JPH06111524A - Data cartridge - Google Patents

Abstract

PURPOSE:To allow a pair of corner rollers to be used in common for two kinds of data cartridges having the different tape width of a magnetic tape. CONSTITUTION:A center P3 of the nearly drum-shaped belt winding surface 8a formed on the outer periphery of the corner roller 8 is arranged so as deviating downward or upward against the center position P4 in the vertical longitudinal direction of the corner roller 8. For two kinds of data cartridges having the different tape width of magnetic tape 5, the corner roller 8 is used by means of turning it upside down.

Description

Detailed Description of the Invention

[0001]

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

[0002]

2. Description of the Related Art Conventionally, for example, Japanese Patent Publication No. 52-14976 has been known as a data cartridge for high-density recording (backup memory) of CPU data.

A conventional data cartridge of this type is shown in FIG.
As shown in FIG. 9, the cartridge 1 has a thin box-shaped upper cover which is an upper half formed by a synthetic resin having a light-transmitting property on a base plate 2 made of an aluminum plate or a synthetic resin plate which is a lower half. It is formed by screwing 3 on. A pair of left and right tape reels with upper and lower flanges 4 made of synthetic resin are formed on the base plate 2.
Is rotatably supported, and a magnetic tape 5, which is a tape, is wound around these tape reels 4. This magnetic tape 5 is guided by three flanged tape guides 6 attached to the base plate 2 and is hung along the inside of the front wall 3 a of the upper cover 3. A drive roller 7 and a pair of left and right corner rollers 8 made of synthetic resin are rotatably supported at substantially the center of the front edge of the base plate 2 and both left and right corners of the rear edge. Then, these drive roller 7 and both corner rollers 8
The elastic drive belt 9 formed of a rubber belt or the like is wound around the T-shape with a strong tension. A pair of left and right drive portions 9a between the drive roller 7 of the drive belt 9 and both corner rollers 8 are provided on the outer circumference of the pair of left and right tape winding portions 5a of the magnetic tape 5 wound around the tape reels 4. Being pressed against.

The tape reels 4 and the three rollers 7 and 8 are formed on the base plate 2 vertically by press fitting or the like.
It is inserted by 1 and is rotatably supported. A tape end photodetection mirror 12 is attached to the inside of the running path of the magnetic tape 5.

Both tape reels 4 are formed of ABS resin or the like, and upper and lower flanges 4a and 4b are formed on these. And the upper flange 4
A pivot 4c is integrally formed on the upper center of a,
A hub 4d is integrally formed on the upper center of the lower flange, and a cylindrical boss 4e is integrally formed on the center of the hub 4d. The three rollers 7 and 8 are also formed of ABS resin or the like, and substantially drum-shaped belt winding surfaces 7a and 8a for stabilizing the running height of the drive belt 9 are integrally formed on their outer peripheral surfaces. Has been done. A large-diameter roller portion 7b is integrally formed on the upper end of the drive roller 7,
A cylindrical boss 7c, 8 is provided at the center of these rollers 7, 8.
b is integrally molded. In addition, upper and lower flanges 6 that regulate the running height of the magnetic tape 5 are provided above and below the tape guide 6.
a and 6b are integrally formed.

The magnetic tape 5 is a double tape reel 4
Is wound around the outer periphery of the hub 4d between the upper and lower flanges 4a and 4b of the upper and lower flanges 6a and 6b of the three tape guides 6.
It is configured to be guided while traveling. The driving belt 9 is wound around the outer circumferences of the substantially drum-shaped belt winding surfaces 7a and 8a of the three rollers 7 and 8, and the running height of the driving belt 9 is increased by these belt winding surfaces 7a and 8a. It is configured to be stable. At this time, the magnetic tape 5 and the center P ₁ of the drive belt 9 must be aligned with each other.

A pair of left and right groove-like portions 13 cut in parallel from the front wall 3a are formed parallel to each other outside the left and right side walls 3b of the upper cover 3, and these groove-like portions 13 are formed.
A pair of left and right positioning notches 14 are formed on the front end sides of the left and right end portions 2a of the base plate 2 therein.

Next, as shown in FIG. 4, when the data cartridge is mounted on the recording / reproducing apparatus, a notch formed on one side of the drive roller 7 on the front edge side of the base plate 2 and the upper cover 3. An opening / closing door 18 attached between the base plate 2 and the upper cover 3 so as to open and close the portion 17 is opened in the direction of the arrow a as indicated by a one-dot chain line, and the magnetic head 19 on the recording / reproducing apparatus side is notched. It is inserted in the direction 17 from the direction of the arrow b and contacts the magnetic tape 5. At the same time, a motor roller 20, such as a rubber roller, which is rotatably driven by a motor (not shown) on the recording / reproducing apparatus side, is shown by an arrow in an opening 18 formed in the front wall 3a of the upper cover 3 in front of the drive roller 7. c
Inserted from the direction, the motor roller 20 is pressure-bonded to the outer periphery of the large-diameter roller portion 7b integrally formed on the belt winding surface 7a of the drive roller 7. Then, when the drive roller 7 is rotationally driven in the direction of arrow d by the motor roller 20 and the drive belt 9 is rotationally driven in the direction of arrow e, the drive rollers 9a drive the both tape winding portions 5a.
Both tape reels 4 are rotationally driven in the direction of the arrow e via the magnetic tape 5 and the magnetic tape 5 is in the direction of the arrow f in the range of 25 to 120 inch / sec.
The magnetic head 15 is configured to record and reproduce CPU data on the magnetic tape 5 by traveling at a high speed.

Conventionally, as shown in FIGS. 8 and 9, the pivots 4c at the upper center of both tape reels 4 are lowered to the lower surface 3d of the ceiling wall 3c of the upper cover 3 against the elasticity of the upper flange 4a. By pressing from above, the lower ends of the bosses 4e of these tape reels 4 are elastically brought into contact with the upper surface 2b of the base plate 2. The pivot 4c has a lower surface 3
Positioning is performed in a cylindrical positioning rib 23 having a small height and integrally formed with d. In addition, the ceiling wall 3 of the upper cover 3
By pressing the upper ends of the bosses 7c and 8b of the drive roller 7 and the corner rollers 24 downward from the outer periphery of the support shaft 10 by the three roller pressing ribs 24 having a small cylindrical shape and integrally formed on the lower surface 3d of c, The lower ends of the bosses 7c and 8b of the rollers 7 and 8 are in contact with the upper surface 2b of the base plate 2.

Therefore, the two tape reels 4 and the three rollers 7 and 8 are deviated to the lower side of the space height H between the base plate 2 of the cartridge 1 and the ceiling wall 3c of the upper cover 3. The space height H cannot be effectively used at all, and the dimension A ₁ between the upper and lower flanges 4a and 4b of both tape reels 4 that regulates the tape width W ₁ of the magnetic tape 5 and the upper edge 5b of the magnetic tape 5 are The height dimension A ₂ of the large diameter roller portion 7b at the upper end of the driving roller 7 which interferes was very small.

[0011] As a result, conventionally, it is impossible to use a magnetic tape 5 having a large tape width W _1, the tape width W ₁ of the magnetic tape 5 which conventionally use was 1/4 inch.

By the way, as the data cartridge of this type, there are standardized two kinds of cartridges, that is, a small cartridge (hereinafter referred to as S type) and a large cartridge (hereinafter referred to as L type). Also in the cartridge, the tape width W ₁ of the magnetic tape 5 was standardized to 1/4 inch.

Incidentally, as shown in FIG. 7, a width X in the left-right direction and a depth Y in the front-rear direction of this type of data cartridge.
And the thickness Z is S = 80.9 for the S type.
8 mm, Y = 61.1 mm, Z = 15.0 mm are standardized. For L type, X = 152.4 mm,
The specifications were unified to Y = 101.6 mm and Z = 17.1 mm.

As described above, the conventional data cartridge has a problem that the recording capacity is small because the tape width W ₁ of the magnetic tape 5 is only 1/4 inch.

Therefore, the inventor of the present invention, as shown in FIG. 8, includes the upper edge 5b of the magnetic tape 5 and the ceiling wall 3 of the upper cover.
By using the space H ₀ between the lower surface 3d of c and the upper edge 5b of the magnetic tape 5 upward, the tape width W of the magnetic tape 5 can be increased without changing the thickness Z of the cartridge 1. We considered expanding ₁ to increase the recording capacity of the magnetic tape 5.

[0016]

However, if the tape width of the magnetic tape 5 is expanded in this way, the magnetic tape 5
3 to match the center P ₁ of the drive belt 9 with
Belt-shaped winding surfaces 7a, 8 of the two rollers 7, 8
a center must also be increased in accordance with the center P ₁ of the magnetic tape 5.

Therefore, in two types of data cartridges having different tape widths of the magnetic tape 5, three rollers 7, 8 are used.
Must be replaced with belt winding surfaces 7a and 8a whose heights are different from each other.
There was a problem that the parts could not be standardized.

The present invention has been made in order to solve the above problems, and the magnetic tapes have different tape widths.
The purpose is to allow a pair of corner rollers to be commonly used for data cartridges of various types.

[0019]

SUMMARY OF THE INVENTION To achieve the above object, a day cartridge of the present invention comprises a cartridge constituted by a base plate and an upper cover, and a pair of rotatably supported inside the cartridge. A tape reel, one drive roller and a pair of corner rollers, a magnetic tape wound around the pair of tape reels, and a pair of drive units wound around the drive roller and the corner roller in a substantially T-shape. In a data cartridge including a drive belt driven by the drive roller in a state of being pressed against the outer circumference of the tape winding portion of the pair of tape reels, a substantially drum shape formed on the outer circumference of the pair of corner rollers. The center of the belt winding surface is arranged so as to deviate downward or upward with respect to the center position of these rollers in the vertical length direction, and By inverting the pair of corner rollers upside down for two types of data cartridges having different tape widths, the center of the belt winding surface of these rollers is made to coincide with the center of the magnetic tape having different tape widths. It is configured in.

[0020]

In the data cartridge of the present invention configured as described above, the center of the substantially drum-shaped belt winding surface formed on the outer periphery of the pair of corner rollers is set with respect to the center position of these corner rollers in the vertical length direction. The two types of data cartridges having different tape widths of the magnetic tape can be used by reversing and using a pair of corner rollers by inverting the pair of corner rollers. The center of the belt winding surface can be matched with the center of a magnetic tape having a different tape width.

[0021]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a data cartridge to which the present invention is applied will be described below with reference to FIGS. It should be noted that the same structural parts as those in FIGS.

[0022] First, by the FIG. 1 (A) (B), a pair of corner rollers when enlarged tape width of 1/4 inch from the tape width W ₁ of 8 millimeter tape width W ₂ of the magnetic tape 5 8 I will explain how to use upside down.

First, as shown in FIG. 1B, a conventional data cartridge (hereinafter referred to as a narrow tape cartridge B) in which the tape width W ₁ of the magnetic tape 5 is as small as 1/4 inch.
3 shows the height H ₁ of the center P ₁ of the magnetic tape 5 of FIG. In addition, as will be described later, FIG. 1A shows the center P ₂ of the magnetic tape 5 of the data cartridge (hereinafter referred to as tape cartridge A) in which the tape width W ₂ of the magnetic tape 5 is expanded to 8 mm. The height H ₂ is shown. At this time, since the height H ₃ of the lower flange 6b of the tape guide 6 is the same, H ₁ and H ₂ are H ₁ <H ₂ with reference to the lower edge 5c of the magnetic tape 5. The step between H ₁ and H ₂ is H ₄ . However, the dimensions C ₁ and C ₂ between the upper and lower flanges 6a and 6b of the tape guide 6 are dimensioned according to the tape widths W ₁ and W ₂ .

Next, in the corner roller 8 shown in FIGS. 1B and 1A, the same parts are turned upside down and the support shaft 1 is rotated.
0 is inserted into the outer periphery of 0 and is rotatably shown. The center P ₃ of the substantially drum-shaped belt winding surface 8a integrally formed on the outer periphery of the corner roller 8 is shown in FIGS.
In either case (A), the center P _{1 of} the magnetic tape 5 is
It matches P ₂ .

That is, for example, when the state of the corner roller 8 shown in FIG. 1B is in a normal posture, the center P ₃ of the belt winding surface 8a is the center position P _{4 of the} corner roller 8 in the vertical length direction. It is deviated downwardly by a step H ₅ . At this time, the step H ₅ is the center P of the magnetic tape 5.
It is set to 1/2 of the step difference H ₄ between ₁ and P ₂ .

Therefore, as shown in FIG. 1A, the tape width W ₂ of the magnetic tape 5 is increased from 1/4 inch to 8 millimeters, and the center P ₂ of the magnetic tape 5 is stepped H from P _1.
When moving upward by _4, the center P ₃ of the belt winding surface 8 a can be aligned with the center P ₂ of the magnetic tape 5 simply by turning the corner roller 8 upside down.

When the corner roller 8 is constructed as described above, the tape tape W has a tape width W ₁ of 1/4 inch, and the tape tape W has a width W ₂ of 8 mm. The same pair of corner rollers 8 can be commonly used for two types of data cartridges, a large tape cartridge A that uses the expanded magnetic tape 5, and the cost can be reduced by sharing the corner roller parts. You can

Next, referring to FIGS. 2 to 4, the magnetic tape 5 is expanded without increasing the outer diameter dimensions of the width X, the depth Y and the thickness Z of the cartridge 1 of the narrow tape cartridge B.
Expanding the tape width of 1/4 inch from the tape width W ₁ 8 mm in tape width W ₂ of, for explaining the data cartridge to be able to configure the substantial tape cartridge A.

This data cartridge is located on the lower surface 3d of the ceiling wall 3c of the upper cover 3 of the cartridge 1 and directly above the pair of left and right tape reels 4, one drive roller 7, and the pair of left and right corner rollers 8, respectively. Circular recesses 26, 27, 28 larger than the outer diameters of the two tape reels 4 and the three corner rollers 7, 8 are formed.

The upper flange 4 of both tape reels 4
c into the recesses 26, and the pivot 4c at the center upper part is moved to the bottom surface 2 of the recess 26 by the elasticity of the upper flange 4a.
6a is elastically pressed from below. In addition,
A positioning rib 23 is provided at the center of the bottom surface 26a of each recess 26.
Are integrally molded.

The large-diameter roller portion 7b at the upper end of the drive roller 7 and the upper ends of both corner rollers 8 are provided with three recesses 27,
The roller pressing rib 2 that is inserted into the center of the bottom surfaces 27a, 28a of the recesses 27, 28 and is integrally formed.
4, the bosses 7c, 8b of these three rollers 7, 8
The upper end of the shaft is pressed downward from the outer periphery of the support shaft 10.

As a result, the space height H between the base plate 2 in the cartridge 1 and the ceiling wall 3c of the upper cover 3 can be effectively utilized, and the thickness Z, width X and depth of the cartridge 1 can be effectively utilized. Even if Y is set to be exactly the same as the conventional _{one, the} drive that interferes with the dimension B ₁ between the upper and lower flanges 4a and 4b of both tape reels 4 that regulates the tape width W ₂ of the magnetic tape 5 and the upper edge 5b of the magnetic tape 5 The height dimension B ₂ of the large diameter roller portion 7b at the upper end of the roller 7 can be greatly increased.

As a result, according to this data cartridge, the tape width W ₂ of the magnetic tape 5 is changed from 1/4 inch to 8 inches.
It was possible to expand it to millimeters and use it as a single S, L type cartridge.

Then, the tape width W ₂ of the magnetic tape 5 is set to 1
By expanding from / 4 inch to 8 mm, the recording capacity could be expanded by about 1.25 times even if the magnetic tape 5 had the same tape length.

The embodiment of the present invention has been described above.
The present invention is not limited to the above embodiments, and various modifications can be made based on the technical idea of the present invention.

[0036]

The data cartridge of the present invention constructed as described above has the following effects.

The centers of the substantially drum-shaped belt winding surfaces formed on the outer circumferences of the pair of corner rollers are arranged so as to be displaced downward or upward with respect to the center positions of these corner rollers in the vertical length direction. By using a pair of corner rollers upside down for two types of data cartridges having different tape widths, the center of the belt winding surface of these corner rollers can be used as a magnetic tape having different tape widths. Since a pair of corner rollers can be commonly used for two types of data cartridges having different tape widths, the pair of corner rollers can be commonly used. Further, the cost can be reduced by sharing the parts of the pair of corner rollers.

[Brief description of drawings]

FIG. 1 is an A- of FIG. 4 for explaining how to vertically turn up and down a corner roller of a data cartridge that is an embodiment of the present invention.
It is a cross-section side view in the A arrow view.

FIG. 2 is a sectional side view taken along the line BB of FIG. 4 showing a data cartridge in which the tape width of the magnetic tape is expanded to 8 mm.

3 is a cross-sectional side view taken along the line CC of FIG.

FIG. 4 is a plan view of the above data cartridge.

FIG. 5 is a partially cutaway plan view of a conventional data cartridge.

FIG. 6 is an exploded perspective view of a conventional data cartridge.

FIG. 7 is a perspective view of a conventional data cartridge.

FIG. 8 is a sectional view taken along the line DD of FIG.

9 is a cross-sectional view taken along the line EE of FIG.

[Explanation of symbols]

1 cartridge 2 base plate 2b upper surface of base plate 3 upper cover 3c ceiling wall of upper cover 3d lower surface of ceiling wall of upper cover 4 tape reels 4a, 4b upper and lower flanges of tape reel 4c tape reel pivot 5 magnetic tape 5a of magnetic tape Tape winding portion 5b Magnetic tape upper edge 7 Driving roller 7a Driving roller belt winding surface 7b Large diameter roller portion of driving roller 8 Corner roller 8a Corner roller belt winding surface 9 Driving belt 9a Driving belt driving portion 10 Spindle A Large tape cartridge B Small width tape cartridge W ₁ 1/4 inch tape width of magnetic tape W ₂ 8 mm tape width of magnetic tape P ₃ Center of belt winding surface P ₄ Vertical direction of corner roller Center H ₄ Step between P ₁ and P ₂ Step between H ₅ P ₃ and P ₄

Claims (1)

[Claims] 1. A cartridge comprising a base plate and an upper cover, a pair of tape reels rotatably supported in the cartridge, a drive roller and a pair of corner rollers, and the pair of tape reels. In a state in which the magnetic tape wound around the tape is wound around the drive roller and the corner roller in a substantially T shape, and the pair of drive portions are pressed against the outer circumference of the tape winding portion of the pair of tape reels. In a data cartridge provided with a drive belt driven by the drive rollers, the center of the substantially drum-shaped belt winding surface formed on the outer periphery of the pair of corner rollers is set to the center position of these rollers in the vertical length direction. The magnetic tape is placed so as to be displaced downward or upward, and the pair of cores are used for two types of data cartridges having different magnetic tape widths. By reversing the upper and lower Narora, data cartridges the center with the belt winding surfaces of the rollers, characterized by being configured to match the center of the different magnetic tape of the tape width.