Jigsaw puzzle board turntable

Abstract

A jigsaw puzzle board turntable is provided, including an outer race that is annular and an inner race fitted within the outer race. The outer race and the inner race are rotatably connected to each other through balls snap-fitted between the outer race and the inner race. The balls are snap-fitted within an annular track arranged between the outer race and the inner race, in which the annular track is defined by a side of the outer race facing a center and a side of the inner race facing away from the center. The outer race is provided with ball installation holes to facilitate insertion and removal of the balls. The present disclosure solves the problems of complicated jigsaw puzzle board support structures, poor stability, poor rotation performance, and inconvenient assembly and disassembly.

What is claimed is: 
     
         1 . A jigsaw puzzle board turntable, comprising an outer race ( 110 ) that is annular and an inner race ( 200 ) fitted within the outer race ( 110 ), wherein the outer race ( 110 ) is embedded in a circular recess ( 70 ) at a bottom of a board body ( 2 );
 the outer race ( 110 ) and the inner race ( 200 ) are rotatably connected to each other through balls ( 4 ) snap-fitted between the outer race ( 110 ) and the inner race ( 200 );   the balls ( 4 ) are snap-fitted within an annular track arranged between the outer race ( 110 ) and the inner race ( 200 ), the annular track is defined by a side of the outer race ( 110 ) facing a center and a side of the inner race ( 200 ) facing away from the center; and   the outer race ( 110 ) is provided with ball installation holes to facilitate insertion and removal of the balls ( 4 ).   
     
     
         2 . The jigsaw puzzle board turntable according to  claim 1 , wherein an outer diameter of the inner race ( 200 ) is not greater than an inner diameter of the outer race ( 110 ), and a thickness of the inner race ( 200 ) is equal to a thickness of the outer race ( 110 ). 
     
     
         3 . The jigsaw puzzle board turntable according to  claim 2 , wherein an inner wall of the outer race ( 110 ) facing the center is provided with a first annular track ( 111 ), a radial depth of the first annular track ( 111 ) is equal to a radius of the ball ( 4 ), and a maximum axial opening size of the first annular track ( 111 ) is equal to a diameter of the ball ( 4 ). 
     
     
         4 . The jigsaw puzzle board turntable according to  claim 2 , wherein an outer wall of the inner race ( 200 ) facing away from the center is provided with a second annular track ( 201 ), a radial depth of the second annular track ( 201 ) is equal to a radius of the ball ( 4 ), and a maximum axial opening size of the second annular track ( 201 ) is equal to a diameter of the ball ( 4 ). 
     
     
         5 . The jigsaw puzzle board turntable according to  claim 1 , wherein the annular track is formed by a first annular track ( 111 ) and a second annular track ( 201 ), and the balls ( 4 ) are snap-fitted in a space between the first annular track ( 111 ) and the second annular track ( 201 ). 
     
     
         6 . The jigsaw puzzle board turntable according to  claim 5 , wherein a threaded hole ( 113 ) is provided in a radial direction of the outer race ( 110 ), and the threaded hole ( 113 ) extends from a side wall of the outer race ( 110 ) facing away from the center to the first annular track ( 111 ). 
     
     
         7 . The jigsaw puzzle board turntable according to  claim 6 , wherein a diameter of the threaded hole ( 113 ) is not less than a diameter of the ball ( 4 ), and the threaded hole ( 113 ) is sealed with a bolt ( 50 ). 
     
     
         8 . The jigsaw puzzle board turntable according to  claim 1 , wherein a plurality of first through holes ( 112 ) are evenly arranged in an axial direction of the outer race ( 110 ), a plurality of second through holes ( 202 ) are evenly arranged in an axial direction of the inner race ( 200 ), and the plurality of first through holes ( 112 ) and the plurality of second through holes ( 202 ) are correspondingly used for mounting support components ( 30 ). 
     
     
         9 . The jigsaw puzzle board turntable according to  claim 8 , wherein the outer race ( 110 ) and the inner race ( 200 ) are correspondingly disposed in the circular recess ( 70 ) at the bottom of the board body ( 2 ), and the support components ( 30 ) on the inner race ( 200 ) are magnetically attracted to magnetic components within the circular recess ( 70 ). 
     
     
         10 . The jigsaw puzzle board turntable according to  claim 9 , wherein an upper surface of the inner race ( 200 ) is directly magnetically attracted to the magnetic components within the circular recess ( 70 ) through the magnetic components. 
     
     
         11 . The jigsaw puzzle board turntable according to  claim 5 , wherein each of a radial cross-section of the first annular track ( 111 ) and a radial cross-section of the second annular track ( 201 ) is semicircular. 
     
     
         12 . The jigsaw puzzle board turntable according to  claim 5 , wherein each of a radial cross-section of the first annular track ( 111 ) and a radial cross-section of the second annular track ( 201 ) is rectangular. 
     
     
         13 . The jigsaw puzzle board turntable according to  claim 8 , wherein a support surface area of the support components ( 30 ) is greater than an installation surface area. 
     
     
         14 . The jigsaw puzzle board turntable according to  claim 9 , wherein an outer diameter of the outer race ( 110 ) is less than a diameter of the circular recess ( 70 ). 
     
     
         15 . The jigsaw puzzle board turntable according to  claim 9 , wherein each of a thickness of the outer race ( 110 ) and a thickness of the inner race ( 200 ) is greater than a depth of the circular recess ( 70 ).