tape guide, and an opening / closing lid 34 attached to the front side of the cassette main body so as to cover the magnetic tape. The opening / closing lid 34 is an outer lid (front lid)
9, a top lid (upper lid) 10 and an inner lid (rear lid) 11. Note that the configuration of the opening / closing lid 34 is the same as that of the related art, and a description thereof is omitted.

In the lower cassette half 33, a pair of reels 3
5 and 36 are rotatably arranged.
6, a magnetic tape (not shown) is wound. The magnetic tape is a tape guide 3 in front of the cassette and on both the left and right sides.
7 and 38, and passes through the opening 31 on the front side of the lower cassette half 33. And
On the peripheral edges of the reels 35 and 36, the engaging teeth 3
9, 40 are formed.

The magnetic tape cassette 30 is formed at the rear side of the cassette and between the reels 35 and 36 in order to prevent the magnetic tape from being loosened when not loaded in the VTR device, that is, when the cassette is stored or carried. A slide member 41 forming a lock device for locking the rotation of the reels 35 and 36 in the substantially triangular space thus formed;
Reel brakes 42 and 43, which are engaging claws, and a brake spring 44 for biasing the reel brake are arranged.

The upper cassette half 32 is provided with an upper lid guide groove 45, a pin support hole 46, and a thin portion 47.
The upper lid slide pin 10d slides in the upper lid guide groove 45. The support pin 9c of the outer lid 9 is rotatably fitted and supported in the pin support hole 46.
The thin portion 47 has flexibility, and is provided between the upper lid guide groove 45 and the slide member 41 arranged in the lower cassette half 33 in parallel with the stretching direction of the tape. The upper surface of the upper cassette half 32 is divided into two parts by a thin part 47, and the thin part 47 exerts a hinge function, so that the left part of the upper cassette half 32 can open and close upward and can be opened and closed. The reason why the thin portion 47 is provided between the upper lid guide groove 45 and the slide member 41 is that the upper lid slide pin 10d of the top lid 10 must be fitted into the upper lid guide groove 45, and This is because the positioning must be performed by contact with the upper cassette half 32.

Next, a method of assembling the magnetic tape cassette 30 of the present invention will be described with reference to FIGS. First, FIG.
As shown in (2), the lower cassette half 33 is placed on a plane, and components other than the opening / closing lid 34 are stored in the lower cassette half 33. Next, the upper cassette half 32 is bent from the normal state as shown in FIG. 1 by rotating the left side portion clockwise through the thin portion 47 (FIG. 3). Then, the upper half 32 and the lower half 3 are kept in a state where the upper half 32 is bent.
3 (FIG. 4). At this time, the positioning of the upper half 32 and each component in the lower half 33 can be performed accurately. Next, as shown in FIG. 5, in a state where the outer lid 9, the top lid 10, and the inner lid 11 are temporarily assembled in advance, the upper lid guide groove 45 provided in the upper cassette half 32 is inserted into the upper lid guide groove 45. While inserting the slide pin 10d, three lids 9, 1
0 and 11 are assembled into the upper cassette half 32 (FIG. 6). After performing predetermined operations such as opening the outer lid 9 and returning the upper cassette half 32 to the flat state, the upper cassette half 32 and the lower cassette half 3
3 is finally assembled (FIG. 7). Therefore,
Positioning of components other than the open / close lid 34 stored in the lower half 33 can be performed first, and the open / close lid 34 can be assembled later.

In this embodiment, the magnetic tape cassette provided with the opening / closing lid composed of three lids has been described. However, the opening / closing lid is not limited to three lids and may be, for example, two lids. In addition, at least one thin portion may be provided, and a plurality of thin portions may be provided. When a plurality of thin portions are provided, the upper cassette half is divided into three or more portions.

[0022]

As described above, according to the present invention, at least one portion of the upper cassette half has a thin portion which is flexible and is provided in parallel with the tape stretching direction, and the thin portion is hinged. Since the upper cassette half pivots openably and closably, components other than the open / close lid housed in the lower cassette half can be positioned first, and the open / close lid 34 can be assembled later. Therefore, assembly is easy,
Productivity can be improved.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a magnetic tape cassette according to the present invention.

FIG. 2 shows a method of assembling a magnetic tape cassette according to the present invention.

FIG. 3 shows a method of assembling a magnetic tape cassette according to the present invention.

FIG. 4 shows a method of assembling a magnetic tape cassette according to the present invention.

FIG. 5 shows a method of assembling a magnetic tape cassette according to the present invention.

FIG. 6 shows a method of assembling a magnetic tape cassette according to the present invention.

FIG. 7 shows a method of assembling a magnetic tape cassette according to the present invention.

FIG. 8 is a perspective view of a conventional three-lid type magnetic tape cassette in an assembled state.

9 is a cross-sectional view of a main part showing a state where a lid of the magnetic tape cassette shown in FIG. 8 is closed.

FIG. 10 is a sectional view of a main part showing a state where a lid of the magnetic tape cassette shown in FIG. 8 is opened.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Magnetic tape cassette 2 Opening part 4 Cassette main body 4a Upper cassette half 4b Lower cassette half 5 Magnetic tape 7 Opening / closing lid 9 Outer lid 9a Front lid plate 9b Side plate part 9c Support pin 10 Top lid 10a Upper lid plate 10b Front lid connection part 10c Arm part 10d Upper lid slide pin 11 Inner lid 11a Inner lid plate 11b Connecting part 11c Inner lid slide pin 13 Upper lid guide groove 15 Inner lid guide groove 30 Magnetic tape cassette 31 Opening part 32 Upper cassette half 33 Lower cassette half 34 Opening / closing lid 35 , 36 Reel 37, 38 Tape guide 39, 40 Engagement tooth 41 Slide member 42, 43 Reel brake 44 Spring 45 Upper lid guide groove 46 Pin support hole 47 Thin part

Claims (1)

[Claims] 1. A pair of reels rotatably mounted by winding a magnetic tape housed in upper and lower cassette halves, and an opening / closing lid attached to cover an opening on the front surface of the cassette body so as to be openable / closable. In the magnetic tape cassette provided, at least one portion of the upper cassette half has a thin portion which is flexible and is provided in parallel with the tape stretching direction, and the upper cassette half is hinged with the thin portion. A magnetic tape cassette characterized in that it can be opened and closed.