Drum type washing machine

Abstract

Disclosed is a drum type washing machine, which effectively attenuates a vibration transferred to a tub. The present invention includes a cabinet forming an exterior, a tub in the cabinet to hold water, a drum in the tub to hold a detergent and the water, a rotational shaft penetrating into the tub to be coupled with a rear side of the drum, a motor transferring a driving force to the rotational shaft, and a damper provided between the tub and the cabinet to attenuate vertical, horizontal, and front-to-rear vibrations transferred to the tub by a rotation of the drum.

What is claimed is:  
     
         1 . A drum type washing machine comprising: 
 a cabinet forming an exterior;    a tub in the cabinet to hold water;    a drum in the tub to hold a detergent and the water;    a rotational shaft penetrating into the tub to be coupled with a rear side of the drum;    a motor transferring a driving force to the rotational shaft; and    a damper provided between the tub and the cabinet to attenuate vertical, horizontal, and front-to-rear vibrations transferred to the tub by a rotation of the drum.    
     
     
         2 . The drum type washing machine as claimed in  claim 1 , wherein the damper comprises a cylinder and a piston inserted in the cylinder to reciprocate.  
     
     
         3 . The drum type washing machine as claimed in  claim 2 , wherein a cylinder holder is provided at one end of the cylinder to be coupled with the tub and a piston holder is provided at one end of the piston to be coupled with the cabinet.  
     
     
         4 . The drum type washing machine as claimed in  claim 3 , wherein the cylinder and piston holders are hinge-coupled with fixing ends provided at the tub and cabinet, respectively.  
     
     
         5 . The drum type washing machine as claimed in  claim 1 , the damper comprising: 
 first and second dampers provided at left and right sides under a bottom of the tub to attenuate the vertical and horizontal vibrations; and    a third damper provided in rear of the tub to attenuate the front-to-rear vibration.    
     
     
         6 . The drum type washing machine as claimed in  claim 5 , wherein each of the first to third dampers comprises a cylinder and a piston inserted in the cylinder to reciprocate.  
     
     
         7 . The drum type washing machine as claimed in  claim 6 , wherein a cylinder holder is provided at one end of the cylinder to be coupled with the tub and a piston holder is provided at one end of the piston to be coupled with the cabinet.  
     
     
         8 . The drum type washing machine as claimed in  claim 7 , wherein the cylinder and piston holders are hinge-coupled with fixing ends provided at the tub and cabinet, respectively.  
     
     
         9 . A damper of a drum type washing machine, comprising: 
 first and second dampers provided at left and right sides under a bottom of the tub to attenuate the vertical and horizontal vibrations; and    a third damper provided in rear of the tub to attenuate the front-to-rear vibration.    
     
     
         10 . The damper as claimed in  claim 9 , wherein each of the first to third dampers comprises a cylinder and a piston inserted in the cylinder to reciprocate.  
     
     
         11 . The damper as claimed in  claim 10 , wherein a cylinder holder is provided at one end of the cylinder to be coupled with the tub and a piston holder is provided at one end of the piston to be coupled with the cabinet.  
     
     
         12 . The damper as claimed in  claim 11 , wherein the cylinder and piston holders are hinge-coupled with fixing ends provided at the tub and cabinet, respectively.