JPH04134775A - Tape cartridge - Google Patents

Abstract

PURPOSE:To reduce working man-hour and assembling man-hour and to stabilize tape running by integrally molding a tape guide with a frange by a synthetic resin to at least one of the upper and lower half. CONSTITUTION:Three tape guides 17 with a frange are formed by integrally molding an upper and lower pair of franges 17b, 17c which are planar shape that are U-shaped, rectangular-shaped, or polygon-shaped, etc., and are horizontal, at both the upper and lower end of a guide pin 17a which is an approximately U-shaped horizontal sectional shape and is perpendicular to a base plate 16 at a prescribed height H1, H2. And the guide pin 17a of the tape guide 17 with the frange at the center is set at right angles to the front edge 16a of the base plate 16, and the guide pin 17a of the tape guides 17b, 17c with the frange, at both the left and right side, are set at an angle of theta3, theta4 in the opposite direction to each other to the front edge 16a of the base plate 16. Thus, the working man-hour and the assembling man-hour are reduced, and the tape running is stabilized.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention provides a tape cartridge that is most suitable for application to, for example, a data cartridge for recording CPU data, and is particularly suitable for cartridge synthesis [Summary of the Invention] The present invention provides a tape cartridge in which a tape is housed in a cartridge constituted by upper and lower halves, and in which the tape is guided by a tape guide with a flange disposed between the upper and lower halves. By integrally molding the attached tape guide from synthetic resin, it is possible to achieve both a significant reduction in processing and assembly man-hours and stabilization of tape running.

[Conventional technology]

For example, Japanese Patent Laid-Open No. 15517/1983 is known as a data cartridge for recording CPU data at high density.

This type of data cartridge, as shown in FIG.
The cartridge 1 is formed by fixing a thin box-shaped upper cover 3, which is an upper half, onto a base plate 2, which is a metal such as an aluminum plate, which is a lower half. Moreover, the cover 3 has a horizontal top wall 3a, a vertical front wall 3b, a rear wall 3C, and left and right side walls 3d, which are integrally injection molded from a transparent synthetic resin. A pair of left and right tape reels 4 are rotatably supported on the base plate 2, and a magnetic chip 15, which is a tape, is wound around both tape reels 4. The magnetic tape 5 is guided by a plurality of flanged tape guides 6 attached along the front edge of the base plate 2, and is stretched along the rear side of the front wall 3b. Further, a heald drive roller 7 and a pair of left and right heald x inner rollers 8 are rotatably supported on the base plate 2 at approximately the center on the front side and at both right and left ends on the rear side. An elastic belt 9 is wound around the belt drive roller 7 and both heald guide rollers 8 with strong tension in a substantially T-shape. A portion of this belt 9 is in pressure contact with the outer periphery of a pair of tape winding portions 5a of the magnetic tape 5 wound around both tape reels 4.

Next, when this data cartridge is installed in the recording/reproducing device, the base plate 2 is opened and closed so as to open and close the notch 10 formed at one end of the front side of the base plate 2 and the upper cover 3.
and an opening/closing door 11 rotatably attached between the top cover 3
is opened in the direction of arrow a as indicated by a dashed line, and the magnetic head 12 on the recording/reproducing device side is inserted into the notch 10 and comes into contact with the magnetic tape 5. At the same time, the drive roller 13 on the side of the recording/reproducing device is inserted into the opening 14 provided in the upper cover 3, and the large diameter roller portion is integrally formed on the upper part of the belt wrapping surface 7a of the heald drive roller 7. It is crimped onto the outer periphery of 7b. When the belt drive roller 7 is rotationally driven by the drive roller 13 in the direction indicated by the arrow C, and the heald 9 is driven in the direction indicated by the arrow C, the belt 9 winds both tape reels through both tape winding portions 5a. 4 is rotationally driven in the direction of arrow d, and the magnetic tape 5 is guided by a plurality of flanged tape guides 6 and rotated in the direction of arrow e.
The magnetic tape 5 is run at a relatively high speed of 5 to 120 inches/sec, and high-density recording and reproduction are performed on the magnetic tape 5 by the magnetic tape 12.

By the way, this type of data cartridge uses a thick aluminum plate as the base plate 2 because the base plate 2 serves as a height reference plate for the magnetic tape 5 with respect to the magnetic head 12 when it is installed in a recording/reproducing device. Flat metal plates such as are used.

On the other hand, as shown in FIG. 10, the plurality of flanged tape guides 6 have disc-shaped flanges 6b and 6C integrally formed at the upper and lower ends of a cylindrical guide pin 6a, respectively, and at the bottom of the lower flange 6C. The press-fit shaft 6 is integrally formed and is machined from metal such as stainless steel. and,
These flanged tape guides 6 are press-fitted and implanted into the base 12 from above using a press-fitting shaft 6d at the lower end.

[Problem to be solved by the invention]

However, in the conventional manufacturing method of press-fitting and planting a plurality of flanged tape guides 6 cut from metal onto a metal base plate 2, the number of man-hours for processing and assembling the flanged tape guides 6 is extremely large. In many cases, the costs are significantly higher. Furthermore, when press-fitting the press-fitting shaft 6d of the flanged tape guide 6 into the base plate 2 from above, the flanged tape guide 6 may be tilted θ as shown at the left end of FIG. As shown in FIG. 10, variations in height +H are likely to occur due to insufficient press-fitting of the flanged tape guide 6, and variations in height H are likely to occur due to excessive press-fitting of the flanged tape guide 6, as shown at the right end of FIG. Ta.

When the flanged tape guide 6 has a tilt or a variation in height, a change occurs in the running direction and running height of the magnetic tape 5, and the magnetic head 1, which performs high-density recording and playback,
There are problems in that the direction and height of the magnetic tape 5 relative to the magnetic tape 2 change, which tends to cause off-trunk, and the magnetic tape 5 is also easily damaged.

SUMMARY OF THE INVENTION An object of the present invention is to provide a tape cartridge that can achieve both a significant reduction in processing and assembly man-hours and stabilization of tape running.

[Means to solve the problem]

In order to achieve the above object, the tape cartridge of the present invention is such that at least one of the upper and lower halves of the cartridge is molded from synthetic resin, and a flanged tape guide is integrally molded on the one half.

[Effect]

In the tape cartridge configured as described above, the flanged tape guide is integrally molded with synthetic resin on one half of the upper and lower halves, so the processing time required for cutting the flanged tape guide out of metal and the flanged tape guide are reduced. It is possible to reduce the assembly man-hours required for press-fitting and planting in the half. Since the flanged tape guide is integrally molded onto one half of the synthetic resin, it is possible to prevent inclination and height variations of the flanged tape guide by molding precision.

〔Example〕

An embodiment in which the present invention is applied to a data cartridge will be described below with reference to FIGS. 1 to 8.

Note that the same structural parts as those of the conventional example shown in FIG. 9 and FIG.

First, as shown in FIG. 6, the upper cover 3 is conventionally injection molded from a transparent synthetic resin such as acrylic resin.

The base plate 16, which was conventionally formed of a metal plate such as an aluminum plate, is injection molded from a synthetic resin such as polypropylene or polyacetal containing a reinforcing material such as glass fiber. A plurality of three (or two) flanged tape guides 17 are vertically integrally molded along 16a. Also, base plate 2
On the top, a pair of reel shafts 18 that rotatably support a pair of tape reels 4, and a total of three roller shafts 19 that rotatably support one belt drive roller 7 and a pair of belt guide rollers 8, An opening/closing door shaft 20 that rotatably supports the opening/closing door 11, a plurality of tape guide pins 21, etc. are vertically integrally molded. Incidentally, the base plate 16 and the upper cover 3 are coupled together by screws or the like in a conventional manner to constitute the cartridge 1.

Next, as shown in FIGS. 1 to 5, each of the three flanged tape guides 17 has a substantially U-shaped horizontal cross section and is at a right angle θ to the base plate 16.

At the upper and lower ends of the vertical guide pin 17a, a pair of upper and lower horizontal flanges 17b and 17C, each having a U-shaped, square, or polygonal planar shape, are attached at a predetermined height H+, Hz with respect to the base plate 16. It is integrally molded.

In FIGS. 1 and 2, the guide pin 17a of the central flanged tape guide 17 is connected to the front edge 1 of the base plate 16.
The guide pins 17a of the left and right flanged tape guides 17b and 17C are set at angles θ3 and θ4 in opposite directions with respect to the front edge 16a of the base plate 16.

In addition, the perpendicularity (right angle θ,) of the guide pins 17a of the three flanged tape guides 17 to the base plate 16 and the accuracy of the heights H, Hl of the pair of upper and lower flanges 17b and 17C are determined by injection molding using a mold described later. It can be easily and highly accurately ensured by molding precision during molding.

Therefore, as shown in FIGS. 1 and 2, the magnetic tape 5
When the magnetic tape 5 is guided by the three flanged tape guides 17 and travels, the magnetic tape 5 can be wound around the circumferential surface of the guide pin 17a of the flanged tape guides 17 on both the left and right sides at an acute angle. There is no deviation in the perpendicularity (right angle θ1) of the guide pins 17a of the three flanged tape guides 17 to the base plate 16, and there is no variation in the precision of the heights Hl and Hl of the pair of upper and lower flanges 17b and 17c, so the magnetic The running of the tape 5 can be stabilized and damage to the magnetic tape 5 can be prevented.

Next, an example of an injection molding method using a mold for the flanged tape guide 17 will be described with reference to FIGS. 7 and 8.

Guide pin 1 of flanged tape guide 17 in mold release direction
A base plate cavity 26 and a slide core 25 whose sliding direction is a direction Y perpendicular to the axial direction X of the guide pin 17a are provided between the upper mold 24 and the lower mold 25 whose sliding direction is the axial direction Cavity 2 for tape guide with flange
7.

Then, the molten synthetic resin 29 is injected from the injection gate 28 opened in the cavity 27 of the upper mold 23, and the flanged tape guide 17 and the base plate 16 are integrally injection molded.

Therefore, the three flanged tape guides 17 are simultaneously integrally molded onto the base plate 16 using the three slide cores 25. In addition, each reel shaft 17, roller shaft 19, opening/closing door mounting shaft 20, and tape guide bin 21 are connected to an upper mold 23,
They are integrally molded onto the base plate 16 using only the lower mold 24 at the same time.

Although the embodiments of the present invention have been described above, the present invention is not limited to the above embodiments, and various effective changes can be made based on the technical idea of the present invention.

Further, the present invention is not limited to data cartridges, but can be applied to various tape cartridges.

(Effects of the Invention) Since the present invention is configured as described above, it produces the following effects.

By integrally molding the flanged tape guide with synthetic resin on one half of the upper and lower halves, it is possible to make that half of the synthetic resin, and the number of man-hours required for cutting the flanged tape guide out of metal is reduced. Since the number of assembly steps for press-fitting and implanting the tape guide into the half can be reduced, manufacturing is extremely easy and costs can be significantly reduced.

The flanged tape guide is integrally molded into one half of synthetic resin, and the inclination and height variations of the flanged tape guide can be prevented by molding precision, so the flanged tape guide There is no inclination or variation in height, etc., and it is possible to stabilize the running of the tape guided by the flanged tape guide and to prevent damage to the tape.

[Brief explanation of drawings]

Figures 1 to 8 show an embodiment of the present invention, in which Figure 1 is a front view of the main part, Figure 2 is a plan view of the main part, and Figure 3 is the same as that of Figure 2. 4 is an enlarged cross-sectional view taken along arrow A-A, FIG. 4 is a cross-sectional view taken along arrow B-B in FIG. 3, and FIG.
6 is an exploded perspective view showing the whole, and 7 is a cross-sectional view in the direction of arrows.
The figure is a cross-sectional side view showing the molding die, and Figure 8 is D of Figure 7.
- It is a sectional view in the D arrow direction. FIG. 9 is a partially cutaway plan view of a conventional example, and FIG. 10 is a front view of a conventional flanged tape guide. In addition, in the codes used in the drawings, substitute cartridge upper cover (upper half) magnetic tape (tape) base plate flange tape guide upper mold lower mold slide core fused synthetic resin Hitoshi Ueya

Claims (1)

[Scope of Claims] A tape cartridge in which a tape is stored in a cartridge constituted by upper and lower halves, and the tape is guided by a flanged tape guide disposed between the upper and lower halves, wherein at least one of the upper and lower halves is 1. A tape cartridge, characterized in that it is molded from synthetic resin, and the flanged tape guide is integrally molded on one half of the tape cartridge.