JP2005267770A - Disk cartridge - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obtain a disk cartridge in which dust attached to a recording plane of a disk medium can be removed. <P>SOLUTION: In the disk cartridge 10, a case 14 in which a disk medium 12 is housed rotatably is provided with a head opening part 16 for accessing a recording plane of the disk medium 12, and one part of the head opening part 16 is opened and closed by allowing a second shutter 74 to rotate around a supporting axis 52 deviated from an axis center of the disk medium 12. A second convex part 80 positioned at a diameter direction inner side more than the recording plane of the disk medium 12 in a blockade state of the head opening part 16 in the shutter 74 is provided with a cleaning member 92 wiping out the recording plane of the disk medium 12 as opening and closing operation of the head opening part 16 by the shutter 74. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a disk cartridge in which a disk-shaped disk medium used as an information or video recording / reproducing medium is rotatably accommodated in a case.

  For example, disk-shaped disk media such as optical disks and magneto-optical disks are used as computer recording / reproducing media and video recording / reproducing media. When such a disk medium is recorded or reproduced, the recording layer of the disk medium is accessed by a recording head that accesses the recording surface side of the disk medium while being rotated by the spindle shaft while being loaded in the disk drive device. The laser beam or both the laser beam and the magnetic field are irradiated. As a result, in the disk media, information is recorded by pit formation, phase change, magnetization reversal, etc. due to decomposition and / or temperature rise of the recording layer, or recording by reading the reflectance and polarization angle of the laser beam with a reproducing head. The reproduced information is reproduced.

  In order to prevent dust and the like from adhering to the surface (the cover layer that covers the recording layer) of the recording surface of the disk media as the recording capacity of the disk media increases, the disk medium is placed in the housing portion of the case. An accommodated disk cartridge is known (see, for example, Patent Document 1). In such a disk cartridge, a center hole of the disk medium and a chucking opening and a head opening for accessing the recording surface are provided on the recording surface side of the disk medium in the case. These openings are opened and closed by a pair of shutters driven by an inner rotor.

  In addition, there is known a disk cartridge provided with an opening that allows the disk medium to be taken in and out on the opposite side of the disk medium in the case from the chucking opening and the head opening (see, for example, Patent Document 2). . In this disk cartridge, the opening is provided, and a pair of shutters including the inner rotor are operated on the same plane, thereby reducing the thickness. This disk cartridge will be described with reference to FIG.

  10 includes a chucking opening 104 for accessing a center hole of a disk medium (not shown) in a bottom plate 102A of a case 102, and a head opening for a head of a drive device to access a recording surface. 106 are provided. Between the disk medium in the case 102 and the bottom plate 102A, there is a first shutter 108 supported so as to be rotatable coaxially with the disk medium, and a rotating shaft 112 on the radially outer side of the disk medium in the case 102. A second shutter 110 is provided.

  As shown in FIG. 10A, the first shutter 108 and the second shutter 110 abut against the abutting end faces 108A and 110A to close the head opening 106, and the chucking opening 104. Is always open. Then, the first shutter 108 is rotated in the direction of the arrow G, and the second shutter 110 is rotated in the direction of the arrow H substantially opposite to the arrow G with respect to the head opening 106, as shown in FIG. As shown, the head opening 106 is opened.

Further, convex portions 114 and 116 formed in an arc shape in a plan view project from the upper surface of the first shutter 108 and the upper surface of the second shutter 110, respectively. The pair of convex portions 114 and 116 form an annular shape that surrounds the chucking opening 104 in plan view as a whole, with the end portions in the circumferential direction abutting each other when the head opening 106 is closed. A surface around the center hole provided in the axial center portion of the disk medium 12 is brought into contact with the upper end surfaces of the annular convex portions 114 and 116. This prevents dust from entering the recording surface side of the disk medium via the chucking opening 104.
JP 2003-115184 A JP 2003-242740 A

  By the way, in the disk cartridge that opens and closes the head opening by the shutter, the head opening is closed by the shutter when not in use such as during storage or transportation, and dust can be prevented from entering the recording surface side of the disk media. It is impossible to prevent dust (such as dust) that has entered the case 102 with the head opening opened in the drive device from adhering to the recording surface of the disk medium during subsequent storage. In addition, since dusts are lightly attached to the recording surface, they are often removed by centrifugal force when the disk medium is rotated or by a surface air flow accompanying the rotation of the disk medium, but cannot be completely removed. In particular, on the inner peripheral side of a disk medium having a weak centrifugal force or surface airflow, dusts are difficult to remove as the disk medium rotates.

  However, in each of the above disk cartridges, no consideration has been given to measures against dust that has entered the case adhering to the recording surface of the disk medium.

  An object of the present invention is to obtain a disc cartridge capable of removing dust adhering to the recording surface of a disc medium in consideration of the above facts.

  In order to achieve the above object, a disk cartridge according to the first aspect of the present invention comprises a case that rotatably accommodates a disk-shaped disk medium and has a head opening for accessing the recording surface of the disk medium. A shutter that is disposed on the recording surface side of the disk medium in the case and that opens and closes at least a part of the head opening by rotating around an axis that is eccentric from the axis of the disk medium; Provided in a portion located radially inward of the recording surface of the disk medium when the head opening is closed, and the shutter wipes the recording surface of the disk medium in accordance with the operation of opening and closing the head opening. And a cleaning member.

  2. The disk cartridge according to claim 1, wherein the head opening for accessing the recording surface of the disk medium accommodated in the case is a shutter disposed between the recording surface of the disk medium and the head opening forming portion in the case. Is opened and closed by rotating around an eccentric axis with respect to the axis of the disc media. When the head opening is opened, the disk medium is rotated by the drive device, and information is recorded or reproduced by the head of the drive device accessed from the head opening. That is, the case accommodates the disk medium so as to be relatively rotatable so that the disk medium can be rotated by a drive device.

  Here, the cleaning member provided in a portion located radially inward of the recording surface of the disk medium in the closed state of the head opening in the shutter performs the opening / closing operation of the head opening, that is, the rotation about the axis. In order to wipe at least a part of the recording surface on the inner circumferential side, even if dust is attached to the recording surface of the disk media, the dust is removed from the recording surface or the adhesion force to the recording surface Becomes weaker and easier to remove. For this reason, the dust adhering to the recording surface of the disk media is recorded by the centrifugal force and the surface airflow even in the inner peripheral side of the recording surface where the centrifugal force and the surface airflow due to the rotation of the disk media are weak. Effectively removed from.

  Thus, in the disk cartridge according to the first aspect, dust attached to the recording surface of the disk medium can be removed.

  In order to achieve the above object, a disk cartridge according to a second aspect of the present invention rotatably accommodates a disk-shaped disk medium having a center hole in an axial center, and a head of a drive device records the disk medium. A case provided with a head opening for accessing the surface, and provided on the recording surface side of the disk medium in the case, and is rotated coaxially with the axis of the disk medium and the head opening A first shutter that opens and closes a part of the recording medium, and a recording medium side of the disk medium that is provided in the case and rotates about an axis different from that of the first shutter, and a part of the remaining part of the head opening. A second shutter that opens and closes, an arc-shaped first convex portion provided on the first shutter, and an arc-shaped second convex portion provided on the second shutter, and the head A disc inner periphery receiving portion that is formed in an annular shape by abutting the circumferential end portions of the first convex portion and the second convex portion in a closed state of the mouth portion and abuts against a surface around the center hole of the disc medium; A cleaning member that is provided on the second convex portion and that wipes the recording surface of the disk medium in accordance with an operation in which the second shutter opens and closes the head opening.

  3. The disk cartridge according to claim 2, wherein the head opening for the head of the drive device to access the recording surface of the disk medium housed in the housing of the case is closed by the first shutter and the second shutter when not in use. In use, the first shutter and the second shutter are pivoted about their pivot axes and opened. In a state where the first shutter and the second shutter close the head opening, the first convex portion and the second convex portion are formed in an annular shape by abutting (contacting or making close proximity) the end portions in the circumferential direction. The surface around the center hole of the disc medium is in contact with the inner periphery receiving portion of the disc. Thus, in a configuration in which the chucking opening is not blocked, the disc inner periphery receiving portion prevents dust and the like from entering the recording surface side of the disc medium. On the other hand, in a state where the head opening is opened, the disk medium is rotated by the drive device, and information is recorded or recorded information is reproduced. That is, the case accommodates the disk medium so as to be relatively rotatable so that the disk medium can be rotated by a drive device.

  Here, when the head opening is closed, the cleaning member provided on the second convex portion that comes into contact with the surface around the center hole of the disk medium (the inner side in the radial direction of the recording surface) is moved by the opening / closing operation of the head opening. In order to wipe at least a part of the recording surface of the disk medium while rotating about an axis different from the first shutter (axis of the disk medium) together with the shutter, dusts are temporarily formed on the recording surface of the disk medium. Even if it adheres, the dusts are removed from the recording surface, or the adhesion force to the recording surface is weakened and is easily removed. For this reason, the dust adhering to the recording surface of the disk media is recorded by the centrifugal force and the surface airflow even in the inner peripheral side of the recording surface where the centrifugal force and the surface airflow due to the rotation of the disk media are weak. Effectively removed from.

  Thus, in the disc cartridge according to claim 2, dust adhering to the recording surface of the disc medium can be removed.

  According to a third aspect of the present invention, there is provided a disc cartridge according to the first or second aspect, wherein the cleaning member is made of a nonwoven fabric.

  4. The disc cartridge according to claim 3, wherein the cleaning member is made of a non-woven fabric. Therefore, even if the recording surface is wiped off without being strongly pressed against the recording surface of the disk media, Can be easily removed.

  According to a fourth aspect of the present invention, there is provided the disk cartridge according to any one of the first to third aspects, wherein the cleaning member is configured to record the recording medium when the disk medium is rotated by a drive device. It is characterized by being separated from the surface.

  In the disk cartridge according to the fourth aspect, when the disk medium moves along the axial direction to a position where the disk medium is rotationally driven by the drive device, the cleaning member is separated from the recording surface of the disk medium. For this reason, it is possible to prevent the cleaning member located at a predetermined position during use of the disk medium from continuing to contact only a specific range in the radial direction on the recording surface.

  As described above, the disk cartridge according to the present invention has an excellent effect that dust attached to the recording surface of the disk medium can be removed.

  A disc cartridge 10 according to an embodiment of the present invention will be described with reference to FIGS. An arrow A appropriately shown in each drawing indicates the loading direction of the disk cartridge 10 into the drive device, and for convenience, the side indicated by the arrow A that is the loading direction into the drive device will be described as the front side. The direction indicated by arrow B is the upper side, and the direction indicated by arrow C is the right side.

  FIG. 1 shows an external appearance of the disk cartridge 10 in a perspective view, and FIG. 2 shows the disk cartridge 10 in an exploded perspective view. As shown in these drawings, the disk cartridge 10 includes a case 14 that rotatably accommodates a disk medium 12 as a disk-shaped information recording / reproducing medium, and a recording / reproducing head that opens at the lower surface of the case 14. A shutter mechanism 18 for opening and closing the head opening 16 for accessing the recording surface of the disk medium 12 and a disk from the disk opening 20 that opens above the case 14 and allows the disk medium 12 to be inserted into and removed from the case 14. A disk holding mechanism 22 for preventing the media 12 from falling off is configured as a main component. In FIG. 1, the disk medium 12 is not shown.

  First, a schematic overall configuration of the disk cartridge 10 will be described, and then a cleaning member which is a main part of the present invention will be described.

[Overall configuration of disk cartridge]
(Disk media configuration)
The disk medium 12 accommodated in the disk cartridge 10 is formed in a disk shape as described above. A center hole 12A that is chucked (engaged and held) by the rotating spindle shaft of the disk drive device is provided in the axial center portion of the disk medium 12. Further, as shown in FIG. 5, the recording surface (recording area) formed by covering and protecting the recording layer with the cover layer is a portion of the lower surface of the disk medium 12 except for a predetermined range around the outer periphery and around the center hole 12A. 12B. A region between the hole edge of the center hole 12 </ b> A and the inner edge of the recording surface 12 </ b> B on the lower surface of the disk medium 12 is a chucking area 12 </ b> C for the rotating spindle shaft of the drive device to hold the disk medium 12. In the present embodiment, the diameter (outer diameter) of the disk medium 12 is approximately 120 mm.

(Case structure)
The case 14 is formed in a substantially rectangular flat container shape in plan view by joining the upper shell 24 and the lower shell 26. Specifically, the case 14 has a front edge portion formed in a substantially symmetrical circular arc shape in a plan view and a rear end formed in a linear shape along the left-right direction. It is designed to prevent loading.

  The upper shell 24 includes a top plate 28 having a shape corresponding to the shape of the case 14 in plan view, and an outer peripheral wall 30 erected downward substantially along the outer edge of the top plate 28. The top plate 28 is provided with a substantially circular disk opening 20 in plan view, and the inner diameter of the disk opening 20 is larger than the outer diameter of the disk medium 12. Thereby, the disk medium 12 can be inserted into and removed from the case 14 through the disk opening 20. The upper shell 24 includes an annular inner peripheral wall 32 erected downward along the edge of the disk opening 20.

  Further, notches 34 for attaching a disk pressing member 84 to be described later are provided at two locations on the rear end side of the top plate 28 and on the radially outer side of the inner peripheral wall 32. Further, on the right side of the cutout 34 on the right side of the top plate 28, a lock operation window 36 that is long in the left-right direction for operating a lock member 88 described later is provided. On the other hand, a notch portion 30A having a U-shaped edge portion that is elongated in the front-rear direction and opens downward is formed in the front-rear direction central portion of the portion constituting the right side wall of the case 14 in the outer peripheral wall 30. ing. The cutout portion 30A and the cutout portion 40A of the outer peripheral wall 40 described later of the lower shell 26 constitute a substantially rectangular shutter operation window 46 at the center in the front-rear direction of the right side wall of the case 14.

  The lower shell 26 includes a bottom plate 38 having a shape substantially corresponding to the top plate 28 and an outer peripheral wall 40 having a shape substantially corresponding to the outer peripheral wall 30. The bottom plate 38 is provided with a substantially circular chucking opening 42 corresponding to the center hole 12 </ b> A of the disk medium 12 and the head opening 16. In the following description, the chucking opening 42 and the head opening 16 may be collectively referred to as an access opening 44. The head opening 16 is formed in a substantially rectangular shape that is long in the radial direction of the chucking opening 42, and is continuous with the front side of the chucking opening 42. Therefore, the notch edge of the bottom plate 38 formed by the access opening 44 is formed in a substantially U shape that opens forward. Further, the head opening 16 is formed by cutting out the front central portion of the outer peripheral wall 40 in the left-right direction over the entire height.

  The outer peripheral wall 40 is configured such that the upper end (open end) of the outer peripheral wall 40 abuts the lower end (open end) of the outer peripheral wall 30 of the upper shell 24 to form the peripheral wall of the case 14. At a position corresponding to the cutout portion 30A of the upper shell 24 on the outer peripheral wall 40, a cutout portion 40A having a U-shaped edge portion that is elongated in the front-rear direction and opens upward is formed. In a state in which the outer peripheral wall 30 and the outer peripheral wall 40 are in contact with each other, the notch 30A and the notch 40A form a shutter operation window 46 (see FIG. 1) on the right side surface of the case 14. ing. The shutter operation window 46 is for exposing an operation projection 66 of an inner rotor 60 described later.

  Further, the lower shell 26 includes an inner wall 48 erected partially from the bottom plate 38 along a circumference coaxial with the chucking opening 42. The inner wall 48 has an inner diameter of an imaginary circle connecting the inner surfaces thereof larger than an outer diameter of the inner peripheral wall 32 of the upper shell 24, and the inner wall 48 is interposed between the inner peripheral wall 32 and the upper shell 24 and the lower shell 26. A gap is formed. In this gap, an annular wall 62 (described later) of the inner rotor 60 is inserted. The bottom plate 38, the inner wall 48, and the inner peripheral wall 32 of the upper shell 24 form a disk housing portion 50 (see FIG. 1) as a housing portion for housing the disk media 12 in the case 14. As described above, the disk storage unit 50 can be loaded and unloaded with the disk medium 12 through the disk opening 20.

  Further, a support shaft 52 projects from the vicinity of the left rear corner of the bottom plate 38. The shaft center of the support shaft 52 is located outside the circumference along the outer surface of the inner wall 48, that is, outside the disk housing portion 50. In the present embodiment, the support shaft 52 is formed in a cylindrical shape whose inside is a reference hole 52 </ b> A that opens to the outer surface of the bottom plate 38. From the vicinity of the right rear corner of the bottom plate 38, there is provided a protrusion 53 provided with a reference hole 53A that is paired with the reference hole 52A and is elongated in the left-right direction. Further, a pair of left and right bearings 54 project from the radially outer side of the inner wall 48 at the rear portion of the bottom plate 38 and are used for supporting the shaft of the disk pressing member 84.

  Furthermore, a pair of guide pins 58 are projected in the vicinity of the left front corner of the bottom plate 38. The pair of guide pins 58 are disposed on a virtual circumference coaxial with the inner wall 48 and larger in diameter than the inner wall 48, and are used for guiding a disk receiving member 82 described later.

  The lower shell 26 described above is joined to the upper shell 24 by screws to form the case 14 with the upper end surface of the outer peripheral wall 40 abutted against the lower end surface of the outer peripheral wall 30. It should be noted that the upper shell 24 and the lower shell 26 may be joined by, for example, ultrasonic welding, adhesion, or the like, instead of screwing.

(Configuration of shutter mechanism)
The shutter mechanism 18 is provided in the case 14. Specifically, the shutter mechanism 18 includes an inner rotor 60 disposed in the case 14. The inner rotor 60 includes an annular wall 62 formed in a short cylindrical shape. As described above, the annular wall portion 62 is slidably inserted into the gap between the inner peripheral wall 32 of the upper shell 24 and the inner wall 48 of the lower shell 26. As a result, the inner rotor 60 can be rotated coaxially with the disc accommodating portion 50 (the disc medium 12 accommodated in the case 14) with respect to the case 14.

  A flat plate-like first shutter 64 is integrally provided inside the lower end of the annular wall portion 62. The first shutter 64 is a disk having the same diameter and the same diameter as the annular wall 62, a notch 65 </ b> A having substantially the same shape as the access opening 44, and an inner peripheral disk receiving portion (arc rib) 80 of the second shutter 74 described later. The shape is provided with a notch 65B corresponding to the relative movement locus. Further, the annular wall portion 62 is formed with a substantially U-shaped notch portion 62A that is continuous with the radially outer end of the notch portion 65A and whose edge shape opens downward. The cut-out portion 62A coincides with the cut-out portion of the outer peripheral wall 40 of the lower shell 26, so that the recording / reproducing head can be accessed from the front of the disk cartridge 10.

  The first shutter 64 is slidably mounted on the bottom plate 38 (disk accommodating portion 50) of the lower shell 26, and the outer peripheral side and inner peripheral side of the head opening 16 as the inner rotor 60 rotates. A closed position (see FIG. 6) for closing a part of the head opening 16 and an open position (see FIG. 9) for retreating from the head opening 16 can be taken. In other words, the first shutter 64 positioned at the open position is positioned so that the cutout portion 65 </ b> A substantially coincides with the access opening 44.

  An operation projection 66 that is exposed to the outside from the shutter operation window 46 of the case 14 protrudes from the outer peripheral surface of the annular wall portion 62. The operation protrusion 66 is disposed at the front end of the shutter operation window 46 when the first shutter 64 is in the closed position, and is positioned at the rear end of the shutter operation window 46 when the first shutter 64 is in the open position. Has been.

  Further, from the upper surface of the first shutter 64, a first convex portion 68 formed in an arc shape is erected along an edge portion corresponding to the chucking opening portion 42 in the notch portion 65A. The first convex portion 68 and the second convex portion 80 described later form an annular disc inner periphery receiving portion 90, and the upper end surface of the disc inner periphery receiving portion 90 is the lower surface of the chucking area 12C of the disc medium 12. It comes to contact with. Accordingly, the first shutter 64 is disposed between the bottom plate 38 and the disk medium 12 so as to open and close a part of the head opening 16.

  On the other hand, from the vicinity of the outer periphery on the upper surface of the first shutter 64, the outer periphery receiving convex portion 70 is erected so as to straddle the inner surface of the annular wall portion 62. The outer periphery receiving convex portion 70 has substantially the same height as the first convex portion 68, and a region on the lower surface of the disk medium 12 on the outer side in the radial direction from the recording surface 12 </ b> B contacts. Accordingly, the first shutter 64 is configured to support the disc medium 12 from below at the first convex portion 68 and the outer periphery receiving convex portion 70 when the first shutter 64 is located at the closed position.

  Further, a cam protrusion 72 is provided so as to protrude from the vicinity of the outer periphery of the lower surface of the first shutter 64. The cam protrusion 72 is disposed on the radially outer side of the notch 65B, and always enters a cam groove 78 (described later) of the second shutter 74.

  Further, the shutter mechanism 18 includes a second shutter as a shutter that closes a remaining part (a part on the inner peripheral side) of the head opening 16 when the first shutter 64 is located at the closing position. . The second shutter 74 is formed in a flat plate shape and slides on the bottom plate 38. For this reason, the portion of the first shutter 64 that interferes with the moving region of the second shutter 74, specifically, the radially outer portion of the notch 65B is thinner than the other portions. That is, the second shutter 74 is thinner than the portion of the first shutter 64 that closes the head opening 16.

  The second shutter 74 is formed in a long plate shape, and includes a boss portion 76 that is pivotally supported by the support shaft 52 of the lower shell 26 at one end portion in the longitudinal direction. As a result, the second shutter 74 rotates around the support shaft 52 to close a part on the inner peripheral side of the head opening 16 (see FIG. 6) and to retreat from the head opening 16. The position (see FIG. 9) can be taken. As shown in FIGS. 1 and 6, when the first shutter 64 and the second shutter 74 are in the closed position, the head opening 16 is completely brought into contact with the contact end surfaces 64A and 74A. It is the structure which obstruct | occludes.

  The contact end surface 74 </ b> A is formed in an arc shape around the axis of the support shaft 52. On the other hand, the contact end surface 64A is formed in an arc shape that contacts the contact end surface 74A with almost no gap in a state where both the first shutter 64 and the second shutter 74 are in the closed position. As a result, the second shutter 74 can be rotated about the support shaft 52 regardless of the rotation position of the first shutter 64, and interferes with the first shutter 64 as the head opening 16 is opened and closed. This is surely prevented and works smoothly.

  Then, the first shutter 64 moves from the closed position to the open position side by rotating in the direction of arrow D shown in FIG. 6 around the axis of the inner rotor 60, and the second shutter 74 moves the head around the support shaft 52. It is configured to move from the closed position to the open position side by rotating in the direction of arrow E which is substantially opposite to the arrow D with respect to the opening 16. Further, the first shutter 64 and the second shutter 74 are interlocked with each other. Specifically, the second shutter 74 is provided with a cam groove 78 substantially along the longitudinal direction, and the cam protrusion 72 of the first shutter 64 enters the cam groove 78.

  Thus, when the operation protrusion 66 of the inner rotor 60 moves rearward and the first shutter 64 rotates in the arrow D direction with the head opening 16 closed, the cam protrusion 72 rotates (revolves) in the arrow D direction. When the groove wall of the cam groove 78 is pressed, the second shutter 74 is rotated in the direction of arrow E. The cam protrusion 72 is positioned in the vicinity of the end of the cam groove 78 on the side of the support shaft 52 when the head opening 16 is closed, and the inner rotor 60 rotates in the direction of arrow D as shown in FIGS. Accordingly, the relative movement is performed so as to be separated from the support shaft 52.

  In the present embodiment, as shown in FIG. 8, the second shutter 74 reaches the open position before the first shutter 64, and then the second shutter 74 rotates in the direction of arrow E. In order to ensure rotation of the first shutter in the direction of arrow D while preventing the cam shaft 78, the end of the cam groove 78 opposite to the support shaft 52 side is cam protrusion when the second shutter 74 is located at the open position. It is formed in an arc shape that coincides with the movement locus of 72. Accordingly, the first shutter 64 moves from the rotational position shown in FIG. 8 to the open position shown in FIG. 9 without interfering with the second shutter 74. Further, in the shutter mechanism 18, the inner rotor 60 is rotated in the direction opposite to the arrow D from the opened state of the head opening 16, thereby closing the head opening 16 shown in FIG. 6 through the state shown in FIGS. 8 and 7. It is the structure which returns to a state.

  Further, as shown in FIGS. 1 and 2, a second convex portion 80 formed in an arc shape protrudes from the upper surface of the second shutter 74. The second convex portion 80 is configured such that, in a state where the head opening portion 16 is closed, the circumferential end portion of the second convex portion 80 abuts the corresponding circumferential end portion of the first convex portion 68 to thereby form the annular disc inner peripheral receiving portion 90. It comes to form. The outer side (radially inner side) of the second convex portion 80 in the second shutter 74 is a notch 74B (see FIG. 2). Therefore, the chucking opening 42 is configured to be completely opened while both the first shutter 64 and the second shutter 74 are located at the closed position. In other words, the chucking opening 42 is configured to be always opened by the notches 65A and 74B and communicate with the disk opening 20.

  As shown in FIG. 3, one end portion 80 </ b> A on the abutting end surface 74 </ b> A side of the second convex portion 80 has a tapered shape. In the present embodiment, the one end portion 80A is a curved surface that faces upward, the distal end side in the circumferential direction, and the radially inner side. One end portion 68A of the first convex portion 68 that is abutted against one end portion 80A of the second convex portion 80 has a tapered shape corresponding to the one end portion 80A. Thus, in the closed state of the head opening portion 16, the first convex portion 68 and the second convex portion 80 have a configuration in which a gap is not easily generated in the disc inner periphery receiving portion 90 formed in an annular shape by abutting the circumferential end portions. Has been.

  The disc inner periphery receiving portion 90 formed in an annular shape with the first convex portion 68 and the second convex portion 80 in a state where the head opening portion 16 is closed has an upper end surface thereof as a chucking area 12C on the lower surface of the disc medium 12. It is the structure made to contact | abut from the downward direction (it supports from the lower side). For this reason, it is configured such that dust does not enter the lower surface of the disk medium 12, that is, the recording surface 12B side, through the chucking opening 42 that is always open. A cleaning member 92, which will be described later, is provided on the upper surface of the second convex portion 80, and the cleaning member 92 and the first convex portion 68 directly come into contact with the chucking area 12C of the disc medium 12. Yes.

  Further, the shutter mechanism 18 includes a disk receiving member 82. The disk receiving member 82 has a periphery of the outer periphery receiving projection 70 cut out at the radially outer end of the notch 65A of the first shutter 64 in a state where the first shutter 64 and the second shutter 74 close the head opening 16. A disk outer periphery receiving portion 82A is provided between the direction end portions. That is, the disk outer periphery receiving portion 82A forms an annular shape with the outer periphery receiving convex portion 70 of the first shutter 64 located at the closed position, and in this state, the upper surface is substantially flush with the upper surface of the outer periphery receiving convex portion 70, The configuration is such that the remaining portion of the outer portion in the radial direction of the lower surface of the disk medium 12 is in contact with the lower surface (supported from below). As a result, dust (such as dust) does not enter the lower surface of the disk medium 12, that is, the recording surface 12 </ b> B side via the disk opening 20.

  The disc receiving member 82 is supported by a pair of guide pins 58 of the lower shell 26 so as to be movable up and down. The disc receiving member 82 descends as the inner rotor 60 rotates in the arrow D direction, and rotates in the arrow D direction. It is set as the structure which does not interfere with the outer periphery receiving convex part 70. FIG. Although details are omitted, the corresponding circumferential end portions of the disk outer periphery receiving portion 82A and the outer periphery receiving protrusion 70 are formed in a tapered shape that overlaps vertically, and the disk outer periphery receiving portion is rotated by the rotation of the inner rotor 60 in the direction of arrow D. The configuration is such that 82 </ b> A is buried under the outer periphery receiving projection 70. In the transition process from the opened state of the head opening 16 to the closed state, the reverse operation of the above description is performed.

(Disk holding mechanism configuration)
The disk holding mechanism 22 includes a disk pressing member 84. The disc pressing member 84 is a pair of support shaft portions 84A that are rotatably supported by the pair of bearing portions 54 of the lower shell 26, and a pair of support shaft portions 84A that are formed integrally with the pair of support shaft portions 84A. And an arm portion 84B. Further, the arm portion 84B is provided with a pair of left and right disc contact portions 84C that contact the upper surface of the disc medium 12. The disc contact portion 84C can be made of rubber or the like which is a separate member with respect to the support shaft portion 84A and the arm portion 84B which are integrally formed of a resin material or the like.

  The disk pressing member 84 is a disk that causes the arm portion 84B to protrude into the disk housing portion 50 (disk opening 20) and the disk contact portion 84C to contact the upper surface of the disk medium 12 by rotating around the support shaft portion 84A. The pressing position, the disc rotation allowing position where the disc contact portion 84C is separated from the upper surface of the disc medium 12 while the arm portion 84B extends into the disc accommodating portion 50, and the disc insertion / removal where the arm portion 84B is retracted from the disc accommodating portion 50. The possible position can be selectively taken.

  As shown in FIG. 2, the disk holding mechanism 22 is provided with a disk pressing spring 86 for urging the disk pressing member 84 to the disk pressing position side, and an operation protrusion 88A provided in the case 14 so as to be slidable only in the left-right direction. And a lock member 88 that is exposed from the lock operation window 36. The disc presser spring 86 is a torsion coil spring. One end of the disc presser spring 86 is engaged with the arm portion 84 </ b> B, and the other end is engaged with the engagement protrusion 88 </ b> B of the lock member 88. As a result, the disc pressing member 84 is normally positioned at the disc pressing position by the urging force of the disc pressing spring 86 and holds the disc medium 12.

  The disk pressing member 84 is moved from the disk pressing position to the disk rotation allowable position with the operation of the first shutter 64 opening the head opening 16. Specifically, the annular wall portion 62 of the inner rotor 60 is provided with a portion whose wall height is higher than other portions (not shown), and this portion is accompanied by the rotation of the inner rotor 60 in the direction of arrow D. Thus, by lifting the arm portion 84B upward in the notch portion 34, the disc pressing member 84 is moved from the disc pressing position to the disc rotation allowable position. The state in which the disk pressing member 84 is positioned at the disk rotation allowable position is maintained with the head opening 16 being opened. Thus, the disc pressing member 84 is prevented from interfering with the rotating disc medium 12.

  The lock member 88 engages with the other end of the disk presser spring 86 when the operation protrusion 88A is positioned at the left end of the lock operation window 36, but the disk 88 when the operation protrusion 88A is positioned at the right end of the lock operation window 36. The engagement with the other end of the presser spring 86 is released. Therefore, by operating the operation protrusion 88A and moving the lock member 88 to the right, the urging force of the disk pressing spring 86 does not act on the disk pressing member 84. If the disk pressing member 84 is manually moved to the disk insertion / removal position in this state, the disk pressing member 84 will not return to the disk pressing position even if the hand is released from the disk pressing member 84, and the disk medium 12. The disc can be easily inserted into, removed from (removed from) the disc housing 50, and replaced.

[Configuration of cleaning member]
As shown in FIGS. 1 to 3, a cleaning member 92 is provided on the upper surface of the second shutter 74 except for one end 80 </ b> A of the second convex portion 80 that forms the disc inner periphery receiving portion 90. The cleaning member 92 is composed of a non-woven fabric formed in a plan view shape that is a substantially arc shape of the second convex portion 80, and is fixedly attached to the upper surface of the second convex portion 80 by adhesion or the like.

  As shown in FIG. 4 (A), the cleaning member 92 has the disc media 12 in a state where the second convex portion 80 and the first convex portion 68 abut the circumferential end portions to form the disc inner periphery receiving portion 90. The chucking area 12C is slightly touched in the circumferential direction. In this state, the cleaning member 92 may be slightly compressed in the thickness direction. In this state, no gap is generated between the first convex portion 68 and the chucking area 12C. Accordingly, the cleaning member 92 is in contact with the chucking area 12C of the disk medium 12 together with the first convex portion 68 and the second convex portion 80 in the closed state of the head opening portion 16, and the dust that has passed through the chucking opening portion 42. A disc inner periphery receiving portion 90 for preventing the intrusion of a disc is configured.

  The cleaning member 92 wipes (wipes) the lower surface of the disk medium 12, that is, a part of the recording surface 12B, as the second shutter 74 rotates in the direction of arrow E. Specifically, as shown in FIG. 5, the cleaning member 92 is within a predetermined range (from the inner edge of the recording surface 12B beyond the radial intermediate portion within the range in which the second shutter 74 moves from the closed position to the open position). This is a configuration for wiping the hatched area in FIG.

  The cleaning member 92 wipes the same range when the second shutter 74 moves from the open position to the closed position. Therefore, the disc cartridge 10 does not include a mechanism for preventing the second convex portion 80 from interfering with the recording surface 12B of the disc medium 12.

  Further, when the first shutter 64 and the second shutter 74 open and close the head opening 16, the disk medium 12 is supported by the first convex portion 68 and the outer peripheral receiving convex portion 70, so that the cleaning member 92 is recorded. The recording surface 12B is wiped without being pressed against the surface 12B. For this reason, the cleaning member 92 does not perform the wiping action of wiping off the dust adhering to the recording surface 12B, but weakens the adhering force of the dust adhering to the recording surface 12B (physical rather than the adhering state). To peel off). As a result, the dust attached to the recording surface 12B is easily removed by the centrifugal force accompanying the rotation of the disk medium 12, the surface airflow, or the action of both, and the cleaning member 92 wipes the recording surface 12B. The recording surface 12B is not damaged.

  Further, as shown in FIG. 4B, the cleaning member 92 is in a state where the rotating spindle shaft 94 of the drive device chucks the disk medium 12 in the center hole 12A and the chucking area 12C of the disk medium 12, that is, In the rotational state in which the disk medium 12 is moved (floated) upward in the axial direction, the disk medium 12 is separated from the recording surface 12B. That is, as described above, the cleaning member 92 is substantially flush with the upper surface of the first convex portion 68, or in a configuration in which the cleaning member 92 abuts on the disk medium 12 in a compressed state, the amount of compression is greater than the flying height of the disk medium 12. It has a small configuration.

  Next, the operation of this embodiment will be described.

  In the disk cartridge 10 configured as described above, the first shutter 64 and the second shutter 74 are positioned at the closed position to block the head opening 16 when not in use, such as during storage or transportation. Further, the disk pressing member 84 presses the disk medium 12 downward by the urging force of the disk pressing spring 86 to prevent the disk medium 12 from rattling.

  The first convex portion 68 and the second convex portion 80 having the cleaning member 92 form an annular disc inner periphery receiving portion 90, and the upper end surface of the disc inner periphery receiving portion 90 is a chucking area of the disc medium 12. It is in contact with 12C. Further, the outer periphery receiving convex portion 70 and the disk outer periphery receiving portion 82A of the disk receiving member 82 form an annular shape and abut on the radially outer portion of the recording surface 12B of the disk medium 12. As a result, the intrusion of dusts from the inner peripheral side of the disc medium 12 to the recording surface 12B side and the intrusion of dusts from the outer peripheral side of the disc media 12 to the recording surface 12B side are prevented, and the recording of the disc media 12 is performed. The surface 12B is prevented from contacting the first shutter 64 and the second shutter 74.

  When this disc cartridge 10 is used, that is, when information is recorded on the disc medium 12 or when information recorded on the disc medium 12 is reproduced, the disc cartridge 10 is loaded into the drive device along the direction of arrow A. . With this loading operation (relative movement between the disk cartridge 10 and the drive device), the opening / closing member of the drive device engages with the operation protrusion 66 of the inner rotor 60 and moves the operation protrusion 66 rearward.

  Then, the inner rotor 60, that is, the first shutter 64 rotates in the direction of arrow D, and the second shutter 74 rotates in the direction of arrow E in conjunction with this. 7 and FIG. 8, when the operation projection 66 moves to the rear end of the shutter operation window 46, the head opening 16 is completely opened as shown in FIG.

  At this time, the cleaning member 92 provided on the upper end surface of the second convex portion 80 of the second shutter 74 wipes the recording surface 12 </ b> B of the disk medium 12 by rotating in the direction of arrow E.

  Next, in the drive device, the disk cartridge 10 is positioned by inserting positioning pins into the reference holes 52A and 53A of the bottom plate 38, for example. In this positioning state, the rotating spindle shaft of the drive device enters from the chucking opening 42, and the rotating spindle shaft chucks the center hole 12 </ b> A (and chucking area 12 </ b> C) of the disk medium 12 to remove the disk medium 12. While being held, the first shutter 64 is separated from the upper surface. When the rotary spindle shaft rotates, the disk medium 12 is driven to rotate in the case 14 in a non-contact manner. On the other hand, the recording / reproducing head of the drive device enters from the head opening 16. With this recording / reproducing head, information is recorded on the recording surface 12B of the disk medium 12, or information recorded on the recording surface 12B is reproduced (the disk medium 12 is used).

  After use of the disk medium 12, the disk cartridge 10 is ejected from the drive device. With this discharging operation, the opening / closing member of the drive device engages with the operation protrusion 66 of the inner rotor 60 and moves the operation protrusion 66 forward. Then, the inner rotor 60, that is, the first shutter 64 rotates in the direction opposite to the arrow D, and the second shutter 74 rotates in the direction opposite to the arrow E in conjunction with this. When the operation projection 66 moves to the front end of the shutter operation window 46 through the state shown in FIGS. 8 and 7, the head opening 16 returns to the completely closed state as shown in FIG.

  At this time, the cleaning member 92 provided on the upper end surface of the second convex portion 80 of the second shutter 74 wipes the recording surface 12 </ b> B of the disk medium 12 by rotating in the direction opposite to the arrow E. Then, as the first shutter 64 and the second shutter 74 close the head opening 16, the first convex portion 68 and the second convex portion 80 abut each other in the circumferential direction, and the inner periphery of the disk. A receiving portion 90 is formed, and the upper end surface of the inner periphery receiving portion 90 of the disc comes into contact with the chucking area 12 </ b> C of the disc medium 12. Thus, the disk cartridge 10 returns to the state before use.

  By the way, when the head opening 16 is opened in the drive device, dust may enter between the bottom plate 38 and the lower surface (recording surface 12B) of the disk medium 12 in the case 14. The dusts may adhere to the recording surface 12B of the disk medium 12 due to static electricity or the like when the disk cartridge 10 is not used.

  Here, since the cleaning member 92 following the operation of the second shutter 74 wipes a part of the inner peripheral side of the recording surface 12B of the disk medium 12 with the opening operation of the head opening 16, the recording of the disk medium 12 is performed. The dust attached to the surface 12B is easily removed from the recording surface 12B. For this reason, the dust adhering to the recording surface 12B is also recorded on the recording surface 12B by the centrifugal force and the surface air flow even in the inner peripheral side of the recording surface where the centrifugal force accompanying the rotation of the disk medium 12 and the surface air flow is weak. Effectively removed from.

  In particular, since the cleaning member 92 that wipes the recording surface 12B by using the opening operation of the head opening 16 of the second shutter 74 that rotates about the support shaft 52 eccentric from the axis of the disk medium 12 is provided. For example, since the cleaning member 92 wipes the recording surface 12B from the radially inner side to the outer side of the disk medium 12, dusts can be more effectively removed by the centrifugal force and the surface air flow directed radially outward. it can.

  Thus, in the disk cartridge 10 according to the present embodiment, dust attached to the recording surface 12B of the disk medium 12 can be removed. Further, since the cleaning member 92 is configured to lightly wipe the recording surface 12B in a state where the pressing force against the disk medium 12 is hardly applied, the recording surface 12B is not damaged.

  Further, in the disc cartridge 10, since the cleaning member 92 is made of a non-woven fabric, even if the recording surface 12B of the disc medium 12 is wiped without being strongly pressed, dust attached to the recording surface 12B is surely removed. It is easy to remove.

  Further, in the disk cartridge 10, since the cleaning member 92 is not in contact with the disk medium 12 that is rotationally driven, the cleaning member 92 positioned at the position shown in FIG. It is prevented to keep touching only a specific range. That is, it is possible to prevent the cleaning member 92 from coming into contact with the recording surface 12B of the disk medium 12 rotating at high speed and causing damage.

  Furthermore, as the head opening 16 is opened, the position of contact with the disk medium 12 (interfering in plan view) is changed from the chucking area 12C to the recording surface 12B positioned radially outward from the chucking area 12C. Since the cleaning member 92 is provided on the second convex portion 80 (second shutter 74) to be changed, a mechanism (for example, that prevents the second convex portion 80 from interfering with the disk medium 12 required when no cleaning member is provided) In addition, a mechanism for lifting the first shutter with the opening and closing of the head opening is not required. Thereby, the structure of the disk cartridge 10 is simplified.

  In the above-described embodiment, the preferable configuration in which the cleaning member 92 is provided on the second convex portion 80 is shown. However, the present invention is not limited to this, and for example, the second shutter 74 and the second shutter 74 can be used together. The cleaning member 92 may be provided on the outer surface of the recording surface 12B to wipe the outer periphery of the recording surface 12B, and the disc inner periphery receiving portion 90 is not provided (the disc opening 20 is not provided, and the chucking opening 42 is the head). The cleaning member 92 may be provided on the upper surface of the second shutter 74 in a configuration that is opened and closed together with the opening 16.

  Moreover, in the said embodiment, although the cleaning member 92 showed the preferable structure which consists of nonwoven fabrics, this invention is not limited by the material of the cleaning member 92, etc.

  Furthermore, in the above-described embodiment, the configuration in which the disk opening 20 is provided in the case 14 is illustrated, but the present invention is not limited to this, and for example, the top plate 28 may have no opening. The head opening 16 or the access opening 44 may be provided on the top plate 28 instead of the disk opening 20. In the latter case, the shutter mechanism 18 or another shutter mechanism can be provided between the top plate 28 and the disk medium 12. In the above embodiment, the chucking opening 42 is always open. However, the present invention is not limited to this, and the chucking opening 42 together with the head opening 16 includes the first shutter 64 and the second shutter 64. The structure closed by the shutter 74 may be sufficient. However, the present invention is preferably applied to a configuration having the disk opening 20 or the chucking opening 42 being always open.

  Further, in the above embodiment, the diameter of the disk medium 12 is approximately 120 mm. However, the present invention is not limited to this, and the present invention can be applied to the disk cartridge 10 including the disk medium 12 of any size. Needless to say. Further, for example, the disk medium 12 may be a double-sided recording type as well as a single-sided recording type, and may be a reproduction-only disk medium that makes it impossible for the user to record information. Therefore, the recording / reproducing head of the drive device described above may have only a recording function or only a reproducing function. Further, the disk cartridge 10 according to the present invention is not limited to the one having the disk medium 12 as a constituent element. For example, the disk cartridge 12 may contain the disk medium 12 when used.

1 is a perspective view showing an external appearance of a disk cartridge according to an embodiment of the present invention. 1 is an exploded perspective view of a disc cartridge according to an embodiment of the present invention. FIG. 3 is an exploded perspective view of a shutter mechanism constituting the disk cartridge according to the embodiment of the present invention. 1A and 1B are views showing a contact state of a cleaning member constituting a disk cartridge according to an embodiment of the present invention with a disk medium, wherein FIG. 1A is a cross-sectional view showing a closed state of a head opening, and FIG. It is sectional drawing which shows the open state of a part. FIG. 5 is a schematic bottom view showing a wiping range of a disk medium recording surface by a cleaning member constituting the disk cartridge according to the embodiment of the present invention. FIG. 5 is a schematic plan view showing a closed state of a head opening by a shutter mechanism constituting a disk cartridge according to an embodiment of the present invention. FIG. 5 is a schematic plan view showing a process of closing or opening a head opening of a shutter mechanism constituting a disk cartridge according to an embodiment of the present invention. FIG. 8 is a schematic plan view showing a state different from FIG. 7 in the process of closing or opening the head opening of the shutter mechanism constituting the disk cartridge according to the embodiment of the present invention. FIG. 3 is a schematic plan view showing an open state of a head opening by a shutter mechanism that constitutes a disk cartridge according to an embodiment of the present invention. 2A and 2B are diagrams showing a conventional disk cartridge, in which FIG. 1A is a plan view showing a closed state of a head opening by a shutter mechanism, and FIG. 2B is a plan view showing an opened state of a head opening by a shutter mechanism.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Disc cartridge 12 Disc media 12A Center hole 12B Recording surface 14 Case 16 Head opening 64 1st shutter 68 1st convex part 74 2nd shutter 80 2nd convex part 90 Disc inner periphery receiving part 92 Cleaning member

Claims (4)

A case that rotatably accommodates a disk-shaped disk medium, and a head opening for accessing the recording surface of the disk medium;
A shutter that is disposed on the recording surface side of the disk medium in the case, and that opens and closes at least a part of the head opening by rotating around an axis eccentric from the axis of the disk medium;
The recording surface of the disk medium is provided at a portion located radially inward of the recording surface of the disk medium when the head opening of the shutter is closed, and the shutter opens and closes the head opening. A cleaning member for wiping off,
Disc cartridge with A case in which a disk-shaped disk medium having a center hole in the shaft center part is rotatably accommodated, and a head opening is provided for the head of the drive device to access the recording surface of the disk medium;
A first shutter that is provided on the recording surface side of the disk medium in the case and rotates coaxially with the axis of the disk medium to open and close a part of the head opening;
A second shutter that is provided on the recording surface side of the disk medium in the case and rotates around an axis different from the first shutter to open and close a part of the remainder of the head opening;
An arc-shaped first convex portion provided on the first shutter and an arc-shaped second convex portion provided on the second shutter, and the first convex portion in a closed state of the head opening A disc inner periphery receiving portion that is formed in an annular shape by abutting the circumferential end portion with the second convex portion and abuts against a surface around the center hole of the disc medium;
A cleaning member that is provided on the second convex portion and wipes the recording surface of the disk medium in accordance with an operation in which the second shutter opens and closes the head opening;
Disc cartridge with 3. The disk cartridge according to claim 1, wherein the cleaning member is made of a non-woven fabric. 4. The disk cartridge according to claim 1, wherein the cleaning member is separated from the recording surface when the disk medium is rotationally driven by a drive device. 5.

Images