JP2005129129A - Disc cartridge - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent contamination of a disk, when a disk-shape recording medium made high in density is handled as a bare disk. <P>SOLUTION: This cartridge is provided with a cartridge body 4 in which an optical disk 6 is housed and a disk insertion and ejection opening 7, through which the housed optical disk 6 is inserted and ejected, is formed at one side plane being an insertion end for the disk drive device 30; a disk holder 5 which holds the optical disk housed in the cartridge body 4 and can be moved in the direction of insertion and ejection of the optical disk 6, and when it is moved to the disk insertion and ejection opening 7 side in the cartridge body 4; and at least one part of the held optical disk 6 is made to face the outside from the disk insertion and ejection opening 7, wherein the disk holder 5 has a pair of elastic displacement pieces 23a, 23b holding an outer peripheral part of the optical disk 6 between them in the width direction, and the cart ridge body 4 has guide projection parts 17, 18, 19, 20 for making the optical disk 6 be displaced elastically in the direction of holding between them pressing the pair of elastic displacement pieces 23a, 23b, when the disk holder 5 is moved to the side opposite to the disk insertion and ejection opening 7. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a disc cartridge in which a disc-shaped recording medium capable of recording information signals such as image signals and audio signals is held by a disc holder in a cartridge body.

  Among optical disks that are widely used as recording media, there are bare disks that are handled as a single optical disk, such as compact disks and digital versatile disks. In this type of optical disk, a user takes out a single optical disk from a storage case, and the taken-out optical disk is loaded into a disk drive device to record and reproduce information signals.

  In addition, optical discs that have higher density than compact discs and digital versatile discs, can record high-quality image signals and video signals, and can record high-quality audio signals for a long time. The pitch and the like are also very narrow, the spot diameter of the irradiated light beam is extremely small, and the distance between the optical pickup and the objective lens is very close. Therefore, if the surface of the optical disk is minutely scratched or has dust or the like attached thereto, the information signal cannot be recorded accurately or the recorded information signal cannot be read out accurately. Therefore, an optical disk with a high density is used in a state of being stored in a disk cartridge and protected.

  On the other hand, electric devices equipped with a disk drive device such as a digital video camera have been downsized to improve portability, and accordingly, the recording medium used in the disk drive device needs to be downsized. is there.

  In a disk drive device that uses a disk cartridge that rotatably stores an optical disk as a recording medium, a transport mechanism that draws the disk cartridge into the disk drive device is required, and it is difficult to reduce the size of the disk drive device. In addition, even in the case of a disk drive device that uses a single optical disk as a recording medium, a transport mechanism such as a disk holder is required if the optical disk is transported into the disk drive device while being held by a disk holder such as a disk tray. Therefore, downsizing becomes difficult.

  That is, in order to prevent dust and the like from adhering to a high-density optical disc, it is necessary to use it in a disc cartridge. On the other hand, when a disc cartridge containing a rotatable optical disc is used as a recording medium Therefore, it is difficult to reduce the size of the disk drive device. A disk drive device is most easily miniaturized when it is used to transport a single optical disk into the device.

  In addition, there exist the following patent documents 1-5 as literature relevant to this invention.

  The disk cartridges of Patent Document 1, Patent Document 2 and Patent Document 3 are those in which a disk holder for holding a disk is housed in the cartridge body, and the disk holder holding the disk is pulled out to a recording / reproducing position. Information signals are recorded and reproduced. These disc cartridges are loaded into the disc drive device, and further, the disc holder is pulled into the recording / reproducing position to record / reproduce the disc. Therefore, the disc drive device is miniaturized like the bare disc disc drive device. I can't.

  In the disk cartridge of Patent Document 4, an optical disk is stored in the cartridge body, and after the disk cartridge is once loaded in the disk drive device, the optical disk is left in the disk drive device and only the cartridge body is pulled out of the disk drive device. Has been described. Accordingly, the disk cartridge of Patent Document 4 is also drawn into the disk drive device, and the disk drive device cannot be reduced in size.

  The disc cartridge disclosed in Patent Document 5 holds the optical disc exposed. Therefore, dust or the like adheres to the optical disc, and there is a risk of scratches and the like, which makes it difficult to apply to a disc with a high density. In addition, since this disk cartridge is also loaded into the disk drive device, it is difficult to reduce the size of the disk drive device.

Japanese Patent No. 3373030 JP 2000-260151 A Japanese Patent Laid-Open No. 6-168666 JP-A-6-131840 Japanese Unexamined Patent Publication No. 7-320359

  The present invention has been made in view of the above problems, and an object of the present invention is to reduce the overall size and the disk drive by loading only a disk-shaped recording medium into the disk drive device. An object of the present invention is to provide a novel disk cartridge capable of reducing the size of the apparatus and preventing the disk-shaped recording medium from being soiled.

  Another object of the present invention is to provide a disc cartridge capable of handling a disc-shaped recording medium with high density as a bare disc.

  A disc cartridge according to the present invention accommodates a disc-shaped recording medium, and a cartridge main body formed on one side surface where a disc insertion / removal port for inserting / removing the accommodated disc-shaped recording medium becomes an insertion end to the disc drive device; The disc-shaped recording medium stored in the cartridge main body is held and can be moved in the insertion / removal direction of the disc-shaped recording medium. When the cartridge main body moves to the disc insertion / removal side, at least one of the held disc-shaped recording media And a disk holder that allows the portion to face the disk insertion / removal opening. The disc holder has an elastic displacement portion that sandwiches the outer peripheral portion of the disc-shaped recording medium, and the cartridge body presses the elastic displacement portion when the disc holder moves to the side opposite to the disc insertion / removal port. A pressing portion that elastically displaces the disc-shaped recording medium in a sandwiching direction.

  According to the present invention, when the disk holding body moves to the disk insertion / removal opening side in the cartridge body, at least a part of the held disk-shaped recording medium is exposed to the outside from the disk insertion / removal opening. Since the single unit is brought into a state in which the disk drive device can be transported, the disk-shaped recording medium can be handled like a conventional bare disk. Therefore, it is possible to use a disk-shaped recording medium on which high-density recording is performed as the recording medium, and it is possible to reduce the size of the disk drive device. The disc holder has an elastic displacement portion that sandwiches the outer peripheral portion of the disc-shaped recording medium, and when the pressing portion of the cartridge body moves to the side opposite to the disc insertion / removal port, the elastic displacement portion is By elastically displacing the disc-shaped recording medium while being pressed, the disc-shaped recording medium can be reliably held. Therefore, it is possible to prevent the disc-shaped recording medium from being loosened by an external impact or the like, and to prevent the disc-shaped recording medium housed in the cartridge body from being damaged.

  A disk cartridge to which the present invention is applied will be described below with reference to the drawings.

  As shown in FIGS. 1 to 3, a disk cartridge 1 to which the present invention is applied holds a cartridge main body 4 formed by joining a pair of upper and lower halves 2 and 3 and an optical disk 6 serving as a recording medium and a cartridge. And a disc holder 5 movably accommodated in the main body 4.

  An optical disc 6 used in the disc cartridge 1 has a center hole 6a formed at the center, an inner peripheral non-signal recording area 6b is formed around the center hole 6a, and an outer periphery of the inner peripheral non-signal recording area 6b. A signal recording area 6c is formed on the side, and an outer peripheral non-signal recording area 6d is formed on the outer peripheral side of the signal recording area 6c. In this optical disk 6, a reflective film is applied to a light-transmitting synthetic resin substrate such as polycarbonate, a recording layer using a phase change material or an organic dye is further provided, and a protective layer is further formed on the recording layer. The recording medium is a recording medium on which information signals are recorded or reproduced by irradiating a light beam from the disk substrate side with the disk substrate side as a signal recording surface. Note that a recording medium in which a reflective film and a recording layer are provided on a disk substrate, a light-transmitting cover layer is provided on the recording layer, and the cover layer side is a signal recording surface may be used. Such an optical disk 6 includes various types of high-quality image video signals, high-quality sound signals, computer-processed processing data, computer programs, and the like with higher density than existing optical disks such as compact disks and digital versatile disks. The information signal is recorded. The recording medium to be used may be a magnetic disk, a magneto-optical disk or the like in addition to the optical disk 6.

  The upper and lower halves 2 and 3 constituting the cartridge body 4 for protecting the optical disk 6 as described above are formed by injection molding a synthetic resin having mechanical strength, and the whole is formed in a substantially rectangular shape. The substantially rectangular upper and lower halves 2 and 3 have a short side in the direction orthogonal to the insertion direction into the disk drive device and a long side in the insertion direction into the disk drive device. By making the insertion direction into the disk drive device a long side, the user can easily recognize the insertion direction into the disk drive device. It should be noted that the size of the cartridge body 4 may be at least as large as the optical disc 6 is substantially inscribed.

  The upper and lower halves 2 and 3 have peripheral walls 13 and 14 formed around the substantially rectangular main surface portions 11 and 12. The inner sides of the peripheral walls 13 and 14 serve as storage units for the disc holder 5 and the optical disc 6. Concave portions 7a and 7b constituting the disk insertion / removal port 7 are formed in the front walls 13a and 14a that are the insertion ends of the peripheral walls 13 and 14 into the disk drive device. The recesses 7 a and 7 b constitute a substantially rectangular disk insertion / removal port 7 on the front surface of the cartridge body 4 when the peripheral walls 13 and 14 of the upper and lower halves 2 and 3 are brought into contact with each other. The disc insertion / removal opening is formed so that the long side is substantially the same as the diameter of the optical disc 6 and the short side is substantially the same as the thickness of the optical disc 6 in order to minimize the entry of foreign matter such as dust into the cartridge body 4. It is formed to be the same. The disk insertion / removal port 7 may be provided with an open / close lid to prevent dust and the like from entering the cartridge body 4.

  The opposite side walls 13b, 13c, 14b, and 14c parallel to the insertion direction to the disk drive device constituting the peripheral walls 13 and 14 of the upper and lower halves 2 and 3 move in the cartridge body 4 in the insertion direction to the disk drive device. It functions as a guide wall for the disc holder 5 to be operated. Further, the front walls 13a and 14a function as stopper walls when the disk holder 5 moving in the cartridge body 4 moves to the front side, and the back walls 13d and 14d move the disk holder 5 to the back side. It functions as a stopper wall. The rear walls 13d and 14d are formed with protrusions 15 against which the disc holder 5 is abutted.

  On one side wall 13b, 14b of the upper and lower halves 2, 3, recesses 16a, 16b are formed that are notched between the front side and the back side over the movable range of the disc holder 5. The three concave portions 16a and 16b constitute a guide groove 16 that allows the moving operation portion of the disc holder 5 to face the outside when the upper and lower halves 2 and 3 are abutted.

  On the inner side of the side walls 14b and 14c of the lower half 3, a pair of guide projections 17 and 18 that are one step higher than the main surface portion 12 are formed so as to protrude from the rear side end portion to the front side middle portion. . The pair of guide protrusions 17 and 18 have horizontal surface portions 17a and 18a whose upper surface portions are flattened. On the other hand, inside the side walls 13b and 13c of the upper half 3, as shown in FIG. 4, a pair of guide protrusions 19 and 20 that are one step higher than the main surface portion 11 are provided in the middle of the front side from the rear side end portions. It protrudes over the part. The pair of guide protrusions 19 and 20 includes a horizontal surface portion 19a and 20a whose upper surface portion is flattened from an end portion on the back side toward the front surface side, and an end portion on the front surface side of the horizontal surface portions 19a and 20a. And inclined surface portions 19b and 20b inclined toward the main surface portion 11 on the side.

  These guide protrusions 17, 18, 19, and 20 guide the disk holder 5 that moves in the cartridge body 4 in the insertion direction into the disk drive device in the thickness direction when the upper and lower halves 2 and 3 are brought into contact with each other. It functions as a pressing portion that presses a pair of elastic displacement pieces 23a and 23b described later.

  The cartridge main body 4 configured in this way is not loaded into the disk drive device, but only the optical disk 6 held by the disk holder 5 is loaded into the disk drive device. Therefore, the cartridge main body 4 is driven by a disk table that constitutes a recording / reproducing opening and a disk rotation driving unit for rotating the optical disk 6 like a cartridge main body for storing an optical disk of an existing disk cartridge. No opening or the like is formed, and the formed opening is only the disk insertion / removal opening 7 formed on the front surface. By minimizing the opening, foreign matter such as dust can be removed with a simple configuration. It makes it hard to penetrate as much as possible.

  As shown in FIG. 5, the disk holder 5 housed in the cartridge body 4 as described above has a long side substantially the same as the width of the cartridge body 4 and a short side extending from the front surface to the back surface of the cartridge body 4. It is formed in about half of. On the front side of the disk holder 5, a substantially semicircular disk holder 21 corresponding to an approximately half area of the main surface of the optical disk 6 is cut out. On the inner peripheral surface of the disc holding portion 21, a groove portion 22 with which the outer peripheral portion of the optical disc 6 is engaged is formed in the circumferential direction. The groove portion 22 guides the optical disc 6 fitted inside the disc holding portion 21 to the back side of the cartridge body 4 and restricts the optical disc held by the disc holding portion 21 from moving in the thickness direction.

  The disc holder 5 has a pair of elastic displacement pieces 23 a and 23 b that sandwich the outer peripheral portion of the optical disc 6 in the thickness direction at both ends of the groove portion 22. The pair of elastic displacement pieces 23 a and 23 b are continuous with the groove portion 22 between them, and can be elastically displaced in the direction of sandwiching the outer peripheral portion of the optical disc 6 engaged with the groove portion 22. Further, the elastic displacement piece 23b that is in contact with the outer peripheral non-signal recording area 6d of the optical disc 6 has a shape branched from the front side toward the back side along the groove portion 22, and is opposed to the elastic member 23b. The shape is more easily elastically displaced than the displacement piece 23a. The pair of elastic displacement pieces 23a and 23b hold or release the optical disk 6 (to be described later) while elastically displacing the optical disk 6 as the disk holder 5 moves in the cartridge body 4. Will do.

  Further, the portion of the optical disk 6 that protrudes from the disk holding portion 21 is exposed to the outside of the cartridge body 4 from the disk insertion / removal opening 7 when the disk holding body 5 moves inside the cartridge body 4 toward the disk insertion / removal opening 7. Become.

  On one side wall parallel to the moving direction of the disk holder 5 in the cartridge main body 4, a moving operation unit 24 is formed so as to face the outside from the guide groove 16 of the cartridge main body 4. The movement operation unit 24 exposed to the outside from the guide groove 16 is operated by a user, for example, and the disk holding body 5 is moved from the back side to the front side in the cartridge body 4 or from the front side to the back side. It is for moving.

  By the way, in the disk drive device 30 of the disk cartridge 1, as shown in FIG. 6, an opening 32 is formed on the front surface of the device main body 31 so that the front surface of the cartridge main body 4 is engaged. The opening 32 is formed to have approximately the same size as the front surface of the cartridge body 4. The entire cartridge body 4 is not inserted through the opening 32 but is formed so that the front side of the cartridge body 4 can be inserted slightly. The front surface of the cartridge body 4 is engaged with the opening 32. In this state, the optical disk 6 held by the disk holder 5 in the cartridge main body 4 can be inserted into the disk drive device 30, and the optical disk 6 loaded in the disk drive device 30 is inserted into the cartridge. The disc holder 5 in the main body 4 can be held. That is, the optical disk 6 is transferred between the disk cartridge 1 and the disk drive device 30 in a sealed space where the cartridge body 4 is engaged with the opening 32 and the inside of the cartridge body 4 and the inside of the device body 31 are continuous. Will be done.

  A recording / reproducing unit 33 for recording and reproducing the optical disc 6 is formed in the apparatus main body 31. The recording / reproducing unit 33 includes a rotation driving unit 34 that rotates the optical disc 6 and an optical pickup 35 that irradiates the optical disc 6 with a light beam and detects a return light beam reflected. The rotation drive unit 34 includes a disk table 34 a that engages with the center hole 6 a of the optical disk 6. When the disk table 34 a is engaged with the center hole 6 a of the optical disk 6, the optical disk 6 is rotated integrally. Further, the optical pickup 35 records an information signal on the optical disc 6 by irradiating a light beam over the inner and outer circumferences of the signal recording area 6 c of the optical disc 6 and detecting a returning light beam, or records the information signal on the optical disc 6. The information signal recorded in is reproduced.

  Although not shown, a transport mechanism for transporting the optical disk 6 is provided between the opening 32 provided on the front surface of the apparatus main body 31 and the recording / reproducing section 33. This transport mechanism has a pair of rotating rollers that come into contact with the outer peripheral surface of the optical disc 6, and transports the optical disc 6 between the opening 32 and the recording / reproducing unit 33. In addition, as a transport mechanism, the outer peripheral side non-signal recording area 6d of the optical disc 6 may be sandwiched and transported between the opening 32 and the recording / reproducing unit 33.

  Next, an operation until the optical disk 6 stored in the disk cartridge 1 is conveyed to the recording / reproducing unit 33 of the disk drive device 30 will be described.

  As shown in FIG. 7, when the disc cartridge 1 is not in use, the disc holder 5 is moved to the back side of the cartridge body 4, that is, to the first position moved in the direction of the arrow D in FIG. The optical disk 6 is completely stored in the cartridge body 4 to prevent the optical disk 6 from being soiled. Further, the moving operation unit 24 of the disk holder 5 housed in the cartridge body 4 is located on the back side of the guide groove 16. Thereby, the user can visually recognize that the optical disk 6 is accommodated therein.

  When the disc holder 5 is positioned on the back side of the cartridge body 4, the optical disc 6 is held by the disc holder 21 while the outer peripheral portion of the optical disc 6 is sandwiched in the thickness direction by the pair of elastic displacement portions 23 a and 23 b. doing. Specifically, as shown in FIG. 8, the pair of elastic displacement pieces 23 a and 23 b are arranged horizontally between the horizontal surface portions 19 a and 20 a of the upper half 2 side guide protrusions 19 and 20 and the lower half 3 side guide protrusions 17 and 18. While being pressed between the surface portions 17a and 18a, it is elastically displaced in a direction approaching each other, and the outer peripheral portion of the optical disc 6 is sandwiched in the thickness direction. Thereby, the optical disk 6 can be firmly held by the disk holding part 21.

  As shown in FIG. 6, the disk cartridge 1 is engaged with the opening 32 of the disk drive device 30 with the front surface of the cartridge body 4 as the insertion end. That is, the disk insertion / removal port 7 of the cartridge body 4 is connected to the opening 32 of the disk drive device 30. When the moving operation portion 24 of the disc holder 5 located on the back side of the cartridge body 4 in the guide groove 16 is slid in the direction of arrow D in FIG. Moves to the second position shown in FIG. 9 while being guided by the side walls 13b, 13c, 14b, 14d. When the disk holder 5 moves in the cartridge body 4 from the first position on the back side to the second position on the front side, a part of the optical disk 6 held by the disk holder 5, for example, about half of the area is Then, it is exposed to the outside of the cartridge body 4 from the disk insertion / removal opening 7 and enters the opening 32 of the apparatus body 31. Note that the protrusion amount A of the optical disk 6 from the disk insertion / removal opening 7 is set so that the transport mechanism on the disk drive device 30 side can transport the optical disk 6.

  Further, when the disc holder 5 moves in the cartridge body 4 from the first position on the back side to the second position on the front side, the pressure on the pair of elastic displacement pieces 23a and 23b is released as shown in FIG. Then, the pair of elastic displacement pieces 23a and 23b are elastically restored in a direction away from each other. This facilitates the movement of the optical disk 6 held by the disk holding portion 21 toward the disk insertion / removal port 7.

  Then, the optical disk 6 exposed to the outside of the cartridge body 4 is transported to the recording / reproducing unit 33 in the apparatus main body 31 by the transport mechanism on the disk drive device 30 side, as shown in FIG. When the cartridge body 4 is transported from the inside of the cartridge body 4 to the recording / reproducing unit 33 of the disk drive device 30, the front surface of the cartridge body 4 in which the disk insertion / removal opening 7 is formed is engaged with the opening 32 of the device body 31. And the inside of the apparatus main body 31 constitute a sealed space portion, so that the optical disk 6 can be prevented from being soiled.

  The optical disk 6 is mounted on the disk table 34a of the recording / reproducing unit 33, rotated integrally with the disk table, and the light beam emitted from the optical pickup 35 extends over the inner and outer circumferences of the signal recording area 6c of the optical disk 6. The return of the reflected and reflected light is detected by the optical pickup, whereby the information signal is written to the optical disc 6 and the information signal recorded on the optical disc 6 is read. As described above, when recording or reproduction of the optical disk 6 is performed, the optical disk 6 is conveyed alone to the recording / reproducing unit 33 and is handled as a bare disk like a conventional compact disk or digital versatile disk.

  When the optical disk 6 is loaded in the disk drive device 30, the cartridge body 4 in which the optical disk 6 is empty may be engaged with the opening 32, and may be removed from the opening 32. May be. Even when the disc holder 1 is removed from the opening 32, the disc holding body 5 of the disc cartridge 1 is held on the front side of the cartridge main body 4, so that the moving operation portion 24 can move the guide groove 16. The user continues to be positioned on the front side, and the user can determine whether or not the optical disc 6 is present in the cartridge main body 4 by visually recognizing the position of the moving operation unit 24.

  When the recorded or reproduced optical disk 6 is taken out from the disk drive device 30, first, as shown in FIG. 11, the front surface of the cartridge body 4 is engaged with the opening portion 32 of the device body 31, and the opening portion 32 and the disk insertion are inserted. The outlet 7 is made continuous.

  The optical disk 6 in the recording / reproducing unit 33 is conveyed from the recording / reproducing unit 33 to the opening 32 by the conveyance mechanism, and the optical disk 6 conveyed to the opening 32 is inserted into the cartridge main body 4 from the disk insertion / removal opening 7 of the cartridge main body 4. 4, and further held by a disk holder 5 located on the front side of the cartridge body 4.

  Then, the user moves the moving operation unit 24 facing outside from the guide groove 16 of the cartridge body 4 from the front side to the back side of the cartridge body 4, so that the disk holding body 5 holding the optical disk 6 is also provided. It is moved in the direction opposite to arrow D in FIG. As a result, the optical disk 6 held on the disk holder 5 is completely stored in the cartridge body 4. Further, the disk holder 5 is positioned again on the back side of the cartridge main body 4 so that the pair of elastic displacement portions 23a and 23b sandwich the outer peripheral portion of the optical disc 6 in the thickness direction. As a result, the disk holding portion 21 is firmly held. Thereafter, the cartridge body 4 is removed from the opening 32 of the apparatus body 31.

  In the disk cartridge 1 configured as described above, since only the optical disk 6 is inserted into the disk drive apparatus 30 and the cartridge body 4 and the disk holder 5 are not inserted, the disk drive apparatus 30 can be reduced in size. can do. Further, the optical disk 6 is transferred to and from the disk drive device 30 by engaging the front surface side of the cartridge body 4 with the opening 32 of the disk drive device 30 and the opening 32 and the disk insertion / removal port 7 are connected. 4 and the inside of the apparatus main body 31 are performed after forming a continuous sealed space, so that the optical disk 6 can be prevented from being soiled.

  Further, in this disc cartridge 1, when a pair of elastic displacement portions 23a and 23b sandwich the outer peripheral portion of the optical disc 6 held by the disc holding portion 21 in the thickness direction, it receives an impact or vibration from the outside. Even if it exists, generation | occurrence | production of the rattling of the optical disk 6 hold | maintained at this disk holder 5 can be prevented, and it can prevent that the optical disk 6 accommodated in the cartridge main body 4 is damaged.

  Next, another disk cartridge 50 to which the present invention shown in FIG. 12 is applied will be described.

  The disc cartridge 50 has a configuration substantially similar to that of the disc cartridge 1 except that the disc holder 5 described above sandwiches the outer periphery of the optical disc 6 in the radial direction. Accordingly, in the following description, the same parts as those of the disk cartridge 1 are not described, and the same reference numerals are given in the drawings.

  In this disk cartridge 50, the disk holder 5 has a long side substantially the same as the width of the cartridge main body 4 and a short side formed to be approximately half the depth from the front surface to the back surface of the cartridge main body 4. On the front side of the disk holder 5, a substantially semicircular disk holding part 51 corresponding to an approximately half area of the main surface part of the optical disk 6 is cut out.

  The disc holding unit 51 holds the optical disc 6 by sandwiching the outer peripheral portion of the optical disc 6 in the radial direction. Specifically, the disc holding portion 51 constitutes an elastic displacement portion that can be elastically displaced in a direction in which both end portions 51a and 51b sandwiching the outer peripheral portion of the optical disc 6 fitted inside thereof are close to or away from each other. A plurality of abutting protrusions 52 that abut on the outer peripheral surface of the optical disc 6 are formed on the inner peripheral surface of the disc holding portion 51 so as to protrude inward. The plurality of contact protrusions 52 are arranged at both end portions 51a and 51b of the disc holding portion 51a and an intermediate portion between these both end portions 51a and 21b.

  As shown in FIG. 13, the distance B between both end portions 51 a and 51 b in the disc holding portion 51 is slightly smaller than the outer diameter C of the optical disc 6. Then, as shown in FIG. 14, when the optical disc 6 is fitted inside the disc holding portion 51, both end portions 51a and 51b of the disc holding portion 51 are elastically displaced in directions away from each other, so that the both end portions 51a. , 51b is equal to the outer diameter C of the optical disc. At this time, both end portions 51a and 51b of the disc holding portion 51 sandwich the outer peripheral portion of the optical disc 6 in the radial direction by an elastic force that tends to return to a direction close to each other as indicated by an arrow F in FIG. Thereby, the optical disk 6 fitted inside the disk holding part 51 can be held.

  On the other hand, as shown in FIG. 12, a pair of guide projections 53 and 54 are formed on the inner side surfaces of the side walls 14b and 14c of the lower half 3 so as to protrude from the rear side end portion to the front side middle portion. Yes. The pair of guide protrusions 53 and 54 are a horizontal plane portion 53a and 54a flattened from the rear end portion toward the front side, and a front side wall from the front end portion of the horizontal plane portions 53a and 54a. And inclined surface portions 53b and 54b inclined toward 14b and 14c.

  Similarly, as shown in FIG. 15, a pair of guide projections 55 and 56 are formed on the inner side surfaces of the side walls 13b and 13c of the upper half 3 so as to protrude from the rear side end portion to the front side middle portion. ing. The pair of guide protrusions 55 and 56 includes a horizontal plane portion 55a and 56a that is flattened from the rear side end portion toward the front side, and a front side wall from the front side end portion of the horizontal plane portions 55a and 56a. And inclined surface portions 55b and 56b inclined toward 13b and 13c.

  These guide protrusions 53, 54, 55, and 56 guide the disk holder 5 that moves in the cartridge body 4 in the insertion direction into the disk drive device in the thickness direction when the upper and lower halves 2 and 3 are brought into contact with each other. It functions as a pressing portion that presses both end portions 51a and 51b of the disc holding portion 51 in the directions approaching each other.

  In the disc cartridge 50 configured as described above, as shown in FIG. 15, when the disc holder 5 is positioned on the back side of the cartridge body 4, the horizontal plane portions 55a of the upper half 2-side guide protrusions 55, 56 are provided. While the both ends of the disk holding part 51 are pressed between the horizontal surface parts 53a and 53a of the lower half 3 side guide protrusions 53 and 54, they are elastically displaced toward each other, and the outer peripheral part of the optical disk 6 has a diameter. Insert in the direction. Thereby, the optical disk 6 can be firmly held by the disk holding part 51.

  On the other hand, in the disc cartridge 50, as shown in FIG. 16, when the disc holder 5 is located on the front side of the cartridge main body 4, the pressure on the both end portions 51a and 51b of the disc holding portion 51 is released and both end portions 51a are released. , 51b elastically return in a direction away from each other. As a result, the optical disk 6 fitted inside the disk holding portion 51 can be easily detached from the disk insertion / removal port 7 side.

  As described above, in the disc cartridge 50, the outer peripheral portion of the optical disc 6 held by the disc holding portion 51 is sandwiched in the radial direction by the both end portions 51a and 51b of the disc holding portion 51, so that external shock, vibration, etc. Even when the optical disc 6 is received, the optical disc 6 held by the disc holder 5 can be prevented from rattling and the optical disc 6 stored in the cartridge body 4 can be prevented from being damaged. it can.

  As shown in FIG. 17, the disc holder 5 provided in the disc cartridge 50 restricts the optical disc 6 held by the disc holder 51 from moving in the thickness direction. The contact protrusion 52 may be provided with a groove 52a that engages the outer periphery of the optical disk 6. The optical disc 6 is guided to the back side of the cartridge body 4 and held by the disc holding portion 51 with the outer peripheral portion engaged with the groove portion 52a. Therefore, in the disc cartridge 50 having such a disc holder 5, the optical disc 6 can be restricted from moving in the thickness direction even when subjected to impact, vibration, or the like from the outside. It is possible to protect the optical disk 6 accommodated therein.

1 is an exploded perspective view of a disk cartridge to which the present invention is applied. It is a perspective view of the disk cartridge. It is a perspective view shown in the state where the optical disk protruded from the disk cartridge. It is the perspective view which looked at the upper half from the inside. It is a perspective view of a disc holder. FIG. 3 is a perspective view showing a state in which the disk cartridge is engaged with the opening of the disk drive device. FIG. 4 is a plan view of a disc cartridge excluding an upper half where a disc holder is in a position for housing an optical disc. Is a sectional view according to in Figure 7 the line _{X 1} -X 1 '. FIG. 5 is a plan view of the disc cartridge with the disc holder holding the upper half in a position where a part of the optical disc is exposed. Is a sectional view according to in Figure 9 the line _{X 2} -X 2 '. It is a perspective view explaining the state which conveys an optical disk. It is an exploded perspective view of another disk cartridge to which the present invention is applied. It is a top view which shows the state before the optical disk of a disk holder is hold | maintained. It is a top view which shows the state by which the optical disk of the disk holding body was hold | maintained. It is the perspective view which looked at the upper half from the inside. It is a perspective view explaining the other example of a disk holding body.

Explanation of symbols

1 disc cartridge, 2 upper half, 3 lower half, 4 cartridge main body, 5 disc holder, 6 optical disc, 7 disc insertion / removal port, 17, 18, 19, 20 guide protrusion, 21 disc holding portion, 22 guide groove, 23a , 23b A pair of elastic displacement pieces, 30 disk drive device, 32 opening, 51 disk storage, 51a, 52b both ends, 53, 54, 55, 56 guide protrusion

Claims (3)

A cartridge main body that stores a disk-shaped recording medium and has a disk insertion / removal port for inserting / removing the stored disk-shaped recording medium formed on one side surface serving as an insertion end to the disk drive device;
The disc-shaped recording medium stored in the cartridge main body is held, and the disc-shaped recording medium that is movable in the insertion / removal direction of the disc-shaped recording medium is moved to the disc insertion / removal side in the cartridge main body. A disk holding body for exposing at least a part of the medium to the outside from the disk insertion / removal port,
The disc holder has an elastic displacement portion that sandwiches the outer peripheral portion of the disc-shaped recording medium,
The cartridge main body includes a pressing portion that elastically displaces the disc-shaped recording medium while pressing the elastic displacement portion when the disc holder moves to the side opposite to the disc insertion / removal opening.   The disk cartridge according to claim 1, wherein the elastic displacement portion sandwiches an outer peripheral portion of the disk-shaped recording medium in a thickness direction.   2. The disc cartridge according to claim 1, wherein the elastic displacement portion sandwiches an outer peripheral portion of the disc-shaped recording medium in a radial direction.

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