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    • 10. 发明专利
    • PERCUSSION MECHANISM
    • JPH06159992A
    • 1994-06-07
    • JP35435392
    • 1992-11-28
    • JAPAN TECH RES & DEV INSTJAPAN STEEL WORKS LTD
    • TSUMURA HIDEICHIROYOSHIMATSU MORIYOSHI
    • F41A3/38F41A7/08F41A19/13F41A19/28
    • PURPOSE:To provide a mechanism wherein a bolt is composed so as to be simple and to be operable at high speed and a firing pin can also be advanced at high speed. CONSTITUTION:A bolt 4 has a firing pin 6 in a bolt body 5 for locking a barrel 2 at the front end side thereof, which pin can come in and out, and has a percussion lever 7 which is in contact with the rear end of the firing pin 6 and can be rocked forward. The firing pin 6 is advanced by the percussion lever 7 and ammunition W is percussed. In a chain-driving mechanism 9, an engaging catch 11 is pivotally joined to a pair of driving chain links 10 and a catch part 12 is provided so as to be vertically movable. The driving chain links 10 and the engaging catch 11 are guidably supported on a guide face 13, and the catch part 12 engages with the rear end of the bolt body 5 and advances the bolt body 5. First and second recessed parts 14, 15 are formed on the guide face 13, the catch part 12 is moved downward by the first recessed part 14 and the condition that the catch part 12 engages with the bolt body 5 is released. After that, the catch part 12 engages with the percussion lever 7 and rocks it forward. Furthermore, the catch part 12 is more moved downward by the second recessed part 15 and the condition that the catch part 12 engages with the percussion lever 7 is released.