| 摘要 |
A lock-type disposal safe scalpel comprising a blade ( 6 ), a handle ( 7 ) and a sheath ( 8 ). The sheath ( 8 ) is coupled to the handle ( 7 ) via a sliding mechanism and a positioning mechanism. The sheath ( 8 ) is provided with a button ( 1 ) and a locking block ( 2 ). A protective locking recess ( 3 ) and an operative locking recess ( 4 ) are provided on the front end of a sliding groove ( 5 ) of the handle ( 7 ) respectively. The button ( 1 ) is operated to press the locking block ( 2 ) so that the sheath ( 8 ) is slidably transferable between a position at the protective locking recess ( 3 ) and a position at the operative locking recess ( 4 ). A deadlock recess ( 12 ) is provided on the front end of protective locking recess ( 3 ) of the sliding groove ( 5 ), and the deadlock recess ( 12 ) is provided with a hindering mechanism so as to prevent the locking block ( 2 ) from disengaging, whereby the scalpel is brought into a deadlocked state. The sheath can be deadlocked to the handle when the sheath is operated to retreat back after use.
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