EP0197159A1
Expired / Lapsed
EP
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Optical disc player
Assignee: Sony Corp
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Filing: 1985-10-09
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Granted: —
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Expires: 2005-10-09
Abstract
Abstract 57 In an optical disc player, a movable chassis (2a), to which an optical pickup (6) and a turntable (3a) are fixed, is supported at a plurality of portions thereof on a frame (1) by coiled springs. This optical disc player is provided with dampers (11) between the frame (1) and movable chassis (2a) so as to absorb the vibration of the movable chassis (2a), and a correcting energizing means (17), which consists of a coild spring or the like, and which is capable of varying by a regulating operation the force for energizing the movable chassis (2a) against the frame (1). Owing to this arrangement, a rising part of a Q-value in a resonance region becomes small, and the vibration resistance of the disc player is improved, so that the sound skipping rarely occurs. It also becomes possible to effectively prevent the deterioration of the vibrations-preventing characteristics of the dampers (11), and the collision of the frame (1) and movable chassis (2a) without widening the range of movement of the chassis (2a).
Inventors
- 👤 You Sony Corporation Yoshitoshi
- 👤 Tsutomu Sony Corporation Toyoguchi
- 👤 Ryoji Sony Corporation Takamatsu
- 👤 Yoshiro Sony Corporation Watanabe
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-06 11:57
CPC Classifications
G; G11; G11B; G11B7/00; G11B25/00; G11B25/04; G11B25/043; F; F16; F16F; F16F9/00; F16F9/10; F16F9/103; G11B17/00; G11B17/02; G11B17/04; G11B33/00; G11B33/02; G11B33/08
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
179 words
An optical disk player in which a movable chassis (2a) mounted with an optical pickup (6), a turntable (3a) and the like is supported by coiled springs (10) joined with respective positions in a frame (1) so as to hold the movable chassis (2a) in a floating state with respect to the player, comprising dampers (11) inserted between said frame (1) and said movable chassis (2a) so as to absorb the energy of vibrations of said movable chassis (2a), and correcting means (17) inserted between said frame (1) and said movable chassis (2a) so as to be able to change a biasing force for biasing said movable chassis (2a) with respect to said frame (1) by adjustment operation, wherein a positional deviation of said movable chassis (2a) due to the setting angle of said frame (1) from the neutral equilibrium position with respect to said frame (1) is corrected by changing the biasing force by adjustment operation, so that said movable chassis (2a) is kept in said neutral equilibrium position regardless of the setting angle of said frame (1).
Claim 2
Dependent Claim
179 words
An optical disk player in which a movable chassis (2a) mounted with an optical pickup (6), a turntable (3a) and the like is supported by coiled springs (10) joined with respective positions in a frame (1) so as to hold the movable chassis (2a) in a floating state with respect to the player, comprising dampers (11) inserted between said frame (1) and said movable chassis (2a) so as to absorb the energy of vibrations of said movable chassis (2a), and correcting means (17) inserted between said frame (1) and said movable chassis (2a) so as to be able to change a biasing force for biasing said movable chassis (2a) with respect to said frame (1) by adjustment operation, wherein a positional deviation of said movable chassis (2a) due to the setting angle of said frame (1) from the neutral equilibrium position with respect to said frame (1) is corrected by changing the biasing force by adjustment operation, so that said movable chassis (2a) is kept in said neutral equilibrium position regardless of the setting angle of said frame (1).
Claim 3
Dependent Claim
26 words
The optical disk player according to claim 1, characterized in that said movable chassis (2a) is suspended from said frame (1) by said coiled springs (10).
Claim 4
Dependent Claim
65 words
The optical disk player according to claim 1 or 2, characterized in that said frame (1) comprises a pair of side plates (7) and a connecting member (8) by which said pair of side plates (7) are connected with each other, said connecting member (8) being provided with adjusting means (18) capable of changing the biasing force of said correcting means (17) by adjustment operation.
Claim 5
Dependent Claim
24 words
The optical disk player according to any one of claims 1 to 3, characterized in that said correcting means is a coiled spring (17).
Claim 6
Dependent Claim
24 words
The optical disk player according to any one of clams 1 to 4, characterized in that said adjusting means is an eccentric cam (18).
Claim 7
Dependent Claim
24 words
The optical disk player according to any one of clams 1 to 4, characterized in that said adjusting means is an eccentric cam (18).
Claim 8
Dependent Claim
47 words
The optical disk player according to any one of cairns 1 to 5, characterized in that said frame (1) is accommodated in a cabinet (30), in the upper wall of which an opening (33) for adjustment operation is formed in order to operate said adjusting means (18).
Claim 9
Dependent Claim
47 words
The optical disk player according to any one of cairns 1 to 5, characterized in that said frame (1) is accommodated in a cabinet (30), in the upper wall of which an opening (33) for adjustment operation is formed in order to operate said adjusting means (18).
Claim 10
Dependent Claim
188 words
The optical disk player according to any one of claims 1 to 6, characterized in that said damper (11) comprises a vessel (11a) of elastic material, a viscous fluid sealed in a space (40) defined by said vessel (11a), and a movable rod (11b) coupled to said vessel (11a), said vessel (11a) and said movable rod (11b) being mounted in one and the other of said frame (1) and said movable chassis (2a), repectively, said vessel (11a) being provided with a movable prism-like portion (41) projected into said space (40), a thick ring-shaped stopper (44) spaced apart from the periphery of said movable portion (41), and a film-like connecting portion (49) formed between said stopper (44) and said movable portion (41), said ring-shaped stopper (44) being provided with an abutting surface in opposed relation to a first abutting surface formed on said other of the frame (1) and the movable chassis (2a), a ring-like groove (50) being formed between said stopper (44) and said connecting portion (49) in opposed relation to the first abutting surface, and said movable rod (11b) being fitted in said movable prism-like portion (41).
Claim 11
Dependent Claim
22 words
The optical disk player according to any one of claims 1 to 7, characterized in that said viscous fluid is silicone oil.
References Cited (Backward Citations)
No citation records indexed.
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