US 6,208,613 B1Granted

Disk player with disk chucking device

AssigneeSony Corporation

InventorGenichi Iizuka

Life of this patent

Estimating the term…

Loading patent…

Abstract

A disk chucking device for use in a disk player, in which the supporting shafts of clamping members are held in holding portions of a hinge provided on the top-surface side of a turntable in such a manner as to be coaxial with a cylinder and to slide along therewith, so that each of the supporting shafts is in opposed contact with the inner side surface of a center boss and a corresponding cam provided thereabove. Moreover, the clamping members, each of which has a chuck end portion formed on the top end thereof, are adapted to be able to vertically slide and radially swing. The clamping members are pushed by first and second spring members in the downward direction and in the direction of the outer circumference of a disk. When a disk installed in the device is detached therefrom, the clamping members are raised. Pins attached to the clamping members abut against the cams provided in the center boss. Then, the clamping members are inwardly tilted. Thus, the disk is detached from the device. Subsequently, the clamping members automatically return to initial positions thereof.

Claims19

Dependent claims

A disk player having a disk chucking device, comprising:

a turntable onto which a disk is placed;
a centering member connected to a shaft member attached to a top surface of said turntable and adapted to engage a central hole of said disk;
a plurality of clamping members, disposed on an intervening portion between outer and inner edges of said turntable at a predetermined angular interval, for pushing against said turntable an inner edge portion of said disk surrounding said central hole;
a cam member provided above each of said plurality of clamping members so that the cam member is in opposed contact with a corresponding clamping member when the disk is detached from the disk chucking device;
spring means for pushing said plurality of clamping members in a downward direction and in a direction of an outer circumference of said disk;
and
holding means for holding said plurality of clamping members so that the plurality of clamping members are slidably engaged in a direction perpendicular to a surface of said turntable and swingably engaged in a direction of a radius of said turntable,
wherein a projection portion having inclined upper and lower surfaces is formed at a the top portion of each of said plurality of clamping members so that the projection portion projects in the direction of the outer circumference of said disk so that said inner edge portion surrounding the central hole is pushed by the inclined lower surface,
wherein an opposed contact portion is formed at an upper portion of each of said plurality of clamping members so that the opposed contact portion is in opposed contact with both [of] said cam member and said centering member;
wherein a supporting shaft to be held by said holding member is provided at a lower portion of each of said plurality of clamping members, and
wherein a cylindrical portion is formed in a central portion of said holding means so that the cylindrical portion is slidably engaged on said shaft member.

8 more elements

A disk player having a disk chucking device, comprising:

a turntable onto which a disk is placed;
a centering member connected to a shaft member attached to a top surface of said turntable and adapted to engage a central hole of said disk;
a plurality of clamping members, disposed on an intervening portion between outer and inner edges of said turntable at a predetermined angular interval, for pushing against said turntable an inner edge portion of said disk surrounding said central hole;
a cam member provided above each of said plurality of clamping members so that the cam member is in opposed contact with a corresponding clamping member when the disk is detached from the disk chucking device;
spring means for pushing said plurality of clamping members in a downward direction and in a direction of an outer circumference of said disk;
and
holding means for holding said plurality of clamping members so that the plurality of clamping members are slidably engaged in a direction perpendicular to a surface of said turntable and swingably engaged in a direction of a radius of said turntable,
wherein a projection portion having inclined upper and lower surfaces is formed at a top portion of each of said plurality of clamping members so that the projection portion projects in the direction of the outer circumference of said disk so that said inner edge portion surrounding the central hole is pushed by the inclined lower surface,
wherein an opposed contact portion is formed at an upper portion of each of said plurality of clamping members so that the opposed contact portion is in opposed contact with both said cam member and said centering member, and
wherein a cylindrical portion is formed in a central portion of said holding means so that the cylindrical portion is slidably engaged on said shaft member.

7 more elements

Dependencies are inferred from the claim text.