| 摘要 |
The trocar is provided with a leaf spring (25) in the housing (13) whch abuts a collar (17) on a protective tube (16) which surrounds the sharp tip (15) of the stylet (14). A spring finger (26) extending from the leaf spring is actuated by a slider (28) when the two housings (13, 37) of the trocar components are squeezed together. The spring finger initially lifts the leaf spring from the collar to release the protective tube for sliding proximally while the collar subsequently lifts the spring finger from the shoulder of the slider to prevent a re-release of the leaf spring when the protective tube (16) is moved back into the extended position. |
