Air supply device of shoes with retractable wheels

Abstract

An air supply device of a wheel-mounted shoe which can supply ambient air into the interior of the shoe by continuously suck the ambient air in by use of the rotating force of the frictional roller interposed between adjacent ones of the wheels rotatably mounted to the bracket of the outer sole of the shoe, irrespective of the rotating direction of the wheels. Accordingly, the air supply device eliminates uncomfortableness caused by sweat and odor generated from the user in the interior of the shoe, to maintain the interior of the shoe in a pleasant state, thereby helping the user's foot health.

1 . An air supply device of a wheel-mounted shoe comprising: 
 a fixed plate mounted to a lower surface of a top plate portion of a bracket fixed to an outer sole of the wheel-mounted shoe by fixing members;    a housing coupled to the fixed plate such that the housing is vertically movable while being elastically supported by an elastic member;    a frictional roller rotatably coupled to the housing by a shaft such that the frictional roller is in close contact with a circumferential surface of at least one of wheels rotatably mounted to the bracket;    air sucking means to suck ambient air in when the frictional roller rotates; and    air ventilation means to supply the air sucked in by the air sucking means into the interior of the shoe.    
   
   
       2 . The air supply device according to  claim 1 , wherein the fixed plate has a guide member formed at a lower surface of the fixed plate, the guide member having a pair of legs defining a recess therein so that the guide member is coupled with the housing.  
   
   
       3 . The air supply device according to  claim 2 , wherein the legs of the guide member are provided with stoppers formed at respective lower ends of the legs to prevent the housing coupled to the guide member from being separated from the guide member.  
   
   
       4 . The air supply device according to  claim 1 , wherein a spring is interposed between the fixed plate and the housing.  
   
   
       5 . The air supply device according to  claim 4 , wherein the housing has a flange formed at a peripheral edge of an upper end of the housing to prevent the housing from being separated from the guide member in a state of being coupled with the guide member, and a spring receiving recess formed at an upper portion of the housing to receive the spring.  
   
   
       6 . The air supply device according to  claim 1 , wherein the housing has a roller receiving hole centrally formed at a lower portion of the housing to receive the frictional roller such that the frictional roller is fitted around the shaft in the roller receiving hole.  
   
   
       7 . The air supply device according to  claim 1 , wherein the air sucking means is arranged at opposite sides of the lower portion of the housing to suck ambient air in when the frictional roller rotates.  
   
   
       8 . The air supply device according to  claim 1 , wherein the air sucking means comprises: 
 two sets of blades mounted to opposite ends of the shaft, respectively;    casings provided at the lower portion of the housing to circumferentially surround respective sets of the blades; and    caps fitted around respective outer ends of the casings.    
   
   
       9 . The air supply device according to  claim 8 , wherein an air outlet is formed at a portion of a circumferential wall of each casing to discharge air sucked into the casing in accordance with rotation of the blades received in the casing.  
   
   
       10 . The air supply device according to  claim 8 , wherein an air inlet is formed at a central portion of each cap to allow ambient air to be sucked into the interior of an associated one of the casings in accordance with the rotation of the blades received in the associated casing.  
   
   
       11 . The air supply device according to  claim 8 , wherein the sets of the blades are mounted to respective ends of the shaft such that the blade sets rotate in opposite directions, respectively.  
   
   
       12 . The air supply device according to  claim 8 , wherein the air ventilation means comprises: 
 first connecting members respectively connected to the air outlets of the casings provided at the lower portion of the housing;    air tubes respectively connected to the first connecting members;    a second connecting member connected to the air tubes to unify air flows respectively discharged from the air tubes; and    an air supply tube connected to the second connecting member to communicate the second connecting member and the interior of the shoe, and thus, to supply the air discharged from the second connecting member into the interior of the shoe.    
   
   
       13 . The air supply device according to  claim 12 , wherein each of the first connecting members has a cylindrical tube structure in which a central portion of the structure has a diameter smaller than opposite ends of the structure.  
   
   
       14 . The air supply device according to  claim 12 , wherein the second connecting member includes branched tubes forming one portion of the second connecting member to be connected with the air tubes, respectively, and a unified tube forming the other portion of the second connecting member to unify air flows respectively discharged from the air tubes and then to discharge the unified air into the air supply tube.  
   
   
       15 . The air supply device according to  claim 14 , wherein a cut-off valve is mounted in the second connecting member such that the cut-off valve is hingable about a hinge to selectively open one of the branched tubes while closing the other branched tube.  
   
   
       16 . The air supply device according to  claim 15 , wherein the hinging operation of the cut-off valve about the hinge is achieved by air discharged from one of the air tubes.  
   
   
       17 . The air supply device according to  claim 15 , wherein a stopper is provided at each branched tube to limit a hinging angle of the cut-off valve.  
   
   
       18 . The air supply device according to  claim 1 , wherein the frictional roller is interposed between adjacent ones of the wheels rotatably mounted to the bracket.  
   
   
       19 . An air supply device of a wheel-mounted shoe comprising: 
 a fixed plate mounted to a lower surface of a top plate portion of a bracket fixed to an outer sole of the wheel-mounted shoe by fixing members, and provided with a pair of guide rods respectively mounted with springs;    a moving plate elastically mounted to the fixed plate in a state of being fitted around the guide rods such that the moving plate is vertically movable, the moving plate being provided with a freely-rotatable hollow shaft mounted to a lower portion of the moving plate;    a frictional roller fixedly mounted on the shaft such that the frictional roller is in close contact with a circumferential surface of at least one of wheels rotatably mounted to the bracket;    air sucking means to suck ambient air in when the frictional roller rotates; and    air ventilation means to supply the air sucked in by the air sucking means into the interior of the shoe through the shaft.    
   
   
       20 . The air supply device according to  claim 19 , wherein the air sucking means comprises a casing formed at a portion of a circumferential surface of the shaft positioned in a recess formed at the frictional roller, and provided with an air inlet.  
   
   
       21 . The air supply device according to  claim 19 , wherein the air sucking means comprises a casing formed at one end of the shaft, and provided with an air inlet.  
   
   
       22 . The air supply device according to  claim 19 , wherein the air ventilation means comprises: 
 a through hole formed at the shaft to communicate with the air sucking means;    an air passage defined in the shaft to communicate with the air sucking means via the through hole;    a box-shaped connector provided at one end of the shaft, and connected with the air passage at one side wall of the connector; and    an elongated tube connected to a top wall of the connector while extending to the interior of the shoe through the outer sole of the shoe to supply, into the interior of the shoe, air introduced into the connector.    
   
   
       23 . The air supply device according to  claim 22 , wherein seal members are fitted around an end of the shaft and an end of the elongated tube connected with the connector, while being retained by support plates mounted to the connector, respectively, to prevent leakage of air.  
   
   
       24 . The air supply device according to  claim 23 , wherein a cut-off valve is mounted between the connector and the elongated tube to forcibly cut off flow of air.