Patent US4199560A successfully refreshed from Google Patents.
EP0336423A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Magneto-optical disk device
Assignee: Sharp Corp
•
Filing: 1989-04-06
•
Granted: —
•
Expires: 2009-04-06
Abstract
Abstract A magneto-optical disk device for receiving a magneto-optical disk housed in a cassette (CA) and for driving the magneto-optical disk by a disk drive motor to read/write the disk, includes a movable cassette carrier (22) having a top plate (22a) for receiving the cassette (CA) therein, a read/write head located under the cassette carrier (22), a magnetic field coil (11) slidably mounted on the top plate (22a) above the read/write head to move in a direction parallel to the movement of the read/write head, a pole (7) extending approximately perpendicular from the read/write head at a position offset from the cassette carrier (22), and an arm (8) having one end slidably mounted on the pole (7) and other end fixedly connected to the magnetic field coil (11).
Inventors
- 👤 Toshihiro Yamanaka
- 👤 Tetsuyuki Takemoto
- 👤 Masahiro Horii
- 👤 Shoji Taniguchi
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-23 09:57
CPC Classifications
G; G11; G11B; G11B17/00; G11B17/02; G11B17/04; G11B17/041; G11B17/043; G11B11/00; G11B11/10; G11B11/105; G11B11/1055; G11B11/10552; G11B11/10556; G11B11/10558; G11B11/10567; G11B11/10571
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
90 words
A magneto-optical disk device comprising: a magnetic field coil (11) which applies a magnetic field to a magneto-optical disk; an optical head (2, 3) which slides parallel to the face of said magneto-optical disk; a first support member (8) which supports said magnetic field coil; a second support member (7) which is mounted to said optical head (2, 3) and supports said first support member (8) in such a manner that the first support member is able to slide in a direction perpendicular to the face of the magneto-optical disk.
Claim 2
Dependent Claim
90 words
A magneto-optical disk device comprising: a magnetic field coil (11) which applies a magnetic field to a magneto-optical disk; an optical head (2, 3) which slides parallel to the face of said magneto-optical disk; a first support member (8) which supports said magnetic field coil; a second support member (7) which is mounted to said optical head (2, 3) and supports said first support member (8) in such a manner that the first support member is able to slide in a direction perpendicular to the face of the magneto-optical disk.
Claim 3
Dependent Claim
225 words
A magneto-optical disk device for receiving a magneto-optical disk housed in a cassette (CA) and for driving said magneto-optical disk by a disk drive motor (M) to read/write said disk, said magneto-optical disk device comprising: a cassette carrier (1) having a top plate member (22a) for receiving said cassette therein; first driving means (30, 28, 26, 18, 20, 24) for driving said cassette carrier (1) to a position above said disk drive motor (M) and to descend so as to have said cassette (CA) in engagement with said motor (M); read/write head means (2, 3) located under said cassette carrier (1); second driving means (6) for driving said read/write head means (2, 3) to move in a direction parallel to a face of said top plate member (22a); a magnetic field coil (11) slidably mounted on said top plate member (22a) above said read/write head means (2, 3) to move in a direction parallel to the movement of said read/write head means (2, 3); and an elevation connecting means (7, 8) for connecting said read/write head means (2, 3) with said magnetic field coil (11) such that said magnetic field coil (11) is maintained above said read/write head means (2, 3) after said cassette carrier (1) is descended and during the movement of said read/write head means (2, 3) by said second driving means (6).
Claim 4
Dependent Claim
225 words
A magneto-optical disk device for receiving a magneto-optical disk housed in a cassette (CA) and for driving said magneto-optical disk by a disk drive motor (M) to read/write said disk, said magneto-optical disk device comprising: a cassette carrier (1) having a top plate member (22a) for receiving said cassette therein; first driving means (30, 28, 26, 18, 20, 24) for driving said cassette carrier (1) to a position above said disk drive motor (M) and to descend so as to have said cassette (CA) in engagement with said motor (M); read/write head means (2, 3) located under said cassette carrier (1); second driving means (6) for driving said read/write head means (2, 3) to move in a direction parallel to a face of said top plate member (22a); a magnetic field coil (11) slidably mounted on said top plate member (22a) above said read/write head means (2, 3) to move in a direction parallel to the movement of said read/write head means (2, 3); and an elevation connecting means (7, 8) for connecting said read/write head means (2, 3) with said magnetic field coil (11) such that said magnetic field coil (11) is maintained above said read/write head means (2, 3) after said cassette carrier (1) is descended and during the movement of said read/write head means (2, 3) by said second driving means (6).
Claim 5
Dependent Claim
22 words
A magneto-optical disk device as claimed in Claim 2, wherein said read/write head means (2, 3) comprises a laser emission port 3.
Claim 6
Dependent Claim
63 words
A magneto-optical disk device as claimed in Claim 2, wherein said elevation connecting means (7, 8) comprises a pole (7) extending approximately perpendicular from said read/write head means (2, 3) at a position offset from said cassette carrier (1), and an arm (8) having one end slidably mounted on said pole (7) and other end fixedly connected to said magnetic field coil (11).
Claim 7
Dependent Claim
21 words
A magneto-optical disk device as claimed in Claim 4, wherein said arm (7) being raised above said top plate member (22a).
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.