| 摘要 |
PROBLEM TO BE SOLVED: To provide a disposable-type medical knife which enables a blade body to be exposed and stored by a single-handed easy operation in use.SOLUTION: A medical knife includes a spring member 6 which is engaged between a knife part 2 and a cover 3 and which urges the knife part 2 in a storage position direction from an exposure position. When the knife part 2 is set in the exposure position from a storage position, an operation for pushing the knife part 2 into the cover 3 against elasticity of the spring member 6 is performed to disengage a lock pawl 26 from a first through-hole 44B and lock it to a second through-hole 44C. When the knife part 2 is returned to the storage position from the exposure position, the lock pawl 26 engaged to the second through-hole 44C is disengaged by an unlocking part 41; the knife part 2 is returned to the storage position by being urged by the spring member 6; and the lock pawl 26 is engaged to the first through-hole 44B. A leading end, on the side of exposure of a blade body 23, of the cover 3 is provided with a hold part 47 which stabilizes the blade body by sandwiching the knife part 2. |
