Patent ID: 7219386

Claim:
A holding device for a cleaning wiper comprising: a telescopic handle having axially opposed front and rear ends; and a support member provided at the front end of the telescopic handle for attachment of a cleaning wiper, the telescopic handle being constructed of a first separate shaft, a second separate shaft and a third separate shaft in front-to-rear order when the telescopic handle is fully extended, the individual separate shafts being a hollow cylinder, the first separate shaft being adapted to axially fit within the second separate shaft, the second shaft being adapted to axially fit within the third separate shaft, the first and second separate shafts having axially extending elastic arms and engaging projections at leading ends of the elastic arms, the engaging projection of the first separate shaft having a slope whose projecting dimension gradually decreases toward the rear end of the telescopic handle, the second and third separate shafts having through-holes which pass through a cylinder wall thereof and in which the engaging projections of the first and second separate shafts engage, respectively, when the telescopic handle is fully extended, wherein pressing the engaging projection of the second separate shaft, which engages in the through-hole of the third separate shaft, from outside the third separate shaft permits release of the engaging projection of the second separate shaft from the through-hole of the third separate shaft for retraction of the second separate shaft into the third separate shaft, and wherein the projecting dimension of the slope of the engaging projection of the first separate shaft which engages the through-hole of the second separate shaft gradually decreases toward at an edge of the engaging projection of the first separate shaft that is located against an engaging edge of the through-hole of the second separate shaft, such that the projecting dimension at the edge of the engaging projection of the first separate shaft lies along the engaging edge and within the through hole of the second separate shaft when the engaging projection of the first separate shaft engages the through hole of the second separate shaft, and as the second separate shaft is retracted into the third separate shaft, the engaging projection of the first separate shaft is displaced radially inwardly by contact of the slope with a front end of the third separate shaft, causing the edge of the engaging projection of the first separate shaft to fall below the engaging edge in the through-hole of the second separate shaft, and allowing the engaging projection of the first separate shaft to be further radially inwardly displaced by contact of the slope with the engaging edge of the through hole of the second separate shaft to come out of the through-hole of the second separate shaft without the need of pressing the engaging projection of the first separate shaft with a finger.