JPH117749A - Single reel type magnetic tape cartridge - Google Patents

Abstract

PROBLEM TO BE SOLVED: To assure easy loading operation of leader block and prevent adhesion of dust to the leader block in a single reel type magnetic tape cartridge, in which the leader block for leading the tape is fixed at the tape end. SOLUTION: An internally recessed loading aperture 5 is provided facing to the circumference surface of a case body 1. A pair of protruded pieces 6 are provided to the internal opening edge of the loading aperture 5, and the leader block 4 is held by the single-ended holding method with both protruded pieces 6. The loading aperture 5 is covered with a cover 7 located at the external surface side of case than the leader block 4 in order to prevent adhesion of dust on the leader block 4 when it is not used. When the cover 7 is opened, the leader block 4 is exposed, thereby capturing the engaging portion 26 of the leader block 4 easily with the loading mechanism.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a single-reel type magnetic tape cartridge in which only one reel for winding a tape is accommodated in a case body.

[0002]

2. Description of the Related Art In a tape cartridge of this kind,
There is one in which a leader block made of a plastic molded product is connected to the paying-out end of the tape (Japanese Patent Laid-Open No. 62-6 / 1987).
6486). When not in use, the leader block is press-fitted into a shallow pocket facing the loading opening and held on standby. In such a tape cartridge,
Since most of the leader block projects into the loading pocket, the leader block can be reliably caught and pulled out of the case even if the standby posture varies slightly. On the other hand, since the loading opening is always open, dust and the like easily enter the case through the loading opening.

Therefore, as shown in FIG. 6, there is a magnetic tape cartridge in which the loading opening 40 is narrowed, a leader block 41 is press-fitted to the opening edge thereof, and the loading opening 40 can be closed by the leader block 41 (reference). unknown). In the figure, reference numeral 42 denotes a reel, 43 denotes a tape, and 44 denotes a clamp pin for connecting the tape 43 to the leader block 41.

[0004]

When the loading opening 40 is closed by the leader block 41 as described above, dust can be prevented from entering from the loading opening 40, but the leader block 41 itself is exposed on the outer surface of the case. Dust easily adheres to the surface. Dust adhered to the leader block 41 may be drawn into the tape drive during tape loading and adhere to the magnetic head, thereby increasing errors. Also, the leader block 41
Is merely engaged and held by a relatively weak force using the elasticity of the case body 45. Therefore, when the tape cartridge is handled, the leader block 41 may be erroneously pushed into the case. There is. In such a displaced state of the leader block 41, the loading by the loading mechanism may not be performed properly.

In a conventional tape cartridge having a leader block at the end of the tape, there is room for improvement in that the ease of loading the leader block and the dust resistance cannot be satisfied at the same time. SUMMARY OF THE INVENTION It is an object of the present invention to provide a single-reel type magnetic tape cartridge which can maintain the easiness of the loading operation of the leader block and at the same time minimize the attachment of dust to the leader block.

[0006]

According to the magnetic tape cartridge of the present invention, a single reel 2 on which a tape 3 is wound is disposed inside a box-shaped case main body 1, and a leader block 4 is provided at a feed-out end of the tape 3. Are connected. The leader block 4 is formed by integrally molding a base 25 connected to an end of the tape and a hook 26 captured by a loading mechanism of a tape drive. A loading opening 5 that allows the loading mechanism to enter is provided in a concave shape facing the peripheral side surface of the case body 1. At the inner opening edge of the loading opening 5, a protruding piece 6 for holding the base 25 therebetween and fixedly supporting the leader block 4 in a cantilever standby posture is provided. A lid 7 for closing the loading opening 5 is provided on the outer surface side of the case from the leader block 4, and the lid 7 is supported on the case body 1 so as to be openable and closable.

Specifically, at the front corner of the case body 1, a case bottom wall 20, a case front wall 21, and a case side wall 22 are provided.
And the loading opening 5 is formed. A pair of protruding pieces 6 that protrude and hold the leader block 4 are provided at the cutout edges of the case bottom wall 20. The lid 7 is formed in an L-shaped cross section by a lid side wall 7a and a lid front wall 7b, which cover the loading opening 5 continuously from the case side wall 22 and the case front wall 21. By pivotally supporting the rear end of the lid side wall 7a with the pin 32, the lid 7 is supported on the case body 1 so as to be swingably openable and closable. A lid lock 33 is provided between the lid 7 and the case body 1 to hold the lid 7 in the closed position.

[0008]

The leader block 4 is fixedly supported by the protruding piece 6 provided at the inner opening edge of the loading opening 5, and the loading opening 5 is covered with the lid 7 on the outer surface side. , And can prevent dust and the like from adhering to the leader block 4. The leader block 4 is not accidentally touched. The leader block 4 fixed and held in the standby position by the protruding piece 6 is supported in a cantilever manner, and its locking portion 26 protrudes into the loading opening 5. Is released, the hook 26 can be reliably and easily captured by the loading mechanism.

[0009]

1 to 5 show a single reel type magnetic tape cartridge according to an embodiment of the present invention. In FIG. 2, the magnetic tape cartridge has a rectangular box-shaped case body 1 formed by joining upper and lower cases 1a and 1b.
Accommodates one reel 2 inside the reel 2
Is wound with a tape 3. A leader block 4 for pulling out the tape 3 is fixed to the pay-out end of the tape 3. The leader block 4 is arranged so as to face a loading opening 5 opened at the front left corner of the case body 1, and the loading opening 5 can be opened and closed by a swingable lid 7.

As shown in FIG. 3, a boss 9 of the reel 2 is open upward, and a driving ring 10 for transmitting the rotational force of a driving unit of the tape drive to the reel 2, a reel presser 11, and a reel A spring 12 for pressing and holding down the presser 11 is housed. The drive ring 10 is received by a seat 13 provided on the inner bottom of the boss 9, and is vertically slidable with respect to the seat 13, but is supported such that relative rotation is impossible. An adsorption plate 14 made of an iron plate, which is magnetically attracted by the driving body, is fixed to the lower surface of the seat 13. The driving body is pressed against the bonding surface at the bottom end of the driving ring 10 in a surface bonding manner, and drives the driving ring 10 to rotate.

To prevent tape slack when not in use, FIG.
As shown in (1), a reel lock mechanism is arranged by utilizing a space at the front right corner of the case body 1. The reel lock mechanism includes a lock claw 1 that swings around a pin 15.
6, a torsion coil-shaped spring 17 for urging the lock claw 16 to swing toward the reel 2, and a gear tooth-shaped lock tooth 18 provided on the periphery of the lower flange of the reel 2. A release piece 19 protrudes from the lower surface of the locking claw 16 in the middle. As shown in FIG. 4, by operating a groove 19a provided in the release piece 19 with a release pin P inserted from the lower surface side of the lower case 1b, the entire lock claw 16 is counterclockwise against the urging force of the spring 17. The locked state can be released by swinging in the rotation direction.

In FIG. 1, a loading opening 5 is formed by diagonally notching a front left corner of a case bottom wall 20 of the case body 1, and furthermore, a case front wall 21 and a case side wall 2 between notch ends.
2 is cut out. The case upper wall 23 covers the upper surface side of the loading opening 5 without being cut.
A pair of front and rear projecting pieces 6 for holding the leader block 4 are provided on the upper surface of the middle part of the case bottom wall 20. Most of the protruding pieces 6 protrude from the case bottom wall 20 and can be elastically deformed toward or away from each other.

In FIG. 5, the leader block 4 is formed of a plastic molded product having a trapezoidal base 25 and a hook-shaped hook 26 formed integrally with each other and having flat upper and lower surfaces. Clamp pin 2 in C-shaped groove 27
8 and the tape 3 are pressed together to connect the tape 3. Groove 2
The concave surface 2 engaging with the tip of the front protruding piece 6
9 are provided. The rear projecting piece 6 receives the flat surface on the rear surface side of the base 25. That is, when not in use, the leader block 4 is sandwiched and held by a pair of front and rear projecting pieces 6, 6 and is fixedly supported in a cantilever standby posture in which the latching portion 26 projects substantially at the center of the loading opening 5. I have.

To protect the leader block 4 and the tape 3 facing the loading opening 5, a lid 7 for closing the loading opening 5 is provided on the outer surface side of the case from the leader block 4. In FIG. 5, the lid 7 has a lid side wall 7a bent in an L shape and a lid front wall 7b.
The cylindrical boss 31 provided at the rear end of the a is pivotally supported by the pin 32, so that the loading opening 5 is closed with respect to the case body 1 (the state shown in FIG. 2), and from this position in the clockwise direction. It can swing back and forth between a position (the state shown in FIG. 1) where the loading opening 5 is opened by swinging. The pins 32 are integrally erected from the lower case 1b, are inserted into the boss 31, and are received by the upper case 1a.

To keep the lid 7 locked in the closed position, a lid lock 33 is provided between the lid 7 and the case body 1. The lid lock 33 protrudes toward the lower end of the inner surface of the front end of the lid front wall 7b, and the claw portion 34 at the protruding end engages with a shallow engagement recess 35 provided on the inner surface of the case front wall 21. Lid 7
Can be kept closed. Opening and swinging the lid 7 against the elasticity of the lid lock 33 can release the engagement between the claw portion 34 and the engagement recess 35. If necessary, the engaging recess 35 may be formed in a hole passing through the front wall 21 of the case, and the engagement state of the claw portion 34 may be released by a release pin that enters the engaging recess 35 from the outer surface of the case. it can.

When the magnetic tape cartridge is not in use, the leader block 4 is held between the pair of projecting pieces 6 and is kept in a standby position as shown in FIG. Further, the loading opening 5 is closed by the lid 7 and only the lower surface side is opened. For this reason, dust is generated when the tape cartridge is handled or stored.
Can be prevented from adhering to the surface. Further, the holding posture by the protruding piece 6 does not change by accidentally touching the leader block 4. The lid 7 is moved by the loading operation to the tape drive.
When the opening operation is performed, the engaging portion 26 of the leader block 4 can be exposed substantially at the center of the loading opening 5, so that the engaging portion 26 can be reliably and easily captured by the loading mechanism.

In addition to the above embodiment, the loading opening 5
Can be formed so as to face either the case front wall 21 or the case side wall 22 of the case body 1. In this case, the lid 7 can be formed in a flat plate shape. Further, the lid 7 formed in a flat plate shape may be supported by the case body 1 so as to be slidably opened and closed. By using the case side wall 22 and the case front wall 21 as positioning walls, the leader block 4 can be sandwiched and held in a standby posture. In this case, only one protruding piece 6 needs to be provided.

[0018]

According to the present invention, the loading opening 5 is provided in the form of an inner recess facing the peripheral side surface of the case body 1, and the leader block 4 is held by the projection 6 provided on the inner opening edge. Further, the loading opening 5 is covered with a lid 7 located on the outer surface side of the case from the leader block 4 so as to prevent the leader block 4 from being exposed to the case surface when not in use. Adhesion of dust and the like can be eliminated. Therefore, it is possible to reduce the degree of error occurrence at the time of signal reading / writing caused by the dust adhering to the leader block 4 being transferred to the magnetic head. At the time of use, the loading opening 5 is opened by opening the lid 7 so that the hooking portion 26 of the leader block 4 can be sufficiently exposed to the outer surface of the case. It is possible to satisfy both dustproofness and ease of loading operation of the leader block 4 as a whole.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a peripheral structure of a loading opening.

FIG. 2 is a plan view of the entire interior.

FIG. 3 is a sectional view taken along line AA in FIG. 2;

FIG. 4 is a sectional view taken along line BB in FIG. 2;

FIG. 5 is an internal plan view showing a structure around a loading opening.

FIG. 6 is an internal plan view showing a standby state of a conventional leader block.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Case main body 2 Reel 3 Tape 4 Leader block 5 Loading opening 6 Projection piece 7 Lid 25 Base 26 Hanging part

Claims (2)

[Claims] A tape (3) is provided inside a box-shaped case body (1).
Is a magnetic tape cartridge in which a single reel 2 on which a tape 3 is wound is arranged, and a leader block 4 is connected to a pay-out end of a tape 3, wherein the leader block 4 has a base 25 connected to the tape end.
And the hook 26 captured by the loading mechanism of the tape drive are integrally formed of plastic. The loading opening 5 that allows the loading mechanism to enter is facing the peripheral side surface of the case body 1 and has an inner concave shape. A protruding piece 6 is provided on the inner opening edge of the loading opening 5 to hold and hold the base portion 25 and to fix and support the leader block 4 in a cantilever standby posture. A single reel type magnetic tape cartridge in which a lid 7 for closing the loading opening 5 on the outer surface of the case is supported by the case body 1 so as to be openable and closable. 2. In a front corner of the case body 1, a loading opening 5 is formed by cutting out a case bottom wall 20, a case front wall 21, and a case side wall 22, and a leader block is formed in a cut edge of the case bottom wall 20. The lid 7 is provided with a pair of protruding pieces 6 protruding therefrom. The lid 7 covers the loading opening 5 continuously with the case side wall 22 and the case front wall 21.
The lid 7 is pivotally supported by the case body 1 by pivotally supporting the rear end of the lid side wall 7a with the pin 32. The lid 7 and the case body 2. A single reel type magnetic tape cartridge according to claim 1, wherein a lid lock 33 for holding the lid 7 in a closed position is provided between the magnetic tape cartridge and the cover.