Symbol display device for game machine

Abstract

A symbol display device includes a stepping motor, a drive gear attached to a drive shaft of the stepping motor, a reduction gear meshing with the drive gear, and a reel fixed to the reduction gear. The stepping motor, the drive gear and the reduction gear are contained in the housing disposed in the reel. As a pitch radius of the reduction gear is set so as to be larger than that of the drive gear, a velocity of rotation of the reduction gear is lower than that of the drive gear. The stepping motor causes to rotate the reel with reduction of the rotational velocity.

What is claimed is:  
     
         1 . An symbol display device having a reel on whose periphery plural symbols are arranged, a stepping motor for rotating a reel, a rotation transmitting mechanism for transmitting a rotation of said stepping motor to said reel, said rotation transmitting mechanism comprising: 
 a first rotational member attached to said stepping motor;    a second rotational member for rotating said reel, a diameter of said second rotational member being larger than that of said first rotating member such that a rotational velocity may be reduced; and    a housing containing said stepping motor, said first rotating member and said second rotating member and rotatably holding said second rotational member, said housing being disposed in said reel.    
     
     
         2 . An symbol display device as claimed in  claim 1 , wherein said first rotational member is a drive gear, and said second rotational member is a reduction gear.  
     
     
         3 . An symbol display device as claimed in  claim 2 , further comprising: 
 a partition plate for separating an inside of said housing,    wherein said reduction gear is rotatably attached to said partition plate, a part of said reduction gear protrudes from an opening of said housing, and said reel is attached to said part.    
     
     
         4 . An symbol display device as claimed in  claim 3 , wherein said reduction gear has an inner gear portion meshed with said drive gear.  
     
     
         5 . A symbol display device as claimed in  claim 2 , further comprising: 
 a rotational shaft, rotatably attached to said housing, for holding said reduction gear; and    a connect member for holding said reel, said connect member being formed with said reduction gear.    
     
     
         6 . A symbol display device as claimed in  claim 5 , further comprising: 
 a bearing for rotatably supporting said rotational shaft, an first end of said bearing being fixed to said housing; and    a bearing holder plate having an opening that is fixed to said stepping motor, said opening being rigidly fitted to an second end of said bearing.    
     
     
         7 . A symbol display device as claimed in  claim 2 , wherein said first rotational member is a small pulley, said second rotational member is a large pulley, and said large pulley is connected through a belt with said small pulley.  
     
     
         8 . A symbol display device as claimed in  claim 7 , further comprising: 
 a rotational shaft for holding said large pulley, said rotational shaft being rotatably attached to said housing; and    a connect member for holding said reel, said connect member being fixed to said rotational shaft.    
     
     
         9 . A symbol display device as claimed in  claim 1 , further comprising: 
 a light-shielding fragment attached to said second rotational member;    a photo sensor fixed in said housing, said photo sensor detecting a passing of said light-shielding member in order to detect a home position of said reel.