JP3319463B2 - Pegasus type data cartridge - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a Pegasus type data cartridge most suitable for, for example, high-density recording (back memory) of CPU data.

[0002]

2. Description of the Related Art The applicant of the present invention has proposed a Pegasus type data cartridge of the prior application (for example, Japanese Patent Application No. 2-40 / 1990).
No. 0760) has been filed earlier.

In this kind of Pegasus type data cartridge, as shown in FIGS. 3 and 4, a cartridge 1 is formed in a thin box shape formed of a transparent synthetic resin on a metal base plate 2 such as an aluminum plate. The upper cover 3 is formed by screwing or the like. Then, the small width portion 1A width W ₁ in the lateral direction is small in the cartridge 1, the left-right direction width W
₂ is a large width part 1B and cartridge center P ₁
Are formed integrally symmetrically to the left and right.

[0006] A pair of left and right tape reels 4 are rotatably pivoted symmetrically with respect to the cartridge center P ₁ at a large interval inside the large width portion 1 B of the cartridge 1. The magnetic tape 5 wound around the cartridge center P inside the narrow portion 1A
It is passing over a substantially U-shape along the front surface 1a of the small width portion 1A and guided by the right and left pair of tape guides 6, 7 mounted symmetrically shaped with respect to _1.

The cartridge center P ₁ inside the magnetic tape 5 inside the narrow portion 1A of the cartridge ₁
A drive roller 8 is rotatably pivoted on the upper side, and a pair of left and right corner rollers 9 is attached to a pair of left and right corner rollers 9 on a pair of left and right corners on the rear surface 1b side opposite to the small width portion 1A inside the large width portion 1B. It is pivotally supported to be symmetrical with respect to ₁ and rotatable.

An elastic drive belt 10 formed of a rubber belt or the like is wound around the drive roller 8 and both corner rollers 9 in a substantially T-shape with strong tension. A pair of left and right drive units 10 a between the roller 8 and both corner rollers 9 are pressed against the outer periphery of the tape winding unit 5 a of the magnetic tape 5 wound around the outer periphery of both tape reels 4.

A notch 11 is formed in the base plate 2 and the upper cover 3 at the front surface 1a of the small width portion 1A. The two tape reels 4, the two tape guides 6, the drive rollers 8, the two corner rollers 9 and the like are inserted into the outer periphery of the metal support shaft 12 set on the base plate 2 by these center holes 13 and are rotatable. Is pivoted to.

As shown in FIG. 1B, both corner rollers 9 (and the driving roller 8) are formed of a synthetic resin such as polyacetal resin, and a belt winding surface 14 is formed on the outer periphery thereof. Grease 1 for torque control is formed in these central holes 13.
5 are filled.

In this kind of Pegasus type data cartridge, the small width portion 1A of the cartridge 1 is inserted into the cartridge insertion hole 22 formed in the front panel 21a of the recording / reproducing device 21 from the direction of the arrow a and mounted. . Then, an output roller 24 such as a rubber roller driven by a spindle motor 23 in the recording / reproducing apparatus and a magnetic head 25 are relatively inserted into the notch 11 of the cartridge 1, and the output roller 24 and the magnetic head 25 are inserted.
Are pressed and contacted with the drive roller 8 and the magnetic tape 5, respectively.

Therefore, when the cartridge 1 is mounted on the recording / reproducing apparatus 21, the large width portion 1B protrudes symmetrically outside the cartridge insertion hole 22.

When the cartridge 1 is mounted, the drive roller 8 is driven to rotate in the direction of arrow b by the output roller 24 in response to a command signal from the CPU, and the drive belt 10 is driven to rotate in the direction of arrow c. The two tape reels 4 are rotationally driven in the direction of arrow d by the two drive units 10a of the drive belt 10 via the two tape winding units 5a, and the magnetic tape 5 is moved in the direction of arrow e by 25 to 120 inches / sec.
It is run at high speed. The data of the CPU is recorded on and reproduced from the magnetic tape 5 by the magnetic head 25.

The Pegasus type data cartridge has a large portion 1B which protrudes out of the cartridge insertion hole 22 when the data cartridge is mounted on the recording / reproducing apparatus 21. A pair of tape reels 4
Are rotatably stored at large intervals, the winding diameter of the magnetic tape 3 of these tape reels 4 can be made sufficiently large, and a large amount of data of the CPU can be recorded.

When the eject button 26 provided on the front panel 21a is pressed with a fingertip, the lock of the small width portion 1A in the cartridge insertion slot 22 is released, and the cartridge 1 is moved from the cartridge insertion hole 22 through the arrow f. It is configured so that it can be extracted in the direction.

[0014]

The Pegasus-type data cartridge of the prior application has a small width portion 1A and a large width portion 1A of the cartridge 1 as shown by a chain line in FIG.
B is connected to a pair of left and right connecting surfaces 1e connecting the left and right side surfaces 1c and 1d with the front panel 21a of the recording / reproducing apparatus 21.
And formed in parallel.

Therefore, when the cartridge 1 is mounted with the small width portion 1A of the cartridge 1 inserted into the cartridge insertion hole 22 of the recording / reproducing apparatus 21, one of the connection surfaces 1e of the cartridge 1 is connected to the eject button provided on the front panel 21a. 26 gone remarkably close, since the gap G ₁ between them is very small, the operator there is a problem that the hard to manipulate the eject button 26 with a fingertip.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and provides a Pegasus type data cartridge in which an eject button can be easily operated while the cartridge is mounted on a recording / reproducing apparatus. It is intended to be.

[0017]

In order to achieve the above object, a Pegasus-type data cartridge according to the present invention comprises a small-width portion to be inserted into a cartridge insertion hole of a recording / reproducing apparatus, and the small-width portion includes the cartridge. A cartridge formed integrally with a large-width portion projecting substantially symmetrically to the left and right sides outside the cartridge insertion hole in a state inserted into the insertion hole; and a rotatable pivot inside the large-width portion of the cartridge. A pair of left and right supported tape reels, a magnetic tape wound around the pair of left and right tape reels and wound along the narrow portion of the cartridge, and rotatable inside the narrow portion of the cartridge. A drive roller pivotally supported, a pair of left and right corner rollers rotatably supported inside the large width portion of the cartridge, and a pair of left and right drive rollers A pair of left and right drive units, which are wound around the corner rollers in a substantially T-shape, and a pair of left and right drive units which are in pressure contact with the outer periphery of the tape winding units of the pair of left and right tape reels; A Pegasus-type data cartridge configured to rotationally drive a belt and rotationally drive the pair of left and right tape reels via the pair of left and right tape winding units by the pair of left and right driving units of the drive belt; The width of the small-width portion in the direction of insertion and removal with respect to the cartridge insertion hole is formed longer than the insertion depth of the small-width portion into the cartridge insertion hole. A connection surface for connecting the left and right side surfaces of the portion is formed in a substantially tapered shape that expands in the drawing direction.

[0018]

The Pegasus type data cartridge of the present invention constructed as described above has a small width portion of the cartridge in the direction of insertion and removal in the cartridge insertion hole.
The connecting surface, which is formed longer than the insertion depth of the small width portion into the cartridge insertion hole and connects the left and right side surfaces of the small width portion and the left and right side surfaces of the large width portion, is directed toward the above-described removal direction. Since the cartridge is formed in a substantially tapered shape, a sufficient gap can be formed between the connection surface and the eject button on the front panel of the recording / reproducing apparatus when the small width portion of the cartridge is inserted into the cartridge insertion hole. .

[0019]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a Vegasus type data cartridge to which the present invention is applied will be described below with reference to FIG.
This will be described with reference to FIG. In FIGS. 3 and 4, the description of the parts already described in the section of the related art will not be repeated.

First, in the Pegasus type data cartridge of the present invention, as shown by solid lines in FIGS. 3 and 4, the insertion direction (the direction of arrow a) of the small width portion 1A of the cartridge 1 into the cartridge insertion hole 22 and the removal direction. (arrow b direction) of the length L _1, lengthened than the insertion depth L ₂ of the small width portion 1A to the cartridge insertion hole 22, left and right side surfaces 1c and greatly portion 1B of the small width portion 1A Left and right sides 1
The connection surface 1e is formed in a tapered shape that expands in the drawing direction (the direction of the arrow f). The connection surface 1e has a tapered shape of about 4
It may be formed as either a slope inclined linearly at an angle θ such as 5 ° or a gentle curved surface.

In the Pegasus type data cartridge of the present invention, as shown in FIGS. 3 and 4, the small width portion 1A of the cartridge 1 is inserted into the cartridge insertion hole 22 of the recording / reproducing apparatus 21 and mounted. In the connection surface 1
between the eject button 26 of the front panel 21a of the e and the recording and reproducing apparatus 21 can form a sufficient gap G ₂ by the operator can easily insert a finger tip.

[0022] Therefore, when ejecting the Pegasus type data cartridge from the recording and reproducing apparatus 21, the operator is able easily inserted into the gap G ₂ a fingertip, is featured in that easily very operate the eject button 26.

In this kind of Pegasus type data cartridge, both corner rollers 9 shown in FIG.
A speed difference is generated between the two drive units 10a of the drive belt 10 by the rotation load of the
A predetermined tape tension and a tape driving force are generated therebetween. Therefore, if the variation in the tape tension and the tape driving force is large, poor contact between the magnetic tape 5 and the magnetic head 25 occurs, or the running property of the magnetic tape 5 deteriorates, and the accuracy of recording and reproduction deteriorates significantly. There is a problem to say.

On the other hand, this kind of Pegasus type data cartridge is different from a standard type mini data cartridge in which the entire cartridge 1 fits completely in the cartridge insertion hole 22, and the path length of the magnetic tape 5 between the two tape reels 4 and the driving belt The path length between the driving roller 8 and both corner rollers 9 is very long. In addition, the tape drive speed differs depending on the CPU of each company.
Since the range is very wide as inch / sec, it is very difficult to stably obtain the tape tension and the tape driving force at each tape driving speed.

At this time, in the Pegasus type data cartridge of the prior application, the corner rollers of a standard type mini data cartridge are used for both corner rollers 9 as they are.

That is, as shown in FIG. 1B, the Pegasus type data cartridge of the prior application example has an outer diameter A1 which is the maximum diameter of the belt winding surface 14 of both corner rollers 9.
Was 10.86 mm, the inner diameter B1 which was the diameter of the center hole 13 was 3.22 mm, and the ratio of the outer diameter A1 to the inner diameter B1 was about A1 / B1 = about 3.37 times.

However, in the Pegasus-type data cartridge of the prior application, since the outer diameter dimension A1 of both corner rollers 9 is small, the rotation speed of both corner rollers 9 during running of the magnetic tape 5 increases, and The friction loss of the corner roller 9 increases, and the rotational load increases. In addition,
The friction loss is determined by the relationship of the moment and is proportional to B1 / A1.

Accordingly, as described above, the Pegasus type data cartridge of the prior application has a problem that the magnetic tape 5 and the drive belt 10 have a long path length and the rotational load of both corner rollers 9 is large. 5 and drive belt 9
In this case, vibration was easily generated.

FIGS. 5A and 5B show the Pegasus type data cartridge of the prior application in which the outer diameter A1 of both corner rollers 9 is 10.86 mm and the inner diameter B1 is 3.22 mm. The tape tension and tape driving force of the magnetic tape 5 are set to 30 inch / sec, 80 inch / sec, 120 in.
It is the graph measured and shown about three tape drive speeds of ch / sec. The ideal upper limit of the tape tension shown in FIG. 5A is approximately 108 g, and the lower limit is approximately 1 g.
5B, and the ideal upper limit of the tape driving force shown in FIG. 5B is about 128 g, and the lower limit is about 27 g.

As is apparent from this graph, in the Pegasus type data cartridge of the prior application, when the tape driving speed is increased, the magnetic tape 5 and the driving belt 10 are liable to generate vibration, and the tape tension and the tape driving force are increased. Are significantly increased, and both the tape tension and the tape driving force greatly deviate from the ideal upper limits. Therefore, when the tape driving speed is increased, there is a problem that a contact failure between the magnetic tape 5 and the magnetic head 25 occurs, and the running property of the magnetic tape 5 is deteriorated, and the accuracy of recording and reproduction is significantly deteriorated.

As a method of reducing the tape tension and the tape driving force, there is a method of reducing the tension of the drive belt 10. However, if the tension of the drive belt 10 is reduced, the winding of the magnetic tape 5 around both tape reels 4 may be disturbed. This is not preferable because the problem of off-track of the magnetic head 25 occurs.

Therefore, in the Pegasus type data cartridge of the present invention, as shown in FIG. 1A, the outer diameter dimension A2 which is the maximum diameter of the belt winding surface 14 of the pair of right and left corner rollers 9 is shown in FIG. Outer diameter A of the prior application example shown in FIG.
15.5 ± 0.05mm larger than 10.86mm which is 1
The diameter difference is 4.64 mm. The inner diameter B2, which is the diameter of the center hole 13 of the pair of left and right corner rollers 9, is 3.22 mm, which is the same as in the prior application.

Accordingly, the outer diameter dimension A with respect to the inner diameter dimension B2
2 is A2 / B2 = about 4.81 times.

As a result, the Pegasus type data cartridge of the present invention is different from the Pegasus type data cartridge of the prior application in that the rotational speed of the pair of left and right corner rollers 9 during running of the magnetic tape 5 shown in FIG. In comparison, the outer diameters A2 and A1 are reduced by an amount equivalent to the diameter difference (4.64 mm), and the friction loss of these corner rollers 9 is reduced. In addition, the friction loss is determined by the relationship of the moment, and FIG.
Is proportional to B2 / A2. Therefore, since A2> A1, B2 / A2 <B1 / A1.

The rotational load of the corner rollers 9 can be reduced by the reduced friction loss between the pair of left and right corner rollers 9, so that the vibration of the magnetic tape 5 and the drive belt 10 having a long path length is suppressed. Therefore, the tape tension of the magnetic tape 5 and the tape driving force can be stabilized.

In FIGS. 2A and 2B, the outer diameter A2 of both corner rollers 9 is 15.5 ± 0.05 mm, and the inner diameter B2 is 3.22 mm, which is the same as the prior application. The tape tension and the tape driving force of the magnetic tape 5 of the Pegasus type data cartridge of the present invention are set to 30 inches / sec.
It is the graph measured and shown about three tape drive speeds of 80 inch / sec and 120 inch / sec.

As is clear from this graph, in the Pegasus type data cartridge of the present invention, even when the tape driving speed is increased, almost no increase in the characteristic values of the tape tension and the tape driving force is observed. At the tape driving speed, the characteristic values of the tape tension and the tape driving force have a small difference, and these characteristic values can be sufficiently set within the ideal upper limit value and lower limit value. Obtained.

Accordingly, in the Pegasus type data cartridge of the present invention, since the tape tension and the tape driving force of the magnetic tape 5 are both low and stable even when the tape driving force is increased, the magnetic tape 5 and the magnetic tape 5 are not connected to each other. Good contact of the head 25 can be ensured, and the running property of the magnetic tape 5 can be remarkably stabilized, so that the recording and reproducing accuracy can be remarkably improved. It should be noted that if the tape driving force can be reduced, the load applied to the spindle motor 23 will be reduced, and the effect of increasing the life of the spindle motor 23 will also occur.

By the way, the inventor of the present invention sets several types of roller samples (outer diameter A2 = 14.0 mm, = 15.0 mm,
= 15.5 mm), and as a result of investigating the practical characteristics, the ratio of the inner diameter B2 to the outer diameter A1 was about 4.
It was found that the characteristics shown in the graph of FIG. The fact that the above ratio is about 4.5 times or more means that the actual dimension of the outer diameter dimension A2 is about 14.5 mm or more. Unless the position is changed, the maximum value of the outer diameter dimension A2 is inevitably determined from the space in the cartridge 1.

[0040]

The Pegasus type data cartridge of the present invention configured as described above has the following effects.

The length of the small width portion of the cartridge in the direction of insertion and removal with respect to the cartridge insertion hole is formed longer than the insertion depth of the small width portion into the cartridge insertion hole. A connection surface connecting between the left and right side surfaces of the width portion is formed in a tapered shape which expands toward the extraction direction, and a small width portion of the cartridge is inserted into the cartridge insertion hole.
Because a sufficient gap can be formed between the connection surface and the eject button on the front panel of the recording / reproducing device,
When ejecting a Pegasus-type data cartridge from the recording / reproducing device, the operator can easily insert a fingertip into the gap, and the eject button is very easy to operate.

[Brief description of the drawings]

FIG. 1A is a vertical sectional side view illustrating a corner roller of a Pegasus type data cartridge of the present invention, and FIG. 1B is a corner of a Pegasus type data cartridge of the prior application. It is a vertical cross-sectional side view explaining a roller.

FIG. 2 is a graph showing characteristics of a tape tension and a tape driving force of the Pegasus type data cartridge of the present invention.

FIG. 3 is a partially cutaway plan view showing a Pegasus-type data cartridge of the present invention.

FIG. 4 is a side view of FIG. 3;

FIG. 5 is a graph showing characteristics of a tape tension and a tape driving force of the Pegasus type data cartridge of the prior application example.

[Explanation of symbols]

 1 is a cartridge, 1A is a small width portion of the cartridge, 1
B is a large portion of the cartridge, 1c is a small portion of the cartridge.
The left and right sides of the width part, 1d is the large width part of the cartridge
Left and right sides, 1e is the connection of the left and right sides of the cartridge
Surface, 4 is a tape reel, 5 is a magnetic tape, 5a is a magnetic tape.
Tape winding part, 8 is a drive roller, 9 is a corner roller
Roller, 10 is the drive belt, 10a is the drive of the drive belt
Part, 12 is a support shaft, 13 is a center hole, 21 is a recording / reproducing device,
21a is a front panel of the recording / reproducing device, 22 is a cart
The ridge insertion hole 23 is a spindle motor (drive motor).
), 25 is a magnetic head, 26 is an eject button, G_Two Is
Gap, L₁ Is the length of the narrow part, L _Two Is the insertion depth of the narrow part
A is the cartridge insertion direction, f is the cartridge removal
Direction.

Claims (1)

(57) [Claims] 1. A small width portion to be inserted into a cartridge insertion hole of a recording / reproducing apparatus, and the small width portion is substantially symmetrically formed on both left and right sides outside the cartridge insertion hole in a state where the small width portion is inserted into the cartridge insertion hole. A cartridge formed integrally with a large-width portion protruding into the cartridge; a pair of left and right tape reels rotatably supported inside the large-width portion of the cartridge; A magnetic tape wound along a narrow portion of the cartridge, a drive roller rotatably pivoted inside the narrow portion of the cartridge, and a rotatable pivot inside a large portion of the cartridge A pair of left and right corner rollers, and a pair of left and right driving units are wound around the driving roller and the pair of left and right corner rollers in a substantially T-shape. And a drive belt which is pressed against the outer periphery of the tape winding portion of the tape reel, the drive belt and rotated by the drive roller,
In a Pegasus type data cartridge configured to rotate the pair of left and right tape reels via the pair of left and right tape winding units by the pair of left and right driving units of the drive belt, the small width portion of the cartridge The length of the cartridge insertion hole in the direction of insertion and removal is formed longer than the insertion depth of the small width portion into the cartridge insertion hole, and the left and right side surfaces of the small width portion and the left and right side surfaces of the large width portion are formed. A Pegasus-type data cartridge, characterized in that a connection surface for connecting between the two is formed in a tapered shape that expands in the drawing direction.