Resistance regulating balance board

Abstract

A resistance regulating balance board includes a disc body disposed onto a semispherical base. A resistance member is disposed inside the semispherical base. An elastic component and a locking member are disposed inside a containing chamber within the resistance member. A screw rod passes through the disc body, the semispherical base and the elastic component to engage with the locking member so that a user can rotate the screw rod to regulate a resistance value generated between the resistance member and the semispherical base to change the magnitude of motion resistance of the balance board, thereby achieving optimum exercise and balancing effects.

What is claimed is: 
     
         1 . A resistance regulating balance board comprising:
 a disc body, a bottom surface of the disc body defining a first lower arc cavity, a central axis of the disc body having a through hole;   a base, a top semispherical surface of an upper portion of the base inserted into and corresponding to the first lower arc cavity of the disc body, a second lower arc cavity having a concave semispherical shape formed in a central portion of the base, a pivot hole formed in the second lower arc cavity;   a regulating rotary lid, a lodging hole formed in an inner central surface of a lid body of the regulating rotary lid, the lodging hole configured to combine with a screw rod;   a resistance member having a semispherical portion and a hollow tube body extending from an upper end of the resistance member, a surface of the semispherical portion corresponding to the second lower arc cavity of the base, a containing chamber formed inside a central portion of the resistance member, the hollow tube body passing through the pivot hole of the base when the semispherical portion is inserted into the second lower arc cavity; and   a locking member disposed in the containing chamber of the resistance member and accepting the screw rod, an end of the screw rod extending through the hollow tube body from the through hole of the disc body to engage with the locking member, thereby fastening together the disc body, the base and the resistance member.   
     
     
         2 . The resistance regulating balance board of  claim 1 , wherein the lodging hole of the regulating rotary lid has a hexagonal shape configured to engage with a hexagonal head of the screw rod. 
     
     
         3 . The resistance regulating balance board of  claim 1 , wherein the screw rod is molded into the lodging hole of the regulating rotary lid. 
     
     
         4 . The resistance regulating balance board of  claim 1 , wherein the through hole of the disc body has a cross shape, and a top end of the hollow tube body of the resistance member includes a lodging portion having a structure corresponding to the cross shape to engage with the through hole. 
     
     
         5 . The resistance regulating balance board of  claim 1 , wherein the resistance member comprises a flexible material, and when the screw rod engages with the locking member to fasten the resistance member with the base, a friction coefficient between the resistance member and the second lower arc cavity is controlled through rotation of the regulating rotary lid to adjust a fastening tightness degree of the screw rod so as to regulate a magnitude of motion resistance. 
     
     
         6 . The resistance regulating balance board of  claim 1 , wherein the containing chamber of the base includes a first chamber and a second chamber, the first chamber disposed in the hollow tube body and the second chamber disposed below the first chamber, an elastic component is disposed in the second chamber, the screw rod extending past the elastic component, and when the screw rod engages with the locking member, the elastic component is driven to press the resistance member, and a magnitude of motion resistance is regulated by adjusting a friction coefficient between the resistance member and the second lower arc cavity by using the regulating rotary lid to rotate the screw rod. 
     
     
         7 . The resistance regulating balance board of  claim 1 , wherein the semispherical surface of the base comprises a plurality of trenches to contain lubricant. 
     
     
         8 . A resistance regulating balance board comprising:
 a disc body, a bottom surface of the disc body comprising a first lower arc cavity, a central axis of the disc body having a through hole;   a base comprising a semispherical surface configured for corresponding insertion into the first lower arc cavity of the disc body, the base further comprising a second lower arc cavity having concave shape disposed in a central portion of the base, a pivot hole formed through the second lower arc cavity;   a resistance member having a semispherical portion and a hollow tube body is extending from the semispherical portion, an upper surface of the semispherical portion corresponding to the second lower arc cavity of the base, a containing chamber formed inside a central region of the resistance member, the hollow tube body passing through the pivot hole of the base when the semispherical portion is inserted in the second lower arc cavity; and   a locking member disposed in the containing chamber of the resistance member and engaging with a screw rod passing through the hollow tube body from the through hole of the disc body so as to fasten together the disc body, the base and the resistance member.   
     
     
         9 . The resistance regulating balance board of  claim 8 , wherein the resistance member is a flexible material, and a friction coefficient between the resistance member and the second lower arc cavity is controlled via rotation of the regulating rotary lid controlling a tightness of the screw rod so as to regulate a magnitude of motion resistance. 
     
     
         10 . The resistance regulating balance board of  claim 8 , wherein the containing chamber of the base comprises a first chamber and a second chamber, the first chamber disposed in the hollow tube body while the second chamber is disposed below the first chamber, an elastic component disposed in the second chamber, the screw rod extending past the elastic component the, and when the screw rod engages with the locking member, the elastic component is driven to press the resistance member, and rotation of the regulating rotary lid causes rotation of the screw rod, a magnitude of motion resistance being thereby regulated by controlling a friction coefficient between the resistance member and the second lower arc cavity.