# US 8,752,080 B2 · Turntable having elastic layer with high contact pressure portion

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- Number: US 8,752,080 B2
- Document ID: US8752080B2
- Status: Granted
- Kind: B2
- Application number: 13/808,385
- Filed: 2012-01-19
- Published: 2013-05-02
- Granted: 2014-06-10
- Earliest claimed: 2011-02-15
- Assignees: Panasonic Corporation
- Applicants: Teruyuki Naka; Shinichi Maeda; Yuji Ariyoshi; Masuo Maruyama; Hiroshi Takahashi
- Inventors: Teruyuki Naka; Shinichi Maeda; Yuji Ariyoshi; Masuo Maruyama; Hiroshi Takahashi
- Web page: https://patentgrep.com/patent/US8752080B2

## CPC

- G11B 17/0284: {by clampers}
- G11B 17/0282: {by means provided on the turntable}
- 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

Provided is a turntable for rotatably supporting a disc member on a disc support surface in a state where the disc member is sandwiched and held between the turntable and a clamp member placed opposite thereto, wherein the disc support surface is provided with an elastic layer having a predetermined width, and configured to project from the disc support surface, and at least one of an outer peripheral part and an inner peripheral part of the elastic layer is provided with a high contact pressure portion of which a contact pressure generated by pressing the clamp member thereto is higher than that of other portion.

## Claims

### Claim 1

A turntable for rotatably supporting a disc member on a disc support surface in a state where the disc member is sandwiched and held between the turntable and a clamp member placed opposite thereto, wherein
the disc support surface is provided with an elastic layer having a predetermined width, and configured to project from the disc support surface,
at least one of an outer peripheral part and an inner peripheral part of the elastic layer is provided with a high contact pressure portion of which a contact pressure generated by pressing the clamp member thereto is higher than that of any portion of the elastic layer other than the high contact pressure portion,
the high contact pressure portion is formed by an edge portion projecting to form a predetermined angle in a vertical cross section which cuts across the disc support surface in its radial direction, and
an inclination angle of an upper surface of the elastic layer is from about 0.5° to about 45°.

### Claim 2 (depends on 1)

The turntable according to claim 1, wherein the high contact pressure portion is provided with a notch which opens to a periphery side of the turntable as viewed from above.

### Claim 3 (depends on 1)

The turntable according to claim 1, wherein the high contact pressure portion is formed by cutting work after the elastic layer is fixed onto the disc support surface.

### Claim 4 (depends on 2)

The turntable according to claim 2, wherein the high contact pressure portion is formed by cutting work after the elastic layer is fixed onto the disc support surface.

### Claim 5 (depends on 1)

The turntable according to claim 1, wherein an inclination angle of an upper surface of the elastic layer is from about 1° to about 10°.

### Claim 6 (depends on 1)

The turntable according to claim 1, wherein the high contact pressure portion is configured such that the contact pressure applied to the high contact pressure portion causes the high contact pressure portion to deform and increase a contact area of an upper surface of the elastic layer.