Extension tube for electric vacuum cleaner

Abstract

The purpose of the present invention is to provide an extension tube for electric vacuum cleaner, which has a reduced weight, is easier to grip, and is easier to operate. This extension tube for electric vacuum cleaner comprises a tube body and a conductive unit provided so as to pass through the interior of the tube body. The conductive unit has a conductive cable and a hollow plate which accommodates the conductive cable.

1 . An extension tube for an electric vacuum cleaner comprising: a tube body; and a conductive unit provided so as to pass through the tube body,
 wherein the conductive unit includes conductive cables and a hollow plate accommodating the conductive cables.   
     
     
         2 . The extension tube according to  claim 1 , wherein the hollow plate has a support plate and a cover plate, the support and cover plates covering the conductive cable so as to hold the conductive cable therebetween. 
     
     
         3 . The extension tube according to  claim 2 , wherein the conductive cable and the support plate are longer than the tube body, the conductive cable is longer than the support plate, and the support plate is longer than the cover plate. 
     
     
         4 . The extension tube according to  claim 2 , wherein the support plate includes a base part having a recessed cross-section and a pair of hook pieces provided along upper ends of both lateral surfaces of the base part. 
     
     
         5 . he extension tube according to  claim 4 ,
 wherein the support plate has, on the base part, a flat bottom part for receiving the cover plate, and   the cover plate has an outer face having an arc cross-section.   
     
     
         6 . The extension tube according to  claim 2 ,
 wherein the cover plate has a groove provided along a longitudinal direction in a widthwise central part for individually housing the conductive cables.   
     
     
         7 . The extension tube according to  claim 6 , wherein the cover plate has hemisphere ribs at both ends and an intermediate part of the groove, the hemisphere ribs holding the conductive cables housed in the groove to prevent displacement of the conductive cables.