JP2003077248A - Disk cartridge - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a disk cartridge in which dust control performance is improved by reducing a sliding area between a shutter member and a case, and the shutter member reliably opens and closes an opening. SOLUTION: The disk cartridge 10 has the shutter member 42 to open and close the opening 22 provided at the case 14 where a discoid disk medium 12 is housed rotatably. A plurality of bellows plates 42A are connected in alternately foldable manner in the shutter member 42, and the opening 22 opened and closed by bring an operation member 50 (one end part) into contact with and separating from a fixing part 44 (the other end) fixed to the case 14. The shutter member 42 has a guide pin 48 projected from the end of a connecting part 42B located at the case 14 side in a folded state, and reliably operates when the guide pin 48 is guided to the first guide groove 26 and the guide slit 38 of the case 14.

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 100.
Has been. The disc cartridge 100 is made of resin.
The disc-shaped disc media 102 can be rotated.
Case 104 and the center of the disk medium 102
The center hole 102A provided on the recording area and the recording surface (the
(Bar layer) to expose part of 102B to the outside
And an opening 106 provided in the tube 104, and a "U" shape in cross section.
Formed on the outer surface (upper and lower surfaces) of the case 104
Open by sliding along the shallow sliding groove 104A
And a shutter member 108 for opening and closing 106.
Has been. In this disk cartridge 100, a data cartridge is
When the disk medium 102 is not used, it is shown in FIG.
The opening 106 is closed by the shutter member 108 as shown.
Intrusion of dust into the case 104 (ie,
I.e., dust and the like on the disk media 102)
It is the structure to do. On the other hand, the disk medium 102 is used.
The case 104 (disk cartridge 100)
Is loaded into the drive device and used to open and close the drive device.
Therefore, the shutter member 108 is in the sliding groove 1 of the case 104.
The opening 106 is opened by moving while sliding with 04A. As a result, as shown in FIG.
The disk media 102 can be accessed. sand
That is, the center hole 102 of the disk medium 102
A holding by rotating spindle shaft of A and recording surface 102B
Recording / reproducing head (laser head that irradiates laser light
Etc.) is possible. However, this is not the case.
In such a conventional disk cartridge 100, the opening 10
When opening and closing 6, the shutter member 108 is moved to the case 104.
The sliding groove 104A slides along with this sliding.
Wear powder is generated, and wear powder is generated from the opening 106 into the case 104.
There was a case of intrusion. In particular, the shutter member 108 is
In the configuration made of a metal material, the shutter member 108 has
Therefore, the resin case 104 is easily worn, and the wear powder
Generation amount and intrusion amount increase. Also, storage of the disk cartridge 100
Sometimes dust adhering to the sliding groove 104A may cause the opening 106 to open.
Along with the movement of the shutter member 108 accompanying the closing, the opening 10
6 may enter the case 104. Thus, the wear that has entered the case 104
Powder or dust is removed from the surface of the disk medium 102 (recording surface 10
2B to protect or re-record
It causes a missing raw signal (so-called dropout). You
That is, the conventional disk cartridge 10 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 and the dustproofness is improved.
In addition, a disc cover whose shutter member reliably opens and closes the opening.
The purpose is to obtain a 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 for opening and closing the opening, and the plate-like portion
Projecting from the end in the direction perpendicular to the folding direction
A guide member provided on the case and a front member provided on the case
A guide for guiding the guide member along the folding direction.
Id means. 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
The shutter member is folded alternately.
In a state where each plate-like member is substantially laminated in the plate thickness direction
State), the opening is opened. Thus, the disk medium from the opening
For example, the drive device
The rotating spindle shaft enters and rotates the disk media.
When a recording / playback head, etc.
Recording of information on the recording surface and reproduction of information recorded on the recording surface
Done. Here, the shutter member opens and closes the opening.
When the guide member protrudes from the end of the plate member,
The folding direction (see
Direction of the other end of the cutter member)
The shutter member is in the middle
Away from the case when opening and closing (especially when closing the opening)
Smooth and reliable operation without folding (folding, exhibition
Open). The shutter member is a plurality of plate-like members.
Are formed in a bellows shape connected to each other so as to be foldable,
The other end with respect to one end of the folding direction fixed to the case
Since the opening is opened and closed by the contact and separation of the parts,
Small moving area. That is, for example, the shutter member
Contact the opening forming surface of the case (surface around the opening)
In the closed configuration, the shutter member is in contact with one end.
The other end part to be separated and each located on the case side in the folded state
Both ends across the opening in the connecting part of the plate-like member are cases
The sliding part between the shutter member and the case
The area is extremely small. For this reason, the case and shutter
The generation of wear powder due to sliding with the material can be suppressed or prevented.
The Furthermore, a shutter portion having one end fixed.
The material is folded to open the opening, in other words,
The sliding part between the cutter member and the case is a disc cartridge.
The part covered by the shutter member when storing the wedge
Therefore, dust or the like may adhere to the sliding part.
Absent. This allows sliding between the shutter member and the case.
This prevents dust adhering to the outer surface of the case from entering the case.
Stopped. Thus, the disc car according to claim 1 is provided.
The sliding area between the shutter member and the case is
Less dust-proof and the shutter member has a reliable opening
It opens and closes. The shutter member forms the opening of the case.
In the configuration in which the opening is closed by contacting the surface, a plurality of plate-like members
Positioned on the case side in the folded state of the connecting part
At least one connecting part (or its vicinity)
It is desirable to provide a guard member. The shutter member
Is a guide part protruding from both ends of the connecting part.
Material on both sides of the connecting part
Therefore, if the structure is guided, it will be shut when opening and closing.
It is preferable that the stopper member operates more reliably. In addition, the disk cartridge having the above structure
A plurality of plate-like members,
In the state where it is flush with the
Adhere adhesive tape to the side that will be the valley when folding.
If it is configured to continue, multiple plate-like members are folded alternately
A flexible shutter member is obtained with a simple structure
be able to. Further, the disk cartridge having the above structure.
In, as a guide member between adjacent plate-like members
Place guide pins and attach the guide pins to the adhesive tape
Configuration that keeps the shutter member from falling off
If so, shutter member and guide member with simple structure
(Guide pin) is connected. DETAILED DESCRIPTION OF THE INVENTION A disc according to an embodiment of the present invention.
The cartridge 10 will be described with reference to FIGS.
Light up. For convenience of explanation, the disk cartridge 1
0 loading direction to the drive device (shown as appropriate in FIG. 1 etc.)
Arrow A direction) is the forward direction, arrow B direction, arrow C direction
Disc cartridge as downward direction and right direction respectively
Express 10 front / rear / left / right / up / down. 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 possible 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 as a guide means.
The Further, as shown in FIG.
14) in the vicinity of the front end of the upper surface 16A along the left-right direction.
A second guide groove 28 is provided. 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 front end of the case 14 has a thin plate-like gas.
An id plate 36 is attached. Guide play
The shaft 36 is positioned forward of the front edge of the opening 22.
Tutter contact surface 24 (excluding the vicinity of the front edge of the opening 22)
And the shutter abutting surface
24 with a guide slit 38 as a guide means.
Forming. The guide slit 38 is a first guide.
It faces the groove 26 over its entire length. 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. As shown in detail in FIG.
The tar member 42 has a plurality of rectangular shapes.
The bellows pre as a plate-like member (six in this embodiment)
42A are connected so that they can be folded alternately in the width direction.
Configured in the unfolded state near the outer periphery.
Since the surface abuts against the shutter abutment surface 24, the opening 22 is
It can be blocked. Specifically, the shutter member 42 is adjacent to the shutter member 42.
The matching bellows plates 42A are flush with each other
Abutting adjacent bellows plates 42A in the unfolded state
Adhesive tape on the side that becomes the valley when folding
46 is attached to connect adjacent bellows plates 42A.
In each adhesive tape 46 side (each adhesive tape in the valley
Folded on the side)
The In addition, as shown in FIG.
The adhesive tape 46 affixed to the upper surface of the rate 42A is a snake
It is slightly shorter than the longitudinal dimension of the stomach plate 42A
Attached to both ends in the longitudinal direction of the bellows plate 42A.
There is no such thing. As a result, the shutter member 4
2 (the upper surface of each bellows plate 42A)
In this configuration, the butt contact surface 24 is in contact with no gap. Further, the shutter member 42 has a bellows pre-
The length of the bellows plate 42A is longer than the longitudinal dimension of the seat 42A.
A guide member formed in the shape of a long pin having a smaller diameter than the plate thickness;
The guide pin 48 is provided. Guide pin 48
Is due to the adhesive tape 46 of the plurality of bellows plates 42A.
Of the plurality of connecting portions, the shutter member 42 is folded.
Folded upwards (shutter contact surface 24 side)
Connected to the connecting portion 42B (two in this embodiment).
ing. Specifically, as shown in FIG.
The bellows plates 4 connected at 42B and adjacent to each other
The lower surface side of the 2A butting part (becomes a valley in the folded state)
The guide pin 48 is inserted into the notch 42C formed on the side).
Insert not to protrude in the thickness direction of the bellows plate 42A
In this state, the adhesive tape 46 is also applied to the guide pin 48.
Affixed. As a result, the guide pin 48 is
Prevents the rate 42A from falling off the plate thickness direction and longitudinal direction
In this state, it is held by the connecting portion 42B. In this state, the guide pin 48 has both end portions thereof.
Are respectively removed from the longitudinal ends of the bellows plate 42A.
Protruding from the rear end of the bellows plate 42A
The protruding portion 48A that protrudes is the first guide groove 26 of the case 14.
Of the bellows plate 42A.
A protrusion 48B protruding from the front end is a guide slit 38.
It is the structure inserted so that sliding is possible. A snake is attached to one end of the shutter member 42.
Narrower than belly plate 42A and bellows plate 42A
The fixing portion 44 having the same thickness is attached to the bellows pre-press by the adhesive tape 46.
Foldable along the longitudinal direction of the seat 42A.
ing. The fixing portion 44 is a shaft at the left end of the recess 20.
It is adhered to the abutment surface 24 along the front-rear direction by adhesion or the like.
Is fixed. On the other hand, the other end of the shutter member 42
An operation member 50 is connected to the. The operating member 50 is from the bellows plate 42A.
Has a connection part 52 that is long and has the same thickness as the bellows plate 42A.
It is. The connecting portion 52 is at the center in the longitudinal direction.
A bellows plate 42A which is the other end of the shutter member 42
Can be folded by the widthwise end of the tape and adhesive tape 46
It is connected. The connecting portion 52 is a shutter contact surface.
24 is slidably contacted with the bellows plate
The rear end 52A protruding from the rear end of 42A is the case 1
4 slidably inserted into the first guide groove 26 and snake
A front end 52B protruding from the front end of the abdominal plate 42A
The guide slit 38 is slidably inserted. Further, the operating member 50 has a front end 52B with a cable.
An operation portion 54 bent along the front surface 14A of the casing 14 and
And the upper end portion of the operation portion 54 extends along the upper surface 16A of the upper shell 16.
The holding part 56 bent is provided. Of the holding part 56
The end portion is a guide portion 58 bent downward, and the first portion
2 It is slidably inserted into the guide groove 28. The operation portion 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.
Other than the tension coil spring 62 locked to the right end portion of the composition chamber 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 52A is guided by the first guide groove 26 and
The front end 52B is guided by the guide slit 38, and
The guide portion 58 is guided in the second guide groove 28.
So that it slides smoothly without rattling
ing. Further, the shutter member 42 is provided with the guide pin 4.
When the eight protruding portions 48A are guided by the first guide groove 26,
Both protrusions 48B are guided by the guide slit 38,
The shutter of the case 14 in the folded state (folding process)
-Is the connecting part 42B located on the contact surface 24 side the case 14?
Without sliding away from the shutter contact surface 24
It is the structure which moves to the left. Next, the operation of this embodiment will be described.
The With the disk cartridge 10 having the above 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 at the front and rear ends.
The upper surface is contacted with the shutter contact surface 24 and the opening 22
Is blocked. 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 The operation portion 5 of the operation member 50 is accompanied with this loading.
The right end surface of 4 is related to the opening / closing member (not shown) of the drive device.
It is pushed to the left while being combined. Then, the operation member 50
Slide to the left against the biasing force of the tension coil spring 62.
And the connecting portion 52 is fixed to the case 14.
44. As a result, the shutter member 42
Opening 22 while folding each bellows plate 42A alternately
Open. At this time, as shown in FIGS. 5 and 6,
Protruding portion 48A of guide pin 48 and rear end portion of connecting portion 52
52A is respectively guided (guided) into the first guide groove 26.
And the projecting portion 48B of the guide pin 48 and the connecting portion.
The front end portions 52B of the 52 are respectively inserted into the guide slits 38.
Each connecting portion 42 of the shutter member 42 is guided (guided).
B slides left and right with the shutter contact surface 24
Moving. 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 above leftward movement is restricted and the drive device
The opening / closing member is a right end surface of the operation portion 54 (operation member 50).
By maintaining the engagement, the open state of the opening 22 is maintained.
(The operation member 50 is held by the opening / 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. At this time, as with the closing of the opening 22, the guide
The pin 48 and the connecting portion 52 are connected to the first guide groove 26 and the guide
Move to the right while being guided by the id slit 38
The Here, the shutter member 42 has the opening 22.
When opening and closing the shutter, the shutter contacts in the folded state
Two locations that are in contact with the surface 24 (located on the case 14 side)
The guide pin 48 provided in the connecting portion 42B is connected to the case 1
4 first guide groove 26 and guide slit 38
Since it is guided along the folding direction, the shutter part
The material 42 has an intermediate portion at the time of opening and closing the opening 22 (particularly the opening 2
2), without leaving the case 14
Works reliably and reliably. That is, the shutter member 42
The two end portions of the connecting portion 42B are the shutter contact surfaces.
24 (surface around the opening 22) while sliding the opening securely
Close. Further, as described above, the shutter member 42 is connected.
Only the both ends of the connecting portion 42B slide on the shutter contact surface 24.
In order to open and close the opening 22,
The sliding (contact) area with the case 14 is extremely small. this
Therefore, the sliding between the case 14 and the shutter member 42 is accompanied.
The generation of wear powder can be suppressed or prevented. Furthermore, one end of the cable is fixed at the fixing portion 44.
The bellows-like shutter member 42 fixed to the sleeve 14 is folded.
In other words, in order to open the opening 22,
Shutter 40 which is a sliding part of the motor 40 and the case 14
The contact surface 24 is not damaged when the disk cartridge 10 is stored.
By the utter 40 (the shutter member 42 and the connecting portion 52)
So that dust etc. adhere to the sliding part.
There is nothing to do. As a result, the opening / closing of the opening 22
Out of case 14 due to sliding of cutter 40 and case 14
Dust adhering to the surface enters the case 14 through the opening 22
Is prevented. As described above, the disk according to the present embodiment.
In the cartridge 10, the shutter 40 (shutter portion
The sliding area between the material 42) and the case 14 is small, and the dustproofness is better.
The shutter member 42 reliably opens and closes the opening 22
To do. The shutter member 42 is simply adjacent.
When folded with the bellows plate 42A in contact
Adhesive tape 46 is affixed to the valley side and connected (connected).
The structure is simple because of the configuration. In addition, guy
Playing bellows where dopin 48 is adjacent in connecting part 42B
The adhesive tape 4 is arranged in the notch 42C between the grooves 42A.
6 to prevent the shutter member 42 from falling off
Therefore, the shutter member 42 has a simple structure.
Guide pins 48 can be provided. Furthermore, 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. In the above embodiment, the shutter
The left and right sides of the opening 22 that is both ends of the member 42 in the folding direction
The shutter contact surface 24 is formed on both sides.
However, the present invention is not limited to this, and the shutter contact surface 24
Is the direction intersecting the folding direction of the shutter member 42
If it is provided at the edge (outer edge of the front and rear of the opening 22)
The center part in the longitudinal direction of the fixing part 44 and the connecting part 52 is
It is good also as a structure which does not contact | abut on the utter contact surface 24. Ma
In addition, the opening 22 is limited to a preferable configuration formed in the recess 20.
It goes without saying that it is not fixed. In the above embodiment, the shutter
A plurality of bellows plates 42A constituting the member 42 are folded.
With adhesive tape 46 attached to the valley side
Are connected in such a way that they can be folded alternately.
Akira is not limited to this, for example, each bellows plate 42A
Sticking to the side that becomes a mountain in the stacked state of each other
The adhesive tape 46 may be connected by a tape 46.
Instead of folding by ultrasonic welding or hinge structure etc.
You may connect so that folding is possible. Also, the adhesive tape 46
Prevents gaps with the shutter contact surface 24 due to thickness
In order to prevent this, the adhesive tape 46 is not affixed to both ends of the upper surface.
For example, instead of the configuration, the adhesive tape 46 is a bellows play.
It is good also as a structure stuck on the recessed part provided in 42 A of G. Next, a first modification of the above embodiment, a second
About disc cartridges 70 and 80 according to modifications
Description will be made based on FIGS. 7A and 7B, respectively.
In addition, basically the same parts and parts as the above embodiment
The same reference numerals as those in the above embodiment are used for the explanation.
I will omit the description. FIG. 7A shows a disc according to the first modification.
A sectional view of the cartridge 70 is shown. In this figure
As shown, the disc cartridge 70 has a case.
An opening 72 that opens on the lower surface 18A of the shutter 14 is a shutter.
It can be opened and closed by -40. Opening 72
Is formed in a rectangular shape in plan view surrounded by the peripheral wall 74.
The disc media 12 is received at the bottom (upper)
A window communicating with the space where the disk media 12 cannot pass
It has a portion 72A. The case 14 has the first guide groove 26 and the case 14.
Instead of the guide slit 38, the circumference defining the opening 72
Left and right near the lower end of the peripheral wall 74A before and after the wall 74
A pair of front and rear guides as guide means provided along the direction
Id groove 76 (the front peripheral wall 74A and the guide groove 76 are not shown)
Abbreviation). On the other hand, the shutter 40 is a shutter member.
Instead of 42, a shutter member 78 is provided. Shatter
The plurality of snake members 78 (ten in the first modification) are snakes.
Belly plates 78A are connected to each other so that they can be folded alternately.
It is formed in the shape of a belly and the front and back of each bellows plate 78A
The end surfaces are slidably contacted with the front and rear peripheral walls 74A.
Thereby, the shutter member 78 slides with the peripheral wall 74A.
However, it can be folded or unfolded.
In the unfolded state, the upper end portions of each bellows plate 78A are
It is the structure which does not contact | Further, the shutter member 78 is a snake adjacent to each other.
A plurality of reams to which the belly plate 78A is foldably connected
Of the knots, the folds are folded in a convex manner downward.
Gaps arranged at the tie 78B (four places in the present embodiment)
An id pin 48 is provided. The fixing portion 44 of the shutter 40 is a case.
For bonding to the lower end of the left edge of the opening 72 (circumferential wall 74)
Therefore, it is fixed. And before and after the guide pin 48
Projecting end and front and rear of the connection part 52 (operation member 50)
The end portions are formed in a pair of front and rear guide grooves 76 of the case 14, respectively.
It is the structure inserted so that sliding (guide) is possible. Note that
When the cutter member 78 is unfolded, it passes through the guide groove 76.
In order to prevent the entry of dust and the like into the case 14,
Dimensions, arrangement, etc. are determined. In the disk cartridge 70 having this configuration,
However, the shutter member 78 is guided when the opening 72 is opened and closed.
The pin 48 is guided in the guide groove 76 to make sure
And the disk cartridge 10 according to the above embodiment
The same effect can be obtained. The following is the disk cartridge
An effect (action) different from 10 will be described. In the disk cartridge 70, the shutter
The member 78 is in contact with and away from the fixed portion 44 by the operation member 50.
Front and rear end faces (both ends in the direction perpendicular to the folding direction)
Folding or unfolding while sliding the surface) with the peripheral wall 74A
In order to open and close the opening 72, a shutter member 78 and
The sliding area with the case 14 is extremely small.
Suppresses the generation of abrasion powder due to sliding with the shutter member 78
Or it can be prevented. In addition, the peripheral wall 74A closes the opening 72.
Because it is not exposed to the outside when it is closed, dust, etc. will adhere to it.
Nor. Further, in the disk cartridge 70,
The connecting portion 78B of the shutter member 78 is the lower end of the case 14.
The opening 7 is guided by a guide groove 76 provided in the vicinity.
Folded with the opening 72 open to open and close 2
The shutter member 78 protrudes from the lower surface 18A of the case 14.
There is no out. For this reason, the drive device can be made thinner.
Figured. On the other hand, FIG. 7B shows a second modification.
A cross-sectional view of the disk cartridge 80 is shown. This
As shown in the figure, the disk cartridge 80 is
Instead of the id groove 76, the height (vertical) direction of the peripheral wall 74A
Guide means provided along the left-right direction at the center
In the point that it has a pair of front and rear guide grooves 82 as
This is different from the disk cartridge 70. The shutter 40 is a shutter member.
Instead of 78, a shutter member 84 is provided. Shatter
There are a plurality of (9 in the second modified example) bellows member 84
Plate 84A and bellows plate 84B located at both ends
Are connected to each other so that they can be folded together to form a bellows
The width of the bellows plate 84B is the bellows plate 84.
It is approximately half the width dimension of A. Each bellows plate 84
A penetrates in the longitudinal direction at the center in the width direction
A guide pin 48 is provided. This shutter 40 has a fixed portion 44 opened.
Bonded to the center in the height direction of the peripheral wall 74 at the left edge of 72
Etc. and each bellows plate 84A, 8
4B front and rear end face can slide on front and rear peripheral wall 74A
Ends protruding front and rear of each guide pin 48 in the contact state
And the front and rear ends of the connection part 52 (operation member 50)
Slide into the pair of front and rear guide grooves 82 of the case 14 (Guide
D) It is a configuration that can be inserted. For example, Guy
The width dimension of the groove 82 is the plate of each bellows plate 84A, 84B.
By making it smaller than the thickness, it passed through the guide groove 82.
Intrusion of dust or the like into the case 14 is prevented. In the disk cartridge 80 having this configuration,
However, the shutter member 84 is guided when the opening 72 is opened and closed.
The pin 48 is guided in the guide groove 82, so
The disk cartridge 1 according to the above embodiment
0, similar to the disk cartridge 70 according to the first modification
The effect is obtained. The disk cartridge according to the present invention
Is limited to the above disk cartridges 10, 70, 80
The above-mentioned disc cartridges 10 etc.
It can be said that these components may be combined as appropriate.
Needless to say. Thus, for example, the disc cartridge
The bellows plate constituting the shutter member 42 of the wedge 10
Increase the number of 42A, shutter in the folded state
Configuration in which member 42 does not protrude from lower surface 18A of case 14
It is also good. Further, in the above embodiment and each modified example,
Are all connecting parts 42B, 78B or all bellows pre-
Preferred configuration in which guide pins 48 are provided on the guide 84A.
However, the present invention is not limited to this, and the shutter member
42 etc. have at least one guide pin 48
It ’s fine. Further, the guide pin 48 is connected to the connecting portion 42B and the bellows.
Limited to the configuration provided in the center in the width direction of the plate 84A
For example, the guide pin 48 is connected to the connecting portion 4.
Thick part of bellows plate 42A etc. in the vicinity of 2B etc.
You may arrange | position in the long hole etc. which were formed in this. In addition, this departure
Akira has a configuration including a guide pin 48 as a guide member.
For example, instead of the guide pin 48, the bellows
Separately installed at both ends of plate 42A (connecting part 42B)
It is good also as a structure provided with the taken guide member. Furthermore, the present invention provides shutter members 42 and 7.
8 and 84, bellows plates 42A, 78A, 84
It is not limited to the number of A, but it can be folded.
The tab member 42 and the like are used for opening and closing the opening 22 and the like stably.
A guide pin 48 (guide member) is sufficient.
Therefore, the shutter member 42 and the like have two or more bellows plates.
It may be configured with a rate 42A or the like (folded alternately)
Even if the plate-like member to be folded includes the fixing portion 44 and the connecting portion 52
good). Furthermore, the above-described embodiment and modifications
In the example, the guide pin 48 has protrusions 48A and 48B (bellows)
Front and rear ends protruding from the longitudinal rear end of the plate 78A, etc.
1) as the guide means at two locations
Guide groove 26, guide slit 38, or a pair of front and rear
Preferred configuration guided by guide grooves 76 and 82
However, the present invention is not limited to this. For example, the guide
Pin 48 has only one of protrusions 48A and 48B
1st guide groove 26 or guide slit 38
Configuration guided by one guide groove 76 or the like)
It is also good. Further, for example, the protruding portion of the guide pin 48
The dimensions of 48A and 48B are the same as those of the first guide groove 26 and guide sleeve.
Corresponding to the vertical width (plate thickness of the connecting portion 52)
It is also possible to enlarge and improve the guide property. Further, in the above embodiment and each modification,
Is the folding direction of the shutter members 42, 78, 84
(Moving direction of the operation member 50) is how to load the drive device
Direction (direction opposite to arrow C direction) perpendicular to direction (arrow A direction)
However, the present invention is not limited to this,
For example, the folding direction of the shutter member 42 or the like is indicated by an arrow A.
It is good also as a structure which is a direction opposite to a direction. In this configuration
This simplifies the opening / closing structure of the opening 22 of the drive device. Furthermore, in the above embodiment and each modification,
The other end of the shutter member 42, 78, 84 is a fixed part
The structure provided with the operation member 50 for contacting / separating with respect to 44
However, the present invention is not limited to the structure of the operation member.
The other end of the shutter member 42 or the like is fixed by any structure.
Needless to say, the fixed portion 44 may be contacted or separated.
Yes. Further, the shutter member 42 and the like are interposed via the fixing portion 44.
The structure fixed to the case 14 is not limited, and the adhesive tape
Folded with respect to case 14 by loop 46 or hinge structure
It may be directly attached so that it can be folded. Furthermore, the above-described embodiment and modifications
In the example, when the opening 22 is closed, the shutter member 42,
78, 84 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 opening 72.
The adjacent bellows plates 42A are inclined with respect to each other.
The opening 22 or the like may be closed in the state. Further, in the above embodiment and each modification,
The disc media 12 is a single-sided recording type and is open.
The openings 22 and 72 are provided on the lower side of the case 14.
However, the present invention is not limited to this.
The media 12 is a double-sided recording type and the opening 22 etc. are also on the upper side.
Shutter member that opens and closes the upper and lower openings as provided
42 etc. (shutter 40) can be arranged respectively.
Noh. As described above, the disk according to the present invention is displayed.
The cartridge is a sliding surface between the shutter member and the case.
Less dust and improved dust resistance, and shutter member is open
Has an excellent effect of reliably opening and closing.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an external view of a disk cartridge according to an embodiment of the present invention as viewed from below, (A) is a perspective view showing a closed state of an opening, (B). FIG. 3 is a perspective view showing an open state of the opening. FIG. 2 is a cross-sectional view taken along line 2-2 of FIG. FIG. 3 is a view showing a shutter member constituting the disk cartridge according to the embodiment of the invention, and FIG.
Is a perspective view showing the entire configuration of the shutter member, (B) is an enlarged perspective view showing a connecting structure of the shutter member. 4A and 4B are views showing a guide pin mounting structure to a shutter member constituting the disk cartridge according to the embodiment of the present invention, wherein FIG. 4A is a front view showing a substantially unfolded state of a connecting portion; ) Is a front view showing a substantially folded state of the connecting portion. FIG. 5 is a partially cutaway perspective view showing the opening process of the opening of the disk cartridge according to the embodiment of the present invention. 6 is a cross-sectional view taken along line 6-6 of FIG. 7A is a cross-sectional view showing a disk cartridge according to a first modification of the embodiment of the present invention, and FIG. 7B is a cross-sectional view showing a disk cartridge according to the second modification of the embodiment of the present invention. It is. 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 26 First guide groove (guide means) 38 Guide slit (guide means) 42 Shutter member 42A Bellows plate (plate member) 48 Guide pin (guide member) 70 80 Disc cartridge 72 Opening 76, 82 Guide groove (guide means) 78, 84 Shutter members 78A, 84A, 84B Bellows plate (plate-like member)

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 shutter member that is foldably connected and has one end in the folding direction fixed to the case, the other end contacting and separating from the one end and opening and closing the opening; and the plate-like member and the folding direction A disc cartridge comprising: a guide member provided so as to protrude from an end portion in a direction orthogonal to each other; and guide means provided on the case for guiding the guide member along the folding direction.