| 摘要 |
<p>A trigger mechanism comprises a trigger 10 with a protuberance 14, shaped in the general form of a epicycloid, which engages recess 15, shaped in the general form of a hypocycloid, in a rocker 20. The trigger 10, when pulled, pivots about pin 11, thereby pivoting rocker 20 about pin 31 which allows a cut-out (34, fig 2) to engage with a sharp nosed portion 35 on the rocker 20. This ensures that there is no movement of the trigger 10 and lock pin 33 at the moment of firing. A sear spring 30 is retained in its upper position by sear spring 25 which is located in slide 27 the top of which is angled and engages tail 29 on the rocker 20. The mechanism, when applied to guns, allows the cartridges to be ejected without the risk of the gun being fired. It is possible to employ the mechanism in latching, locking, gearing or driving applications. <IMAGE></p> |
