JPH08321156A - Disk cartridge - Google Patents

Abstract

PURPOSE: To obtain a disk cartridge in which the complicated mounting operation of a shutter plate and a spring can be saved by fitting and supporting the shutter mechanism of the shutter plate only from the case body side and performing cartridge assembling operation before a lid plate is mounted. CONSTITUTION: A U-shaped fitting part 24 is formed along a linear guide 25, with the end part of a shutter plate 21, a side plate 22, an upper plate 23, and linear guides 21a, 23a. In correspondence to it, a linear guide 20 is installed along the linear guide 25 on the bottom plate 1 of a case body A, a thick part 9 is formed in a region Aa, and a low thickness-stepped part 9a and a check plate 11 which can protrude so as to be fitted elastically are formed in a region Ab. Thereby, when the shutter plate 21 is mounted, it can be mounted on the body A side in the region Ab without the hindrance of the linear guide 23a, and it can be slid and moved getting over the check plate 11 so as to be fitted to and supported by the body. Thereby, before a lid plate B is mounted to cover the case body, a cartridge assembling operation can be performed, the complicatedness of the mounting of the shutter plate and a spring can be eliminated, and the efficiency of mounting work can be enhanced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disk cartridge used for recording / reproducing a character / image information recording disk such as a compact disk (CD).

[0002]

2. Description of the Related Art A conventional disc cartridge has a bottom plate 1 and four side wall plates 2, 2, 2, 2 as shown in the plan view of FIG.
A cartridge case main body A having an open upper part of a flat quadrangle and a head window D formed in the case main body A used for loading a recording / reproducing head of a disk drive in reading and writing the contents recorded on the disk. (A hole portion) and a shutter mechanism E by a movable shutter plate 21 that linearly slides with respect to the case body A to open and close the head window D and is normally biased in the closing direction. I have it.

Further, the case main body A is provided with a lid plate B (for example, a transparent plastic lid plate) for covering the upper opening and for storing and taking out the disc. The cover plate B is a single plate fixed to the case body A, or a two-part system of two plates divided on the case body A (one cover plate B is fixed to the case body A and fixed. The other cover plate B is openable / closable with respect to the case main body A via a hinge so that a disc can be stored and taken out.

By the way, the shutter plate 21 slides along a linear guide 25 provided on the outer surface of the side wall plate 2 of the case body A of the disk cartridge. A U-shaped fitting portion 24 (hold portion) for holding the side wall plate 2 side of the case main body A formed of the one end portion 21, the side plate 22, and the upper plate 23 is provided. .

Then, the fitting portion 2 of the shutter plate 21
One side wall plate 2 of the case body A held by
Above, the single lid plate B or the two-divided lid plate B
The cover plate B on one side is covered and is in a fixed state.

FIG. 5 is a sectional view taken along the line MM of FIG.
A linear guide groove 31 parallel to the linear guide 25 outside the side wall portion 2 (thickness portion 9) is provided on the inner surface of the covered fixed cover plate B, and the U-shaped guide groove 31 is provided in the guide groove 31. By fitting the guide follower 32 protrudingly provided on the upper side of the mold fitting portion 24, the shutter plate 21 linearly slides with respect to the case body A and the case body A
It has a structure that is fitted and supported so as not to come off.

Further, the shutter plate 21 in the conventional disk cartridge slides linearly to open and close the opening head window D, and normally has a spring F (for example, in the closing direction) so as to be in a closed state. The spring F is urged by a single coil spring or two or more consecutive coil springs as shown in the drawing, and the spring F has a hole in a bracket 10 whose one end is provided at a corner of the case body A as shown in FIG. The other end of the shutter plate 21 is provided in the installation portion 10a.
The brackets 26 are fitted in and supported by the holes 26a of the bracket 26, respectively.

[0008]

In the conventional disk cartridge described above, the shutter plate 21 is not attached to the case main body A by covering the case body A with the cover plate B having the groove 31 on the inner surface thereof and fixing the case. The structure is such that it does not come off from the main body A, while the spring F cannot be attached after the cover plate B is attached and fixed to the case main body A.

Therefore, when mounting the spring F in the conventional disc cartridge assembling work, first, the shutter plate 21 is supported by one hand so as not to come off from the case body A, while the other end portions of the spring F are supported on the other hand. The complicated work of attaching and supporting the bracket 10 of the case body A and the bracket 26 of the shutter plate 21 is required.

An object of the present invention is to perform a complicated work such as a conventional manual supporting operation of the shutter plate when the spring is attached by supporting the shutter mechanism by the shutter plate by slidingly fitting and supporting only the case body side. Is to be able to save labor.

[0011]

SUMMARY OF THE INVENTION The present invention is a case body A
A cover plate B that covers the upper opening of the case body A, a head window D formed in the bottom plate 1, and a head that is linearly slidable along the outer surface of the bottom plate 1 of the case body A. A shutter plate 21 for opening and closing the window D is provided, and the one end portion of the shutter plate 21 slidable along the linear guide 25, the side plate 22, and the upper plate 2 are provided.
3 is provided with a U-shaped fitting portion 24 and the linear guide 3 at the other end, and the thick portion 9 is provided in the region Aa along the linear guide 25 provided on the inner surface of the end of the bottom plate 1. An area Ab slightly wider than the width of the shutter plate 21 is provided with a wall thickness stepped portion 9a which is one step lower than the wall thickness portion 9, and the shutter plate 21 is movable along the linear guide 25 in the slide range Ev. It is characterized in that a non-return plate 11 having elasticity is provided on the region Ab side so as to project and fit into the surface of the thick stepped portion 9a which makes one end of the U-shaped fitting portion 24 stop contacting. Disc cartridge.

[0012]

1 is a plan view of the disk cartridge of the present invention, and FIG. 2 is an enlarged side sectional view taken along line LL of FIG.
According to the MM enlarged side cross-sectional view of (b) to (b), it will be described in detail below. A lid plate B that covers the upper opening of the case body A and a head window D that is provided in the bottom plate 1 are provided, and a linear slide that opens and closes a head window D that is flush with the outer surface of the bottom plate 1 is possible. The shutter plate 2 is provided with a shutter plate 21
1 is provided with a U-shaped fitting portion 24 formed by the one end portion, the side plate 22 and the upper plate 23, and is fitted to the outer surface of the bottom plate 1 of the case body A and the inner surface of the one end portion of the shutter plate 21, respectively. Linear guides 20 and 21a for guiding are provided, and on the inner surface of the bottom plate 1 of the case main body A, along the linear guide 25 from the mounting side of the spring F, in the area Aa, slightly wider than the width of the thick portion 9 and the shutter plate 21. The thick portion 9 is provided in the region Ab.
A lower wall thickness step portion 9a is provided, and linear guides 27 and 23a that are fitted and guided to the upper surface of the thick wall portion 9 and the inner surface of the upper plate 23 are provided. A check plate 11 is provided on the region Ab side of the thick stepped portion 9a, which can elastically project and fit into the surface of the thick stepped portion 9a that stops one end of the V-shaped fitting portion 24 from contacting. It is a disc cartridge.

1, 2 and 3 (a) to 3 (b), 1 is a quadrangular bottom plate, 2 is a side wall plate standing on four sides of the bottom plate 1, and A is the bottom plate 1 and the side wall plate. A cartridge case main body formed by 2, 2, 2, 2 and B is a cover plate which is applied from above the opening of the cartridge case main body A. As shown in FIG. 1, the cover plate B is, in one embodiment, of a two-divided type divided into upper and lower parts with a dividing line 13 (a line that divides the area of the case body into, for example, 1: 3) as a boundary. The cover plate B is a cover plate and is openable / closable at the upper part of the drawing with respect to the dividing line 13 in FIG. It can be opened and closed via. However, in order to simplify the drawing, a rotary hub (a center holder for axially supporting a rotary disc body such as a compact disc) provided in the central portion of an openable cover plate B for rotatably supporting the disc is not shown. .

In the disc cartridge of the present invention, the lid plate B is not limited to the two-division type lid plate shown in FIG. 1, but is a single undivided lid plate B. It may be openable and closable.

In FIG. 1, C is a circular disk storage portion for rotatably storing a disk such as a compact disk, and D is a disk storage portion C of the cartridge case body A.
It is a head window that is provided in the corresponding bottom plate 1,
E is a movable shutter mechanism capable of sliding the head window D on the outer surface (back surface) of the bottom plate 1 of the cartridge case body A.

As shown in the plan view of FIG. 1 and the LL enlarged side sectional view of FIG.
A case body A having a flat quadrangular upper portion including a bottom plate 1 and four side wall plates 2, 2, 2, 2 having an opening, a lid plate B for covering the upper portion of the case body A, and a case body A rotatable to the case body A. A disk storage portion C to be stored, a head window D formed in the bottom plate 1 corresponding to the storage portion C, a case body A or a linear guide on the inner surface of the cover plate that is slidable, and the head window D is outside. A shutter mechanism E that opens and closes further and a coil spring F that biases the shutter mechanism E in the closing direction are provided, and one end of the spring F has a case body A.
The shutter mechanism E has its other end attached and supported at one corner.

The shutter mechanism E is, as shown in the plan view of FIG. 1 and the MM enlarged side sectional view of FIGS.
A shutter plate 21 sized to close the opening portion of the window D and one end portion of the shutter plate 21 (the lower end portion of the shutter plate 21 shown in FIG. 1, the right end portion of the shutter plate 21 shown in FIGS. 3A and 3B). , A U-shaped fitting portion 24 including the one end portion, the side plate 22, and the upper plate 23.

One end of the shutter plate 21 is slidable in a U shape along a linear guide 25 (outer surface of the side wall plate 2) which is a flat guide formed on the outer surface of the side wall plate 2 of the case body A. Fitted and supported by the fitting portion 24,
On the rear surface side of the bottom plate 1, the window D is linearly slid in the horizontal direction of the drawing to open or close the window D.

In FIG. 1, reference numeral 3 denotes the linear guide 25 provided on the rear surface of the bottom plate 1 for fittingly supporting the upper end of the shutter plate 21 of the shutter mechanism E and guiding the upper end of the shutter mechanism E. It is a linear guide portion provided in parallel, and as shown in FIGS. 1 and 3, the other end portion 21b of the shutter plate 21 (the upper end portion of the shutter plate 21 in the drawing).
Are held from below the rear surface of the bottom plate 1 by a linear guide plate 3a provided on the rear surface of the bottom plate 1. In addition, in FIG. 1, 3c
Is a hole formed in the bottom plate 1 along the linear guide portion 3, and is formed by loading a molding die used for forming the linear guide plate 3a when forming the case body A. It is a holed part.

The shutter plate 21, which slides integrally with the upper plate 23, is shown in FIGS.
As shown in (L-L side sectional view), brackets 26 are provided at least at one location or at two locations facing each other in the vertical direction. The bracket 26 has coil portions 5, 7 at two locations as illustrated. Double coil spring F (or a single coil spring in which a coil is wound in one place, or an almost straight pin spring without a coil)
One end 8a of the U-shape (or U-shape) of the pin spring portion 8 is attached and fixed so as to fit into a hole (not shown) formed in the bracket 26. .

In addition, one corner of the case body A is shown in FIG.
The other L-shaped end portion 4a of the pin spring portion 4 of the double coil spring F is fitted into the hole portion 10a (see FIG. 2) of the bracket 10 provided at the inner end portion at the lower right end of the drawing. Installed on. Reference numeral 6 is an intermediate pin spring portion of the double coil spring F.

The holes 10a (see FIG. 2) of the bracket 10 on the case body A side for attaching and supporting both ends (L-shaped or U-shaped) of the spring F and the shutter plate 21 side. The hole 26a of the bracket 26 (see FIG. 5) may be a true circular hole in the case of an L-shaped end, but in the case of a U-shaped end, it may be in the LL direction in the drawing. Alternatively, it is suitable to have an elliptical hole, a long hole, or the like that is long in the MM direction.

In the disk cartridge of the present invention, as shown in FIGS. 1 and 2, the linear guide 25 which is a flat guide formed on the outer surface of the side wall plate 2 on the lower side of the case main body A in the drawing and the circular shape. Along with the inner surface of the end portion of the bottom plate 1 (upper surface of the end portion of the bottom plate 1),
A thick portion 9 having substantially the same height as the height (upper end) of the side wall plate 2 is provided over the region Aa. More specifically, the thick wall portion 9 has a part of the fitting portion 24 that is higher than the heights (upper ends) of the side wall plates 2 on both left and right sides of the drawing of the case main body A shown in FIG. It is as low as the thickness of the upper plate 23 that constitutes it.

The linear guide 2 is provided on the upper surface of the thick portion 9.
5, a groove-shaped linear guide 27 (or a protruding short rib-shaped guide follower or a long rib-shaped linear guide follower) is provided.

Further, as shown in FIGS. 1 and 2, the linear guide 25, which is a flat guide, is formed on the outer surface of the side wall plate 2 on the lower side of the drawing of the case body A, and the circular disk storage portion C. In between, the linear protruding along the inner surface of the end portion of the bottom plate 1 (the upper surface of the end portion of the bottom plate 1), for example, over the region Ab, to the inner surface of the U-shaped fitting portion 24 described later. Lower than the upper surface of the thick portion 9 into which the guide 23a is fitted (for example, slightly lower than the protruding height of the guide 23a, or lower than the protruding height of the guide 23a, or A wall thickness step portion 9a is provided, which is lower than the height corresponding to the height by adding the clearance of the guide), thereby forming a space portion G ₁ into which the guide 23a can be fitted, and forming a space G _{1 in the} area Ab. The width is a sly of the shutter plate 21. It is slightly wider set than in the direction of width.

In the present invention, the thick stepped portion 9a formed over the area Ab is not shown as another embodiment, but only the corresponding portion of the guide 23a, which will be described later, in the range of the area Ab. Alternatively, the space portion G ₁ may be partially provided within the range of the region Ab.

Further, as shown in FIGS. 2 and 3 (a),
On the outer surface of the bottom plate 1 corresponding to the lower part of the thick portion 9 in the region Aa, in parallel with the linear guide 27, the groove-shaped linear guide 20 (or a short rib-shaped guide follower provided in a protruding manner,
Alternatively, a long rib-shaped linear guide follower) is provided. The linear guide 20 and the linear guide 27
In the drawing, on the back side and the front side of the bottom plate 1, they are arranged so as to face each other at a position substantially facing each other or at a position slightly deviated from each other.

As shown in FIG. 2, the outer surface of the bottom plate 1 corresponding to the lower part of the wall thickness step portion 9a in the region Ab is
Notch surface 1a that is flush with the bottom surface of the groove of the linear guide 20
Is provided.

As another embodiment, the groove-shaped linear guide 20 is formed without forming the notch surface 1a in the area Ab.
May be provided on the outer surface of the bottom plate 1 corresponding to the lower portion of the thick portion 9 and the lower portion of the thick step portion 9a over the regions Aa and Ab.

The groove-shaped linear guide 20 (or the short rib-shaped guide follower or the long rib-shaped linear guide follower provided on the outer surface of the bottom plate 1 over the area Aa) is shown in FIG. As shown in FIG.
A guide follower 21a (or a linear guide groove) protruding from the inner surface is fitted and supported, and the follower 21a slides along the linear guide 20.

Further, the groove-shaped linear guide 27 (or the short rib-shaped guide follower or the long rib-shaped linear guide follower provided on the upper surface of the thick portion 9) is shown in FIG. ~ (B), the shutter plate 2
A linear guide 23a having a short rib shape or a long rib shape projectingly provided on the inner surface of the upper plate 23 in the U-shaped fitting portion 24 of FIG.
(Guide follower or linear guide groove) is fitted and supported, and the guide 23 a slides along the linear guide 27. The short rib-shaped guide 23a
Is suitably provided at one or two places as shown in the figure, but may be provided at more places.

Incidentally, FIG. 3 (a) shows an embodiment of the present invention. The linear guides 27 that linearly guide the movement of the linear guides 23a are provided on both sides in the width direction orthogonal to the movement direction. It is a notched guide 27 in which the inner upper surface of the thick portion 9 is notched only on one side along the linear guide direction, and the guide 23a slides while being guided by one vertical side surface of the guide 27. That is, the guide 23a
In contrast to the case body A, the thick portion 9 only in the outer direction (one side)
It is a guide 27 having an L-shaped cross section, which is provided with a guide bank portion (one side sliding side surface).

FIG. 3B shows another embodiment of the present invention. The linear guide 27 that linearly guides the movement of the guide 23a (guide follower) is orthogonal to the moving direction. Concave cross section or cross section U provided with guide bank portions (both sliding side surfaces) by the thick portion 9 on both sides in the width direction
The guide 23a is a groove-shaped guide 27. The guide 23a is fitted into the groove-shaped guide 27, and is slid while being guided by one vertical side surface of the guide 27. In addition, in the present invention, the linear guide 27 is not limited to this.

In addition, the U-shaped fitting portion 24 of the shutter plate 21 in the present invention shown in FIGS.
For example, as shown in FIG. 3 (b), one end of the bottom plate 1 and the linear guide 2 are arranged along the linear guide 25.
The linear guide 20 with the outer corners of 5 cut out,
From the area Aa to the area Ab, or the area Aa
A linear guide 21a is provided which extends from an intermediate region to a region Ab of the U-shaped fitting portion 24 and projects to an inner corner of the shutter plate 21 and the side plate 22. You may make it guide the guide 21a.

Thus, the shutter plate 21 and the side plate 2
The shutter mechanism E having the fitting portion 24 including the upper plate 23 and the upper plate 23 is slidable by being fitted to the outer surface of the bottom plate 1 of the case body A and the inner surface of the shutter plate 21. Linear guides 20 and 21a, and linear guides 27 and 23 provided on the thick portion 9 of the case body A and on the inner surface of the upper plate 23, which are fitted and slidable relative to each other
With a, while holding the shutter plate 21 in parallel, it is possible to linearly slide between the ranges Ev as shown in FIG.

As shown in FIG. 1, a spring F is attached to one end of the fitting portion 24 attached to the case main body A, and the shutter plate 2 is moved within the sliding movement range Ev.
1 is always elastically biased from the area Aa in the Ab direction.

At the other end of the fitting portion 24 in the disc cartridge of the present invention, as shown in FIGS. 1 and 2, a reverse portion which can be elastically projected and fitted to the surface of the thick stepped portion 9a. The shutter plate 21 is provided with a stop plate 11, and a sliding range Ev attached to the case body A is urged by a spring F to slide by the protruding end of the check plate 11 facing the fitting portion 24. The one end of the U-shaped fitting portion 24 can be stopped by abutting.

The non-return plate 11 is composed of a bottom plate 1 of the case body A in the region Ab and an inclined part 11a raised obliquely upward from the thick step part 9a above the flat part 11b. The leading end of the shutter is opposed to and abuts against the end of the upper plate 23 of the fitting portion 24, and stops the shutter plate 21 biased by the spring F against the biasing force of the spring F.

The inclined portion 11a is a plate-shaped portion that can be integrally molded with the plastic case body A by the same molding material, and its thickness should be set to an appropriate thinness. Provides elasticity in the direction of the arrow as shown.

In addition to this, the non-return plate 11 is constructed by omitting the flat portion 11b and only by the inclined portion 11a, and the tip portion of the inclined portion 11a has the end portion of the upper plate 23 of the fitting portion 24. You may make it contact | abut with.

The disk cartridge of the present invention has the U-shaped fitting portion 24 of the shutter plate 21 shown in FIG.
The elastic inclined portion 11a of the check plate 11 is replaced with the thick step portion 9
While pushing down in the a-plane direction, it is fitted into the space portion G ₁ (or the space portions G ₁ and G ₂ ) provided in the region Ab.

Subsequently, the fitting portion 24 is slid along the linear guide 25 of the wall thickness step portion 9a in the direction of the area Aa, so that the inner surface of the upper plate 23 of the fitting portion 24 is moved as shown in FIG.
The sliding portion 11a slides along the inclined portion 11a of the non-return plate 11 shown in FIG. 2 and eventually gets over the tip of the flat portion 11b (or the inclined portion 11a). At that time, the inclined portion 11a is more than the thick stepped portion 9a. After protruding and returning to the original state, the upper plate 23 of the fitting portion 24 is prevented from returning in the opposite direction (direction of the region Ab) by the tip portion of the flat portion 11b (or the inclined portion 11a).

On the other hand, at the same time, when the fitting portion 24 is slid along the linear guide 25 of the thick step portion 9a in the direction of the area Aa, it is fitted as shown in FIG. 3 (a) or 3 (b). The guide 23a on the inner surface of the joint portion 24 and the linear guide 27 of the case body A, and the linear guide 20 on the outer end portion of the bottom plate 1 of the case body A and the guide 21a on the inner surface of the end portion of the shutter plate 21 are fitted together to form a shutter. The plate 21 is slidably attached to the outer surface of the bottom plate 1 on the rear surface of the case body A, and thereafter or before that, the both ends 4a and 8a of the spring F are connected to the brackets 10 at the corners of the case body A. It is attached to the bracket 26 of the fitting portion 24.

Each of the parts (the case body A including the disk storage portion C, the cover plate B, and the shutter mechanism E) constituting the above-described disk cartridge of the present invention is formed by plastic molding using a mold. However, the elastic check plate 11 capable of projecting / retracting from the upper plate 23 constituting the shirt mechanism E or the wall surface 9a of the case body A by such plastic molding.
1 is formed at the time of forming the linear guide 23a (guide follower) projecting on the inner surface of the upper plate 23 or the check plate 11 projecting on the surface of the wall thickness step 9a. As shown in FIG. 2, the bottom plate 1 and the meat are opened along the one end of the guide 23 a along the upper plate 23 by an opening 28 (undercut part for loading the receiving mold) by the mold, or along the tip of the check plate 11. You may make it the opening part 12 by a metal mold | die be formed in the thickness step part 9a. In addition, the protruding guide 23
When a is provided in the inner direction of the case body A with respect to the opening 28, a better molding strength can be obtained.

The case body A used in the disc cartridge of the present invention is a transparent or opaque plastic case, the cover plate B is a transparent or partially transparent plate, and the cover plate B is on the case body A. Coated on
The bottom plate 1 and the cover plate B of the case body A may be integrally attached to each other by fitting taps and tap holes formed in the vertical direction on the inner surface of the bottom plate 1 or the inner surface of the lid plate B, or may be attached by an adhesive, a screw, or the like. Further, the lid plate B may be either a single lid plate B which is not divided or a lid plate B which is divided into two and opened and closed by the hinge 12.

Further, the disk cartridge of the present invention,
A known disk cartridge structure can be adopted without departing from the scope of the present invention. For example, the tip of the check plate 11 protruding to the thick step 9a and the bottom plate 1 of the case body A can be adopted. The spring F of the shutter plate 21 urges the shutter plate 21 at two positions, one of which is a recess A ₁ (not shown) in which the shutter plate 21 slides and moves, which is formed in the slide movement region of the shutter plate 21 on the outer surface (lower surface). You may make it stop contact | abut the edge part of a direction.

As described above, in the disk cartridge of the present invention, the linear guides 20 are fitted and guided to the outer surface of the bottom plate 1 and the inner surface of the shutter plate 21 of the case body A, respectively.
21a is provided on the inner surface of the end of the bottom plate 1 of the case body A.
Along the linear guide 25 from the mounting side of the spring F, a thick portion 9 is provided in the area Aa, and a step portion 9a having a thickness one step lower than the thick portion 9 is provided in an area Ab slightly wider than the width of the shutter plate 21. Are provided on the upper surface of the thick portion 9 and the inner surface of the upper plate 23 so as to fit and guide each other.
23a is provided, and as shown in FIG. 2, a space portion G ₁ is formed above the linear guide 25 in the region Ab.

One end of the shutter plate 21 and the side plate 22
And an upper plate 23 and has a guide 23a inside.
When the linear guide 25 is fitted in the protruding fitting portion 24 of the area Ab and the shutter plate 21 is mounted on the case body A side, the protruding guide 23a is fixed to the space portion G. _The fitting part 2 does not interfere with the mounting by ₁
4, the linear guide 25 can be smoothly fitted therein, and subsequently, the fitting portion 24 is slidably moved along the linear guide 25 in the direction of the thick portion 9 of the area Aa, whereby the fitting portion 24
The linear guides 21a and 23a of the linear guides 20 and 2
7, the shutter plate 21 is fitted and supported so as not to come off from the case main body A.

Therefore, in the attaching operation of the spring F before covering and fixing the cover plate B on the case body A, the spring F is attached while supporting the shutter plate 21 by hand so as not to come off from the case body A side. The shutter plate 21 is slidably moved along the linear guide 25 while the shutter plate 21 is fitted and supported, so that both ends of the spring F are attached to the bracket 10 of the case body A and the shutter plate 21. The bracket 26 and the bracket 26 are smoothly attached. The space G ₁ is required by the side wall plate B ₂ which is formed vertically as an end of the cover plate B as a part of the cover plate B when the cover plate B is applied to the opening of the case body A later. Is blocked accordingly.

Further, by providing the notch 1a on the outer surface (lower surface) of the bottom plate 1 corresponding to the lower portion of the thick stepped portion 9a in the region Ab, as shown in FIG. 2, the linear guide 2 in the region Ab is provided.
5 a space G ₂ is formed on the lower side, and a linear guide 25 is formed in the fitting portion 24 of the shutter plate 21 in the region Ab.
When the shutter plate 21 is mounted on the case body A side by fitting the linear guide 2 projecting on the inner surface of the fitting portion 24
1a is fitted in the space G ₂ without any hindrance, and the linear guide 25 is smoothly fitted in the fitting portion 24.

As described above, in the disc cartridge of the present invention, it is not necessary to fit and support the shutter plate 21 of the shutter mechanism E to the cover plate B as in the conventional case, and the cover plate B is not yet attached and fixed. However, the shutter plate 21 is fitted and supported so as not to come off from the case body A.

[0052]

The disc cartridge of the present invention is provided with a non-return plate 11 which can elastically project and fit into the surface of the thick step portion 9a.
Is provided on the region Ab side of the thick stepped portion 9a, and the elastic check plate 11 capable of projecting / fitting allows the U-shaped fitting portion 24 of the shutter plate 21 to move within the slide movement range Ev. Since one end portion of the shutter plate 21 can be abutted and stopped, the U-shaped fitting portion 24 of the shutter plate 21 is formed in the thick step portion 9a.
At the time of fitting, the non-return plate 11 projecting from the thick stepped portion 9a surface can be pushed down so as to fit in the thick stepped portion 9a surface direction against its elasticity. The upper plate 23 of the fitting portion 24 of the shutter plate 21,
Alternatively, the upper plate 23 and the shutter plate 21 may be provided in the area A
space portion G ₁ (or space portions G ₁ and G ₂ provided in b)
The fitting portion 24 can be fitted into the thick stepped portion 9a by fitting the fitting portion 24 inside.

Subsequently, the fitting portion 2 fitted to the thick step portion 9a
4 is slid in the area Aa direction along the linear guide 25 of the wall thickness stepped portion 9a, whereby the fitting portion 24
While pushing down the check plate 11 by the inner surface of the upper plate 23, it slides with respect to the check plate 11 and eventually gets over the tip of the check plate 11, at which point the check plate 11 Due to the elasticity, it projects from the surface of the thick stepped portion 9a to restore the original state, and the upper plate 23 of the fitting portion 24 is moved in the reverse direction (direction of the region Ab) by the tip portion of the check plate 11 facing the upper plate 23. ) Can be prevented from returning to.

Further, in the disk cartridge of the present invention, a non-return plate 11 having elasticity that can be projected / fitted into the surface of the thick step portion 9a is provided from the region Ab to the surface of the thick step portion 9a. By providing so as to incline toward the area Aa with a high inclination, the U-shaped fitting portion 24 of the shutter plate 21 is slid after being fitted to the thick stepped portion 9a, and the check plate. When the tip end of 11 is crossed over, the inner surface of the upper plate 23 of the fitting portion 24 can be smoothly slid along the inclined surface of the check plate 11 (for example, the inclined portion 11a) that is inclined.

[0055]

According to the disk cartridge of the present invention, the shutter plate of the shutter mechanism is fitted and supported by the conventional cover plate in the assembling work of the cartridge before the cover plate is covered and attached and fixed to the case body. Since there is no need, the shutter plate can be fitted and supported so that it will not come off from the case body even when the cover plate is not yet attached and fixed, and the shutter plate and both ends of the spring are attached during the cartridge assembly work. As described above, the complexity of the shutter mechanism installation work can be eliminated, and it is effective in improving the efficiency of the cartridge assembly work.

[Brief description of drawings]

FIG. 1 is an overall plan view of an embodiment of a disc cartridge of the present invention.

FIG. 2 is a sectional view taken along line L-L in an embodiment of the disc cartridge of the present invention.

FIG. 3A is a sectional view taken along the line MM of an embodiment of the disc cartridge of the present invention, and FIG. 3B is a sectional view taken along the line MM of the disc cartridge of the present invention according to another embodiment.

FIG. 4 is an overall plan view of a conventional disc cartridge.

FIG. 5 is a sectional view of a conventional disc cartridge taken along the line MM.

[Explanation of symbols]

A… Case body A ₁ … Shutter slide recess B…
Cover plate B ₁ ... Projection part B ₂ ... Side wall plate C ... Disk storage part D ... Head window E ... Shutter mechanism Ev ... Sliding movement range of shutter mechanism E F ... Spring 1 ... Bottom plate 2 ... Side wall plate 3 ... Linear guide part 3a ... Guide plate 3c ... Hole portion 4 ... Pin spring portion 4a ... Spring end portion 5 ... Coil spring portion
6 ... Intermediate pin spring part 7 ... Coil spring part 8 ... Pin spring part 8a ... Spring end part
9 ... Thick portion 9a ... Thick step portion 10 ... Bracket 10a ... Hole portion 11 ... Check plate 11a ... Inclined portion 11b ... Flat portion 12 ... Opening portion by molding 20 ... Linear guide 21 ... Shutter plate 21a ... Linear Guide 21b ... The other end of the shutter plate 22 ... Side plate 23 ... Upper plate 23a ... Linear guide 24 ... Fitting portion 25 ... Linear guide 26 ... Bracket 26a ... Hole portion 27 ... Linear guide 28 ... Molding opening 31 ... linear guide grooves 32 ... projecting guide portion Aa ... areas of the region Ab ... thick stepped portion of the thick portion G ₁ ... space G ₂ ... space

Claims (3)

[Claims] 1. A case main body A, a cover plate B for covering the upper opening of the case main body A, a head window D formed in the bottom plate 1, and an outer surface of the bottom plate 1 of the case main body A. A shutter plate 21 that opens and closes a linearly slidable head window D is provided flush with one end of the shutter plate 21, which is slidable along a linear guide 25, a side plate 22 and an upper plate 23. The bottom plate 1 is provided with a V-shaped fitting portion 24 and a linear guide 3 at the other end.
Along the linear guide 25 provided on the inner surface of the end, the area Aa
Is provided with a thick portion 9 and a thickness step portion 9a which is one step lower than the thick portion 9 in a region Ab slightly wider than the width of the shutter plate 21, and moves in the slide range Ev along the linear guide 25. An elastic non-return plate 1 capable of projecting / fitting into the surface of the thick stepped portion 9a which makes one end of the U-shaped fitting portion 24 of the shutter plate 21 that can be stopped contact.
1. A disk cartridge, wherein 1 is provided on the area Ab side. 2. The disk cartridge according to claim 1, wherein a cutout portion 1a is provided on an outer surface of the bottom plate 1 in a portion corresponding to a lower portion of the wall thickness step portion 9a in the area Ab. 3. A non-return plate 11 capable of elastically projecting and fitting,
3. The disk cartridge according to claim 1, wherein the disk cartridge protrudes with a high inclination in the direction of the area Aa with respect to the surface of the thick step portion 9a.