Image forming apparatus

Abstract

An image forming apparatus has an actuation portion emitting an actuation sound and an internal part provided away from and opposed to the actuation portion. Further the image forming apparatus has a sound absorbing member formed of a foam metal, and provided away from the internal part between the actuation portion and the internal part.

1 . An image forming apparatus comprising: 
 an internal part away from a wall of a housing inward of the apparatus;    an actuation portion emitting an actuation sound and provided outside said housing; and    a sound absorbing member formed of a foam metal and provided in an opening portion, which is provided in said wall between said internal part and said actuation portion.    
   
   
       2 . An image forming apparatus according to  claim 1 , wherein a porosity of said foam metal is 50% or more.  
   
   
       3 . An image forming apparatus according to  claim 1 , wherein a space between said internal part and said sound absorbing member is set to substantially one fourth of a wavelength of the actuation sound.  
   
   
       4 . An image forming apparatus according to  claim 1 , wherein said sound absorbing member is formed of aluminum.  
   
   
       5 . An image forming apparatus according to  claim 1 , wherein a space between said internal part and said sound absorbing member is set to 20 mm.  
   
   
       6 . An image forming apparatus according to  claim 1 , wherein said actuation portion comprises a pickup roller lifting and lowering to feed a sheet supported on a tray and said internal part is a component constituting the image forming apparatus for forming an image on a sheet.  
   
   
       7 . An image forming apparatus comprising: 
 an actuation portion emitting an actuation sound, provided inside a housing and opposed to an opening portion formed in a wall of said housing;    an internal part provided in an inner part of said housing, opposed to and away from said actuation portion; and    a sound absorbing member formed of a foam metal, provided between said actuation portion and said internal part, and away from said internal part.    
   
   
       8 . An image forming apparatus according to  claim 7 , wherein a porosity of said foam metal is 50% or more.  
   
   
       9 . An image forming apparatus according to  claim 7 , wherein a space between said internal part and said sound absorbing member is set to substantially one fourth of a wavelength of the actuation sound.  
   
   
       10 . An image forming apparatus according to  claim 7 , wherein said sound absorbing member is formed of aluminum.  
   
   
       11 . An image forming apparatus according to  claim 7 , wherein a space between said internal part and said sound absorbing member is set to 20 mm.  
   
   
       12 . An image forming apparatus comprising: 
 an actuation portion emitting an actuation sound;    an internal part provided away from and opposed to said actuation portion, wherein said internal part is a component constituting an image forming portion for forming an image on a sheet; and    a sound absorbing member formed of a foam metal, provided between said actuation portion and said internal part, and away from said internal part.