Disc retaining device for a disc player

Details Disc retaining device for a disc player Disc retaining device for a disc player

1993-05-10

1995-01-03

Heinz, A. J.

Dynamic information storage or retrieval

Dynamic mechanism subsystem

Specific detail of storage medium support or motion production

G11B 2504

Patent

active

053792874

ABSTRACT:
An apparatus (1) for playing a disc-shaped record carrier (2) having a central positioning hole (6) has a turntable (10) which comprises a positioning member (20) which is engageable in the positioning hole (6) and in which a pressure device 130) is arranged, the positioning member (20) having an annular recess (32) and the pressure device (30) comprising a coil spring (33) having turns (34) which project radially from the recess (32) to cooperate with a record carrier (2). The maximum height (H) of the recess (32) is smaller than the outer diameter (D) of the coil spring (33) in its no-load condition before it is mounted in the recess (32), and in the recess (32) the turns (34) of the coil spring (33) are held in an operational inclination condition (B) which is less steep than their comparatively steep no-load inclination condition (A). (FIG. 3)

REFERENCES:
patent: 3817469 (1974-06-01), Mosciatti et al.
patent: 4109878 (1978-08-01), Osawa
patent: 4649532 (1987-03-01), Aldenhoven
patent: 4730300 (1988-03-01), Kamoshita et al.
patent: 4958839 (1990-09-01), Guzik et al.
Search Report.

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