Patent US4941140A successfully refreshed from Google Patents.
US4941140A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical disc player
Assignee: Toshiba Corp
•
Filing: 1989-02-07
•
Granted: 1990-07-10
•
Expires: 2009-02-07
Abstract
Abstract An optical disc player for playing optical discs includes a disc compartment for accommodating an optical disc, a disc holding mechanism for holding an optical disc accommodated 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
2026-11-05 15:17
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: 4
Claim 1
Independent Claim
304 words
A turntable elevation apparatus for an optical disc player, said optical disc player including a disc compartment in a main chassis for accommodating an optical disc case, the optical disc case including an optical disc rotatably disposed therein, the apparatus comprising: disc holding means for holding the optical disc accommodated in the disc compartment, said disc holding means including turntable means for removably supporting and rotating an optical disc and clamper means for holding the optical disc to said turntable means, said turntable means having a hold position when the optical disc is held between said clamper means and said turntable means and a release position when the optical disc is released by said clamper means and said turntable means; disc rotation drive means for rotating said turntable means, said disc rotation drive means including a turntable shaft fixed to said turntable means and a motor capable of rotating said turntable shaft, said turntable shaft being translatable along the axis of said turntable shaft to move said turntable means between said hold position and said release position; and elevator means for controllably elevating said turntable means from said release position to said hold position including a cam member rotatably supported on the main chassis including a gear and a rotary cam, a motor capable of engaging said gear for imparting a rotational movement to said cam member, and an elevation member rotatably supported by said main chassis at a rotation point, said elevation member having a first end in sliding engagement with said rotary cam and a second end in rotatable engagement with said turntable shaft, said elevation member rotating about said rotation point as said cam member rotates thus translating said turntable shaft along the axis of said turntable shaft to move said turntable means between said hold position and said release position.
Claim 2
Dependent Claim
304 words
A turntable elevation apparatus for an optical disc player, said optical disc player including a disc compartment in a main chassis for accommodating an optical disc case, the optical disc case including an optical disc rotatably disposed therein, the apparatus comprising: disc holding means for holding the optical disc accommodated in the disc compartment, said disc holding means including turntable means for removably supporting and rotating an optical disc and clamper means for holding the optical disc to said turntable means, said turntable means having a hold position when the optical disc is held between said clamper means and said turntable means and a release position when the optical disc is released by said clamper means and said turntable means; disc rotation drive means for rotating said turntable means, said disc rotation drive means including a turntable shaft fixed to said turntable means and a motor capable of rotating said turntable shaft, said turntable shaft being translatable along the axis of said turntable shaft to move said turntable means between said hold position and said release position; and elevator means for controllably elevating said turntable means from said release position to said hold position including a cam member rotatably supported on the main chassis including a gear and a rotary cam, a motor capable of engaging said gear for imparting a rotational movement to said cam member, and an elevation member rotatably supported by said main chassis at a rotation point, said elevation member having a first end in sliding engagement with said rotary cam and a second end in rotatable engagement with said turntable shaft, said elevation member rotating about said rotation point as said cam member rotates thus translating said turntable shaft along the axis of said turntable shaft to move said turntable means between said hold position and said release position.
Claim 3
Dependent Claim
60 words
An apparatus as recited in claim 1, further including a mode detection switch in mechanical communication with said cam member for outputting a release detection signal and a hold detection signal when said cam member is rotated to thus rotate said elevation member about said rotation point to place said turntable means in said release and said hold positions, respectively.
Claim 4
Dependent Claim
39 words
A turntable elevation apparatus as recited in claim 1, further including a rotor at the end of said turntable shaft distal of said turntable means, said second end of said elevation member being in rotatable engagement with said rotor.
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) | 1993-07-09 | 1994-01-08 | 1994-07-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-07-09 | 1998-01-08 | 1998-07-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-07-09 | 2002-01-08 | 2002-07-10 | $7700.00 | Window Closed / Lapsed |