EP0230963A2
Expired / Lapsed
EP
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Information processing apparatus
Assignee: Toshiba Corp
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Filing: 1987-01-20
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Granted: —
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Expires: 2007-01-20
Abstract
Abstract An information processing apparatus includes an optical disk (l0) and a drive mechanism (l2) for rotating the disk. The disk has a disk-shaped body (l6) and an attractable portion (22) at the central portion of the body. The attractable portion has an attractable member (24) projecting from the body. A center hole (26a), defining the center of rotation of the body, is bored in the attractable member. The drive mechanism includes a turntable (54) which is rotated by a motor (50). A depression (58) is formed in a support surface (54a) of the turntable. A magnetic attraction unit (60) is arranged in the depression so as to magnetically attract the attractable portion, whereby the attractable member is housed in the depression and the surface of the body is in contact with the support surface.
Inventors
- 👤 Kazuharu C/O Patent Division Odawara
- 👤 Yoshiaki C/O Patent Division Tago
- 👤 Nobuo Inage
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-04 17:25
CPC Classifications
G; G11; G11B; G11B7/00; G11B7/08; G11B7/09; G11B7/095; G11B17/00; G11B17/02; G11B17/022; G11B17/028; G11B17/0282; G11B19/00; G11B19/20; G11B19/2009; G11B23/00; G11B23/0014; G11B23/0021; G11B23/0028; G11B23/0035; G11B33/00; G11B33/14
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
193 words
An information processing apparatus comprising: an information memory medium (10) having a disk-shaped body (16) and a center hole defining the center of rotation of the body; and a drive mechanism for (12) for rotating the information memory medium, said mechanism including a turntable (54) having a support surface (54a) for supporting the memory medium (10), a positioning portion for engaging the center hole of the information memory medium so as to align the memory medium (10) with the turntable (54), and a drive mechanism (12) for rotating the turntable (54); characterized in that: said information memory medium (l0) includes an attractable portion (22) provided at the central portion of the body (l6) and having an attractable member (24) which projects from the body; said center hole (26a) is formed in the attractable member; said turntable (54) has a depression (58) formed in the support surface (54a); and said drive mechanism (l2) includes magnetic attraction means (60) arranged in the depression (58), for magnetically attracting the attractable portion, whereby the attractable member is housed in the depression and the surface of the body is in contact with the support surface of the turntable.
Claim 2
Dependent Claim
193 words
An information processing apparatus comprising: an information memory medium (10) having a disk-shaped body (16) and a center hole defining the center of rotation of the body; and a drive mechanism for (12) for rotating the information memory medium, said mechanism including a turntable (54) having a support surface (54a) for supporting the memory medium (10), a positioning portion for engaging the center hole of the information memory medium so as to align the memory medium (10) with the turntable (54), and a drive mechanism (12) for rotating the turntable (54); characterized in that: said information memory medium (l0) includes an attractable portion (22) provided at the central portion of the body (l6) and having an attractable member (24) which projects from the body; said center hole (26a) is formed in the attractable member; said turntable (54) has a depression (58) formed in the support surface (54a); and said drive mechanism (l2) includes magnetic attraction means (60) arranged in the depression (58), for magnetically attracting the attractable portion, whereby the attractable member is housed in the depression and the surface of the body is in contact with the support surface of the turntable.
Claim 3
Dependent Claim
75 words
An information processing apparatus according to claim l, characterized in that said depression (58) has a predetermined cross-sectional shape, said magnetic attraction means (60) has a top surface located at distance T from the support surface (54a) of the turntable (54), and said attractable member (24) has a cross-sectional shape such that the attractable member can be housed in the depression (58), the height of projection of the attractable member being shorter than distance T.
Claim 4
Dependent Claim
57 words
An information processing apparatus according to claim 2, characterized in that said depression (58) has a circular cross section and is coaxial with the positioning portion (52a), and said attractable member (24) has a circular cross section and is coaxial with the center hole (26a), said attractable member having a diameter smaller than that of the depression.
Claim 5
Dependent Claim
20 words
An information processing apparatus according to claim l, characterized in that said turntable (54) is formed of a nonmagnetic material.
Claim 6
Dependent Claim
24 words
An information processing apparatus according to claim l, characterized in that said magnetic attraction means (60) includes a magnet (64) and a yoke (62).
Claim 7
Dependent Claim
32 words
An information processing apparatus according to claim 5, characterized in that said magnet (64) and yoke (62) are ring-shaped, and are arranged so as to be coaxial with the positioning portion (52a).
Claim 8
Dependent Claim
45 words
An information processing apparatus according to claim l, characterized in that said drive source includes a motor (50) having a rotating shaft (52), and said turntable (54) is fixed coaxially to the shaft, said shaft having a tip end portion constituting the positioning portion (52a).
Claim 9
Dependent Claim
100 words
An information processing apparatus according to claim l, characterized in that said body (l6) of the information memory medium (l0) includes a disk-shaped base plate (l8) formed by injection molding and having a bore (l9), said bore including a first portion (l9a) defined by part of a die assembly during the injection molding and having a predetermined axial length, and a second portion (l9b) formed by cutting, and said attractable member (24) includes a projection (30) fitted in the first portion of the bore, the height of said projection (30) being shorter than the axial length of the first portion.
Claim 10
Dependent Claim
117 words
An information processing apparatus according to claim l, characterized in that said body (l6) of the information memory medium (l0) includes a pair of disk-shaped base plates (l8) each having a bore (l9) and fixed coaxially to each other, and information record layers (20) formed individually on the base plates, said attractable portion (22) includes a pair of attractable members (24) attached to the central portions of their corresponding base plates and each having the center hole (26a), and said positioning portion (52a) has a length such that the positioning portion engages the center hole of that attractable member fixed to the turntable-side base plate when the information memory medium (l0) is mounted on the turntable (54).
Claim 11
Dependent Claim
57 words
l0. An information processing apparatus according to claim l, characterized in that said body (22) includes a disk-shaped base plate (l8), and said attractable member (24) includes a centering member (26) fixed to the base plate, and a magnetic member (28) attached to the centering member and adapted to be attracted by the magnetic attraction means (60).
Claim 12
Dependent Claim
56 words
An information processing apparatus according to claim l0, characterized in that said attractable member (24) includes mounting means (44) for mounting the magnetic member (28) to the centering member (26) so that the magnetic member is immovable in the axial direction of the body (22), and is slightly movable in the radial direction of the body.
Claim 13
Dependent Claim
61 words
An information processing apparatus according to claim ll, characterized in that said magnetic member (28) is ring-shaped, and is arranged to be coaxial with the center hole (26a), and said mounting means (44) includes a retaining portion (46) formed on the centering member (26), and a retaining claw (48) formed on the magnetic member so as to engage the retaining portion.
Claim 14
Dependent Claim
33 words
An information processing apparatus according to claim l0, characterized in that said centering member (26) is formed of a material whose coefficient of thermal expansion approximates to that of said disk-shaped body (22).
Claim 15
Dependent Claim
27 words
An information processing apparatus according to claim l0, characterized in that said centering member (26) and said disk-shaped base plate (l8) are formed of the same material.
Claim 16
Independent Claim
116 words
An apparatus for rotatably supporting an information memory medium having a disk-shaped body and an attractable portion at the central portion of the body, the attractable portion including an attractable member projecting from the body, said apparatus comprising: a turntable (54) for rotating the information memory medium (l0), said turntable having a supporting surface (54a) for supporting the information memory medium thereon; characterized by further comprising: magnetic attraction means (60) provided on said turntable, for magnetically attracting the attractable portion of the information memory medium toward said turntable so that said supporting surface comes in contact with the surface of the body and is out of contact with the attractable member of the information memory medium.
Claim 17
Independent Claim
116 words
An apparatus for rotatably supporting an information memory medium having a disk-shaped body and an attractable portion at the central portion of the body, the attractable portion including an attractable member projecting from the body, said apparatus comprising: a turntable (54) for rotating the information memory medium (l0), said turntable having a supporting surface (54a) for supporting the information memory medium thereon; characterized by further comprising: magnetic attraction means (60) provided on said turntable, for magnetically attracting the attractable portion of the information memory medium toward said turntable so that said supporting surface comes in contact with the surface of the body and is out of contact with the attractable member of the information memory medium.
Claim 18
Dependent Claim
100 words
An information memory medium for reproducing data associated with a turntable for rotating said information memory medium and magnetic attraction means for magnetically attracting said information memory medium toward the turntable, said information memory medium comprising: a plane body (l6) having a recording portion (20) for storing the data; characterized in that: an attractable member (24) projects from said plane body (l6) so as to be attracted by the magnetic attraction means (60), wherein the surface of said plane body comes in contact with the surface of the turntable (54) and is out of contact with the magnetic attraction member.
Claim 19
Dependent Claim
100 words
An information memory medium for reproducing data associated with a turntable for rotating said information memory medium and magnetic attraction means for magnetically attracting said information memory medium toward the turntable, said information memory medium comprising: a plane body (l6) having a recording portion (20) for storing the data; characterized in that: an attractable member (24) projects from said plane body (l6) so as to be attracted by the magnetic attraction means (60), wherein the surface of said plane body comes in contact with the surface of the turntable (54) and is out of contact with the magnetic attraction member.
References Cited (Backward Citations)
No citation records indexed.
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