JP2003068044A - Disk cartridge - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a disk cartridge in which dust-proof property is improved by reducing the sliding area of a shutter member and a case. SOLUTION: A disk cartridge 10 is equipped with a shutter member 42 for opening/closing an opening 22 provided on a case 14 for housing a disk-shaped medium 12 so as to be rotatable. The shutter member 42 is bellows-shaped while alternately foldably linking a plurality of bellows plates 42A, and by making an operating member 50 (one terminal) close to or away from a fixing part 44 (the other terminal) fixed on the case 14, the opening 22 is opened/closed so that the sliding part of the case 14 and the shutter member 42 is only a linking part 42B and a shutter abutting plane 24 around the opening 22. Besides, the sliding part is closed with the shutter member 42 in a closing state of the opening 22 so that no dust is stuck.

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention
Disc-shaped disc media used as recording / reproducing media
A disk that holds the door in a rotatable manner and prevents intrusion of dust, etc.
Related to the cartridge. [0002] For example, for portable computers
Recording / reproducing media such as optical disks and magneto-optical disks
Disc-shaped disc media are used. like this
When recording or playing back disc media,
To the recording surface while rotating while loaded in the drive device
By irradiating with laser light,
Information is recorded by pit formation, phase change, magnetization, etc.
Or based on differences in laser light reflectivity and polarization angle
The recorded information is played back. In addition, recording of such disc media
To increase capacity,
Supports high recording density (track width and track pitch)
To reduce the spot diameter of the laser beam irradiated onto the recording surface.
In order to reduce the wavelength of laser light (for example, blue-violet laser
Use) and high NA (open) of the objective lens that focuses the laser beam
Number) or a combination of these has been proposed. In this way, the spot diameter of the laser beam is reduced.
Then, a cover layer that protects the recording surface of the disc media
Suppresses the attenuation of the laser beam and the focal length (with objective lens
The cover layer to reduce the distance to the recording surface)
It is necessary to reduce the thickness. Reduce the thickness of the cover layer
And the diameter of the laser beam on the surface of the cover layer is small.
In other words, the influence of dust on the surface of the cover layer cannot be ignored.
Become. For this reason, the disk media is placed in the case.
Storing to prevent dust from adhering to the disk media
A disk cartridge is used. Such a de
The disk cartridge will be described with reference to FIG.
The FIG. 8 shows a disk cartridge 200.
Has been. The disc cartridge 200 is made of resin.
The disc-shaped disc media 202 can be rotated.
Case 204 and the center of the disk medium 202
The center hole 202A provided on the recording area and the recording surface (the
(Bar layer) in order to expose part of 202B to the outside
The opening 206 provided in the tube 204 and a cross-section “U” shape
Formed on the outer surface (upper and lower surfaces) of the case 204
Open by sliding along the shallow sliding groove 204A
And a shutter member 208 that opens and closes 206
Has been. In this disk cartridge 200, a data cartridge is
When the disc media 202 is not used, it is shown in FIG.
The opening 206 is closed by the shutter member 208 as shown.
Intrusion of dust into the case 204 (ie,
I.e., dust and the like on the disk media 202)
It is the structure to do. On the other hand, the disk medium 202 is used.
The case 204 (disk cartridge 200)
Is loaded into the drive device and used to open and close the drive device.
Therefore, the shutter member 208 is in the sliding groove 2 of the case 204.
It moves while sliding with 04A to open the opening 206. As a result, as shown in FIG.
The disk media 202 can be accessed. sand
That is, the center hole portion 202 of the disk medium 202
A holding by the rotating spindle shaft of A and the recording surface 202B
Recording / reproducing head (laser head that irradiates laser light
Etc.) is possible. However, this is not the case.
In such a conventional disk cartridge 200, the opening 20
When opening and closing 6, the shutter member 208 is placed in the case 204.
The sliding groove 204A slides along with the sliding groove.
Wear powder is generated, and wear powder enters the case 204 from the opening 206.
There was a case of intrusion. In particular, the shutter member 208 is
In the configuration made of a metal material, the shutter member 208
Therefore, the resin case 204 is easily worn and wear powder
Generation amount and intrusion amount increase. Also, storage of the disk cartridge 200
Sometimes dust adhering to the sliding groove 204A opens the opening 206.
Along with the movement of the shutter member 208 accompanying the closing, the opening 20
6 may enter the case 204. Thus, the wear that has entered the case 204
Powder or dust may form on the surface of the disk medium 202 (recording surface 20
2B to protect or re-record
It causes a missing raw signal (so-called dropout). You
That is, the conventional disk cartridge 20 as described above.
In 0, the laser light has a shorter wavelength or the objective lens
It was difficult to ensure dustproofness corresponding to high NA. In consideration of the above fact, the present invention provides a shutter.
-The sliding area between the member and the case is small, improving dust resistance.
The purpose is to obtain a disc cartridge. [0014] In order to achieve the above object,
The disc cartridge according to the invention described in claim 1 is,
Case that contains disc-shaped disc media in a rotatable manner
And provided in the case to access the disk media.
The access opening and multiple plate-like members are folded alternately.
Foldable connected and one end in the folding direction
The other end is fixed to the case
And a shutter member that opens and closes the opening.
The In the disk cartridge according to claim 1,
Are connected so that a plurality of plate-like members can be folded alternately.
Shaft (formed in a bellows shape) with one end fixed to the case
The other end of the utter member is in contact with or separated from the one end.
Disc media installed on one or both sides of the case.
The opening to access the door is opened and closed. That is, when the disk medium is not used.
The other end of the shutter member is a case (for example, an opening
Adjacent plates separated from one end fixed in the vicinity of the edge)
In a state where the angle of inclination of the member is large
Preferably, a plurality of plate-like members each form an opening
This shutter member closes the opening in a state along the surface)
To do. This prevents dust from entering the case.
The On the other hand, when using disk media
Is one end where the other end of the shutter member is fixed to the case
Moved to the side and approached, the shutter member was folded
State (Each plate-like member is folded alternately and is approximately stacked in the thickness direction.
In the layered state), the opening is opened. This opens
Access to disc media from the mouth is possible,
For example, if the rotating spindle shaft of the drive
The recording / reproducing head etc. enters while rotating the disk media.
Record information on the recording surface of the disk media
The information recorded in is reproduced. Here, the shutter member is a plurality of plate-like members.
Are connected to each other in a foldable manner and fixed to the case
When the other end is in contact with or separated from one end in the folding direction
Since the opening is opened and closed, the sliding area with the case is small. You
That is, for example, the shutter member is the opening forming surface of the case.
In the configuration that closes the opening by abutting (surface around the opening),
The shutter member is connected to and separated from one end and the other end
In the connection part of each plate-like member located on the case side in the folded state
The two ends across the opening are the sliding parts with the case.
The sliding area between the shutter member and the case is extremely small
Yes. For this reason, it accompanies sliding between the case and the shutter member.
The generation of wear powder can be suppressed or prevented. Also, a shutter member having one end fixed.
Is folded to open the opening.
The sliding part between the tatter member and the case is a disc cartridge.
The part covered with the shutter member when storing
Therefore, dust or the like will not adhere to the sliding part.
Yes. As a result, the sliding movement between the shutter member and the case
Prevents dust adhering to the outer surface of the case from entering the case
Is done. Thus, the disc car according to claim 1 is provided.
The sliding area between the shutter member and the case is
Less dust resistance. Further, the disk cartridge having the above structure.
Let's open the shutter members in the folded state
In other words, the shutter member is in the width direction.
Open the opening while reducing the size of the (folding direction)
Therefore, the shutter member simply slides in the width direction as in the past.
Shutter when opening
The material storage space is reduced. Thus, the size of the opening is maintained while maintaining the size of the opening.
The size of the case is reduced, and conversely the case dimensions are maintained.
The opening can be enlarged while accommodating a large recording / reproducing head.
It becomes. For this reason, the drive device uses a large optical pick.
Can be used and the manufacturing cost is low
Is reduced. In addition, the disk cartridge having the above structure
The height of the shutter member in the folded state
(Width dimension of the plate-like member) is half the height (thickness) of the case
If the configuration is as follows, the disc when the opening is open
Cartridge height dimensions (i.e.
Disk cartridge storage space)
Is preferred. In particular, the shutter member in the folded state
From the height of the case to the disc media
Shutter as less than half the dimension minus the thickness dimension
-The shutter member is the case when the member is folded.
If the structure does not protrude beyond the outer surface of the
The Note that the height of the shutter member is kept low.
To increase the number of plate members (when folded)
It is necessary to increase the width dimension of
In the configuration with the main folding shutter member,
The street opening can be made sufficiently larger than before. DETAILED DESCRIPTION OF THE INVENTION According to the first embodiment of the present invention.
The disk cartridge 10 is based on FIGS.
And explain. For convenience of explanation, the disc cartridge
Loading direction of the wedge 10 to the drive device (shown as appropriate in FIG.
Arrow A direction) is the forward direction, arrow B direction, arrow C
Disc cart with the direction downward and right respectively
The front / rear / left / right / upper side of the ridge 10 is expressed. FIG. 1A shows a disk cartridge 1.
A perspective view from below showing the non-use state of 0 is shown.
FIG. 1B shows the use of the disk cartridge 10.
The perspective view seen from the lower part which shows a state is shown. As shown in these figures, the disc car
The cartridge 10 is a disc media that is an information recording / reproducing medium.
The via 12 can be rotated in a substantially rectangular case 14 in plan view.
Contained in Noh. Disc media 12
Is formed in a disk shape, with a drive device in the center.
Center hole (center ho
And 12A on the lower surface 12B.
The recorded surface is covered with a cover layer (not shown).
Protected. Each case 14 is made of a synthetic resin material.
The upper shell 16 and the lower shell 18 abut each other's peripheral walls.
Formed in the shape of a substantially rectangular box
The The lower shell 18 is recessed upward from its lower surface 18A.
There is a recess 20 formed in a rectangular shape in plan view.
Open at the center of the recess 20 in a rectangular shape in plan view.
A mouth 22 is provided. The front end of the recess 20 is the front end of the case 14.
And a shutter that will be described later.
-Left and right sides of case 14 corresponding to 40 folding spaces
Offset slightly to the left of the center of the direction
The The opening 22 has a rectangular shape slightly smaller than the recess 20.
Disc media that is shaped and housed inside the case 14
The center hole 12A of the bearing 12 and the disk medium 12
Inner edge along one radial direction (edge of center hole 12A)
A part of the lower surface 12B including the part extending from the outer periphery to the outside
Large exposure is possible. That is, the opening 22 is
Access to the disk media 12 accommodated in the case 14
It is intended for use. The bottom surface of the recess 20 surrounding the opening 22 is
The shutter contact with which the peripheral edge of the shutter 40 to be described abuts.
A contact surface 24 is provided. Also, at the rear end of the recess 20
The step with the lower surface 18A has a substantially entire length in the left-right direction.
A first guide groove 26 is provided. In addition, as shown in FIG.
As shown, the upper surface 16A of the upper shell 16 (case 14).
In the vicinity of the front end of the second guide groove 28 is provided along the left-right direction.
It is Furthermore, the front end of the case 14 has an inner
An opening / closing mechanism chamber 32 that is a space partitioned by the wall 30 is provided.
Arrangement of tension coil spring 62 and the like which will be described later
It is for use. On the front surface 14A of the case 14, an opening / closing machine
A slit 34 communicating with the composition room 32 is provided. The disc cartridge 10 has an opening.
A shutter 40 for opening and closing the door 22 is provided. Shi
The shutter 40 includes a bellows-shaped shutter member 42 and a case.
When the opening portion 22 is opened and closed
An operation member 50 to be operated is provided. The shutter members 42 are each rectangular.
A plurality of (six in the first embodiment) formed on the board
Bellows plates 42A as a slab member alternate in the width direction
It is connected to be foldable. Shutter
-The shape and dimensions of the member 42 when deployed are the recesses 20 of the case 14
It corresponds approximately to. At one end of the shutter member 42 is a bellows plug.
Narrower than rate 42A and the same thickness as bellows plate 42A
Fixed portion 44 along the longitudinal direction of the bellows plate 42A.
It is connected so that it can be folded. The fixing portion 44 is formed in the recess 2
Front and rear of the shutter contact surface 24 at the left end of 0
It is fixed along the direction by bonding or the like. Meanwhile, Sha
An operation member 50 is connected to the other end of the utter member 42.
Yes. The operating member 50 is from the bellows plate 42A.
Is also provided with a long connecting portion 52. The connecting part 52
The other end of the shutter member 42 in the central portion in the longitudinal direction;
Foldable with the widthwise end of the bellows plate 42A
It is connected. The connecting portion 52 is a shutter contact surface.
24 is slidably contacted with the bellows plate
The rear end protruding from the rear end of 42A is the first of the case 14.
The guide groove 26 is slidably inserted. Further, the operation member 50 is a bellows of the connection portion 52.
The front end protruding from the front end of the plate 42A is the case 1
4 and the operation portion 54 bent along the front surface 14A.
The upper end portion of the portion 54 is bent along the upper surface 16A of the upper shell 16.
A bent holding portion 56 is provided. The end of the holding part 56 is
The guide portion 58 is bent downward, and the second guide
It is slidably inserted into the groove 28. The operation unit 54 has a slit extending rearward.
The spring hooking claw 60 that enters the opening / closing mechanism chamber 32 from 34 is provided.
It is The spring hook 60 is the right end of the operation unit 54.
At the center of the opening / closing mechanism chamber 32 in the height direction.
positioned. One end of the spring hook 60 is an opening / closing machine.
In addition to the tension coil spring 62 held at the right end of the composition room 32
The end is locked, and the tension coil spring 62 is biased.
The operating member 50 is biased rightward by the force. Na
The operation member 50 has a connecting portion 52 connected to the right end portion of the recess 20.
Abutted against the stopper 20A, which is a step with the lower surface 18A.
So that further movement to the right is restricted.
It has become. Thus, the shutter member 42 can be
Usually, the connection part 52 of the operation member 50 to which the other end part is connected.
Is stopped by the biasing force of the tension coil spring 62.
Deploys by being in contact with A (separated from the fixed portion 44)
In this configuration, the opening 22 is closed. This state
Then, each bellows plate 42 </ b> A has a shutter contact of the recess 20.
Along the contact surface 24 (formation surface of the opening 22), they are aligned with each other.
And both ends in the longitudinal direction (the longitudinal direction of the case 14)
The upper surface of the part contacts the shutter contact surface 24 of the recess 20.
They are in contact (the state shown in FIG. 1A). On the other hand, the urging force of the tension coil spring 62 is resisted.
The operating member 50 is moved to the left (the connecting portion 52 is fixed).
The shutter member 42 is each bellows
Plates 42A are alternately folded to enlarge opening 22
The structure is opened (becomes the state shown in FIG. 1B). At this time, the operating member 50 is connected to the connecting portion 52.
The rear end is guided by the first guide groove 26 and guided
The portion 58 is guided by the second guide groove 28, so that
Slide smoothly without sticking, each bellows plate 4
Connecting part located on the case 14 side in the folded state of 2A
(The connecting portion 42B shown in FIG. 3) is connected to the shutter contact surface 2
4 (sliding portion 42B and shutter contact surface 2)
4 with the shutter member 42 folded
Fold). Next, the operation of the first embodiment will be described.
explain. In the disk cartridge 10 having the above-described configuration,
When the disk medium 12 is not used, the opening 22 is
It is blocked by the shutter 40. That is, as shown in FIG.
Connection of the operating member 50 by the biasing force of the tension coil spring 62
The portion 52 is brought into contact with the stopper portion 20A of the case 14.
Of the shutter member 42 constituting the shutter 40.
Each bellows plate 42A contacts the shutter of the case 14
Are aligned with each other along the surface 24, and the front and rear ends are respectively
The opening 22 is closed by contacting the shutter contact surface 24.
The As a result, the disc medium 12 is not used.
Dust intrusion into the disk cartridge 10 during use
Into the bottom surface 12B of the disk media 12
Dust adhesion is prevented. The disc cartridge 10 is a disc cartridge.
When using the media 12 (to the disc media 12
Recorded on the disc media 12 when recording information
When reproducing information), the front surface 14A of the case 14
Loaded into the drive unit along the arrow A direction with the head
The With this loading, the operation section 5 of the operation member 50 is operated.
The right end face of 4 is engaged to the left by the opening / closing member of the drive device.
It is pressed in the combined state. Then, the operation member 50 is
Slide to the left against the biasing force of the spring 62,
The connecting part 52 is close to the fixing part 44 fixed to the case 14
Let As a result, the shutter member 42 can be
The opening 22 is opened while the sheets 42A are alternately folded. At this time, as shown in FIG.
Located on the case 14 side in the folded state of the rate 42A
Two connecting portions 42B and a connecting portion 52 of the operating member 50
Move along the shutter contact surface 24 (sliding)
) As shown in FIG. 1B, the shutter portion.
When the material 42 is completely folded (each bellows plate 42A
Of the operation member 50).
The leftward movement is restricted and the operation member 50 is
By the opening / closing member of the drive device engaged with the operation unit 54
Thus, the open state of the opening 22 is maintained (the operation member 50 is opened).
Held by a closing member). In this state, the disk cartridge 10 is
Positioned in the drive device and rotated from the opening 22
The handle shaft is inserted. This rotating spindle axis is the tip
The center hole 12A of the disk media 12 is engaged
The disk media 12 is held in the center
Rotate around. In addition, a recording / reproducing head
Is inserted, and information is recorded on the recording surface of the disk media 12.
Record or play back information recorded on the recording surface. On the other hand, the disc cartridge 10 is
When ejected from the Eve device, the positioning state is released.
And move in the discharge direction (the direction opposite to the direction of arrow A)
Is done. Along with this movement, the operation member 5 by the opening and closing member.
0 is released, and the disk cartridge 10 is
It is discharged from the drive device while closing the opening 22. Specifically, the operation member 50 is a tension coil.
It slides to the right by the urging force of the screw 62, and the connecting portion 52
Is separated from the fixing portion 44. This makes the shutter
The member 42 opens while expanding each bellows plate 42A.
22 is closed, and the connecting portion 52 is the stopper portion 2 of the case 14.
When in contact with 0A, the opening 22 is completely closed.
Return. Here, the shutter 40 has a plurality of bellows processes.
A bellows shape in which the rates 42A are connected so as to be alternately foldable.
Of the opening 22 of the case 14.
It is fixed near the edge (left end of the shutter contact surface 24)
And fixed connected to one end of the shutter member 42
Connected to the other end of the shutter member 42 with respect to the portion 44.
When the connecting portion 52 of the operating member 50 is contacted or separated, the opening 22 is formed.
In order to open and close the case 14 and the case 14
The sliding area with the cutter 40 is small. That is, the shutter 40 has a plurality of bellows.
A plurality of plates 42A that can be folded alternately.
Of the connecting portions, the connecting portion 42B and the connecting portion 5 shown in FIG.
Only the two longitudinal ends of 2 are shutters of the case 14
If it slides on the contact surface 24 (near the edge of the opening 22), the foot
Thus, the sliding (contact) area with the case 14 is extremely small.
For this reason, it accompanies sliding of the case 14 and the shutter 40.
The generation of wear powder can be suppressed or prevented. Further, one end of the case is fixed to the case at the fixed portion 44.
The bellows-like shutter member 42 fixed to 14 is folded.
In other words, in order to open the opening 22, in other words, the shutter
-4 Shutter contact that is a sliding part between the case 14 and the case 14
The surface 24 is shut when the disk cartridge 10 is stored.
By the shutter 40 (the shutter member 42 and the connecting portion 52).
So that dust, etc. will adhere to the sliding part.
There is nothing to do. As a result, the shaft accompanying opening / closing of the opening 22
The outer surface of the case 14 due to the sliding between the case 40 and the case 14
Intrusion of dust adhering to the case 14 into the case 14
Is prevented. Thus, the data according to the first embodiment is as follows.
In the disk cartridge 10, the shutter 40 (shutter)
The sliding member 42) and the case 14 have a small sliding area to prevent
Improves dustiness. Further, in the disk cartridge 10,
The shutter members 42 constituting the shutter 40 are alternately
In other words, to open the opening 22 in the folded state,
For example, the shutter member 42 has a width direction (left and right sides of the case 14).
Opening 22 while reducing the size of the folding direction).
The shutter member is simply wide
Shutter member 42 in comparison with the configuration of sliding in the direction
The accommodation space for (shutter 40) is reduced. As a result, the size of the opening 22 is maintained.
The case 14 is reduced in size, and conversely the case 14
The opening 22 can be enlarged while maintaining the dimensions, and a large recording / reproducing operation can be performed.
It becomes possible to correspond to the head. That is, like the conventional plate-like
The shutter member slides along the case.
The maximum dimension in the left-right direction of the opening 22 is the right and left of the case 14
Half of the direction dimension (considering access to the center hole 12A
Then it becomes smaller, and one shutter member
In the configuration shown in FIG. 8 that opens in both directions, it was 1/3).
Is provided with a folding (bellows) shutter member 42
Can greatly expand the horizontal dimension of the opening 22
The For this reason, the drive device has a large optical pickup.
Can reduce the manufacturing cost.
It is. Next, a modification of the first embodiment will be described.
4 and FIG.
This will be explained. Note that the basic configuration of the first embodiment is the same as that of the first embodiment.
The same parts and parts are denoted by the same reference numerals, and
Description is omitted. FIG. 4A shows a disk cartridge 7.
A perspective view from below showing the non-use state of 0 is shown.
FIG. 4B shows the use of the disk cartridge 70.
The perspective view seen from the lower part which shows a state is shown. As shown in these figures, the disc car
In the trench 70, the case 14 (lower shell 18) has a recess.
A recess 72 is provided instead of 20. The recess 72 is
It is formed deeper than the recess 20. About this depth
Will be described later. The shutter 40 is a shutter member.
Instead of 42, a shutter member 74 is provided. Shatter
The shutter member 74 is larger than the shutter member 42 (this change).
Eight bellows plates 74A are folded alternately.
It is configured to be connected. Each bellows plate 74
A width dimension (ie, shutter in the folded state)
-The height dimension of the member 74) corresponds to the depth of the recess 72.
Yes. As a result, FIG. 5 (A) and FIG. 5 (B)
As shown, the shutter member 74 is in a folded state.
From the lower surface 18A of the lower shell 18 (case 14)
Also, it is configured not to protrude. Specifically, FIG.
As shown in (B), the width dimension of each bellows plate 74A
W is the disk medium from the thickness (height) dimension d of the case 14.
Less than half of the dimension obtained by subtracting the thickness dimension t of the media 12
(Ie, W <(dt) / 2
) Further, the right end of the recess 72 (stopper portion 20A
The shutter contact surface 24 located in the vicinity of the
A convex portion 24A having a shape is provided along the front-rear direction of the case 14.
The connecting portion 52 of the operation member 50 corresponds to the convex portion 24A.
A recess 52A is provided. By this convex part 24A
In the slight gap between the stopper portion 20A and the connecting portion 52
To prevent intrusion of dust into the case 14
It has become. Further, the convex portion 24A is formed in a mountain shape.
Thus, the connecting portion 52 is moved in the left-right direction of the operation member 50.
Along with the slide is slightly inclined (connected bellows
Recess 5 (folded slightly against plate 74A)
The protrusion 24A can be advanced and retracted to 2A. This connection
In order to allow a slight inclination of the connecting portion 52, the first guide
At the right end of the groove 26, there is a widened portion 26A that is slightly widened.
Is provided. The disk cartridge having the structure according to the present modification example.
Disc 70 according to the first embodiment also by
In addition to obtaining the same effect as the cartridge 10,
In the cartridge 70, the following effects can be obtained. In the disk cartridge 70, the bellows pre-
The width dimension W can be reduced by increasing the number of cover 74A.
4 to a thickness dimension t of the disk medium 12
Is less than half of the dimension minus
In the folded state without increasing the thickness of the sleeve 14
The cutter member 74 can be accommodated within the thickness range of the case 14.
(The shutter member 74 should not protrude from the lower surface 18A.
I). Therefore, even when the opening 22 is open,
The total height of the disk cartridge 70 is the thickness of the case 14
Dimension d and the disk cartridge 70 is loaded.
Accommodation of disk cartridge 70 in drive device
The height of the space can be kept small. In other words, bellows type
Even if the cutter member 74 is used, the drive device can be made thinner.
It is done. In addition, by increasing the bellows plate 74A,
The left and right direction of the shutter member 74 in the folded state
Increased stacking dimensions (sum of thickness of each bellows plate 74A)
However, this also provides the bellows-like shutter member 74.
In the obtained configuration, the opening 22 is sufficiently larger than the conventional one as described above.
I can. Further, the convex portion 24 is formed on the shutter contact surface 24.
By providing A, the disk cartridge 7
0 is stored with the lower surface 18A facing upward, and the stopper part
Dust enters the slight gap between 20A and the connecting portion 52.
However, this dust is prevented from entering the case 14
Therefore, the dust resistance is further improved. In the first embodiment and the modification example,
Are both ends of the shutter member 42 in the folding direction.
Shutter contact surfaces 24 are also formed on the left and right sides of the opening 22.
However, the present invention is not limited to this, and
The contact surface 24 is in the folding direction of the shutter member 42.
Set at the end of the intersecting direction (outer edge of front and rear of opening 22)
If it is enough, the fixing part 44 and the longitudinal direction of the connecting part 52
The central part of the direction is not in contact with the shutter contact surface 24
May be. Next, the data according to the second embodiment of the present invention will be described.
The disk cartridge 80 is based on FIG. 6 and FIG.
And explain. Note that basically the same as the first embodiment.
The same parts and parts are denoted by the same reference numerals and their explanations.
I will omit the description. FIG. 6 shows the entire disk cartridge 80.
A partially cutaway perspective view showing the body configuration is shown. This
As shown in the figure, the disk cartridge 80 is
A shutter 100 that moves in the direction to open and close the opening 90
It differs from the disk cartridge 10 etc. in the point provided. Less than
This will be described in detail below. The disk cartridge 80 is a disk medium.
It has a case 82 for rotatably receiving the media 12
The Each case 82 has an upper shell made of a synthetic resin material.
State where the wall 84 and the lower shell 86 abut each other's peripheral walls
It is formed in the substantially rectangular box shape joined by. The lower shell 86 has a lower surface 86A than the lower surface 86A.
A concave portion 88 formed in a rectangular shape in plan view is provided.
It has been. The concave portion 88 is the central portion of the case 82 in the left-right direction.
Is located at the front end of the case 82
There is also an opening. An opening is formed in the central portion of the recess 88 in the left-right direction.
90 is provided. The opening 90 is younger than the recess 88.
From the vicinity of the rear end of the recess 88 while being a small rectangular shape
To the front end of the recess 88 (case 82), in front of the case 82
It is connected to a window portion 92 provided on the surface 82A. This opening 90 is accommodated inside the case 82.
The center hole 12A of the disc medium 12 and the disc
The outer periphery from the inner edge along one radial direction of the squemedia 12
A part of the lower surface 12B including the part extending over the part is greatly exposed to the outside.
It is possible to put out. That is, the opening 90 is formed in the case 8.
2 for accessing the disk media 12 stored in
It is. A shape of “U” is formed around the opening 90 in a plan view.
The bottom surface of the formed recess 88 is a shutter 100 described later.
The shutter contact surface 24 with which the peripheral edge of the
The The lower shell 86 has a lower surface 86A.
And a sliding recess having an intermediate height between the shutter contact surface 24 and the shutter contact surface 24
94 is provided on each of the left and right sides of the recess 88.
The sliding recess 94 has a recess 88 in the left-right direction.
From the left and right edges of the case to the left and right ends of the case 82
In the vicinity of the rear end of the opening 90 from the front end of the case 82.
Has reached. Furthermore, the left and right sides of the case 82 are
A pair of guide grooves 96 are provided along the rear direction.
Each guide groove 96 is opened at the front end of the case 82.
And is closed near the rear end of the case 82. this
An end surface for closing each guide groove 96 is a spring receiving surface 98.
ing. The disc cartridge 10 has an opening.
A shutter 100 for opening and closing 90 is provided.
The shutter 100 is a bellows-shaped shutter member 102.
The fixing portion 44 fixed to the case 82 and the opening 90
Open and close the operating member 104 and the window 92 that are operated when opening and closing
And a cover member 106 to be configured. The shutter members 102 are each rectangular.
A plurality of (eight in the second embodiment) formed in a shape
A bellows plate 102A as a plate member is arranged in the width direction.
It is configured to be alternately foldable. Sha
The shape dimension of the utter member 102 when deployed is the concave of the case 82.
This substantially corresponds to the portion 88. A bellows is attached to one end of the shutter member 102.
Narrower than plate 102A and bellows plate 102A
The fixed portion 44 having the same thickness as the longitudinal direction of the bellows plate 102A
It is connected so that it can be folded along. Fixed part 44
Is the shutter contact surface 24 located at the rear end of the recess 88.
It is fixed along the horizontal direction. On the other hand
The operation member 104 is connected to the other end of the switch member 102.
ing. The operating member 104 is a bellows plate 102A.
And a thick connecting portion 108. Connection 1
The thickness of 08 is the depth of the recess 88 (the lower surface 86 of the lower shell 86).
Height from A to the shutter contact surface 24)
The The connecting portion 108 is connected to the other end of the shutter member 102.
End in the width direction of the bellows plate 102A serving as a portion (front end)
And foldable connected. Further, from both ends of the connecting portion 108, a thin wall
The pair of arm portions 110 are the upper ends of the connection portions 108, respectively.
It extends to the left and right along the surface and the longitudinal direction. Each
Each of the left and right ends of the case 82
Bent along the side surface of the case 82 and its tip
Is provided with an operation block 112 corresponding to the guide groove 96.
It has been. The operation member 104 has a connecting portion 108 which is connected to the operation member 104.
In a state in which the cutter contact surface 24 is slidably contacted,
The arm part 110 is slidably disposed in the sliding recess 94.
In addition, each operation block 112 has a guide groove 96 respectively.
It is slidably inserted in. The shutter member 1
In the unfolded state of 02, the front end surface of the connecting portion 108 is the case 8.
The dimensions of each part are determined so as to be flush with the front surface 82A.
It is. Further, the thickness of each arm part 110 is the sliding recess 9.
4 substantially corresponds to the depth from the lower surface 86A. In addition, each guide groove 96 of the case 82 has a guide.
Each compression coil spring 114 is disposed in a compressed state.
The Each compression coil spring 114 has a cable at one end.
And the other end is abutted against the spring receiving surface 98 of the spring 82.
It is in contact with the operation block 112. As a result,
The working member 104 is moved forward by each compression coil spring 114.
The front end surface of each operation block 112 is
Stopper provided near the front end of the guide groove 96
Engage with 116 to prevent further forward movement
Has been. Furthermore, the connection portion 108 of the operation member 104
A plate-like cover member 106 can be folded on the front end face
It is connected. The cover member 106 has a length in the left-right direction.
Is the same length as the connecting portion 108 (the bellows plate 102A).
Thus, the window portion 92 of the case 82 can be closed. Ma
A leaf spring is provided between the connecting portion 108 and the cover member 106.
118 is provided, and the leaf spring 118 is a cover portion.
The material 106 is moved upward with respect to the connecting portion 108 (to the window portion 92 side).
It is energized in the folding direction. In this way, the shutter member 102 can be
Normally, the operation member 104 to which the other end is connected is a compression coil.
The spring 116 is brought into contact with the stopper 116 by the biasing force.
To be deployed (separated from the fixed portion 44).
Thus, the opening 90 is closed. In this state, each snake
The abdomen plate 102A is provided on the shutter contact surface 24 of the recess 88.
Are aligned with each other along both ends of the longitudinal direction.
The upper surface of the contact with the shutter contact surface 24 of the recess 88
(It will be in the state of FIG. 6). On the other hand, the operation member 104 is a compression coil spring 1.
14 is moved backward against the urging force of 14 (connection portion 108
The shutter member 102).
Each of the bellows plates 102A is alternately folded to open the opening 9
In this configuration, 0 is greatly opened. At this time, the operation member 1
04, each operation block 112 has a guide groove 96 respectively.
Smoothly without being rattled by being guided by
In the folded state of each bellows plate 102A,
Connecting part located on the side of the support 82 (the connection shown in FIG. 7B)
Part 102 </ b> B) to slide with the shutter contact surface 24.
It has become. Next, the operation of the second embodiment will be described.
explain. With the disk cartridge 80 configured as described above,
When the disk medium 12 is not used, the opening 90 and
Window 92 is closed by shutter 100
The That is, as shown in FIG. 6 and FIG.
Thus, the operating member is applied by the biasing force of the compression coil spring 114.
104 operation block 112 is brought into contact with stopper 116.
The shutter part that constitutes the shutter 100
Each bellows plate 102 </ b> A of the material 102 is connected to the case 82.
Are aligned with each other along the cutter contact surface 24,
The left and right end portions abut against the shutter abutment surface 24 and the opening 90
Occlude. Also connected by the biasing force of leaf spring 118
Cover member biased in the folding direction with respect to the portion 108
106 abuts against the front surface 82A of the case 82 and opens the window 92.
Block. As a result, the disc medium 12 is not used.
Dust intrusion into the disk cartridge 80 during use
Into the bottom surface 12B of the disk media 12
Dust adhesion is prevented. The disc cartridge 80 is a disc cartridge.
When using the media 12, the front surface 8 of the case 82
Install the drive unit in the direction of arrow A starting with 2A.
Be filled. With this loading (insertion), the disc cart
Each guide groove 96 of the ridge 80 has a drive device.
A pair of convex portions (not shown) opposite to each other are inserted
The The protrusions inserted into the guide grooves 96 are
As the cartridge 80 is further inserted, the guide groove 9
6 to move backward relative to the operation block 112
Abut and press backwards. Then, the operation member 104 is a compression coil.
Slid backward against the urging force of Ne 114,
The connecting portion 108 is brought close to the fixing portion 44. This
The shutter member 102 moves each bellows plate 102A.
Opening 90 is opened while being folded alternately. At this time,
7 (B), the folding of each bellows plate 102A
Three connecting portions 1 located on the case 82 side in the folded state
02B and the connection part 108 of the operation member 104 are shutters.
-It moves (slids) along the contact surface 24. Further, as the operating member 104 moves backward,
Thus, the cover member 106 resists the urging force of the leaf spring 118.
However, it will be in a state along the shutter contact surface 24 and
It moves rearward while sliding with the contact surface 24. This
Thus, the window 92 is opened. The shutter member 102 is completely folded.
(The laminated state of each bellows plate 102A in the thickness direction and
Then, the operation member 104 is moved further backward.
Be regulated. This state (shutter member 102 is completely
The convex part comes into contact with the operation block 112 while being folded.
Disk cartridge 80 is positioned in the
Thereby, the open state of the opening 90 and the window part 92 is maintained.
Note that the arm portion 110 is a lower end of the sliding recess 94.
The operation member 104 is in contact with the step at the boundary with the surface 86A.
Further rearward movement may be restricted. In this state, the rotary spindle is opened from the opening 90.
An axis is inserted. This rotating spindle shaft is at the tip.
The center hole 12A of the disk media 12 is engaged and sucked.
Hold the disc media 12 around the axis.
Rotate. In addition, the recording is replayed from the opening 90 and the window 92.
A raw head is inserted and the recording surface of the disk media 12 is
Record information or play back information recorded on the recording surface
To do. On the other hand, the disk cartridge 80 has a drive unit.
When ejected from the Eve device, the above positioning state is
Removed. Then, due to the biasing force of the compression coil spring 114,
The operation block 112 presses the convex part of the drive device.
The disk cartridge 80 is ejected from the drive device.
The operation member 104 is slid forward of the case 82 while being
Let Along with this slide, the operation member 104 is moved.
The connecting part 108 is separated from the fixing part 44. This
The shutter member 102 displays each bellows plate 102A.
The opening 90 is closed while being opened, and the operation block 112 is closed.
Open 90 completely when it comes into contact with stopper 116
It returns to the initial state where it is blocked. In this state, the connection
The front end surface of the connecting portion 108 matches the front surface 82A of the case 82.
The cover member 106 is moved by the biasing force of the leaf spring 118.
The window 92 is closed by returning to the initial position. Here, the shutter 100 has a plurality of bellows.
Snakes in which plates 102A are connected to each other so as to be foldable
It has an abdominal shutter member 102 and the edge of the opening 90
While being fixed to (the rear end portion of the shutter contact surface 24)
Fixed portion 44 connected to one end of shutter member 102
With respect to the operation connected to the other end of the shutter member 102.
When the connecting portion 108 of the working member 104 contacts and separates, the opening 90 is formed.
In order to open and close the case 82 and the case 82
The sliding area with the cutter 100 is small. That is, the shutter 100 has a plurality of snakes.
Multiple plates that connect the belly plates 102A so that they can be folded alternately.
Of the number of connecting portions, the connecting portion 102 shown in FIG.
B, the connecting portion 108 and the cover member 106 in each longitudinal direction
Only the both ends are connected to the shutter contact surface 24 (opening of the case 82).
90) and the case 82 is sufficient.
The sliding (contact) area is extremely small. For this reason, Case 8
2 prevents the generation of wear powder due to sliding between the shutter 2 and the shutter 100.
Can stop or prevent. In addition, the case is fixed to the case at one end.
The bellows-shaped shutter member 102 fixed to 82 is folded.
In other words, in order to open the opening 90, it is shut.
The sliding part of the cartridge 100 and the case 82 is a disc cart.
When storing the ridge 80, the shutter 100 (shutter portion
Covered by the material 102 and the connection 108)
Therefore, dust or the like does not adhere to the sliding part. this
By using the shutter 100 and the case
Of dust adhering to the outer surface of the case 82 due to sliding with the
Intrusion into the case 82 from the opening 90 is prevented. In this way, the data according to the second embodiment is
In the disk cartridge 80, the shutter 100 (shaft
The sliding area between the utter member 102) and the case 82 is small.
And dust resistance is improved. Further, in the disk cartridge 80,
The shutter member 102 constituting the shutter 100 is exchanged.
In other words, in order to open the opening 90 in a folded state,
Then, the shutter member 102 is arranged in the width direction (the case 14
Open while reducing the size of the folding direction
In order to open the opening 90, the shutter member is simply used as in the prior art.
Shutter member in comparison with the configuration that slides in the width direction
The storage space for 102 (shutter 100) is small
The As a result, the size of the opening 90 is maintained.
The case 82 can be downsized, and conversely
The opening 90 can be enlarged while maintaining the dimensions.
It becomes possible to correspond to the head. That is, like the conventional plate-like
The shutter member slides along the case.
The maximum dimension of the opening 90 in the left-right direction is the right and left of the case 82
Half of the direction dimension (considering access to the center hole 12A
Then it becomes smaller, and one shutter member
In the configuration shown in FIG. 8 that opens in both directions, it was 1/3).
However, a folding (bellows) shutter member 102 is provided.
Can greatly expand the horizontal dimension of the opening 90.
The For this reason, the drive device has a large optical pickup.
Can reduce the manufacturing cost.
It is. Furthermore, with the disk cartridge 80,
Is simply associated with the loading of the drive device (depending on the loading force).
The convex part fixedly arranged on the drive device is the guide groove 9
The shutter 100 is opened 90 by relative movement in 6.
Because the drive is driven in the opening direction, the structure of the drive device is simple
It becomes. In the second embodiment, the display is
A preferred configuration in which the cartridge 80 includes a window 92;
However, the present invention is not limited to this.
Of course, the wedge 80 does not have to have the window 92.
Nor. Further, the disk cartridge according to the present invention.
The disk cartridge 1 according to each of the above embodiments
It is not limited to 0, 70, 80. For example, the above
It is possible to adopt a configuration that appropriately combines the components of each configuration.
Is possible. Thus, for example, the disc cartridge
The die 10 may be provided with a convex portion 24A, a concave portion 52A, etc.
Bellows plate 74A in disc cartridge 70
The shutter member 74 in the folded state is increased by increasing the number of
The structure that does not protrude from the lower surface 18A of the case 14 is
The cartridge may be applied to the cartridge 80. Further, in each of the above embodiments and modifications,
The disk cartridges 10, 70, 80 have shutters
-The other end of the members 42, 74, 102 is fixed to the fixed portion 44.
A configuration including operation members 50 and 104 for contacting and separating
However, the disk cartridge according to the present invention has a bellows shape.
It is sufficient if the shutter member 42 is provided, and the operation member
Shutter unit is not limited by structure
The other end of the material 42 or the like may be brought into contact with or separated from the fixed portion 44.
Needless to say. Further, the shutter member 42 and the like
Is fixed to the case 14 or the like via the fixing portion 44
Is not limited to the case 14 etc. by the hinge structure etc.
On the other hand, it may be directly attached so as to be foldable. Furthermore, the above embodiments and modifications
Then, the shutter members 42, 74, and 102 are expanded.
In this state, the upper surface is brought into contact with the shutter contact surface 24 and the opening 22 is
Alternatively, the opening 90 is preferably closed.
For example, the shutter member 102 is not limited to this.
Are both end faces in the direction (left and right) perpendicular to the folding direction.
The inner edge of the opening 90 (the side wall defining the opening 90,
For example, the left and right inner surfaces of the recess 88 are slidably contacted.
Open the upper surface without contacting the case 82
It is good also as a structure which obstruct | occludes the opening | mouth 90. FIG. Similarly, Sha
For the tatter members 42 and 74, for example, both front and rear ends
Sliding with the inner surfaces of the recesses 20 and 72 whose front surfaces are sealed
The upper surface is in contact with the case 14 in its unfolded state.
It is good also as a structure which obstruct | occludes opening 22 without doing. In the above embodiments and modifications,
When the openings 22 and 90 are closed, the shutter members 42 and 7
4, 102 are fully deployed (each bellows plate 42A
Etc.), but the present invention is preferred.
For example, the shutter member 42 is not limited to this.
Is within a range that does not protrude from the lower end of the recess 20 or the like.
In a state where the adjacent bellows plates 42A and the like are inclined to each other
The opening 22 or the like may be closed. Furthermore, in each of the above embodiments and modifications,
The disc media 12 is a single-sided recording type and is open.
A structure in which the ports 22 and 90 are provided below the cases 14 and 82.
However, the present invention is not limited to this.
The disk media 12 is a double-sided recording type and the opening 22 and the like are above.
Shutter that opens and closes the upper and lower openings as a configuration provided on the side
-Arrange the members 42 (shutter 40) etc.
Both are possible. As has been described above, the disc according to the present invention.
The cartridge is a sliding surface between the shutter member and the case.
It has an excellent effect of reducing the volume and improving the dust resistance.
The

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a diagram showing an external appearance of a disk cartridge according to a first embodiment of the present invention as viewed from below;
Is a perspective view showing the closed state of the opening, (B) is a perspective view showing the open state of the opening. FIG. 2 is a cross-sectional view taken along line 2-2 of FIG. FIG. 3 is a perspective view showing a process of opening the opening of the disc cartridge according to the first embodiment of the present invention. FIGS. 4A and 4B are views showing an external appearance of a disc cartridge according to a modification of the first embodiment of the present invention as viewed from below, in which FIG. 4A is a perspective view showing a closed state of an opening, and FIG. It is a perspective view which shows the open state of opening. 5A is a cross-sectional view taken along line 5A-5A in FIG. 4B, and FIG. 5B is a cross-sectional view taken along line 5B-5B in FIG. 4B. FIG. 6 is a partially cutaway perspective view showing the appearance of the disc cartridge according to the second embodiment of the present invention as viewed from below. 7A and 7B are views showing a disk cartridge according to a second embodiment of the present invention, in which FIG. 7A is a cross-sectional view showing a closed state of an opening, and FIG. 7B is a cross-sectional view showing a process of opening the opening. is there. 8A and 8B are diagrams showing a conventional disk cartridge, in which FIG. 8A is a perspective view showing a closed state of an opening, and FIG. 8B is a perspective view showing an opened state of the opening. [Description of Symbols] 10 Disc cartridge 12 Disc media 14 Case 22 Opening 42 Shutter member 42A Bellows plate (plate member) 70, 80 Disc cartridge 74, 102 Shutter members 74A, 102A Bellows plate (plate member) 82 Case 90 Opening

Claims (1)

1. A case in which a disk-shaped disk medium is rotatably accommodated, an opening provided in the case for accessing the disk medium, and a plurality of plate-like members alternately. A disk cartridge comprising: a shutter member that is foldably connected, has one end in the folding direction fixed to the case, and the other end is in contact with and away from the one end to open and close the opening.