公开(公告)号：US20050249090A1

公开(公告)日：2005-11-10

申请号：US11179473

申请日：2005-07-13

申请人： Harukazu Miyamoto ,  Yoshio Suzuki ,  Motoyuki Suzuki ,  Hisataka Sugiyama ,  Hiroyuki Minemura ,  Tetsuya Fushimi ,  Nobuhiro Tokushuku

发明人： Harukazu Miyamoto ,  Yoshio Suzuki ,  Motoyuki Suzuki ,  Hisataka Sugiyama ,  Hiroyuki Minemura ,  Tetsuya Fushimi ,  Nobuhiro Tokushuku

IPC分类号： G11B7/24 ,  G11B5/09 ,  G11B7/00 ,  G11B7/0037 ,  G11B7/004 ,  G11B7/0045 ,  G11B7/005 ,  G11B7/006 ,  G11B7/007 ,  G11B7/013 ,  G11B7/09 ,  G11B19/20 ,  G11B19/247 ,  G11B19/28 ,  G11B20/00 ,  G11B20/10 ,  G11B20/12 ,  G11B27/19 ,  G11B27/24 ,  G11B27/28 ,  G11B27/30

CPC分类号： G11B20/12 ,  G11B7/0037 ,  G11B7/004 ,  G11B7/0045 ,  G11B7/0053 ,  G11B7/006 ,  G11B7/00718 ,  G11B7/00745 ,  G11B7/0079 ,  G11B7/013 ,  G11B7/0938 ,  G11B7/24082 ,  G11B19/20 ,  G11B19/247 ,  G11B19/28 ,  G11B20/10009 ,  G11B27/19 ,  G11B27/24 ,  G11B27/28 ,  G11B27/3027

摘要： A recording method for an optical medium having a disk-like substrate with a spiral or concentric-shaped groove structure along a track formed on the substrate. The groove structure is wobbled in a radial direction of the medium and the track is divided into a plurality of units in the track direction by at least one radial boundary line formed by a dropout portion. Identification information is disposed in the track at a head of each recording unit at the dropout portion and the medium is divided into a plurality of zones in a radial direction with a length of a circular arc being substantially the same between the zones in a circumferential direction. At least two adjacent units in the radial direction of the medium comprise one zone. The method includes providing the optical medium, and recording information on the optical medium by irradiating an optical spot thereon.

摘要翻译： 一种光学介质的记录方法，其具有沿着形成在基板上的轨道的具有螺旋状或同心状的槽结构的盘状基板。 槽结构在介质的径向方向上摆动，并且轨道在轨道方向上被由压差部分形成的至少一个径向边界线分成多个单元。 识别信息被设置在位于每个记录单元的头部处的轨道处，并且介质被分成多个径向区域，圆周长度在圆周方向上的区域之间基本相同 。 介质的径向方向上的至少两个相邻单元包括一个区域。 该方法包括：通过在其上照射光点来在光学介质上提供光学介质和记录信息。

公开(公告)号：US06728176B2

公开(公告)日：2004-04-27

申请号：US10437306

申请日：2003-05-14

申请人： Harukazu Miyamoto ,  Yoshio Suzuki ,  Motoyuki Suzuki ,  Hisataka Sugiyama ,  Hiroyuki Minemura ,  Tetsuya Fushimi ,  Nobuhiro Tokushuku

发明人： Harukazu Miyamoto ,  Yoshio Suzuki ,  Motoyuki Suzuki ,  Hisataka Sugiyama ,  Hiroyuki Minemura ,  Tetsuya Fushimi ,  Nobuhiro Tokushuku

IPC分类号： G11B700

CPC分类号： G11B20/12 ,  G11B7/0037 ,  G11B7/004 ,  G11B7/0045 ,  G11B7/0053 ,  G11B7/006 ,  G11B7/00718 ,  G11B7/00745 ,  G11B7/0079 ,  G11B7/013 ,  G11B7/0938 ,  G11B7/24082 ,  G11B19/20 ,  G11B19/247 ,  G11B19/28 ,  G11B20/10009 ,  G11B27/19 ,  G11B27/24 ,  G11B27/28 ,  G11B27/3027

摘要： An optical reproducing method using an optical medium having a disk-like substrate with plural levels associated with grooves, and a plurality of zones. Each track is divided into a plurality of recording and radially adjacent recording units of a respective zone are delimited by a pair of radial lines joined to form a central angle at an apex proximate to a center of the disk-like substrate. The grooves are wobbled in the radial direction of the disk-like substrate with a length of each recording unit being an integer multiple of a cycle of the wobble, and the integer multiple being the same for the different zones. An optical spot is irradiated on the optical medium, a reflected beam from the optical medium is detected, and information on the optical medium is reproduced by using a signal obtained by the reflected beam.

摘要翻译： 一种光学再现方法，使用具有与凹槽相关联的多个级别的盘状基板的光学介质和多个区域。 每个轨道被分成多个记录并且相应区域的径向相邻的记录单元由一对径向线限定，所述一对径向线在靠近盘状基底的中心的顶点处形成中心角。 凹槽在圆盘状基板的径向方向上摆动，每个记录单元的长度是摆动周期的整数倍，并且整数倍对于不同区域是相同的。 在光学介质上照射光点，检测来自光学介质的反射光束，并通过使用由反射光束获得的信号再现关于光学介质的信息。

公开(公告)号：US06580686B2

公开(公告)日：2003-06-17

申请号：US10075259

申请日：2002-02-15

申请人： Harukazu Miyamoto ,  Yoshio Suzuki ,  Motoyuki Suzuki ,  Hisataka Sugiyama ,  Hiroyuki Minemura ,  Tetsuya Fushimi ,  Nobuhiro Tokushuku

发明人： Harukazu Miyamoto ,  Yoshio Suzuki ,  Motoyuki Suzuki ,  Hisataka Sugiyama ,  Hiroyuki Minemura ,  Tetsuya Fushimi ,  Nobuhiro Tokushuku

IPC分类号： G11B724

CPC分类号： G11B20/12 ,  G11B7/0037 ,  G11B7/004 ,  G11B7/0045 ,  G11B7/0053 ,  G11B7/006 ,  G11B7/00718 ,  G11B7/00745 ,  G11B7/0079 ,  G11B7/013 ,  G11B7/0938 ,  G11B7/24082 ,  G11B19/20 ,  G11B19/247 ,  G11B19/28 ,  G11B20/10009 ,  G11B27/19 ,  G11B27/24 ,  G11B27/28 ,  G11B27/3027

摘要： An information recording apparatus for recording information to an optical recording medium including, a disk-like substrate, a spiral or concentric-shaped groove structure along a track formed on a disk-like substrate, the groove structure being wobbled in a radial direction of the optical recording medium, the track being divided into a plurality of recording units in the track direction by at least one radial boundary line, at least two adjacent recording units in the radius direction of the optical recording medium comprise one zone, the optical recording medium including a plurality of zones, and the groove structure included in the adjacent recording units within any zone having substantially the same number of wobbling. The information recording apparatus includes an irradiation source for irradiating a light spot on the optical recording medium, and a controller for controlling an irradiation position of an optical spot from the irradiation source.

摘要翻译： 一种信息记录装置，用于将信息记录到沿着形成在盘状基板上的轨道上的包括圆盘状基板，螺旋状或同心状的槽结构的光记录介质，所述槽结构沿着 光记录介质，所述轨道通过至少一个径向边界线在轨道方向上分成多个记录单元，光记录介质的半径方向上的至少两个相邻的记录单元包括一个区域，所述光记录介质包括 多个区域，并且包括在具有基本相同数量的摆动的任何区域内的相邻记录单元中的槽结构。 信息记录装置包括用于照射光记录介质上的光点的照射源和用于控制来自照射源的光点的照射位置的控制器。

公开(公告)号：US06545962B2

公开(公告)日：2003-04-08

申请号：US10075611

申请日：2002-02-15

申请人： Harukazu Miyamoto ,  Yoshio Suzuki ,  Motoyuki Suzuki ,  Hisataka Sugiyama ,  Hiroyuki Minemura ,  Tetsuya Fushimi ,  Nobuhiro Tokushuku

发明人： Harukazu Miyamoto ,  Yoshio Suzuki ,  Motoyuki Suzuki ,  Hisataka Sugiyama ,  Hiroyuki Minemura ,  Tetsuya Fushimi ,  Nobuhiro Tokushuku

IPC分类号： G11B700

CPC分类号： G11B20/12 ,  G11B7/0037 ,  G11B7/004 ,  G11B7/0045 ,  G11B7/0053 ,  G11B7/006 ,  G11B7/00718 ,  G11B7/00745 ,  G11B7/0079 ,  G11B7/013 ,  G11B7/0938 ,  G11B7/24082 ,  G11B19/20 ,  G11B19/247 ,  G11B19/28 ,  G11B20/10009 ,  G11B27/19 ,  G11B27/24 ,  G11B27/28 ,  G11B27/3027

摘要： An optical reproducing method for reproducing information on an optical medium, including a disk-like substrate, a spiral or concentric-shaped groove structure along tracks formed on the disk-like substrate with each of the tracks being divided into a plurality of units including a dropout portion in a circumferential direction of the groove structure. The dropout portion is a non-groove portion. The groove structure is formed with a wobble in a fixed cycled in a radial direction with the fixed cycle of the wobble continuing in the circumferential direction along the track. Each length of the units is an integer multiple of the cycle of the wobble. The method includes irradiating an optical spot on the optical medium, detecting a reflected beam from the optical medium, and reproducing information on the optical medium by using a signal obtained by the reflected beam.

摘要翻译： 一种用于在光盘介质上再现信息的光学再现方法，该光学介质包括盘状基片，螺旋形或同心形的沟槽结构，沿着形成在盘状基片上的轨道，每个轨道被分成多个单元， 凹槽结构的圆周方向上的脱落部。 脱落部是非槽部。 凹槽结构形成为具有在径向上固定循环的摆动，其中摆动的固定周期沿着轨道在圆周方向上延续。 单位的每个长度是摆动周期的整数倍。 该方法包括在光学介质上照射光点，检测来自光学介质的反射光束，并通过使用由反射光束获得的信号在光学介质上再现信息。

公开(公告)号：US06542458B2

公开(公告)日：2003-04-01

申请号：US10075612

申请日：2002-02-15

申请人： Harukazu Miyamoto ,  Yoshio Suzuki ,  Motoyuki Suzuki ,  Hisataka Sugiyama ,  Hiroyuki Minemura ,  Tetsuya Fushimi ,  Nobuhiro Tokushuku

发明人： Harukazu Miyamoto ,  Yoshio Suzuki ,  Motoyuki Suzuki ,  Hisataka Sugiyama ,  Hiroyuki Minemura ,  Tetsuya Fushimi ,  Nobuhiro Tokushuku

IPC分类号： G11B724

CPC分类号： G11B20/12 ,  G11B7/0037 ,  G11B7/004 ,  G11B7/0045 ,  G11B7/0053 ,  G11B7/006 ,  G11B7/00718 ,  G11B7/00745 ,  G11B7/0079 ,  G11B7/013 ,  G11B7/0938 ,  G11B7/24082 ,  G11B19/20 ,  G11B19/247 ,  G11B19/28 ,  G11B20/10009 ,  G11B27/19 ,  G11B27/24 ,  G11B27/28 ,  G11B27/3027

摘要： An information recording medium including a disk-like substrate with a plurality of tracks extending in a circumferential direction on the disk-like substrate and associated with a plurality of grooves. The grooves are wobbled in a radial direction of the disk-like substrate and each track is divided into a plurality of recording units of circular arc shape extending in the circumferential direction. A zone is provided which includes at least two recording units which are adjacent each other in the radial direction, and radially adjacent recording units of a respective zone are delimited by a pair of radial lines, and central angles formed by the recording units are constant within one zone.

摘要翻译： 一种信息记录介质，包括具有多个轨道的圆盘状基板，所述多个轨道在圆盘状基板上沿圆周方向延伸并且与多个凹槽相关联。 凹槽在圆盘状基片的径向方向上摆动，并且每个轨道被分成沿圆周方向延伸的多个圆弧形记录单元。 提供了一个区域，其包括在径向上彼此相邻的至少两个记录单元，并且各个区域的径向相邻记录单元由一对径向线限定，并且由记录单元形成的中心角度在 一个区域。

公开(公告)号：US5263015A

公开(公告)日：1993-11-16

申请号：US795506

申请日：1991-11-21

申请人： Toshio Niihara ,  Harukazu Miyamoto ,  Makoto Miyamoto ,  Keikichi Andoo ,  Tsuyoshi Toda ,  Atsushi Saito ,  Masahiro Ojima ,  Yoshio Suzuki ,  Hiroyuki Awano

发明人： Toshio Niihara ,  Harukazu Miyamoto ,  Makoto Miyamoto ,  Keikichi Andoo ,  Tsuyoshi Toda ,  Atsushi Saito ,  Masahiro Ojima ,  Yoshio Suzuki ,  Hiroyuki Awano

IPC分类号： G11B11/105 ,  G11B7/00

CPC分类号： G11B11/10586 ,  G11B11/10517 ,  G11B11/10584

摘要： According to this invention, since the range of power necessary for erasing an overwritable magneto-optical recording medium is set to 2.5 mW or above, overwriting is possible without erase residue due to mark (magnetic domain) diameter difference, tracking offset, ambient temperature variation and characteristic dispersion between magneto-optical recording media and thus the magneto-optical recording medium has high reliability. Moreover, the rate of change, K of the switching field of the memory layer relative to temperature at around an erase start temperature can be controlled to be a constant value so that an erase power margin can be increased and that the tolerance to the reading light when the ambient temperature rises can be improved.

摘要翻译： 根据本发明，由于将可重写磁光记录介质擦除所必需的功率范围设定为2.5mW以上，所以能够进行覆盖，不会由于标记（磁畴）直径差，跟踪偏移，环境温度变化引起的擦除残留 并且磁光记录介质和磁光记录介质之间的特征色散具有高可靠性。 此外，存储层的开关场相对于擦除开始温度附近的温度的变化率K可以被控制为一个恒定值，使得可以增加擦除功率余量，并且对读取光的容限 当环境温度升高时可以改善。

公开(公告)号：US5991260A

公开(公告)日：1999-11-23

申请号：US603162

申请日：1996-02-20

申请人： Kiyoshi Kano ,  Yasuo Ohtsuka ,  Mikio Shiraishi ,  Toshifumi Takeuchi ,  Masafumi Nakamura ,  Masayuki Inoue ,  Yoshio Suzuki ,  Michio Miura

发明人： Kiyoshi Kano ,  Yasuo Ohtsuka ,  Mikio Shiraishi ,  Toshifumi Takeuchi ,  Masafumi Nakamura ,  Masayuki Inoue ,  Yoshio Suzuki ,  Michio Miura

IPC分类号： G11B17/04 ,  G11B23/03 ,  G11B3/70

CPC分类号： G11B17/0436 ,  G11B17/047 ,  G11B23/0308 ,  G11B23/0311 ,  G11B23/0317

摘要： A disk cartridge and a disk device for receiving the disk cartridge to enable recording and/or reproducing of information from or on a disk housed within the disk cartridge. The disk cartridge includes a disk in which information is recorded and/or reproduced, a case for housing the disk which case has opposite faces including a window in a respective face for exposing a part of the disk therethrough. A shutter is mounted with respect to the case so as to open or close a window of a respective face of the case with the shutter being movable in opposite directions with respect to the window from a position in which the window is closed to a position in which the window is open. The disk cartridge may include an openable part of the case for enabling the disk to be taken in and out of the case through the openable part thereof and a discrimination arrangement for enabling discrimination of different types of disk cartridges from one another. The disk cartridge may be arranged to enable exchange of disks of a same or different format including CD (compact disk), DVD (digital video disk) and PD (phase change disk) and the discrimination arrangement enables prevention of a disk cartridge of one different type from being erroneously inserted into a disk device receiving apparatus which is not compatible for the different type of disk cartridge.

摘要翻译： 磁盘盒和磁盘装置，用于接收磁盘盒，以便能够从容纳在磁盘盒内的磁盘记录和/或再现信息。 磁盘盒包括其中记录和/或再现信息的盘，用于容纳盘的壳体具有相对面的壳体，包括在相应面中的窗口，用于使盘的一部分暴露在其中。 相对于壳体安装有快门，以便打开或关闭壳体的相应表面的窗口，其中快门可相对于窗口从相对于窗口的相反方向移动，从窗口关闭的位置到 窗户打开。 磁盘盒可以包括壳体的可打开部分，用于使盘能够通过其可打开部分进入和离开壳体，以及用于使得能够区分不同类型的盘盒的鉴别装置。 磁盘盒可被布置成能够交换包括CD（光盘），DVD（数字视频盘）和PD（相变盘）的相同或不同格式的盘，并且鉴别装置能够防止一个不同的盘盒 类型被错误地插入到与不同类型的盘盒不兼容的盘装置接收装置中。

公开(公告)号：US06181664B2

公开(公告)日：2001-01-30

申请号：US09525121

申请日：2000-03-14

申请人： Kiyoshi Kano ,  Yasuo Ohtsuka ,  Mikio Shiraishi ,  Toshifumi Takeuchi ,  Masafumi Nakamura ,  Masayuki Inoue ,  Yoshio Suzuki ,  Michio Miura

发明人： Kiyoshi Kano ,  Yasuo Ohtsuka ,  Mikio Shiraishi ,  Toshifumi Takeuchi ,  Masafumi Nakamura ,  Masayuki Inoue ,  Yoshio Suzuki ,  Michio Miura

IPC分类号： G11B3302

CPC分类号： G11B17/0436 ,  G11B17/047 ,  G11B23/0308 ,  G11B23/0311 ,  G11B23/0317

摘要： A disk apparatus for use in a disk cartridge system including different types of disk cartridge. The disk cartridge system has a first disk cartridge and a second disk cartridge. The first disk cartridge including a first case having a substantially rectangular shape with first, second, third and fourth edges, and at least one of a first groove in both of the second and third edges, and a first cutout portion in both of the second and third edges and passing through a thickness of the first case. The second disk cartridge includes a second case having a substantially rectangular shape with fifth, sixth, seventh and eighth edges, the fifth edge of the second case being delimited by a fifth corner portion connecting the fifth edge and sixth edge, and at least one of a second groove located in only one of the sixth and seventh edges and a second cutout portion located in both of the sixth and seventh edges without passing through a thickness of the second case. A length, width and thickness of the first case are substantially equal to a length, width and thickness of the second case and a diameter and thickness of the first disk are substantially equal to a diameter and thickness of the second disk. The disk apparatus having a discrimination arrangement which discriminates at least one of the groove and the cutout portion.

摘要翻译： 一种用于包括不同类型的盘盒的盘盒系统的盘装置。 盘盒系统具有第一盘盒和第二盘盒。 第一盒式磁盘包括具有第一，第二，第三和第四边缘的大致矩形形状的第一壳体，以及第二和第三边缘两者中的至少一个第一凹槽以及第二凹部中的第二切口部分 和第三边缘并穿过第一壳体的厚度。 第二盒式磁盘包括具有第五，第六，第七和第八边缘的基本矩形形状的第二壳体，第二壳体的第五边缘由连接第五边缘和第六边缘的第五角部限定， 仅位于第六和第七边缘中的一个的第二凹槽和位于第六和第七边缘中的第二切口部分，而不穿过第二壳体的厚度。 第一壳体的长度，宽度和厚度基本上等于第二壳体的长度，宽度和厚度，并且第一盘的直径和厚度基本上等于第二盘的直径和厚度。 该盘装置具有区分凹槽和切口部分中的至少一个的识别装置。

公开(公告)号：US6075763A

公开(公告)日：2000-06-13

申请号：US400846

申请日：1999-09-21

申请人： Kiyoshi Kano ,  Yasuo Ohtsuka ,  Mikio Shiraishi ,  Toshifumi Takeuchi ,  Masafumi Nakamura ,  Masayuki Inoue ,  Yoshio Suzuki ,  Michio Miura

发明人： Kiyoshi Kano ,  Yasuo Ohtsuka ,  Mikio Shiraishi ,  Toshifumi Takeuchi ,  Masafumi Nakamura ,  Masayuki Inoue ,  Yoshio Suzuki ,  Michio Miura

IPC分类号： G11B17/04 ,  G11B23/03 ,  G11B33/02 ,  G11B3/70

CPC分类号： G11B17/0436 ,  G11B17/047 ,  G11B23/0308 ,  G11B23/0311 ,  G11B23/0317

摘要： A disk cartridge system including different types of disk cartridges for use in a cartridge drive apparatus, including first and second disk cartridges. The first disk cartridge including a first case having a substantially rectangular shape with first, second, third and fourth edges, the first edge of the case being delimited by a first corner portion connecting the first edge and second edge and a second corner portion connecting the first edge and the third edge. The first case has a first groove at a side plane of both of the second and third edges. The first case also has a first cutout portion at both of the second and the third edges and extending in a direction of and passing through the thickness of the first case. The second disk cartridge includes a second case with a substantially rectangular shape with fifth, sixth, seventh and eighth edges, the fifth edge of the second case being delimited by a fifth corner portion connecting the fifth edge and sixth edge and a sixth corner portion connecting the fifth edge and the seventh edge. The second case has a second groove at a side plane of only one of the sixth and seventh edge. The second case also has a second cutout portion at both of the sixth and the seventh edges extending in a direction of the thickness of the second case without passing through the thickness of the second case. A length, width and thickness of the first case are substantially equal to a length, width and thickness of the second case.

摘要翻译： 一种盘盒系统，包括用于盒驱动装置的不同类型的盘盒，包括第一和第二盘盒。 第一盒式磁盘包括具有第一，第二，第三和第四边缘的大致矩形形状的第一壳体，壳体的第一边缘由连接第一边缘和第二边缘的第一角部限定，第二角部连接 第一边缘和第三边缘。 第一壳体在第二和第三边缘的两侧的侧面具有第一凹槽。 第一壳体还具有在第二和第三边缘处的第一切口部分，并且在第一壳体的厚度方向上延伸并穿过第一壳体的厚度。 第二盒式磁盘包括具有第五，第六，第七和第八边缘的大致矩形形状的第二壳体，第二壳体的第五边缘由连接第五边缘和第六边缘的第五角部分界定，第六角部分连接 第五边和第七边。 第二壳体在第六边缘和第七边缘中只有一个的侧面具有第二凹槽。 第二壳体还具有在第二壳体的厚度方向上延伸的第六和第七边缘的第二切口部分，而不穿过第二壳体的厚度。 第一壳体的长度，宽度和厚度基本上等于第二壳体的长度，宽度和厚度。

公开(公告)号：US6108299A

公开(公告)日：2000-08-22

申请号：US400847

申请日：1999-09-21

申请人： Kiyoshi Kano ,  Yasuo Ohtsuka ,  Mikio Shiraishi ,  Toshifumi Takeuchi ,  Masafumi Nakamura ,  Masayuki Inoue ,  Yoshio Suzuki ,  Michio Miura

发明人： Kiyoshi Kano ,  Yasuo Ohtsuka ,  Mikio Shiraishi ,  Toshifumi Takeuchi ,  Masafumi Nakamura ,  Masayuki Inoue ,  Yoshio Suzuki ,  Michio Miura

IPC分类号： G11B17/04 ,  G11B23/03 ,  G11B3/70

CPC分类号： G11B17/0436 ,  G11B17/047 ,  G11B23/0308 ,  G11B23/0311 ,  G11B23/0317

摘要： A disk cartridge system having different types of disk cartridges for use in a disk cartridge drive apparatus. A first disk cartridge includes a first case having a substantially rectangular shape with first, second, third and fourth edges, the first edge of the case being delimited by a first corner portion connecting the first edge and second edge and a second corner portion connecting the first edge and the third edge, the first case having a first cutout portion at both of the second and third edges and extending in a direction and passing through a thickness of the first case, and a first disk being housed in the first case. A second disk cartridge includes a second case with a substantially rectangular shape with fifth, sixth, seventh and eighth edges, the fifth edge of the second case being delimited by a fifth corner portion connecting the fifth edge and sixth edge and a sixth corner portion connecting the fifth edge and the seventh edge, the second case having a second cutout portion at both of the sixth and seventh edge and extending in a direction of a thickness of the second case without passing through the thickness of the second case, and a second disk being housed in the second case. A length, width and thickness of the first case are substantially equal to a length, width and thickness of the second case and a diameter and thickness of the first disk are substantially equal to a diameter and width of the second disk.

摘要翻译： 一种具有用于盘盒驱动装置的不同类型的盘盒的盘盒系统。 第一盒式磁盘包括具有第一，第二，第三和第四边缘的大致矩形形状的第一壳体，壳体的第一边缘由连接第一边缘和第二边缘的第一角部限定，第二角部连接 第一边缘和第三边缘，第一壳体在第二和第三边缘处都具有第一切口部分，并且沿着方向延伸并且穿过第一壳体的厚度，并且第一盘片被容纳在第一壳体中。 第二盒式磁盘包括具有第五，第六，第七和第八边缘的大致矩形形状的第二壳体，第二壳体的第五边缘由连接第五边缘和第六边缘的第五角部分界定，第六角部分连接 第五边缘和第七边缘，第二壳体具有在第六和第七边缘处的第二切口部分，并且在不穿过第二壳体的厚度的情况下在第二壳体的厚度方向上延伸，并且第二盘 被安置在第二种情况下。 第一壳体的长度，宽度和厚度基本上等于第二壳体的长度，宽度和厚度，并且第一盘的直径和厚度基本上等于第二盘的直径和宽度。