Patent ID: 8079355
Filing Date: 2011-12-20
Classification: F41B

Abstract:
1. A firing device of a side-handle baton, comprising: a first shaft portion having a front section penetrated longitudinally by a bore and a rear section penetrated longitudinally by a receiving hole, wherein the receiving hole is connected with the bore, has a slightly larger diameter than the bore, thus forming a shoulder where the bore and the receiving hole are connected, and has a rear end wall provided with an internal thread, the first shaft portion being penetrated vertically by a through hole near the rear section, the first shaft portion further having a bottom side provided with a slot behind the through hole; a second shaft portion comprising a shaft and a shaft cap, the shaft having a same outer diameter as the first shaft portion and being penetrated longitudinally by a passage, the passage having a front end wall and a rear end wall, wherein the front end wall is provided with an internal thread having same specifications as the internal thread of the first shaft portion, and the rear end wall is also provided with an internal thread, the shaft having a rear end surface formed with a plurality of angularly spaced engaging grooves; the shaft cap having an integrally formed front extension defined as a front rod for being inserted in the passage of the shaft, the front rod being provided with an external thread which is adjacent to the shaft cap and has same specifications as the internal thread at the rear end wall of the passage, the shaft cap having an upper side formed with a slot in which a fastening lever is pivotally provided, the fastening lever having a front end pushed by a spring so as to be constantly level with a slot surface of the slot of the shaft cap; a magazine portion comprising: a magazine seat, a top cover, a magazine body, and a pushbutton; the magazine seat having a bottom portion formed as a C-shaped base, the magazine seat being penetrated longitudinally by a through hole and having an upper end which is provided with an external thread and is laterally provided with a slot at an appropriate position; the top cover being penetrated by a hollow portion and having a lower end provided with an internal thread having same specifications as the external thread at the upper end of the magazine seat, the top cover further having a through hole formed above and having a smaller diameter than the internal thread of the top cover; the magazine body being a cylindrical element penetrated longitudinally by a receiving hole, wherein the magazine body has: a lower end penetrated transversely by a transverse through hole, a bottom portion protrudingly provided with a pushing block, and an upper end which is laterally screwed with a stop screw and provided with an internal thread; the pushbutton having a button body whose outer diameter is slightly smaller than a diameter of the through hole of the top cover, the button body having a lower extension provided with an external thread having same specifications as the internal thread at the upper end of the magazine body; the magazine portion being assembled by: inserting the magazine body into the through hole of the magazine seat in such a way that the stop screw of the magazine body is aligned with the slot of the magazine seat, engaging the internal thread of the top cover with the external thread at the upper end of the magazine seat such that the top cover is connected to and covers the upper end of the magazine seat, and engaging the external thread of the pushbutton with the internal thread of the magazine body such that the pushbutton passes through the through hole of the top cover and is mounted on the upper end of the magazine body while the button body of the pushbutton is exposed outside the top cover; a trigger housing internally formed with a recess, there being a trigger pivotally provided in a front portion of the recess via a pivot received in a slide groove passing through the trigger, wherein a pushing spring is fixedly provided below a front end of the trigger such that the front end of the trigger constantly rests on the pushing spring, there also being a sear pivotally provided in a rear portion of the recess via a pivot received in a slide groove passing through the sear, wherein an extension spring has an end connected to a bottom of a front end of the sear and an opposite end connected to a supporting rod in the recess, the sear having a rear upper end pivotally connected with a roller which, due to contraction of the extension spring, constantly juts out of the recess; a gas chamber portion comprising: a gas chamber body, a plurality of gaskets, a gasket fixing member, a gas chamber end cap, and a puncturer; the gas chamber body being penetrated longitudinally by a hollow portion, wherein the hollow portion has: a front section provided with an internal thread, a gasket cavity adjacent to the internal thread of the front section, a through hole following the gasket cavity, and a rear end provided with an internal thread; the gaskets being annular washers received in the gasket cavity of the gas chamber body; the gasket fixing member being penetrated centrally and longitudinally by a hollow portion and having a front section provided with an external thread having same specifications as the internal thread on the front section of the hollow portion of the gas chamber body so as for the gasket fixing member to be screwed into the internally threaded front section of the hollow portion of the gas chamber body and thereby press tightly against and fix the gaskets in position; the gas chamber end cap being provided therein with a cavity, a puncturer hole, an internally threaded hole, and a front hole which are arranged in a rear-to-front direction and sequentially connected, wherein the front hole has a wall penetrated by a through hole for communication between an inside and an outside of the front hole, the gas chamber end cap having a front section provided with a first external thread having same specifications as the internal thread at the rear end of the hollow portion of the gas chamber body, there being a first O-ring mounted behind and adjacent to the first external thread on the front section of the gas chamber end cap, the gas chamber end cap being provided with a second external thread which is located immediately behind the first O-ring and has same specifications as the internal thread on the rear end wall of the receiving hole of the first shaft portion and the internal thread on the front end wall of the passage of the shaft, the gas chamber end cap being connected to a rear end of the gas chamber body by engagement between the first external thread on the front section of the gas chamber end cap and the internal thread at the rear end of the hollow portion of the gas chamber body; the puncturer being penetrated centrally by a hollow portion and having a front end provided with an external thread having same specifications as the internally threaded hole of the gas chamber end cap, there being a second O-ring mounted behind the external thread of the puncturer, the puncturer having a rear end surface provided with a conical piercing element, the puncturer being hermetically installed in the puncturer hole of the gas chamber end cap by engagement between the external thread of the puncturer and the internally threaded hole of the gas chamber end cap; and a nozzle portion comprising: a nozzle, a nozzle piston rod, and a nozzle recoil spring; the nozzle being penetrated longitudinally by a hollow portion and having: a front section provided with an internal thread, a rear section formed as a through hole extending to a rear end opening of the nozzle, and a rear end externally and circumferentially provided with an engaging groove; the nozzle piston rod having a front end, wherein the front end is provided with an external thread having same specifications as the internal thread on the front section of the nozzle and is peripherally formed with a plurality of channels, the nozzle piston rod further having a rod portion formed with a rounded rear end, the nozzle piston rod being installed in the nozzle by engagement between the external thread of the nozzle piston rod and the internal thread of the nozzle; the nozzle recoil spring having an inner diameter greater than an outer diameter of the front section of the nozzle so as to be mounted around the front section of the nozzle; wherein the firing device is assembled by: installing the C-shaped base of the magazine portion above the through hole of the first shaft portion; connecting the trigger housing to the bottom side of the first shaft portion at a position corresponding to the through hole and the slot of the first shaft portion; inserting a front section of the gas chamber body of the gas chamber portion into the through hole of the nozzle of the nozzle portion such that the nozzle portion and the gas chamber portion are connected as a single-unit assembly; inserting the single-unit assembly into the receiving hole at the rear section of the first shaft portion by engagement between the second external thread of the gas chamber end cap and the internal thread on the rear end wall of the receiving hole of the first shaft portion until the nozzle recoil spring in the single-unit assembly is pressed against the shoulder in the first shaft portion, in which state the roller of the sear is engaged in the engaging groove of the nozzle while the second external thread of the gas chamber end cap is half engaged with the internal thread on the rear end wall of the receiving hole of the first shaft portion and half exposed at a rear end of the first shaft portion; connecting the shaft of the second shaft portion to the rear end of the first shaft portion by engagement between the internal thread on the front end wall of the passage of the shaft and the exposed portion of the second external thread of the gas chamber end cap; placing a CO