JPH11306723A - Magnetic tape cartridge - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a slide door of superior durability by providing a cartridge case with the slide door which opens, closes a tape draw opening and forming the slide door of a metal having an upper and a lower edge parts bent. SOLUTION: A tape draw opening 2 through which one end of a magnetic tape is to be drawn out is formed at one side wall of a cartridge case 1 astride an upper case 1a and a lower case 1b and adjacent to a corner part. A slide door 3 for opening, closing the opening 2 is set slidably. The slide door 3 is urged to a close position by a spring interposed between the cartridge case 1 and a rear end face of the slide door 3 inside the cartridge case 1 and retained at the close position when the cartridge is not used. At least one of an upper and a lower edge parts of the slide door is bent, and therefore a metallic curved face butts with the tape draw opening of the cartridge case when the slide door is opened, closed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic tape cartridge in which a single reel on which a magnetic tape is wound is rotatably accommodated in a cartridge case, and more particularly to a tape for pulling out one end of the magnetic tape. The present invention relates to a magnetic tape cartridge provided with a slide door for opening and closing a drawer opening.

[0002]

2. Description of the Related Art Conventionally, a magnetic tape cartridge used as a recording medium for an external storage device such as a computer includes a single reel on which a magnetic tape is wound, which has a flat shape having a substantially square planar shape. Some are rotatably accommodated in a cartridge case. This magnetic tape cartridge is used for storing data in a computer or the like.

A conventional magnetic tape cartridge of this type includes a magnetic tape cartridge in which a lid that can be opened and closed by rotation is attached to a tape drawing opening formed in one side wall of a cartridge case. This lid is attached in a manner to be locked in the closed position when the cartridge is not used. The leading end of the leader tape is locked by a hook incorporated in the tape withdrawal opening.

When a magnetic tape cartridge having such a configuration is set in a recording / reproducing device of a corresponding external storage device, the drive teeth of the device are driven by the engaging teeth of the reel exposed at the center of the lower case. When the means is engaged, the lid is opened by the tape withdrawing mechanism on the apparatus side, and the hook is pulled out together with the leader tape, whereby the leader tape is pulled into a predetermined position on the tape running path, and data is written on the magnetic tape. / Readout becomes possible.

[0005]

As described above, since the lid of the magnetic tape cartridge is of a rotary type, the means for opening the lid on the apparatus side is complicated, which is a constraint on the apparatus design. ing.

To solve this problem, it is conceivable to provide a sliding door which is biased to a closed position in place of the lid so that the door can be opened by loading the cartridge into the apparatus. However, a plastic door is somewhat thick. If not, there are difficulties in strength and durability.

In view of the above circumstances, an object of the present invention is to provide a magnetic tape cartridge provided with a slide door having excellent durability.

[0008]

According to the present invention, there is provided a magnetic tape cartridge in which a single reel on which a magnetic tape is wound is rotatably accommodated in a cartridge case. A sliding door for opening and closing a tape pull-out opening for pulling out the tape is provided, and the slide door is made of metal, and at least one of upper and lower edges is formed in a bent shape. .

In this case, it is preferable that the left and right edges of the slide door are further narrowed and the corners are slightly tapered.

[0010]

In the magnetic tape cartridge according to the present invention, since the member for opening and closing the tape pull-out opening is a slide door, the door opening means on the apparatus side can be easily designed, and the slide door is made of metal. Therefore, it is hard to break and has excellent durability.

Also, since at least one of the upper and lower edges of the slide door is formed in a bent shape, the metal curved surface comes into contact with the tape drawing-out opening of the cartridge case when the slide door is opened and closed. In addition, the cut surface of the metal does not cut the contact portion of the cartridge case.

Further, when the corner of the slide door is formed in a slightly tapered shape, the upper and lower edges of the right and left end faces abut against the tape pull-out opening when the slide door is opened and closed to cut off the portion. Absent.

[0013]

Embodiments of the present invention will be described below in detail with reference to the drawings.

1 and 2 are perspective views of a magnetic tape cartridge according to the present invention. FIG. 1 shows a closed state of the slide door, and FIG. 2 shows an open state of the slide door.

The magnetic tape cartridge includes an upper case 1a.
And a lower case 1b in the cartridge case 1,
A single reel on which a magnetic tape is wound is rotatably accommodated. On one side wall of the cartridge case 1, a tape pull-out opening 2 for pulling out one end of the magnetic tape straddles the upper case 1 a and the lower case 1 b,
In addition, a slide door 3 that is formed close to the corner and that opens and closes the tape drawing-out opening 2 is slidably provided. The slide door 3 is biased toward a closed position by a spring (not shown) interposed between the cartridge case 1 and the rear end surface 3b of the slide door 3 inside the cartridge case 1, and is closed when the cartridge is not used. It is held in position.

The inside of the tape pull-out opening 2 is shown in FIG.
As is apparent from FIG. 2, a leader pin 4 which clamps a leading end of a magnetic tape or a leading end of a leader tape connected to one end of the magnetic tape is accommodated, and the magnetic tape cartridge corresponds to an external storage device or the like. Is set in the recording / reproducing apparatus, the rotary drive means on the apparatus side engages with the engaging teeth of the reel (not shown) exposed at the opening in the center of the lower case 1b, and the tape pull-out mechanism on the apparatus side The front end face 3a of the slide door 3 is pushed, or the front end face 3a of the door comes into contact with a part of the inside of the apparatus and is pushed before the loading operation of the cartridge into the apparatus, and the slide door 3 is opened. When the leader pin 4 is pulled into the apparatus together with the magnetic tape or the magnetic tape and the leader tape, the magnetic tape is set on the apparatus side and the magnetic tape is set. Of data to the tape writing /
Reading becomes possible.

On one side of the cartridge case 1,
A rotary operation knob 5 for preventing erasure and double writing of the magnetic tape is exposed.

FIG. 3 shows a sliding door in one embodiment of the magnetic tape cartridge according to the present invention,
3A is a plan view, FIG. 3B is a top view, and FIG.
FIG. 3D is a longitudinal sectional view taken along the line AA in FIG.
Is a side view.

The sliding door 3 is obtained by bending the upper edge 3c and the lower edge 3d of the rectangular metal plate toward the other end as shown in FIG. 3C, and then as shown in FIG. The edge provided with the front end face 3a and the rear end face 3b is squeezed with a die or the like, and the corner is formed to have a slightly tapered shape.

According to the present embodiment, since the slide door 3 is made of metal, it is hardly damaged and has excellent durability.
Also, since the upper and lower edges 3c and 3d of the slide door 3 are bent and the corners are slightly tapered, when the slide door 3 is opened and closed, the upper and lower edges 3c and 3d formed of curved surfaces instead of cut metal surfaces are used as cartridges. The upper and lower edges 3c and 3d of the front and rear end faces 3a and 3d do not abut the tape withdrawal opening 2 because they come into contact with the tape withdrawal opening 2 of the case 1.
The cut surface of the metal does not scrape the tape drawing-out opening 2.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a magnetic tape cartridge according to the present invention with a sliding door closed.

FIG. 2 is a perspective view showing the magnetic tape cartridge of FIG. 1 with a sliding door opened.

FIG. 3 is a plan view, a top view, a longitudinal sectional view, and a side view of a slide door showing one embodiment of a magnetic tape cartridge according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Cartridge case 1a Upper case 1b Lower case 2 Tape pull-out opening 3 Slide door 3a Front end surface of slide door 3b Rear end surface of slide door 3c Upper edge of slide door 3d Lower edge of slide door 4 Leader pin

Claims (1)

[Claims] 1. A single reel wound with a magnetic tape,
In a magnetic tape cartridge rotatably housed in a cartridge case, a slide door for opening and closing a tape drawing opening for drawing one end of the magnetic tape is provided, and the slide door is made of metal and has upper and lower edges. Wherein at least one of the magnetic tape cartridges is formed in a bent shape.