Abstract: The present invention discloses a fast-locking anti-loosening locking device, comprising a body, a pull rod threads, a cap nut, a pressing block and an eccentric handle, wherein the pull rod penetrates through the pressing block and the body; the pressing block is connected onto the pull rod in a sliding manner; the inner end of the pull rod is articulated with the inner end of the eccentric handle, and the outer end of the pull rod penetrates through the body to be in screw-thread fit with the cap nut; a mounting hole is formed in the eccentric handle, and is internally provided with a wrench and a spring. The fast-locking anti-loosening locking device has the advantage that even through in the case of firearm firing, the device can still maintain a locked state instead of loosening, thereby ensuring the reliability and practicality of the mechanism.

Abstract: The present invention discloses a fast-locking anti-loosening locking device, comprising a body, a pull rod with threads, a pressing block and an eccentric handle, wherein the pressing block is disposed on one side of the body, the pull rod respectively penetrates through the pressing blocking and the body, and one end of the pull rod is movably connected to the eccentric handle and the other end of the pull rod penetrates through the body to thread-fit a cap nut; and a spacing between the pressing block and the body is adjusted by rotating the cap nut to adapt to guide rails of different sizes. The present application has the following advantages: even through in the case of firearm firing, the fast-locking anti-loosening locking device can still maintain a locked state instead of loosening, thereby ensuring the reliability and practicality of the mechanism.