Drum washing machine

Abstract

Disclosed herein is a drum washing machine including: a cabinet; a tub fillable with wash water; a drum receiving laundry therein; a motor at the rear of a lower portion of the tub; a balancer coupled to a front surface of the tub; a plurality of springs having one end coupled to the cabinet and another end coupled to an upper surface of the tub to support the tub; and a plurality of dampers having one end coupled to the cabinet and another end coupled to a lower surface of the tub, wherein the springs include one spring coupled to one side of the cabinet and another spring coupled to an opposite side of the cabinet, the one spring having a spring constant different from that of the other spring.

1 . A drum washing machine comprising:
 a cabinet;   a tub in the cabinet and fillable with wash water;   a rotatable drum in the tub and receiving laundry therein;   a motor at a rear of a lower portion of the tub and generating power;   a motor pulley connected to the motor;   a drum pulley connected to the drum;   a belt having one side wound around the motor pulley and the other side wound around the drum pulley so that the motor rotates the drum;   a balancer coupled to a front surface of the tub;   a plurality of springs having one end coupled to the cabinet and another end coupled to an upper surface of the tub to support the tub; and   a plurality of dampers having one end coupled to the cabinet and another end coupled to a lower surface of the tub,   wherein the springs include one spring coupled to one side of the cabinet and another spring coupled to an opposite side of the cabinet, the one spring having a spring constant different from that of the other spring.   
     
     
         2 . The drum washing machine according to  claim 1 , wherein the spring constant of the one spring is larger than that of the other spring. 
     
     
         3 . The drum washing machine according to  claim 2 , wherein the one spring has a length greater than that of the other spring. 
     
     
         4 . The drum washing machine according to  claim 3 , wherein when the drum is not rotated, the one spring and the other spring have a same length. 
     
     
         5 . The drum washing machine according to  claim 2 , wherein the dampers include one damper coupled to one side of the cabinet and another damper coupled to an opposite side of the cabinet, the one damper having a frictional force different from that of the other damper. 
     
     
         6 . The drum washing machine according to  claim 5 , wherein the frictional force of the one damper is larger than that of the other damper.