Swimming assistance apparatus

Abstract

Provided is a swimming assistance apparatus, which is worn on a user's both feet to provide the user with buoyancy, such that the user can float on water and swim in a good swimming style while repeatedly moving the waist from side to side like a fish, thereby reinforcing the user's waist muscles. Persons who have knee joint arthralgia or backache or persons who have disability in the lower body can use the swimming assistance apparatus for medical purposes, such as pain relief or treatment.

What is claimed is: 
     
         1 . A swimming assistance apparatus comprising:
 a body part made of a material which floats on water or having a hollow tube which floats on water;   a fitting hole having a hollow cylinder shape and defined to penetrate through the body part to surround a part of a user's lower body;   a cut part defined on at least one side of a wall of the fitting hole; and   a protrusion part disposed on an inner surface of the fitting hole and protruded in a diameter direction,   wherein the fitting hole comprises a first fitting hole and a second fitting hole configured in such a manner that the user can insert the right and left legs into the first and second fitting holes respectively,   wherein the cut part comprises a first cut part formed in one side wall of the first fitting hole and a second cut part formed in one side wall of the second fitting hole,   wherein when the user swims in a state where a part of the user's lower body is inserted into the fitting hole, the user's lower body floats on water by buoyancy of the body part.   
     
     
         2 . The swimming assistance apparatus as claimed in  claim 1 , wherein an exterior surface of the outer wall of the fitting hole is curved to make a curved surface. 
     
     
         3 . The swimming assistance apparatus as claimed in  claim 1 , wherein the body part is configured to be divided between the first and second fitting holes,
 wherein the swimming assistance apparatus further comprises detachable fixing means formed on each inner face of the divided body part,   wherein the detachable fixing means is one of Velcro tapes, magnets, buttons, male and female coupling parts, hooks and zippers which can attach and detach the first and second fitting holes.   
     
     
         4 . The swimming assistance apparatus as claimed in  claim 1 , wherein the cut part is defined in the outer wall of the fitting hole in the longitudinal direction of the fitting hole to enable the user to easily insert the user's lower body. 
     
     
         5 . The swimming assistance apparatus as claimed in  claim 1 , wherein at least one among the first and second cut parts is respectively formed in the upper side wall of the first fitting hole and the second fitting hole to enable the user to easily put the user's lower body thereon. 
     
     
         6 . The swimming assistance apparatus as claimed in  claim 1 , wherein the first cut part is formed in the upper side wall of the first fitting hole and the second cut part is formed in the lower side wall of the second fitting hole. 
     
     
         7 . The swimming assistance apparatus as claimed in  claim 1 , wherein the protrusion part extends in the longitudinal direction of the fitting hole so as to provide the user's lower body with comfort and enhance fixation power of the user's lower body. 
     
     
         8 . The swimming assistance apparatus as claimed in  claim 1 , wherein the protrusion part is protruded in a semi-spherical shape so as to provide the user's lower body with comfort and enhance fixation power of the user's lower body. 
     
     
         9 . The swimming assistance apparatus as claimed in  claim 1 , wherein the protrusion part extends spirally in the longitudinal direction of the fitting hole so as to provide the user's lower body with comfort and enhance fixation power of the user's lower body. 
     
     
         10 . The swimming assistance apparatus as claimed in  claim 1 , wherein the protrusion part extends spirally so as to provide the user's lower body with comfort and enhance fixation power of the user's lower body. 
     
     
         11 . The swimming assistance apparatus as claimed in  claim 1 , wherein the protrusion part extends and forms a straight line so as to provide the user's lower body with comfort and enhance fixation power of the user's lower body. 
     
     
         12 . The swimming assistance apparatus as claimed in  claim 1 , further comprising at least one among:
 wings defined at both sides of the body part in the longitudinal direction and having a predetermined curvature at the front face, which is the user's advancing direction, in order to reduce underwater resistance; and   at least one fin vertically protruded from at least one of an upper side and a lower side of the middle part of the body part and have a predetermined curvature at the front face, which is the user's advancing direction, in order to reduce underwater resistance.   
     
     
         13 . The swimming assistance apparatus as claimed in  claim 1 , wherein the body part is defined in a flat board shape and the fitting hole is formed to get in contact with one side of the body part,
 wherein the swimming assistance apparatus further comprises,   wings defined at both sides of the body part in the longitudinal direction and having a predetermined curvature at the front face, which is the user's advancing direction, in order to reduce underwater resistance.   
     
     
         14 . The swimming assistance apparatus as claimed in  claim 1 , further comprising:
 a through hole penetrating through the body part and disposed between the first fitting hole and the second fitting hole, so as to reduce underwater resistance generated in the user's advancing direction.   
     
     
         15 . The swimming assistance apparatus as claimed in  claim 1 , further comprising:
 at least one hand-grip depressed in one side of the body part or penetrates through the body part, such that the user can insert at least one finger into the hand-grip to grasp the body part.   
     
     
         16 . The swimming assistance apparatus as claimed in  claim 1 , further comprising at least one of wings and at least one fin:
 the wings defined at both sides of the body part in the longitudinal direction and having a predetermined curvature at the front face, which is the user's advancing direction, in order to reduce underwater resistance; and   at least one fin vertically protruded from at least one of an upper side and a lower side of the middle part of the body part and have a predetermined curvature at the front face, which is the user's advancing direction, in order to reduce underwater resistance, thereby offsetting a rotational force around the user's advancing direction, and   wherein the swimming assistance apparatus further comprises,   at least one hand-grip depressed in one side of the wings or the at least one fin, or having a penetration-hole in one of the wings or the at least one fin, such that the user can insert at least one finger into the hand-grip to grasp the body part.   
     
     
         17 . The swimming assistance apparatus as claimed in  claim 1 , further comprising:
 a plurality of partition walls defined inside the body part maintaining a structure of the body part and resisting a distortion of the body part.   
     
     
         18 . The swimming assistance apparatus as claimed in  claim 17 , wherein the plurality of partition walls cross each other. 
     
     
         19 . The swimming assistance apparatus as claimed in  claim 17 , wherein the plurality of partition walls are connected with one another in a honey comb shape. 
     
     
         20 . The swimming assistance apparatus as claimed in  claim 1 , further comprising:
 separation preventing means disposed at one side of the cut part to close the cut part and preventing the inserted user's lower body from being separated from the cut part.