Exhaust system of electric vacuum cleaner

Abstract

An exhaust system includes a pipe tube for discharging an exhaust air ejected from an exhaust port of an electric vacuum cleaner to a predetermined exterior location, the pipe tube including a tube main body made of a pliable and less-stretchable material, and a cord inserted into the tube main body, the cord being made of a pliable and highly-stretchable material. The cord, when not stretched, has a length close to an actual extension length which permits connection between the exhaust port of the indoor electric vacuum cleaner and the predetermined exterior location. The tube main body is equal in length to the cord when being stretched. In this state, the ventilation function of the tube main body has a maximum value.

I claim: 
     
         1 . An exhaust system of an electric vacuum cleaner, comprising:
 a pipe tube for discharging an exhaust air ejected from an exhaust port of the electric vacuum cleaner to a predetermined exterior location, the pipe tube having one end connected to the exhaust port of the electric vacuum cleaner, and the other end fixed at the predetermined exterior location, the pipe tube comprising
 a tube main body made of a pliable and less-stretchable material, and 
 a cord inserted into the tube main body, the cord being made of a pliable and highly-stretchable material, 
   the cord, when not stretched, having a length close to an actual extension length which permits connection between the exhaust port of the electric vacuum cleaner for indoor use and the predetermined exterior location, and   the tube main body being equal in length to the cord when being stretched.