JPH0644730A - Flanged tape guide - Google Patents

Abstract

PURPOSE:To regulate a tape width with high accuracy by inserting a tape guide between upper and lower flanges from a direction perpendicular to an axial direction, thereby correcting the traveling width of the tape. CONSTITUTION:An upper flange 61 of a guide body 64 is previously inclined slightly in an arrow K direction with a horizontal reference P2 and the spacing L1 between the upper and lower flanges 61 and 62 is set slightly smaller than the overall length L2 of the tape guide 65. The guide 65 is inserted between the flanges 61 and 62 from the arrow A direction perpendicular to the axial direction thereof. The flange 61 is pushed upward in an arrow k' direction against elasticity up to a horizontal reference P2. The guide 65 is assembled with one operation to a body 64 by fitting recessed parts 21, 23 to projecting parts 22, 24. The position of the body 64 in the direction perpendicular to the axial direction of the guide 65 is then regulated by the recessed part 21 and the projecting part 22. The guide 65 is stoppered in turning by the recessed part 23 and the projecting part 24. The traveling width width (w) of the tape between the flanges 61 and 62 is corrected by both end faces 65a, 65b of the guide 65, by which the width (w) is regulated with high accuracy.

Description

Detailed Description of the Invention

[0001]

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

[0002]

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

A conventional data cartridge of this type is shown in FIG.
As shown in FIG. 3, the cartridge 1 is a lower box-shaped upper cover 3 which is an upper half formed of a synthetic resin having a light-transmitting property on a metal base plate 2 such as an aluminum plate which is a lower half.
It is formed by screwing. A pair of left and right tape reels 4 are rotatably supported on the base plate 2, 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 the front wall 3a of the upper cover 3 is guided.
It is hung along the inside of. A driving roller 7 and a pair of left and right corner rollers 8 are rotatably supported on the base plate 2 at substantially the central portion on the front edge side and both left and right corner portions on the rear edge side. The elastic drive belt 9 formed of a rubber belt or the like between the drive roller 7 and the both corner rollers 8 has a strong tension and is substantially T-shaped.
It is wrapped in a shape. And this drive belt 9
A pair of left and right driving portions 9a between the driving roller 7 and both corner rollers 8 are pressed against the outer circumferences of the pair of left and right tape winding portions 5a of the magnetic tape 5 wound around both tape reels 4.

The tape reels 4 and the three rollers 7 and 8 are rotatably pivoted by being inserted into the outer circumferences of a total of five support shafts 10 vertically planted on the base plate 2 by means of these center holes 11. The optical detecting mirror 12 at the tape end is attached inside the running path of the magnetic tape 5.

Next, when this data cartridge is mounted on the recording / reproducing apparatus, the notch 1 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 14 mounted between the base plate 2 and the upper cover 3 so as to open and close the opening 3 is opened in the direction of the arrow a as indicated by the alternate long and short dash line, and the magnetic head 15 on the recording / reproducing apparatus side is provided with the cutout 13. It is inserted in the direction of the arrow b and contacts the magnetic tape 5. At the same time, a motor roller 16 such as a rubber roller, which is rotatably driven by a motor (not shown) on the recording / reproducing apparatus side, is inserted into an opening 17 formed in the front wall 3a of the upper cover 3 in front of the drive roller 7 by an arrow. The motor roller 16 is inserted from the direction c and 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 16 and the drive belt 9 is rotationally driven in the direction of arrow e, both drive portions 9a pass through both tape winding portions 5a. The tape reel 4 is rotationally driven in the direction of arrow e, and the magnetic tape 5
Runs in the direction of arrow f at a high speed of 25 to 120 in / sec, and the magnetic head 15 causes C to be applied to the magnetic tape 5.
The PU data is recorded and reproduced.

[0006] By the way, the applicant of the present invention, the Japanese Patent Application No. 2-2
According to the prior applications such as Japanese Patent No. 37318 and Japanese Patent Application No. 2-410005, as shown in FIG. 6, the base plate 2 is composed of a resin plate formed of a synthetic resin such as polypropylene or polyacetal containing a reinforcing material such as glass fiber. However, it has been proposed that three tape guides 6 with flanges, a total of five support shafts 10, 11 and the like are integrally formed on the pace plate 2.

Therefore, the inventor of the present invention, as shown in FIG. 7, molds the flanged tape guide 6 with a synthetic resin, and uses vertical struts 63 between one side portions of a pair of upper and lower flanges 61, 62. The guide main body 64 is formed by connecting the guide main body 64 having a substantially U-shaped cross-section and the vertical tape guide 65 processed into a columnar shape with a metal such as stainless steel. A tape guide 65 was press-fitted from above into the circular holes 66 and 67 formed in the flanges 61 and 62 in the direction of arrow g to be attached.

[0008]

At this time, it is necessary to set the tape running width W between the upper and lower flanges 61 and 62 in FIG. 7 with high accuracy.
When the tape guide 65 was press-fitted into the two circular holes 66 and 67, the upper flange 61 was easily warped or deformed in the direction of the arrow k, and the tape running width W was apt to be distorted.

If the tape running width W becomes incorrect,
This causes a serious problem that the tape tension of the magnetic tape 5 in the data cartridge fluctuates, the magnetic head 15 is off-tracked, and the upper and lower edges of the magnetic tape 5 are damaged.

The present invention has been made to solve the above problems, and an object thereof is to provide a flanged tape guide which is easy to assemble and which can define the tape running width with high accuracy. There is.

[0011]

A flanged tape guide of the present invention for achieving the above object is formed of a synthetic resin, and has a substantially U-shaped cross section in which one side portion of the upper and lower flanges is connected by a column. -Shaped guide body, in the flanged tape guide consisting of the metal tape guide mounted between the upper and lower flanges, the tape guide is inserted by inserting between the upper and lower flanges from a direction perpendicular to the axial direction, The tape guide width between the upper and lower flanges is corrected by the axial end faces of the tape guide. At this time, by fitting a concave portion or a convex portion formed on at least one end surface in the axial direction of the tape guide into a convex portion or a concave portion formed on at least one opposing surface of the upper and lower flanges, an axial direction of the tape guide. A protrusion that can be retracted by a spring on at least one end surface of the tape, and the protrusion is fitted into a recess formed on at least one of the facing surfaces of the upper and lower flanges; and between the tape guide and the guide body. It is preferable that the formed engaging portions are engaged with each other in a direction perpendicular to the axial direction of the tape guide to prevent the tape guide from rotating.

[0012]

According to the flanged tape guide of the present invention having the above-described structure, the metal tape guide is inserted between the upper and lower flanges of the guide body made of synthetic resin from the direction perpendicular to the axial direction. The tape running width between the upper and lower flanges is corrected by the both end surfaces of the tape guide in the axial direction.

[0013]

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. Note that FIG.
The same structural parts as those in FIG. 7 are designated by the same reference numerals to avoid duplication of description.

First, FIGS. 1 and 2 show a first embodiment of the present invention, in which a pair of circular cylinders are formed at the center of both horizontal end surfaces 65a and 65b of a metal cylindrical column guide 65 in the axial direction P _1. Of the guide body 64 which is formed of a synthetic resin and which has the concave portions 21 of the upper and lower flanges 61 and 62 facing each other 61a, 62
A pair of circular convex portions 22 are integrally formed at the center of a, and a vertical groove-like concave portion 23 that is an engaging portion is formed on a part of the peripheral surface 65c of the tape guide 65. 63a
A rib-shaped convex portion 24 perpendicular to the is integrally formed.

The upper flange 61 of the guide body 64
Is preliminarily tilted in the direction of arrow k with respect to the horizontal reference P ₂ so that the distance L ₁ between the upper and lower flanges 61 and 62 is slightly smaller than the total length L ₂ of the tape guide 65.

Therefore, as shown in FIGS. 1 and 2B, the tape guide 65 is inserted between the upper and lower flanges 61 and 62 from the direction of arrow A which is a direction perpendicular to the axial direction P ₁ . , The upper flange 61 is pushed up to the horizontal reference P _{2 in the} direction of the arrow k ′ against the elasticity, so that the two convex portions 22
The tape guide 65 is assembled to the guide main body 64 with one touch by fitting the concave portion 23 and the convex portion 24 together.

Then, the both concave portions 21 and the both convex portions 22 cause the tape guide 65 to move in the axial direction P _{1 with} respect to the guide body 64.
The position of the tape guide 65 is fixed by the concave portion 23 and the convex portion 24.

Both end surfaces 65 of the tape guide 65
The tape running width W between the upper and lower flanges 61 and 62 is corrected by a and 65b, and the tape running width W is defined with high accuracy.

Next, FIG. 3A shows a second embodiment. In this case, both end surfaces 6 of the tape guide 65 are shown.
A pair of circular convex portions 22 are formed at the centers of 5a and 65b,
A pair of circular concave portions 21 are formed at the centers of the facing surfaces 61a and 61b of the upper and lower flanges 61 and 62, and these convex portions 22 and concave portions 21 are fitted to each other.

Next, FIG. 3B shows a third embodiment. In this case, the tape guide 65 is formed by a metal cylinder 65d whose both end surfaces 65a and 65b are closed. A disk 25 having a pair of upper and lower protrusions 22 and a compression coil spring 26 are housed in a metal cylinder 65d, and the compression coil spring 26 allows the pair of upper and lower protrusions 22 to move up and down from both end surfaces 65a and 65b of the tape guide 65. The convex portions 22 are fitted in the concave portions 21 of the upper and lower flanges 61 and 62.

In this case, the upper and lower flanges 61, 6
When the tape guide 65 is inserted between the two in the direction of the arrow A, the pair of upper and lower convex portions 22 are once dented against the compression coil spring 26 until they are flush with both end surfaces 65a and 65b. Since the convex portion 22 can be easily fitted into both concave portions 21 by the compression coil spring 26, the tape guide 65 can be easily assembled.

Next, FIG. 4 shows a fourth embodiment. In this case, a cut surface 27 cut parallel to the axial direction P ₁ is formed on a part of the peripheral surface 65c of the tape guide 65. Then, the cut surface 27 is brought into contact with the inner side surface 63a of the support column 63 directly from the direction of the arrow A to prevent the tape guide 65 from rotating, and the cut surface 27 and the inner side surface 63a are engaged with each other. It is composed of parts.

Although the embodiments of the present invention have 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. Further, the present invention is not limited to data cartridges, and can be applied to tape guides with flanges such as various tape cartridges.

[0024]

The flanged tape guide of the present invention constructed as described above has the following effects.

According to a first aspect of the present invention, a metal tape guide is inserted between the upper and lower flanges of the guide main body made of synthetic resin from a direction perpendicular to the axial direction of the guide main body, and both ends of the tape guide in the axial direction are attached. Since the tape running width between the upper and lower flanges is corrected by the surface, the tape width between the upper and lower flanges can be defined with high accuracy while the tape guide is easily assembled to the guide body.

Since the tape guide inserted between the upper and lower flanges can correct the forming error of the tape running width between the upper and lower flanges, the guide body having the upper and lower flanges can be easily molded with synthetic resin at a low cost. Can be realized.

According to a second aspect of the present invention, the concave portion or the convex portion formed on at least one end surface of the tape guide in the axial direction is fitted into the convex portion or the concave portion formed on at least one opposing surface of the upper and lower flanges. Therefore, the tape guide can be easily and accurately positioned with respect to the guide body.

According to a third aspect of the present invention, at least one end surface of the tape guide in the axial direction is provided with a convex portion which can be retracted and retracted by a spring, and the convex portion is fitted into a concave portion formed on at least one opposing surface of the pair of flanges. By doing so, the tape guide can be easily inserted between the upper and lower flanges.

According to a fourth aspect of the present invention, the engagement portion formed between the tape guide and the guide body is engaged with each other in a direction perpendicular to the axial direction of the tape guide, whereby the tape guide Since rotation is prevented, it is possible to prevent the inconvenience that the tape guide is unexpectedly rotated due to running friction of the magnetic tape.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional side view for explaining an assembly of a first embodiment of a flanged tape guide that is an embodiment of the present invention.

FIG. 2 is an exploded perspective view and a horizontal sectional plan view of the above-described first embodiment.

3A is a vertical sectional side view of the second embodiment, and FIG. 3B is a vertical sectional side view of the third embodiment.

FIG. 4 is an exploded perspective view and a horizontal sectional plan view of a fourth embodiment.

FIG. 5 is a partially cutaway plan view showing a data cartridge.

FIG. 6 is a perspective view showing a synthetic resin-molded base plate.

FIG. 7 is a perspective view and a vertical sectional side view illustrating a conventional tape guide with flange.

[Explanation of symbols]

 6 Tape guide with flange 61 Upper flange 61a Opposing surface of upper flange 62 Lower flange 62a Opposing surface of lower flange 63 Strut 63a Inner side surface (engaging portion) of strut 64 Guide body 65 Tape guide 65a, 65b Both end surfaces of tape guide 65c Circumferential surface of tape guide 21 Recessed portion 22 Convex portion 23 Recessed portion (engaging portion) 24 Convex portion (engaging portion) 26 Compression coil spring 27 Cut surface (engaging portion)

Claims (4)

[Claims] 1. A guide main body formed of synthetic resin and having a substantially U-shaped cross section in which one side portion of the upper and lower flanges are connected by struts, and a metal tape guide mounted between the upper and lower flanges. In the flanged tape guide, the tape guide is inserted by inserting it between the upper and lower flanges from a direction perpendicular to the axial direction, and the tape running width between the upper and lower flanges is corrected by both axial end surfaces of the tape guide. A tape guide with a flange characterized by being configured as described above. 2. A concave portion or a convex portion formed on at least one end surface of the tape guide in the axial direction is fitted in a convex portion or a concave portion formed on at least one opposing surface of the upper and lower flanges. The tape guide with a flange according to claim 1. 3. A taper guide is provided on at least one end surface of the tape guide in the axial direction by a spring, and the projection is fitted into a recess formed on at least one of the opposing surfaces of the upper and lower flanges. The tape guide with a flange according to claim 1, wherein 4. A detent for the tape guide is provided by engaging an engaging portion formed between the tape guide and the guide body with each other in a direction perpendicular to the axial direction of the tape guide. The tape guide with a flange according to claim 1, which is performed.