JPH1092137A - Disk cartridge - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a disk cartridge which can prevent a trouble that a shutter is not closed or the like even when a torsion coiled spring is moved on a peripheral wall part in its opening and shutting operation so as to come into contact with sidewalls at an upper half and a lower half by a method wherein a sliding rail at a slider with which the bent part of the torsion coiled spring is crossed is formed to be of a special structure and the bent part at the arm of the torsion coiled spring can be bent and stretched smoothly without being hooked. SOLUTION: A shutter 25 is attached, via a slider 17, to an upper half and a lower half at a cartridge body 11. One end of a torsion coiled spring 19 is coupled to the slider 17, and the other end of the coiled spring 19 is coupled to the body 11. The lower end part of a slider rear-surface sliding rib 29 is finished to be a taper shape or a chamfered shape, and it is formed as a slope 21 for guiding a bent part. Thereby, even when a bent part A at the arm part of the torsion coiled spring 19 comes into contact with the lower end part of the slider rear-surface sliding rib 29, it is moved along the taper shape or the chamfered shape of the lower end part, and it can be bent and stretched without being hooked.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cartridge with a shutter for storing a recording medium such as an optical disk or a magnetic disk.

[0002]

2. Description of the Related Art Generally, a magnetic disk and an optical disk
It is housed in a disk cartridge consisting of both halves. At the center of the cartridge, a turntable insertion hole for inserting a disk rotation turntable is provided, and a head insertion hole (opening) for inserting a read / write head across the recording surface of the disk is provided. I have.

Further, a shutter for closing the opening is attached to the cartridge body so as to prevent foreign matter dust from entering through the opening. The shutter has a closing surface capable of closing an opening provided in the cartridge main body, and is slidably provided on the cartridge main body via a slider provided along a sliding projection of the cartridge main body.

The shutter is urged by a torsion coil spring material in a direction in which the opening of the cartridge body is closed by the closing surface. When the shutter is not used, the opening is held closed, and the shutter is mounted on the disk drive. When the shutter is released, the shutter release mechanism on the drive device side pushes the shutter open against the urging force of the spring material so that the opening faces the outside.

[0005]

However, the mounting structure of the torsion coil spring includes a structure in which the torsion coil spring is simply inserted between the slider and the cartridge wall, a structure in which the spring is prevented from coming off, and the like. However, in either case, the spring is mounted in a state where it is simply engaged, and when the opening and closing operation of the shutter is performed rapidly or is frequently repeated by an autochanger or the like, the torsion spring is used. The slider slides on the lower side of the guide sliding part of the side wall when it shakes in the direction crossing the bending and stretching direction and contacts the side walls of the upper and lower halves, or acts from the shutter fully open to the closing direction. The bending part of the arm of the torsion spring is caught on the lower side of the torsion spring, causing troubles such as the shutter not closing.

If the drive device is inserted with the shutter not closed, there is a problem that the drive device is not inserted to a normal position, thereby causing a malfunction of the drive device. Therefore, the present invention provides a structure capable of preventing a trouble such as a shutter not closing even when a torsion spring moves on a peripheral wall portion during opening / closing operation and comes into contact with side walls of upper and lower halves.

[0007]

The inventors of the present invention have made intensive studies to solve the above-mentioned problems of the disk cartridge, and as a result, have made the sliding rail of the slider crossed by the bending portion of the torsion coil spring to have a special structure. As a result, the bending portion of the arm of the torsion coil spring can be smoothly bent and stretched without being caught, and the above problems have been solved, and the present invention has been completed.

That is, the gist of the present invention consists of a slider attached to a slide rail provided along the side of the cartridge body, an opening / closing shutter provided on the slider, and a spring for urging the slider. The spring comprises a coil portion wound with an elastic wire and two arms extending from the coil portion, at least one of the arms has a bending portion, and the bending portion opens and closes a slider and a shutter. In a disc cartridge having a structure crossing the vicinity of the sliding rail in accordance with the above, a slant surface for bending portion guide is provided at a position crossing the bending portion of the spring of the sliding rail.

An example of the disk cartridge of the present invention will be described below with reference to the drawings. 1 to 3 are plan views of essential parts of a disk cartridge according to the present invention with one surface removed, FIG. 4 is a perspective view of a spring, FIG. 5 is a partially enlarged perspective view of a conventional sliding rail, and FIG. 7 and 8 are perspective views showing the structure of the sliding rail portion in the cartridge of the present invention.

In the figure, 11 is a cartridge body, 12 is an upper half, 13 is a lower half, 17 is a slider, 23 is a slot portion, and 25 is a shutter. The disk cartridge main body 11 includes a synthetic resin cartridge case including an upper half 12 and a lower half 13, a shutter 25 integrally attached to the slider 17, and a disk-shaped recording medium such as an optical disk rotatably housed in the case. It is mainly composed of media.

As shown in an exploded view in FIG. 1, the disk cartridge has a structure in which an upper half 12 and a lower half 13 each having a substantially flat plate shape and a rectangular shape are brought into contact with each other and are united by means such as screwing. Cartridge body 1
A disk-shaped recording medium, for example, an optical disk, is rotatably housed in 1.

The upper half 12 and the lower half 13 of the cartridge body 11 are made of, for example, injection molding using a synthetic resin material such as a polycarbonate resin or an ABS resin. Are combined to form a rectangular structure in which the length of one side is slightly larger than the diameter of the optical disc. Chucking mechanism insertion openings (turntable insertion holes) 12a and 13a are formed in substantially the center portions of the cartridge halves 12 and 13 so that the chucking hub of the storage disk 1 is exposed. From the insertion openings 12a and 13a to the front edge of the cartridge, rectangular magnetic head device openings (head insertion holes) 12b and 13b are formed in which a part of the disk is exposed and the recording / reproducing head is movable. .

A shutter 25 is mounted on the upper half 12 and the lower half 13 of the cartridge body 11 via a slider 17. This shutter 25
Are for opening and closing the chucking mechanism insertion openings 12a and 13a and the magnetic head device openings 12b and 13b. The shutter 25 is formed, for example, by bending a metal plate such as a stainless steel plate. As shown in the drawing, a shutter plate portion 14 that closes the opening 12b and the insertion opening 12a on the upper half 12 side, and a shutter plate portion 14 that closes the lower half 13 Opening 13b of
And a shutter plate portion 15 for closing the insertion opening 13a, and a connecting portion 16 for connecting these.

The shutter plates 14, 15 and the connecting portion 16 are bent at right angles so that the shutter plate 14 and the shutter plate 15 are spaced apart from each other at a predetermined interval, that is, an interval corresponding to the thickness of the cartridge body 11. Are confronted in parallel. As described above, the shutter plates 14 and 15 are provided with the opening 12 b on the upper half 12 side and the insertion portion 1.
2a or opening 13b on the lower half 13 side and insertion portion 13a
Have a rectangular shape so that each can be closed.

The connecting portion 16 connects the shutter plate portion 14 and the shutter plate portion 15, but also serves to attach the entire shutter to the slider 17. The slider 17 is provided on the side of the cartridge body 11,
That is, the cartridge halves 12, 13 are provided between the front edges along the lateral direction. The shutter 25 can be stably slid by sliding on the cartridge body 11 via the slider 17. The shutter 25 is screwed to the connecting portion 16 by a screw 20 or the like.
7 may be fixed. The slider 17 is moved between the front edges of the halves 12 and 13 of the cartridge body 11 by sliding projections 18.
(The guide sliding portion), and slides the slider 17 along the sliding convex portion 18 so that the shutter plate 1
Open and close 4,15. One end of a torsion coil spring 19 is fixed to the slider 17, and the other end of the spring 19 is locked to the cartridge body 11. The spring 19 may be locked to the shutter 25.

The slider 17 is formed in a substantially columnar shape, and is provided with a guide engaging groove 22 which engages with a sliding convex portion (guide sliding portion) 18 of the cartridge body 11 in the longitudinal direction of the side surface. The torsion coil spring 19 is made of an elastic wire as shown in FIG. 4, and has a central coil portion 19a and two arms 19b and 19c extending from the coil portion to both sides. The arm has a bent portion A, and bent ends 19d and 19e bent in a direction intersecting the bending direction of the torsion coil spring 19 are formed at the ends as shown in FIG.

The two bent ends 19 of the torsion coil spring 19
Reference numerals d and 19e are attached to the peripheral wall portion 30 of the disk cartridge and the slider 17 or the shutter 25. Thus, when the shutter 25 is closed or opened, the torsion coil spring 16 bends and expands. Then, the bending portion A of the torsion coil spring 19 crosses near (in front of) the sliding rail.

However, since the spring is fixed only to the extent that both ends of the spring are engaged with the groove, and the play is large,
If the shutter is opened and closed rapidly or the shutter is frequently opened and closed by an automatic change or the like, the torsion coil spring shifts in a direction intersecting the bending and stretching direction and moves on the side walls of the upper and lower halves. At this time, as shown in FIG. 6, the bending portion A of the arm portion 19b of the torsion coil spring is hooked on the lower side of the slider lower sliding rib 29 provided below the guide sliding portion 18, and the shutter is opened. It will not close. If the disk drive is inserted in this state, the shutter will not be completely opened, and therefore, the disk drive will malfunction.

In the present invention, as shown in FIGS. 7 and 8, the lower end of the slider lower surface sliding rib 29 is tapered or chamfered to form a bent portion guiding inclined surface 21 so that the torsion coil spring 19 is formed. Even if the bent portion A of the arm portion 19b contacts the lower end portion of the slider lower surface sliding rib 29, the lower end portion moves along a chamfer or a tapered shape, so that it can bend and extend without being caught. .

[0020]

According to the present invention, when the shutter is opened and closed rapidly or an impact is applied to the disk cartridge, the bent end of the torsion coil spring is brought into contact with the lower end of the projection of the lower rib of the guide rail due to the force applied. Even if it comes into contact, it operates without being caught because it is tapered or chamfered.

[Brief description of the drawings]

FIG. 1 is a plan view of a main part of a cartridge of the present invention.

FIG. 2 is a plan view of a main part of the cartridge of the present invention.

FIG. 3 is a plan view of a main part of the cartridge of the present invention.

FIG. 4 is a perspective view of a spring.

FIG. 5 is an enlarged perspective view of a conventional sliding rail.

FIG. 6 is a longitudinal sectional view showing a conventional spring portion.

FIG. 7 is a perspective view of a sliding rail portion of the cartridge of the present invention.

FIG. 8 is a perspective view of a sliding rail portion of the cartridge of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Cartridge main body 17 Slider 19 Spring 21 Refraction part guide inclined surface 25 Shutter 29 Sliding rib

Claims (1)

[Claims] 1. A disc cartridge comprising a slider attached to a slide rail provided along a side of a cartridge body, an opening / closing shutter provided on the slider, and a spring for urging the slider. The spring includes a coil portion around which an elastic wire is wound, and two arms extending from the coil portion. At least one of the arms has a bending portion, and the bending portion slides along with opening and closing of a slider and a shutter. A disk cartridge having a structure crossing the vicinity of a sliding rail, wherein a slant surface for bending portion guide is provided at a position crossing the bending portion of the spring of the slide rail.