Powder-actuated fastener-driving device having sound-absorbing function

摘要

A powder-actuated fastener-driving device includes a hollow body including a tubular portion and a handle, and an inner tube movable forwardly and rearwardly within the tubular portion and having a front end disposed outwardly of the tubular portion, and a slot. The front end of the inner tube has an outer surface formed with a position-limiting groove. A stop member is disposed within the tubular portion, and extends into the slot. A sound-absorbing sleeve is sleeved movably on a portion of the tubular portion disposed outwardly of the handle, and has an inner surface formed with a position-limiting block, which is movable forwardly and rearwardly within the position-limiting groove. When the front end of the inner tube is pressed forwardly against an object, the sound-absorbing sleeve comes into contact with the handle.

主权项

1. A powder-actuated fastener-driving device comprising:
a hollow body including a tubular portion having a rear end, and a handle including a handle body sleeved on said rear end of said tubular portion; an inner tube movable forwardly and rearwardly within said tubular portion of said body and having a front end disposed outwardly of said tubular portion, and a slot formed through a wall of said inner tube and extending along a front-to-rear direction, said front end of said inner tube having an outer surface formed with a position-limiting groove; a firing device disposed within said handle body of said body and adapted for igniting a powder cartridge; a piston movable forwardly and rearwardly within said inner tube and adapted to be driven by the powder cartridge when said powder cartridge is ignited; a stop member disposed on said tubular portion of said body and extending into said slot in said inner tube; and a sound-absorbing sleeve that is sleeved on a portion of said tubular portion disposed outwardly of said handle and that has an inner surface formed with a position-limiting block, said position-limiting block being movable forwardly and rearwardly within said position-limiting groove to allow for forward and rearward movement of said inner tube and said sound-absorbing block relative to each other such that, when said front end of said inner tube is pressed forwardly against an object, a rear end of said sound-absorbing sleeve comes into contact with a front end of said handle, synchronous forward movement of said inner tube and said sound-absorbing sleeve being allowed when said position-limiting block is disposed at a front end of said position-limiting groove and when said inner tube is movable forwardly relative to said hollow body, synchronous rearward movement of said inner tube and said sound-absorbing sleeve being allowed when said position-limiting block is disposed at a rear end of said position-limiting groove and when said inner tube is movable rearwardly relative to said hollow body; wherein said tubular portion of said body is formed with a gas-guiding hole formed in a rear end portion thereof and aligned with said slot in said inner tube to allow gas produced within said inner tube during explosion of powder in the powder cartridge to be discharged from said powder-actuated fastener-driving device through said slot and said gas-guiding hole.