JPH04181580A - Tape cartridge - Google Patents

Abstract

PURPOSE:To reduce machining man-hour, assembly man-hour and cost by forming a base plate and a plurality of supporting axles of a tape cartridge in one piece with synthetic resin. CONSTITUTION:A plurality of supporting axles 22-25 and a tape guide pin 26 are formed in one piece by synthetic resin on a base plate 21, thus enabling machining man-hour and assembly man hour of the supporting axles 22-25 and the pin 26 to be totally reduced and cost of a cartridge to be reduced. A metal film 28 such as chrome plating is formed on an outer-periphery surface of the supporting axles 22-25 and the pin 26 and an entire upper and lower surfaces of a base plate 21.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention provides a tape cartridge that is most suitable for application to a data cartridge for recording CPtJ data at high density, for example, and in particular, the base plate is made of synthetic resin. This relates to antistatic structures such as rollers and the like.

[Summary of the invention]

The present invention stores a tape wound on a pair of tape reels in a cartridge constituted by a base plate and an upper cover, and winds a belt between a plurality of rollers rotatably mounted on the base plate. and press the belt against the outer periphery of the tape winding portion of the pair of tape reels,
In the tape cartridge configured such that the tape reel is rotationally driven by the belt through the tape winding section, a plurality of spindles for rotatably supporting the plurality of rollers, etc. are mounted on the base plate using synthetic resin. By integrally molding and applying surface treatment such as chrome plating to the upper surface of the base plate on the outer periphery of these support shafts, the base plate can be made of synthetic resin and the wear resistance of the base plate and multiple support shafts can be improved. It is designed to make it possible to achieve the following.

[Conventional technology]

For example, Japanese Patent Publication No. 14976/1983 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 screwing a thin box-shaped upper cover 3, which is an upper half, onto a base plate 2, which is a metal plate 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 molded from a transparent synthetic resin. A pair of left and right tape reels 4 are rotatably mounted on the base plate 2.
A magnetic tape 5, which is a tape, is wound around both reels 4. This magnetic tape 5 is the base plate 2
The hook is guided by a pair of left and right tape guides 6 attached to the front wall 3b, and is passed along the rear side of the front wall 3b. Further, a belt drive roller 7 and a pair of left and right belt guide rollers 8 are rotatably supported on the base plate 2 at approximately the central portion on the front side and at both left and right end portions on the rear side.

An elastic belt 9 is wound around the belt drive roller 7 and both belt 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 shown by a dashed line, and the magnetic head 12 on the recording/reproducing apparatus side is inserted into the notch lO 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 winding surface 7a of the belt drive roller 7. It is crimped onto the outer periphery of 7b. When the belt driving roller 7 is rotationally driven in the direction of the arrow C by the driving roller 13 and the belt 9 is rotationally driven in the direction of the arrow C, the belt 9 is driven to rotate in the direction of the arrow C.
Both tape reels 4 are connected via both tape winding portions 5a.
is rotationally driven in the direction of arrow d, and the magnetic tape 5 is run at a relatively high speed of 25 to 120 inches/sec in the direction of arrow e, and recording and reproduction of the magnetic tape 5 is performed by the magnetic helad 12.

Conventionally, as shown in FIG. 8, a plurality of support shafts made of metal such as stainless steel rotatably support a pair of tape reels 4 and three rollers 7.8 on a base plate 2 made of metal such as an aluminum plate. 15 is implanted by press-fitting, and a pair of tape reels 4 and three rollers 7.8 molded from synthetic resin are rotatably inserted into the outer periphery of each support shaft 15 through these center holes 16. A belt 9 made of synthetic resin was wrapped around the belt 9, and the center hole 16 was filled with grease 17.

[Problem to be solved by the invention]

However, the conventional structure in which a plurality of support shafts 15 are press-fitted onto the metal base plate 2 has a problem in that component costs and processing costs are extremely high.

Conventionally, the rollers 7.8 and the base plate 2 were insulated by the grease 17, so in particular, in an automatic disk cartridge assembly machine, the belt 9 was driven at high speed to insulate the inside of the cartridge 1. When winding the magnetic tape 5 at high speed, a large amount of static electricity was likely to build up between the rollers 7.8 and the belt 9 due to friction between the rollers 7.8 and the belt 9. When a data cartridge charged with static electricity is used in a dry atmosphere, discharge occurs after the charge increases to a value that causes the magnetic tape to 5.
There was a problem that caused a serious accident in which the data recorded on the device was destroyed.

SUMMARY OF THE INVENTION An object of the present invention is to provide a tape cartridge in which the base plate is made of synthetic resin and the amount of charge on a plurality of rollers can be reduced.

[Means to solve the problem]

In order to achieve the above object, the tape cartridge of the present invention has the base plate molded from synthetic resin, and a plurality of support shafts rotatably supporting at least the plurality of rollers, which are mounted on the base plate. A metal coating is formed on the upper surface of the base plate, which is in contact with at least the outer circumferential surface of the spindle and the lower end surface of at least the plurality of rollers rotatably attached to the outer circumference of the spindle.

[Effect]

In the tape cartridge configured as described above, the base plate and the plurality of support shafts are integrally molded from synthetic resin, so that the base plate is made of synthetic resin. And yet,
A plurality of rollers rotatably supported on the outer periphery of a plurality of support shafts can be rotated by contacting the metal coating.

〔Example〕

Hereinafter, one embodiment of a data cartridge to which the present invention is applied will be described with reference to FIGS. 1 to 6.

Note that the same structural parts as in the conventional example shown in FIGS. 7 and 8 are given the same reference numerals, and redundant explanation will be omitted.

First, making the base plate 21 from synthetic resin will be explained with reference to FIGS. 1A to 2.

First, the base plate 21 is injection molded from a synthetic resin such as polypropylene or polyacetal containing a reinforcing material such as glass fiber. supporting shaft 22
, a pair of support shafts 23 that rotatably support a pair of tape guides 6, and a total of three support shafts 2 that rotatably support one belt drive roller 7 and a pair of belt guide rollers 8.
4, a support shaft 25 that rotatably supports the opening/closing door 11, a plurality of tape guide pins 26, etc. are vertically integrally molded.

The upper cover 3 is injection molded from a transparent synthetic resin such as acrylic, and on the lower surface of the upper wall 3a is a pivot 4a at the upper center of a pair of tape reels 4.
A ring-shaped bearing 27 into which the upper ends of the three support shafts 24 are fitted is integrally molded.

According to the data cartridge configured as above,
Multiple support shafts 22.23.24.2 on base Fj2.21
Since the base plate 21 is made of synthetic resin by integrally molding the tape guide pin 26 and the tape guide pin 26, a plurality of support shafts 22, 23, 24, 25,
The man-hours for processing and assembling the tape guide bin 26 can be completely reduced, and the cost of the data cartridge can be significantly reduced.

Then, the tape reel 4, tape guide 6, roller 7.8, and opening/closing [11] are rotatably inserted and attached to the outer peripheries of the plurality of support shafts 22, 23, 24, and 25 through these center holes 16, and the roller 7 After a belt 9 is wound between the two parts, the base plate 21 and the upper cover 3 are joined together by screws or the like to form the cartridge 1.

Note that each center hole 16 is filled with grease 17.

By the way, in this data cartridge, as shown in FIGS. 1A to 1C, the plurality of support shafts 22 to 25, the outer peripheral surface of the tape guide bin 26, and the upper and lower surfaces 21 of the base plate 21
A metal coating 28, such as chrome plating, is formed on the entire surfaces of the parts a and 21b.

Therefore, the tape reel 4, tape guide 6, roller 7.
8 and the center hole 16 of the opening/closing door 11 has a plurality of support shafts 22 and 23.
．． 24 and 25 are rotated in contact with the metal coating 28 on the outer periphery thereof. Further, the tape reel 4, tape guide 6, roller 7.8, and lower end surface 29 of the opening/closing door 11 are covered with metal on the upper surface 21a of the base plate 21. l! 2B, the wear resistance of the base plate 21 and the plurality of support shafts 22, 23, 24 and 25 made of synthetic resin can be improved. Further, since the outer peripheries of the plurality of tape guide pins 26 that guide the magnetic tape 5 are also formed with a metal coating 28, the wear resistance of these tape guide pins 26 can also be improved.

In particular, since the tape reel 4, tape guide 6, and roller 7.8 are electrically grounded to the metal coating 28, the amount of static electricity on these tape reel 4, tape guide 6, and roller 7.8 can be reduced. This makes it possible to prevent static electricity from being discharged, etc.

Furthermore, the metal coating 28 formed on the base plate 21 can improve the rigidity and appearance of the base plate 21 molded from synthetic resin.

Next, a modification of this data cartridge will be explained.

In the modification shown in FIG. 3, a metal coating 28 such as chrome plating is formed on the upper surface 21a of the base plate 21, the plurality of support shafts 22, 23, 24, 25, and the outer peripheral surfaces of the tape guide pin 26. .

The modification shown in FIGS. 4 and 5 has a plurality of support shafts 22.2.
3.24.25 and the outer peripheral surface of the tape guide bin 26,
A metal coating 28 such as chrome plating is formed on the upper surface 21a of the base plate 21, which is in contact with the tape reel 4, the tape guide 6, the roller 7.8, and the lower end surface 29 of the opening/closing door 11.

In the modification shown in FIG. 6, the upper surface 21a of the base plate 21 is
The metal coatings 28 are interconnected on the upper surface 21a by connection lines 28a made of similar metal coatings 28.

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.

〔Effect of the invention〕

Since the present invention is configured as described above, it produces the effects described below.

By integrally molding the base plate and multiple support shafts from synthetic resin, we were able to use synthetic resin for the base plate, which significantly reduced the number of processing and assembly steps, resulting in a significant cost reduction for tape cartridges. can be achieved.

Although the base plate was made of synthetic resin, it was possible to rotate the rollers rotatably supported around the outer periphery of multiple spindles by contacting the metal coating. The wear resistance of the base plate and the support shaft can be improved.

Since the plurality of rollers can be electrically grounded to the metal coating, the amount of static electricity on the plurality of rollers can be reduced.

By forming a metal coating on the base plate, the rigidity and appearance of the base plate molded from synthetic resin can be improved.

[Brief explanation of drawings]

1A to 6 show an embodiment of the present invention, and FIG. 1A, FIG. 1B, and FIG. 2 is an exploded perspective view showing the entire base plate, FIG. 3 is a sectional view of a modified example, FIG. 4 is a plan view of a modified example, and FIG. is a sectional view taken along the line DD in FIG. 4, and FIG. 6 is a plan view of a modified example. Figure 7 is a partially cutaway plan view of the entire data cartridge.
FIG. 8 is a sectional view taken along the line E--E in FIG. 7, showing a conventional base plate and a support shaft. In addition, in the symbols used in the drawings, 1-...--
・−・−−−−One cartridge 3−・・・・−−−−
−−・−・・−Top cover (upper half) 4−・・・・−・
・−・−・−・・・・Tape reel 5・−・−・・・・
−・−・−Magnetic tape (tape) 7・・−・・−・−−
−−−−・・−・Belt drive roller 8・−−−−1−・・−・・−=−Belt guide roller 9−・−・−・・
−・・−・〜Belt 21・・−・・−・・−・−・−Base plates 22, 23.
24.25 ・−・−・−１−−−−−−−−・−Spindle 28−・−・
−111−−−−・−Metal coating 29−・・・・−
---1.- This is the lower end surface.

Claims (1)

[Claims] A tape wound around a pair of tape reels is stored in a cartridge constituted by a base plate and an upper cover, and a belt is placed between a plurality of rollers rotatably mounted on the base plate. The tape cartridge is configured such that the belt is brought into pressure contact with the outer periphery of the tape winding portions of the pair of tape reels, and the tape reel is rotationally driven by the belt via the tape winding portions, A base plate is molded from synthetic resin, and a plurality of spindles that rotatably support at least the plurality of rollers are integrally molded on the base plate, and at least the outer peripheral surface of the spindle and the outer circumference of these spindles rotate. A tape cartridge characterized in that a metal coating is formed on the upper surface of the base plate, which is in contact with the lower end surfaces of at least the plurality of freely attached rollers.