Elastic structure of a sport equipment

Abstract

An elastic structure of a sport equipment comprises a base, a staggered frame, an elastic body and an applying member. The base is supported on a ground. The elastic body is extendable and retractable located on the base. The applying member is connected to the elastic body for generating a stretching movement back and forth. The base and the staggered frame can be foldable, thus the elastic structure of the sport equipment has a smaller volume for collecting and saving.

What is claimed is: 
     
         1 . An elastic structure of a sport equipment, comprising:
 a base supported on a ground;   a staggered frame having a front section, a middle section and a rear section, the middle section having a pivoting portion that pivoted at the base, thus the front section and the rear section extending outward from the pivoting portion, and the front section having an extending socket, and the rear section having a positioning socket;   an elastic body extendably and retractably located on the extending socket and the positioning socket; and   an applying member connected to the elastic body for generating a stretching movement back and forth.   
     
     
         2 . The elastic structure of  claim 1 , further comprising:
 a plurality of the elastic bodies parallel to each other.   
     
     
         3 . The elastic structure of  claim 1 , further comprising:
 a plurality of the applying members, each of the applying members connected to the elastic body.   
     
     
         4 . The elastic structure of  claim 1 , wherein the staggered frame comprises a plurality of rods which are parallel to each other. 
     
     
         5 . The elastic structure of  claim 1  wherein the pivoting portion of the middle section has a pivoting rod and an angle between the staggered frame and the base can be adjusted via the pivoting rod. 
     
     
         6 . The elastic structure of  claim 1  wherein the pivoting portion of the middle section has an open space, and the elastic body is passed through the open space. 
     
     
         7 . The elastic structure of  claim 1 , wherein the elastic body is located between the extending socket and the applying member along a moving direction, and the front section has a first pivoting socket, and the first pivoting socket is pivoted at the front section and the elastic body is passed through the first pivoting socket, and a swing direction of the first pivoting socket is corresponding to the moving direction. 
     
     
         8 . The elastic structure of  claim 7 , wherein the first pivoting socket comprises a first pulley, the first pulley is pivoted at the first pivoting socket, and the elastic body is arranged through the first pulley. 
     
     
         9 . The elastic structure of  claim 8 , wherein an end of the elastic body extends from the first pivoting socket, and the elastic structure further comprises:
 a first connector connected to the end of the elastic body, and detachably connected to the applying member; and   a first pin for connecting the first connector to the elastic body, thus a detachment of the elastic body from the first pivoting socket can be avoided by the first pin.   
     
     
         10 . The elastic structure of  claim 1  wherein the elastic body is located between the positioning socket and the applying member a moving direction, and the rear section has a second pivoting socket, and the second pivoting socket is pivoted at the rear section and the elastic body is passed through the second pivoting socket, and a swing direction of the second pivoting socket is corresponding to the moving direction. 
     
     
         11 . The elastic structure of  claim 10 , wherein the second pivoting socket comprises a second pulley, the second pulley is pivoted at the second pivoting socket, and the elastic body is arranged through the second pulley. 
     
     
         12 . The elastic structure of  claim 11 , wherein an end of the elastic body extends from the second pivoting socket, and the elastic structure further comprises:
 a second connector connected to the end of the elastic body, and detachably connected to the applying member; and   a second pin connected the second connector to the elastic body, thus a detachment of the elastic body from the second pivoting socket can be avoided by the second pin.   
     
     
         13 . An elastic structure of a sport equipment, comprising:
 a base supported on a ground;   a staggered frame having a front section, a middle section and a rear section, the middle section having a pivoting portion that pivoted at the base, thus the staggered frame staggered at an angle with the base to form an X-shape, the pivoting portion that connected to the base to adjust the angle rotatably, and the front section and the rear section extending outward from the pivoting portion, and the front section having an extending socket, and the rear section having a positioning socket;   an elastic body passed through the extending socket and the positioning socket, and the elastic body extendably and retractably located on the extending socket and the positioning socket; and   an applying member connected to an end of the elastic body for generating a stretching movement back and forth.   
     
     
         14 . The elastic structure of  claim 13 , further comprising:
 a plurality of the elastic bodies parallel to each other.   
     
     
         15 . The elastic structure of  claim 13 , further comprising:
 a plurality of the applying member, each of the applying member connected to the elastic body.   
     
     
         16 . The elastic structure of  claim 13 , wherein the staggered frame comprises a plurality of rods which are parallel to each other. 
     
     
         17 . The elastic structure of  claim 13 , wherein the pivoting portion of the middle section has a pivoting rod, and an angle between the staggered frame and the base can be adjusted via the pivoting rod, and another end of the elastic body is curved and reverse direction extending on the base. 
     
     
         18 . The elastic structure of  claim 13 , wherein the pivoting portion of the middle section has an open space, and the elastic body is passed through the open space. 
     
     
         19 . The elastic structure of  claim 13 , wherein the elastic body is located between the extending socket and the applying member along a moving direction, and the front section has a first pivoting socket, and the first pivoting socket is pivoted at the front section and the elastic body is passed through the first pivoting socket, and a swing direction of the first pivoting socket is corresponding to the moving direction. 
     
     
         20 . The elastic structure of  claim 19 , wherein the first pivoting socket comprises a first pulley, the first pulley is pivoted at the first pivoting socket, and the elastic body is arranged through the first pulley. 
     
     
         21 . The elastic structure of  claim 20 , wherein the end of the elastic body extends from the first pivoting socket and the elastic structure further comprises:
 a first connector connected to the end of the elastic body and detachably connected to the applying member; and   a first pin for connecting to the first connector to the elastic body, thus a detachment of the elastic body from the first pivoting socket can be avoided by the first pin.