| 摘要 |
PROBLEM TO BE SOLVED: To provide a spare blade cartridge positioning mechanism for preventing mistaking a mounting direction when mounting a spare blade cartridge on a head part of a holder and to simplify the positioning mechanism by effectively sharing an existing structure. SOLUTION: By inserting both movable supporting point parts 5 between both fixed supporting point parts 13 to insert guide projection strips 22 of both movable supporting arm parts 20 into guide grooves of both fixed supporting arm parts 15, in whose supporting state a pusher 6 is press-welded to a press- contacting part 14, a spare blade cartridge 2 is attached to the head part 4 of a holder 1 so as to freely oscillate. An allowable groove is formed in the guide groove of each fixed supporting arm part 15, a regulating projection 23 is formed in the guide projection strip 22 of each movable supporting arm part 20, and a regulating projection 23 is set so as to be inserted in the allowable groove only when the spare blade cartridge 2 is attached to the head part 4 in the righit direction P. As a result, the spare blade cartridge 2 can be readily attached to the head part 4 of the holder 1 without failing the attaching direction.
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