US5243480A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Floppy disk drive
Assignee: Mitsumi Electric Co Ltd
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Filing: 1991-07-18
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Granted: 1993-09-07
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Expires: 2011-07-18
Abstract
Abstract The present invention aims at reducing the thickness of a floppy disk drive by minimizing a vertical movement of a floppy disk-retaining disk holder and reducing the height of a chassis. The disk holder is provided on both side surfaces of its rear end portion with support shafts, which are connected to the chassis so that the support shafts can be turned. The disk holder becomes pivotable around these support shafts as fulcrums, i.e., the front portion of the disk holder is turned vertically. The upper and lower magnetic heads are formed so that they can be engaged with and disengaged from the floppy disk in conjunction with a pivotal movement of the disk holder.
Inventors
- 👤 Yoshinori Tangi
- 👤 Yoshihiro Okano
- 👤 Tsuneo Uwabo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 02:40
CPC Classifications
G; G11; G11B; G11B17/00; G11B17/02; G11B17/04; G11B17/041; G11B17/043; G11B17/0434; G11B5/00; G11B5/48; G11B5/54
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
189 words
A floppy disk drive with a first and second magnetic head having a disk holder with opposing side surfaces and a front and rear end provided in the interior of a chassis and adapted to hold a floppy disk therein comprising: support shafts on the opposing side surfaces and the rear end portion of the disk holder; the chassis having shaft bores therein adapted to receive said support shafts; a slider slidably retained between the disk holder and the chassis, said slider having cam recesses on opposing side walls; pins projecting from the front end portion of said disk holder on the opposing side surfaces and adapted to slide within the cam recesses in said slider; whereby said disk holder is pivoted around said support shafts when said slider is slid between said disk holder and the chassis as a result of said pins riding in the cam recesses and the first magnetic head works with the floppy disk as a result of the sliding action of said slider and the second magnetic head works with the floppy disk as a result of pivoting action of the disk holder.
Claim 2
Dependent Claim
189 words
A floppy disk drive with a first and second magnetic head having a disk holder with opposing side surfaces and a front and rear end provided in the interior of a chassis and adapted to hold a floppy disk therein comprising: support shafts on the opposing side surfaces and the rear end portion of the disk holder; the chassis having shaft bores therein adapted to receive said support shafts; a slider slidably retained between the disk holder and the chassis, said slider having cam recesses on opposing side walls; pins projecting from the front end portion of said disk holder on the opposing side surfaces and adapted to slide within the cam recesses in said slider; whereby said disk holder is pivoted around said support shafts when said slider is slid between said disk holder and the chassis as a result of said pins riding in the cam recesses and the first magnetic head works with the floppy disk as a result of the sliding action of said slider and the second magnetic head works with the floppy disk as a result of pivoting action of the disk holder.
Claim 3
Dependent Claim
55 words
A floppy disk holder as in claim 1 further comprising: first cut and raised portion means, on the rear end and side of said disk holder, for positioning a floppy disk therein; and second cut and raised portion means, on the front of said chassis, for holding a floppy disk therein and preventing ejection thereof.
Claim 4
Dependent Claim
241 words
A floppy disk drive having first and second magnetic head comprising: a chassis; a disk holder having two side surfaces and a front and rear end, said disk holder fitting within said chassis; pivot means, attached to the rear end of said disk holder, said rear end positioned closest to said first and second magnetic heads, for permitting said disk holder to pivot within said chassis about said pivot means; a slider slidably positioned between said disk holder and said chassis, said slider having a cam recess on each side at the end furthest from the first and second magnetic head; a pin on each side of said disk holder adapted to fit and follow within the cam recesses on each side of said slider; spring means, attached to said disk holder and said slider, for biasing said slider forward away from the first and second magnetic heads; and hook means, associated with said slider, for preventing movement of said slider until a floppy disk is inserted into the floppy disk drive, so that when a floppy disk is inserted into said disk holder, said hook means disengages and said slider is moved forward by said spring means causing the front end of said disk holder to be rotated downward by interaction of said pin, the cam recesses, and said pivot means causing the first and second magnetic heads to be placed in position for working with the inserted floppy disk.
Claim 5
Dependent Claim
241 words
A floppy disk drive having first and second magnetic head comprising: a chassis; a disk holder having two side surfaces and a front and rear end, said disk holder fitting within said chassis; pivot means, attached to the rear end of said disk holder, said rear end positioned closest to said first and second magnetic heads, for permitting said disk holder to pivot within said chassis about said pivot means; a slider slidably positioned between said disk holder and said chassis, said slider having a cam recess on each side at the end furthest from the first and second magnetic head; a pin on each side of said disk holder adapted to fit and follow within the cam recesses on each side of said slider; spring means, attached to said disk holder and said slider, for biasing said slider forward away from the first and second magnetic heads; and hook means, associated with said slider, for preventing movement of said slider until a floppy disk is inserted into the floppy disk drive, so that when a floppy disk is inserted into said disk holder, said hook means disengages and said slider is moved forward by said spring means causing the front end of said disk holder to be rotated downward by interaction of said pin, the cam recesses, and said pivot means causing the first and second magnetic heads to be placed in position for working with the inserted floppy disk.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-09-06 | 1997-03-08 | 1997-09-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-09-06 | 2001-03-08 | 2001-09-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-09-06 | 2005-03-08 | 2005-09-07 | $7700.00 | Window Closed / Lapsed |