| 摘要 |
An adjustable apparatus handle having a shaft, a grip sleeved onto the shaft, and a butt cap fixedly fastened to one end of the grip, wherein the shaft has a front part of polygonal cross section, a rear part of reduced diameter, and a piston endpiece at one end of the rear part remote from the front part; the grip has a front part fitting over the front part of the shaft, a rear part fitting over the rear part of the shaft and defining an air chamber between the piston endpiece of the shaft and the butt cap; the butt cap having an air hole disposed in communication between the air chamber and the atmosphere, and a control valve moved in the air hole between a first position where the air hole is closed and the air chamber is maintained in an air tight status to stop the shaft from an axial movement in the grip, and a second position where the air hole is opened and air is allowed to pass between the air chamber and the atmosphere, permitting the shaft to be moved axially in the grip.
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