Joint structure of toy

Abstract

Disclosed is a joint structure of a toy including: a first block and a second block to structure the toy; a ball joint including: a ball portion provided on the first block to be able to take a predetermined position close to the first block and a separated position separated from the first block; and a ball shaped bearing provided on the second block to engage to the ball portion; and an engaging section structured to be able to engage and release the first block and the ball joint by hand to hold the ball portion at the predetermined position when in an engaged state and to allow the ball portion to move to the separated position when in a released state.

1 . A joint structure of a toy comprising:
 a first block and a second block to structure the toy;   a ball joint including:
 a ball portion provided on the first block to be able to take a predetermined position close to the first block and a separated position separated from the first block; and 
 a ball shaped bearing provided on the second block to engage to the ball portion; and 
   an engaging section structured to be able to engage and release the first block and the ball joint by hand to hold the ball portion at the predetermined position when in an engaged state and to allow the ball portion to move to the separated position when in a released state.   
   
   
       2 . The joint structure of the toy according to  claim 1 , wherein:
 the ball portion is structured as a head of an eccentric pin projected at an eccentric position of a rotating body provided on the first block; and   the engaging section includes:
 a positioning section to position the ball portion at the predetermined position; 
 a guide pin provided at a position separated from the rotating body of the first block; and 
 a guide piece provided on the second block to engage to the guide pin to control swinging of the second block with respect to the first block. 
   
   
   
       3 . The joint structure of the toy according to  claim 1 , further comprising:
 a third block provided on a side of the first block opposite of a side where the second block is provided;   a first shaft and a bearing to connect the first block and the third block to enable a rotation of the first block with respect to the third block; and   a second shaft provided to the ball portion to engage to the third block to lock the rotation when the ball portion is at the predetermined position and to release an engagement of the second shaft to the third block to allow the rotation when the ball portion is at the separated position.   
   
   
       4 . The joint structure of the toy according to  claim 1 , wherein:
 the engaging section includes:
 a cylindrical body provided on the first block; and 
 a fitting section provided on the second block to fit to an outer side of the cylindrical body, and 
   the ball portion is provided to project from a tip of the cylindrical body.