| 摘要 |
PROBLEM TO BE SOLVED: To provide a safe cutter knife of which the cutter is automatically housed into a case after use. SOLUTION: Both flanks of a case 1 are provided with long holes 2. A movable pusher 3 is fitted into the long hole on one side and a movable stopper 5 attached with a knob 4 is fitted into the long hole on the opposite side. The cutter 6 is fixed to the pusher 3 and the inside of the case 1 is provided with a tension spring 7 of the cutter 6 detained to the rear end of the case 1 and part of the pusher 3. The pusher 3 and the cutter 6 are integral and are slid by bring guided with a cutter guide 8 disposed at the case 1.
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