JP2006092733A - Disk cartridge - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a thin disk cartridge having simple shutter constitution, in which the costs are reduced. <P>SOLUTION: The disk cartridge is provided with: a disk accommodation part; first and second shutters provided to the bottom part of the disk accommodation part; a disk receiving part engaged with the shutters and holds a disk when the shutters are in a closed state; and a rotational member having a notch positioned at an opening part for a head when the shutter is in an open state. The shutter includes a disk holding part for holding the center of the disk to be offset with respect to the center of the disk accommodation part so that a sidewall of the disk accommodation part abuts against the outer side surface of the disk, in an area where the notch is positioned, when the shutter is in the closed state. The inner circumference of an area where the disk receiving part is brought into contact with the disk is on a circumference having the center at the position that is offset with respect to the center of the disk accommodation part. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a disk cartridge for storing a disk-shaped signal recording medium such as an optical disk or a magnetic disk in a rotatable state.

  Conventionally, a disk cartridge for holding a disk-shaped signal recording medium has been proposed.

  For example, Patent Document 1 discloses that a disc-shaped recording medium (hereinafter referred to as a disc) having a signal recording surface on one side or both sides is provided in a disc storage portion provided inside a cartridge body composed of an upper half and a lower half. A disc cartridge is disclosed which is stored in a fully covered form. The cartridge body is formed with a chucking opening for chucking the disk by the spindle motor turntable and clamper, and a head opening for the head to reproduce and record signals on the disk. . The chucking opening and the head opening are continuous, and when carrying and carrying the cartridge, dust easily enters from these openings and fingerprints are likely to adhere to the disk. For this reason, a shutter that covers these openings is formed in the disc cartridge.

  However, in the case of a disc cartridge of this structure, since the disc cartridge is inserted into the disc device and recording / reproducing is performed on the disc, the surface shake during disc rotation, disc warpage, and positioning error of the cartridge to the disc device It is necessary to secure a space for allowing the disc in a space for storing a disk formed between the upper half and the lower half. For this reason, there has been a problem that the thickness of the cartridge main body becomes large.

  The lower half is provided with a spindle motor turntable opening and a head opening, and the upper half is provided with a clamper opening. It is necessary to have a U-shape that continues from half to bottom half. However, since the shutter having such a shape is expensive, the manufacturing cost of the disk cartridge is increased.

Furthermore, in the case of a disk with a metal hub, it is possible to attract the disk without magnetic backlash, but in the case of an optical disk without a hub such as a CD or DVD, the disk is generally not fixed in the cartridge and is free. Is in a state. For this reason, there is a problem in that the shutter opens in the disk device, and dust that has entered the cartridge from the opening adheres to the disk. In addition, there is a problem that the signal recording surface of the disk is damaged due to the play of the disk, or dust is generated due to collision between the disk and the inner wall of the cartridge, and the dust adheres to the disk.
Japanese Patent Laid-Open No. 9-153264

  An object of the present invention is to solve the above-described problems and to reduce the cost of the disk cartridge as a simple shutter configuration, particularly in a cartridge that accommodates a disk having a recording surface only on one side. It is another object of the present invention to provide a disk cartridge that can hold a disk in the disk cartridge, eliminate rattling, and reduce the adhesion of dust to the disk. It is another object of the present invention to provide a disc cartridge excellent in design by utilizing an exposed disc label surface.

  The disc cartridge of the present invention has a disc opening and a bottom, and is capable of rotating a disc having first and second surfaces, and exposes the first surface from the disc opening to the outside. And a head for recording and / or reproducing a signal is provided on the bottom of the disk storage section, a chucking opening provided at the bottom of the disk storage section for chucking the disk from the outside. A cartridge main body including a head opening provided at the bottom of the disk storage unit for accessing the surface of the disk storage unit, provided on the bottom of the disk storage unit, the head opening to the outside, First and second shutters for opening or closing, and held on the first and second shutters in the disk storage unit, And a rotating member that rotates along with the opening and closing of the first and second shutters. The rotating member contacts the outer peripheral edge of the second surface of the disc when the first and second shutters are closed, and receives the disc and the first and second discs. A notch provided in the disc receiving portion so as to be positioned at the head opening when the shutter is open, and the disc storage portion has a side wall provided along the outer periphery of the bottom portion. When the first and second shutters are in the closed state, the disk is arranged such that the outer surface of the disk contacts the side wall of the disk storage portion in the region where the notch of the rotating member is located. The first and second shutters have a disk holding part that holds the center of the disk offset with respect to the center of the disk storage part. The inner periphery of the region where the second side of the disc contacts located on a circle centered on a position which is offset relative to the center of the disc storage portion.

  In a preferred embodiment, when the first and second shutters are closed, the center of the disk coincides with the center of the circumference.

  In a preferred embodiment, when the first and second shutters are closed, the distance between the center of the disk and the center of the disk storage portion is about 0.5 to 1.5 mm.

  In a preferred embodiment, a portion of the side wall of the disc storage portion with which the outer surface of the disc abuts has a radius of curvature substantially equal to the radius of curvature of the disc.

  In a preferred embodiment, a portion of the side wall of the disc storage portion where the outer surface of the disc does not contact has a radius of curvature larger than the radius of curvature of the disc.

  The disc cartridge of the present invention has a disc opening and a bottom, and is capable of rotating a disc having first and second surfaces, and the first surface is exposed to the outside from the disc opening. A disc housing portion for exposing the disc; a chucking opening provided at a bottom portion of the disc housing portion for chucking the disc from the outside; and a head for recording and / or reproducing signals. A cartridge body including a head opening provided at the bottom of the disk storage portion for accessing the second surface of the disk storage portion, and provided on the bottom portion of the disk storage portion, the head opening to the outside Held on the first and second shutters for opening or closing, and the first and second shutters in the disk storage portion. And a rotating member that rotates in conjunction with the opening and closing of the first and second shutters. The rotating member includes a disc receiving portion provided to receive an outer peripheral edge portion of the second surface of the disc when the first and second shutters are closed, and the first and second shutters. The disc receiving portion has a notch provided in the disc receiving portion so as to be positioned at the head opening when the shutter is open, and the disc storage portion has a side wall provided along the outer periphery of the bottom portion. When the first and second shutters are in a closed state, the disk is set so that the outer surface of the disk comes into contact with the side wall of the disk storage portion in the region where the notch of the rotating member is located. One of the first and second shutters has a disk holding part for holding the disk while being urged, and the urging to the disk is a shutter having the disk holding part. Data is performed by the elastic deformation.

  In a preferred embodiment, the cartridge body has a recess at the bottom of the disc storage portion, and the shutter having the disc holding portion is elastically deformed in the vicinity of a side wall that defines the recess.

  The disc cartridge of the present invention has a disc opening and a bottom, and is capable of rotating a disc having first and second surfaces, and the first surface is exposed to the outside from the disc opening. A disc housing portion for exposing the disc; a chucking opening provided at a bottom portion of the disc housing portion for chucking the disc from the outside; and a head for recording and / or reproducing signals. A cartridge body including a head opening provided at the bottom of the disk storage portion for accessing the second surface of the disk storage portion, and provided on the bottom portion of the disk storage portion, the head opening to the outside And a shutter for opening or closing, and an arch-shaped side surface, and the arch-shaped side surface is stored in the disk storage unit. Wherein and a first state and stopper member held movably in the cartridge body so as to obtain take a second state in which no projecting onto said disc projecting onto disks.

  In a preferred embodiment, in the drop-off prevention member, the arched side surface extends along a longitudinal direction, and the drop-off prevention member moves relative to the cartridge body in a direction perpendicular to the longitudinal direction. By doing so, the first state and the second state can be taken.

  In a preferred embodiment, in the drop-off prevention member, the arch-shaped side surface extending in the longitudinal direction extends along the longitudinal direction, and the drop-off prevention member rotates about an axis parallel to the longitudinal direction. The first state and the second state can be taken.

  In a preferred embodiment, in the drop-off prevention member, the side surface that is recessed in the arch shape extends along the longitudinal direction, and the drop-off prevention member is substantially in the vicinity of one end in the longitudinal direction and substantially the same as the disc. The first state and the second state can be taken by rotating horizontally.

  In a preferred embodiment, the other end in the longitudinal direction of the drop-off preventing member is engaged with the cartridge body.

  The disc cartridge of the present invention has a disc opening and a bottom, and is capable of rotating a disc having first and second surfaces, and the first surface is exposed to the outside from the disc opening. A disc housing portion for exposing the disc; a chucking opening provided at a bottom portion of the disc housing portion for chucking the disc from the outside; and a head for recording and / or reproducing signals. A cartridge body including a head opening provided at the bottom of the disk storage portion for accessing the second surface of the disk storage portion, and provided on the bottom portion of the disk storage portion, the head opening to the outside A shutter for opening or closing, an extraction history hole provided in the cartridge body, and a small opening of the extraction history hole A lid covering the part, movable to the cartridge body so as to be able to take a first state protruding on the disk housed in the disk housing portion and a second state not projecting on the disk. A drop-off prevention member held in a state, and when the drop-off prevention member shifts from the first state to the second state, the drop-off prevention member detaches the lid member from the take-out history hole.

  In a preferred embodiment, the drop-off prevention member takes the first state and the second state by rotating substantially horizontally with the disk about one end in the longitudinal direction thereof, and the drop-off prevention member. And the center of the extraction history hole coincide with each other.

  In a preferred embodiment, the lid member is formed in a columnar shape, includes a connection portion connected to a side surface of the take-out history hole, and a convex portion for engaging with the drop-off preventing member, and the drop-off portion. The prevention member has a concave portion that engages with the convex portion of the lid member.

  In a preferred embodiment, the recess of the drop-off prevention member is provided on a center of rotation of the drop-off prevention member, and the lid member is rotated by rotating the drop-off prevention member, and the connection The cover member is broken and the lid member is detached from the take-out history hole.

  The disc cartridge of the present invention has a disc opening and a bottom, and is capable of rotating a disc having first and second surfaces, and the first surface is exposed to the outside from the disc opening. A disk storage section for storing the disk, a chucking opening provided at the bottom of the disk storage section for chucking the disk from the outside, and a head for recording and / or reproducing signals. A cartridge main body including a head opening provided at the bottom of the disk storage portion for accessing the second surface, and is provided on the bottom of the disk storage portion; First and second shutters for opening or closing, held on the first and second shutters in the disk storage unit, Rotating members engaged with the first and second shutters so that the first and second shutters open and close by rotating in the disk storage portion, and the first and second shutters In the closed state, a disc holding portion is provided for holding the disc so as not to contact the signal recording area provided on the second surface of the disc.

  In a preferred embodiment, in a state where the first and second shutters are closed, a distance from a point close to the signal recording area closer to the center of the disk than the signal recording area to the center of the disk is set. Rin, where Rout is the distance from the signal recording area close to the signal recording area outside the disk to the center of the disk, and S is the height of the space below the second surface A first circle of radius Rout on the second surface, a second circle of radius (Rout-1.2S) on a plane parallel to the second surface by a distance of 0.3S, and When a third circle having a radius (Rout-16.2S) on a plane parallel to the second surface by a distance S is used, the first circle and the second circle are the bottom surface and the top surface. 1 frustoconical region In addition, from the region of the second truncated cone having the second circle and the third circle as the bottom surface and the top surface, a circle having a radius Rin from the center of the disk is used as the bottom surface, and a cylindrical region having a height S is excluded. There is space in the area.

  In a preferred embodiment, the S is 1 mm, the Rin is 20 mm, and the Rout is 59 mm.

  In a preferred embodiment, the rotating member includes a disc receiving portion that receives the disc in contact with an outer peripheral edge portion of the second surface of the disc when the first and second shutters are closed. The disc receiving portion has a notch provided in the disc receiving portion so as to be positioned at the head opening when the first and second shutters are in an open state, and the disc storage portion extends along an outer periphery of the bottom portion. A side wall provided on the side wall of the disc storage portion in a region where the notch of the rotating member is located when the first and second shutters are closed. The center of the disk is offset and held with respect to the center of the disk storage portion so that the outer surface of the disk contacts.

  In a preferred embodiment, the disk receiving portion of the rotating member is positioned so as not to block the space when the first and second shutters are closed.

  In a preferred embodiment, an inner periphery of a region where the disc receiving portion of the rotating member contacts the second surface of the disc is on a circumference centered at a position offset with respect to the center of the disc storage portion. It is in.

  In a preferred embodiment, when the first and second shutters are closed, the center of the disk coincides with the center of the circumference.

  In a preferred embodiment, when the first and second shutters are closed, the distance between the center of the disk and the center of the disk storage portion is about 0.5 to 1.5 mm.

  The disc cartridge of the present invention has a disc opening and a bottom, and is capable of rotating a disc having first and second surfaces, and the first surface is exposed to the outside from the disc opening. A disc housing portion for exposing the disc; a chucking opening provided at a bottom portion of the disc housing portion for chucking the disc from the outside; and a head for recording and / or reproducing signals. A cartridge body including a head opening provided at the bottom of the disk storage portion for accessing the second surface of the disk storage portion, and provided on the bottom portion of the disk storage portion, the head opening to the outside The first and second shutters for opening or closing are held on the first and second shutters in the disk storage portion. Rotating members engaged with the first and second shutters so that the first and second shutters are opened and closed by rotating in the disk storage portion, and the first and second shutters When the disk is closed, a disk holding portion is provided to hold the disk so as not to contact a clamp area provided on the second surface of the disk.

  In a preferred embodiment, the disc holding portion holds the disc so as not to contact a protruding ring provided on the second surface of the disc in the clamp region. Further, in a state where the first and second shutters are closed, the clamp region and a region between the clamp region and the center hole are separated from the edge of the center hole by 0.1 mm or more. The disc is held so that it does not come into contact with the area or the area between the clamp area and the clamp area and the signal recording area and within 2 mm from the edge of the clamp area.

  The disc cartridge of the present invention has a disc opening and a bottom, and is capable of rotating a disc having first and second surfaces, and the first surface is exposed to the outside from the disc opening. A disc housing portion for exposing the disc; a chucking opening provided at a bottom portion of the disc housing portion for chucking the disc from the outside; and a head for recording and / or reproducing signals. A cartridge body including a head opening provided at the bottom of the disk storage portion for accessing the second surface of the disk storage portion, and provided on the bottom portion of the disk storage portion, the head opening to the outside The first and second shutters for opening or closing are held on the first and second shutters in the disk storage portion. A rotating member engaged with the first and second shutters so that the first and second shutters are opened and closed by rotating in the disk storage portion; The shutter has first and second joint portions that are in contact with each other so as to overlap in the thickness direction in two non-continuous regions, and the first joint portion of the first shutter and the second joint portion The vertical relationship in the thickness direction between the first joint portion of the shutter and the second joint portion of the first shutter and the second joint portion of the second shutter in the thickness direction. It is the reverse of the relationship.

  In a preferred embodiment, the shutters of the first and second shutters include a side wall rising from the vicinity of the first joint portion, and a third joint that abuts each other so as to overlap in the thickness direction at an upper portion of the side wall. The first joint and the third joint of one of the first and second shutters are the first joint and the third of the other of the first and second shutters. Abutting to sandwich the joint portion.

  The disc cartridge of the present invention has a disc opening and a bottom, and is capable of rotating a disc having first and second surfaces, and the first surface is exposed to the outside from the disc opening. A disc housing portion for exposing the disc; a chucking opening provided at a bottom portion of the disc housing portion for chucking the disc from the outside; and a head for recording and / or reproducing signals. A cartridge body including a head opening provided at the bottom of the disk storage portion for accessing the second surface of the disk storage portion, and provided on the bottom portion of the disk storage portion, the head opening to the outside The first and second shutters for opening or closing are held on the first and second shutters in the disk storage portion. A rotating member engaged with the first and second shutters so that the first and second shutters are opened and closed by rotating in the disk storage portion; The shutter has a hole in a region corresponding to the center hole of the disk in the closed state, and the first and second shutters in the region where the first and second shutters in the vicinity of the hole contact each other. One has a convex part, and the other of the first and second shutters has a concave part engaged with the convex part.

  The disc cartridge of the present invention has a disc opening and a bottom, and is capable of rotating a disc having first and second surfaces, and the first surface is exposed to the outside from the disc opening. A disc housing portion for exposing the disc; a chucking opening provided at a bottom portion of the disc housing portion for chucking the disc from the outside; and a head for recording and / or reproducing signals. A cartridge body including a head opening provided at the bottom of the disk storage portion for accessing the second surface of the disk storage portion, and provided on the bottom portion of the disk storage portion, the head opening to the outside The first and second shutters for opening or closing are held on the first and second shutters in the disk storage portion. A rotating member engaged with the first and second shutters so that the first and second shutters are opened and closed by rotating in the disk storage portion; Has a plurality of disk holding portions for holding the disk in contact with the vicinity of the outer surface of the disk when the first and second shutters are in a closed state, and the first and second shutters are The rotating member includes a side wall that abuts against at least one of the plurality of disk holding portions so as to prevent at least one of the plurality of disk holding portions from bending in the radial direction of the disk when in the closed state. .

  The disc cartridge of the present invention has a disc opening and a bottom, and is capable of rotating a disc having first and second surfaces, and the first surface is exposed to the outside from the disc opening. A disc housing portion for exposing the disc; a chucking opening provided at a bottom portion of the disc housing portion for chucking the disc from the outside; and a head for recording and / or reproducing signals. A cartridge body including a head opening provided at the bottom of the disk storage portion for accessing the second surface of the disk storage portion, and provided on the bottom portion of the disk storage portion, the head opening to the outside The first and second shutters for opening or closing are held on the first and second shutters in the disk storage portion. A rotating member engaged with the first and second shutters so that the first and second shutters are opened and closed by rotating in the disk storage portion; A first protrusion is provided at the bottom of the disk storage portion along the periphery of the king opening and the head opening, and the first and second shutters are provided at the bottom of the disk storage portion. Each of the opposing surfaces has a recess for receiving the first protrusion of the bottom.

  The disc cartridge of the present invention has a disc opening and a bottom, and is capable of rotating a disc having first and second surfaces, and the first surface is exposed to the outside from the disc opening. A disc housing portion for exposing the disc; a chucking opening provided at a bottom portion of the disc housing portion for chucking the disc from the outside; and a head for recording and / or reproducing signals. A cartridge body including a head opening provided at the bottom of the disk storage portion for accessing the second surface of the disk storage portion, and provided on the bottom portion of the disk storage portion, the head opening to the outside The first and second shutters for opening or closing are held on the first and second shutters in the disk storage portion. Rotating members engaged with the first and second shutters so that the first and second shutters open and close by rotating in the disk storage unit, and are stored in the disk storage unit. In addition, a first drop-off preventing member that can take a first state in which a part of the disk protrudes on the disk and a second state that does not protrude onto the disk, and a second that can take only the first state. The cartridge body has an engaging means that engages with both the first drop-off prevention member and the second drop-off prevention member so that the drop-off prevention member can be mounted.

  The disc cartridge of the present invention has a disc opening and a bottom, and is capable of rotating a disc having first and second surfaces, and the first surface is exposed to the outside from the disc opening. A disc housing portion for exposing the disc; a chucking opening provided at a bottom portion of the disc housing portion for chucking the disc from the outside; and a head for recording and / or reproducing signals. A cartridge body including a head opening provided at the bottom of the disk storage portion for accessing the second surface of the disk storage portion, and provided on the bottom portion of the disk storage portion, the head opening to the outside The first and second shutters for opening or closing are held on the first and second shutters in the disk storage portion. A rotating member engaged with the first and second shutters so that the first and second shutters are opened and closed by rotating in the disk storage portion; The shutter and the rotating member are arranged such that the first and second shutters are sandwiched between the rotating member and the bottom of the disk storage portion, and the first shutter and the rotation member are arranged at the bottom of the disk storage portion. The cartridge body has a second protrusion having a height substantially equal to the thickness of the first and second shutters.

  The disc drive apparatus of the present invention loads any one of the disc cartridges containing the disc, records information on the disc, and / or reproduces information from the disc.

  Further, the disk drive device of the present invention includes a driving unit for rotating the disk, a head for recording information on the disk and / or reproducing information from the disk, and the disk. And a support structure for supporting the disc cartridge containing the disc at a predetermined position with respect to the driving means, and the disc cartridge shutter is opened, and the disc can be rotated within the disc accommodating portion of the disc cartridge. And a shutter opening / closing mechanism for releasing the holding operation of the disk in the disk holding portion of the cartridge.

  In a preferred embodiment, the disk drive device further includes a clamper for fixing the disk to the driving means.

  In a preferred embodiment, the support structure includes a positioning pin for determining the position of the disk cartridge.

  The disc cartridge of the present invention is particularly suitable for storing a disc having a recording surface only on one side. By providing a structure in which the cartridge body covers only the signal recording surface of the disk and exposes one surface, the thickness of the cartridge can be reduced. Further, by making the shutter cover only one side of the disk cartridge, the structure can be simplified and the cost of the shutter can be reduced. In addition, since the disk holding unit or the disk holding member presses and holds the disk against the shutter or the cartridge main body, it is possible to prevent the disk from rattling within the cartridge main body and to prevent dust and the like from attaching to the signal recording surface of the disk . In addition, the design is superior by using the disc label surface exposed at the disc opening.

  Therefore, according to the present invention, there is provided a disc cartridge that is thin, highly dustproof, excellent in design, and usable in various drive devices.

(First embodiment)
FIG. 1 is a perspective view showing the entire configuration of the disk cartridge 301 according to the first embodiment of the present invention obliquely from above with the disk 100, FIG. 2 shown from obliquely below, and a disassembled state thereof. It demonstrates, referring FIG. 3 which is a perspective view of each part shown.

  The disc 100 has first and second surfaces. FIG. 1 shows the first surface, which is a surface on which a label of a normal disc is drawn. The signal recording surface 100A, which is the second surface of the disc 100, is shown as the back surface in FIG.

  As shown in FIG. 1, the disk cartridge 301 includes a cartridge lower body 11, a cartridge upper body 12, disk holding members 13 and 14, and a shutter 21.

  As shown in FIG. 3, the cartridge lower body 11 has a chucking opening 11 c opened so that a chucking member such as a spindle motor for rotating the disk 100 can enter from the outside, and the signal recording surface 100 </ b> A of the disk 100. And a head opening 11h that is open so that a head that performs at least one of signal reproduction and recording enters and can be accessed. Further, the disk drive device has a pair of positioning holes 11w that are fitted with the pair of cartridge positioning pins 210 of the disk drive device to position the disk cartridge 301 with respect to the disk drive device. The cartridge lower body 11 faces the signal recording surface 100 </ b> A of the disk 100.

  The cartridge upper body 12 has a circular disk opening 12w that allows the disk 100 to be taken in and out and opens the entire projection area of the disk 100 so that the upper surface of the disk is exposed. The cartridge upper body 12 and the cartridge lower body 11 are bonded or welded at the outer edge portion to constitute the cartridge body 10.

  The disc 100 is accommodated by the first inner side surface 11u facing the signal recording surface 100A of the disc 100 of the cartridge lower body 11 and the substantially cylindrical second inner side surface 12i constituting the disc opening 12w of the cartridge upper body 12. A disk storage unit 10d (FIG. 1) is configured. As a result, the first inner side surface 11u becomes the bottom of the disc storage portion 10d. The first inner side surface 11u of the cartridge lower body 11 is provided with a protective layer 11p that prevents the disc 100 from being damaged or dust from entering the signal recording surface 100A.

  The protective layer 11p can be appropriately selected from a nonwoven fabric for preventing scratches, a nonwoven fabric for dustproofing, a coating layer for preventing scratches, and a coating layer for dustproofing. In this embodiment, the sheet | seat which consists of a nonwoven fabric for dust prevention is stuck or ultrasonically welded as the protective layer 11p.

  In the disc storage portion 10d, a space is provided between the second inner surface 12i and the disc 100 so that the disc 100 can rotate. Further, the upper portion of the disc storage portion 10d is a disc opening portion 12w, and the disc 100 held in the disc storage portion 10d exposes one side thereof from the disc opening portion 12w to the outside.

  As shown in FIG. 3, the disc holding member 13 has a pair of elastic portions 13d and a hole 13w that penetrates diagonally, and the disc cartridge 301 has two disc holding members 13 having the same shape. Prepare. When the elastic portion 13d of the disk holding member 13 is sandwiched between the cartridge upper body 12 and the cartridge lower body 11, the tip of the disk holding member 13 is urged in the direction of the arrow 13B, thereby causing the disk 100 to move to the first inner surface. 11u. The pair of disc holding members 13 are arranged so that the hole 13w is located almost directly above the pair of positioning holes 11w.

  The disk holding member 14 has a rotating shaft 14s and an elastic portion 14d. The disk holding member 14 is fixed to the cartridge body 10 so as to be rotatable around the rotation shaft 14s, and the elastic portion 14d is sandwiched between the cartridge upper body 12 and the cartridge lower body 11, so that the tip of the disk holding member 14 is an arrow 14B. Biased in the direction. As a result, the disk 100 is pressed against the first inner surface 11u.

  The shutter 21 is provided outside the cartridge lower body 11 so as to face the signal recording surface 100 </ b> A of the disk 100. As shown in FIGS. 1 and 2, the shutter moves in the direction of the arrow 21A or 21B to open or close the chucking opening 11c and the head opening 11h with respect to the outside. The shutter spring 31 is stretched between the shutter 21 and the cartridge body 10 and biases the shutter 21 in the closing direction.

  As shown in FIG. 2, the surface of the cartridge body 10 (cartridge lower body 11) is provided with a label surface or recess 10f that can describe the contents written on the disc 100 to be stored. Also, the pair of recesses 10c provided on the left and right sides of the cartridge body 10 are for locking or positioning for pulling in when the drive device pulls in and loads the disk cartridge 301 or when the disk cartridge 301 is stored in the changer. It can be used as a dent. The concave portion 10g provided only on one side has an erroneous insertion prevention shape, and normally fits with the convex portion provided in the drive device only when the disc cartridge 301 is inserted in the correct direction. On the other hand, if the disc cartridge 301 is mistakenly inserted into the disc drive device upside down or in the opposite direction, it cannot be inserted normally due to interference with each other. Thereby, erroneous insertion can be prevented.

  Here, the holding operation of the disc 100 by the disc holding members 13 and 14 will be described in more detail with reference to FIGS. 4 and 5 are sectional views of the disk holding member 13 and the disk holding member 14 in the disk radial direction in a state where the disk 100 shown in FIGS. 1 to 3 is held.

  As shown in FIGS. 4 and 5, slopes 13 ′ and 14 ′ are provided at the tips of the disk holding members 13 and 14, which are inclined so as to protrude above the outer periphery of the disk 100 on the disk projection area. Yes. The disk holding members 13 and 14 urged in the directions of the arrows 13B and 14B by the elastic portions 13d and 14d respectively bring the inclined surfaces 13 ′ and 14 ′ into contact with the ridge 100c on the outer periphery of the disk 100 and grip the disk 100. The disc 100 is pressed in the thickness direction 100t, and the signal recording surface 100A is brought into surface contact with the sheet 11p. As a result, the disk 100 is held and fixed to the cartridge body 10. In this state, the outer peripheral portion of the signal recording surface 100A of the disc 100 is in close contact with the sheet 11p, so that dust can be prevented from adhering to the signal recording surface 100A.

  Next, the releasing operation of the disk 100 by the disk holding members 13 and 14 will be described in more detail with reference to FIGS.

  FIG. 6 is a perspective view of the disk cartridge with the cartridge body 12 and the disk 100 removed. In FIG. 6, in the shutter 21, the L-shaped portion 21s is pushed in the direction of the arrow 21A by the shutter opening mechanism of the disk drive device (not shown). As a result, the chucking opening 11c and the head opening 11h are made to the outside. Open. Further, a pair of cartridge positioning pins 210 of the disk drive device are fitted in the positioning holes 11 w of the cartridge body 10.

  7 is a cross-sectional view of the disk holding member 13 in the radial direction of the disk holding member 13 in the state of FIG. 6, and FIG. 8 is an enlarged view of a main part showing the relationship between the disk holding member 14 and the shutter 21 in the state of FIG.

  In the disk holding member 13, as shown in FIG. 7, when the cartridge positioning pin 210 of the disk drive device is inserted from the positioning hole 11w, the cartridge positioning pin 210 is fitted into the hole 13w that penetrates the disk holding member 13 diagonally. Match. For this reason, the disk holding member 13 is lifted in the direction of 13A, and the disk 100 is released from the pressure contact by the inclined surface 13 'and becomes free. At this time, the flange 13e at the tip of the disk holding member 13 is still overhanging on the outer periphery of the disk in the disk projection area. Therefore, it is possible to prevent the disk 100 from dropping from the disk cartridge 301 even when the disk 100 is configured to be perpendicular to the disk drive device.

  In the disc holding member 14, as shown in FIG. 8, when the shutter 21 is opened, the guide rib 21x provided on the shutter enters the concave portion 14w of the disc holding member 14 and pushes up the ceiling of the concave portion 14w. As a result, the disk holding member 14 is lifted in the direction 14A, and the disk 100 is released from the pressure contact by the inclined surface 14 'and becomes free. At this time, the flange 14e at the tip of the disk holding member 14 still protrudes on the outer periphery of the disk, which is on the disk projection area. For this reason, in the disk drive device configured such that the disk 100 is vertical, it is possible to prevent the disk 100 from dropping from the disk cartridge 301 even when the disk is released.

  Further, if the disk is to be forcibly removed, the disk holding member 14 and the pair of disk holding members 13 must be simultaneously released and removed. For this reason, it is possible to prevent the operator from easily removing the disk.

  In the present embodiment, as shown in FIG. 2, a brush or dust wiping material is provided at the end 21r of the shutter 21 on the side facing the disk 100, and the signal recording surface 100A of the disk 100 is accompanied by the opening operation of the shutter 21. The upper dust may be removed. Further, a lock mechanism for fixing and supporting the disk holding member to the cartridge main body 10 while holding the disk may be provided.

(Second Embodiment)
FIG. 9 is a plan view showing the overall configuration of the disc cartridge 302 according to the second embodiment of the present invention in a state where the disc 100 is held, and FIG. 10 is a plan view showing the overall configuration in the state where the disc 100 is opened. Will be described with reference to FIG. 9 and 10, the same components as those in the first embodiment are denoted by the same reference numerals, and description thereof is omitted.

  The disk cartridge 302 is different from the disk cartridge 301 of the first embodiment in the disk holding member. As shown in FIG. 9, the disk cartridge 302 includes a pair of disk holding members 15 that slide in the directions of arrows 15A and 15B. 16.

  Each disk holding member 15 has an elastic portion 15d, and is urged by the elastic portion 15d in the direction of the arrow 15B. Like the disk holding members 13 and 14 in the first embodiment, the disk 100 is driven by the inclined surface 15 ′ provided at the tip. Is held and fixed to the cartridge body 10.

  The disk holding member 16 has a rotating shaft 16c, and the disk holding member 16 is provided in the cartridge body 10 so as to be rotatable about the rotating shaft 16c. Similarly to the disk holding members 13 and 14 in the first embodiment, the disk holding member 16 also holds and fixes the disk 100 to the cartridge body 10 by the inclined surface 16 ′ provided at the tip. The disc holding member 15 has a connecting pin 15p, and a groove 16g provided in the disc holding member 16 and the connecting pin 15p are engaged and interlocked.

  When the pair of cartridge positioning pins 210 of the disk drive device are fitted in the positioning holes 11w of the cartridge body 10, the disk holding member 15 moves in the direction of the arrow 15A because the projection 15s is pushed by the positioning pins 210 as shown in FIG. The slope 15 ′ releases the disc 100. In conjunction with the movement of the disk holding member 15, the disk holding member 16 rotates in the direction of the arrow 16A, and the inclined surface 16 ′ also releases the disk 100.

(Third embodiment)
FIG. 11 is a plan view showing the overall configuration of the disc cartridge 303 according to the third embodiment of the present invention in a state where the disc 100 is held, and FIG. 12 is a plan view showing the overall configuration in the state where the disc 100 is opened. Will be described with reference to FIG. In FIG. 11 and FIG. 12, the same components as those in the first embodiment are denoted by the same reference numerals and description thereof is omitted.

  The disk cartridge 303 is different from the disk cartridge 301 of the first embodiment in the disk holding member. As shown in FIG. 11, the disk cartridge 303 holds a pair of disks biased in the directions of arrows 17B and 18B. Members 17 and 18 are provided. Each disk holding member 17, 18 is formed integrally with the cartridge body 10.

  The disk holding member 17 has an elastic portion 17d and is urged in the direction of the arrow 17B by the elastic portion 17d. Similarly to the disk holding members 13 and 14 in the first embodiment, the disk holding member 17 also holds and fixes the disk 100 to the cartridge body 10 by an inclined surface 17 ′ provided at the tip.

  The disk holding member 18 also has an elastic part 18d, and the disk holding member 18 is biased in the direction of the arrow 18B by the elastic part 18d. Further, the disk 100 is held and fixed to the cartridge main body 10 by an inclined surface 18 ′ provided at the tip.

  When the disk cartridge 303 is inserted into the disk drive device 200, a pair of disk release pins 217 provided on the disk drive device 200 press the protrusions 17 s of the disk holding member 17. As a result, the disc holding member 17 releases the disc 100 as shown in FIG. At the same time, the pair of disk release pins 218 provided in the disk drive device 200 also come into contact with the side surface 18s of the disk holding member 18, and the disk holding member 18 releases the disk 100.

(Fourth embodiment)
FIG. 13 is a plan view showing the overall configuration of the disc cartridge 304 according to the fourth embodiment of the present invention in a state where the disc 100 is held, and FIG. 14 is a plan view showing the overall configuration in the state where the disc 100 is opened. Will be described with reference to FIG. In FIG. 13 and FIG. 14, the same components as those in the first embodiment are denoted by the same reference numerals and description thereof is omitted.

  The disk cartridge 304 is different from the disk cartridge 301 of the first embodiment in the disk holding member, and includes a ring-shaped disk holding member 19.

  As shown in FIG. 13, the disk holding member 19 is formed of a ring-shaped elastic member that can be freely changed in shape, such as a rubber ring. The disk holding member 19 has an elliptical shape when no force is applied from the outside, but can be deformed to have a substantially circular shape by applying a force from the outside. When the disk holding member 19 is deformed so as to be approximately a perfect circle, its inner diameter is larger than the diameter of the disk 100.

  As shown in FIG. 13, the disk holding member 19 is in contact with the disk 100 at a plurality of elliptical locations, and holds and fixes the disk 100 to the cartridge body 10. When the disk cartridge 304 is inserted into the disk drive device 200, as shown in FIG. 14, a pair of convex portions 219 provided on the disk drive device 200 pushes the long axis side of the ring-shaped disk holding member 19 to The holding member 19 is deformed. As a result, the disc holding member 19 has a substantially circular shape, and contact between the disc 100 and the disc holding member 19 is eliminated. That is, the disk holding member 19 releases the disk 100.

  In order to release the disc 100, the force for deforming the disc holding member 19 may be applied to the disc holding member 19 by the convex portion of the disc drive device that fits into the concave portion 10g (FIG. 2) for preventing erroneous insertion. . Alternatively, it may be added to the disk holding member 19 by a convex portion of the disk drive device that fits into the concave portion 10c (FIG. 2) for drawing into the disk drive device provided on the left and right of the disk cartridge 304.

(Fifth embodiment)
The fifth embodiment of the present invention will be described below with reference to FIGS. 15 and 17 are plan views showing the structure of the remaining part of the disk cartridge 305 according to the present embodiment with the cartridge upper body removed, and FIG. 15 shows the shutter 21 closing the openings 11h and 11c. FIG. 17 shows a state where the shutter 21 opens the openings 11h and 11c. FIGS. 16 and 18 show the state of the disk holding portion 43 when the shutter 21 is closed and opened.

  In the present embodiment, the same components as those of the disk cartridge of the first embodiment are denoted by the same reference numerals.

  A characteristic feature of the disk cartridge of the present embodiment is that the disk holding / release operation of the disk holding member 43 is interlocked with the opening / closing operation of the shutter 21 by the disk holding interlocking member 44.

  As shown by arrows 44A in FIGS. 15 and 17, the disk holding interlocking member 44 is formed on the first inner side surface 11u of the cartridge lower body 11 so as to be able to rotate and slide around the chucking opening 11c of the cartridge lower body 11. Is provided. The disk holding / interlocking member 44 has a fan shape in which a part of a ring having an inner diameter of the chucking opening 11c is cut off.

  The disk holding interlocking member 44 is provided with an engaging pin 47 that protrudes toward the cartridge lower body 11 (in the direction toward the back of the paper surface in FIGS. 15 and 17). Guide grooves 11m and 21m that engage with the engaging pin 47 are provided in the cartridge lower body 11 and the shutter 21, respectively. Further, a plurality of protrusions 45 are provided on the outer periphery of the disk holding interlocking member 44 so as to protrude outward and in the cartridge upper body side (the direction toward the front of the paper surface in FIGS. 15 and 17). On the upper surface of the disk holding / interlocking member 44, a non-woven fabric or a coating material for preventing damage to the disk 100 or adhesion of dust to the signal recording surface is applied.

  A plurality of disk holding members 43 are provided at intervals in the area of the cartridge lower body 11 so that the outer periphery of the disk can be held when the disk is stored in the disk cartridge. In FIGS. 15 and 17, three disk holding members 43 are shown. However, two, four, or more disk holding members 43 may be provided. The disk holding members 43 are held by the cartridge lower body 11 so as to slide about the rotation shaft 43A.

  As shown in FIG. 16, the disk holding member 43 is positioned so that a part thereof overlaps the vicinity of the outer periphery of the disk holding interlocking member 44. The disk holding member 43 is pressed in a direction 43B toward the cartridge lower body 11 by a mechanism (not shown in FIG. 16) such as an elastic portion 14d shown in FIG. As a result, the inclined surface 43 ′ of the disk holding member 43 presses the disk 100 in the direction of 43B and holds the disk 100 so that the disk 100 contacts the disk holding interlocking member 44 while abutting the ridge of the disk 100.

  As shown in FIG. 15, when a disk cartridge holding a disk (not shown) is inserted in the direction of arrow 1A into the disk drive device 200, a shutter opening / closing lever (not shown) of the disk drive device 200 is provided. Moves the shutter 21 in the direction of 21A and opens it. When the shutter 21 starts to move in the direction of 21A, a force is also applied to the engagement pin 47 of the disk holding interlocking member 44 inserted in the guide groove 21m of the shutter 21 in the direction of the arrow 21A. As a result, the engaging pin 47 is moved along the guide groove 11m of the cartridge lower body 11, and accordingly, the disk holding interlocking member 44 starts to rotate around the chucking opening 11c as indicated by an arrow 44A. . It is preferable that the guide groove 11 m extends substantially along the moving direction of the shutter 21 so that the disk holding interlocking member 44 moves in conjunction with the shutter 21.

  When the shutter 21 is fully opened, the plurality of protrusions 45 provided on the outer periphery of the disk holding interlocking member 44 are positioned below the disk holding member 43 as shown in FIG. As shown in FIG. 18, the disk holding member 43 is pushed upward by the projection 45, and the inclined surface 43 ′ of the disk holding member 43 is separated from the outer edge of the disk 100. As a result, the force 43B that pushes the disk 100 in the direction perpendicular to the disk surface is released, and the disk 100 is released so that it can rotate. At this time, the flange 43e at the tip of the disk holding member 43 projects above the outer periphery of the disk 100 on the projection area of the disk 100. For this reason, even in a disk drive device that holds the disk 100 vertically, it is possible to prevent the disk from dropping from the cartridge when the disk is released.

  According to the disk cartridge 305 of the present embodiment, the disk can be released without inserting the disk cartridge into the disk drive device 200. For example, when the shutter 21 is opened by hand, the disk holding member 43 opens the disk 100 in conjunction with the operation of the shutter 21. Therefore, according to the intention of the user, for example, it is possible to take out the disc from the cartridge and insert another disc into the cartridge.

(Sixth embodiment)
The sixth embodiment of the present invention will be described below. 19 and 20 are plan views showing the structure of the remaining part of the disk cartridge 306 according to the present embodiment from which the cartridge upper body is removed, and FIG. 19 shows a state in which the shutter closes the head opening. FIG. 20 shows a state where the shutter opens the head opening. 19 and 20, the same components as those of the disk cartridges of the first and fifth embodiments are denoted by the same reference numerals.

  A characteristic feature of the disk cartridge of this embodiment is that the disk holding / interlocking member described in the fifth embodiment also serves as a shutter. 19 and 20, the shutter 46 is provided on the first inner surface 11u of the cartridge lower body 11 so as to be able to rotate and slide around the chucking opening 11c of the cartridge lower body 11. Yes. The shutter 46 has a fan shape in which a part of a ring having an inner diameter of the chucking opening 11c is cut off.

  The shutter 46 is provided with an engaging pin 46p that protrudes toward the cartridge lower body 11 (in the direction toward the back of the page in FIGS. 19 and 20). A guide groove 11m that engages with the engaging pin 46p is provided in the cartridge lower body 11. When the engaging pin 46p is positioned at one end of the guide groove 11m, the head opening 11h is closed by the shutter 46, and when the engaging pin 46p is at the other end of the guide groove 11m, the head opening 11h is Opened. The guide groove 11m is provided along a part of an arc concentric with the chuck opening 11c. It is preferable that the guide groove 11m extends substantially along the insertion direction 1A of the disk cartridge so that the shutter 46 is opened along with the insertion operation into the disk drive device.

  On the outer periphery of the shutter 46, a plurality of protrusions 46c protruding in the outer peripheral direction and in the cartridge upper body 12 side (the direction toward the front of the paper surface in FIGS. 19 and 20) are provided. A non-woven fabric or a coating material is applied to the upper surface of the shutter 46 to prevent damage to the disk 100 or to prevent dust from adhering to the signal recording surface.

  In the region of the cartridge lower body 11, a plurality of disk holding members 43 having the same structure as the disk holding member of the fifth embodiment are provided at intervals. The protrusion 46c provided on the disk holding member 43 and the shutter 46 holds or releases the disk in conjunction with the operation of the shutter 46 as described in the fifth embodiment.

  When the disk cartridge of the present embodiment is inserted into the disk drive device 200 as indicated by the arrow 1A in FIG. 19, the engagement pin 46p of the shutter 46 contacts the contact member 201 provided in the disk drive device 200. . When the disk cartridge is further inserted into the disk drive device 200, the engagement pin 46p starts to move along the guide groove 11m by the contact member 201. Along with this, the shutter 46 starts to rotate around the chucking opening 11c of the cartridge lower body 11 as indicated by an arrow 46B, and the head opening 11h opens with the rotation.

  As shown in FIG. 20, when the disk cartridge is completely inserted into the disk drive device 200, the engaging pin 46p reaches the other end of the guide groove 11m, and the head opening 11h is completely opened. At this time, as described in the fifth embodiment, the protrusion 46c is positioned below the disk holding member 43, and the disk holding part is pushed up to the cartridge upper body side (the front side in FIG. 20) by the protrusion 46c. . As a result, the disk 100 held by the disk holding member 43 is released and can freely rotate.

  According to the disk cartridge of the present embodiment, the disk holding interlocking member is unnecessary, so that the thickness can be reduced as compared with the disk cartridge of the fifth embodiment. Further, by moving the engaging pin 46p by hand along the guide groove 11m, the shutter 46 can be opened and the disk holding member can be released to take out the disk.

  In this embodiment, the shutter 46 rotates clockwise as viewed from the cartridge upper body side. However, the shutter 46 may be rotated counterclockwise by changing the position of the guide groove 11m.

(Seventh embodiment)
The seventh embodiment of the present invention will be described below. 21 and 22 are plan views showing the structure of the remaining portion of the disk cartridge 307 according to the present embodiment with the cartridge upper body removed, and FIG. 21 shows a state where the shutter closes the head opening. FIG. 22 shows a state in which the shutter opens the head opening. 21 and 22, the same reference numerals are given to the same constituent elements as those of the disk cartridges of the third embodiment and the sixth embodiment.

  The disc cartridge of the present embodiment is different from the disc cartridge of the sixth embodiment in the structure of the disc holding member. Specifically, as shown in FIGS. 21 and 22, the disk cartridge of the present embodiment includes a plurality of disk holding members 17. The disk holding member 17 has an elastic part 17d, similar to the disk holding member described in the third embodiment, and when the shutter 46 is closed, the disk 100 is made to move to the disk by the elastic force of the elastic part 17d. The disc is held so as to be pressed in the center direction 17R. In this embodiment, the disk holding member 17 is formed integrally with the cartridge lower body 11, but may be formed separately from the cartridge lower body 11.

  The cross-sectional shape of the disk holding member 17 in the disk radial direction has a slope inclined so as to protrude above the outer periphery of the disk, which is the disk projection area, like the disk holding member 43 shown in FIG. For this reason, the disc is pressed against the shutter 46 by the disc holding member 17 holding the disc so that the ridge of the disc contacts the inclined surface.

  The shutter 46 includes a plurality of protrusions 46c on the outer periphery thereof. In the present embodiment, the protrusion 46 c protrudes outward, and the protrusion 46 c is positioned at a position where the protrusion 46 c contacts the elastic portion 17 d of the disk holding member 17 when the shutter 46 is in the open state. Provided in the section.

  As shown in FIG. 22, when the shutter 46 is opened, the protrusion 46c presses the elastic portion 17d against the elastic force in the direction 17s toward the outside of the disk 100. As a result, the disk 100 is released. However, a flange 17e is provided at the tip of the disk holding member 17, and even when the disk 100 is released, the flange 17e protrudes to the projection area of the disk. For this reason, even if the disc cartridge is inserted into the disc drive device 200 so that the disc 100 is held vertically, the disc 100 does not fall out of the disc cartridge.

  According to the disk cartridge of the present embodiment, in addition to the features described in the sixth embodiment, the disk holding member 17 can be formed integrally with the cartridge lower body 11. In this case, the structure of the disk cartridge can be simplified, and the manufacturing cost can be reduced.

(Eighth embodiment)
Hereinafter, a disk cartridge 308 according to an eighth embodiment of the present invention will be described with reference to the drawings.

  First, the general structure of the disk cartridge 308 will be described with reference to FIGS. As in the first embodiment, the disk 100 shown in FIGS. 23 and 24 has first and second surfaces. In FIG. 23, the first surface is a normal disk label or the like. The surface being shown is shown. The signal recording surface 100A, which is the second surface of the disc 100, is shown as the back surface in FIG.

  As shown in FIGS. 23 and 24, the disk cartridge 308 includes a cartridge lower body 11, a cartridge upper body 12, a pair of shutters 21 and 22, and a drop-off prevention member 23.

  As shown in FIG. 24, the cartridge lower body 11 has a chucking opening 11c that is opened so that a chucking member such as a spindle motor for rotating the disk 100 can enter from the outside, and a signal recording surface 100A of the disk 100. And a head opening 11h that is open so that a head that performs at least one of signal reproduction and recording enters and can be accessed. The cartridge lower body 11 faces the signal recording surface 100 </ b> A of the disk 100. The head opening 11 h reaches the side surface of the cartridge lower body 11.

  The cartridge upper body 12 has a circular disk opening 12w that allows the disk 100 to be taken in and out and opens the entire projection area of the disk 100 so that the upper surface of the disk is exposed. The cartridge upper body 12 and the cartridge lower body 11 are bonded or welded at the outer edge portion to constitute the cartridge body 10.

  The disc 100 is accommodated by the first inner side surface 11u facing the signal recording surface 100A of the disc 100 of the cartridge lower body 11 and the substantially cylindrical second inner side surface 12i constituting the disc opening 12w of the cartridge upper body 12. A disk storage unit 10d is configured. As a result, the first inner side surface 11u becomes the bottom of the disc storage portion 10d.

  In the disc storage portion 10d, a space is provided between the second inner surface 12i and the disc 100 so that the disc 100 can rotate. Further, the upper portion of the disc storage portion 10d is a disc opening portion 12w, and the disc 100 held in the disc storage portion 10d exposes one side thereof from the disc opening portion 12w to the outside.

  The drop-off prevention member 23 is detachably provided on the cartridge upper body 12 so that a part of the drop-off prevention member 23 projects into the disk opening 12w. As shown in FIGS. 23 and 24, two dropout prevention members 23 are provided in this embodiment. On the other hand, the cartridge upper body 12 is formed integrally with the cartridge upper body 12, and is provided with a drop-off preventing portion 12s protruding from the disk opening 12w. The two drop-off prevention members 23 and the drop-off prevention portion 12s are arranged at approximately equal intervals on the circumference of the disc opening 12w, and prevent the disc 100 from dropping from the disc opening 12w. In particular, when the disk cartridge is used by being inserted vertically into the drive device, the effect of preventing the drop cartridge is exhibited.

  The shutters 21 and 22 are provided between the signal recording surface 100A of the disc 100 and the inner side surface 11u of the disc storage portion 10d. The shutters 21 and 22 have rotation holes 21u and 22u, respectively, and are a pair of rotations provided in an area other than the disk storage portion 10d of the cartridge body 10 and on the side opposite to the head opening 11h. The rotation holes 21u and 22u are fitted to the shaft 11s so as to be rotatable. Therefore, the shutters 21 and 22 move around the rotation shaft 11s so as to open or close the chucking opening 11c and the head opening 11h with respect to the outside.

  A cam 21c and a follower 22c are provided near the rotation holes 21u and 22u of the shutters 21 and 22, respectively. The cam 21c and the follower 22c have shapes that mesh with each other, and constitute an interlocking mechanism 20c that opens and closes the shutters 21 and 22 while interlocking with each other.

  Protective layers 21p and 22p are provided on the surfaces of the shutters 21 and 22 that face the disc signal recording surface 100A to prevent the disc 100 from being damaged or dust from entering the signal recording surface 100A.

  The protective layers 21p and 22p can be appropriately selected from a scratch-proof nonwoven fabric, a dust-proof nonwoven fabric, a scratch-proof coating layer, and a dust-proof coating layer. In this embodiment, the sheet | seat which consists of a nonwoven fabric for dust prevention is affixed or ultrasonically welded as the protective layers 21p and 22p.

  The shutters 21 and 22 are urged in a direction in which the shutters 21 and 22 are closed by shutter springs 31 and 32 provided in regions other than the disk storage portion 10d, respectively. An elastic member other than the spring may be used to bias the shutters 21 and 22 in the closing direction.

  As shown in FIG. 24, the disc cartridge 308 includes disc holding portions 21a, 21b, 22a, and 22b at the ends of the shutters 21 and 22. The disk holding portions 21a, 21b, 22a, and 22b have reverse tapered slopes at the ends of the shutters 21 and 22 so as to hold the outer periphery of the disk 100 when the shutters 21 and 22 are closed. Yes. The structure and operation of the disk holding portions 21a, 21b, 22a, 22b will be described in detail below.

  As shown in FIG. 23, on the upper surface of the cartridge main body 10 (cartridge upper body 12), to the label surface 10f on which the contents written on the disc 100 to be stored can be described, and to the drive device of the disc cartridge 308. An arrow-shaped marking or recess 10a indicating the insertion direction (arrow 1A) is provided. Further, the recesses 10c provided on the pair of side surfaces parallel to the insertion direction 1A of the cartridge main body 10 are used for pulling in when the drive device loads the disk cartridge 308 or when the disk cartridge 308 is stored in the changer. Can be used as a recess for positioning or positioning.

  FIG. 25 is a perspective view showing a state where the shutters 21 and 22 block the chucking opening 11c and the head opening 11h from the outside when the cartridge upper body 12 and the disk 100 are not present. In FIG. 25, disk holding portions 21a, 21b, 22a, 22b provided on the shutters 21, 22 are positioned so as to grip the outer periphery of the disk 100 (not shown).

  FIG. 26 is a perspective view showing a state in which the shutters 21 and 22 open the chucking opening 11c and the head opening 11h to the outside when the cartridge upper body 12 and the disk 100 are not present. The shutters 21 and 22 rotate about the rotation holes 21u and 22u, thereby opening the chucking opening 11c and the head opening 11h to the outside. As the shutters 21 and 22 move, the disk holding portions 21a, 21b, 22a, and 22b also rotate about the rotation holes 21u and 22u and are separated from the outer periphery of the disk 100 (not shown).

  FIG. 27 is a perspective view showing a state in which the shutters 21 and 22 block the chucking opening 11c and the head opening 11h from the outside when the disk 100 is not present. As shown in FIG. 27, the disk holding portions 21a, 21b, 22a, and 22b are in a state of protruding into the disk storage portion 10d and hold the disk 100 (not shown). On the other hand, FIG. 28 is a perspective view showing a state where the shutters 21 and 22 open the chucking opening 11c and the head opening 11h to the outside when the disk 100 is not present. As shown in FIG. 28, when the shutters 21 and 22 are in the open state, the disk holding portions 21a, 21b, 22a, and 22b are stored in an area other than the disk holding portion 10d of the cartridge body.

  Next, the configuration and operation of the shutters 21 and 22 will be described in more detail with reference to FIGS. FIG. 29 is a sectional view passing through the center of the disk 100. As shown in FIG. 29, the second inner side surface 12i of the disk storage portion 10d in the cartridge main body 10 is provided with a notch 10w so as not to interfere with the shutter 22 (21) that performs the opening / closing operation, and further, when in the opened state. A shutter housing portion 10 s for housing a part of the shutter 22 (21) is provided in the cartridge body 10. Also, among the edges of the shutters 21 and 22 that are abutted when the shutter is closed, at least the edges 21f and 22f that are abutted on the head opening 11h and the chucking opening 11c are formed on the disk 100 as shown in FIG. It is superimposed in the thickness direction.

  On the other hand, as shown in FIG. 30, the disk holding portions 21a, 21b, 22a, and 22b are inclined surfaces 21a ′ (21b ′, 22a ′) that are on the disk projection area and are inclined so as to protrude on the outer periphery of the disk 100. , 22b ′). That is, the inclined surface 21 a ′ has a reverse taper shape and is inclined toward the disk 100. When the shutters 21 and 22 close the chucking opening 11c and the head opening 11h, the disk 100 is gripped and pressed in the thickness direction 100t by bringing the inclined surface 21a 'into contact with the ridge 100c of the disk 100. Then, the signal recording surface 100A is brought into surface contact with the sheets 21p and 22p of the shutters 21 and 22, and the disk 100 is held and fixed to the cartridge body 10. In this state, since the signal recording surface 100A of the disc 100 is in close contact with the sheets 21p and 22p, it is possible to prevent dust from adhering to the signal recording surface 100A.

  Further, dirt such as dust and fingerprints attached to the signal recording surface 100A of the disc 100 by forcibly rotating one side of the disc 100 exposed from the outside or forcibly opening and closing the shutters 21 and 22 Can be wiped out.

  As shown in FIG. 31, the shutter 21 is integrally formed with a shutter opening / closing operation portion 21t and an elastic portion 21v for opening and closing the shutter from the outside, and a lock projection portion 21k formed therethrough. In a state where the shutter 21 closes the chucking opening 11c and the head opening 11h, as shown in FIG. 31, the lock protrusion 21k biased by the elastic portion 21v is a lock hole 10k formed in the cartridge body 10. And fixedly supported on the cartridge body 10 so as not to rotate the shutter 21. When the shutter 21 is fixed, the shutter 22 connected by the interlocking mechanism 20c is also fixed.

  Therefore, the shutters 21 and 22 are rotated only by pushing the opening / closing operation part 21t in the direction of the arrow 20B at the same time while pushing the locking projection part 21k in the direction of the arrow 20A by a projection or the like from the outside to disengage the lock hole 10k. By moving, the chucking opening 11c and the head opening 11h are opened to the outside, and at the same time, the holding of the disk 100 by the disk holding parts 21a, 21b, 22a, and 22b can be released. In this way, easy disk removal by the operator can be prevented.

  The structure and operation of the dropout prevention member 23 will be described in more detail with reference to FIGS. FIG. 32 is a perspective view of the drop-off preventing member 23 that is detachably provided upside down as viewed obliquely. The drop-off prevention member 23 is detachably attached by fitting the protrusions 23a, 23b, and 23c with the recesses 12a, 12b, and 12c provided near the disk opening 12w of the cartridge upper body 12 shown in FIG. .

  Further, a mechanism for preventing the disc cartridge 308 from being erroneously inserted into the drive device will be described in more detail with reference to FIG. FIG. 33 is a front view of the disk cartridge 308 in FIG. 23 as viewed from the direction of insertion into the drive device (arrow 1B). As shown in FIG. 33, the cartridge body 10 has a recess 10g formed on one side thereof at a position shifted from the center of thickness, and is asymmetric with respect to the insertion direction 1A (FIG. 23) into the drive device. ing.

  Due to such a structure, the disk cartridge 308 can be correctly inserted into the drive device only when the convex portion provided in the drive device fits into the concave portion 10g, and the drive device operates normally.

  On the other hand, when the disk cartridge 308 is mistakenly inserted upside down into the drive device, the convex portion provided in the drive device interferes with the side surface without the concave portion 10g, and the cartridge 308 is inserted into the drive device. It is not possible. Further, even if it is mistakenly inserted in the opposite direction in the front-rear direction and the up-down direction, the convex portion provided in the drive device cannot interfere with the portion of the side surface provided with the concave portion 10g and cannot be inserted. Thereby, erroneous insertion can be prevented.

  Various modifications can be made to the disk cartridge 308 described in the present embodiment.

  For example, when the shutters 21 and 22 are closed, the cartridge main body 10 is further reduced in thickness so that the drop-off prevention member 23 does not protrude from the upper surface 12f (FIG. 24) of the cartridge upper body 12. When the shutters 21 and 22 are in the open state, when the disk holding portions 21a and 22a pass below the drop-off prevention member 23, for example, in conjunction with the opening operation of the shutters 21 and 22, the drop-off prevention member 23 protrudes. The drop-off prevention member 23 is protruded from the upper surface 12f of the cartridge upper body 12 by pressing the portion 23a from below. With such a structure, it is possible to further reduce the thickness of the disk cartridge while ensuring a sufficient space when the disk 100 rotates in the disk storage portion 10d.

  Further, the drop-off prevention member 23 may be formed integrally with the cartridge body 10 and be foldable, and the drop-off prevention member 23 may be provided so as to be removable.

  The shutter springs 31 and 32 may be biased in the direction in which the shutters 21 and 22 open. If the operation of the shutters by the interlocking mechanism is reliable, only one of the shutter springs 31 and 32 may be provided.

  The lock protrusion 21k is formed on the shutter 21, but a lock protrusion and a protrusion are provided at the tip of the lock lever formed on the cartridge body 10 through the elastic portion, and the protrusion and the recess provided on the shutter are provided. The fitting may be removed by pushing the lock protrusion from a lock hole provided in the cartridge body, and the shutter may be opened in a freely rotatable manner. In this case, the lock lever may be formed of a resin spring formed integrally with the cartridge body 10 together with the shutter spring (elastic member).

(Ninth embodiment)
Hereinafter, a disk cartridge 309 according to a ninth embodiment of the present invention will be described with reference to the drawings.

  As shown in FIGS. 34 and 35, the disk cartridge 309 includes a cartridge lower body 41, a cartridge upper body 42, dropout prevention members 42a, 42b, 42c, and 42d, and a pair of shutters 51 and 52.

  As shown in FIG. 35, the cartridge lower body 41 has a chucking opening 41c opened so that a chucking member such as a spindle motor for rotating the disk 100 can enter from the outside, and the signal recording surface 100A of the disk 100. And a head opening 41h that is open so that a head that performs at least one of signal reproduction and recording enters and can be accessed. The cartridge lower body 41 faces the signal recording surface 100 </ b> A of the disk 100. Further, the head opening 41 h reaches the side surface of the cartridge lower body 41.

  The cartridge upper body 42 has a circular disk opening 42w that allows the disk 100 to be taken in and out and opens the entire projection area of the disk 100 so that the upper surface of the disk is exposed. The cartridge upper body 42 and the cartridge lower body 41 are bonded or welded at the outer edge portion to constitute a cartridge main body 40.

  The disc 100 is accommodated by the first inner side surface 41u of the cartridge lower body 41 facing the signal recording surface 100A of the disc 100 and the substantially cylindrical second inner side surface 42i constituting the disc opening 42w of the cartridge upper body 42. A disc storage portion 40d is configured. As a result, the first inner surface 41u becomes the bottom of the disc storage portion 40d.

  In the disc storage portion 40d, a space is provided between the second inner surface 42i and the disc 100 so that the disc 100 can rotate. The upper part of the disk storage part 40d is a disk opening part 42w, and the disk 100 held in the disk storage part 40d exposes one side thereof from the disk opening part 42w.

  The drop-off prevention members 42a, 42b, 42c, and 42d are divided by slits from the cartridge upper body 42 so as to partially protrude from the disk opening 42w, and are provided integrally with the cartridge upper body 42. The drop prevention members 42a, 42b, 42c, and 42d prevent the disc 100 from dropping from the disc opening 42w. In particular, when the disk cartridge is used by being inserted vertically into the drive device, the effect of preventing the drop cartridge is exhibited. The drop-off prevention members 42a, 42b, 42c, and 42d may be formed integrally with the cartridge upper body 42 through elastic members.

  The shutters 51 and 52 are provided between the signal recording surface 100A of the disc 100 and the inner side surface 41u of the disc storage portion 40d. The shutters 51 and 52 have rotation holes 51u and 52u, respectively, and are a pair of rotations provided in an area other than the disk storage portion 40d of the cartridge body 40 and on the side opposite to the head opening 41h. The rotation holes 51u and 52u are fitted to the shaft 41s so as to be rotatable. Therefore, the shutters 51 and 52 move around the rotation shaft 41s so as to open or close the chucking opening 41c and the head opening 41h with respect to the outside.

  A cam 51c and a follower 52c are provided in the vicinity of the rotation holes 51u and 52u of the shutters 51 and 52, respectively. The cam 51c and the follower 52c have shapes that mesh with each other, and constitute an interlocking mechanism 50c that opens and closes the shutters 51 and 52 while interlocking with each other.

  Protective layers 51p and 52p are provided on the surfaces of the shutters 51 and 52 facing the disc signal recording surface 100A to prevent the disc 100 from being damaged or dust from entering the signal recording surface 100A.

  The protective layers 51p and 52p can be appropriately selected from a scratch-proof nonwoven fabric, a dust-proof nonwoven fabric, a scratch-proof coating layer, and a dust-proof coating layer. In this embodiment, the sheet | seat which consists of a nonwoven fabric for dust prevention is affixed or ultrasonically welded as the protective layers 51p and 52p.

  The shutters 51 and 52 are urged in the direction in which the shutters 51 and 52 are closed by shutter springs 61 and 62 provided in regions other than the disc storage portion 40d, respectively. The shutter springs 61 and 62 may be biased in the direction in which the shutters 51 and 52 open. Further, only one of the shutter springs 61 and 62 may be provided if the operation of the shutters by the interlocking mechanism is reliable.

  As shown in FIG. 35, similarly to the eighth embodiment, disk holding portions 51a, 51b, 52a, and 52b are provided at the ends of the shutters 51 and 52, respectively. Further, as will be described in detail below, convex portions 51e and 52e are provided in regions corresponding to the center hole of the disk 100 of the shutters 51 and 52, respectively.

  As shown in FIG. 34, on the upper surface of the cartridge main body 40 (cartridge upper body 42), there is provided an arrow-shaped stamp or recess 40a indicating the insertion direction (arrow 1A) of the disk cartridge 309 into the drive device. In addition, a pair of side surfaces parallel to the insertion direction 1A of the cartridge body 40 is provided with a recess 40c. The recess 40c can be used as a pull-in lock or positioning recess when the drive device loads the disk cartridge 309 or when the cartridge 309 is stored in the changer. Providing the recess 40c only on one side of the cartridge 309 also serves as a mechanism for preventing erroneous insertion on the front and back when the disk cartridge 309 is inserted into or attached to the drive device. On the upper surface of the cartridge main body 40, a grip portion 40e for the operator to hold the cartridge 309 is provided. The grip portion 40e has an uneven shape for preventing slipping.

  FIG. 36 is a perspective view showing a state where the shutters 51 and 52 block the chucking opening 41c and the head opening 41h from the outside when the disk 100 is not present. FIG. 37 is a perspective view showing a state where the shutters 51 and 52 open the chucking opening 41c and the head opening 41h to the outside when the disk 100 is not present.

  Hereinafter, the structure and operation of the shutters 51 and 52 will be described in more detail. As shown in FIGS. 34 and 35, disk holding portions 51a, 51b, 52a, and 52b provided in the shutters 51 and 52 are on the disk projection area and are on the outer periphery of the disk 100, as in the eighth embodiment. It has a shape that has an inclined surface that protrudes upward. That is, the inclined surface has an inversely tapered shape and is inclined toward the disk 100. As a result, the same effect as in the eighth embodiment is exhibited.

  Further, the shutter 52 is provided with an opening / closing operation part 52t for opening and closing the shutter from the outside, and the shutter 51 is integrally formed with an elastic part 51v and a lock projection part 51k formed therethrough. As a result, when the shutters 51 and 52 close the chucking opening 41c and the head opening 41h, the lock protrusion 51k biased by the elastic part 51v fits into the lock hole 40k formed in the cartridge body 40. The shutter 51 is fixedly supported on the cartridge body 40 so as not to rotate. When the shutter 51 is fixed, the shutter 52 connected by the interlocking mechanism 50c is also fixed.

  Therefore, as shown in FIG. 36, only by pushing the opening / closing operation part 52t in the direction of the arrow 50B while pushing the locking projection 51k in the direction of the arrow 50A by a projection or the like from the outside to disengage the lock hole 40k. By rotating the shutters 51 and 52, the chucking opening 41c and the head opening 41h are opened to the outside, and at the same time, the holding of the disk 100 by the disk holding parts 51a, 51b, 52a, 52b can be released. In this way, easy disk removal by the operator can be prevented.

  Further, unlike the eighth embodiment, the lock projection 51k and the opening / closing operation part 52t provided on the shutters 51 and 52 are provided on the separate shutters 51 and 52, respectively. Such a structure is particularly effective for a disk cartridge for a small-diameter disk. This is because, in a disk cartridge for a small-diameter disk, since the entire cartridge and the shutter are small, it is difficult to design a lock projection and an opening / closing operation section on one shutter. Even if the lock protrusion and the opening / closing operation part can be formed on one shutter, the distance between the shutter opening / closing mechanism provided on the drive device side and the unlocking mechanism is very narrow, or both mechanisms are provided in a small space. This is because the design of the drive device becomes difficult due to necessity.

  Although the lock protrusion 51k is formed on the shutter 51, a lock protrusion and a protrusion are provided on the tip of the lock lever formed on the cartridge body 40 via an elastic portion, and the protrusion and the recess provided on the shutter. May be removed by pushing a lock projection from a lock hole provided in the cartridge body, and the shutter may be opened freely. In this case, the lock lever may be formed of a resin spring formed integrally with the cartridge body 40 together with the shutter spring (elastic member).

  Next, the function of the convex portions 51e and 52e provided on the shutters 51 and 52 will be described. FIG. 38 is a cross-sectional view of the vicinity of the center of the disk passing through the center of the disk 100. As shown in FIG. 38, when the shutters 51 and 52 are closed, the convex portions 51e and 52e protrude into the center hole 100h, and the disk 100 is in surface contact with the shutters 51 and 52.

  As shown in FIG. 39, when the shutters 51 and 52 shift to the open state, the convex portions 51e and 52e sink into the lower surface of the disk 100 from the center hole 100h, lift the disk 100, and the shutters 51 and 52 and the disk. The surface contact with 100 is released. Thereby, it is possible to prevent the shutters 51 and 52 from scratching the signal recording surface 100A when the shutters 51 and 52 are opened and closed. Since the movement area of the protrusions 51e and 52e due to the opening and closing operation of the shutters 51 and 52 is on the inner peripheral side of the signal recording area of the signal recording surface 100A, the protrusions 51e and 52e do not contact the signal recording area. The recording area is not damaged.

  Next, the structure and operation of the drop-off prevention member will be described in more detail with reference to FIGS. FIG. 40 is a cross-sectional view of the vicinity of the outer periphery of the disk passing through the center of the disk 100, and convex portions 42c ′ (42a ′, 42b ′, 42d ′) are formed on the back surface of the dropout prevention member 42c (42a, 42b, 42d). Yes. As shown in FIG. 40, in a state where the shutters 51 and 52 are closed, the drop-off prevention member 42 c is approximately parallel to the disk 100 and is within the thickness of the cartridge 309. The appearance of the disk cartridge 309 in this state is shown in FIG.

  In the state where the shutters 51 and 52 are opened, as shown in FIG. 41, the inclined portions 52f, 51f, 51d and 52d formed on the shutters 51 and 52 are respectively convex portions 42a ′, 42b ′, 42c ′ and 42d. , And the drop prevention members 42 a, 42 b, 42 c and 42 d are pushed up above the disk 100. The appearance of the disk cartridge 309 in this state is shown in FIG. With this structure, it is possible to prevent the disc 100 from dropping from the disc cartridge 309 especially after the disc cartridge 309 is inserted vertically into the disc drive apparatus until the disc 100 is chucked. On the other hand, when the disc 100 is chucked, the space in which the disc 100 can operate can be expanded. In addition, this structure can make the cartridge body thinner.

  In the state where the shutters 51 and 52 are opened, the convex portions 42a ′ (42b ′, 42c ′ and 42d ′) are formed on the inclined portions 51c (52f, 51f and 52d) in order to temporarily hold the shutter open state. ) May be provided with a convex portion or a concave portion.

(Tenth embodiment)
Hereinafter, a disk cartridge 310 according to a tenth embodiment of the present invention will be described with reference to the drawings. The main feature of the disk cartridge 310 of this embodiment is that a drop-off prevention member is provided on the shutter.

  As shown in FIGS. 42 and 43, the disk cartridge 310 includes a cartridge lower body 71, a cartridge upper body 72, drop-off preventing members 81d, 81f, and 82d, and a pair of shutters 81 and 82.

  As shown in FIG. 43, the cartridge lower body 71 has a chucking opening 71c opened so that a chucking member such as a spindle motor for rotating the disk 100 can enter from the outside, and the signal recording surface 100A of the disk 100. And a head opening 71h that is open so that a head that performs at least one of signal reproduction and recording enters and can be accessed. The cartridge lower body 71 faces the signal recording surface 100 </ b> A of the disk 100. Further, the head opening 71 h reaches the side surface of the cartridge lower body 71.

  The cartridge upper body 72 has a circular disk opening 72w that allows the disk 100 to be taken in and out and opens the entire projection area of the disk 100 so that the upper surface of the disk is exposed. The cartridge upper body 72 and the cartridge lower body 71 are bonded or welded at the outer edge portion to constitute the cartridge main body 70.

  The disc 100 is housed by the first inner side surface 71u of the cartridge lower body 71 facing the signal recording surface 100A of the disc 100 and the substantially cylindrical second inner side surface 72i constituting the disc opening 72w of the cartridge upper body 72. A disc storage unit 70d is configured. As a result, the first inner side surface 71u becomes the bottom of the disc storage portion 70d.

  In the disc storage portion 70d, a space is provided between the second inner side surface 72i and the disc 100 so that the disc 100 can rotate. The upper part of the disk storage part 70d is a disk opening 72w, and the disk 100 held in the disk storage part 70d exposes one side thereof from the disk opening 72w.

  The shutters 81 and 82 are provided between the signal recording surface 100A of the disc 100 and the inner side surface 71u of the disc storage portion 70d. The shutters 81 and 82 have rotation holes 81u and 82u, respectively, and are a pair of rotations provided in an area other than the disk storage portion 70d of the cartridge body 70 and on the side opposite to the head opening 71h. The rotation holes 81u and 82u are fitted to the shaft 71s so as to be freely rotatable. For this reason, the shutters 81 and 82 move around the rotation shaft 71s so as to open or close the chucking opening 71c and the head opening 71h with respect to the outside.

  A cam 81c and a follower 82c are provided in the vicinity of the rotation holes 81u and 82u of the shutters 81 and 82, respectively. The cam 81c and the follower 82c have shapes that mesh with each other, and constitute an interlocking mechanism 80c that opens and closes the shutters 81 and 82 while interlocking with each other.

  Protective layers 81p and 82p are provided on the surfaces of the shutters 81 and 82 facing the disc signal recording surface 100A to prevent the disc 100 from being damaged or dust from entering the signal recording surface 100A.

  The protective layers 81p and 82p can be appropriately selected from a scratch-proof nonwoven fabric, a dust-proof nonwoven fabric, a scratch-proof coating layer, and a dust-proof coating layer. In this embodiment, the sheet | seat which consists of a nonwoven fabric for dust prevention is affixed or ultrasonically welded as the protective layers 81p and 82p.

  The shutters 81 and 82 are urged in the direction in which the shutters 81 and 82 are closed by shutter springs 91 and 92 provided in regions other than the disk storage portion 70d, respectively. The shutter springs 91 and 92 may be biased in the direction in which the shutters 81 and 82 are opened. If the operation of the shutters by the interlocking mechanism is reliable, only one of the shutter springs 91 and 92 may be provided.

  As shown in FIG. 43, similarly to the eighth embodiment, disk holding portions 81a, 81b, 82a, and 82b are provided at the ends of the shutters 81 and 82, respectively. Similarly, the protrusions 81e and 82e are provided on the shutters 81 and 82, respectively.

  Further, as will be described in detail below, drop-off prevention members 81f, 81d, and 82d are integrally formed with the shutters 81 and 82 in the vicinity of the disk holding portions 81a, 81b, and 82b of the shutters 81 and 82, respectively. The drop-off prevention members 81f, 81d, and 82d may be formed integrally with the shutters 81 and 82 through an elastic member.

  As shown in FIG. 42, on the upper surface of the cartridge main body 70 (cartridge upper body 72), there is provided an arrow-shaped stamp or recess 70a indicating the insertion direction (arrow 1A) of the disk cartridge 310 into the drive device. Further, a pair of side surfaces parallel to the insertion direction 1A of the cartridge body 70 are provided with recesses 70c. The recess 70c can be used as a recess for locking or positioning when the drive device loads the disk cartridge 310 or when the disk cartridge 310 is stored in the changer. Providing the recess 70c only on one side of the cartridge 310 also serves as a mechanism for preventing erroneous insertion on the front and back when the disk cartridge 310 is inserted into or attached to the drive device. On the upper surface of the cartridge main body 70, a grip portion 70e for an operator to hold the cartridge 310 is provided. The grip portion 70e has an uneven shape for preventing slipping.

  FIG. 44 is a perspective view showing a state where the shutters 81 and 82 block the chucking opening 71c and the head opening 71h from the outside when the disk 100 is not present. FIG. 45 is a perspective view showing a state where the shutters 81 and 82 open the chucking opening 71c and the head opening 71h to the outside when the disk 100 is not present.

  Hereinafter, the structure and operation of the shutters 81 and 82 will be described in more detail. As shown in FIGS. 42 and 43, the disk holding portions 81a, 81b, 82a, and 82b provided in the shutters 81 and 82 are on the disk projection area and the outer periphery of the disk 100, as in the eighth embodiment. It has a shape that has an inclined surface that protrudes upward. That is, the inclined surface has an inversely tapered shape and is inclined toward the disk 100. As a result, the same effect as in the eighth embodiment is exhibited.

  Further, the shutter 82 is integrally formed with an opening / closing operation part 82t and an elastic part 82v for opening and closing the shutter from the outside, and a lock projection part 82k formed therethrough. Thus, in a state where the shutters 81 and 82 close the chucking opening 71c and the head opening 71h, the lock protrusions 82k biased by the elastic part 82v are formed in the lock holes 70k (see FIG. 44) and fixedly supported on the cartridge main body 70 so that the shutter 82 does not rotate. When the shutter 82 is fixed, the shutter 81 connected by the interlocking mechanism 80c is also fixed.

  Therefore, as shown in FIG. 44, only by pushing the opening / closing operation portion 82t in the direction of the arrow 70B while pushing the lock projection portion 82k in the direction of the arrow 70A by the projection or the like from the outside to disengage the lock hole 70k. By rotating the shutters 81 and 82, the chucking opening 71c and the head opening 71h are opened to the outside, and at the same time, the holding of the disk 100 by the disk holding parts 81a, 81b, 82a, 82b can be released. In this way, easy disk removal by the operator can be prevented.

  Although the lock protrusion 82k is formed on the shutter 82, a lock protrusion and a protrusion are provided at the tip of the lock lever formed on the cartridge body 70 via the elastic portion, and the protrusion and the recess provided on the shutter. May be removed by pushing a lock projection from a lock hole provided in the cartridge body, and the shutter may be opened freely. In this case, the lock lever may be formed of a resin spring formed integrally with the cartridge body 70 together with the shutter spring (elastic member).

  Next, the structure and operation of the drop-off prevention members 81f, 81d, and 82d will be described in more detail. In the state where the shutters 81 and 82 are closed, the drop-off prevention members 81f, 81d and 82d are approximately parallel to the disk 100 as shown in FIGS. 46 and 48, and the drop-off prevention members 81f and 81d are arranged from the upper surface of the disk cartridge 310. , 82d does not protrude. The appearance of the disk cartridge 310 in this state is shown in FIG.

  47 and 49, when the shutters 81 and 82 shift to the open state, the drop-off prevention members 81f, 81d, and 82d are provided on the slit 70s provided on the inner wall portion of the cartridge 70 and the inner upper wall, respectively. Guided by the inclined portion 72 s and pushed upward of the disk 100. Further, the cartridge upper body 72 is provided with notches 72a, 72b, 72c so that the cartridge upper body 72 does not interfere with the cartridge upper body 72 when the drop prevention members 81f, 81d, 82d are pushed up. The appearance of the disk cartridge 310 in this state is shown in FIG.

  Further, in a state where the shutters 81 and 82 are closed, the drop-off prevention members 81f, 81d and 82d are located in the projection area of the disk 100 and above the disk 100, so that the disk 100 is pressed against the shutters 81 and 82 in the thickness direction. It is possible to eliminate the disk holding portions 81a, 81b, 82a, and 82b of the shutters 81 and 82.

  With this structure, it is possible to prevent the disc 100 from dropping from the disc cartridge 310, particularly after the disc cartridge 310 is inserted vertically into the disc drive apparatus until the disc 100 is chucked. On the other hand, when the disc 100 is chucked, the space in which the disc 100 can operate can be expanded. In addition, this structure can make the cartridge body thinner.

(Eleventh embodiment)
Hereinafter, a disk cartridge 311 according to an eleventh embodiment of the present invention will be described with reference to the drawings.

  As shown in FIGS. 50 and 51, the disk cartridge 311 includes a cartridge lower body 11, a cartridge upper body 12, a pair of shutters 21 and 22, and a drop prevention member 23. Since the structure and function of these components are as described in the eighth embodiment as shown in FIGS. 52 to 56, detailed description thereof will be omitted.

  As shown in FIGS. 50 and 51, the disk cartridge 311 of the present embodiment is different from the disk cartridge 308 of the eighth embodiment in that a hole 20h is provided in the shutters 21 and 22.

  Specifically, in a state where the shutters 21 and 22 of the disk cartridge 311 are closed, a hole 20h is provided in a region corresponding to the center hole 100h of the disk 100 of the shutters 21 and 22. The hole 20h is constituted by notches 21h and 22h provided in the shutters 21 and 22, respectively.

  According to this structure, when the disk cartridge 311 is left with the upper surface of the disk 100 facing upward as shown in FIG. 50, dust entering from the center hole 100h passes through the holes 20h provided in the shutters 21 and 22. As a result, the disc cartridge 311 goes out without staying in the disc cartridge 311. That is, dust does not accumulate on the shutters 21 and 22. This prevents dust from adhering to the signal recording surface side 100A of the disc when the shutters 21 and 22 are open, that is, when the drive is mounted.

  The hole 20h has the same diameter and the same diameter as the center hole 100h in consideration that the disk cartridge 311 is left face-up (in the state shown in FIG. 50) or face-down (the cartridge lower body 11 is in an upward state). It is preferable to have a diameter. By satisfying such a relationship, it is possible to prevent dust from adhering to the shutters 21 and 22 when the disk cartridge 311 is left face-up, and the signal of the disk 100 when the disk cartridge 311 is left face-down. This is because dust can be prevented from directly adhering to the recording surface side 100A.

  In the disk cartridge 311, an opening / closing operation unit for opening and closing the shutters 21 and 22 is provided in the shutter 22, which is different from the disk cartridge 308 of the eighth embodiment. Specifically, as shown in FIGS. 51 and 57, the opening / closing operation part 22t, the elastic part 22v, and the lock projection part 22k formed therethrough are formed integrally with the shutter 22. Therefore, unlike the eighth embodiment, the opening / closing operation portion 22t is located on the right side of the head opening portion 21h when viewed from the disk 100 side. The functions and operations of the opening / closing operation unit 22t are the same as those of the disk cartridge 308 of the eighth embodiment.

(Twelfth embodiment)
Hereinafter, a disk cartridge 312 according to a twelfth embodiment of the present invention will be described with reference to the drawings.

  The disc cartridge 312 is different from the disc cartridge 311 of the eleventh embodiment in that the inner side surface 12i of the disc storage portion 10d has a flange 12t and a convex portion 20w around the hole 20h of the shutters 21 and 22. Yes. Hereinafter, these features will be described.

  As shown in FIG. 58, the flange 12t protrudes from the inner side surface 12i of the cartridge upper body 12 in the inner peripheral direction of the disc 100, and is formed in almost the entire outer peripheral portion of the disc storage portion 10d. A cross section of the disk cartridge 312 when the disk 100 is stored in the disk storage portion 10d is shown in FIG. When the shutters 21 and 22 are closed, as shown in FIG. 59, the outer peripheral portion of the signal recording surface 100A of the disc 100 is in contact with the flange 12t. As a result, the gap between the outer periphery of the disk 100 and the cartridge main body is closed, and dust can be prevented from entering the signal recording surface 100A.

  A gap 10w is provided between the flange 12t of the cartridge body 10 and the cartridge lower body 11, and when the shutters 21 and 22 are opened, as shown in FIGS. 60 and 61, a part of the shutters 21 and 22 is placed in the gap 10w. Prevents the cartridge body 10 and the shutters 21 and 22 from interfering with each other.

  In such a structure, as shown in FIG. 59, when the shutters 21 and 22 are closed, a gap 10z that leads to the outside is generated between the disk 100 and the shutters 21 and 22. Protrusions 21w and 22w are provided on the shutters 21 and 22 in the vicinity of the disc center hole 100h to close the gap 10z. As shown in FIG. 58, when the shutters 21 and 22 are closed, the convex portions 21w and 22w are in close contact with each other, and a convex portion 20w that closes the entire circumference in the vicinity of the disc center hole 100h is formed. This prevents dust from entering the signal recording surface 100A side of the disc 100 from the vicinity of the disc center hole 100h.

  There is a possibility that the tips of the convex portions 21 w and 22 w come into contact with the signal recording surface 100 </ b> A of the disc 100. For this reason, it is preferable to round the ridge lines of the convex portions 21w and 22w to prevent the disc from being damaged. The convex portions 21w and 22w may be formed integrally with the shutters 21 and 22, respectively. In this case, it is preferable to adhere or ultrasonically weld a non-woven fabric for preventing scratches to the portion of the convex portion 20w that contacts the disk 100, or to form a coating for preventing scratches. Further, the convex portions 21w and 22w themselves may be formed of a nonwoven fabric for preventing scratches on the disk or a coating for preventing scratches, and may be ultrasonically welded or fixed directly on the shutters 21 and 22.

  As well shown in FIG. 59, when the shutters 21 and 22 are closed, the disc 100 is lifted from the shutters 21 and 22 by the gap 10z by the protrusions 20w and the flanges 12t. Is held in. That is, most of the signal recording surface 100 A of the disk 100 is not in surface contact with the shutters 21 and 22. Accordingly, there is an effect that it is possible to prevent the signal recording surface 100A from being damaged even when the shutters 21 and 22 are not subjected to processing such as application of a non-scratch nonwoven fabric.

  62 and 63 show a disk cartridge having convex portions 21w ′ and 22w ′ expanded in the outer circumferential direction of the disk 100, FIG. 62 shows a state in which the shutters 21 and 22 are closed, and FIG. , 22 show the open state.

  As shown in FIGS. 62 and 63, the convex portions 21w ′ and 22w ′ are provided closer to the center side of the disc storage portion than the flange 12t provided in the disc storage portion 10d when the shutters 21 and 22 are open. It is preferable. Thereby, it can prevent that convex part 21w 'and 22w' and the collar 12t contact or interfere.

  The convex portions 21w ′ and 22w ′ may be formed integrally with the shutters 21 and 22, respectively. In this case, it is preferable that a non-woven fabric for preventing scratches is adhered or ultrasonically welded to the portions of the convex portions 21w ′ and 22w ′ that are in contact with the disk 100, or a coating for preventing scratches is formed. Further, the convex portions 21w ′ and 22w ′ themselves may be formed of a nonwoven fabric for preventing scratches on the disk or a coating for preventing scratches, and may be ultrasonically welded or fixed directly on the shutters 21 and 22. Good.

(13th Embodiment)
Hereinafter, a disk cartridge 313 according to a thirteenth embodiment of the present invention will be described with reference to the drawings.

  First, the general structure of the disk cartridge 313 will be described with reference to FIGS. Similar to the eighth embodiment, the disc 100 shown in FIGS. 64 and 65 has first and second surfaces. In FIG. 64, the first surface is shown, and a label or the like of a normal disc is drawn. The surface being shown is shown. The signal recording surface 100A, which is the second surface of the disk 100, is shown as the back surface in FIG.

  As shown in FIGS. 64 and 65, the disk cartridge 313 includes a cartridge lower body 11, a cartridge upper body 12, a pair of shutters 21 and 22, and a drop prevention member 23.

  As shown in FIG. 65, the cartridge lower body 11 has a chucking opening 11c opened so that a chucking member such as a spindle motor for rotating the disk 100 can enter from the outside, and the signal recording surface 100A of the disk 100. And a head opening 11h that is open so that a head that performs at least one of signal reproduction and recording enters and can be accessed. The cartridge lower body 11 faces the signal recording surface 100 </ b> A of the disk 100. The cartridge lower body 11 is formed by molding a synthetic resin.

  The head opening 11 reaches the side surface of the cartridge lower body 11. In order to prevent the rigidity of the cartridge lower body 11 from being weakened by the head opening 11 h, the bridge portion 11 b that connects the head opening 11 h is connected to the cartridge lower body 11. Has. On the back surface of the cartridge lower body 11, two positioning portions 11w for inserting cartridge positioning pins on the drive device side are provided.

  The cartridge upper body 12 has a circular disk opening 12w that allows the disk 100 to be taken in and out and opens the entire projection area of the disk 100 so that the upper surface of the disk is exposed. The cartridge upper body 12 and the cartridge lower body 11 are bonded or welded at the outer edge portion to constitute the cartridge body 10. The cartridge upper body 12 is also formed from a synthetic resin.

  The disc 100 is accommodated by the first inner side surface 11u facing the signal recording surface 100A of the disc 100 of the cartridge lower body 11 and the substantially cylindrical second inner side surface 12i constituting the disc opening 12w of the cartridge upper body 12. A disk storage unit 10d is configured. As a result, the first inner side surface 11u becomes the bottom of the disc storage portion 10d.

  In the disc storage portion 10d, a space is provided between the second inner surface 12i and the disc 100 so that the disc 100 can rotate. Further, the upper portion of the disc storage portion 10d is a disc opening portion 12w, and the disc 100 held in the disc storage portion 10d exposes one side thereof from the disc opening portion 12w to the outside.

  The drop-off prevention member 23 is detachably provided on the cartridge upper body 12 so that a part of the drop-off prevention member 23 projects into the disk opening 12w. As shown in FIGS. 64 and 65, two dropout prevention members 23 are provided in this embodiment. On the other hand, the cartridge upper body 12 is formed integrally with the cartridge upper body 12, and is provided with a drop-off preventing portion 12s protruding from the disk opening 12w. The two drop-off prevention members 23 and the drop-off prevention portion 12s are arranged at approximately equal intervals on the circumference of the disc opening 12w, and prevent the disc 100 from dropping from the disc opening 12w. In addition, two convex disk contact portions 12s ′ are provided in a part of the dropout prevention portion 12s. The height of the disk contact portion 12s ′ is the same height as the disk contact portion 23a of the drop-off prevention member 23 when viewed from the disk 100.

  With this structure, even when the disc cartridge 313 is used in a vertical or face-down state, the posture of the disc 100 can be kept stable. Therefore, when the disk cartridge 313 is inserted into the drive device in a vertical or face-down state and used, the effect of preventing the drop is particularly exerted. Note that the dropout prevention member 23 may not be detachably attached to the cartridge body 10. The drop prevention member 23 may be fixed to the cartridge upper body 12 as long as the disk 100 can be rotated or moved up and down in the disk storage portion 10d to such an extent that the disk 100 can be removed from the cartridge body 10.

  The shutters 21 and 22 are provided on the same plane between the signal recording surface 100A of the disc 100 and the inner surface 11u of the disc storage portion 10d. The shutters 21 and 22 have rotation holes 21u and 22u, respectively, and are a pair of rotations provided in an area other than the disk storage portion 10d of the cartridge body 10 and on the side opposite to the head opening 11h. The rotation holes 21u and 22u are fitted to the shaft 11s so as to be rotatable. Therefore, the shutters 21 and 22 move around the rotation shaft 11s so as to open or close the chucking opening 11c and the head opening 11h with respect to the outside. The shutters 21 and 22 are also formed from synthetic resin.

  In the vicinity of the rotation holes 21u and 22u of the shutters 21 and 22, a ring-shaped portion 21c and a pin-shaped portion 22c are provided, respectively. The ring-shaped portion 21c and the pin-shaped portion 22c have shapes that mesh with each other, and constitute an interlocking mechanism 20c that opens and closes the shutters 21 and 22 while interlocking with each other. The interlocking mechanism 20c may be constituted by another mechanism capable of interlocking operation such as a cam mechanism or a gear mechanism.

  Protective layers 21p and 22p are provided on the surfaces of the shutters 21 and 22 that face the disc signal recording surface 100A to prevent the disc 100 from being damaged or dust from entering the signal recording surface 100A.

  The protective layers 21p and 22p can be appropriately selected from a scratch-proof nonwoven fabric, a dust-proof nonwoven fabric, a scratch-proof coating layer, and a dust-proof coating layer. In this embodiment, the sheet | seat which consists of a nonwoven fabric for dust prevention is affixed or ultrasonically welded as the protective layers 21p and 22p.

  The lock protrusion 21k provided on the shutter 21 and the lock engaging portion 22k provided on the shutter 22 so as to mesh with the lock projection 21k constitute a lock mechanism 20k that locks the shutters 21 and 22 to open and close. With this structure, the shutters 21 and 22 can be locked to each other, so that it is possible to prevent the operator from opening the shutter easily. Then, adhesion of dust, fingerprints, scratches, etc. to the signal recording surface 100A of the disk 100 is prevented. The lock projection 21k is integrally formed with the shutter 21, and the lock engagement portion 22k is integrally formed with the shutter 22.

  The shutters 21 and 22 are provided with notches 21h and 22h. When the shutters 21 and 22 are closed, the notches 21h and 22h come into contact with each other to form a hole 20h. In the state where the shutters 21 and 22 are closed, the hole 20h is at a position corresponding to the center hole 100h of the disk 100, and the diameter of the hole 20h is substantially equal to the diameter of the center hole 100h of the disk 100. This prevents dust from adhering to the shutters 21 and 22 when the disk cartridge 313 is left face-up, and directly to the signal recording surface side 100A of the disk 100 when the disk cartridge 313 is left face-down. It is possible to prevent dust from adhering.

  As described in the eighth embodiment and the like, the shutters 21 and 22 have disk holding portions 21a, 21b, 22a, and 22b for holding the disk 100 when the shutter is closed, scattered on the disk circumference. It is integrally formed with the shutters 21 and 22 in the form. The portions of the disk holding portions 21a, 21b, 22a, and 22b that are in contact with the disk 100 are reverse tapered inclined surfaces. With these slopes, the disc 100 can be reliably held while being pressed toward the shutters 21 and 22 when the shutters 21 and 22 are closed.

  Further, in the present embodiment, only the disc holding portion 21b is coupled to the elastic portion 21d without being fixed to the shutter 21, and is formed so as to be freely movable in the radial direction of the disc 100 (toward the center of the disc). ing. As a result, even when the diameter or thickness of the disc to be mounted varies, the disc holding portions 21a, 21b, 22a, and 22b can hold the disc 100 reliably without rattling.

  A shutter opening / closing operation portion 22t for opening / closing the shutter 22 is formed integrally with the shutter 22 on the opposite side of the rotation hole 22u, that is, in the vicinity of the disc holding portion 22a. When the shutters 21 and 22 are attached to the cartridge body 10, the shutter opening / closing operation part 22t is located in the head opening part 11h below the bridge part 11b. When opening / closing the shutters 21 and 22, the opening / closing operation part 22t moves in the head opening part 11h along the bridge part 11b. With this arrangement, there is no need to separately provide a gap for moving the shutter opening / closing operation portion 22t in the cartridge body 10. In other words, it is not necessary to provide an extra space in the cartridge main body 10, and dust can be prevented from entering the cartridge main body 10. Further, since the shutter opening / closing operation portion 22t can be disposed in the head opening portion of the cartridge main body 10, a cartridge excellent in design can be provided.

  As shown in FIG. 66, the shutter 21 and the shutter 22 do not abut on a straight line but have a plurality of joint surfaces that are not on a straight line. Specifically, in the chucking opening 11c region, the shutter 21 and the shutter 22 have 21f and 22f, which are first joining surfaces, respectively, and in the head opening 11h region, the shutter 21 and the shutter 22 are respectively It has 21g and 22g which are the 2nd junction surfaces. The joining surfaces 21f and 22f abut on the symmetry center line of the disk cartridge 313 in this embodiment. On the other hand, the joining surfaces 21g and 22g are in contact with each other on a straight line shifted by a predetermined angle, here about 15 to 16 degrees from the symmetry center line. By adopting such a shape, the shutter 22 can be formed in an integrated shape from the vicinity of the shutter opening / closing operation portion 22t, and the rigidity of the shutter 22 can be sufficiently secured.

  The shutters 21 and 22 are urged in a direction in which the shutters 21 and 22 are closed by shutter springs 31 and 32 provided in regions other than the disk storage portion 10d, respectively. The shutter springs 31 and 32 are inserted into spring pillars 11t provided at two locations on the cartridge ridge lower body 11, respectively. In the present embodiment, torsion coil springs are used as the shutter springs 31 and 32. By using the springs having the same shape as the shutter springs 31 and 32, the cost is reduced. In addition to the torsion coil spring, various elastic members such as a compression spring, a plate spring, and a resin elastic spring can be used as the shutter spring.

  As shown in FIG. 65, the disk cartridge 313 includes a write protect member 40. The write protect member 40 is slidably mounted in the groove 11v of the cartridge lower body 11. By sliding the write protect member 40, the position of the convex portion 40t is moved, and the detection switch provided in the drive device is turned on or off corresponding to the position of the convex portion 40t. As a result, recording on the disc 100 can be prohibited or permitted.

  The disk cartridge 313 is constituted by the cartridge main body 10 including the cartridge lower body 11 and the cartridge upper body 12 described above, the drop-off preventing member 23, the shutters 21 and 22, the shutter springs 31 and 32, and the write protect member 40.

  When the cartridge lower body 11 and the cartridge upper body 12 are joined, the two rotation shafts 11 s of the cartridge lower body 11 are fitted into the two recesses 12 h of the cartridge upper body 12, respectively. As a result, the rigidity of the rotating shaft 11s is increased, and even when the shutters 21 and 22 are in the open state, the twist of the shutter rotating peripheral part due to the urging force of the shutter springs 31 and 32 can be reduced, and a reliable shutter opening amount can be secured. .

  On the upper surface of the cartridge main body 10 (cartridge upper body 12), a label surface 10f that can describe the contents written on the disc 100 to be stored and the insertion direction (arrow 1A) of the disc cartridge 313 into the drive device are shown. An arrow-shaped marking or recess 10a is provided.

  Also, the pair of recesses 10c and 10e provided on the two side surfaces of the cartridge body 10 parallel to the insertion direction 1A are used when the drive device loads the disk cartridge 313 or when the cartridge 313 is stored in the changer. It can be used as a lock for retraction or a depression for positioning. The slit portion 10b provided on one side surface of the cartridge main body can be used as a recess for detecting the front and back when the disk cartridge 313 is inserted into the drive device.

  Next, with regard to the operation of the disk cartridge 313, FIG. 66 showing a state where the shutter is closed, FIG. 67 showing a state where the shutter is opened, FIG. 68 which is a detailed view of the shutter lock portion, and a detailed view of the disc holding portion of the shutter. This will be described with reference to FIG.

  First, a state where the disk cartridge 313 is not mounted in the drive device, that is, a storage state will be described. At this time, the shutters 21 and 22 are closed as shown in FIG. 66, and the inclined surface 22a ′ of the disk holding part 22a of the shutter 22 abuts against the ridge of the disk 100 as shown in FIG. Thus, the disk 100 is held and pressed in the thickness direction 100t, the signal recording surface 100A is brought into surface contact with the sheet 22p of the shutter 22, and the disk 100 is held and fixed to the cartridge body 10. The other disk holding portions 21a, 21b, and 22b are also formed with inclined portions 21a ', 21b', and 22b ', respectively, and hold and fix the disk 100 to the cartridge body 10 in the same manner as the inclined portions 22a'.

  In this state, since the signal recording surface 100A of the disc 100 is in close contact with the sheets 21p and 22p, it is possible to prevent dust from adhering to the signal recording surface 100A. Further, dirt or fingerprints adhering to the signal recording surface 100A of the disc 100 can be obtained by forcibly rotating one side of the disc 100 exposed from the outside or by forcibly opening and closing the shutters 21 and 22. Can be wiped out.

  Further, since the shutters 21 and 22 are locked by the lock mechanism 20k, the operator cannot easily open the shutters 21 and 22. Therefore, the signal recording surface side 100A of the disc 100 can be protected, and adhesion of dust, fingerprints, scratches, etc. can be prevented.

  A hole 20h formed by the notches 21h and 22h of the shutters 21 and 22 is provided in the area of the shutters 21 and 22 corresponding to the center hole 100h of the disk 100. Therefore, it is possible to prevent dust from entering from the center hole 100h from adhering to the shutters 21 and 22 when the cartridge 313 is left unattended.

  Further, when the shutters 21 and 22 are closed, of the joint surfaces of the shutters 21 and 22, the joint surfaces 21 f and 22 f that are abutted on at least the head opening portion 11 h and the chucking opening portion 11 c and the joint surface 21 g and 22g is superimposed in the thickness direction of the disk 100 as shown in FIGS. Accordingly, when the shutters 21 and 22 are not completely closed due to reasons such as the diameter of the disk 100 being varied, or when the shutters 21 and 22 are not completely locked, the shutters 21 and 22 are completely closed. Even if it is a case where it does not obstruct | occlude, a clearance gap is not produced in the joint surface of the shutters 21 and 22. For this reason, even in such a case, it is possible to reliably prevent dust, fingerprints, scratches, and the like from adhering to the disk 100.

  As shown in FIG. 70, the shutters 21 and 22 are joined around the head opening 11h so that the joining surface 22g of the shutter 22 is above the joining surface 21g of the shutter 21. On the other hand, as shown in FIG. 71, in the vicinity of the chucking opening 11c, the shutters 21 and 22 are joined such that the joining surface 21f of the shutter 21 is above the joining surface 22f of the shutter 22. In this way, the angles of the joint surfaces may be different between the plurality of joint surfaces with which the shutters 21 and 22 abut. With such a structure, the two shutters 21 and 22 are reliably engaged with each other in the thickness direction of the disk, so that each of the shutters 21 and 22 can be prevented from being lifted. In the state where 22 is closed, the rigidity of the joint surfaces of the shutters 21 and 22 can be increased.

  In this embodiment, the shutters 21 and 22 have joint surfaces 21g, 22g, 21f, and 22g as shown in FIGS. 70 and 71. However, the positions of the joint surfaces of the shutters 21 and 22 and the way of joining are also described. May be in a position other than that shown in FIGS. For example, the joining surfaces 21g and 22g shown in FIG. 70 may be arranged around the head opening portion 11h and joined, or conversely, the joining surfaces 21f and 22f shown in FIG. It may be arranged around 11c and joined. As a result, the rigidity when the shutters 21 and 22 are closed is further improved, the gap between the joint surfaces can be reduced, and dust can be prevented from entering the cartridge.

  In the state where the shutters 21 and 22 are closed, the convex portions 21j and 22j provided on the shutters 21 and 22 shown in FIG. 68 have two shutter stoppers 12f provided on the cartridge upper body 12 shown in FIG. Abut. Therefore, the shutters 21 and 22 are restricted with respect to rotation and do not move from the closed state. Thereby, it is possible to prevent backlash of the shutter, and it is possible to prevent damage to the shutter due to intentional handling of the operator. Further, since the rotation of the shutters 21 and 22 is restricted, the position of the shutter opening / closing operation unit 22t does not vary. For this reason, when the disk cartridge 313 is inserted into the drive device, the shutter opening / closing mechanism of the drive device can reliably engage the shutter opening / closing operation portion 22t.

  Next, a state where the disk cartridge 313 is mounted in the drive device will be described. As shown in FIG. 66, when the disk cartridge 313 is inserted into the drive device in the 1A direction, the cartridge positioning pin provided on the drive device engages with the positioning hole 11w of the disk cartridge 313, and the disk cartridge 313 in the drive device is engaged. Positioning in the horizontal direction and the height direction is performed.

  Next, the shutter opening / closing member of the shutter opening / closing mechanism provided in the drive device is engaged with the shutter opening / closing operation portion 22t shown in FIG. 68, and the unlocking member of the shutter opening / closing mechanism is connected by the lock elastic portion 21e of the shutter 21. The lock pressing portion 21y is pressed in the 20A direction. As a result, the lock projection 21k and the lock engagement portion 22k of the lock mechanism 20k are separated, and the lock is released. In this state, the shutter opening / closing operation part 22t is simultaneously moved in the 20B direction by the shutter opening / closing member. As shown in FIG. 67, the shutter 21 rotates against the urging force of the shutter spring 31 around the rotation shaft 11s. Along with this, the shutter 22 interlocked by the interlocking mechanism 20c similarly rotates against the urging force of the shutter spring 32. Therefore, when the shutter 21 is completely opened, the opening of the shutter 22 is also completed.

  At this time, the lock protrusion 21k and the lock pressing portion 21y are returned to their original shape positions by the lock elastic portion 21e. Therefore, the plastic deformation of the lock elastic portion 21e formed of resin does not occur. In this way, the signal recording surface 100A of the disk 100 is exposed to the outside through the chucking opening 11c and the head opening 11h. Further, the disk 100 held by the disk holding portions 21a, 21b, 22a, and 22b is released from the holding by the rotation of the shutters 21 and 22, and becomes rotatable in the disk storage portion 10d.

  Subsequently, the spindle motor, the turntable, and the head of the drive device enter the chucking opening 11c and the head opening 11h, respectively, so that recording or reproduction on the disk 100 is possible.

  In this way, the shutter 21 is only pushed by pushing the shutter opening / closing operation portion 22t in the direction of the arrow 20B at the same time while pushing the lock projection portion 21k in the 20A direction by a projection or the like from the outside to disengage the lock engagement portion 22k. And 22 are rotated to open the chucking opening 11c and the head opening 11h to the outside, and at the same time, the holding of the disk 100 by the disk holding parts 21a, 21b, 22a, 22b can be released. Therefore, since it is possible to prevent the operator from opening the shutter or removing the disk easily, it is possible to prevent dust, fingerprints, scratches, and the like from adhering to the disk 100.

  Next, a state where the disk cartridge 313 is ejected from the drive device will be described. When the eject mechanism of the drive device is activated, the shutter opening / closing member engaged with the shutter opening / closing operation unit 22t is separated from the shutter opening / closing operation unit 22t. As a result, the shutters 21 and 22 cannot be kept open, and the shutters 21 and 22 urged in the closing direction by the shutter springs 31 and 32 rotate in the closing direction. As a result, the shutters 21 and 22 close the head opening 11h and the chucking opening 11c. At this time, the shutters 21 and 22 are locked by the lock mechanism 20k. The disk 100 is held by the disk holding units 21a, 21b, 22a, and 22b, and returns to the original state. In this state, the cartridge 313 is ejected from the drive device.

  In the disk cartridge 313, as shown in FIG. 69, the height of the disk contact portion 23a of the drop-off prevention member 23 provided in the cartridge body 10 and the height of the disk contact portion 12s ′ of the cartridge upper body 12 are the same. is there. Further, the inclined surface portions 21a ′ (21b ′, 22a ′, 22b ′) of the disk holding portions 21a (21b, 22a, 22b) of the shutters 21 and 22 are located above the disk 100, that is, above the disk contact portions 23a and 12s ′. It is formed high toward the 100u direction. Thus, even when the disk cartridge 313 is used in a vertical state or in a reverse state depending on the configuration of the drive device, the shutters 21 and 22 can reliably hold the disk 100. For example, particularly when the disc 100 is used in the face-down state, when the disc 100 is released from the chucking state, the disc 100 abuts against the disc abutting portions 23a and 12s ′, and maintains a stable horizontal state. When the shutters 21 and 22 shift to the closed state in this state, the disk 100 comes into contact with the inclined surface 21a ′ (21b ′, 22a ′, 22b ′) and smoothly slides on the inclined surface to hold the disk holding portion 21a (21b, 22a, 22b). Is held securely.

  As described above, according to the disk cartridge of this embodiment, the cartridge body has a structure having a disk opening, and covers only one surface of the disk. Further, by providing the shutter opening / closing operation portion at the head opening of the cartridge body, it is not necessary to form an unnecessary gap in the cartridge body. This prevents dust from entering the cartridge body.

  Further, the two shutters are brought into contact with each other on the center line of the disk in the chucking opening area, and are brought into contact with each other on a straight line shifted by a predetermined angle from the center line of the disk in the head opening area. Thereby, it can be set as the shape integrated from the shutter opening / closing operation part vicinity, and the rigidity of a shutter can fully be ensured.

  Further, since the two shutters are configured to be opened and closed, the operator cannot easily open the shutters. Therefore, adhesion of dust, fingerprints, scratches, etc. to the disk can be prevented.

  In addition, at least one of the plurality of disk holding portions is not fixed to the shutter but is coupled by an elastic portion, and the force of the shutter spring is also applied to allow elastic deformation in the radial direction of the disk. As a result, even when the diameter of the disc to be mounted varies, the disc can be securely held without rattling.

(Fourteenth embodiment)
A disk cartridge 314 according to a fourteenth embodiment of the present invention will be described below with reference to FIGS. In the disk cartridge 314 of this embodiment, the same components as those of the disk cartridge 313 of the thirteenth embodiment are denoted by the same reference numerals.

  The disk cartridge 314 differs from the disk cartridge 313 of the thirteenth embodiment in that the shape of the inner upper surface 12u of the cartridge upper body 12 (FIG. 79) and the shapes of the disk holding portions 21a, 21b, 22a and 22b (FIG. 72 to 79), and the shape of the drop-off prevention member 53 (FIGS. 72, 77, and 78). The disc cartridge 314 further has a disc receiving portion 60 (FIGS. 72 and 81). Hereinafter, these differences of the disk cartridge 314 will be mainly described.

  In the disc cartridge 313 of the thirteenth embodiment, the heights of the disc holding portions 21 a, 21 b, 22 a, and 22 b are substantially the same along the outer periphery of the disc 100. On the other hand, in the disk cartridge 314 of the present embodiment, as shown in FIGS. 73 and 79, protrusions are provided on part of the disk holding portions 21b, 22a and 22b. Specifically, the disc holding portions 21b, 22a and 22b include protrusions, and first regions 121b, 122a and 122b having a first height h1, and a second region having a second height h2. 221b, 222a and 222b, respectively. On the other hand, the disk holding portion 21a includes only the second area 221a having the second height h2.

  The first height h1 is larger than the second height h2, but is approximately the same as the height of the disk holding portions 21a, 21b, 22a, 22b of the disk cartridge 313 of the thirteenth embodiment. In other words, the disk holding portions 21a, 21b, 22a, and 22b of the present embodiment, except for the first areas 121b, 122a, and 122b, are the disk holding portions 21a, 21b, and 22a of the disk cartridge 313 of the thirteenth embodiment. , 22b.

  As shown in FIGS. 74 and 75, the upper surface of the first region 122a of the disk holding portion 22a is provided with a step 223 that is higher on the disk side along the outer periphery of the disk. Similarly, the upper surface of the first area 121b of the disk holding part 21b and the first area 122b of the disk holding part 22b are also provided with steps.

  The first areas 121b, 122a, and 122b are areas that contact the disk first in the respective disk holding portions 21b, 22a, and 22b when the shutters 21 and 22 are closed, and therefore, the second area 221b. , 222a, 222b is in contact with the disk 100 before. The disk holding portions 21a, 21b, 22a, and 22b move as the shutters 21 and 22 open and close. 77 and 78 well show the positions of the disk holding portions 21a, 21b, 22a, and 22b when the shutters 21 and 22 are closed and open. 79 and 80 show a BB cross section and a CC cross section shown in FIG.

  As shown in FIGS. 77 to 79, on the inner upper surface 12u of the cartridge upper body 12, when the shutters 21 and 22 are opened and closed, the first regions 121b, 122a, and 122b of the disk holding portions 21b, 22a, and 22b pass. The regions 12y, 12x, 12z to be depressed are recessed. On the other hand, the regions 12y ′, 12x ′, and 12z ′ through which the second regions 221b, 222a, and 222b pass are not recessed. Therefore, the thickness of the cartridge upper body 12 in the regions 12x, 12y, and 12z is thinner than the regions 12x ′, 12y ′, 12z ′, and other regions.

  As shown in FIGS. 76 and 79, the tip of the first region 122a is located above the lower surface of the dropout prevention member 53. Further, the tip portion of the first region 122a of the disc holding portion 22a enters a recess in the region 12x provided on the inner upper surface 12u of the cartridge body 12, and the recess in the region 12x is the tip of the first region 122a. Receiving part. At the tip portion of the first region 122a, due to the step 223, only a part of the upper surface of the first region 122a is in contact with the inner upper surface 12u. The second region 222 a is not in contact with the inner upper surface 12 u of the cartridge upper body 12.

  In order to make the opening and closing operations of the shutters 21 and 22 smooth, it is preferable that the friction caused by the contact between the front end portion of the first region 122a of the disk holding portion 22a and the inner upper surface 12u of the cartridge upper body 12 is small. Therefore, the tip portion of the first region 122a of the disc holding portion 22a has a convex shape in which the cross section along the radial direction of the disc 100 is a part of an arc. The step 223 is provided to compensate for a lack of strength due to the sharp shape of the tip portion, to increase the molding accuracy of the tip portion, and to facilitate molding.

  As shown in FIG. 80, also in the disc holding portion 22b, the tip of the first region 122b is located above the lower surface of the dropout prevention member 53. Further, the tip portion of the first region 122b enters a recess in the region 12z provided on the inner upper surface 12u of the cartridge body 12, and the recess in the region 12z receives the tip portion of the first region 122b. . Although not shown, also in the disk holding portion 21b, the tip of the first region 121b is located above the lower surface of the drop-off preventing member 53, and is in a recess of the region 12y provided on the inner upper surface 12u of the cartridge upper body 12. It has entered.

  In this manner, the regions 12x, 12y, and 12z of the inner upper surface 12u of the cartridge upper body 12 are recessed, and a part of the disk holding portion is inserted into the recessed portion, whereby the recessed portions of the regions 12x, 12y, and 12z are formed. The entire disk cartridge 314 can be made thinner by the depth.

  According to such a structure, even when the cartridge is used in a vertical or face-down state, when the disk 100 is released from chucking and the shutters 21 and 22 are closed, the disk holding portion 22a is securely inserted. The inclined portion 122a ′ of the first region 122a contacts the disc 100. Then, the inclined portion 122a ′ is smoothly slid and the inclined portion 222a ′ of the second region 222a of the disk holding portion 22a comes into contact (FIG. 74). At this time, the inclined portion 221a ′ of the second region 221a of the disc holding portion 21a where no protrusion is provided also contacts the disc 100. As a result, the disk holding portions 21a and 22a cooperate to hold the disk 100. The disk holding units 21b and 22b hold the disk 100 by the same operation. Therefore, even if the disk cartridge is thinned, the shutter can be reliably closed in any posture, and the disk can be reliably held.

  If the entire disk cartridge is to be made thin with the shape of the disk holding portion being the same as that of the first embodiment, the disk holding of the inner upper surface 12u of the cartridge upper body 12 as shown in FIG. The regions 12x, 12x ′, 12y, 12y′12z, and 12z ′ through which the entire parts 22a, 21b, and 22b pass need to be depressed. In this case, the thickness of the cartridge upper body 12 is reduced over a considerably large area, and the strength of the entire disk cartridge is impaired. On the other hand, according to the disk cartridge 314, since the regions 12x, 12y, and 12z whose thickness is thin are narrow, the thickness of the disk cartridge can be reduced without deteriorating the strength of the entire disk cartridge.

  In the present embodiment, three of the four disk holding portions are provided with projections to form the first area, but various numbers can be selected according to the number of disk holding portions and the shape of the shutter.

  Another difference of the disc cartridge 314 of the present embodiment from the disc cartridge 313 of the thirteenth embodiment is the configuration of the dropout prevention member 53.

  As shown in FIG. 72, the drop-off preventing member 53 has a shape obtained by cutting out a part of a disk. A cutout 54 substantially corresponding to the dropout prevention member 53 is provided so as to contact the disk opening 12w of the cartridge upper body 12, and the dropout prevention member 53 is engaged with the cutout 54 so as to be rotatable. As shown in FIG. 77, the dropout prevention member 53 is held by rotation so that a part of the dropout prevention member 53 protrudes into the disk opening 12w of the cartridge upper body 12. In addition, as shown in FIG. 78, by rotating the drop-off prevention member 53, the drop-off prevention member 53 can be held in the upper body of the cartridge, and the drop-off prevention member 53 can be held even when the protruding portion is not in the disk opening 12w. . When it is a problem that the drop-off prevention member 53 is detached from the notch 54, an unevenness or the like that engages the side surface of the drop-off prevention member 53 and the side surface of the cartridge upper body 12 forming the cut-out 54 is provided. That's fine.

  By adopting such a structure, the thickness of the drop-off prevention member 53 can be made substantially the same as that of the upper surface of the cartridge upper body 12, so that the thickness of the entire disk cartridge 314 can be reduced.

  In the disc cartridge 314 of this embodiment, the next characteristic feature is that, as shown in FIGS. 72, 77, 78 and 81, the inside of the bottom of the disc storage portion formed by the inner lower surface 11u and the inner side surface 11i of the cartridge lower body. A disk receiving portion 60 is provided around the circumference. The disk receiving portion 60 has an upper surface 60a parallel to the inner lower surface 11u of the cartridge lower body.

  When the shutters 21 and 22 are in the closed state and the disc 100 is held by the disc holding portion, the vicinity of the outer periphery of the signal recording surface 100A of the disc 100 and the upper surface 60a of the disc receiving portion 60 are in contact with each other. As a result, it is possible to prevent dust from adhering to the signal recording surface 100A of the disk 100 and dust from accumulating on the inner lower surface 11 of the cartridge lower body.

  The shape of the disk receiving portion 60 may be other than that shown in FIG. For example, as shown in FIG. 82, a disk receiving portion 76 having a tapered shape provided so as to contact the inner lower surface 11u and the inner side surface 11i of the cartridge lower body may be provided. In this case, when the shutters 21 and 22 are closed and the disc 100 is held by the disc holding portion, the outer periphery of the signal recording surface 100A of the disc 100 is in contact with the disc receiving portion 76.

(Fifteenth embodiment)
A disk cartridge 315 according to a fifteenth embodiment of the present invention will be described below with reference to FIGS. In the disk cartridge 315 of the present embodiment, the same components as those of the disk cartridge 314 of the fourteenth embodiment are denoted by the same reference numerals.

  As shown in FIG. 83, the disc cartridge 315 includes four types of recesses 85, 86, 87 on the inner surface 11u of the cartridge lower body 11 in contact with the shutters 21 and 22, and the lower surfaces 21v and 22v of the shutters 21 and 22. It differs from the disc cartridge 314 in that 88a to 88c are provided. These four types of recesses will be described in order. The depth of the recess is, for example, about 0.1 mm to 0.3 mm in the case of a disc cartridge that holds a 12 cm disc.

  As best shown in FIG. 84 showing the closed state of the shutters 21 and 22 and FIG. 85 showing the opened state, first, when the shutters 21 and 22 are opened and closed, the disk holding portions 21a of the shutters 21 and 22; A first recess 86 is provided in the region of the inner lower surface 11u of the cartridge lower body 11 with which 21b, 22a and 22b are in contact.

  The disc holding portions 21a, 21b, 22a and 22b are sandwiched between the cartridge upper body 12 and the lower body 11 with almost no gap. When the disk cartridge 315 is assembled or due to dimensional variations in the parts constituting the disk cartridge 315, the disk holding portions 21a, 21b, 22a and 22b may come into strong contact with the cartridge upper body 12 and the lower body 11. . As a result, friction between the disk holding portions 21a, 21b, 22a and 22b and the cartridge upper body 12 or the lower body 11 increases, and the opening / closing operation of the shutters 21 and 22 becomes unstable, or dust is generated by friction.

  By providing the first recess 86, a gap is formed in the lower part of the disk holding portions 21a, 21b, 22a and 22b. Therefore, such friction can be reduced and the opening / closing operation of the shutters 21 and 22 is stabilized. And dust generation due to friction can be reduced.

  The second recess 87 is provided in a region where the outer edge portions of the shutters 21 and 22 are located when the shutters 21 and 22 are closed. As shown in FIGS. 84 and 86, the second recess 87 is provided across the outer side and the inner side including the line of the inner lower surface 11u of the cartridge lower body 11 corresponding to the outer edge of the shutters 21 and 22. Is preferred.

  Since the disk cartridge 315 is stored with one side of the disk exposed, the disk 100 can be pressed as shown by an arrow A as shown in FIG. In order to protect the signal recording surface 100A of the disc 100, the nonwoven fabrics 21s and 22s are provided, but the outer edges of the shutters 21 and 22 are not completely attached. For this reason, when the disc 100 is pressed as indicated by the arrow A, the outer edge portions of the shutters 21 and 22 may come into contact with the signal recording surface 100A of the disc 100, and the signal recording surface 100A may be damaged.

  However, by providing the second recess 87, the outer edge portions of the shutters 21 and 22 can be deformed so that a part thereof enters the second recess 87. This disperses the pressing force and prevents the outer edge portions of the shutters 21 and 22 from coming into strong contact with the signal recording surface 100A of the disc 100.

  The third concave portion is the third concave portion 88a provided on the inner lower surface 11u so as to surround the chucking opening portion 11c and the head opening portion 11h, and the shutters 21 and 22 when the shutters 21 and 22 are closed. A third recess 88b provided in a region of the inner lower surface 11u that does not overlap, and a third recess provided in a region of the inner lower surface 11u that overlaps the shutters 21 and 22 in a state where the shutters 21 and 22 are closed. 88c is included. The third recesses 88b and 88c are provided in an arc shape along the inner surface of the disc storage portion. In the present embodiment, three third recesses 88a are provided.

  The disk cartridge 315 includes various structures for preventing dust from entering the disk cartridge and the dust from adhering to the signal recording surface of the disk, such as a disk receiving portion. It is difficult to completely prevent adhesion.

  The third recess functions to store dust that has entered the disk cartridge 315. Specifically, dust moves to these third recesses as the shutters 21 and 22 open and close. The dust that has once entered the third recess does not come into contact with the shutters 21 and 22, and thus remains in the third recess without coming out of the third recess again. By storing dust in the third recess in this way, it is possible to reduce malfunction of the shutter due to dust and dust generation due to friction.

  Such an effect can also be obtained by the first recess 86 and the second recess 87. Therefore, the first recess 86, the second recess 87, and the third recesses 88a to 88c do not necessarily have to be all provided, and even if any one of them is provided, at least the operation of the shutter due to dust. Dust generation due to defects or friction can be reduced.

  Further, in order to more effectively remove dust that has entered between the shutters 21 and 22 and the inner lower surface 11u of the cartridge lower body 11 and collect the dust in the second recess 87 or the like, the lower surfaces 21v and 22v of the shutters 21 and 22 A recess 85 may be further provided along the outer edge portion. In this case, as shown in FIG. 84, it is preferable to provide a recess 85 on the center side of the cartridge with respect to the second recess 87 in a state where the shutters 21 and 22 are closed. 86, the recesses 85 of the shutters 21 and 22 and the second recess 87 of the inner lower surface 11u of the cartridge lower body 11 are preferably not in communication with the shutters 21 and 22 closed.

  By providing the concave portion 85, the outer edge portions of the shutters 21 and 22 are more easily deformed. Therefore, even if the force indicated by the arrow A is applied to the disc 100, the outer edges of the shutters 21 and 22 are in strong contact with the signal recording surface 100A, and the risk of scratching the signal recording surface 100A is reduced. There is also an effect that can be done. Further, by providing a non-woven fabric or the like in the recesses 86, 87, 88a, 88b, and 88c by welding or adhering, the gap of the cartridge body can be filled, and dust from the outside can be prevented more firmly.

  In this embodiment, an example in which various concave portions are provided in the disk cartridge 314 of the fourteenth embodiment is shown, but these concave portions may be provided in the disk cartridges of the eighth to thirteenth embodiments.

(Sixteenth embodiment)
A disk cartridge 316 according to the sixteenth embodiment of the present invention will be described below with reference to FIGS. In the disk cartridge 316 of the present embodiment, the same components as those of the disk cartridge 313 of the thirteenth embodiment are denoted by the same reference numerals.

  As shown in FIG. 88, the disc cartridge 316 of the present embodiment includes a first opening / closing operation portion 22t on the first side surface 10p of the cartridge body that is approximately perpendicular to the disc insertion direction 1A, and the second side surface. 10q includes a second opening / closing operation unit 93. Among these, the first opening / closing operation part 22t has the same structure as the opening / closing operation part 22t of the disc cartridge of the thirteenth embodiment.

  As shown in FIG. 89, the second opening / closing operation section 93 has a gear shape having a hole that can be inserted into the rotary shaft 11q provided in the cartridge lower body 11. An opening 11r is provided on the side surface of the cartridge lower body 11 such that a part of the second opening / closing operation portion 93 is exposed from the second side surface 10q of the cartridge body 10 when the second opening / closing operation portion 93 is inserted into the rotation shaft 11q. . The rotating shaft 11q may be provided on the cartridge upper body 12.

  Of the two shutters 21 and 22 that open or close the head opening 11h and the chucking opening 11c provided in the cartridge lower body 11, the shutter 22 that is the first shutter member has a first opening / closing operation portion 22t. It is integrally formed. On the other hand, a sector gear 21m that engages with a gear-shaped second opening / closing operation portion 93 is provided in the vicinity of the disk holding portion 21b on the outer surface of the shutter 21 that is the second shutter member. The center of the sector gear 21m coincides with the rotation hole 21u of the shutter 21. A recess 21n is provided adjacent to the sector gear 21m. The concave portion 21n creates a space in which the gear-shaped second opening / closing operation portion 93 can engage with the sector gear 21m.

  In order to open and close the shutters 21 and 22 using the first opening / closing operation part 22t, first, as shown in FIG. 90, the engagement state of the lock mechanism 20k including the lock projection part 21k and the lock engagement part 22k is released. To do. Then, as indicated by the arrow 22W, the first opening / closing operation portion 22t is slid along the first side surface 10p of the cartridge. As a result, as shown in FIG. 91, the movement of the shutter 22 is transmitted to the shutter 21 via the interlocking mechanism 20c, and the shutters 21 and 22 cooperate to open the head opening 11h and the chucking opening 11c.

  On the other hand, in order to open and close the shutters 21 and 22 using the second opening / closing operation section 93, first, as shown in FIG. 90, the engagement state of the lock mechanism 20k is released. Next, the second opening / closing operation section 93 is rotated as indicated by an arrow 93A. Then, it engages with the gear of the second opening / closing operation section 93, and the sector gear 21m starts to rotate around the rotation hole 21u. This movement is an opening operation of the shutter 21. Since the movement of the shutter 21 is transmitted to the shutter 22 via the interlocking mechanism 20c, the shutters 21 and 22 cooperate to open the head opening 11h and the chucking opening 11c. As shown in FIG. 91, when the shutters 21 and 22 completely open the head opening 11h and the chucking opening 11c, a part of the second opening / closing operation part 93 is in a recess 21n provided in the shutter 21. Get in.

  When closing the shutters 21 and 22, the first opening / closing operation part 22t may be slid in the direction opposite to 22W, or the second opening / closing operation part 93 may be rotated in the direction opposite to 93A. In the present embodiment, since the shutter springs 31 and 32 are provided so that the force acts in the direction in which the shutters 21 and 22 are closed, the force that opens the shutters 21 and 22 against the force of the shutter springs 31 and 32, or If the force for maintaining the open state is not applied to the first opening / closing operation unit 22t and the second opening / closing operation unit 93, the shutters 21 and 22 are closed without performing the above-described operation.

  In the disc cartridge 316 of the present embodiment, the opening / closing operation portions of the shutters 21 and 22 are provided on both a plane perpendicular to the disc insertion direction and a plane parallel to the disc insertion direction. Therefore, even in a disk drive device that supports only a disk cartridge whose shutter opening / closing operation section is provided on a side surface perpendicular to the disk cartridge insertion direction, the shutter opening / closing operation section is positioned in the disk cartridge insertion direction. Even in the case of a disk drive device that supports only the disk cartridge provided on the side parallel to the disk, signals can be recorded / reproduced with respect to the disk stored in the disk cartridge of the present embodiment.

  Further, according to the disk cartridge 316 of the present embodiment, the second opening / closing operation section 93 provided on the side surface parallel to the insertion direction of the disk cartridge 316 has a gear shape. Therefore, the shutter opening / closing mechanism provided in the disk drive device can also be formed by various gears that can be engaged with the second opening / closing operation section 93, and the shutters 21 and 22 of the disk cartridge 316 can be surely secured by a relatively simple mechanism. Can be opened and closed.

  In the above embodiment, the sector gear 21m is provided in the vicinity of the disk holding portion 21b. This is because if it is provided at this position, the distance from the sector gear 21m to the rotation hole 21u of the shutter 21 can be reduced, and the length of the sector gear 21m required to completely open the shutter 21 can be shortened. However, the place where the sector gear 21m is formed is not limited to this position. For example, as shown in FIGS. 92 and 93, the sector gear 21m is provided at a position where the center of the disk is approximately on the extended line of the arc of the sector gear 21m, and the second opening / closing operation unit is engaged with the sector gear 21m. 93 may be provided. If the second opening / closing operation section 93 is provided at this position, the length of the sector gear 21m required to completely open the shutter 21 is increased, but the distance from the rotation hole 21u can also be increased. This corresponds to increasing the distance between the fulcrum and the action point, and the shutter 21 and 22 can be opened and closed by rotating the second opening / closing operation unit 93 with a lighter force.

(Seventeenth embodiment)
A disk cartridge 317 according to a seventeenth embodiment of the present invention will be described below with reference to FIGS. In the disk cartridge 317 of the present embodiment, the same components as those of the disk cartridge 316 of the sixteenth embodiment are denoted by the same reference numerals.

  As shown in FIG. 94, the disk cartridge 317 of the present embodiment replaces the second opening / closing operation section 93 of the disk cartridge 316 of the sixteenth embodiment with the second opening / closing operation section 94 as the second opening / closing operation section 94. It is provided on the side surface 10q.

  As well shown in FIG. 95, the second opening / closing operation portion 94 is a link member that can slide along the opening 11r provided on the side surface of the cartridge lower body 11, and bends in the middle thereof. Yes. Further, a projection 94 a is provided at the end of the second opening / closing operation portion 94, and this projection 94 a engages with a groove 21 i provided in the vicinity of the disc holding portion 21 b of the shutter 21.

  96 and 97 show a state where the shutters 21 and 22 of the disk cartridge 317 are closed and opened, respectively. As described in the thirteenth and sixteenth embodiments, the shutters 21 and 22 can be opened and closed by sliding the first opening / closing operation unit 22t in the direction of the arrow 22w or the opposite direction.

  In order to open and close the shutters 21 and 22 using the second opening / closing operation unit 94, first, the engaged state of the lock mechanism 20k is released as shown in FIG. Next, the second opening / closing operation unit 94 is slid in the direction indicated by the arrow 94B. By this operation, a force acts to move the protrusion 94a of the second opening / closing operation unit 94 in the direction of the arrow 94B. As a result, the shutter 21 opens around the rotation hole 21u. Since the movement of the shutter 21 is transmitted to the shutter 22 via the interlocking mechanism 20c, the shutters 21 and 22 cooperate to open the head opening 11h and the chucking opening 11c. The point that the shutters 21 and 22 can be closed by sliding the second opening / closing operation part 94 in the direction opposite to the arrow 94B and the force of the shutter springs 31 and 32 are the same as in the sixteenth embodiment. .

  Similarly to the disk cartridge of the sixteenth embodiment, the disk cartridge of the present embodiment is also a disk drive device corresponding only to the disk cartridge in which the opening / closing operation part of the shutter is provided on the side surface perpendicular to the insertion direction of the disk cartridge. Even in the case of a disk drive device that supports only a disk cartridge whose shutter opening / closing operation portion is provided on a side surface parallel to the insertion direction of the disk cartridge, it is accommodated in the disk cartridge of the present embodiment. A signal can be recorded / reproduced to / from a disc.

  Also, as shown in FIGS. 96 and 97, the direction (94B) for operating the second opening / closing operation unit 94 to open the shutters 21 and 22 is opposite to the insertion direction (1A) of the disk cartridge. And parallel. For this reason, if a protrusion or the like that engages with the second opening / closing operation section 94 is provided in the disk drive device, the protrusion is inserted into the second opening / closing operation section 94 when the disk cartridge of this embodiment is inserted into the disk drive apparatus. The shutters 21 and 22 of the disk cartridge can be opened in conjunction with the insertion operation of the disk cartridge. Therefore, the shutter opening / closing mechanism provided in the disk drive device can be simplified.

(Eighteenth embodiment)
A disk cartridge 318 according to an eighteenth embodiment of the present invention will be described below with reference to FIGS. Also in the disk cartridge 318 of the present embodiment, the same components as those of the disk cartridge 316 of the sixteenth embodiment are denoted by the same reference numerals.

  As shown in FIG. 98, the disk cartridge 318 of the present embodiment replaces the second opening / closing operation part 93 of the disk cartridge 316 of the sixteenth embodiment with the second opening / closing operation part 96 on the second side surface. 10q.

  As shown in FIG. 99, the second opening / closing operation unit 96 is a belt member connected to the disk holding unit 21 a of the shutter 21. A protrusion 96 a is provided at the end of the belt member, and the protrusion 96 a can slide along an opening 11 r provided on the side surface of the cartridge lower body 11. The second opening / closing operation unit 96 may be formed integrally with the shutter 21.

  The state in which the shutters 21 and 22 of the disk cartridge 318 are closed and opened is shown in FIGS. 100 and 101, respectively. As described in the sixteenth and seventeenth embodiments, the shutters 21 and 22 can be opened and closed by sliding the first opening / closing operation portion 22t in the direction of the arrow 22w or in the opposite direction.

  In order to perform the opening / closing operation of the shutters 21 and 22 using the second opening / closing operation unit 96, first, as shown in FIG. 100, the engagement state of the lock mechanism 20k is released. Next, the protrusion 96a of the second opening / closing operation unit 96 is slid in the direction indicated by the arrow 96B. By this operation, a force is applied to the shutter 21 so that the distal end portion of the shutter 21 is pulled in the direction of the arrow 96C around the rotation hole 21u. Since the movement of the shutter 21 is transmitted to the shutter 22 via the interlocking mechanism 20c, the shutters 21 and 22 cooperate to open the head opening 11h and the chucking opening 11c. When closing the shutters 21 and 22, the reverse operation is performed.

  Similarly to the disc cartridge of the sixteenth embodiment, the disc cartridge of the embodiment is also a disc drive device that supports only the disc cartridge in which the opening / closing operation portion of the shutter is provided on the side surface perpendicular to the insertion direction of the disc cartridge. However, even in a disk drive device that supports only a disk cartridge whose shutter opening / closing operation section is provided on a side surface parallel to the insertion direction of the disk cartridge, a signal is sent to the disk cartridge of the present embodiment. Can be recorded / reproduced.

  Further, if the shutter 21 and the second opening / closing operation unit 96 are integrally formed, the number of parts constituting the disk cartridge can be reduced. As a result, the manufacturing cost of the disk cartridge can be reduced and the manufacturing process can be simplified.

  In the sixteenth to eighteenth embodiments, the second opening / closing operation unit is provided on the left side surface with respect to the disc cartridge insertion direction. However, the place where the second opening / closing operation part is formed is not limited to the side surface shown in the above embodiment. For example, it may be provided on the right side surface (10r shown in FIG. 88) with respect to the disc insertion direction. Alternatively, the second opening / closing operation unit may be provided on the back surface (10t shown in FIG. 88) of the disk cartridge. In this case, for example, in the case of the belt-like second opening / closing operation unit 96 described in the eighteenth embodiment, the second opening / closing operation unit can be provided on the back surface of the disk cartridge without significant changes. it can.

(Nineteenth embodiment)
The disc cartridge 319 according to the nineteenth embodiment of the present invention will be described below with reference to FIGS. In the disk cartridge 319 of the present embodiment, the same components as those of the disk cartridge 313 of the thirteenth embodiment are denoted by the same reference numerals.

  A characteristic feature of the disk cartridge 319 of the present embodiment is that a rotation preventing member 97 is provided in each of the disk holding portions 21b, 22a and 22b. Further, a recess 89 for ultrasonically welding the nonwoven fabric to the shutters 21 and 22 is provided.

  Specifically, holes 21q, 22r, and 22q are provided in the disk holding portions 21b, 22a, and 22b, and a rotation preventing member 97 is embedded in each of the holes 21q, 22q, and 22r. As shown in FIG. 103, the rotation preventing member 97 partially protrudes from each inclined surface 21b ′ (22a ′, 22b ′) at the disk holding portion 21b (22a, 22b), and the disk 100 holds the disk. When held by the portions 21 a, 21 b, 22 a, 22 b, the rotation prevention member 97 comes into contact with the outer periphery of the disk 100. The anti-rotation member 97 is preferably made of a material having elasticity and a large friction coefficient. For example, the anti-rotation member 97 made of rubber is preferably used.

  Further, if the rotation preventing member 97 is provided in at least one of the disk holding portions 21a, 21b, 22a, and 22b, the rotation preventing effect is exhibited. However, in order to prevent the rotation of the disk 100 more reliably, it is preferable to provide the three anti-rotation members 97 as shown.

  According to this structure, when the disc 100 is held by the disc holding portions 21a, 21b, 22a, and 22b, even if the operator intentionally rotates the disc 100, the rotation preventing member 97 that contacts the disc 100 is used. The disk 100 cannot be rotated with a little force due to the action of. Therefore, even if the operator tries to rotate the disk 100 while intentionally pressing the disk 100 against the shutters 21 and 22, for example, the disk 100 is prevented from rotating. Accordingly, when hard dust is caught between the nonwoven fabrics provided on the shutters 21 and 22, it is possible to prevent the disk from being damaged by the above-described operation of the operator.

  Further, by providing the rotation preventing member 97, it is possible to prevent the disk 100 from rattling in the disk holding portion.

  As shown in FIG. 102, the shutters 21 and 22 are provided with a recess 89 for ultrasonically welding a nonwoven fabric on the contact surface of the disk 10 with the signal recording surface. In FIG. 102, the recess 89 is provided so as to surround the outer periphery of the portion of the shutters 21 and 22 that contacts the signal recording surface. It is also provided in a region inside the recess 89 surrounding the outer periphery. The formation region of the concave portion 89 is not limited to the shape shown in FIG. 102, and may be any as long as the nonwoven fabric can be reliably attached to the shutters 21 and 22. In this recess 89, the nonwoven fabric and the shutters 21 and 22 are ultrasonically welded. Even when a hardened portion of the nonwoven fabric by ultrasonic welding or a protruding portion from the nonwoven fabric of the resin material constituting the shutters 21 and 22 is generated by providing the concave portion 89, the hardened portion or the protruding portion is accommodated in the concave portion 89. Avoid touching the disc. This can prevent the disc from being damaged. In the first to eighteenth embodiments, the recess 89 is preferably formed in the shutter when a nonwoven fabric is provided.

(20th embodiment)
The twentieth embodiment of the disk cartridge according to the present invention will be described below.

  First, the outline of the structure of the disk cartridge 320 will be described with reference to FIG. The disc cartridge 320 includes a cartridge lower body 11, a cartridge upper body 12, a first shutter 21, a second shutter 22, a drop-off prevention member 23, a shield member 24, and a rotation member 25. These members are preferably formed of synthetic resin or the like. In addition, these members do not need to be formed using the same material, and an optimum material for each member is determined in consideration of strength, appearance, and the like required for each member.

  The cartridge lower body 11 has an inner lower surface 11u as shown in FIG. A chucking opening 11c opened so that a chucking member such as a spindle motor for rotating the disk 100 from the outside can enter, and a head for recording and / or reproducing a signal (information) enter the inner lower surface 11u. In addition, a head opening 11 h that is open so that the disk 100 can be accessed is provided. The head opening 11h and the chucking opening 11c communicate with each other. The head opening portion 11h is provided so as to reach the side surface of the cartridge lower body 11, and an opening 11r is provided on a side surface adjacent to the side surface provided with the head opening portion 11h.

  As will be described in detail below, the inner lower surface 11u is provided with grooves 11e and 11f that receive the tips of the convex portions 25e and 25f provided on the rotating member 25. It is preferable that the grooves 11e and 11f do not penetrate the inner lower surface 11u. Further, a rotation hole 39 for receiving rotation shafts 37 and 38 provided in the first shutter 21 and the second shutter 11 respectively is provided in the inner lower surface 11u. It is preferable that the rotation hole 39 does not penetrate the inner lower surface 11u. Further, in the present embodiment, the first shutter 21 and the second shutter 22 are provided with the rotation shafts 37 and 38 and the cartridge lower body is provided with the rotation hole 39. However, the first shutter 21 and the second shutter are provided. A rotation hole may be provided in 22 and a rotation shaft may be provided in the cartridge lower body 11.

  The cartridge upper body 12 has a circular disk opening 12w that opens the entire projection area of the disk 100, and the disk opening 12w is defined by a cylindrical side surface 12i. The disk 100 can be set in the cartridge through the disk opening 12w. A part of the side surface 12i is provided with a notch 12g.

  A notch 12j is provided in the upper surface 12d of the cartridge body 12. The notch 12j engages with the dropout prevention member 23. Although not shown in the drawing, the drop-off prevention member 23 and the cartridge upper surface 12d are fitted like protrusions and recesses to be fitted to each other so that the drop-off prevention member 23 is not easily detached from the cartridge upper body 12. Is provided. When the dropout prevention member 23 is mounted on the cartridge upper body 12, a part of the dropout prevention member 23 projects to the disk opening 12w. In the present embodiment, in order to make the cartridge main body as thin as possible, a notch 12j for completely removing a part of the cartridge upper surface 12d is provided. However, when it may be somewhat thicker than the disk cartridge of this embodiment, a notch that forms a recess in the cartridge upper surface 12d may be provided, and a drop-off prevention member corresponding to the notch may be disposed. . For example, the cutout and dropout prevention member 23 provided in the disk cartridge 308 of the eighth embodiment may be employed in the disk cartridge of this embodiment.

  Further, the upper surface 12d of the cartridge upper body 12 is formed with a drop-off preventing member 12s that is formed integrally with the upper surface 12d and projects to the opening 12w. The dropout prevention members 12s and 23 prevent the disc 100 from dropping out of the disc opening 12w. In particular, when the disk cartridge is used by being inserted vertically into the drive device, the effect of preventing the drop cartridge is exhibited. When the disk is taken out from the disk cartridge, the drop prevention member 23 and the cartridge upper body 12 are disengaged, the drop prevention member 23 is removed from the cartridge upper body 12, and the disk 100 is lifted from the vicinity of the notch 12j, for example. The number of dropout prevention members may be three or more. Further, a dropout prevention member having another shape may be provided, and the place where the dropout prevention member is provided may be a place other than that shown in FIG.

  The cartridge upper body 12 and the cartridge lower body 11 are bonded or welded at the outer edge, or are joined using a connecting member such as a screw to constitute a cartridge main body. Further, the inner lower surface 11 u of the cartridge lower body 11 and the side surface 12 i of the cartridge upper body 12 constitute a disk storage portion for storing the disk 100.

  In the disk storage unit, the space defined by the side surface 12i is larger than the disk 100 to the extent that the disk 100 does not come into contact with the disk 100, and the disk 100 can rotate in the storage unit. The upper part of the disk storage part is opened as a disk opening 12w, and the entire first surface 100A of the disk 100 set in the disk storage part is exposed to the outside from the disk opening 12w. On the other hand, the second surface 100A, which is the information recording surface of the disc 100, faces the inner lower surface 11u.

  By adopting such a structure, the cartridge 320 can be made thinner than in the case of forming a conventional cartridge that covers both sides of the disk. Further, since the label surface of the disc can be exposed from the disc opening 12w, it is easy to check the contents of the disc written on the label surface (first surface) 100B. Further, by exposing the design of the label surface, the design of the entire disc cartridge in which the disc is stored becomes excellent.

  The first shutter 21 and the second shutter 22 are provided on the inner lower surface 11u of the cartridge lower body 11, and when the disc 100 is stored in the disc cartridge 320, the signal recording surface (second surface) of the disc 100. It is located between 100A and the inner lower surface 11u. The first shutter 21 and the second shutter 22 have rotation shafts 37 and 38, respectively. The rotation shafts 37 and 38 are inserted into the rotation holes 39 of the cartridge lower body 11. For this reason, the first shutter 21 and the second shutter 22 rotate around the rotation shafts 37 and 38, and open or close the head opening 11h and the chucking opening 11c with respect to the outside. When the first shutter 21 and the second shutter 22 are in the open state, a part of the second surface 100A of the disk 100 is exposed to the outside from the head opening 100h.

  When the first shutter 21 and the second shutter 22 are in the closed state, the first shutter 21 and the first shutter 21 and the hole 20h are formed in a region overlapping the center hole 100h of the disk 100 stored in the disk storage unit. The second shutter 22 is provided with a notch. Convex portions 21 w and 22 w are formed on the peripheral edges of the cutouts of the first shutter 21 and the second shutter 22. When the first shutter 21 and the second shutter 22 are in the closed state, the convex portions 21w and 22w are in close contact with each other to form a convex portion 20w that contacts the entire circumference of the disc 100 near the center hole 100h. As described in detail in the twelfth embodiment, the convex portion 20w prevents dust from entering the signal recording surface 100A side of the disc 100 from the center hole 100h. Projections 35 and 36 are formed on the convex portions 21w and 22w. The upper surfaces of the protrusions 35 and 36 are higher than the upper surfaces of the convex portions 21w and 22w.

  Further, in order to hold the disc 100 in the disc storage portion when the first shutter 21 and the second shutter 22 are in the closed state, the first shutter 21 has a disc holding portion 21b, and the second shutter Reference numeral 22 has disk holding portions 22a and 22b. These disk holding units function in the same manner as the disk holding units described in the eighth to nineteenth embodiments. In the eighth to nineteenth embodiments, the first shutter 21 is also provided with the disk holding portion 21a. However, in the present embodiment, the first shutter 21 has a convex portion 27a instead of the disk holding portion 21a. Is provided. The convex portion 27a prevents the side surface of the disk 100 from being exposed from the chucking opening portion 11h reaching the side surface of the cartridge lower body 11 when the first shutter 21 and the second shutter 22 are in the closed state.

  The first shutter 21 and the second shutter 22 do not abut on a straight line but have a plurality of joint surfaces that are not on a straight line. Specifically, the joining surfaces 21f and 22f are located approximately on the symmetry center line of the disk cartridge 320, but the joining surfaces 21g and 22g are deviated from the symmetry center line by a predetermined angle, here about 15 to 18 degrees. Abuts on a straight line. The effect of such a structure is as described in detail in the thirteenth embodiment. Further, as described in the thirteenth embodiment, the joining surfaces 21g and 22g overlap in the thickness direction of the disk 100.

  As will be described in detail below, the first shutter 21 and the second shutter 22 have guide grooves 27e and 28f that engage with the convex portions 25e and 25f of the rotating member 25, respectively. The guide grooves 27e and 28f pass through the first shutter 21 and the second shutter 22 so that the convex portions 25e and 25f of the rotating member 25 penetrate.

  The rotating member 25 includes a side wall 25i and a disk receiving portion 25a provided at the bottom of the side wall 25i. The side wall 25i has a cylindrical shape having a size and a shape surrounding the side surface of the stored disk 100, and is divided by notches 25d, 25g, and 25h. The disk receiving portion 25a has a flat ring shape, and a notch 25c is provided in a part thereof. When the first shutter 21 and the second shutter 22 are in the open state, the rotating member 25 rotates and the notch 25c overlaps the head opening 11h. A protrusion 25m for moving the shield member 24 is provided in the vicinity of the notch 25d.

  Convex portions 25e and 25f projecting toward the disc lower body 11 are provided on the lower surface of the disc receiving portion 25a. An operation unit 25j that engages with the shutter opening / closing mechanism of the disk drive device is provided outside the side wall 25i. In order to engage with a shutter opening / closing mechanism provided with a gear, a gear may be provided outside the side wall 25i instead of the operation unit 25j.

  The shield member 24 is disposed in the notch 12g portion of the side wall 12i of the cartridge upper body 12. The structure and operation of the shield member will be described in detail below.

  Each component is assembled while maintaining the vertical relationship as shown in FIG. As a result, the first shutter 21 and the second shutter 22 are disposed on the cartridge lower body 11, and the cartridge lower body 11 and the cartridge upper body 12 are joined so that the rotating member 25 is positioned thereon.

  105 shows a plan view of the disk cartridge 320 with the cartridge upper body 12 removed, and FIG. 106 shows a cross section taken along line FF in FIG. The first shutter 21 and the second shutter 22 are in a closed state.

  As shown in FIG. 105, the disk holding part 22a of the second shutter 22 holds the disk 100 at the position of the notch 25d of the rotating member 25. Further, at the positions of the notches 25g and 25h of the rotating member 25, the disk holding part 21b of the first shutter 21 and the disk holding part 22b of the second shutter 22 hold the disk 100, respectively.

  The operating portion 25j of the rotating member 25 is located in an opening 11r provided in the cartridge lower body 11. Further, the protrusions 35 and 36 provided on the first shutter 21 and the second shutter 22 protrude into the center hole 100 h of the disk 100. The rotation center of the rotary member 25 substantially coincides with the center of the disk 100 and is arranged in the disk storage portion so that it can rotate as the center of the rotation axis.

  Further, the rotation shafts 37 and 38 of the first shutter 21 and the second shutter 22 are located below the disk receiving portion 25 a of the rotation member 25. As shown in FIG. 106, since there is almost no gap between the upper surface of the side wall 25i of the rotating member 25 and the upper surface 12d of the cartridge upper body 12, the movement of the rotating member 25 in the vertical direction is restricted. For this reason, when the first shutter 21 and the second shutter 22 rotate, the rotating member 25 effectively prevents the rotating shafts 37 and 38 from floating up from the rotation hole 39 provided in the cartridge lower body 11. Can be prevented.

  As shown in FIG. 106, the upper surface 25k of the disk receiving portion 25a of the rotating member 25 is inclined, so that the disk 100 contacts only the vicinity of the side wall 25i of the upper surface 25K of the disk receiving portion 25. With this structure, even if the ring width of the disk receiving portion 25a is increased in order to ensure the strength of the rotating member 25, the upper surface 25K is in contact with only the vicinity of the outer periphery of the signal recording surface of the disk 100. Thus, the contact between the signal recording area and the disk receiving portion 25a can be prevented. Note that the position of the upper surface of the disk receiving portion 25 in contact with the disk 100 coincides with the positions of the upper surfaces of the convex portions 21 w and 22 w of the first shutter 21 and the second shutter 22.

  Next, disk holding operations and opening / closing operations of the first shutter 21 and the second shutter 22 will be described. FIG. 107 is a plan view showing the arrangement of the first shutter 21, the second shutter 22, and the rotating member 25 in a state where the first shutter 21 and the second shutter 22 are closed, and FIG. The cross section in the GG line of FIG. 107 is shown. FIG. 109 is a plan view showing the arrangement of the first shutter 21, the second shutter 22 and the rotating member 25 in a state where the first shutter 21 and the second shutter 22 are opened. Reference numeral 110 denotes a cross section taken along line HH in FIG. 107 and 109, the disk 100 is indicated by a two-dot chain line.

  When the first shutter 21 and the second shutter 22 are closed, the disk holding portions 21b, 22a, and 22b are notched 25g, 25h provided on the side wall 25i of the rotating member 25, as shown in FIG. 25d protrudes toward the center of the disc 100 and holds the disc 100. As shown in FIG. 108, the disk holding portions 22a and 22b are provided with reverse tapered inclined surfaces 22a ′ and 22b ′, and the inclined surfaces are in contact with the ridge of the first surface 100B of the disk 100. And 22 b press the disk 100 in the direction toward the center of the disk 100 and also press the disk 100 in the direction of the first shutter 21 and the second shutter 22. The disk holding portion 21b (not shown) is also in the same state. Therefore, the vicinity of the outer periphery of the signal recording surface 100A of the disc 100 is in contact with the disc receiving portion 25a. Further, as described in the twelfth embodiment, the convex portions 21w and 22w of the first shutter 21 and the second shutter 22 are in contact with the vicinity of the center hole 100h of the signal recording surface 100B of the disc 100 (not shown). . The signal recording area of the signal recording surface 100A of the disk 100 is blocked from the outside by the disk receiving portion 25a of the rotating member and the convex portions 21w and 22w of the first shutter 21 and the second shutter 22, and the signal recording area is dusty. And dust can be prevented, and the signal recording area can be prevented from being damaged.

  Further, the hole 20 h provided in the first shutter 21 and the second shutter 22 is approximately the same size as the center hole 100 h of the disk 100. For this reason, even if the first shutter 21 and the second shutter 22 are closed and the disk cartridge 320 is left face-down, any part of the signal recording surface 100A of the disk 100 is not limited to the first shutter 21 and the second shutter. The second shutter 22 is not exposed. For this reason, dust and dust can be prevented from accumulating on the signal recording surface 100A of the disc 100.

  In order to open the first shutter 21 and the second shutter 22, the shutter opening / closing mechanism of the disk drive device and the operation unit 25j are engaged, and the operation unit 25j is moved in the direction indicated by the arrow 25A. As a result of this operation, the rotating member 25 starts to rotate in the disk storage portion, and at the same time, the protrusions 25e and 25f also start to rotate about the center of the disk 100 as a rotation axis. Since the protrusions 25e and 25f are engaged with the guide grooves 27e and 28f, as the protrusions 25e and 25f rotate, the protrusions 25e and 25f push the side walls of the guide grooves 27e and 28f while in the guide grooves 27e and 28f. In the direction of arrows 27E and 28F, respectively. When the side walls of the guide grooves 27e and 28f are pushed by the protrusions 25e and 25f, the first shutter 21 and the second shutter 22 start to move in the directions of arrows 21A and 22A around the rotation shafts 37 and 38, respectively. .

  Further, the disk holding portion 21b also starts to move in the direction of the arrow 21A around the rotation shaft 37. The disk holding parts 22a and 22b move in the direction of the arrow 22A. Accordingly, the disk holding portions 21b, 22a and 22b are separated from the disk 100 and release the disk 100.

  With the opening operation of the first shutter 21 and the second shutter 22, the projections 35 and 36 provided on the first shutter 21 and the second shutter 22 also move in the directions of arrows 21A and 22B. At this time, since the disc 100 does not move, the protrusions 35 and 36 come into contact with the non-signal recording area indicated by 100e of the signal recording surface 100A. Since the protrusions 35 and 36 protrude from the protrusions 21w and 22w, the protrusions 21w and 22w are brought out of contact with the signal recording surface 100A when the signal recording surface 100A and the protrusions 35 and 36 come into contact with each other. Accordingly, it is possible to prevent the convex portions 21w and 22w from contacting the signal recording surface 100A, particularly the signal recording area.

  As shown in FIG. 109, when the rotation of the rotary member 25 proceeds, the convex portions 25e and 25f reach the end portions of the guide grooves 27e and 28f. At this time, the first shutter 21 and the second shutter 22 completely open the head opening 11h and the chucking opening 11c, and the first shutter 21 and the second shutter 22 are opened.

  At this time, the notch 25c provided in the disk receiving portion 25a of the rotating member 25 overlaps the head opening 11h, and the disk receiving portion 25a does not protrude from the head opening 11h. For this reason, in a state where the first shutter 21 and the second shutter 22 are completely opened, the head of the disk drive device can be sufficiently close to the disk 100, and access to the disk 100 by the head is prevented. There is no.

  Further, as shown in FIGS. 109 and 110, even when the first shutter 21 and the second shutter 22 are opened, the projections 35 and 36 of the first shutter 21 and the second shutter 22 The disk 100 is in contact with the non-signal recording area 100e of the recording surface 100A. For this reason, it is possible to prevent the projections 35 and 36 from coming into contact with the signal recording area and scratching.

  When the first shutter 21 and the second shutter 22 are closed, the operation opposite to the above operation is performed. As the closing operation of the first shutter 21 and the second shutter 22 proceeds, the disk holding portions 21b, 22a, and 22b come close to the disk 100, and the operation of holding the disk 100 is performed in the eighth to thirteenth embodiments. In this case, the description is omitted here.

  Next, the structure and operation of the shield member 24 will be described. As shown in FIG. 111, the shield member 24 has a side wall part 24d and a pair of rotating shafts 24b provided on the side wall part 24d. A first contact portion 24a is provided at the tip of the side wall portion 24d. Since the first contact portion 24 a needs to contact the outer surface of the disc 100, the first contact portion 24 a is configured by a curved surface having the same radius of curvature as the outer surface of the disc 100. Moreover, the back surface of the side wall part 24d is a second contact part 24f. An arm portion 24c is provided in the vicinity of each rotating shaft 24b, and a third contact portion 24e is provided at the tip thereof.

  As shown in FIG. 112, the shield member 24 is held such that the rotary shaft 24b is positioned between the upper surface 12d of the cartridge body 12 and the side wall 25i of the rotary member 25. As shown by an arrow 24A, the rotary shaft 24b Can swing around the axis. A straight line connecting the centers of the pair of rotating shafts 24b is parallel to the tangent to the disk 100 and is located above the first surface 100B of the disk.

  113 and 114 show cross sections at the end and the center of the shield member 24 when the first shutter 21 and the second shutter 22 are closed. As shown in these drawings, the convex portion 25m provided on the rotating member 25 comes into contact with the second contact portion 24f of the shield member 24, and the first contact portion 24a comes into contact with the outer surface of the disk 100. In this manner, the side wall portion 24d is pressed toward the center of the disk 100. This prevents dust and dirt from entering the signal recording surface 100A of the disc 100 from the notch 25c (FIG. 104) of the disc receiving portion 25a. In this way, the disk receiving portion 25a and the shield member 24 are continuously in contact with the outer periphery of the disk 100, and dust and dust are completely prevented from entering the signal recording surface 100A.

  When the rotary member 25 is rotated to open the first shutter 21 and the second shutter 22, the convex portion 25m of the rotary member 25 moves away from the shield member 24, so that the shield member 24 moves toward the disk 100 side. It will not be energized.

  When the opening of the first shutter 21 and the second shutter 22 proceeds and the rotating member 25 further rotates, the outer surface of the side wall 25i of the rotating member 25 comes into contact with the third contact portion 24e of the shield member 24, and the side wall The portion 24d is urged toward the outside of the disk 100. 115 and 116 show cross sections at the end and the center of the shield member 24 showing this state. As well shown in FIG. 115, the outer surface of the disk 100 is separated from the first contact portion 24 a of the shield member 24. As a result, the disc 100 becomes rotatable in the disc storage portion.

  As described above, the shield member 24 swings in conjunction with the rotating member 25, so that the shield member 24 is in contact with the outer surface of the disk 100 and is separated from the outer surface of the disk 100 so that the disk 100 can rotate. Can take.

  As described above, according to the present embodiment, the label surface 100B of the disc is exposed from the disc cartridge, the design of the entire disc cartridge can be improved, and the disc cartridge can be made thin.

  The first shutter 21 and the second shutter 22 can be opened and closed by rotating the rotating member 25. When the shutter is closed, the disk 100 is securely held by the disk holding portions 21b, 22a, and 22b. can do.

  Further, the disc 100 is held by the disc holding portion 25 a provided on the rotating member 25, the convex portions 21 provided on the first shutter 21 and the second shutter 22, 22 w, and the shield member 24 interlocking with the rotating member 25. In this state, even if the label surface 100B of the disc 100 is exposed, it is ensured that dust or dirt adheres to the signal recording surface 100A of the disc 100 or the signal recording surface 100A is damaged. Can be prevented.

  In the present embodiment, the opening 11r is provided so as to operate the operating portion 25j for rotating the rotating member 25 on the side surface adjacent to the side surface on which the head opening portion is provided, but on the other side surface of the disk cartridge. The operation unit may be operated. Alternatively, a plurality of operation units may be provided. For example, the operation portion 25j of the present embodiment is used as the first operation portion, and a projection or the like serving as the second operation portion is provided on the side wall 25i of the rotating member 25 so that the second operation portion is positioned in the head opening 11h. It may be provided. Alternatively, as shown in FIG. 105, a projection or the like serving as a second operation unit may be provided in the vicinity of the disk holding unit 22a of the second shutter 22 so that the second shutter 22 is directly operated. In this case, the rotation member 25 rotates with the movement of the second shutter 22, and the first shutter 21 moves in conjunction with the rotation member 25.

  In the present embodiment, the shield member 24 is used to prevent dust and the like from entering the signal recording surface 100A of the disc 100 from the cutout portion 25c formed in the disc receiving portion 25a. However, dust that may enter from the cutout portion 25c may be prevented by adopting another structure without using the shield member 24. For example, as schematically shown in FIG. 117, the side wall 12i is continuously provided in the portion of the notch 12g provided in the side wall 12i of the disk cartridge upper body 12, and the notch 12g is blocked. Then, a disk holding portion 22b and a second shutter 22 (not shown) are provided at positions symmetrical with respect to the notch 12g and the center of the disk 100. The disk holding part 22b is movable toward the center of the disk and urged toward the disk center like the disk holding part of the thirteenth embodiment. Like the disc holding portion of the nineteenth embodiment, an elastic material may be provided on a portion of the disc holding portion that contacts the disc, and the disc 100 may be urged toward the center of the disc 100 by elasticity.

  As shown in FIG. 118, when such a disc holding portion 22b is used, the disc holding portion 22b comes into contact with and holds the disc 100, so that the notch 25c on the side wall 12i of the upper body of the cartridge is provided. The outer surface of the disk 100 is pressed. Since the sizes of the disk storage portion and the disk 100 are hardly changed, the curvature radius of the side wall 12i and the curvature radius of the outer surface of the disk 100 are approximately the same. As a result, the outer surface of the disk 100 is in close contact with the side wall 12i of the cartridge upper body 12, and it is possible to prevent dust from entering the signal recording surface of the disk 100 in cooperation with the disk receiving portion 25a.

  According to such a structure, the shield member 24 is not necessary, so that the structure of the disk cartridge can be simplified.

(21st Embodiment)
The twenty-first embodiment of the disk cartridge according to the present invention will be described below.

  FIG. 119 is a perspective view of the disc cartridge 321 in an exploded state. The disc cartridge 321 is different from the disc cartridge 320 (20th embodiment) shown in FIG. 104 in that the shape of the drop-off preventing member 55 is different and that the cartridge lower body 11 is provided with a take-out history hole 11n. Therefore, the disk holding member 55 and the removal history hole 11n will be described in detail below.

  As shown in FIG. 119, the drop-off prevention member 55 is provided close to the side surface opposite to the side surface provided with the head opening 11h of the cartridge main body composed of the cartridge upper body 12 and the cartridge lower body 11. A rotation shaft 55a is provided in the vicinity of one end in the longitudinal direction of the dropout prevention member 55, and a locking portion 55d having a protrusion 55e is provided at the other end in the longitudinal direction.

  The cartridge upper body 12 is provided with a rotation hole 12m that receives the rotation shaft 55a of the drop-off prevention member 55, an opening 12p into which the locking portion 55d is inserted, and a hole 12n that receives the protrusion 55e of the locking portion 55d. . Further, when the drop prevention member 55 is attached to the cartridge body 12, a recess is formed in the region including the rotation hole 12m and the opening 12p so that the upper surface of the drop prevention member 55 is at the same height as the upper surface 12d of the cartridge body 12n. 12k is provided. When the drop-off prevention member 55 projects into the opening 12w and protrudes upward from the disk 100, the protrusion 55e of the locking portion 55d is inserted into the hole 12n, and the drop-off prevention member 55 is fixed.

  The cartridge lower body 11 is provided with an extraction history hole 11n. FIG. 120 shows an enlarged structure near the extraction history hole 11n. The extraction history hole 11n is provided with a lid member 56, and the connecting portion 56a connects the lid member 56 and the side surface of the extraction history hole 11n so that the lid member 56 covers a part of the opening of the extraction history hole 11n. Connected. The lid member 56 is formed in a columnar shape (pin shape), and a protrusion 56b is provided at the tip thereof.

  The center of the take-out history hole 11n coincides with the center of the rotation hole 12m of the cartridge upper body 12 and the center of the rotation shaft 55a of the drop-off prevention member 55. As will be described in detail below, the lid member 56 and the drop-off prevention member 55 are engaged, and when the drop-off prevention member 55 is rotated around the rotation shaft 55a, the lid member 56 is rotated around the shaft 56C. Power works. As a result, the connecting portion 56 is broken, the lid member 56 is detached from the cartridge lower body 11, and the opening of the take-out history hole 11n is completely exposed.

  When the disk cartridge 321 is manufactured, the disk 100 is stored in a disk storage portion defined by the side wall 12 i of the cartridge upper body 12. Thereafter, when the drop prevention member 55 is rotated so as to remove the disc 100 from the disc cartridge 321, the lid member 56 is detached, and the opening of the take-out history hole 11n is exposed. Once the lid member 56 is detached, the opening of the take-out history hole 11n remains exposed even if the drop prevention member 55 is operated to replace the disc 100 with a different type of disc. That is, as long as the takeout history hole 11n is closed with the lid member 56, the disk 100 in the disk cartridge 321 is stored when the disk cartridge 321 is manufactured. Further, when the ejection history hole 11n is open, it indicates that the disk 100 in the disk cartridge 321 may be different from the one stored when the disk cartridge 321 is manufactured.

  The disk drive in which the disk cartridge 321 is mounted detects the open / close state of the take-out history hole 11n, and uses the detection result for recording / reproducing operation control. For example, consider a case where a disc cartridge 321 containing a disc that can be recorded and reproduced according to a predetermined standard is manufactured. The disk drive detects the state of the removal history hole of the inserted disk cartridge 321. When the take-out history hole 11n is closed, the disc drive determines that the disc cartridge contains a disc that can be recorded and reproduced according to a predetermined standard. Immediately, recording or reproduction is performed according to the standard. On the other hand, if the takeout history hole 11n is open, the disc drive determines that the type of disc contained in the disc cartridge is not known. The disk drive first performs an operation of confirming the type of the disk by irradiating the disk with various test signals in order to determine what kind of disk the disk cartridge is. Subsequently, based on the confirmation result, a signal is recorded on the disc under optimum conditions, or the signal is reproduced from the disc.

  Hereinafter, the structure of the drop-off prevention member 55 and the operation of taking out the disk 100 and replacing it with another desk will be described in detail.

  FIG. 121 shows a state in which the drop prevention member 55 protrudes above the disc 100 and prevents the disc 100 from dropping from the opening 12 w of the cartridge upper body 12. In this state, the disk cartridge 321 is stored or inserted into the disk drive. Of the cross section taken along line JJ shown in FIG. 121, FIG. 122 shows the structure in the vicinity of the rotating shaft 55a, and FIG. 123 shows the structure in the vicinity of the locking portion 55d. In addition, FIG. 124 shows a cross-sectional structure taken along the line KK in FIG.

  As shown in FIG. 121, the drop-off prevention member 55 is provided at a position facing the drop-off prevention member 12 s projecting from the cartridge upper body 12 to the disk opening 12. The drop-off prevention member 55 has a side surface 55f that extends along the longitudinal direction of the drop-off prevention member 55 and is recessed in an arch shape.

  As shown in FIG. 122, a cartridge boss 12q is formed with a cylindrical boss 12q, and an inner space of the boss 12q defines a rotation hole 12m. The rotation shaft 55a of the dropout prevention member 55 is inserted into the rotation hole 12m. A protrusion 55c is provided at the tip of the rotation shaft 55a so that the rotation shaft 55a does not come out of the rotation hole 12m. In addition, an inner space having a cross-section with the same opening as the opening of the take-out history hole 11n is provided inside the rotation shaft 55a, and the lid member 56 is accommodated therein. The protrusion 56 b of the lid member 56 is fitted in a recess 55 b provided in the dropout prevention member 55. The center of the rotation shaft 55 a of the dropout prevention member 55 coincides with the rotation shaft 56 </ b> C of the lid member 56. Further, as described above, the lid member 56 and the side surface of the take-out history hole 11n are connected by the connecting portion 56a. The connecting portion 56 a is thinner than the cartridge lower body 11.

  As shown in FIG. 123, the locking portion 55 d provided at the end of the drop-off prevention member 55 is inserted into the opening 12 p of the cartridge upper body 12 and is in contact with the back surface of the cartridge upper body 12. A protrusion 55e is provided at the tip of the locking portion 55d and engages with the hole 12n of the cartridge upper body 12. The thickness of the region 55f is reduced so that a part of the locking portion 55d is elastically deformed when the projection 55e is pushed in the direction of the arrow 55A. Further, steps 55g and 12o that engage with each other are provided on the side surfaces of the locking portion 55d of the drop-off prevention member 55 and the opening 12p of the cartridge upper body 12, and when the drop-off prevention member 55 is rotated, the locking portion 55 is provided. The vicinity is prevented from floating from the cartridge upper body 12.

  When the disk 100 is removed from the disk cartridge 321, as shown in FIGS. 123 and 124, the drop prevention member 55 is moved as shown in FIG. 121 while pushing the projection 55e engaged with the hole 12n of the cartridge upper body 12 in the direction of the arrow 55A. In the direction of arrow 55B. Then, as shown in FIG. 124, the region 55f of the locking portion 55d is elastically deformed, and the locking portion 55d moves while the tip of the protrusion 55e is in contact with the inclined surface 12v provided on the back surface of the cartridge upper body 12. . Since the inclined surface 12v is provided on the back surface of the cartridge upper body 12, the locking portion 55d moves to the position indicated by the broken line in FIG. 124 without applying a large bias along the inclined surface 12v. At this position, the tip of the protrusion 55e is at the same height as the tip of the protrusion 55e when engaged with the hole 12n so that the elastic deformation generated in the region 55f of the locking portion 55d is restored.

  At this time, as shown in FIG. 122, the drop-off prevention member 55 rotates around the center 55C of the rotation shaft 55a in the direction of the arrow 55B. Along with this, a force for rotating the lid member 56 in the direction of the arrow 55B acts around the rotation shaft 56C, the connecting portion 56a is broken, and the lid member 56 is detached.

  FIG. 125 shows a state where the drop prevention member 55 has moved to a position where the disk 100 can be taken out after the drop prevention member 55 has been moved. At this time, as shown in FIG. 124, the locking portion 55d has moved to a position where it comes into contact with the side surface of the cartridge upper body 12. Therefore, the drop prevention member 55 cannot be moved further in the direction of the arrow 55B.

  As shown in FIG. 125, a part of the drop prevention member 55 protrudes into the disk opening 12w. However, by moving the disk 100 toward the drop prevention member 12s, the drop prevention member 55 is located above the disk 100. It can be prevented from protruding. Therefore, for example, a finger can be put into the center hole 100 h of the disk 100, the disk 100 can be lifted from the cartridge upper body 12 in the vicinity of the drop-off prevention member 55, and the disk 100 can be taken out from the disk cartridge 321.

  FIGS. 126 and 127 show the structures in the vicinity of the rotation shaft 55a and the vicinity of the locking portion 55d, respectively, in the section taken along line JJ shown in FIG. As described above, in the process of rotating the dropout prevention member 55, the lid member 56 is detached. For this reason, as shown in FIG. 126, when the movement of the drop-off prevention member 55 is completed, the take-out history hole 11n is completely opened. As shown in FIG. 127, since the protrusion 55e of the locking portion 55d engages with the recess 12r provided in the cartridge upper body 12, the elastic deformation of the region 55f of the locking portion 55d is restored.

  After the disk 100 is taken out and another disk 100 is stored in the disk cartridge 321, the dropout prevention member 55 is moved in the direction opposite to the arrow 55B. When the fall prevention member 55 returns to the position shown in FIG. 121, the protrusion 55e of the locking portion 55d engages with the hole 12n of the cartridge upper body 12, and the fall prevention member 55 is fixed to the cartridge upper body 12.

  When the disk 100 is replaced again, the drop prevention member 55 may be operated in the same manner as described above. However, since the lid member 56 has already been detached, the operation of detaching the lid member 56 with the rotation of the dropout prevention member 55 is not performed.

  According to the present embodiment, the side surface 55f of the dropout prevention member 55 is recessed in an arch shape. For this reason, even if the drop prevention member 55 is not largely rotated, the drop prevention member 55 can be in a state where it does not protrude above the disk 100, and the rotation angle of the drop prevention member 55 is small. The engaging portion 55d can be kept in contact with and engaged with the cartridge upper body 12. For this reason, even when the disk 100 is taken out, the state where both ends of the drop-off prevention member 55 are in contact with the cartridge upper body 12 can be maintained, and the mechanical strength of the drop-off prevention member 55 can be maintained. Therefore, even when the disk cartridge 321 is accidentally dropped when the disk 100 is taken out or the operator operates the drop prevention member 55 with a strong force, the drop prevention member 55 can be prevented from being damaged. it can.

  Further, by rotating the drop-off prevention member 55, the take-out history hole is simultaneously opened. This eliminates the need for the operator to fold the tabs of the history hole as in the prior art.

  In this embodiment, the lid member 56 is formed in a columnar shape, but is connected to the cartridge lower body 11 so as to cover at least a part of the take-out history hole 11n, and is detached in conjunction with the rotation of the drop-off preventing member 55. If it exists, the cover material 56 may be provided with another shape. For example, a lid made up of a claw provided at the opening of the take-out history hole 11n and an auxiliary member provided between the claw-off prevention member 55 and the claw, and which pushes off the claw as the drop-off prevention member 55 rotates. It may be a material.

  In the present embodiment, the drop prevention member 55 is rotated in parallel with the disk 100 so that the disk 100 is prevented from falling off and the disk 100 is taken out. It may be moved in the direction.

  128 and 129 show the drop-off preventing member 57 moving in parallel. The side surface 57f along the longitudinal direction of the dropout prevention member 57 is recessed in an arch shape. FIG. 128 shows a state in which the disc is held, and a part of the drop-off preventing member 57 protrudes above the disc 100. When taking out the disk 100, the drop-off prevention member 57 is moved in the direction of the arrow 57A perpendicular to the longitudinal direction as shown in FIG. It is preferable that the side surface 57 a of the drop-off preventing member 57 is provided with a convex portion or a concave portion that engages with the cartridge upper body 12, so that the drop-off preventing member 57 is not easily detached from the cartridge upper body 12.

  Since the side surface 57f of the drop-off prevention member 57 is also recessed in an arch shape, the drop-off prevention member 57 can be prevented from protruding above the disc 100 by only slightly moving the drop-off prevention member 57. For this reason, the disk 100 can be taken out with most of the drop-off prevention member 57 kept in contact with the cartridge upper body 12, and the mechanical strength of the drop-off prevention member 57 can be prevented from becoming weak when the disk is replaced.

  The drop-off prevention member 58 shown in FIGS. 130 and 131 rotates around the rotation shafts 58a provided at both ends in the longitudinal direction. In this case, it is preferable to bias the drop-off prevention member 58 with a spring or the like so that the drop-off prevention member 58 contacts the cartridge upper body 12 as shown in FIG. The dropout prevention member 58 can rotate to the position shown in FIG. However, since the side surface 58f along the longitudinal direction of the dropout prevention member 58 is recessed in an arch shape, in order to take out the disk 100, it is only necessary to slightly rotate the dropout prevention member 58 from the state shown in FIG. .

  When the drop prevention member 57 and the drop prevention member 58 are provided in the disc cartridge, a mechanism in which the lid member is detached in conjunction with the slide operation of the drop prevention member 57 and the rotation operation of the drop prevention member 58 may be employed. . Alternatively, the lid covering the take-out hole is not interlocked with the drop-off prevention member 57 and the drop-off prevention member 58, and the operator removes the lid material, so that the slide operation of the drop-off prevention member 57 and the rotation of the drop-off prevention member 58 are performed. A mechanism that enables operation may be provided.

(Twenty-second embodiment)
The twenty-second embodiment of the disk cartridge according to the present invention will be described below.

  132 is a plan view of the disk cartridge 322, and FIG. 133 is a cross-sectional view taken along line LL shown in FIG. Similar to the disk cartridge described with reference to FIGS. 117 and 118, the disk cartridge 322 prevents dust that can enter from the notch 25c provided in the disk receiving portion 25a without using a shield member. Although not shown in detail in FIG. 132, the disk cartridge 322 includes the first shutter 21, the second shutter 22, the rotating member 25, and the drop-off preventing member 55 described in the twentieth and twenty-first embodiments. These members have the structure described in the twentieth and twenty-first embodiments.

  In the disk cartridges of the twentieth and twenty-first embodiments shown in FIGS. 104 and 119, the side wall 12i of the cartridge upper body 12 is provided with a notch 12g. The position of the notch 12g corresponds to a region where the notch 25c provided in the disk receiver 25a is located when the first shutter 21 and the second shutter 22 are closed.

  In the disk cartridge 322 of the present embodiment, the side wall 12i is also provided continuously at the notch 12g. Further, as shown in FIG. 134, a side wall 12i ′ is provided at a portion where the disk 100 is in contact with the region corresponding to the notch 12g.

  The side wall 12i has a larger radius of curvature than the disk 100 in order to define the disk opening 12w. On the other hand, the side wall 12i ′ has the same radius of curvature as the disk 100 as shown in FIG. As shown in FIG. 132, the center of the cylinder formed by the side wall 12i coincides with the point C1 that is the center of the disc storage portion. On the other hand, the center of the curved surface of the side wall 12i ′ coincides with the point C2. Point C2 is offset from point C1. Note that the side wall 25i of the rotating member 25 has a cylindrical shape centered on the point C1, which is the center of the disc storage portion, and rotates around the point C1.

  Further, the disk holding unit 22b holds the disk 100 at a position where the center of the disk 100 coincides with the point C2. In FIG. 132, only the disk holding part 22b is shown, but the disk holding parts 21b and 22a (not shown) also cooperate to hold the disk 100 so that the center of the disk 100 coincides with the point C2. At this position, since the disk receiver 25a receives the disk 100 without contacting the information recording surface (back surface) of the disk 100, the position of the disk receiver 25a is also offset from the point C1. The distance between the point C1 and the point C2 depends on the radius of the cylinder formed by the side wall 12i and the radius of the disk 100. When the diameter of the disk 100 is 5 inches, the distance between the points C1 and C2 is preferably in the range of about 0.5 mm to about 1.5 mm. If the distance is smaller than this range, the disc 100 may come into contact with the side wall 12i due to surface deflection of the disc 100 when the disc cartridge 322 is inserted into the disc drive device and the disc 100 is rotated. Further, when the distance between the point C1 and the point C2 is greater than about 1.5 mm, the gap between the disc 100 and the side wall 12i of the disc storage portion becomes too large, and dust or dust accumulated in the gap may increase. Therefore, it is not preferable.

  FIG. 136 shows the vicinity of the disc holding portion 22b in the cross section taken along line LL in FIG. As described in the twentieth embodiment, since the upper surface 15K of the disk receiving portion 25a is inclined, the disk 100 contacts only the vicinity of the side wall 25i (not shown) of the upper surface 15k of the disk receiving portion 25. . In the case of this embodiment, the upper surface 25k of the disc receiving portion 25a is parallel to the cartridge lower body 11 in the vicinity of the side wall 25i, and the first shutter 21 and the second shutter 22 are closed, and the disc holding portion When 21b, 22a, 22b (not shown) holds the disc 100, the disc 100 and the disc receiving portion 25a are in contact with each other at this portion. The inner periphery of the area 25b where the disk receiving portion 25a and the disk 100 are in contact is defined by a line 25n.

  As shown in FIG. 132, the region 25b of the disc receiving portion 25a is located in the vicinity of the outer periphery of the disc 100 except for the portion where the notch 25c is provided. The inner periphery 25n of the region 25b is located on the circumference centered on the point C2. On the other hand, the outer periphery of the area 25 b is defined by the outer periphery of the disk 100. Accordingly, the region 25b is a region obtained by removing a portion overlapping the notch 25c from a ring-shaped region sandwiched between two concentric circles centered on the point C2.

  The first shutter 21 and the second shutter 22 (not shown) are closed, and the disc 100 is held by the disc holding portions 21b, 22a and 22b (not shown) of the first shutter 21 and the second shutter 22. When done, the center of the disc 100 is located at point C2. Further, since the curvature radii of the disk 100 and the side wall 12i ′ are equal, the side surface of the disk 100 is completely in contact with the side surface 12i ′ at the position where the notch 12g is provided. That is, the position of the center of the disk held by the disk holding portions 21b, 22a, and 22b is offset with respect to the center of the disk storage portion so that the outer surface of the disk 100 contacts the side wall 12i ′ to hold the disk. Yes.

  On the other hand, when the first shutter 21 and the second shutter 22 (not shown) are closed, the inner periphery of the region 25b where the disc receiving portion 25a contacts the disc is also offset with respect to the center of the disc storage portion. ing. Thereby, the information recording surface (back surface) of the disc 100 is in contact with the disc receiving portion 25a in the vicinity of the outer periphery thereof, and the side surface of the disc 100 is in close contact with the side wall 12i ′ in the notch 25c without the disc receiving portion 25a.

  On the other hand, in the vicinity of the disc hole 100h, the disc 100 is in contact with the convex portions 21w and 22w provided on the first shutter 21 and the second shutter 22, as described in the twentieth embodiment. Therefore, the information recording area of the disc 100 is completely blocked from the outside, and dust can be prevented from adhering to the information recording area of the disc 100.

  136 and 137, in the disc cartridge 322, a taper 26c is provided at the bottom of the second shutter 22 where the disc holding portion 22b is provided, and the disc holding portion 22b of the cartridge lower body 11 is positioned. A recess 11x is provided in the area to be operated. For this reason, when the thickness and diameter of the disc 100 vary and are slightly larger than the standard value, the second shutter 22 is located in the region 26b located at the end of the recess 11x of the cartridge lower body 11 as shown in FIG. Elastic deformation. For this reason, the inclined portion 22b ′ of the desk holding portion 22b is surely brought into contact with the outer peripheral edge of the disc 100, and the first shutter 21 and the second shutter 22 reliably hold the disc 100 without rattling. Can do. Further, the disk holding portion 22b urges the disk 100 toward the center by elastic deformation. Thereby, as shown in FIGS. 132 and 134, the disk 100 is urged toward the side wall 12i ′, and the close contact of the side surface of the disk 100 with the side wall 12i ′ is increased. And it can prevent more reliably that dust adheres to the information recording area of the disc 100.

  In order to securely hold the disc 100 regardless of variations in the thickness and diameter of the disc 100, as shown in FIG. 137, when the disc 100 having a median thickness and diameter within the standard range is held. Thus, when the second shutter 22 is designed to be slightly elastically deformed and the disc 100 whose thickness and diameter are the lower limit values of the standard values is held, as shown in FIG. You may design so that the shutter 22 hardly elastically deforms.

  Thus, according to the present embodiment, it is possible to prevent dust from adhering to the information recording area of the disk 100 without using the shield member 24. Accordingly, the shield member 24 and the structure for interlocking the shield member with the rotating member 25 are not required, and the structure of the disk cartridge can be simplified.

(23rd embodiment)
The twenty-third embodiment of the disk cartridge according to the present invention will be described below.

  Unlike the conventional disk cartridge, the disk cartridge of the present invention exposes one side of the disk and accommodates the disk. For this reason, the thickness of the disk cartridge can be reduced, and the design of the entire disk cartridge can be made excellent by exposing the design written on the label surface of the disk.

  However, since one side of the disk is exposed, the operator can touch the label of the disk, and depending on the usage pattern of the operator, the label surface may be inadvertently pressed. Even in such a case, the disk cartridge needs to hold the disk so that the signal recording surface of the disk is not damaged or the disk is not deformed. For this reason, an investigation was made as to how the signal recording surface can be surely protected without scratching the signal recording surface of the disc and how to hold the disc.

  FIG. 138 shows that when the disc 100 is held by the holding structure 59 such as a disc receiving portion, the signal recording area 100d does not come into contact with the holding structure 59 and is not damaged even if the disc 100 is pressed by the operator. A space to be provided below the signal recording area 100d is shown. In FIG. 138, the dimensions of a part are exaggerated so that the features of the holding structure 59 that defines the space can be clearly understood. Therefore, the ratio of the vertical and horizontal dimensions in the figure is different from the actual ratio.

  When a sufficient space can be taken below the disk 100, a space corresponding to the maximum amount of bending of the disk 100 may be ensured no matter how the disk 100 bends. However, if such a disk cartridge is manufactured, the thickness will increase. In order to make the space to be provided below the disk as small as possible, it is necessary to hold the disk 100 so that the bending of the disk 100 is minimized. For this purpose, it is preferable to hold the disc 100 as close as possible to the signal recording area 100d. As shown in FIG. 138, the holding structure 59 holds the signal recording surface 100 </ b> A of the disc 100 on the portion from the center of the disc 100 to Rin and on the outer side of Rout from the center of the disc 100. Here, Rin is a distance from a point close to the signal recording area 100d closer to the center of the disk 100 than the signal recording area 100d to the center of the disk 100. Also, Rout is a distance from the point close to the signal recording area 100d outside the signal recording area 100d to the center of the disk 100. As described above, the point defining Rin and the point defining Rout are preferably as close as possible to the signal recording area 100d. When the diameter of the disk 100 is 5 inches (radius 60 mm), it is preferable that Rin is 20 mm and Rout is 59 mm.

  The space 69b to be provided so as not to damage the signal recording area 100d is determined as follows. First, let S be the height (depth) of the space 69b. Then, from a circumference 69d having a radius Rout on the signal recording surface 100A, a circumference 69e having a radius (Rout-1.2S) on a plane parallel to the signal recording surface 100A by a distance 0.3S, and the signal recording surface 100A. A circumference 69f having a radius (Rout-16.2S) on a plane parallel to the distance S is defined. A circle defined by the circumference 69d and the circumference 69e is a side surface 59a of the truncated cone having an upper surface and a lower surface, and a circle frustum is a side surface 59b having a circle defined by the circumference 69e and the circumference 69f as an upper surface and a lower surface. .

  A circle having a radius Rin from the center of the disk 100 is defined as a bottom surface, and a side surface of a cylinder having a height (depth) S from the signal recording surface 100A is defined as 59d. A space 69b to be provided below the signal recording region 100d is a region obtained by removing the region inside the cylinder defined by the side surface 59d from the region of the truncated cone defined by the side surfaces 59a and 59b.

  Since the value of S defines the height of the space 69b, the larger the value of S, the less likely the signal recording area 100d is damaged even if the disk 100 is bent. However, when the value of S is increased, the disk cartridge becomes thick. Therefore, a smaller value of S is better for producing a thin disk cartridge. According to the experimental results, it was found that the signal recording area 100d can be protected even when the value of S is 1 mm, as the bending of the disk 100 caused by the operator pressing the disk 100 by hand.

  On the other hand, it is preferable that the clamp area 100e of the disk 100 does not contact the holding structure 250 in the area on the center side of the disk 100 from Rin. The clamp area 100e is in contact with a turntable or a clamper in a disk drive apparatus for recording / reproducing the disk 100. This is because if this area is scratched or dust is attached, the disk 100 cannot be reliably chucked. The clamp area 100e is defined by an area sandwiched by two concentric circles having diameters of 22 mm and 33 mm that coincide with the center of the disk. Since the clamp area is a small area with respect to the disk 100, even if the operator presses the disk 100 above the clamp area 100e, the disk 100 hardly bends. Therefore, as long as the space 69a in contact with the entire clamp region 100e is formed, the height (depth) of the space 69a may be any value.

  FIG. 139 schematically shows how the disk 100 is deformed when the above-described space 69b is formed with the value of S being 1 mm, and a force for pressing the disk 100 toward the space 69b is applied to the disk 100 arranged on the space 69b. Is shown. From the results of the experiment, it was found that the force with which the operator presses the disc 100 by hand does not exceed 3 kg. Even at this time, the bending of the disk 100 is sufficiently within the space 69b, and the bent disk 100 does not come into contact with the side surfaces 59a and 59b.

  The space 69b defines a minimum necessary area for preventing the signal recording area 100d of the disk 100 from being damaged. Therefore, a larger area including the space 69b may be formed under the signal recording area 100d of the disc 100. As shown in FIGS. 140 and 141, a space 69b may be formed beyond the side surfaces 59a and 59b. However, in order to reinforce the strength of the portion of the holding structure 59 that holds the disc 100 that holds the outer periphery of the disc 100, it is preferable to provide a reinforcing portion 59 ′ or 59 ″ adjacent to the portion that holds the outer periphery. Sides 59a and 59b are useful in determining what shape these reinforcing portions 59 ′ and 59 ″ are allowed to be.

  A disk cartridge designed based on the above examination will be specifically described. 142 is a plan view of the disk cartridge 322, and FIG. 143 is a cross-sectional view taken along line AA in FIG. FIG. 144 is a perspective view showing the disk cartridge 323 in an exploded state. In the disk cartridge 322, the same components as those in the disk cartridges of the twentieth to twenty-second embodiments are denoted by the same reference numerals.

  Similar to the twenty-second embodiment, the disk cartridge 323 does not have a shield member, and holds the disk by bringing the disk 100 into contact with the side wall 12 i of the cartridge upper body 12.

  Specifically, as shown in FIGS. 142 and 144, in a state where the first shutter 21 and the second shutter 22 are closed, the disk cartridge 323 includes the disk holding portion 21b of the first shutter 21 and The disc 100 is held by the disc holding portions 22 a and 22 b of the second shutter 22. At this time, the side surface of the disk 100 is in contact with the side wall 12i of the cartridge upper body 12 in a region where the notch 25c of the rotating member 25 is located. Further, the center of the disk 100 coincides with the point C2. The inner periphery of the area where the disk receiving portion 25a of the rotating member 25 and the disk 100 are in contact with each other so as to be in contact with the first surface 100A of the disk 100 evenly. On the other hand, the center of the side wall 25i of the rotating member 25 coincides with the point C1.

  As shown in FIGS. 142 and 144, in the first shutter 21 and the second shutter 22 of the disc cartridge 323, the convex portion 20w composed of the convex portions 21w and 22w around the hole 20h corresponding to the center hole of the disc 100. Is formed. Furthermore, convex portions 35d and 36d are provided at a position separated from the convex portion 20w by a predetermined distance. The height of the upper surfaces of the convex portions 35d and 36d is equal to the height of the upper surfaces of the convex portions 21w and 22w. The convex portions 35d and 36d become a convex portion 20d that is continuous when the shutter is closed, and holds an area close to the signal recording area of the disc 100. The concave portion formed between the convex portion 20w and the convex portion 20d defines the space 69a, and when the disc 100 is held, the clamp area of the disc 100 is located in the space 69a.

  Further, as shown in FIG. 143, when the disc 100 is held, the convex portion 36d, the first shutter 22 and the rotating member 25 are arranged so that a space 69b shown in FIG. A dish receiving portion 25a is designed. Although not shown in FIG. 143, the convex portion 35d and the first shutter 21 are designed in the same manner. The distance between the first shutter 21 and the second shutter 22 and the disk 100 is designed to be 1 mm or more. Further, the disk receiving portion 25a is located outside the space 69b shown in FIG. That is, it is located below the side surfaces 59a and 59b of the space 69b, and the disk receiving portion 25a does not block the space 69b.

  Thus, by securing the space 69b shown in FIG. 138 below the disc 100, the signal recording area of the disc can be reliably protected even if the operator presses the disc 100 stored in the disc cartridge 323. can do.

  The disk cartridge 323 may correspond to the disk 100 having a so-called “stack ring” in the vicinity of the clamp area 100e ′. As shown in FIG. 138, the stack ring is a protruding ring provided on the signal recording surface 100 </ b> A of the disk 100. The protruding ring 100p has a circular shape formed coaxially with the center hole 100h. The protruding ring 100p prevents the signal recording area 100d from coming into contact with the flat surface when the disc is placed on the flat surface with the signal recording surface 100A facing down. The protruding ring 100p is provided between the clamp region 100e ′ and the center hole 100h, and is separated from the edge of the center hole 100h by 0.1 mm or more. The protruding ring 100p has a width of about 1 mm in the radial direction and a height of 0.05 to 0.5 mm from the surface of the signal recording area 100d. Specifically, in a certain type of disc 100, the diameter of the center hole 100h is 15 mm, and the clamp region 100e ′ is defined between a circle having a diameter of 22 mm and a circle having a diameter of 33 mm. The protruding ring 100p is located in a region defined by a circle having a diameter of 17.5 mm and a circle having a diameter of 22 mm, and has a width of about 1 mm and a height of 0.3 mm or less. The protruding ring may be located between the clamp area 100e ′ and the signal recording area 100d, and may be located within 2 mm from the edge of the clamp area 100e ′.

  In this case, the disc holding portion 21b of the first shutter 21 and the disc holding portions 22a and 22b of the second shutter hold the disc 100 so as not to contact either the clamp region 100e ′ or the protruding ring 100p. Therefore, the space 69a defined by the convex portion 20w and the convex portion 20d is formed in a size that includes the protruding ring 100p. More specifically, when the first and second shutters 21 and 22 are closed, the disk holding portion 21b of the first shutter 21 and the disk holding portions 22a and 22b of the second shutter are connected to the clamp region 100e ′ and An area between the clamp area 100e ′ and the center hole 100h, which is 0.1 mm or more away from the edge of the center hole 100h, or between the clamp area 100e ′ and the clamp area 100e ′ and the signal recording area 100d. The disc 100 is held so as not to contact the region within 2 mm from the edge of the clamp region 100e ′. In the case of the disk 100 of the type described above, the space 69a includes an area defined by a first circle having a diameter of 17.5 mm and a second circle that is 0.1 to 0.3 mm smaller than the first circle. The space 69a may be a continuous area for the clamp area 100e ′ and the protruding ring 100p, or may be composed of separate areas for the clamp area 100e ′ and the protruding ring 100p.

  In addition to this, the disk cartridge 323 of the present embodiment employs a structure that increases the mechanical strength of the constituent members, a structure that can be fitted with two types of drop-off prevention members, and a structure that increases the dust-proof function in order to increase practicality. ing. These structures are described below.

  First, a structure for increasing the mechanical strength of the constituent members will be described. As shown in FIGS. 142 and 144, when the first shutter 21 and the second shutter 22 are closed, the disk holding portions 21a, 22a, and 22b are connected between the first shutter 21 and the disk holding portion 21b. The disk holding portions 21a, 22a, and 22b urge the disk 100 toward the center by the elastic force due to the bending of the connecting portion and the elastic force due to the bending of the connecting portion between the second shutter 22 and the disk holding portions 22a and 22b. The power to do works.

  However, when the disk cartridge 323 is dropped or when the operator tries to move the disk 100 within the cartridge by applying a force to the surface 100B of the disk 100, the disk holding portions 21a, 22a, and 22b are moved to the disk 100. A force that tries to move from the center to the outside may work. When such a force is large, the connection portion between the first and second shutters and the disk holding portions 21a, 22a, and 22b may be damaged. In particular, the connecting portion between the disc holding portion 21b and the first shutter 21 and the connecting portion between the disc holding portion 22b and the second shutter 22 are narrow, and the force shown by arrows 21B and 22B in FIG. weak.

  Therefore, in the disk cartridge 323, the cross sections 65a and 65b of the side wall 12i defining the notches 25g and 25h of the rotating member 25 intersect with the radial direction (arrows 21B and 22B) of the disk 100 and face the disk storage portion 10d. To be formed. Then, when the shutter is closed, the movements of the disk holding portions 21b and 22b are regulated by the cross sections 65a and 65b so that the disk holding portions 21b and 22b do not move in the directions of the arrows 21B and 22B by a predetermined amount or more, respectively. Yes.

  By providing the cross sections 65a and 65b, it is possible to prevent the disk holding portions 21b and 22b from being damaged even if the disk cartridge 323 falls or the operator intentionally moves the disk holding portions 21b and 22b. . Further, when the shutter is closed, even if a force for opening the first shutter and the second shutter is applied for some reason, the shutter tries to move with the movement of the first shutter and the second shutter. The disk holding portions 21b and 22b are in contact with the cross sections 65a and 65b. As a result, the opening operation of the first shutter 21 and the second shutter 22 is hindered. Therefore, rattling of the first shutter 21 and the second shutter 22 can be reduced when the shutter is closed.

  As shown in FIG. 142, when the operator tries to open the first shutter 21 and the second shutter 22, the first shutter 21 and the second shutter 22 open the rotation holes 37 and 38, respectively. In order to rotate about the center, the side wall of the guide groove 27e of the first shutter 21 and the side wall of the guide groove 28f of the second shutter 22 make the convex part 25e and convex part 25f of the rotating member 25 the rotation hole 37. And 38, respectively, to rotate in the directions of arrows 25E and 25F.

  At this time, the space where the guide groove 27e and the guide groove 28f extend to the arrows 25E and 25F, or the convex portion 25e and the convex portion 25f can move in the directions of the arrows 25E and 25F, respectively, is in the guide groove 27e and the guide groove 28f. If it exists, it will cause the 1st shutter 21 and the 2nd shutter to shake.

  For this reason, when the shutter is closed, the end portions of the guide groove 27e and the guide groove 28f where the convex portions 25e and 25f are located are indicated by arrows 25E and 25F (that is, the convex portions 25e and the convex portions 25f and the rotation holes 37). Extending in the directions of arrows 27E and 28F which are substantially orthogonal to the direction connecting the two and 38 respectively.

  As shown in FIG. 144, the cartridge lower body 11 is provided with a convex portion 33b, and the rotating member 25 is provided with a convex portion 25w. Both the convex portion 33 b and the convex portion 25 w have a height substantially equal to the thickness of the first shutter 21 and the second shutter 22. The convex portion 33 b is in contact with the back surface of the disk receiving portion 25 a of the rotating member 25, and the convex portion 25 w is in contact with a concave portion 33 c provided on the inner lower surface 11 u of the cartridge lower body 11. The convex portions 33 b and 25 w hold the rotating member 25 in a region that does not contact the first shutter 21 or the second shutter 22 of the rotating member 25. This prevents the rotating member 25 from being bent and coming out of close contact with the disk 100 in an area where the rotating member 25 is not in contact with the first shutter 21 or the second shutter 22.

  As described in the fourteenth embodiment, the disk holding unit 22a includes the first area 122a and the second area 222a, and the first area 122a is higher than the second area 222a. The tip of the first region 122 a is inserted into a recessed region 12 x provided on the inner upper surface of the cartridge upper body 12. The region 12x is provided along the region through which the tip of the first region 122a passes when the shutter is opened and closed.

  As shown in FIGS. 142 and 144, when the shutter opens and closes, a head opening 11h is provided in an area through which the disk holding portion 22a passes, and the head opening 11h reaches the side surface of the cartridge lower body 11. ing. For this reason, when the cartridge main body is configured by joining the cartridge lower body 11 and the cartridge upper body 12, it is necessary to ensure the strength of the cartridge main body only by the cartridge upper body 12 in the vicinity of the head opening 11h.

  According to the disk cartridge 323, as described in the fourteenth embodiment, when the shutter is closed, the first region 122a of the disk holding portion 22a can securely hold the disk 100. Further, since the second area 222a of the disk holding portion 22a is low, the inner upper surface of the cartridge upper body 12 may not be thinned. As a result, in the region through which the disk holding portion 22a of the cartridge upper body 12 passes, the region where the thickness must be reduced can be reduced, and the strength of the entire cartridge body is reduced in the vicinity of the head opening 11h. Can be prevented.

  Further, as described in the thirteenth embodiment, the disk cartridge 323 of this embodiment employs a structure that increases its rigidity when the shutter is closed.

  As shown in FIGS. 145 and 146, the first shutter 21 and the second shutter 22 have joint portions that are in contact with each other so as to overlap in the thickness direction in two non-continuous regions separated by the hole 20 h. The first shutter 21 has a joint portion 21g ′ and a joint portion 21f ′, and the second shutter 22 has a joint portion 22g ′ and a joint portion 22f ′. A cross-sectional view taken along line NN in FIG. 145 is shown above FIG. 146, and a cross-sectional view taken along line OO in FIG. 145 is shown below FIG. In the contact region between the joint portion 21g ′ of the first shutter 21 and the joint portion 22g ′ of the second shutter 22, when the shutter is closed, the joint portion 21g of the first shutter 21 with respect to the thickness direction of the shutter. 'Is located on the lower side, and the joint portion 22g' of the second shutter 22 is located on the upper side. Further, in the contact area between the joint portion 21f ′ of the first shutter 21 and the joint portion 22f ′ of the second shutter 22, the first shutter 21 is joined in the thickness direction of the shutter when the shutter is closed. The portion 21f ′ is located on the upper side, and the joint portion 22f ′ of the second shutter 22 is located on the lower side.

  Further, a convex portion 38c is provided along the contact area at the tip of the joint portion 21g ′ of the second shutter 22, and a concave portion 37c that engages with the convex portion 38c when the shutter is closed is the first shutter 21. Is provided.

  Further, as shown in FIG. 147, at the portion where the disk holding portion 22a of the second shutter 22 and the convex portion 27a of the first shutter 21 abut, the convex portion 27a is provided with a projection 37a, and the projection 37a. The disc holding portion 22a is provided with a recess 38a that engages with the disc holding portion 22a. A concave portion 37b is provided in an upper portion of the projection 37a. A convex portion 38b that engages with the concave portion 37b is provided in an upper portion of the concave portion 38a. The protrusion 37 a and the concave portion 37 b constitute a third joint portion 37 e of the first shutter 21, and the concave portion 38 a and the convex portion 38 b constitute a third joint portion 38 e of the second shutter 22.

  As described above, in the disk cartridge 323, the portion where the first shutter 21 and the second shutter 22 are in contact with each other is divided into two regions, and the joint portion between the first shutter 21 and the second shutter 22 in each region. Are brought into contact with each other so as to overlap in the thickness direction of the shutter. Furthermore, the vertical relationship of overlap is reversed in the two regions. With this structure, when the first shutter 21 and the second shutter 22 are closed, it is possible to prevent the shutter from being lifted, and the first shutter 21 and the second shutter 22 are closed when the first shutter 21 and the second shutter 22 are closed. The rigidity of the part can be increased.

  Further, when the first shutter 21 and the second shutter 22 are closed by providing the concave portion 37c and the convex portion 38c in the joint portion 21g ′ of the first shutter and the joint portion 22g ′ of the second shutter, respectively. In other words, the joint portion 21g ′ and the joint portion 22g ′ can be prevented from easily separating from each other due to shakiness of the shutter. In addition, this improves the degree of adhesion between the first shutter 21 and the second shutter 22, and can also increase the dust proof around the joint.

  Further, the rigidity of the joint between the first shutter 21 and the second shutter 22 when the shutter is closed by the third joint portion 37e of the first shutter 21 and the third joint portion 38e of the second shutter 22. It is increasing. Further, since the connecting portion 21g ′ and the projection 37b of the first shutter are sandwiched between the convex portion 38b and the joining portion 22g ′ of the second shutter, the joining of the first shutter 21 and the second shutter 22 is performed when the shutter is closed. The rigidity of can be further increased.

  Next, a structure capable of mounting two types of dropout prevention members will be described. As shown in FIG. 144, the disk cartridge 323 has a rotation hole 12m and a hole 12m ′ in the cartridge upper body 12, and as means for preventing the disk 100 from dropping from the disk opening 12w, a drop prevention member 55 and Any of the drop-off prevention members 59 can be attached. The dropout prevention member 55 has the same structure as the dropout prevention member 55 of the disk cartridge 321 described as the twenty-first embodiment. By inserting the rotation shaft 55a into the rotation hole 12m of the cartridge upper body 12 and engaging the rotation shaft 55a, the drop-off prevention member 55 can rotate around the rotation shaft 55a. Then, as described in the twenty-first embodiment, a part of the drop-off prevention member 55 is projected to the disk opening 12w to prevent the disk 100 from dropping off or to the position shown in FIG. The disc 100 can be taken out.

  On the other hand, the drop-off prevention member 59 has a rotating shaft 59a and a protrusion 59b. When attaching to the cartridge upper body 12, the rotation shaft 59a and the protrusion 59b of the drop-off prevention member 59 are engaged with the rotation hole 12m and the hole 12m ′, respectively, and inserted. Since the drop-off prevention member 59 and the cartridge upper body 12 are fixed at two locations, the drop-off prevention member 59 does not move, and a part of the drop-off prevention member 59 always protrudes to the disk opening 12w. That is, when the drop prevention member 59 is attached to the cartridge upper body 12, the disk 100 stored in the disk cartridge 323 cannot be taken out.

  In this way, the cartridge upper body 12 is provided with the pivot hole 12m and the hole 12m ′ that can be engaged with both the drop-off prevention member 55 and the drop-off prevention member 59 as the engagement means, so that the drop-off prevention member 55 can be dropped as necessary. Either the prevention member 55 or the drop-off prevention member 59 can be attached to the cartridge body. Therefore, the disk cartridge 323 from which the disk 100 can be taken out and the disk cartridge 323 from which the disk 100 once stored cannot be taken out by selectively using either the drop-off prevention member 55 or the drop-off prevention member 59. can do.

  In FIG. 144, the take-out history hole 11n and the lid member 56 described in the twenty-first embodiment are not shown, but these may be provided in the disc cartridge 323. When the removal history hole 11n and the lid member 56 are provided in the disk cartridge 323 and the drop prevention member 55 is mounted, the drop prevention member 55 is rotated to take out the disk 100 as described in the twenty-first embodiment. At this time, the lid member 56 falls off. Thereby, the opening of the hysteresis hole 11n is completely exposed. When the drop prevention member 59 is mounted instead of the drop prevention member 55, the disk 100 cannot be taken out by rotating the drop prevention member 55. Therefore, the lid member 56 remains covering the opening of the take-out history hole 11n.

  Next, with reference to FIG. 144, FIG. 145, FIG. 148 and FIG. As shown in FIG. 144, a convex portion 33a is provided around the chucking opening portion 11c and the head opening portion 11h of the cartridge lower body 11. The convex portion 33a is indicated by a broken line in FIG. As shown in FIG. 148, which is a cross-sectional view taken along the line MM of FIG. 145, concave portions 37d and 38d are provided on the back surfaces of the first shutter 21 and the second shutter 22 so as to engage with the convex portion 33a. ing.

  The first shutter 21 and the second shutter 22 move on the cartridge lower body 11. Therefore, dust or the like adhering to the back surfaces of the first shutter 21 and the second shutter 22 is likely to be drawn into the cartridge as the first shutter 21 and the second shutter 22 move. With this structure, dust that enters between the cartridge lower body 11 and the first shutter 21 and the second shutter 22 from the chucking opening 11c and the head opening 11h can be prevented.

  Further, as shown in FIG. 149, in the vicinity of the hole 20h formed by the first shutter 21 and the second shutter 22, the first shutter 21 and the second shutter 22 are in contact with each other. The second shutter 22 is provided with projections 36a and 36b, and the first shutter 21 is provided with recesses 35a and 35b that engage with the projections 36a and 36b. The convex portions 36a and 36b of the first shutter 21 protrude from the joint surface formed by abutting each other when the first shutter 21 and the second shutter 22 are closed. This prevents dust from entering along the contact surfaces of the first shutter 21 and the second shutter 22 from the hole 20h.

  In this embodiment, in order to provide the space 69b shown in FIG. 138 below the disk 100, an example in which a disk receiving portion for holding the disk 100 is provided on the rotating member is shown. However, other structures may be employed to provide the space shown in FIG. 138 below the disk 100. For example, as shown in FIG. 150, the cartridge upper body 12 ′ may be provided with a disk receiving portion 25a ′ for holding the outer peripheral edge of the disk 100. Even in such a structure, by selecting the shapes of the disk receiving portion 25a ′ and the first shutter and the second shutter 22 so that the space 69b shown in FIG. 138 is formed below the disk 100, Even if the disc 100 is pressed by the operator, a disc cartridge can be realized in which the signal recording area does not come into contact with the shutter or the disc receiving portion.

(24th Embodiment)
The disk drive device according to the present invention will be described below.

  FIG. 151 is a perspective view schematically showing the main part of the disk drive device 900. The disk drive device 900 can load any of the disk cartridge 301 of the first embodiment to the disk cartridge 323 of the twenty-third embodiment. FIG. 151 shows a state in which the disk cartridge 323 of the 23rd embodiment is loaded. The disk 100 is indicated by a broken line.

  The disk drive device 900 is a drive unit 902 for rotating the disk 100 housed in the disk cartridge 323, and for recording information on the disk 100 and / or reproducing information from the disk 100. A head 908.

  The driving means 902 includes a spindle motor 904 and a turntable 906 attached to the rotation shaft of the spindle motor 904, and the spindle motor 904 is supported by the base 910. The head 908 moves along the guide 912 by an actuator (not shown).

  In addition, the disk drive device 900 includes a clamper 916 supported by the arm 914. The turntable 906 and the clamper 916 include, for example, a magnet and a magnetic body, respectively. As will be described later, the disk 100 is held between the clamper 916 and the turntable 906 by these suction forces, and the disk 100 is fixed to the turntable 906. As a result, the driving force of the spindle motor 904 is reliably transmitted to the disk 100, and the disk 100 is rotated without causing surface runout.

  The disc cartridge 323 has an operation portion 25j for opening and closing the first shutter 21 and the second shutter 22 on the side surface 10r parallel to the insertion direction 1A of the disc cartridge 323. For this reason, the disk drive device 900 includes a shutter opening / closing mechanism 918 that engages with the operation unit 25j to open and close the shutter in a region close to the side surface 10r of the disk cartridge 323 loaded in the disk drive device 900. Yes. In FIG. 151, the shutter opening / closing mechanism 918 is shown separated from the operation unit 25j in order to clearly show the operation unit 25j. An actuator for moving the shutter opening / closing mechanism 918 is also omitted.

  The shutter opening / closing mechanism 918 is provided corresponding to the position of the shutter opening / closing operation portion of the disk cartridge inserted into the disk drive device 900. For example, when a disk cartridge having a shutter opening / closing operation unit is loaded on the side surface 10p provided with the head opening 11h, like the disk cartridges of the first embodiment and the tenth embodiment, it is close to the side surface 10p. A shutter opening / closing mechanism 918 is provided in the area to be operated. When the disk cartridges of the sixteenth to eighteenth embodiments are mounted in the disk drive device 900, a shutter opening / closing mechanism 918 may be provided close to the side surface 10q.

  Two or more shutter opening / closing mechanisms 918 may be provided in the disk drive device 900. For example, in FIG. 151, a disk opening / closing mechanism 918 is also provided on the side surface 10p of the disk cartridge 323, and a disk drive in which either the disk cartridge of the first embodiment or the disk cartridge 323 of the 23rd embodiment can be loaded. Device 900 may be made.

  The shutter opening / closing mechanism 918 has a structure that engages with the shape and operation of the operation unit 25j provided in the disk cartridge. In the case of the disk cartridge 323, since the first shutter 21 and the second shutter 22 are opened and closed by sliding the operation unit 25j, a shutter opening / closing mechanism that engages with the operation unit 25j and slides in a direction parallel to the arrow 1A. 918 is provided. When the operation portion 25j is formed by a gear or when a disc cartridge having a gear-like operation portion is loaded as in the sixteenth embodiment, the shutter opening / closing mechanism 918 is formed in a gear shape.

  A post 920 that defines the height at which the disk cartridge 323 is held is provided on the base 910, and the disk cartridge 323 is held on the upper surface of the post 920. A positioning pin 922 that engages with a positioning hole 11 w provided in the disk cartridge 323 is provided in the base 910.

  The post 920 and the positioning pin 922 function as a support structure that positions and supports the disk cartridge 323 at a predetermined position with respect to the driving unit 902. Instead of the posts 920 and the positioning pins 922, a tray is provided as a support structure in the disk drive device 900, the tray is ejected, the disk cartridge 323 is placed on the tray, and the tray is housed to accommodate the disk 100 in the disk device 900. The disk cartridge 323 may be positioned at a predetermined position with respect to the drive unit 902 and the head 908. Further, a support structure in which the tray and the positioning pin 922 are used together may be employed.

  The operation of the disk drive device 900 will be described below.

  First, the disk cartridge 323 in which the disk 100 is stored is loaded into the disk drive device 900. The disk cartridge 323 may be mounted manually by an operator, or the disk cartridge 323 may be conveyed from the disk cartridge insertion hole of the disk drive device 900 to the position shown in FIG. 151 by a loading mechanism (not shown). In this case, for example, the concave portion 10c described in the first embodiment and the concave portion 10e of the sixteenth embodiment are provided at a position indicated by an arrow 926 in FIG. 151, and the loading mechanism is engaged with the concave portion 10c or the concave portion 10e. You may let them. A tray may be used as described above. By either method, the disk cartridge 323 is positioned at a predetermined position with respect to the driving unit 902 and the head 908.

  Further, the concave portion 10g described in the first embodiment or the slit 10b of the sixteenth embodiment is provided in the portion indicated by the arrow 928 or arrow 930 of the disk cartridge 323, and the disk drive device 900 is engaged with the concave portion 10g or the slit 10b. A convex portion (not shown) may be provided. By doing so, even if the disk cartridge 323 is to be inserted into the disk drive device 900 in the up-down direction or the front-back direction, the disk cartridge 323 cannot be normally inserted due to interference with each other. Thereby, erroneous insertion can be prevented.

  When the disk cartridge 323 is mounted at the position shown in FIG. 151, the shutter opening / closing mechanism 918 engages with the operation unit 25j and slides the operation unit 25j in the direction opposite to the arrow 1A. Along with this, the first shutter 21 and the second shutter 22 start to open, and the head opening 11h and the chucking opening 11c are opened. In addition, as described in the twentieth embodiment, the shutter opening / closing mechanism 918 causes the disk holding portions 21b, 22a, and 22b to release the holding operation of the disk 100 via the first shutter 21 and the second shutter 22. Therefore, the disk 100 is released from the disk holding portions 21b, 22a, and 22b. Subsequently, the arm 914 holding the clamper 916 is lowered, and the disk 100 is held between the clamper 916 and the turntable 906. As a result, the disk 100 is held on the turntable 906 so as to be rotatable in the storage portion of the disk cartridge 323.

  The disk 100 is rotated by the spindle motor 904. Then, the head 908 accesses the information recording area of the disk 100 to record information on the disk 100 and reproduce information recorded on the disk 100.

  When ejecting (unloading) the disk cartridge 323 from the disk drive device 900, first, the arm 914 is raised and the clamper 916 is detached from the disk 100. Subsequently, the shutter opening / closing mechanism 918 is moved in the direction of the arrow 1A, and the operation unit 25j is slid. Along with this, the first shutter 21 and the second shutter 22 are closed. When the first shutter 21 and the second shutter 22 are closed, the disk holding unit grips the disk 100, and when the first shutter 21 and the second shutter 22 are completely closed, the disk holding unit blocks the disk 100. Hold. Thereafter, the disk cartridge 323 is ejected from the disk drive device 900 by an unloading mechanism (not shown).

  In FIG. 151, the disk drive device 900 holds the disk cartridge 323 horizontally. However, as described in the first embodiment and the eighth embodiment, the disk drive device 900 may be configured to hold the disk cartridge vertically. Even when the disk cartridge is loaded vertically into the disk drive device 900, the drop prevention member can prevent the disk 100 from dropping from the disk storage portion.

  In the above first to 23rd embodiments, the form in which the nonwoven fabric is attached to the shutter by ultrasonic waves or the like has been described. However, a structure that is hard to be scratched by forming a tough hard coat or the like on the information recording surface of the disk. When the disc is provided, a non-woven fabric is not necessarily required, and the shutter may directly contact the disc. The entire surface of the shutter does not need to be in surface contact with the information recording surface of the disc, and the shutter may have a structure in which at least a part of the shutter is in contact with the information recording surface of the disc. That is, not the entire surface of the shutter but a part of the shutter may be in surface contact with the disk. Moreover, you may provide the structure which prevents a damage | wound, such as a nonwoven fabric, in the surface contact part.

  In the first to twenty-fourth embodiments, the disc 100 housed in the disc cartridge has an information recording surface only on one side. This is because the disk cartridge of the present invention has a structure in which one side of the disk is exposed to the outside, and a disk having an information recording surface only on one side is illustrated as an example of a disk optimal for such a structure. Only. For example, even a disc having information recording surfaces on both sides can be appropriately stored in the disc cartridge of the present invention and loaded into the disc device to record and reproduce information. However, when a disc having an information recording surface on both sides is stored and stored in the disc cartridge of the present invention, dust may adhere to the exposed information recording surface. It is preferable to provide a mechanism.

  In the first to twenty-fourth embodiments, the size of the disc 100 is not particularly mentioned. However, the present embodiment is a disc cartridge that accommodates discs of various sizes such as a 12 cm disc and other size discs. The invention can be implemented.

  Further, in the first to twenty-fourth embodiments, the outer shape of the disk cartridge is shown to be slightly larger than the disk, but the size of the disk and the disk cartridge is in the relationship shown in the figure. It is not limited. For example, the outer shape of the disc cartridge is large enough to accommodate a 12 cm disc, but the disc storage portion and disc holding portion provided on the disc cartridge may be of a size and structure suitable for accommodating an 8 cm disc. Good. Such a disk cartridge also functions as an adapter for recording / reproducing with respect to an 8 cm disk in a 12 cm disk recording / reproducing apparatus, for example.

  The features described in each of the first to twenty-fourth embodiments can be implemented in appropriate combination. For example, the rotation preventing member described in the nineteenth embodiment may be provided in the disk cartridge of the sixteenth embodiment. Further, various recesses for collecting dust described in the fifteenth embodiment may be provided in the disc cartridge of the sixteenth embodiment. As described above, since there are a wide variety of combinations of the first to twenty-fourth embodiments, it is impossible to list all possible combinations of examples. However, it is possible for those skilled in the art to implement such combinations of various possible embodiments based on the present specification, and such combinations of various possible embodiments are also included in the scope of the present invention.

  The disc cartridge of the present invention is particularly suitable for storing a disc having a recording surface only on one side. By providing a structure in which the cartridge body covers only the signal recording surface of the disk and exposes one surface, the thickness of the cartridge can be reduced. Further, by making the shutter cover only one side of the disk cartridge, the structure can be simplified and the cost of the shutter can be reduced. In addition, since the disk holding unit or the disk holding member presses and holds the disk against the shutter or the cartridge main body, it is possible to prevent the disk from rattling within the cartridge main body and to prevent dust and the like from attaching to the signal recording surface of the disk. . In addition, the design is superior by using the disc label surface exposed at the disc opening.

  Therefore, according to the present invention, there is provided a disc cartridge that is thin, highly dustproof, excellent in design, and usable in various drive devices.

1 is a perspective view showing an overall structure of a disk cartridge in a first embodiment of the present invention. It is the perspective view which looked at the disk cartridge of FIG. 1 from the bottom. FIG. 2 is an exploded perspective view showing a state where the disk cartridge of FIG. 1 is disassembled. FIG. 2 is a cross-sectional view showing the vicinity of a disk holding member of the disk cartridge of FIG. 1. FIG. 2 is a cross-sectional view showing the vicinity of a disk holding member of the disk cartridge of FIG. 1. FIG. 2 is a perspective view showing a state where the shutter is opened and a positioning pin is inserted in the disk cartridge of FIG. 1. It is sectional drawing which shows the disc holding member vicinity in FIG. It is a perspective view which shows the disc holding member vicinity in FIG. It is a top view which shows the whole structure of the disc cartridge in the 2nd Embodiment of this invention. FIG. 10 is a plan view showing a state in which the disc is released in the disc cartridge of FIG. 9. It is a top view which shows the whole structure of the disc cartridge in the 3rd Embodiment of this invention. FIG. 12 is a plan view showing a state in which the disc is released in the disc cartridge of FIG. 11. It is a top view which shows the whole structure of the disc cartridge in the 4th Embodiment of this invention. FIG. 14 is a plan view showing a state in which the disc is released in the disc cartridge of FIG. 13. It is a top view which shows the whole structure in the state which the shutter of the disc cartridge in the 5th Embodiment of this invention closed. FIG. 16 is a cross-sectional view of a disk holding member in the disk cartridge of FIG. 15. FIG. 16 is a plan view showing the overall structure of the disk cartridge shown in FIG. 15 with the shutter opened. FIG. 18 is a cross-sectional view of a disk holding member in the disk cartridge of FIG. 17. It is a top view which shows the whole structure in the state which the shutter of the disc cartridge in the 6th Embodiment 6 of this invention closed. FIG. 20 is a plan view showing the entire structure of the disk cartridge of FIG. 19 in a state where the shutter is opened. It is a top view which shows the whole structure in the state which the shutter of the disc cartridge in the 7th Embodiment of this invention closed. It is a top view which shows the whole structure in the state which open | released the shutter of the disc cartridge of FIG. It is a perspective view which shows the whole structure of the disc cartridge in 8th Embodiment. FIG. 24 is an exploded perspective view showing a state where the disk cartridge of FIG. 23 is disassembled. FIG. 24 is a perspective view showing a state in which the shutter is closed when there is no cartridge upper body and no disk in the disk cartridge of FIG. 23. FIG. 24 is a perspective view showing a state in which the shutter is opened in the case where there is no cartridge upper body and the disk in the disk cartridge of FIG. 23. FIG. 24 is a perspective view showing a state in which the shutter is closed when there is no disk in the disk cartridge of FIG. 23. FIG. 24 is a perspective view showing a state in which the shutter is opened when there is no disc in the disc cartridge of FIG. 23. FIG. 24 is a partial cross-sectional view showing a cross section passing through the center of the disk of the disk cartridge of FIG. 23. FIG. 24 is a cross-sectional view showing a part of the shutter of the disk cartridge of FIG. 23. FIG. 24 is a partial plan view showing the vicinity of the operation unit of the disk cartridge of FIG. 23. FIG. 24 is a perspective view showing a drop prevention member of the disk cartridge of FIG. 23. FIG. 24 is a front view of the disk cartridge of FIG. 23 viewed from the drive insertion direction. It is a perspective view which shows the whole structure of the disc cartridge in the 9th Embodiment of this invention. FIG. 35 is an exploded perspective view showing a state where the disk cartridge of FIG. 34 is disassembled. FIG. 35 is a perspective view showing a state where the shutter is closed when there is no disk in the disk cartridge of FIG. FIG. 35 is a perspective view showing a state in which the shutter is opened when there is no disk in the disk cartridge of FIG. 34. FIG. 35 is a partial cross-sectional view of the disk cartridge of FIG. 34 passing through the center of the disk and showing a state where the shutter is closed. FIG. 35 is a partial cross-sectional view of the disk cartridge of FIG. 34 passing through the center of the disk and showing a state in which the shutter is open. FIG. 35 is a cross-sectional view showing a state in the vicinity of the outer periphery of the disk passing through the disk center of the disk cartridge in FIG. 34 and showing a state where the shutter is closed. FIG. 35 is a cross-sectional view of the vicinity of the outer periphery of the disk passing through the center of the disk of the disk cartridge of FIG. 34 and showing a state in which the shutter is opened. It is a perspective view which shows the whole structure of the disc cartridge in the 10th Embodiment of this invention. FIG. 43 is an exploded perspective view showing a state where the disk cartridge of FIG. 42 is disassembled. FIG. 43 is a perspective view showing a state where the shutter is closed when there is no disk in the disk cartridge of FIG. FIG. 43 is a perspective view showing a state in which the shutter is opened when there is no disk in the disk cartridge of FIG. FIG. 43 is a partial cross-sectional view showing a state where the shutter is closed, which is a cross section passing through the center of the disk of the disk cartridge of FIG. 42. FIG. 43 is a partial cross-sectional view showing a state where the shutter is opened, which is a cross section passing through the center of the disk of the disk cartridge of FIG. 42. FIG. 44 is a cross-sectional view of the vicinity of the outer periphery of the disk passing through the center of the disk of the disk cartridge of FIG. 42 and showing a state where the shutter is closed. FIG. 44 is a cross-sectional view of the vicinity of the outer periphery of the disk passing through the center of the disk of the disk cartridge of FIG. 42 and showing a state where the shutter is opened. It is a perspective view which shows the whole structure of the disc cartridge in the 11th Embodiment of this invention. FIG. 52 is an exploded perspective view showing a state where the disk cartridge in FIG. 50 is disassembled. In the disk cartridge of FIG. 50, it is a perspective view which shows the state which has closed the shutter when there is no disk. In the disk cartridge of FIG. 50, it is a perspective view which shows the state which has opened the shutter when there is no disk. FIG. 51 is a partial cross-sectional view showing a state where the shutter is closed, which is a cross section passing through the center of the disk of the disk cartridge of FIG. 50. FIG. 52 is a partial cross-sectional view of the disk cartridge of FIG. 50 passing through the center of the disk and showing a state where the shutter is open. FIG. 52 is a cross-sectional view showing a part of the shutter of the disk cartridge of FIG. 50. FIG. 52 is a partial plan view showing the vicinity of an operation unit of the disk cartridge of FIG. 50. In the disc cartridge of 12th Embodiment of this invention, it is a perspective view which shows the state which has closed the shutter when there is no disc. FIG. 59 is a partial cross-sectional view of the disk cartridge of FIG. 58 passing through the center of the disk and showing a state where the shutter is closed. FIG. 59 is a perspective view showing a state in which the shutter is opened when there is no disk in the disk cartridge of FIG. 58. FIG. 59 is a partial cross-sectional view of the disk cartridge of FIG. 58 passing through the center of the disk and showing a state where the shutter is open. FIG. 59 is a perspective view showing a modified example of the disk cartridge of FIG. 58 and showing a state where the shutter is closed when there is no disk. FIG. 62 is a perspective view showing the state of the disc cartridge of FIG. 61 with the shutter open when there is no disc. It is a perspective view which shows the whole structure of the disc cartridge in the 13th Embodiment of this invention. FIG. 65 is an exploded perspective view showing a state where the disk cartridge of FIG. 64 is disassembled. FIG. 65 is a schematic plan view showing a state in which the shutter of the disk cartridge of FIG. 64 is closed. FIG. 65 is a schematic plan view showing a state in which the shutter of the disk cartridge of FIG. 64 is opened. It is a detailed perspective view of a shutter lock part. It is a detailed sectional view of a disk holding part of a shutter. It is sectional drawing which shows the joint surface shape of two shutters. It is sectional drawing which shows the joint surface shape of two shutters. It is a perspective view which shows the whole structure of the disc cartridge in the 14th Embodiment of this invention. FIG. 73 is a perspective view of a shutter of the disk cartridge of FIG. 72. FIG. 73 is an enlarged perspective view of the vicinity of a disk holding portion of the disk cartridge of FIG. 72. FIG. 73 is an enlarged perspective view of the vicinity of a disk holding portion of the disk cartridge of FIG. 72. FIG. 73 is an enlarged cross-sectional view of the vicinity of a disk holding portion of the disk cartridge of FIG. 72. FIG. 73 is a schematic plan view showing a state in which the shutter is closed in the disk cartridge of FIG. 72. FIG. 73 is a schematic plan view showing a state in which the shutter is opened in the disk cartridge of FIG. 72. FIG. 79 is a sectional view taken along line BB in FIG. 78. It is CC sectional drawing in FIG. It is AA sectional drawing in FIG. It is sectional drawing which shows the modification of a disk receiving part. It is a disassembled perspective view which shows the state which the disc cartridge in the 15th Embodiment of this invention decomposed | disassembled. FIG. 84 is a schematic plan view showing a state in which the shutter is closed in the disk cartridge of FIG. 83. FIG. 84 is a schematic plan view showing a state in which the shutter is opened in the disk cartridge of FIG. 83. It is DD sectional drawing in FIG. It is EE sectional drawing in FIG. It is a perspective view which shows the whole structure of the disc cartridge in the 16th Embodiment of this invention. FIG. 89 is an exploded perspective view showing a state where the disk cartridge of FIG. 88 is disassembled. FIG. 89 is a schematic plan view showing a state where the shutter is closed in the disk cartridge of FIG. 88. FIG. 89 is a schematic plan view showing a state in which the shutter is opened in the disk cartridge of FIG. 88. FIG. 90 is a schematic plan view showing a modified example of the disk cartridge of FIG. 88 and showing a state in which the shutter of the disk cartridge is closed. FIG. 92 is a schematic plan view showing a state in which the shutter is opened in the disk cartridge of FIG. 92. It is a perspective view which shows the whole structure of the disc cartridge in the 17th Embodiment of this invention. FIG. 95 is an exploded perspective view showing a state where the disk cartridge of FIG. 94 is disassembled. FIG. 95 is a schematic plan view showing a state where the shutter is closed in the disk cartridge of FIG. 94. FIG. 95 is a schematic plan view showing a state in which the shutter is opened in the disk cartridge of FIG. 94. It is a perspective view which shows the whole structure of the disc cartridge in the 18th Embodiment of this invention. FIG. 99 is an exploded perspective view showing a state where the disk cartridge of FIG. 98 is disassembled. FIG. 99 is a schematic plan view showing a state in which the shutter is closed in the disk cartridge of FIG. 98. FIG. 99 is a schematic plan view showing a state in which the shutter is opened in the disk cartridge of FIG. 98. It is a disassembled perspective view which shows the state which decomposed | disassembled the disc cartridge in the 19th Embodiment of this invention. FIG. 110 is an enlarged cross-sectional view of the vicinity of a disk holding portion of the disk cartridge of FIG. 102. It is a disassembled perspective view which shows the state which the disc cartridge in the 20th Embodiment of this invention decomposed | disassembled. FIG. 105 is a plan view of the disk cartridge shown in FIG. 104 with the cartridge upper body removed. It is the FF sectional view taken on the line in FIG. FIG. 105 is a plan view showing the shutter and the rotating member in a state where the shutter of the disk cartridge shown in FIG. 104 is closed. It is the GG sectional view taken on the line in FIG. FIG. 105 is a plan view showing the shutter and the rotating member in a state where the shutter of the disk cartridge shown in FIG. 104 is opened. It is the HH sectional view taken on the line in FIG. FIG. 105 is a perspective view showing a shield member of the disk cartridge shown in FIG. 104. FIG. 112 is a cross-sectional view showing a state where the shield member shown in FIG. 111 is supported by the cartridge upper body. It is sectional drawing which shows the structure in the shield member edge part in the state which closed the shutter. It is sectional drawing which shows the structure in the center of the shield member in the state which the shutter closed. It is sectional drawing which shows the structure in the shield member edge part in the state which opened the shutter. It is sectional drawing which shows the structure in the shield member center in the state where the shutter opened. FIG. 105 is a schematic plan view for explaining a modified example of the disk cartridge shown in FIG. 104. FIG. 105 is a schematic plan view for explaining a modified example of the disk cartridge shown in FIG. 104. It is a disassembled perspective view which shows the disassembled state of the disc cartridge in the 21st Embodiment of this invention. FIG. 119 is an enlarged view showing the vicinity of the removal history hole of the disk cartridge shown in FIG. 119; FIG. 119 is a plan view of the disc cartridge shown in FIG. 119. FIG. 119 is a view showing the vicinity of the rotation axis in the cross-sectional view along the line JJ in FIG. 119. FIG. 119 is a diagram showing the vicinity of a locking portion in the cross-sectional view along the line JJ in FIG. 119. FIG. 119 is a sectional view taken along line KK in FIG. 119. 119 is a plan view showing a state where the drop-off preventing member is released in the disk cartridge shown in FIG. 119; FIG. It is a figure which shows the rotating shaft vicinity of the JJ sectional view of FIG. It is a figure which shows the latching | locking part vicinity of the JJ sectional view taken on the line of FIG. FIG. 119 is a schematic partial plan view for explaining a modified example of the disk cartridge shown in FIG. 119. FIG. 119 is a schematic partial plan view for explaining a modified example of the disk cartridge shown in FIG. 119. FIG. 119 is a schematic partial plan view for explaining another modified example of the disk cartridge shown in FIG. 119. FIG. 119 is a schematic partial plan view for explaining another modification of the disk cartridge shown in FIG. 119. It is a top view which shows the disc cartridge in the 22nd Embodiment of this invention. It is the LL sectional view taken on the line of FIG. It is a figure which expands and shows a part of LL sectional view taken on the line of FIG. It is a schematic diagram which expands and shows a part of FIG. It is a figure which expands and shows another part of LL sectional view taken on the line of FIG. It is a figure which expands and shows another part of LL sectional view taken on the line of FIG. It is a figure explaining the space provided in the downward direction of a disc in the disc cartridge in the 23rd embodiment of the present invention. It is a figure explaining the bending of a disk. It is a figure which shows the example of the space provided under the disk. It is a figure which shows the other example of the space provided in the downward direction of a disk. It is a top view which shows the disc cartridge in the 23rd Embodiment of this invention. It is the sectional view on the AA line of FIG. FIG. 142 is an exploded perspective view showing a state where the disk cartridge shown in FIG. 142 is disassembled. FIG. 142 is a plan view showing the disk cartridge of FIG. 142. It is a figure which shows the NN sectional view of FIG. It is a figure which shows the OO line cross section of FIG. FIG. 142 is an enlarged perspective view showing a part of the first shutter and the second shutter of the disk cartridge shown in FIG. 142. It is a figure which shows the MM sectional view of FIG. FIG. 142 is an enlarged perspective view showing a part of the first shutter and the second shutter of the disk cartridge shown in FIG. 142. FIG. 145 is a cross-sectional view for explaining another modification of the disk cartridge shown in FIG. 145. It is a perspective view which shows the principal part of the disc drive apparatus in the 24th Embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 11 Cartridge lower body 11c Chucking opening part 11h Head opening part 11e, 11f Guide groove 12 Cartridge upper body 12s Falling prevention member 21 1st shutter 22 2nd shutter 21b, 22a, 22b Disc holding part 21w, 22w Protrusion part 23, 34, 55, 59 Drop-off prevention member 24 Shield member 25 Rotating member 25a Disc receiving portion 25c, 25d, 25g, 25h Notch 25p Groove 27e, 28f Groove 37, 38 Rotating shaft 56 Lid material 100 Disc 320, 321, 322, 323 Disc cartridge

Claims (6)

A disc storage portion that has a disc opening and a bottom, and stores the disc having the first and second surfaces in a rotatable state and so as to expose the first surface to the outside from the disc opening. A chucking opening provided at the bottom of the disk storage unit for chucking the disk from the outside, and a head for recording and / or reproducing signals to access the second surface of the disk A cartridge main body including a head opening provided at the bottom of the disk storage portion,
First and second shutters provided on the bottom of the disk storage portion for opening or closing the head opening to the outside, and the first and second shutters in the disk storage portion A rotating member that is held on the shutter and rotates in accordance with opening and closing of the first and second shutters;
With
The rotating member contacts the outer peripheral edge of the second surface of the disc when the first and second shutters are closed, and receives the disc and the first and second discs. Having a notch provided in the receiving portion so as to be positioned at the head opening when the shutter is open.
The disc storage portion has a side wall provided along the outer periphery of the bottom portion,
When the first and second shutters are in a closed state, the first and second shutters are arranged on the side wall of the disk storage portion in the region where the notch of the rotating member is located. A disk cartridge having a disk holding portion that holds the center of the disk offset with respect to the center of the disk storage portion so that side surfaces abut.   2. The inner periphery of a region where the disc receiving portion of the rotating member and the second surface of the disc contact each other is on a circumference centered at a position offset with respect to the center of the disc storage portion. Disc cartridge as described.   2. The disc cartridge according to claim 1, wherein when the first and second shutters are in a closed state, the center of the disc coincides with the center of the circumference.   2. The disc cartridge according to claim 1, wherein when the first and second shutters are in a closed state, a distance between the center of the disc and the center of the disc storage portion is about 0.5 to 1.5 mm. .   The disk cartridge according to claim 3, wherein a portion of the side wall of the disk storage portion with which the outer surface of the disk abuts has a radius of curvature substantially equal to the radius of curvature of the disk.   4. The disc cartridge according to claim 3, wherein a portion of the side wall of the disc storage portion where the outer surface of the disc does not contact has a radius of curvature larger than the radius of curvature of the disc.

Images