JPH08287640A - Tape cartridge - Google Patents

Abstract

(57) [Abstract] [Purpose] To prevent a difference in tape tension between forward and reverse running in a data cartridge. [Structure] First and second hubs 5 for winding a magnetic tape 4 on a base plate 2 of a data cartridge 1
6 and first and second tape guides 7 and 8 for guiding the winding of the magnetic tape 4 around the first and second hubs 5 and 6. The first hub 5 and the tape guide 7 and the second hub 6 and the tape guide 8 are arranged in line symmetrical positions with respect to the center line of the base plate 2 in the width direction.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tape cartridge such as a data cartridge used as an external recording medium of a computer.

[0002]

2. Description of the Related Art As a tape cartridge used as an external recording medium of a computer, that is, a data cartridge, ones shown in FIGS. 6 to 8 are known.

FIG. 6 is an exploded perspective view of the data cartridge 101. The data cartridge 101 is formed by attaching a cover 103 made of transparent resin on a base plate 102 made of aluminum.

The base plate 102 is a magnetic tape 10.
The first hub (supply hub) 105 and the second hub (take-up hub) 106 that wind up the roll No. 4 and the first hub described above.
The first tape guide 107 for guiding the winding of the magnetic tape 104 around the hub 105, and the second hub 106.
A second tape guide 108 that guides the winding of the magnetic tape 104 around the drive tape, a drive roller 109 disposed between the first tape guide 107 and the second tape guide 108, and a drive roller 109 that drives the magnetic tape 104. A loop-shaped drive belt 110, and a first corner roller (belt roller) 111 that brings the drive belt 110 into pressure contact with the peripheral surface of the first hub 105.
A second corner roller (belt roller) 112 that brings the drive belt 110 into pressure contact with the peripheral surface of the second hub 106 is provided.

As shown in FIG. 7, the drive roller 1 is
09 is the center line CL1 of the base plate 102 in the width direction.
It is placed on top.

[0006] The first hub 105 and the second hub 106 described above.
And are arranged at the line symmetry (HP1 = HP2) with respect to the center line CL1.

The first corner roller 111 and the second corner roller 112 are arranged in line symmetry (CP1 = CP2) with respect to the center line CL1.

The first tape guide 107 and the second tape guide 108 are arranged at positions which are non-axisymmetric (GP1 <GP2) with respect to the center line CL1.

As shown in FIG. 8, the data cartridge 101 is used by being loaded in the recording / reproducing apparatus 201.

The recording / reproducing apparatus 201 includes a detecting section 202 for detecting cartridge-in, tape position, etc.
Drive capstan roller 203 and magnetic head 20
4 and.

When the data cartridge 101 is loaded in the recording / reproducing apparatus 201, the loading is detected by the detection unit 20.
2 is detected, the drive roller 109 contacts the drive capstan roller 203, and the magnetic tape 1
04 contacts the magnetic head 204.

When the drive roller 109 and the drive belt 110 are driven by the drive capstan roller 203, the magnetic tape 104 runs and the magnetic head 204 performs recording / reproduction.

The base plate 102 and the cover 1
A head introduction portion 121 is provided at 03.

The head introducing section 121 is provided with a door 122.
Also, the door spring 123 normally closes the door.

When loaded in the recording / reproducing apparatus 201, the door 122 is opened by a door opening member (not shown) provided in the apparatus 201, and the magnetic head 204 enters the head introducing section 121. Magnetic tape 1
It comes in contact with 04.

[0016]

However, the above-mentioned conventional data cartridge has the following problems.

(1) As shown in the tension characteristic diagram of FIG. 9, there is a difference in the value of the tape tension between the forward running and the reverse running.

In particular, during forward running, the minimum tension is low and the max tension is high.

The data cartridge 101 uses the tape tension to attach the magnetic tape 104 to the magnetic head 20.
Since the signal is recorded / reproduced by being brought into pressure contact with No. 4, the difference in the tape tension value between the forward traveling and the reverse traveling as described above is a cause of the trouble during the recording / reproducing. Become.

(2) Further, as shown in the off-track characteristic diagram of FIG. 10, a difference occurs in the off-track amount (vertical fluctuation amount) of the magnetic tape 104 during forward running and reverse running.

In particular, the amount of off-track during reverse running increases.

The present invention has been made for the purpose of solving the above conventional problems.

The present invention was started by investigating the cause of the above conventional problems.

As a result, the above conventional problems are caused by the difference between the wrap angle (wrapping angle) of the magnetic tape 104 with respect to the first tape guide 107 and the wrap angle with respect to the second tape guide 108. I was caught.

The cause of the difference in the lap angle is that the first hub 105 and the second hub 106 are arranged in line symmetry (HP1 = HP2) with respect to the center line CL1 of the base plate 102. On the other hand, it was found that the first tape guide 107 and the second tape guide 108 were arranged at asymmetrical positions (GP1 <GP2).

The present invention eliminates the cause of the above-mentioned conventional problems, that is, the difference between the wrap angle of the magnetic tape 104 with respect to the first tape guide 107 and the wrap angle with respect to the second tape guide 108. By doing so, the above-mentioned conventional problems can be solved.

[0027]

SUMMARY OF THE INVENTION The present invention is directed to a first hub and a second hub for winding a magnetic tape, and a first tape for guiding the winding of the magnetic tape on the first hub. A guide, a second tape guide for guiding the winding of the magnetic tape onto the second hub, a drive roller arranged between the first tape guide and the second tape guide, and the drive roller Driven by the drive belt, a first corner roller that brings the drive belt into contact with the peripheral surface of the first hub, and a second corner roller that brings the drive belt into contact with the peripheral surface of the second hub. And a first tape guide and a second tape guide,
The hub and the second hub were arranged in line symmetry with respect to the center line in the cartridge insertion direction.

[0028]

The magnetic tape includes the first tape guide and the second tape guide.
The tape is wrapped around the tape guide at the same wrap angle.

[0029]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be described with reference to FIGS.

FIG. 1 shows a tape cartridge (hereinafter referred to as a data cartridge) 1 used as an external recording medium of a computer.

The data cartridge 1 has a width W ₂ and a length slightly larger than the width W ₁ and the length L ₁ of the conventional data cartridge 101 in order to increase the number of windings of the magnetic tape and increase the recording capacity. It is formed in L ₂ .

The data cartridge 1 is formed by mounting a transparent resin cover 3 on a base plate 2 made of aluminum.

As shown in FIG. 2, the base plate 2
Is the first hub 5 and the second hub 5 for winding the magnetic tape 4.
Hub 6, a first tape guide 7 for guiding the winding of the magnetic tape 4 on the first hub 5, and a second tape guide 7 for guiding the winding of the magnetic tape 4 on the second hub 6. A tape guide 8; a drive roller 9 arranged between the first tape guide 7 and the second tape guide 8; a loop-shaped drive belt 10 driven by the drive roller 9; The first corner roller 11 which makes the pressure contact with the peripheral surface of the first hub 5.
And a second corner roller 12 that brings the drive belt 10 into pressure contact with the peripheral surface of the second hub 6.

In the data cartridge 1, the number of windings of the magnetic tape 4 on the first hub 5 and the second hub 6 is increased as compared with the conventional data cartridge 101 to increase the recording capacity. In the case of the conventional data cartridge 101, the distance between the fifth hub 2 and the second hub 6 and the distance between the first and second hubs 5 and 6 and the drive roller 9 and the first and second corner rollers 11 and 12 are Has been set larger than.

The drive roller 9 is arranged on the center line CL2 of the base plate 2 in the width direction (direction orthogonal to the cartridge insertion direction).

The first hub 5 and the second hub 6 are arranged at positions symmetrical with respect to the center line CL2 (HP1 = HP2).

The first corner roller 11 and the second corner roller 12 are line-symmetric (C) with respect to the center line CL2.
It is located at the position (P1 = CP2).

The first tape guide 7 and the second tape guide 8 are line-symmetric with respect to the center line CL2 (GP1 = G).
P2) position.

As shown in FIG. 1, the cover 3 includes the first hub 5 and the second hub 6, the first and second tape guides 7 and 8, the drive roller 9, the first and second tapes. Are mounted on the base plate 2 with screws or the like so as to cover the corner rollers 11, 12 and so on.

A head insertion portion 21 is provided on one side portion on the front surface side of the cover 3 and at a position corresponding to the head insertion portion 2a of the base plate 2, and the drive roller 9 is exposed in the central portion. Is provided with a notch window 22, and a concave portion 23 for mounting an erroneous recording prevention member is provided on the upper surface of the other side.
Is provided, and an erroneous recording prevention member 24 is slidably attached to the recess 23.

Next, a recording / reproducing apparatus 301 for recording / reproducing data cartridge 1 of the embodiment will be described.

As shown in FIG. 1, the recording / reproducing apparatus 301
Are formed with a constant standard width W ₃ .

The recording / reproducing device 310 has a cartridge insertion portion 303 on the front panel 302 side.

Width W of the cartridge insertion portion 303
_{The value of 4} is set to a value as close as possible to the width W ₃ of the recording / reproducing apparatus 301 by utilizing the so-called surplus space existing in the conventional recording / reproducing apparatus.

The recording / reproducing apparatus 301 is provided near the first locator 304 provided on one side of the cartridge inserting section 303 and the other side of the cartridge inserting section 303, and has the first locator. A second locator 305 that guides the insertion of the conventional tape cartridge 101 between the locator 304 and the second locator 30.
5 of the data cartridge 1 of the embodiment, which is arranged outside (the other side of the cartridge insertion portion 303) and formed wider than the conventional data cartridge 101 with the first locator 304. A third locator 306 is provided to guide the insertion.

The first locator 304 serves as a reference surface for inserting (loading) the data cartridge, and is fixed to one side of the cartridge inserting portion 303.

A guide groove 311 for guiding the insertion of the data cartridge is provided on the side surface of the first locator 304 which faces the second locator 305.

The second locator 305 is the first locator.
Has a guide groove 312 on the far end side opposite to the locator 304, and the guide groove 312 and the guide groove 311 of the first locator 304 guide insertion of the conventional data cartridge 101. It has become.

A front panel 30 on the side of the second locator 305 facing the first locator 304.
The end portion on the second side is a first inclined surface 313 which is continuous with the guide groove 312, and the first inclined surface 313 guides one side portion of the base plate 102 of the conventional data cartridge 101, The guide groove 312 can be smoothly fitted.

On the upper surface of the second locator 305 on the front panel 302 side, there is provided a second inclined surface 314 that gradually rises as it goes deeper.

When the wide data cartridge 1 is inserted, the second locator 305 is pushed down by the bottom portion of the data cartridge 1 and pivots downward about the shaft 315 to move the cartridge insertion portion 303. The bottom plate 303a is retracted (stored) below.

Therefore, when the data cartridge 1 having the widened width is inserted into the cartridge insertion portion 303, as described above, the bottom of the data cartridge 1 is provided with the second inclination provided on the upper surface of the second locator 305. The second locator 305, as shown in FIG.
Press down.

When the second locator 305 is pushed down, the inner side surface of the third locator 306 arranged on the outer side of the second locator 305 is exposed, and the guide groove 316 provided on the inner side surface appears. One side portion of the base plate 2 of the data cartridge 1 is fitted into the guide groove 316, and the data cartridge 1 has the first locator 3
The insertion is guided between 04 and the third locator 306.

Then, when the data cartridge 1 is inserted to a predetermined position, a positioning roller (not shown) provided in the recording / reproducing device 301 fits in the roller fitting groove 2b provided in the base plate 2 and The data cartridge 1 is configured to be positioned and fixed in the cartridge insertion portion 303.

The recording / reproducing apparatus 301 includes a detection unit 321 for detecting cartridge-in (loading of cartridge) and tape position, and a drive capstan roller 32.
2 and a magnetic head 323 and the like.

When the data cartridge 1 or 101 is loaded in the cartridge insertion section 302, the data cartridge 1 or 10 is detected by the detection section 321.
1 is detected, the drive capstan roller 322 engages with the drive capstan roller 9 or 109 of the data cartridge 1 or 101, and the magnetic head 323 causes the magnetic force of the data cartridge 1 or 101. Contact the tape 4 or 104.

When the drive capstan roller 322 is rotated, the drive roller 9 or 109 rotates and the drive belt 10 or 101 of the data cartridge 1 or 101 runs.

The drive of the drive belt 10 or 110 causes the magnetic tape 4 or 104 to travel, and the magnetic head 323 records or reproduces data on or from the magnetic tape 4 or 104.

The recording / reproducing apparatus 301 uses the first locator 304 as the reference locator as described above.
The conventional data cartridge 101 and the data cartridge 1 of the embodiment are loaded in the cartridge insertion portion 303, and the drive capstan roller 322 is provided in the conventional data cartridge 101.
Is arranged on an extension of the center line CL1 in the width direction of the base plate 102.

Therefore, as shown in FIG. 4, the data cartridge 1 of the embodiment in which the width of the conventional data cartridge 101 is widened and the drive roller 9 is arranged on the center line CL2 in the width direction of the base plate is used as the recording / reproducing apparatus. 301
Drive capstan roller 32 when loaded in
The position of the drive roller 9 is displaced from the position of 2.

Therefore, the position deviation is compensated by making the diameter of the drive roller 9 larger than the diameter of the drive roller 109 of the conventional data cartridge 101, and the drive roller 109 is brought into contact with the drive capstan roller 322. It is configured.

FIG. 5 shows a modification of the data cartridge 1 of the present invention.

In this modification, the rotation of the drive capstan roller 322 is transmitted to the drive roller 9 via the intermediate roller 31.

The intermediate roller 31 has a large diameter portion 32 and a small diameter portion 33.

The peripheral surface of the large diameter portion 32 is pressure-bonded to the peripheral surface of the drive capstan roller 322.

The peripheral surface of the small diameter portion 32 is pressed against the peripheral surface of the drive roller 9.

When the drive capstan roller 322 is rotated, the rotation of the drive capstan roller 322 is transmitted to the intermediate roller 31 by friction, and the rotation of the intermediate roller 31 is transmitted to the drive roller 9 by friction. It is configured to be.

In order to more reliably transmit the rotation of the intermediate roller 31 to the drive roller 9, the intermediate roller 3
A gear may be formed on the contact surface between 1 and the drive roller 9.

The tape cartridge 1 of the embodiment has the above-described structure and has a width and a length larger than those of the conventional data cartridge 101. Therefore, the magnetic tapes for the first and second hubs 5 and 6 are accordingly increased. It is possible to increase the recording capacity by increasing the number of turns of 4.

Also, the first hub 5 and the tape guide 7
And the second hub 6 and the tape guide 8 are arranged in line symmetry with respect to the center line CL2 of the base plate 2 in the width direction, the magnetic tape 4 includes the first tape guide 7 and the second tape guide. It is wrapped with the same wrap angle with respect to 8.

In this way, the forward running of the data cartridge 1 of the embodiment in which the wrap angle of the magnetic tape 4 with respect to the first tape guide 7 and the wrap angle of the magnetic tape 4 with respect to the second tape guide 8 are made equal to each other. The values of the tape tension at the time of running and in the reverse running were almost equal as shown in FIG.

It was also confirmed that the amount of off-track during the forward running and the reverse running did not change.

In the embodiment, the first hub 5 and the tape guide 7 and the second hub 6 and the tape guide 8 are
Although the case where the base plate 2 is arranged at a position symmetrical with respect to the center line CL2 in the width direction of the base plate 2 is shown, the first hub 5 and the tape guides are not always required with the center line CL2 in the width direction of the base plate 2 as a reference. 7 and second hub 6
It is not necessary to dispose the tape guide 8 and the tape guide 8 at the line symmetric position.
The second tape guide 8 and the second tape guide 8 may be arranged line-symmetrically.

Further, the tape cartridge is not limited to the data cartridge of the embodiment, and any drive cartridge and drive belt may be used as long as the magnetic tape is run.

[0075]

The tape cartridge of the present invention has the following effects.

(1) The tape cartridge according to claim 1 is
The wrap angle of the magnetic tape with respect to the first tape guide and the wrap angle of the second tape guide can be set to the same value.

Therefore, the difference between the tape tension between the first tape guide of the magnetic tape and the tape tension between the second tape guide and the tape tension difference between the forward running and the reverse running, which is caused by the difference between the wrap angle and the magnetic tape, It is possible to prevent fluctuations in the off-track amount of the.

(2) The tape cartridge according to claim 2 is
The wrap angle of the drive belt with respect to the first hub and the wrap angle of the drive belt with respect to the second hub can be made equal to each other, whereby the running of the magnetic tape can be stabilized.

[Brief description of drawings]

FIG. 1 is a perspective view.

FIG. 2 is a plan view with a cover removed.

FIG. 3 is a perspective view of a main part of the recording / reproducing apparatus.

FIG. 4 is a plan view of a main part in a state of being loaded in the recording / reproducing device.

FIG. 5 is a plan view of a modified example.

FIG. 6 is an exploded perspective view of a conventional example.

FIG. 7 is a plan view of a conventional example.

FIG. 8 is a plan view of a recording / reproducing device.

FIG. 9 is a tape tension characteristic diagram.

FIG. 10 is an off-track characteristic diagram.

[Explanation of symbols]

 1 ... Tape cartridge (data cartridge) 4 ... Magnetic tape 5, 6 ... First and second hubs 7, 8 ... First and second tape guides 9 ... Drive roller 10 ... Drive belt

 ─────────────────────────────────────────────────── ─── Continued Front Page (72) Inventor Masanori Sato 6-735 Kita-Shinagawa, Shinagawa-ku, Tokyo Sony Corporation

Claims (2)

[Claims] 1. A first hub and a second hub for winding a magnetic tape, a first tape guide for guiding the winding of the magnetic tape on the first hub, and a second hub. A second tape guide for guiding the winding of the magnetic tape onto the magnetic tape, a drive roller arranged between the first tape guide and the second tape guide, and a drive belt driven by the drive roller, A first corner roller for bringing the drive belt into contact with the peripheral surface of the first hub; and a second corner roller for bringing the drive belt into contact with the peripheral surface of the second hub. The first tape guide and the second tape guide are arranged in line-symmetrical positions with respect to a center line in the cartridge insertion direction between the first hub and the second hub. Cartridge. 2. The drive roller according to claim 1, wherein the drive roller is arranged on a center line in the cartridge insertion direction between the first hub and the second hub, and the first corner roller and the second corner are provided. What is Laura?
A tape cartridge arranged in line symmetry with respect to the center line.