US2015182833A1PendingUtilityA1

Spring tension control device of boxing trainer

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Assignee: HAPPY STAR SPORTS INDUSTRY CO LTDPriority: Jan 1, 2014Filed: Jan 1, 2014Published: Jul 2, 2015
Est. expiryJan 1, 2034(~7.4 yrs left)· nominal 20-yr term from priority
Inventors:Yao Hu
A63B 69/224A63B 2071/026A63B 2225/09A63B 69/24
49
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Claims

Abstract

A spring tension control device of boxing trainer is disclosed. The boxing trainer includes a base, at least one spring tension control device and a boxing bag, wherein the at least one spring tension control device is connected between the base and the boxing bag, and which is characterized that the at least one spring tension control device includes a rod, a spring, a sleeve, and a bolt; wherein one end of the spring is connected to one end of the rod, the sleeve is movably covered outside the rod or outside the rod and the spring, and one end of the rod adjacent to the sleeve is provide for bolt to be passed through radially, thereby the bolt is against the rod to fasten the sleeve.

Claims

exact text as granted — not AI-modified
What is claimed is: 
     
         1 . A spring tension control device of boxing trainer, the boxing trainer including a base, at least one spring tension control device and a boxing bag, the at least one spring tension control device is connected between the base and the boxing bag, and which is characterized:
 the at least one spring tension control device includes a rod, a spring, a sleeve, and a bolt;   wherein one end of the spring is connected to one end of the rod, the sleeve is movably covered outside the rod or outside the rod and the spring, one end of the rod adjacent to the sleeve is provide for bolt to be passed through radially, thereby the bolt is against the rod to fasten the sleeve.   
     
     
         2 . The device as claimed in  claim 1 , wherein the at least one spring tension control device is a single spring tension control device, one end of the rod far away from the spring is connected to the boxing bag, and one end of the spring far away from the rod is connected to the base. 
     
     
         3 . The device as claimed in  claim 1 , wherein the at least one spring tension control device is two spring tension control devices, the spring of one of the spring tension control device far away from the rod is connected to the base thereof and one end of the rod far away from the spring is connected to the rod of the other spring tension control device, and the spring of one end of the other spring tension control device far away from the rod is connected to the boxing bag thereof.

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