| 摘要 |
A percussive tool includes a tool member and a member imparting strikes to the former. The tool member is located in a tool casing which is movable relative to a housing. A spring is located between the tool casing and the housing so as to substantially prevent transmission of impacts from the former to the latter. The tool housing is provide with a recess at a trailing end thereof into which a leading end of the imparting member can be received whereby the imparting member does not make contact with the tool casing. The axial length of the recess is such that when the tool casing is urged rearwardly to its initial position, a wall surrounding the recess surrounds the leading end of the imparting member.
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