Patent EP0253626A2 successfully refreshed from Google Patents.
EP0253626A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Magnetic disc device
Assignee: Fujitsu Ltd
•
Filing: 1987-07-14
•
Granted: —
•
Expires: 2007-07-14
Abstract
Abstract A magnetic disc device comprising a case (13) composed of a base (13a) and a cover (13b); a plurality of magnetic discs (10) housed within the case (13); a plurality of magnetic heads (11) for read/write operations and conducting a seeking motion on each magnetic disc (10) surface; and arms (12e) for driving the magnetic heads (11), wherein a recess (18) for accommodating a printed circuit board (16) is formed on the outer surface of the base (13a) in an area outside of the range of movement of the magnetic heads (11) and the arms (12e). Preferably the recess (18) is located adjacent a drive motor (15) for the discs (10) and the printed circuit board (16) surrounds the drive motor (15).
Inventors
- 👤 Takahisa Mihara
- 👤 Sigeo Saito
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-07 08:23
CPC Classifications
G; G11; G11B; G11B19/00; G11B33/00; G11B33/12; G11B33/121; G11B25/00; G11B25/04; G11B25/043; G11B33/02
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
97 words
A magnetic disc device comprising: a case (13) composed of a base (13a) and a cover (13b); a plurality of magnetic discs (10) housed within the case (13); a plurality of magnetic heads (11) for read/write operations and conducting a seeking motion on each magnetic disc (10) surface; and, arms (12e) for driving the magnetic heads (11), characterised in that a recess (18) for accommodating a printed circuit board (16) is formed on an outer surface of the base (13a) in an area outside of a range of movement of the magnetic heads (11) and arms (12e).
Claim 2
Dependent Claim
97 words
A magnetic disc device comprising: a case (13) composed of a base (13a) and a cover (13b); a plurality of magnetic discs (10) housed within the case (13); a plurality of magnetic heads (11) for read/write operations and conducting a seeking motion on each magnetic disc (10) surface; and, arms (12e) for driving the magnetic heads (11), characterised in that a recess (18) for accommodating a printed circuit board (16) is formed on an outer surface of the base (13a) in an area outside of a range of movement of the magnetic heads (11) and arms (12e).
Claim 3
Dependent Claim
45 words
A magnetic disc device according to claim 1, wherein a main printed circuit board (17) having a size substantially the same as the base (13a) is attached to the outside of the base and a sub-printed circuit board (16) is accommodated within the recess (18).
Claim 4
Dependent Claim
50 words
A magnetic disc device according to claim 2, wherein an interface circuit, a read/write circuit and a servo control circuit for positioning the magnetic heads (11) are all mounted on the main printed circuit board (17) and a disc spindle drive circuit is mounted on the sub-printed circuit board (16).
Claim 5
Dependent Claim
24 words
A magnetic disc device according to claim 1, 2 or 3, wherein the magnetic discs (10) are standard 3.5 inch (88 mm) sized discs.
Claim 6
Dependent Claim
21 words
A magnetic disc device according to claim 4, wherein the device is of the half-height type and accommodates four magnetic discs.
Claim 7
Dependent Claim
170 words
A magnetic disc device comprising: a case (13) having a base (13a); a plurality of magnetic discs (10); a plurality of magnetic heads (11); a head actuator (12b, 12c); a motor (15) for driving a spindle (14) of the magnetic discs (10); a printed circuit board (16) for driving the motor (15); and, a main printed circuit board (17) mounting a read/write circuit for the magnetic discs (10), the magnetic discs (10), the magnetic heads (11) and the head actuator (12b, 12c) all being housed within the case (13), and the motor (15), the printed circuit board (16) for driving the motor (15) and the main printed circuit board (17) all being disposed outside of the base (13a) of the case (13), wherein a recess (18) is provided on an outer surface of the base (13a) in an area opposite to the head actuator (12b, 12c) with respect to the spindle drive motor (15), the printed circuit board (16) for driving the motor (15) being accommodated within the recess (18).
Claim 8
Dependent Claim
170 words
A magnetic disc device comprising: a case (13) having a base (13a); a plurality of magnetic discs (10); a plurality of magnetic heads (11); a head actuator (12b, 12c); a motor (15) for driving a spindle (14) of the magnetic discs (10); a printed circuit board (16) for driving the motor (15); and, a main printed circuit board (17) mounting a read/write circuit for the magnetic discs (10), the magnetic discs (10), the magnetic heads (11) and the head actuator (12b, 12c) all being housed within the case (13), and the motor (15), the printed circuit board (16) for driving the motor (15) and the main printed circuit board (17) all being disposed outside of the base (13a) of the case (13), wherein a recess (18) is provided on an outer surface of the base (13a) in an area opposite to the head actuator (12b, 12c) with respect to the spindle drive motor (15), the printed circuit board (16) for driving the motor (15) being accommodated within the recess (18).
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.