US4807071A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mechanism for preventing damage to the magnetic head and medium of a magnetic recording/reproducing apparatus during transport
Assignee: Panasonic Holdings Corp
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Filing: 1987-10-13
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Granted: 1989-02-21
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Expires: 2007-10-13
Abstract
Abstract This invention relates to a magnetic recording/reproducing apparatus wherein a power switch is turned on to automatically move a magnetic head in a shipping zone which is formed substantially near the central portion of the magnetic recording medium and which is not subjected to data recording or reproduction, and the power switch is turned off to lock the magnetic head while the magnetic head is held in the shipping zone. One of holes selectively engaged with a projection of a plunger and respectively formed in a lock lever for regulating the magnetic head movement and in a brake lever for regulating rotation of a rotor has a circular shape and the other has an elongated shape. When the plunger is attracted by the solenoid, the lock lever and the brake lever are moved at different timings. A load acting on the solenoid is decreased, so that the solenoid requires a low power and has a compact size.
Inventors
- 👤 Norifumi Kosaka
- 👤 Hiroshi Kobayashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 00:48
CPC Classifications
G; G11; G11B; G11B19/00; G11B19/20; G11B19/22; G11B19/28; G11B5/00; G11B5/48; G11B5/54
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
318 words
A magnetic recording/reproducing apparatus for use with a magnetic medium having a data zone subjected to data recording and reproduction and a shipping zone which is not subjected to data recording or reproduction, said apparatus comprising: magnetic medium driving means for rotating the magnetic medium; a magnetic head; magnetic head moving means for moving the magnetic head along the magnetic medium upon rotation of a motor; control means for controlling the magnetic head moving means to move the magnetic head to the shipping zone when the apparatus is powered and is not performing data recording or reproduction; lock means for locking the magnetic head moving means in the shipping zone upon deenergization of the apparatus; brake means for braking and locking the magnetic medium driving means upon deenergization of the apparatus; said lock means includes a lock lever for locking movement of a rotary member coupled to the motor of the magnetic head moving means and having a hole, and spring means for biasing said lock lever to lock movement of said rotary member; said brake means includes a brake lever for braking movement of the magnetic medium driving means and having a hole, and spring means for biasing said brake lever to brake movement of said rotating means; and said apparatus further includes a plunger having a projection selectively engaged at different positions within at least one of the holes, and a solenoid which is energized to attract the plunger upon energization of the apparatus and which is deenergized to release the plunger upon deenergization of the apparatus, one of the holes being formed to be tightly fitted with the projection of the plunger, the other of the holes being formed to be loosely fitted with the projection of the plunger, whereby the lock lever and the brake lever are started to move at different timings by the plunger when the plunger is attracted by the solenoid.
Claim 2
Dependent Claim
318 words
A magnetic recording/reproducing apparatus for use with a magnetic medium having a data zone subjected to data recording and reproduction and a shipping zone which is not subjected to data recording or reproduction, said apparatus comprising: magnetic medium driving means for rotating the magnetic medium; a magnetic head; magnetic head moving means for moving the magnetic head along the magnetic medium upon rotation of a motor; control means for controlling the magnetic head moving means to move the magnetic head to the shipping zone when the apparatus is powered and is not performing data recording or reproduction; lock means for locking the magnetic head moving means in the shipping zone upon deenergization of the apparatus; brake means for braking and locking the magnetic medium driving means upon deenergization of the apparatus; said lock means includes a lock lever for locking movement of a rotary member coupled to the motor of the magnetic head moving means and having a hole, and spring means for biasing said lock lever to lock movement of said rotary member; said brake means includes a brake lever for braking movement of the magnetic medium driving means and having a hole, and spring means for biasing said brake lever to brake movement of said rotating means; and said apparatus further includes a plunger having a projection selectively engaged at different positions within at least one of the holes, and a solenoid which is energized to attract the plunger upon energization of the apparatus and which is deenergized to release the plunger upon deenergization of the apparatus, one of the holes being formed to be tightly fitted with the projection of the plunger, the other of the holes being formed to be loosely fitted with the projection of the plunger, whereby the lock lever and the brake lever are started to move at different timings by the plunger when the plunger is attracted by the solenoid.
Claim 3
Dependent Claim
42 words
An apparatus according to claim 1, wherein one of said holes comprises a circular hole which is tightly fitted with the projection of the plunger, and the other comprises an elongated hole which is loosely fitted with the projection of the plunger.
Claim 4
Dependent Claim
108 words
An apparatus according to claim 1, wherein said solenoid attracts the lock lever against a biasing force of a respective spring means upon energization of the apparatus and releasing the lock lever upon deenergization of the apparatus; and said rotary member is coaxially mounted on a rotating shaft of the motor of the magnetic head moving means and has a projection extending radially outward therefrom; and further comprising: a stopper engaged with the projection of the rotary member so as to stop the magnetic head in the shipping zone, whereby the stopper and the lock lever clamp the projection of the rotary member when the apparatus is deenergized.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-02-21 | 1992-08-22 | 1993-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-02-21 | 1996-08-22 | 1997-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-02-21 | 2000-08-22 | 2001-02-21 | $7700.00 | Window Closed / Lapsed |