US4914647A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical disc player
Assignee: Toshiba Corp
•
Filing: 1987-08-25
•
Granted: 1990-04-03
•
Expires: 2007-08-25
Abstract
Abstract An optical disc player for playing optical discs includes a disc compartment for accomodating an optical disc, a disc holding mechanism for holding an optical disc accomodated in the disc compartment, a disc rotation drive mechanism for rotating the optical disc held by the disc holding mechanism, an optical pickup device which is radially movable in respect to the optical disc rotated by the disc rotation drive mechanism for optically tracing the optical disc and a pickup locking mechanism which is responsive to the disc holding mechanism for locking the optical pickup device during a non-operation of the tracing operation.
Inventors
- 👤 Takuro Ono
- 👤 Noboru Aoyama
- 👤 Kaoru Morinaga
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:16
CPC Classifications
G; G11; G11B; G11B19/00; G11B19/20; G11B17/00; G11B17/02; G11B17/04; G11B17/041; G11B17/043; G11B19/02; G11B19/04; G11B19/10; G11B19/14; G11B33/00; G11B33/02; G11B33/08
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
254 words
An optical pickup locking mechanism for an optical disc player, the optical disc player including a disc compartment for accommodating an optical disc, the mechanism comprising: disc holding means for holding the optical disc accommodated in the disc compartment, the disc holding means including a turntable for removably supporting and rotating the optical disc and a clamper for releasably holding the optical disc to said turntable, the disc holding means having a hold position when the optical disc is held by the clamper and the turntable and a release position when the optical disc is released by the clamper and the turntable; optical pickup means for optically reading information stored on the optical disc, the optical pickup means being radially movable relative to the optical disc when the optical disc is disposed on said turntable; optical pickup locking means for locking the optical pickup means in an unmovable state including a first engaging means fixed to said optical pickup means and a second engaging means capable of engaging the first engaging means, the second engaging means being fixed along the direction of movement of the optical pickup means and rotatable to fixedly engage the first engaging means when the disc holding means is in the release position; and lever means for placing the disc holding means and the optical pickup locking means in mechanical communication, the lever means operating the optical pickup locking means to lock the optical pickup means in the unmovable state when the disc holding means is in the release position.
Claim 2
Dependent Claim
254 words
An optical pickup locking mechanism for an optical disc player, the optical disc player including a disc compartment for accommodating an optical disc, the mechanism comprising: disc holding means for holding the optical disc accommodated in the disc compartment, the disc holding means including a turntable for removably supporting and rotating the optical disc and a clamper for releasably holding the optical disc to said turntable, the disc holding means having a hold position when the optical disc is held by the clamper and the turntable and a release position when the optical disc is released by the clamper and the turntable; optical pickup means for optically reading information stored on the optical disc, the optical pickup means being radially movable relative to the optical disc when the optical disc is disposed on said turntable; optical pickup locking means for locking the optical pickup means in an unmovable state including a first engaging means fixed to said optical pickup means and a second engaging means capable of engaging the first engaging means, the second engaging means being fixed along the direction of movement of the optical pickup means and rotatable to fixedly engage the first engaging means when the disc holding means is in the release position; and lever means for placing the disc holding means and the optical pickup locking means in mechanical communication, the lever means operating the optical pickup locking means to lock the optical pickup means in the unmovable state when the disc holding means is in the release position.
Claim 3
Dependent Claim
38 words
The optical disc player of claim 1 wherein the optical pickup means includes an optical pickup and an actuator for moving the optical pickup radially in respect to the optical disc rotated by the disc rotation drive means.
Claim 4
Dependent Claim
16 words
The optical disc player of claim 2 wherein the actuator is a linear drive type motor.
Claim 5
Dependent Claim
19 words
The optical disc player of claim 1 wherein the disc compartment is provided for accomodating a case-packed optical disc.
Claim 6
Dependent Claim
131 words
An optical disc player as claimed in claim 1, further including: disc rotation drive means for rotating the turntable, the rotation drive means including a turntable shaft fixed to the turntable and a motor capable of rotating the turntable shaft, the end of the shaft distal the turntable including a rotor; a second rack shaft disposed parallel to the direction of movement of the optical pickup means and rotatable about an axis of rotation, the second rack being fixed to, and rotatable with, the second rack shaft, the lever means including a rocking lever rotatably connected at one end to the rotor and at the other end through gear means to the second rack shaft, the second rack shaft being rotated by the rocking lever as the turntable shaft moves longitudinally.
Claim 7
Dependent Claim
31 words
An optical disc player as claimed in claim 5 wherein the turntable shaft is moved longitudinally away from the optical disc to place the disc holding means in the release position.
Claim 8
Dependent Claim
33 words
An optical pickup locking mechanism for an optical disc player as claimed in claim 1, wherein said first engaging means is a first rack and said second engaging means is a second rack.
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) | 1993-04-02 | 1993-10-02 | 1994-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-04-02 | 1997-10-02 | 1998-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-04-02 | 2001-10-02 | 2002-04-03 | $7700.00 | Window Closed / Lapsed |