Washer and method of forming drum thereof

Abstract

A washer and method of forming a drum thereof are disclosed. The present invention includes a body, a tub provided within the body to accommodate water therein, a drum provided within the tub to have at least one lifter built in one body of the drum, and a motor for rotating the drum. Accordingly, the lift and drum are built in one body to perform a role of the lifter sufficiently and a volume of the drum can be maximized by maintaining an exterior size of the drum as it is.

1 . A washer comprising: 
 a body;    a tub provided within the body to accommodate water therein;    a drum provided within the tub to have at least one lifter built in one body of the drum; and    a motor for rotating the drum.    
     
     
         2 . The washer of  claim 1 , wherein the drum comprises a drum center configuring a circumference wall of the drum and wherein the at least one lifter is built in one body of the circumference wall by a drawing processing.  
     
     
         3 . The washer of  claim 2 , wherein the at least one lifter is configured to be spaced apart from each of both ends of the drum center.  
     
     
         4 . The washer of claims  1 , wherein the at least one lifter comprises at least four lifters.  
     
     
         5 . The washer of  claim 4 , wherein each of the at least four lifters is provided with an embossed part.  
     
     
         6 . The washer of  claim 5 , wherein each of the at least four lifters is provided with a multitude of perforated holes.  
     
     
         7 . The washer of  claim 6 , wherein the embossed part comprises a concave portion and a convex portion configured in a length direction of each of the at least four lifters.  
     
     
         8 . The washer of  claim 7 , wherein the multitude of the perforated holes are provided to the concave portion of the embossed part.  
     
     
         9 . The washer of  claim 8 , wherein each of the at least four lifters is configured to have at least one or more step differences.  
     
     
         10 . The washer of  claim 9 , wherein the at least one or more step differences are configured to gradually increase toward a rear side of the drum.  
     
     
         11 . A lifter built-in drum comprising: 
 a circumference wall; and    at least one lifter built in one body of the circumference wall by a drawing processing.    
     
     
         12 . A method of forming a drum, comprising the steps of: 
 providing a lifter to a drum center by a drawing processing;    seaming the drum center provided with the lifter into a cylindrical shape; and    assembling a drum front and a drum back to front and rear sides of the drum center by seaming, respectively.