# US 7,411,874 B2 · Recording and/or playback device

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 7,411,874 B2
- Document ID: US7411874B2
- Status: Granted
- Kind: B2
- Application number: 11/690,868
- Filed: 2007-03-26
- Published: 2007-07-12
- Granted: 2008-08-12
- Earliest claimed: 2003-01-31
- Assignees: Sony Corporation
- Inventors: Kiyoshi Omori; Hidehiko Yamamoto; Masazumi Shiozawa; Hitoshi Taniguchi; Kazuya Sunami; Hiroshi Kawashima
- Web page: https://patentgrep.com/patent/US7411874B2

## CPC

- G11B 7/082: {Aligning the head or the light source relative to the record carrier otherwise than during transducing, e.g. adjusting tilt set screw during assembly of head}
- G11B 17/056: with sliding loading means
- G11B: INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER (recording measured values in a way that does not require playback through a transducer G01D9/00; recording or playback apparatus using mechanically marked tape, e.g. punched paper tape, or using unit records, e.g. punched or magnetically marked cards G06K; transferring data from one type of record carrier to another G06K1/18; circuits for coupling output of reproducer to radio receiver H04B1/20; gramophone pick-ups or like acoustic electromechanical transducers or circuits therefor H04R)

## Abstract

A disk recorder/player (1) including a skew adjusting means of a thin design is provided which includes a base (101), a disk rotation driving mechanism (102) for an optical disk (4), an optical pickup (103), first and second guide shafts (105, 106) to support the optical pickup (103) at opposite ends of the latter, an optical pickup moving means (104) guided by the first and second guide shafts (105, 106) in moving the optical pickup (103) radially of the optical disk (4), an elastic member (126) put in contact with the first and second guide shafts (105, 106) to force the first and second guide shafts (105, 106) in a direction generally perpendicular to the main side of the optical disk (4), an adjusting screw (127) put into contact with the first and second guide shafts (105, 106) from the opposite side of the elastic member (126) to move the first and second guide shafts (105, 106) in a direction opposite to the direction of forcing by the elastic member (126), and a skew adjusting means (109) which adjusts a skew, if any, by adjusting the inclination of the first and second guide shafts (105, 106) by the adjusting screw (127).

## Claims

### Claim 1

A recording and/or playback apparatus comprising:
a pickup chassis having provided thereon an optical pickup, pickup moving mechanism and a disk rotation driving mechanism;
a cover member having formed therein an opening through which the pickup and disk table face the recording surface of a disk-shaped recording medium and which is connected to the pickup chassis to form a part of a concavity in which the disk-shaped recording medium is to be received; and
a disk tray having formed therein the disk-shaped recording medium receiving concavity, generally circular, and having formed therein an opening through which the cover member faces directly the recording surface of the disk-shaped recording medium and which is closed by the cover member when the latter is connected to the pickup chassis,
the pickup chassis, cover member and disk tray being formed from materials different in coefficient of thermal expansion from each other;
the disk tray having a projection provided on a wall provided at the outer-circumferential side of the concavity and extending to above the opening to maintain a clearance between the outer-circumferential wall and the cover member which closes the opening.

### Claim 2 (depends on 1)

The apparatus as set forth in claim 1, wherein:
the pickup chassis is formed from iron;
the cover member is formed from aluminum or stainless steel; and
the disk tray is formed from PPE (polyphenylene ether).