# US 8,752,077 B2 · Optical disc apparatus

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- Number: US 8,752,077 B2
- Document ID: US8752077B2
- Status: Granted
- Kind: B2
- Application number: 13/523,369
- Filed: 2012-06-14
- Published: 2012-12-27
- Granted: 2014-06-10
- Earliest claimed: 2011-06-23
- Assignees: Hitachi-LG Data Storage, Inc.
- Applicants: Seiji Hamaie; Koji Matsumoto; Hideyuki Nagamine
- Inventors: Seiji Hamaie; Koji Matsumoto; Hideyuki Nagamine
- Web page: https://patentgrep.com/patent/US8752077B2

## CPC

- G11B 33/027: {Covers (G11B33/022 takes precedence; with means for guiding the record carrier G11B17/34)}
- G11B 17/0405: {Closing mechanism, e.g. door}
- 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

An example of an optical disc apparatus includes a top case and a bottom case. The top case includes a tab extending downward from one end of the top case. The tab includes a protrusion protruding inward. The bottom case includes a lower-side folded portion formed by folding inward an upper end of one side surface of the bottom case. The lower-side folded portion includes a cantilever spring. The cantilever spring includes a spring portion extending in a vertical direction and a curved portion formed by folding inward an upper part of the spring portion. The protrusion comes into contact with the curved portion when the top case is being affixed to the bottom case and is in contact with the spring portion under a state where the top case is affixed to the bottom case.

## Claims

### Claim 1

An optical disc apparatus, comprising:
a tray on which an optical disc is mountable; and
a case assembly for housing the tray, the case assembly comprising:
a top case for covering an upper surface of the tray; and
a bottom case for covering a lower surface of the tray,
wherein the top case comprises a tab that extends downward from a first end of the top case along a first side surface of the tray and includes a protrusion that protrudes inward,
wherein the bottom case comprises a lower-side folded portion formed by folding inward an upper end of a first side surface of the bottom case, and
wherein the lower-side folded portion comprises a cantilever spring, the cantilever spring comprising:
a spring portion which extends in a vertical direction along the first side surface of the tray and with which the protrusion of the tab is in contact under a state in which the top case is affixed to the bottom case; and
a curved portion which is formed by bending inward an upper part of the spring portion and with which the protrusion comes into contact when the top case is being affixed to the bottom case.

### Claim 2 (depends on 1)

The optical disc apparatus according to claim 1,
wherein the top case further comprises:
a side surface that extends downward from a second end of the top case along a second side surface of the tray; and
a claw portion that extends inward from the side surface of the top case, and
wherein the bottom case further comprises a cutaway portion which is opened on a second side surface of the bottom case and with which the claw portion is engageable.

### Claim 3 (depends on 1)

The optical disc apparatus according to claim 1, wherein the curved portion of the cantilever spring is connected to the lower-side folded portion and a lower end of the cantilever spring is a free end.

### Claim 4 (depends on 1)

The optical disc apparatus according to claim 1, wherein each of the protrusion and the cantilever spring is provided at a position opposed to a widthwise center of the side surface of the top case.