Sound recording playing apparatus with improved vibration plate

Details Sound recording playing apparatus with improved vibration plate Sound recording playing apparatus with improved vibration plate

1991-04-19

1993-01-05

Levy, Stuart S.

Dynamic information storage or retrieval

Dynamic mechanism subsystem

Specific detail of storage medium support or motion production

369 63, 369 65, 369263, 369 751, G11B 1914, G11B 2504

Patent

active

051777339

ABSTRACT:
A casing of a sound record playing apparatus includes an upper body (1B) and a lower body (1A), and a vibration plate (16) is formed by reducing a thickness of a part of the upper body. An inner surface of the vibration plate is in abutment with a pickup (13) to amplify the vibrations of the pickup. Thus, a conical speaker which has been used conventionary can be eliminated, and the thickness of the recording disk reproducing apparatus is reduced.

REFERENCES:
patent: 3740056 (1973-06-01), Nuttall et al.
patent: 4061343 (1977-12-01), Watanabe
patent: 4078807 (1978-03-01), Sherwood
patent: 4150831 (1979-04-01), Watanabe
patent: 4254184 (1981-03-01), Tsukagoshi et al.
patent: 4259550 (1981-03-01), Nakamatsu
patent: 4347595 (1982-08-01), Ngai
patent: 4447898 (1984-05-01), Koike
patent: 4731777 (1988-03-01), Yashitoshi et al.
patent: 4922478 (1990-05-01), Verhagen

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