TWI243361B - Disk cartridge - Google Patents

Abstract

A disk cartridge includes a case for accommodating a disk, a cover, installed at the case to be capable of being open and shut and having an open hole formed therein open to the outside, a shutter, installed under the disk in the case to be capable of moving, for opening/shutting an opening hole formed in the case; and a clamping member, installed at the cover to seal the open hole, for clamping the disk. Thus, since the clamping member blocks the hole of the cover connected to the outside, the possibility of intrusion of dust into the disk cartridge is reduced. Also, since there is no need to installed the clamping member at the disk drive, the disk drive can be made simplified and slim.

Description

1243361 V. Description of the invention (1) The technical field to which the invention belongs The present invention relates to a disc cartridge, and more particularly, to a disc cartridge used to protect the recording surface of a contained disc, that is, to protect data Record / copy media to prevent contamination such as dust or fingerprints. ^ A prior art In general, the disc accommodating s card is depleted feed disc recording / reproducing medium, and is arranged within the disk drive apparatus. Please refer to Figure 1, which is a perspective view of a conventional disc cartridge. 1〇〇 conventional disc cartridge comprising a housing (〇836) 101, the movable shutter (61 ^ 311,111 ') and an upper cover 110

(cover) 103. The casing 101 is used to receive the disc D. The movable shutter 110 is arranged in the housing 101, and can be rotated to selectively open or close an opening hole 102 located on the housing, so that the read / write head (not shown) of the disc drive device can Approach disc D. The upper cover 103 is fixed to the upper portion of the case 101. Reference numeral 103b refers to an opening located in the upper cover 103 (open hole) to clamp the disc D. substitutions, and The reference numeral 103a is an escape prevent ion lever, which is disposed on the upper cover 103 and is slidable to prevent the disc D from passing through the opening 103b. Therefore, when the disc D is placed, the detachment prevention lever 103a is pulled backward without hindering the disc D. After the disc D placed in the appropriate, prevent the rod from 1〇3 & pushed forward from the front end so that the rod 103a to prevent unraveling of the disc can be avoided through the opening i〇3b ρ disengaged.

Next, refer to FIG. 2 A second conventional disc cassette 2 a graph of the activity of the first state of the plan view of FIG shutter closed. When the disc cartridge 1 0 0 containing the disc D is inserted into the disc drive device, an opening lever 120 disposed on the disc drive device first pushes an opening piece (iii),

〇82lpi f.ptd Page 10 1243361 V. Description of the invention (2) The protrusion lllc of the movable shutter 110 is released from the groove grove of the housing 101. Next, as shown in Figure 2B, Figure 2B a conventional disc cartridge in FIG. 1 Activity plan view showing the shutter open. The opening lever 1 2 0 pushes away the blocking piece (i n t e r f e r e n c e p c e c e) 1 1 1 b to pivot the movable shutter 110 about the left and right pivot axes 110 a. This conventional technique of shutters 11 billion by the first event-based shutter portion (first shutter portion) lll portion and a second movable shutter (second shutter portion) 112 is composed, the first movable portion 111 and the shutter second movable shutter portion 112 disposed on the rotary shaft 11 rotating 〇a 'and by, the tooth engagement portion (engagement gear portion) 113 engaged with each other fields of activity shutter portion 111 is connected to the barrier sheet 11 when 1 b ^ and rotates in the clockwise direction, second movable shutter portion 112 rotates counterclockwise places' are activated γ activity in the first 11 and second movable shutter portion shutter portion 1112 < The holes 1 2 are opened by being separated from each other. Then, the rotating disk (not shown) and the clamper (not shown) of the disc driving device can clamp the disc D through the hole 102 and the opening 103b (shown in FIG. 1), respectively. Then the read / write head of the disc drive device (shown ^ ^ _) can be approached to the recording surface of disc D for data, recording, and / or restoration procedures. Although not shown in the drawing, a torsion spring (tor: = n spr i ng) elastically biases the first 111 in a counterclockwise direction in the drawing, that is, in the direction of closing the hole 102. This twist ^ ^ ^ is placed on the door of the first movable shutter portion η and the bottom surface of the housing 100m. When the force applied to the opening lever 120 is removed, the movable shutter is removed. To the original closed position. κη gateway However, in the above configuration, although the opening 103 through the dust

10821pif.ptd Page 11 Fifth, the invention is clear. Since the upper surface of the disc D facing the opening 10 3 b is not invaded by 10 3 b, S ”, so direct pollution by dust will not occur. But Cloth which records surface and accumulate on the active 11 billion shutter accumulated cover the activities' when the dust intake will at shutters Shu i square opening / closing operation during plate 1J 0S:. record topsheet t Moreover, If the likelihood is not necessarily attached by a movable shutter by false music \ D record high surface subjected to dust contamination. plate 110 '' ^ 11 billion each movable shutter system disposed in the housing 101, and in addition Singles '*' Shang square wide 1 1 η μ shutter 11 to the movable ○: ,, ____ ^ a wear plate and movable patrol you Lord [upsilon] Shang ▼ electrode 11 to the movable shutter 11 is opened or closed square line D placed on the sheet / η the contact surface of the disc can record square of d (i.e., the operation when attached 'record surface of the disc d such activities may be subject to a lower surface of the disc of FIG. ^ damage. shutters 11 square configuration at ^ Ji-described brake injury , when the movable shutter 1 Shu square in shape and is closed, on the two shutters ϋ easily deformed lower state being However, > The second movable shutter part ⑴ and ιΐ2 with the second and strong force are pivoted with this, that is, 丄 0a. When the user engages through one end and produces a stand: :: the other end of the plate 11 The plate is easy to press through the hole. It is easy to press. If the opening / closing is deformed, the result is that the opening / closing operation is smooth, and the operation is 112, which can prevent the soil from being lost. The resulting gap has a movable shutter with a force of // m ρ χ 0. Therefore, by preventing the movable shutter " ο "jm; and protecting the recording surface of the disc D, a disc of improved structure is provided. In order to solve the above-mentioned problems, an object of the present invention is to provide an inventive content.

When the stomach 1,243,361 10821pif.ptd 12 V. invention is described in (4) kinds of improved disc cartridge can prevent dust from entering into the housing, the shutters to open / close operation, the record surface of the disc can be protected , but also to prevent deformation of the shutters by external force in order to maintain more stable discs. To achieve the above object, the present invention provides a disc cartridge comprising a housing, a housing cover, a movable shutter, and a clamp member. The casing is used to accommodate the disc. The cover is arranged on the casing and can be opened and closed, and has an opening therein to open to the outside. A movable shutter disposed in the casing line and located below the disc and movable for opening / closing an aperture on the housing. And a clamp member is arranged on the shell cover to seal the opening for clamping the disc. To achieve the above object, the present invention provides a disc cartridge including a casing, a casing cover, a movable shutter, and a clamp member. The casing is used for accommodating a disc. The shell cover is arranged on the upper surface of the shell and can be opened and closed to seal the upper surface of the shell; the movable shutter is arranged in the shell and under the disc and can be moved to open / close the shell A hole in the body. The clamping member is arranged on the inner surface of the cover for clamping the disc. In order to make the above and other objects, features, and advantages of the present invention more comprehensible, a preferred embodiment is given below in conjunction with the accompanying drawings to describe in detail as follows: FIG. 3 and FIG. It is a diagram of a disassembled and assembled state of a disc cartridge according to a preferred embodiment of the present invention. Please refer to FIG. 3 and FIG. 4. The disc cartridge of the present invention includes a housing 201, a movable shutter 210, a housing cover 203, and

10821pif.ptd Page 13 1243361 V. Description of the invention (5) Clamping member 240. The casing 201 is used to receive a disc D. The movable shutter 2 1 0 is used to open / close a hole 202 disposed in the housing 20 i and below the disc. Housing cover 203 for covering the upper surface of the housing 201. The clamp member 240 disposed on the housing cover 203 to seal the opening of a 2 0 3 a ° in this embodiment, the clamp member 240 as in a conventional disc drive apparatus is the same as the clamp having a clamping sweet function, while having closely 2 0 3 a blocking of the opening function. That is, the structure of the present invention, a system has a clamp member having features arranged on the cover 2 billion 3, instead of the disc drive device, and simultaneously it has a function of sealing the opening 2 0 3 a. Hereinafter will clamp member 240 for a detailed explanation. Next, the movable shutter 2 10 is composed of first and second movable shutter portions 2 1 1 and 2 12, which are arranged in the housing 201 and can be pivoted symmetrically. Thus' when the first and second movable shutter portions 211 and 212 separated from each other in the direction of separation, 2 square hole 2 is opened (see FIG. 6). When the first and second movable shutter portions 2 1 1 and 2 1 2 pivot in opposite directions, that is, directions close to each other, the hole 2 0 2 will be closed (see FIG. 5). Reference numeral 2 1 3 refers to a joint portion for allowing the first and second movable shutter portions 2 1 1 and 212 to interact with each other. Thus when first movable shutter plate 211 pivot portion, the second movable shutter 212 to 213 will be pivoted in the opposite engagement plate portion by portion. A torsion spring 2 0 4 elastically biases the first and second movable shutter portions 2 1 1 and 2 1 2 in a direction of closing the hole 2 0 2. The torsion spring 204 is disposed between the bottom surface of the lower case 201 and each of the first and second movable shutter portions 2 1 1 and 2 1 2. Thus, when applied to the opening

l〇821pi f.ptd Page 14 1243361 V. Description of the invention (6) After the force of the lever 1 2 0 is removed, the movable shutter 2 1 0 returns to the original closed position.

The projections 230 and 220 respectively disposed on the first and second movable shutter portions 2 1 1 and 2 1 2 will contact the peripheral edge portion D3 of the disc D. That is, the disc D includes an inner clamp area d 1, a data area D 2 for recording data, and an edge part D 3 located outside the data area D 2. Since the edge portion D 3 supported by the protrusions 230 and 220 is one of the non-data areas, contact between the data area D 2 and the movable shutter 21 can be avoided. The protrusions 2 2 0 and 2 3 0 respectively have inclined surfaces 2 2 1 and 2 3 1 which are inclined toward the center of the disc D received. Therefore, as shown in FIG. 5, when the first and second movable shutter portions 2 1 1 and 2 1 2 are closed, the edge portion D3 of the disc D is supported by the upper ends of the protrusions 220 and 230. When the first and second movable shutter portions 2 1 1 and 2 1 2 are opened, as shown in FIG. 6, the disc D is lowered along the inclined surfaces 221 and 231. This decrease of disc D inner periphery of the clamp area D1 located in the support protrusions 205 of the housing 201. Thus, when / tongue movable shutter 210 closed, the disc D rises and the clamp member 240 tightly clamp its contact area D1, as shown in Figure 5. Further, the support members 207 and 211 disposed in line 212 below the surface of each of the first and second movable shutter portion, the other receiving surface that is the opposite surface of the disc d, so the support member 2 is inserted located 〇7 guide slits (guide slot) within the housing 206 and slidably 2 〇1. When the first and second movable panels 2 1 1 and 2 1 2 are pivoted, this guide slit 2 06 is formed along the track of the branch member 2 07. Therefore, during the opening and closing operations of the first and second movable shutters 2 1 1 and 2 12, the supporting member 2 07 slides along the guide slit 2 0 ^. End portion of the supporting member 207 is inserted into the guide slit 2〇6 2〇7a, thrush

10821pi f.ptd Page 15 1243361 V. Description of the invention (7) The contact portion 206a of the guide slit 206 is stuck, as shown in FIG. Thus, when an external force is applied to the movable direction of arrow F to the shutter 210, since the end portion 2 0 7 a slit 206 for guiding the contact portions A jammed 206, the housing 2 can be prevented 01 activities in the bending deformation of the inner shroud 210. In this case, although the end portion 207a may be configured to project outwardly of the housing 201, is connected to the guide slot 206 of the receiving portion 206 disposed in the housing B to 201 preferably, end portion 207a so It does not protrude above the outer surface of the housing 201, as shown in FIG. ! ► · Coupling protrusion 211a and coupling groove 212a are joined together, and are formed at the positions where the first movable shutter portion 2 1 1 and the second movable shutter portion 2 1 2 are tightly joined, respectively. , As shown in Figure 8. When the first movable shutter portion 211 and the second movable shutter portion 2 1 2 are in close contact with each other and the hole 2 02 is closed, the engaging protrusion 21a and the engaging groove 212a are tightly engaged with each other. the direction of the arrow F is applied to the movable shutter 210, the shutter than the first movable unit 211 and the second movable shutter unit 212 in the case of separation, shutters can reduce the possibility of deformation 210. Of course, the engaging protrusion 2 1 1 a may be formed on the second movable shutter unit 2 1 2, and the engaging groove 2 1 2 a may be formed on the first movable shutter unit 211. The clamping member 2 4 0 completely closes the opening 2 3 of the housing cover 2 0 3 a to prevent foreign substances such as dust from entering, and clamps the sweet disc D if necessary. 3 and 4 as shown in FIG, jaw member 240 includes a jaw holder (clamping holder) 241, vehicles (yoke) 242 and an upper cover (c〇ver) 243. The clamp bracket 2 4 1 is an edge portion supporting the opening 2 0 3 a. A yoke 242 arranged on the line clamp hole 241. The upper cover is used to completely cover the upper part of the clamp bracket 241

10821pif.ptd Page 161243361 V. invention is described in (8) port 2 0 3 a. Accordingly, since the opening 2 0 3a 24〇 the clamping member is fully sealed, dust can not pass through the opening 2 0 3 a intrusion. In order to exchange the disc D, shall open the housing cover 203 and the disc D with a new disc replacement, as shown in FIG. 4. When the disc D in the body 201 rises, the clamp holder 241 closely contacts a clamp area D 1 of the disc d, as shown in FIG. 11. Further, the disc d rise, ^ square section as shown in FIG. When the rotating disk within the disk drive apparatus T into and through the holes 202 to carry out a record / reproducing the program, thus accommodating the disk T on the rotary disc D increases. At this time, a magnetic attractive force is generated between the yoke 2 4 2 and the magnet T1. The magnet T1 is arranged on the rotating disk T, and this magnetic attractive force acts as the force of the clamp disc D. Reference numeral 211 indicated B shutter lock tab portion (locking piece) on a first event 211, the locking plate 211b has a locking hook (locking · ^ hook) 21 lc at its end a ^. When the hole 202 is closed, the lock pawl 21 lc with second movable shutter portion 212 of the locking projection (locking protrusion) on the lock groove 212b (locking groove) 212b 'resiliently engage. A state of the disc cartridge having the disc D to the movable shutter plate 210 and the cover 203 is closed, enters a disk drive apparatus, as shown in Figure 5. At this time, all the channels that dust can penetrate into the inside of the disc cartridge are blocked. When the disc cartridge enters the disc drive unit, as shown in Figure 6, the opening lever 1 2 0 arranged on the disc drive unit pushes the lock plate 2 1 1 b so that the lock hook 2 1 1 c moves from the lock groove. 2 1 2 b 'Release and push open the locking protrusion 2 1 2 b where the locking groove 212b' is formed. Therefore, the second movable shutter unit 212 is pivoted clockwise in the drawing, and then the first movable shutter unit 21 1 is rotated counterclockwise by being engaged with the joint portion 2 1 3. Thus between the first movable shutter

1,243,361 10821pif.ptd page 17 V. invention is described in (9) the plate portion 211 and second movable shutter portion between the holes 212,202 open. On how such, since only the first movable shutter unit 211 and a second movable shutter means projecting portion 212 of the plate 22 0,2 and 30 contacting the disc D, since the contact area at the edge of the disc D of the restriction section D 3, which is a non-data area. Therefore, when the movable shutter 2 10 is opened and closed, the data area D 2 of the recording surface on the disc D is hardly damaged. When the movable shutter 2 10 is opened, the disc D is directed downward along the inclined surfaces 221 and 231 of the protrusions 2 2 and 230, and is temporarily supported by the upper surface of the protrusion 205 and the inclined surfaces 221 and 231. as FIG. 6 and 9 shown in FIG. In this state, the disc drive rotating disc (not shown) of the disc drive device enters and clamps the disc D through the hole 2 0. The disc D is formed by the protrusion 2 0 5 and the inclined surface 2 2 1, 2 3 1 and are supported against the clamp member 2 4 0, as shown in FIG. 10. After that, the rotation of the disk and the operation related to the disc D data record / copy. Conversely, when the record / copy operation is completed, the disc is lowered and removed by rotating the clamping member in the clamping operation 240. The protrusions 205 and the inclined surfaces 221 and 2 3 1 support the non-data areas D 1 and D 3 of the disc, respectively. In this state, the card disc cartridge from the disc drive apparatus will be discharged, first movable shutter portion 211 and the second shutter portion movable live 212 to its original position to close the two holes 2 billion. This implementation embodiment 'of the peripheral edge portion of the disc D D 3 2 2 1, 2 3 1 rises along the inclination 220 and the surface 230 of the projecting portion' back to the case depicted in FIG. 5. Since the movable shutter 2 10 will not touch the data area D 2 of the disc ρ during the closing operation, the data area D 2 can be safely stored. Moreover, in this state, the disc D rises along the inclined surfaces 2 2 1 and 2 3 1 and pushes the clamp holder 241 of the edge portion of the support opening 2 03 a to closely contact the upper cover 243. That is, clip

10821pif.ptd page 18 Ϊ243361 '________ i' Description of the Invention (10) between the seal holder 241 is clamped at 243 and the upper cover disc D. Therefore, since the misaligned bracket 2 4 1 does not move, the collision of the clamp bracket 2 4 1 with other components in the disc cartridge, such as the case cover 203 and the upper cover 243, and the generated noise can be avoided.

In a state where the movable shutter 2 1 0 is closed, since the engaging protrusions 211 a and the engaging grooves 2 1 2 a of the first movable shutter portion 211 and the second movable shutter portion 212 are engaged with each other, and the supporting member 2 07 endpoint 2 0 7 a portion of the guide slot 206 of the contact portion 206 A jammed. Even when the movable shutter 210 is pressed into the housing 201 by the pressure through the holes, the movable shutter 210 is not advanced. Therefore, deformation due to external force applied to the movable shutter 2 10 can be prevented and the closed state of the hole 2 2 can be stably maintained. Next, FIG. 12 to FIG. 14 are a disc cartridge according to another preferred embodiment of the present invention. In this embodiment, the same reference numerals refer to the same components having the same functions. Disc cassette having a housing which has no such lines arranged in the housing cap, no internal surface 'of the cap 203' Since the dust cover 203 in the housing. The clamp is attached to the cover 2 0 3 ’and it contacts the ring structure

As shown in the drawing, the structure of an embodiment similar to the embodiment previously mentioned, a further embodiment of this embodiment. However, a hole in the cover 203 of the opening 203 and the inner clamp member 240, 2/3 'of the surface. That is, the opening that can pass through in this embodiment is not formed on the case cover 203, so the fully closed state on that side can be maintained. Since the housing opening 'the clamp member 240, the cover line disposed 〇3 2, the member 240' includes a yoke 242, the clamp holder 241 and the annular member affixed to the inner surface 244. Clamp holder member 241 when the edge portion 244 of the support by flutter.

1〇821pif.ptd Page 19 1243361 V. Description of the invention (11) When the disc cartridge with the above structure is loaded into the disc drive device and the data recording / copying process is performed, as shown in FIG. 13, the disc D is clamped between the plate 241 and the rotating disk T clamp holder. When the disc cartridge is ejected from the disc drive, as shown in Fig. 14, the clamp holder 2 41 is clamped between the disc and the inner surface of the case cover 203 '. Therefore, the disc cartridge of this embodiment can fundamentally prevent dust from penetrating through the cover 230 '. Other features include active shutter opening / closing of the previously mentioned description of the same embodiment. As described above, the disc cartridge of the present invention has the following effects: First, by the possibility of blocking the housing cover to the opening through the outside, dust intrusion can be prevented, so the record surface of the disc can be decreased contamination of . Second, because the clamping member is arranged based on the disc cartridge, the disc drive apparatus can be made simple and compact. Third, since the end portion of the support member is stuck at the contact portion of the guide slit, deformation due to external force applied to the movable shutter can be prevented and the closed state of the movable shutter can be stably maintained. Fourth, since the holes in the opening / closing operation when the activities within the housing shutter contact only the non-information area of the disc, the disc's data area can be safely stored. Fifth, since the cover line disposed on the housing, and can be opened and closed, so the disc can be easily replaced. Although the present invention has been disclosed as above with preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art will not depart from the present invention.

10821pif.ptd Page 20 1243361

10821pi f.ptd Page 21 1243361 Brief description of the drawings Figure 1 is a perspective view of a conventional disc cartridge; Figures 2A and 2B are the movable shutter opening / closing of the traditional disc cartridge of Figure 1 plan view of the state; the state graph of FIG. 3 in combination disc cassette of a preferred embodiment of the present invention is an exploded perspective view of the disc cassette according to the fourth graph of FIG. 3; FIG. 5 is a third graph activity disc cassette shutter closing a plan view of a third graph of FIG. 6 activity disc cassette shutter open state of the flat 7 along the graph of FIG. 5 A - cross sectional view of A 'line of 8 The figure is a sectional view of FIG. 5 along the line B-B '. The figure 9 is a sectional view of FIG. 5 along the line C-C'. The figure 10 is a view of the clamp discs in the disc cartridge of FIG. 3. State diagram; FIG. 11 is a state diagram of a clamp holder in a disc cartridge of FIG. 3, and FIG. 12 is an exploded perspective view of a disc cartridge according to another preferred embodiment of the present invention; disc cartridge 13 in the graph of FIG. 12 clamp the disc state of FIG.; FIG disk and the state of the second graph 14 in FIG. 12 of the cassette holder of the clamp of. Description of graphical symbols: 100, 200: Disc cartridge

10821pif.ptd Page 22 1243361 Brief description of the diagram 10 1 '101a 102, 1 03 > 1 03a 1 03b 1 1 0 > 110a 1 1 1 > 111a 111b 111c 1 1 2 > 113 120 204 205 206 2 0 6 a 2 0 6 b 2 0 7: 2 0 7a 211a 211c 20 1: housing: groove 2 0 2: holes 203, 203 ': housing cover: anti-detachment lever, 2 0 3 a: opening 2 1 0 : Movable shutter: Rotary shaft 2 1 1 · 1st movable shutter portion, 2 1 1 b: Locking piece: Blocking piece: Projection 2 1 2: The second movable shutter portion engages the toothed opening torsion spring protrusion • the contact portion of the guide slot: receiving end portions of the support member engages the locking hook projections

10821pi f.ptd Page 23 1243361 Simple illustration

2 12 a: engagement groove 2 1 2 b: latching protrusion 2 1 2 b ': lock groove 2 13 • joints 220, 230: protrusions 22 1, 2 3 1: inclined surface 240, 2 4 0 ′: clip jaw member 241: clamp bracket 242 •• vehicle 243: cover 244: annular member D: disc D1: clamp area D2: information area D3: an edge portion T: rotary disk T1: first magnet 24 10821pif.ptd

Claims (1)

this? Month I said— * 1 I includes · Amendment 12433361 _ Case No. 92102504 6. Scope of patent application 1 · A disc cartridge and a case for accommodating a disc; and a shell cover is arranged in the disc case. the housing and can open and close an opening to the outside through the opening; a movable shutter disposed in the housing and positioned below the disc and the movable for opening / closing an aperture on the housing; and a clamp member, the housing cover system configured to seal the opening 'to clamp the disc, wherein the shutter is one having a predetermined inclination angle and having a projection surface projecting portions to support the disc of A non-data area on the periphery so that when the movable shutter is opened, the disc rises along the inclined surface to closely contact the cover. 2. The disk cartridge according to the application of paragraph 1 patentable scope, wherein the clamp surface member comprising: a clamp bracket for contacting and supporting a portion of the edge of the opening of the cover; a magnetic object, configuration in the jaw holder, for applying a magnetic attraction to the rotating disk a 'system within the turntable _ disk drive means for receiving the disc; and A cover for clip from the holder seal the opening above the sweet. 3. The “slit” described in item 1 of the scope of patent application is formed along the movement / weight /, and arranged in the housing, and is located on one of the movable shutters, and the movement of the board is performed. The seam can be slid, so that one of the supporting members is inserted into the guide-contact portion and stuck. And the point is the guide slit 4 ¥ Yuanyueyue Amendment 1243361 _ Case No. 92102,504 6. Scope of patent application 4. The disc cartridge as described in item 1 of the patent application scope, wherein the movable shutter includes a first movable shutter portion and a The second movable shutter portion opens or closes the hole by being approached or separated from each other, and a joint groove is disposed in one of the first movable shutter portion and the second movable shutter portion, and a joint protrusion The object is arranged at the other of the first movable shutter portion and the second movable shutter portion, and is joined to the joint groove, so that when the joint protrusion is joined with the joint groove, the joint protrusion It is inserted into the joint groove. 5. The disk cartridge according to the patent scope of item 1, wherein a protrusion for supporting the non-information area of the inner circumference of the disc, the disc will be disposed along the inclination of the housing surface fall. 6. —disc cartridge, comprising: a casing for accommodating a disc; a casing cover arranged on an upper surface of the casing and capable of being opened and closed to seal the casing. A surface; a movable shield disposed in the casing and below the disc and movable, for opening / closing a hole in the casing; and a sweet-sweep member disposed on the casing cover an upper inner surface, to clamp the disc. 7. The disk cartridge according to the application of paragraph 6 patentable scope, wherein the clamp member comprises: an annular member disposed on the inner surface of the cover of the housing; a clincher holder, for supporting the ring an edge portion of a shaped member; and a magnetic body, disposed on the jaw holder, for applying a magnetic attraction onto a rotating disk, the rotating disk in a disk drive system inside the apparatus, 10821pi f1.ptc page 26 amendment No. 1,245,361 92,102,504 six, for receiving the patent scope of application, such as 8.3 has a movable shutter opening and to support the disc, when the disc, the inner surface of the disc. 9 · If the guide slit is formed along the slit, and the disc can be slid. Please patentable scope of item 7 of the disc cartridge, wherein the inclined surface of one of said predetermined angle and a live non-data area having a peripheral projection of the pieces of a projection, such that when the shutter is along the tabletting the inclined surface lowered, and when the shutter is closed rises along the inclined surface to closely contact the housing cover of the disk cartridge according to the requested item 6 patentable scope, wherein a lead disposed in the inner housing with the movement of the movable shutter plate trace execution of the activity is located in one of the shutter plate supporting member is inserted into the guide slot, so that the supporting member for the one end portion in contact with one of the guide slit portion stuck. 10. The disc cartridge according to the item 6 patents range, wherein the movable shutter includes a first movable shutter portion and a second movable shutter portion, close to each other or separated by opening / closing the hole, and an engaging groove disposed on the shutter portion of one of the first events and the second movable shutter portion therebetween, and a projection system arranged to engage the first movable shutter portion and said second movable shutter another portion of both the plate and bonded to the engaging grooves, such that when the projection engages with the engaging groove are joined together, the engaging projection is inserted into the engaging groove system. 11. The disc cartridge according to the item 6 patents range, wherein a protrusion for supporting the inner circumference of the disc of the non-information area, the disc will be disposed along the housing to the the inclined surface lowered. 10821pifl.ptc Page 27