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Exercise Devices

Shake-and-twist-exerciser

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Shake and twist exerciser

Details

Inventors: Shih, Ching-Fu;
Assignee:
Primary Examiner: Reichard; Lynne A.
Assistant Examiner:
Attorney, Agent or Firm: Burns, Doane, Swecker & Mathis, LLP

A body twist exerciser, including a base, a guardrail mounted on the base, a rotatable hollow box-type rotating arm having one end pivoted to a fixed shaft in the center of the base, and a rotary disc rotatably supported by the center part thereof on the free end shaft of the rotating arm. A transmission mechanism is located in the hollow interior of the rotating arm. The transmission mechanism includes a drive sprocket fixed to the free end shaft of the rotating arm and located below the rotary disc. A driven sprocket is spaced-apart from and mounted side by side with this drive sprocket on a revolving shaft approximating the base end inside the rotating arm. A loop-like transmission chain is wound between the drive and driven sprockets and a transmission gear is mounted on the revolving shaft below the driven sprocket. An intermediate gear is rotatably disposed on an intermediate shaft between the fixed shaft and the revolving shaft to be engaged with the transmission gear. A fixed gear disposed on the fixed shaft is engaged with the intermediate gear and works as a sun gear. When the rotary disc revolves, the drive sprocket mounted on the same shaft as the rotary disc by way of the transmission chain and the driven sprocket driving the transmission gear is brought into rotation around the fixed gear through the intermediary of the intermediate gear. This configuration permits the entire rotating arm to rotate in a corresponding direction as the rotary disc.

DETAILED DESCRIPTION In view of the above, the applicant investigated making the rotary disc and the rotating arm (the cross bar) perform related, synchronous and same directional restricted motion, in order to eliminate the arbitrary rotary motion of the known devices and through intensive design has accomplished the present invention.
Accordingly, an object of the present invention is to provide a shake and twist exerciser having a rotary disc and a rotating arm which perform related synchronous restricted motion of constant speed ratio through the linkage of a transmission mechanism, thereby permitting the user to maintain the body in a balanced position facing toward a specified direction and maintaining a center of gravity during exercises.
In addition, the present invention makes the use and control of a twist exerciser easier and enhances safety.
A further object of the present invention is to provide a shake and twist exerciser having a brake device for controlling the rotating speed of the rotating arm, thereby permitting the user to appropriately adjust the rotating arm and further the speed of rotation in the rotary disc in conformance with the user's own exercise conditions.
An additional object of the present invention is to provide a shake and twist exerciser without having to use a waist girdling ring for maintaining the center of gravity of the user's body.

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