Washing machine

Abstract

In a washing machine, vibration of a cabinet vibrated by a tub is offset by a dynamic vibration absorber. Therefore, vibration of the cabinet is reduced and thus noise of the washing machine is reduced.

1 . A washing machine comprising:
 a cabinet;   a tub provided within the cabinet and for storing washing water; and   a dynamic vibration absorber whose one end is fixed to the cabinet and whose the other end forms a free end and for offsetting a vibration of the cabinet vibrated by a vibration of the tub.   
   
   
       2 . The washing machine of  claim 1 , wherein the dynamic vibration absorber comprises a vibration member whose one end is fixed to the inside of the cabinet and whose the other end is extended to the inside of the cabinet. 
   
   
       3 . The washing machine of  claim 2 , wherein the other end of the vibration member is extended to the downside of the inside of the cabinet. 
   
   
       4 . The washing machine of  claim 2 , wherein the dynamic vibration absorber further comprises a mass member having a predetermined mass and coupled to the vibration member. 
   
   
       5 . The washing machine of  claim 1 , wherein the cabinet comprises a side cabinet for defining the side of space in which the tub is disposed. 
   
   
       6 . The washing machine of  claim 5 , wherein the dynamic vibration absorber has a natural frequency substantially identical to a natural frequency of the side cabinet. 
   
   
       7 . The washing machine of  claim 1 , wherein the other end of the dynamic vibration absorber is separated from the cabinet so that the dynamic vibration absorber does not contact with the cabinet, when the dynamic vibration absorber vibrates. 
   
   
       8 . The washing machine of  claim 5 , wherein when the side cabinet has a plurality of natural vibration modes, a plurality of dynamic vibration absorbers is disposed. 
   
   
       9 . The washing machine of  claim 8 , wherein the plurality of dynamic vibration absorbers has natural frequencies corresponding to a plurality of natural vibration modes of the side cabinet. 
   
   
       10 . The washing machine of  claim 5 , further comprising a reinforcement member disposed at the inside of the side cabinet and for reinforcing rigidity of the side cabinet. 
   
   
       11 . The washing machine of  claim 10 , wherein the dynamic vibration absorber comprises:
 a vibration member whose one end is coupled to the reinforcement member and whose the other end forms a free end extended to the downside of the inside of the cabinet; and   a mass member having a predetermined mass and coupled to the vibration member,   wherein the dynamic vibration absorber damps a vibration of the side cabinet by vibrating in a phase opposite to a vibration phase of the side cabinet.   
   
   
       12 . The washing machine of  claim 1 , wherein the dynamic vibration absorber damps a vibration of the cabinet by vibrating in a phase opposite to a vibration phase of the cabinet.