JP2003091957A - Disk cartridge - Google Patents

Abstract

PROBLEM TO BE SOLVED: To energize a pair of shutter members respectively corresponding to the front and rear surfaces of a recording disk to a closing position side by using a single spring member having a simple structure. SOLUTION: A spring member 20 has a portion at a base end side in the shape of a straight line bordering on a large loop part 98, and a region where the straight portion and a symmetry axis J1 intersect forms the center point CP of the spring member 20. The spring member 20 is provided with a pair of energization arms 102 extending at both sides from the center point CP along the width direction of a disk cartridge 12. The spring member 20 locks a pair of shutter members 16, respectively by using hook parts 106 formed at the tip pars of the energization arms 102. When one of the shutter members 16 is opened or closed, only the energization arm 102 which has locked the shutter member 16 is elastically deformed within a spring housing part 54 according to movement along the opening/closing direction of the shutter members 16.

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is an information recording medium.
All recording discs are stored in a cartridge case.
The present invention relates to a disk cartridge. [0002] So-called 3.5 inch flexible devices
Disc cassettes such as discs (FD) and minidiscs (MD)
In a cartridge, a recording disk as an information recording medium is used.
The disc is stored in the cartridge case
When recording or reading information on the cartridge,
From the case window, the disk drive device
It is called “drive device”. ) In the recording part and reading part
Access to the recording disk. Also,
The cartridge case has a shutter member.
If the drive unit is not installed,
The tar member is in the closed position and closes the window. So
If necessary, this shutter member can be
Driven to the open position
The window is opened. Such a drive unit
Examples of the ter opening / closing mechanism include a pin shape or a plate.
The shutter opening / closing lever formed in the shape of a shutter member
And engage the shutter release lever with the shutter
Move along the material opening and closing direction to open the shutter member.
Some are released or closed. By the way, in recent years, mobile phones such as mobile phones have been developed.
Small disk cartridges, assuming that
Development is underway. Disc cart like this
Of course, in Ridge, the cartridge case is also downsized.
Because of this, small parts of various parts stored in the cartridge case
There is a strong demand to reduce the number of parts and the number of parts.
In order to maximize the amount of information stored per disc,
The front and back sides of the recording disk should be used as information recording surfaces.
May be required. Such a disc cartridge
In general, the front and back surfaces of the cartridge case
Each window is formed and a window that opens and closes the window.
The cutter member is on the front and back sides of the cartridge case
Respectively. Therefore, inside the cartridge case
To prevent the pair of shutter members from being accidentally opened
Prevent and from disk cartridge drive device
Shutter member that was in the open position when discharging
Each of the pair of shutter members
It is necessary to provide a spring member that biases toward the closed position. [0004] However, the cart
A pair of shutter members are closed inside the ridge case.
Provide an independent pair of spring members to bias the position side
Trying to make these spring members very small
It is necessary to It is difficult to manufacture such a small spring member.
In addition, the manufacturing cost increases, and even smaller spring members are
Assembling securely at a predetermined position in the cartridge case
It will be difficult. The object of the present invention is to record in consideration of the above facts.
A pair of shutters corresponding to the front and back of the disc
Each member is closed by a single spring member with simple structure
To provide a disk cartridge that can be biased to the position side
It is in. [0006] A disk cassette according to the present invention is provided.
According to the cartridge, the shutter inside the cartridge case
-It is provided so as to extend along the opening and closing direction of the member.
Extending from near the center to both sides along the opening and closing direction
A pair of biasing arms can be elastically deformed along the opening and closing direction
The spring member has a pair of biasing springs.
The pair of shutter members are respectively closed by the
And one shutter member is in the closed position.
One shutter as you move from the
Only one urging arm corresponding to the member along the opening / closing direction
By elastically deforming, a single spring member
A pair arranged on the front and back sides of the cartridge case
Each of the shutter members can be urged toward the closed position
And a pair of shutter members respectively corresponding to the pair of shutter members.
Compared to the case where the spring member is provided individually, the spring member itself
It is possible to increase the size, and into the cartridge case
Assembling work of the spring member is simplified. DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a data processing device according to an embodiment of the present invention will be described.
The disk cartridge will be described with reference to the drawings (Configuration of Embodiment) FIGS. 1 to 10 show an embodiment of the present invention.
The disc cartridge 12 according to the state is shown. Na
In these drawings, arrow FR, arrow RE, arrow
UP, arrow DW, arrow RI, and arrow LE are respectively
To the disk drive device of the disk cartridge 12
The front of the disk cartridge 12 with respect to the insertion direction
Direction (loading direction), backward direction, upward direction, downward direction, right direction, and
The left direction is shown. As shown in FIG. 2, the disc cartridge
The wedge 12 includes a pair of shell members 14 and these shells.
A pair of shutters provided corresponding to each of the members 14.
Common to the shutter member 16 and the pair of shutter members 16
One lock member 18 and one bar provided
A net member 20 is provided. The pair of shell members 14 have the same shape.
It is formed in a substantially rectangular plate shape in plan view. This
The front and rear dimensions of the shell member 14 are slightly larger than the left and right dimensions.
The disk cartridge 12 is
Eve device is accidentally inserted along the width direction (left-right direction)
There is no such thing. Further, the shell member 14 includes
A circular hole 26 and a long hole 28 for positioning are provided at predetermined positions.
Formed in the drive device.
And a reference pin (not shown) of the drive device is inserted into the long hole 28.
The disk cartridge 12 is positioned by being inserted.
Is done. Slightly rearward from the approximate center of the shell member 14
In the position shifted to the side, the disk-shaped recording disk 22 is
A corresponding disk storage portion 24 is formed. A pair of
One shell member so that the disk storage portion 24 faces
14 around the axis of symmetry J1 with respect to the other shell member 14
By overlapping in a rotated (inverted) state,
As shown, the cartridge housing the recording disk 22
A wedge case 30 is configured. Further, the shell member 14
On the surface is a pair of bosses 32, 34 as shown in FIG.
Is erected. Also, it is symmetric with respect to the symmetry axis J1.
The fitting holes corresponding to the bosses 32 and 34 respectively
36 and 38 are formed. A pair of shell members 14
The bosses 32 and 34 corresponding to each other in the superimposed state.
Is fitted into the fitting holes 36, 38, the shell member 14 is
It is maintained in a superposed state and will not be separated inadvertently. The shell member 14 is connected to the recording disk 22.
A window 44 for access is formed. disk
With the cartridge 12 loaded in the drive device
Passes through this window 44 and the spindle of the drive device
The recording disk 2 inserted into the cartridge case 30
2 to the center hub 46 and the drive device
Recording / reproducing head can access the recording disk 22
become. The disk cartridge according to this embodiment
12, the front and back surfaces of the recording disk 22 are respectively for information.
The recording surface is capable of recording and reproduction. Further, at the center of the front edge side of the shell member 14
Is thinned partially from the inner surface to the outer surface.
A meat part 50 is formed. As shown in FIG.
Cartridge case with overlapping shell members 14
30 is formed on the front end surface of the cartridge case 30.
Is a slit-like insertion opening 52 extending along the width direction.
Is formed, and the spring is accommodated inside the insertion opening 52.
A storage unit 54 is configured. The spring housing 54 has a metal
The spring member 20 (see FIG. 2) formed from the strand is accommodated.
It is. As shown in FIG.
Are at the both ends of the front edge side with respect to the thin-walled portion 50, respectively.
Guide protrusions 56 and 58 that protrude slightly forward are formed.
ing. One of the guide protrusions 56, 58
The id convex portion 56 is slightly thinner than the thin portion 50.
The thickness of the guide protrusion 56 is increased along the thickness direction.
The guide surface 57 that is the inner surface is flat.
The The other guide convex portion 58 of the shell member 14 is also provided.
Is paired from the outer edge to the inner edge.
Inclined to approach the guide projection 56 of the shell member 14
The guide surface 59 is formed. The cartridge case 30 faces each other.
Between the guide surface 57 and the guide surface 59
Extends from both ends of the front end surface of the case 30 to the center side.
A guide groove 60 is formed. In this guide groove 60
The opening end 61 on the outer side in the width direction is a drive
The opening / closing lever of the opening / closing lever 128 is located in the width direction
The inner end communicates with the insertion opening 52. As shown in FIG.
The outer surfaces of the pair of shell members 14 constituting the sleeve 30 are
A thin plate-like shutter member 16 is arranged.
The shutter member 16 has a size capable of closing the window portion 44.
Shutter body portion 66 and the shutter body portion
A shutter guide 68 extending from the front end of 66
Are formed in a substantially L shape. Shutter
A contact piece 70 standing up at a substantially right angle from the id portion 68 is erected.
Further, from the end of the contact piece 70, the shutter guide
Two guide pieces 72 and 74 are formed in parallel with the portion 68.
The The shutter member 16 is at a predetermined position on the shell member 14.
When placed, the contact piece 70 is thin on the shell member 14.
It contacts the front edge portion 51 of the meat portion 50, and further guide pieces 72, 7
4 is the opposite side of the shutter guide portion 68 from the thin portion 50.
Turn to. As a result, the shell member of the shutter member 16
Dropping from 14 and rattling are prevented. As shown in FIG. 2, the shutter body portion
From the vicinity of the rear end of 66, it is the same direction as the shutter guide 68.
Extended to the right and further perpendicular to the shutter body 66
And the tip of the shutter body 66 is
A guide piece 76 that is bent in parallel with the guide piece 76 is formed. Sha
The shutter member 16 has a shutter along the width direction.
A guide hole 78 penetrating the member 16 in the thickness direction is formed.
The guide piece 76 is inserted into the guide hole 78 (FIG. 1).
reference). Also by this, the shell of the shutter member 16
Omission from the member 14 and rattling are prevented. The shutter member 16 has a shutter shown in FIG.
The main body portion 66 closes the window portion 44 of the shell member 14.
From the closed position (closed position), the window 44 shown in FIG.
Guide piece 72 between the fully open position (open position)
It is possible to slide while being guided by 74 and 76.
ing. A shutter is provided on the outer surface of the shell member 14.
A recess 82 corresponding to the movement region of the member 16 is formed.
The shutter member 16 extends from the shell member 14 in the thickness direction.
It does not protrude (upward or downward). As shown in FIGS. 1 and 2, the shutter
-From the vicinity of the tip of the shutter guide portion 68 of the member 16
Is in the same plane as the contact piece 70, so that the pressing piece 8
0 is erected. Protrusion length of pressing piece 80 (shutter
The length in the vertical direction (measured in the thickness direction of the guide portion 68) is
It is made longer than the protrusion length of the touch piece 70, and the pressing piece 80 is
It is supported so as to face the insertion opening 52. here
Thus, the outer end surface portion of the pressing piece 80 is the shutter member 1.
6 being pressed by the opening / closing lever 128 when opening / closing
The pressed portion 81 is a portion 81 shown in FIG.
As shown in FIG.
It is inclined outward in the width direction. This opens and closes the lever
-128 acts on the pressed part 81 with the pressing force along the width direction
Then, the opening / closing lever 128 moves to the base side of the pressing piece 80.
The component force that acts is a reaction force from the pressed portion 81. As shown in FIG. 2 and FIG.
Between the shell members 14, a metal plate such as a stainless steel plate is predetermined.
A robot constructed by processing (bending, etc.) at a position.
The hook member 18 is arranged. The lock member 18 has a width
Formed by bending a metal plate in multiple layers at the center in the direction
Spring part 84 and the upper and lower ends of the spring part 84
, The rotation portions 86 extending leftward and rightward, respectively.
And viewed along the axis of symmetry J1.
Then, it has a line-symmetric shape. The rotating portion 86 has a spring
A shaft support hole 88 is formed in the vicinity of the portion 84, and the shell
A pivot pin erected from the inner surface (thin wall portion 50) of the member 14
90 is inserted. Each of the rotating parts 86 is pivotally supported.
It rotates independently around the center 90, but with this rotation
Because the spring part 84 is deformed, the
Sexual force acts on the rotation part 86. From the central portion in the longitudinal direction of the rotating portion 86, the front
The lock convex part 92 which protrudes toward the direction is formed
The On the other hand, the contact piece 70 is partly provided on the shutter member 16.
Thus, a lock recess 94 is formed. Figure
As shown in FIG. 4, the shutter member 16 is in the closed position.
In some cases, the locking projection 92 engages with the locking recess 94.
Therefore, the movement of the shutter member 16 is restricted, and the shutter
Tutter member 16 is locked in the closed position. Against this
Then, as shown in FIG.
About the lock projection 92
When the engagement with the lock recess 94 is released, the shutter portion
The material 16 is also unlocked and can move towards the open position
It becomes. In addition, each rotation part 86 is independently rotated.
In order to work, one rotating part 86 rotates in the unlocking direction.
When it moves, the other rotating part 86 rotates in the unlocking direction.
It does not move, and the lock projection 9 corresponding to this
2 also maintains the engaged state with the lock recess 94. As shown in FIG. 2 and FIG.
6, a pressed piece 96 is formed at the tip of the insertion opening 52.
Inside, wider than the pressing piece 80 of the shutter member 16
Projects outward. The pressed piece 96 is a disc car.
From the widthwise outer side of the bridge 12 toward the widthwise center side
Inclined forward. As shown in FIG. 2 and FIG.
As described above, in the spring storage portion 54 of the wedge case 30
The spring member 20 is housed in the housing. This spring member 20
As a whole, along the width direction of the cartridge case 30
The spring member 20 is formed in an elongated and substantially C-shape.
The opening formed between the pair of tip ends in the cartridge
The wedge case 30 is open toward the front. Spring member 20
At both ends along the longitudinal direction of the
A large loop portion 98 is formed by winding it in a loop shape.
In the middle portion between the large loop portion 98 and the tip of the spring member 20
Is a small loop portion 10 wound with a smaller diameter than the large loop portion 98.
0 is formed. Here, the spring member 20 has an axis of symmetry.
When viewed along the line J1, the shape is axisymmetric, and the axis of symmetry
When rotated around the line J1, the rotated spring member 20 rotates.
It completely coincides with the spring member 20 before rolling. As shown in FIG. 4, the spring member 20 is
The base end side of the large loop 98 is a straight line.
Where this linear part intersects the axis of symmetry J1
The position is the center point CP of the spring member 20. Spring member
20, along the width direction of the disk cartridge 12.
A pair of urging arms extending from the center point CP to both sides
102 is provided. These biasing arms 10
2 is a straight line from the center point CP to the large loop part 98
Spring portion from the large loop portion 98.
The part up to the tip of 20 is the swing part 104
The The swing portion 104 includes a large loop portion 98 and a small loop.
Straight line between loop part 100 and small loop part 100 tip side
The straight part of the swing part 104 and the bending
The groove 103 is not elastically deformed in the spring member 20.
In a free state, they are substantially parallel to each other. Here, the large loop section 98 and the small loop section 10
0 is the axial center LL, LS (see FIG. 9A)
It is possible to elastically deform in the twist direction, and this twist direction
Compared with the large loop part 98, the rigidity in the small loop part
100 is larger. The swing unit 104 is
The loop portions 98 and 100 are elastically deformed in the twisting direction.
And swinging around the elastically deformed loop portions 98 and 100.
Move. As shown in FIG. 9, the spring member 20 has
Each pair of swing parts 104 has a gold
The element wire is bent upward and downward at a substantially right angle to hook
A portion 106 is formed. On the other hand, the shutter member 16
As shown in FIG.
Recessed at the end of the cutter guide 86 opposite to the extending direction
A spring receiving portion 108 is formed. This spring receiver
108, the end of the guide piece 72 is cut out in a substantially V-shape.
The depth along the width direction of the spring member 2 is formed.
It is longer than the radius of the metal wire constituting zero. The spring receiving portion 10 in the shutter member 16
8 is a bar assembled to the cartridge case 30.
One hook portion 106 of the member 20 is inserted
The At this time, one biasing arm in the spring member 20
Reference numeral 102 denotes a shutter connected via a hook portion 106.
-The member 16 is urged toward the closed position. Also shown in Figure 1
The spring member 20 and the cartridge case 30 are
With the shutter members 16 assembled,
The guide piece 72 and the hook portion 106 are shutter members.
16 is shielded by the vicinity of the tip of the cartridge case,
It will not be visible from the outside. Here, when the spring member 20 is in a free state.
The distance DF between the pair of hook portions 106 (see FIG. 9)
A pair of shutter members 1 in the cartridge case 30
Between the spring catches 108 when both 6 are in the closed position
It is shorter than the interval DS. Therefore, a pair of shutters
When both of the spring members 16 are in the closed position, the spring member 2
0 indicates that the distance DF between the pair of hook portions 106 slightly increases.
Elastically deformed so that the pair of shutter members 16
Thus, a restoring force directed toward the closing direction is applied. this
From the state, one shutter member 16 in the closed position is
When moved to the open position side, the hook portion 106 is moved to the spring receiving portion.
108 along the width direction.
In the spring member 20 that locks the shutter member 16
One biasing arm 102 is elastically deformed along the width direction.
The As shown in FIG. 2, the shell member 14 has
In the thin portion 50, a guide groove 110 penetrating in the thickness direction is formed.
It is made. The guide groove 110 extends along the width direction.
It is formed in a slit shape and the tip side of the hook part 106
(Further ahead of the portion engaged with the spring receiving portion 108
(End side) part is inserted. As a result, the spring member
20 hook portions 106 open and close the shutter member 16
It is guided to move along. This makes the spring
The movement direction of the hook portion 106 of the member 20 is limited to the width direction.
As a result, the biasing arm 102 changes only in a predetermined direction.
The deformation direction is limited to form, and the shutter part
Shaking of the material 16 in the front-rear direction is also prevented. Na
The guide groove 110 does not necessarily pass through the thin portion 50.
It is not necessary, deeper than the length of the insertion part of the hook part 106
If possible, it will be formed in a concave shape on the inner surface of the thin portion 50.
You can do it. As shown in FIG. 9, the spring member 20
Then, the pair of swing portions 104 is moved from the large loop portion 98 to the
Inclined upward and downward toward the hook portion 106
It is formed as follows. As a result, the spring member 20
When in the free state, the pair of swing parts 104
The distance DT between the tip portions along the vertical direction is determined by the cartridge case.
A pair of shutter members 16 assembled to the case 30
Slightly wider than the spacing between the guide pieces 72
The Accordingly, the spring housing portion 54 of the cartridge case 30 is used.
The spring member 20 housed inside is a pair of hook portions 106.
In a state where the pair of guide pieces 72 are respectively locked by
The distance between the tips of the pair of swing parts 104 is along the vertical direction.
A pair of swing parts that are elastically deformed toward each other
104 pushes the pair of guide pieces 72 upward and downward, respectively.
Press. As a result, it is bent from the tip of the swing part 104.
The hook portion 106 is inserted into the guide groove 110
The hook portion 106 is detached from the guide groove 110.
Drop is prevented. In the spring member 20, as described above,
By tilting the pair of swing parts 104,
Set the interval DT between the tips of the swing part 104
But tilting the swing part 104 in this way
Instead, along the vertical direction between the winding portions of the large loop portion 98
To form a gap and adjust the width of the gap accordingly.
Thus, the interval DT between the tip parts of the swing part 104 is set.
You may make it do. Further, the foot of the spring member 20 is
The center portion 106 is formed by whether the metal strand is the tip of the swing portion 104.
This hook part is bent at a substantially right angle.
U-shaped and V-shaped with 106 open to the tip side
Bends up and down when the guide piece 72 is locked
It is good also as a shape where the movement of a direction is restrict | limited. As shown in FIG.
Defines the spring storage portion 54 and the disk storage portion 24.
The outer side in the width direction of the partition wall 112 and the spring storage portion 54 is closed.
Side walls 114 are respectively formed. The partition 112 is
Curved along the outer periphery of the recording disc 22,
The side wall 114 extends along the front-rear direction of the cartridge case 30.
It is extended. Here, the partition wall 112 is one of the shafts.
When the tatter member 16 moves from the closed position to the open position side
In addition, as shown in FIG.
The bending deformation of the bending portion 103 is caused by the contact of the loop portion 98.
It functions as a limiting stopper, and the side wall 114 is
As shown in FIG. 8, a small loop in the spring member 20
The swinging of the swing part 104 is restricted by the contact of the part 100
Functions as a stopper. (Operation of Embodiment) Next, the structure is as described above.
Of the disc cartridge 12 according to this embodiment formed
The operation will be described. The disk cartridge 12 is a drive device.
When installing the disc cartridge 12 in the front-rear direction
Drive device cartridge holder (not shown)
(Omitted) Insert in. Disc cartridge 12 is cart
Inserted into the ridge holder and reaches the specified mounting position
And a circular hole 26 and a long hole 28 of the disk cartridge 12.
A pair of reference pins provided in the drive device
Insert the disc cartridge 12 into the mounting position.
It becomes a specified state. The shutter opening / closing mechanism of the drive device is
When the disk cartridge 12 is inserted into the loading position,
The open / close lever 128 formed in the shape of a
Waiting position on the outer side in the width direction with respect to the disk cartridge 12
From the shutter release position (see Fig. 8) side (see Fig. 4)
Move. As a result, the end of the opening / closing lever 128 is
Guide groove provided at the front edge of the cartridge case 30
It moves into the insertion opening 52 through 60. Insertion opening 5
The opening / closing lever 128 that has moved into position 2 is locked at its tip.
The pressed member 96 is brought into contact with the pressed piece 96. Further opening and closing
When the bar 128 moves to the shutter opening position side, FIG.
As shown, the pressed piece 96 of the lock member 18 is
The rotating portion 86 resists the elastic force of the spring portion 84.
The lock projection 92 is rotated in the unlocking direction.
The shutter member 16 is locked
Canceled. The opening / closing lever 128 is further moved in the insertion opening 52.
When moving to the shutter open position side, the shutter member
16 abuts against the pressed portion 81 of the pressing piece 80 and presses
The shutter is pressed by pressing the shutter member 16 through the piece 80.
-Slide the member 16 from the closed position to the open position.
The At this time, the shutter member 16 is moved to the spring member 20.
One of the biasing arms 102 is gradually elastically deformed.
Slide to the shutter release position side. Drive equipment
As shown in FIG.
When you move to the indicated shutter release position,
-128 stops moving. The shutter member 16 is opened from the closed position.
When moving to the position side, the spring member via the guide piece 72
20 along one of the urging arms 102 in the width direction.
Press outward. The operation of the spring member 20 at this time will be described.
First, the shutter member 16 is moved from the closed position.
Immediately after the start, as shown in FIG.
Deflection of the urging arm 102 that locks the shutter member 16
The part 103 bends backward from the central point CP and is deformed.
To do. At this time, the bending portion 103 is provided at the tip portion.
Until the large loop portion 98 touches the partition wall 112.
And the large loop portion 98 is bent by contacting the partition wall 112.
The increase in deformation is limited. The large loop portion 98 abuts against the partition wall 112.
Thereafter, the shutter member 16 further moves to the open position side.
And the rigidity in the twist direction is low with respect to the small loop part 100
Since the large loop portion 98 is preferentially twisted and deformed, FIG.
As shown, the large loop section in the swing section 104
The straight portion between 98 and the small loop portion 100 is the large loop portion 9.
Swing counterclockwise about 8. Shutter member
When 16 moves slightly to the front with respect to the open position, FIG.
8, the small loop portion 100 is formed on the side wall 114.
The increase in torsional deformation of the large loop portion 98 is limited due to contact.
The After the small loop portion 100 contacts the side wall 114, the shaft
When the utter member 16 reaches the open position, the small loop portion 10
0 is in a slightly twisted state, and the small loop portion 100
The straight part on the tip side is slightly centered on the small loop part 100
Swings counterclockwise. As described above, the spring member 20 is
According to the movement of the member 16 from the closed position to the open position.
First, after bending and deforming the bending portion 103, the large loop portion
98 and the small loop part 100 are sequentially twisted and deformed,
Even when the spring housing 54 is narrow, the bar before and after the deformation or during the deformation
The joint member 20 must be securely housed in the spring housing 54.
In addition, from the closed position to the open position of the shutter member 16
It can be deformed following the movement. Against this
For example, the small loop portion 100 exists in the biasing arm 102.
If it does not exist, as shown by the two-dot chain line in FIG.
Since the straight portion on the tip side does not bend with respect to the loop portion 98,
A part of the front end side of the swing part 104 is from the shell member 14.
Will also protrude forward. One shutter member 16 is in the closed position.
When moving from the position to the open position, the spring member 20
One biasing arm that locks one shutter member 16
Only 102 is elastically deformed and connected to the other urging arm 102.
Therefore, elastic deformation does not occur. As a result, the other shutter
The turner member 16 is securely held in the closed position. In other words
In this way, the shutter member 16 in the closed position is engaged.
The other urging arm 102 stopped is connected to the cartridge case 3
Fixed to 0, and the boundary between the pair of biasing arms 102
The center point CP of the spring member 20 is one biasing arm
One of the energizing forces
Only the arm 102 is reliably deformed in the spring housing 54.
The elastic force to the closed position is applied to the shutter member 16
Make it. In the disk cartridge 12, the above-mentioned
Thus, the cartridge case 3 is opened by the opening / closing lever 128.
The shutter member 16 disposed on the lower surface side of the 0 is the open position
And the window portion 44 is opened. This
The eve device cartridges the spindle through the window 44.
Is inserted into the case 30 and connected to the center hub 46.
The recording disk 22 can be rotated.
From the recording / reproducing head through the window 44.
A recording surface on the lower surface side of the recording disk 22 with a light beam or the like
Information can be written to or recorded on this recording surface.
Can be read. The shutter opening / closing mechanism of the drive device is
When the disc cartridge 12 is ejected, the shutter member 1
Shut down the open / close lever 128 holding 6 in the open position.
Move from the open position to the standby position. This
The shutter member 16 is driven by the urging force of the spring member 20.
Follows the open / close lever 128 from the open position to the closed position
Moving. At this time, the spring member 20 is a shutter member.
Contrary to when 16 is opened, a small loop with twisting deformation
After the part 100 and the large loop part 98 are restored in sequence, the deflection changes
The bent portion 103 that had been shaped is restored and shown in FIG.
Return to the initial shape. The open / close lever 128 is a shutter.
When the member 16 moves to the closed position, the pressing piece 80 is almost simultaneously
Immediately after this, the pressed piece 96 of the lock member 18 is
Also leave. As a result, the lock protrusion of the lock member 18
The portion 92 is inserted into the lock recess 94 of the shutter member 16.
Thus, the shutter member 16 is locked in the closed position.
Also, the disc cartridge ejected from the drive device.
If the page 12 is inverted and inserted into the drive device, the recording data
Information can be recorded and reproduced on the recording surface opposite to the disk 22
become. The disk cassette according to this embodiment described above
According to the cartridge 12, in the cartridge case 30
To extend along the opening / closing direction of the shutter member 16
Provided on both sides from the center point CP along this opening and closing direction
A pair of urging arms 102 extending in each direction are opened and closed.
A spring member 20 that is elastically deformable along
The spring member 20 is paired by a pair of biasing arms 102.
When each of the shutter members 16 is urged to the closed position,
Any one of the shutter members 16 is opened from the closed position.
This one shutter part as you move to the release position side
How to open and close only one biasing arm 102 that holds the material 16
A single spring member by elastically deforming along the direction
20, the front side and the back side of the cartridge case 30
Each of the pair of shutter members 16 disposed on the side is closed
Since it can be biased to the position side, the pair of shutter members 16
When providing a pair of spring members individually corresponding to each
Compared to the above, if the spring member 20 itself can be enlarged,
And assembly of the spring member 20 into the cartridge case 30
Work becomes easy. Incidentally, the disk cartridge according to the present embodiment.
In the wedge 12, a laser beam or the like is used as the recording disk 22.
Information is recorded and reproduced on the recording surface by the light of
Other than this, the recording disk
Use magnetism to record and play back information
And those using both magnetism and light may be used. As described above, the disk according to the present invention.
According to the cartridge, it
A pair of shutter members corresponding to each has a simple structure.
The spring members can be biased toward the closed position.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing a configuration of a disc cartridge according to an embodiment of the present invention. FIG. 2 is an exploded perspective view showing a configuration of a disk cartridge in the embodiment of the present invention. FIG. 3 is an exploded perspective view showing an enlarged vicinity of a front end portion of a disk cartridge according to an embodiment of the present invention. FIG. 4 is a plan view showing the vicinity of the front end of the disk cartridge and the open / close lever according to the embodiment of the present invention, showing a state in which the open / close lever is in a standby position. FIG. 5 is a plan view showing the vicinity of the front end of the disk cartridge and the opening / closing lever according to the embodiment of the present invention, and shows a state where the lock member is rotated to the release position by the opening / closing lever. FIG. 6 is a plan view of the vicinity of the front end of the disk cartridge and the open / close lever according to the embodiment of the present invention, and shows a state immediately before the shutter member starts to move to the open position side by the open / close lever. FIG. 7 is a plan view of the vicinity of the front end of the disk cartridge and the open / close lever according to the embodiment of the present invention, and shows a state when the shutter member reaches an intermediate position between the closed position and the open position by the open / close lever. . FIG. 8 is a plan view of the vicinity of the front end of the disk cartridge and the opening / closing lever according to the embodiment of the present invention, showing a state where the shutter member has been moved to the open position by the opening / closing lever. FIG. 9 is a front view showing the configuration of the spring member according to the embodiment of the present invention, and shows a state before the spring member is stored in the cartridge case and a state where the spring member is stored in the cartridge case. Show. FIG. 10 is a perspective view illustrating a configuration of a shutter member in the disk cartridge according to the embodiment of the invention. [Description of Symbols] 12 Disc cartridge 14 Shell member 16 Shutter member 20 Spring member 22 Recording disc 30 Cartridge case 44 Window portion 66 Shutter body portion (shutter member) 68 Shutter guide portion (shutter member) 72 Guide piece (shutter member) 98 Large loop part (spring member) 100 Small loop part (spring member) 102 Biasing arm 103 Bending part (biasing arm) 104 Swing part (biasing arm) 106 Hook part (biasing arm) 108 Spring receiving part (shutter member) )

Claims (1)

What is claimed is: 1. A disk cartridge which stores a recording disk as an information recording medium in a cartridge case and is detachably mounted on a disk drive device, the recording disk having the same shape as each other. A pair of shell members which are superposed along the thickness direction of the cartridge case to form the cartridge case, windows formed on the pair of shell members so as to face a recording surface on one side of the recording disk, and the window A shutter member disposed on each of the pair of shell members so as to be movable between a closed position for closing the opening portion and an open position for opening the portion, and extends in the opening / closing direction of the shutter member in the cartridge case. A pair of urging arms that extend from the center to both sides along the opening and closing direction. A spring member that is elastically deformable along the opening and closing direction, and the spring member urges the pair of shutter members to the closed position by the pair of urging arms, and either one of them. A disk cartridge, wherein only one urging arm corresponding to the one shutter member is elastically deformed along the opening / closing direction as the shutter member moves from the closed position to the open position side.