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Patent Searching and Data


Title:
FRICTION DRIVE DEVICE FOR CAPSTAN OF TAPE RECORDER
Document Type and Number:
WIPO Patent Application WO/1984/000590
Kind Code:
A1
Abstract:
A friction drive device for a capstan of a tape recorder has a capstan (4) and a friction wheel (8) for transmitting rotational force when in contact with a flywheel (9), to which the capstan (4) is attached. It also comprises a support mechanism (6), (33), (43), (44) for rotatably supporting the friction wheel (8) about a pivot (61) displaced from the rotational shaft (7) of the friction wheel (8) as a center, and energizing means (67) for rotatably energizing the friction wheel (8) about the pivot (61) as a center in the direction in which it contacts the flywheel (9), thereby providing an initial contact pressure between the friction wheel (8) and the flywheel (9), and also using the reaction at the contact surface due to the rotation of the friction wheel (8) in the direction of rotation of the friction wheel (8) in the same direction as the energizing means (67) to increase the contact pressure between the friction wheel (8) and the flywheel (9) to more than the initial contact pressure when the friction wheel (8) starts to rotate. The mechanism (6), (33), (43), (44) is constructed so as to rotatably support a motor (5) by a pair of support members (35), (61) at the front and rear of the motor (5), thereby supporting the friction wheel (8) mounted on the rotational shaft (7) of the motor (5), and the members (35), (61) are disposed at positions symmetrically displaced along the rotational shaft (7) of the motor (5) in such a manner that the straight line between the members (35) and (61) passes through the centroid of the motor (5), and the motor (5) can not rotate by its own weight about the members (35), (61) as a center.

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Inventors:
IDA MITSURU (JP)
Application Number:
PCT/JP1983/000225
Publication Date:
February 16, 1984
Filing Date:
July 13, 1983
Export Citation:
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Assignee:
SONY CORP (JP)
International Classes:
G11B15/28; F16H13/10; F16H13/14; G11B15/26; (IPC1-7): F16H13/10; G11B15/28
Foreign References:
JPS5036497Y11975-10-24
JPS4111947Y1
Other References:
See also references of EP 0113784A4
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