Bike trainer

Abstract

A bike trainer includes a base seat unit including an axle member, a swing member including a main body, a first wing portion, and a second wing portion, a shock absorber unit including a first elastic member, and a second elastic member, and an accessory structure connected to the axle member and adapted to provide resistance to an exercise of a user. When the accessory structure swings the axle member rotates and the swing member swings between a left-leaning position and a right-leaning position. When the swing member is in the left-leaning position, the first wing portion compresses the first elastic member to generate a biasing force acting on the swing member in the clockwise direction. When the swing member is in the right-leaning position, the second wing portion compresses the second elastic member to generate a biasing force acting on the swing member in the anti-clockwise direction.

What is claimed is: 
     
         1 . A bike trainer comprising:
 a base seat unit including a first seat body that extends lengthwise in a left-right direction, a second seat body that is connected to said first seat body in a front-rear direction that is perpendicular to the left-right direction, and an axle member that has two opposite ends, that is disposed in said second seat body, that extends away from said second seat body in the front-rear direction along an axis, and that is rotatable relative to said second seat body in an anti-clockwise direction or a clockwise direction;   a swing member including a main body that is non-rotatably connected to one of said opposite ends of said axle member and that is located in said first seat body at a position spaced apart from an inner surface of said first seat body in a top-bottom direction that is perpendicular to the left-right direction and the front-rear direction, a first wing portion that connects said main body and extends away therefrom in the left-right direction, and that is spaced apart from said inner surface of said first seat body in the top-bottom direction, and a second wing portion that connects to said main body and extends therefrom in the left-right direction away from said first wing portion, and that is spaced apart from said inner surface of said first seat body in the top-bottom direction;   a shock absorber unit including a first elastic member that is located between said inner surface of said first seat body and said first wing portion, and a second elastic member that is located between said inner surface of said first seat body and said second wing portion;   an accessory structure that is connected to the other one of said opposite ends of said axle member that is away from said second seat body, and that is adapted to provide resistance to an exercise performed by a user;   wherein, when said accessory structure sways, said axle member alternately rotates leftward and rightward and the swing member swings between a left-leaning position and a right-leaning position relative to said first seat body;   wherein when said swing member is in the left-leaning position, said first wing portion is closer to said inner surface of said first seat body than said second wing portion, and said first wing portion compresses said first elastic member to generate a biasing force acting on said swing member in the clockwise direction; and   wherein when said swing member is in the right-leaning position, said second wing portion is closer to said inner surface of said first seat body than said first wing portion, and said second wing portion compresses said second elastic member to generate a biasing force acting on said swing member in the anti-clockwise direction.   
     
     
         2 . The bike trainer as claimed in  claim 1 , wherein:
 said first elastic member is fastened to said first wing portion and said first seat body, and said second elastic member is fastened to said second wing portion and said first seat body;   when said swing member is in the left-leaning position, said second wing portion is distal to said inner surface of said first seat body and stretches said second elastic member, said second elastic member generating a clockwise biasing force that acts on said swing member; and   when said swing member is in the right-leaning position, said first wing portion is distal to said inner surface of said first seat body and stretches said first elastic member, said first elastic member generating an anti-clockwise biasing force that acts on said swing member.   
     
     
         3 . The bike trainer as claimed in  claim 1 , wherein said inner surface of said first seat body is located below said first elastic member and said second elastic member. 
     
     
         4 . The bike trainer as claimed in  claim 1 , wherein said second seat body is in front of the first seat body. 
     
     
         5 . The bike trainer as claimed in  claim 4 , wherein:
 said second seat body has a through hole that has an inner surface;   said base seat unit further including a bushing unit sleeved on said axle member and mounted in said through hole; and   said axle member has an axle body portion that is connected to said accessory structure, and that is in rotatable contact with said bushing unit, and an axle end portion that extends from said axle body portion away from said accessory structure, and that is non-rotatably connected to said main body of said swing member.   
     
     
         6 . The bike trainer as claimed in  claim 5 , wherein:
 said bushing unit has a first sleeve portion that is press fitted to said inner surface of said through hole of said second seat body, and a second sleeve portion that is aligned with said first sleeve portion in the front-rear direction and abutting against one end of said first sleeve portion proximate to said first seat body, and that is in rotatable contact with said inner surface of said through hole of said second seat body; and   said axle body portion of said axle member is in rotatable contact with said first sleeve portion and said second sleeve portion.   
     
     
         7 . The bike trainer as claimed in  claim 5 , wherein:
 said main body of said swing member has an axle hole having an inner periphery surface that surrounds said axis, and a key groove indenting from said inner periphery surface of said axle hole and extending in the front-rear direction;   said axle end portion of said axle member is press fitted into said axle hole of said main body;   said axle member further has a key that radially protrudes from said axle end portion and extends in the front-rear direction, and that is engaged with said key groove of said main body.   
     
     
         8 . The bike trainer as claimed in  claim 1 , wherein:
 said first seat body has a first tapped hole in the top-bottom direction that is opened toward said first elastic member, and a second tapped hole in the top-bottom direction that is opened toward said second elastic member;   said first elastic member having a first elastic body, a first connecting section that is connected to said first elastic body, and that abuts against said first wing portion, and a first threaded rod portion that is connected a side of said first elastic body opposite to said first wing portion, and that is threadedly secured to said first tapped hole;   said second elastic member having a second elastic body, a second connecting section that is connected to said second elastic body, and that abuts against said second wing portion, and a second threaded portion that is connected to a side of said second elastic body opposite to said second wing portion, and that is threadedly secured to said second tapped hole;   said first wing portion has a first hole that passes through said first wing portion in the top-bottom direction, and that faces said first connecting section, said second wing portion having a second hole that passes through said second wing portion in the top-bottom direction, and that faces said second connecting section; and   said shock absorber unit further including two securing screws that respectively pass through said first hole and said second hole, and that are respectively screwed into said first connecting section and said second connecting section.   
     
     
         9 . The bake trainer as claimed in  claim 1 , wherein:
 said base seat unit including two support rods that are disposed on two opposite sides of said accessory structure, said support rods respectively having pivot ends that are pivotally and respectively connected to two opposite ends of said second seat body that are opposite to each other in the left-right direction, and free ends that are opposite to said pivot ends;   said two support rods are movable between an unfolded position where said free ends of said support rods are distal to said accessory structure and a folded position where said free ends of said support rods are proximate to said accessory structure.   
     
     
         10 . The bike trainer as claimed in  claim 1 , wherein when said swing member is in a balanced position, said first wing portion and said second wing portion are equidistant to said inner surface of said first seat body, and said first wing portion and said second wing portion respectively do not compress the first elastic member and the second elastic member. 
     
     
         11 . The bike trainer as claimed in  claim 1 , wherein:
 said accessory structure includes
 a mounting bar that is hollow and that extends in the front-rear direction, 
 a resistance unit mounted on said mounting bar, and 
 a freewheel unit coupled with said resistance unit and having a wheel shaft adapted for attachment to a rear frame of a bicycle; 
   said base seat unit further includes a main support board disposed beneath and fixed to said first seat body and said second seat body, said first seat body and said second seat body being disposed in front of said first seat body; and   said axle body portion has a connection section extending forwardly from the second seat body and non-rotatably immovably inserted into said mounting bar.