| 摘要 |
PROBLEM TO BE SOLVED: To provide a sleeve shape device for keeping the block position of a safety sleeve regardless of an outer force added to the safety sleeve and holding screws when the screws are driven onto an object by a screwdriver. SOLUTION: The device comprises a first spring (64) which is arranged between an inner shoulder part (62) disposed at an end part facing the extendable part (14) of a second handle part (44) and the radius direction shoulder part of the safety sleeve (28) and comprises at least one mutual lock mechanism which fixes the safety sleeve (28) to a catch sleeve (12) at a block position in an axial line direction, which is operated by the handle part (44) when being moved by prescribed distance concerning the sleeves (12 and 28) and which is operated between the safety sleeve (28) and the catch sleeve (12).
|
