Low noise wrist strength training ball

Abstract

A low noise wrist strength training ball includes a case, a sleeve ring, a rotary body and a magnetic element. The sleeve ring is slidably disposed inside the case and is adapted for sliding relative to the case. The rotary body includes two protruding shafts opposite to each other. The two protruding shafts are pivotally connected to the sleeve ring and are adapted for rotating relative to the sleeve ring. The magnetic element is disposed in the sleeve ring and corresponds to one of the two protruding shafts. The magnetic element is adapted for magnetically attracting the one of the protruding shafts to press against the sleeve ring.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS[0001]This non-provisional application claims priority under 35 U.S.C. §119(a) on Patent Application No(s). 101223608 filed in Taiwan, R.O.C. on Dec. 5, 2012, the entire contents of which are hereby incorporated by reference.BACKGROUND[0002]1. Technical Field[0003]The disclosure relates to a wrist strength training ball, and more particularly to a low noise wrist strength training ball.[0004]2. Related Art[0005]A wrist strength training ball that applies gyroscopic principles and mechanical means can be used to make the wrist strength training ball rotate. Users can hold the wrist strength training ball in the palm of their hand and rotate the wrist strength training ball. A large rotating force is produced by the effects of centrifugal force and inertia force. Therefore, the hand and shoulder muscles can be trained by the rotating force.[0006]Conventional wrist strength training balls require a starting device to provide the wrist strength tra...

AI Technical Summary

Benefits of technology

This patent describes different versions of a low noise wrist strength training ball. The ball has a case, a sleeve ring, a rotary body, and a magnetic element or a shock damping component. The sleeve ring is slidably disposed inside the case and can slide relative to the case. The rotary body has two protruding shafts opposite to each other. The magnetic element or the shock damping component is located in the sleeve ring and can magnetically or pneumatically attract the protruding shafts to press against the sleeve ring or the shock damping component. The patent also describes a case with concave portions that form an annular groove for the sleeve ring to slide in. The technical effects of this invention include reducing noise and improving the training effectiveness and comfort of the wrist strength training device.

Problems solved by technology

The users will not be able to operate the wrist strength training balls when the starting devices are lost.

Nevertheless, the changes on the structure and disposition of the wrist strength training ball will cause the wrist strength training ball to produce unexpected noise during operation.

The users may give up on muscle training because of the unexpected noise.

As a result, it will be less desirable for the users to purchase the wrist strength training ball.

Images