Projectile launcher trigger
A trigger assembly for a projectile launcher with a hinged cuff that attaches to the launcher pole using a quick-release mechanism. A trigger mechanism has a elongated finger, one end of which is bent 90° to a stem that is pivotally mounted. One end of a release bar is pivotally mounted to the stem bend such that pulling the trigger pulls the release bar backwardly. A pivotally-mounted catch has an arm that forms a notch for the launcher pouch loop. The catch is held in the capture position by the release arm holding against a ledge on the catch. Pulling the trigger causes the release arm to release the catch. A pivotally-mounted safety latch has a finger with a notch that hooks onto a pin in the trigger to prevent pulling the trigger. A latch release lever enables the user to disengage the latch from the pin.
1. A trigger assembly for a projectile launcher comprising:
(a) a cylindrical hub having a central system axis, the hub comprised of a trigger half-cylinder with a hinge edge and a free edge and a pole half-cylinder with a hinge edge and a free edge, the trigger half-cylinder hinge edge and the pole half-cylinder hinge edge being attached by a hinge to pivot paraxially with the system axis;
(b) an attachment mechanism for securing the trigger half-cylinder free edge and the pole half-cylinder free edge together;
(c) a trigger mechanism mounted in a trigger housing on the trigger half-cylinder, the trigger housing having an outer surface, the trigger mechanism comprising:
(1) an elongated trigger having a first end and a second end, an approximately 90° bend to a stem at the first end, the stem having a pivot end opposite the bend, the pivot end being mounted in the trigger housing to pivot perpendicularly to the system axis, the second end extending back and outwardly from the trigger housing;
(2) a release bar with a trigger end and a catch end, the release bar mounted to reciprocate paraxially with the system axis in a channel in the trigger housing, the trigger end mounted to pivot perpendicularly to the system axis at the trigger bend;
(3) a spring mounted to bias the release bar forwardly; and
(4) a catch mounted in the trigger housing to pivot perpendicularly to the system axis and having an arm extending away from the pivot, the catch pivoting between a capture position wherein the arm extends outwardly and rearwardly and forming a notch with a hollow on the trigger housing outer surface, and a release position wherein the arm extends generally forwardly, the catch having a ledge such that, when in the capture position, the catch end of the release bar overhangs the ledge to prevent pivoting of the catch;
(d) whereby, when the trigger is pulled inwardly, the release bar is pulled rearwardly away from the catch ledge, permitting the catch to pivot forwardly.
2. The trigger assembly of claim 1 further comprising a latch mechanism comprising:
(a) a latch mounted in the trigger housing outside of the trigger to pivot perpendicularly to the system axis, the latch having a hook finger with a forward facing hook notch with an inside wall and latch release lever extending outwardly and rearwardly;
(b) a latch pin extending transversely through a slot in the trigger rearwardly of the stem bend; and
(c) a spring biasing the latch in a latched position where the latch pin is in the hook notch, preventing the trigger from being pulled inwardly;
(d) whereby, when the latch release lever is pushed outwardly to an unlatched position, the latch pin is not in the hook notch and the trigger can be pulled inwardly.
3. The trigger assembly of claim 1 wherein the attachment mechanism comprises:
(a) a lever rod having a cuff end and a paddle end, the cuff end attached to the trigger half-cylinder free edge to pivot paraxially to the system axis;
(b) a paddle having a bearing end and free end, the paddle bearing end attached to the lever rod paddle end to pivot paraxially to the system axis, the paddle bearing end having an elongated, convex bearing surface extending paraxially to the system axis, the bearing surface shaped as an eccentric cam in cross-section; and
(c) an elongated, concave bearing surface adjacent to the pole half-cylinder free edge, the concave bearing surface bisected by a notch aligned with the lever rod;
(d) whereby, after the trigger half-cylinder free edge and the pole half-cylinder free edge are pivoted together, the lever is pivoted toward the pole half-cylinder until the lever rod is within the pole half-cylinder notch and the paddle bearing surface is abutting the pole half-cylinder bearing surface, and the paddle free end is pushed inwardly to cause the cammed pole half-cylinder bearing surface to force the trigger half-cylinder free edge and the pole half-cylinder free edge together securely.
4. The trigger assembly of claim 3 wherein at least one of the lever rod cuff end attachment and the lever rod paddle end attachment includes a pin that rotates paraxially to the system axis and the rod is threaded to turn into a threaded hole in the pin.
5. The trigger assembly of claim 1 wherein the hub has an inner surface that is textured.
6. The trigger assembly of claim 1 wherein the hub has an inner surface and an insert attached to the inner surface.
7. A trigger assembly for a projectile launcher comprising:
(a) a cylindrical hub having a central system axis and an inner surface, the hub comprised of a trigger half-cylinder with a hinge edge and a free edge and a pole half-cylinder with a hinge edge and a free edge, the trigger half-cylinder hinge edge and the pole half-cylinder hinge edge being attached by a hinge to pivot paraxially with the system axis;
(b) an insert attached to the inner surface;
(c) an attachment mechanism for securing the trigger half-cylinder free edge and the pole half-cylinder free edge together;
(d) a trigger mechanism mounted in a trigger housing on the trigger half-cylinder, the trigger housing having an outer surface, the trigger mechanism comprising:
(1) an elongated trigger having a first end and a second end, an approximately 90° bend to a stem at the first end, the stem having a pivot end opposite the bend, the pivot end being mounted in the trigger housing to pivot perpendicularly to the system axis, the second end extending back and outwardly from the trigger housing;
(2) a release bar with a trigger end and a catch end, the release bar mounted to reciprocate paraxially with the system axis in a channel in the trigger housing, the trigger end mounted to pivot perpendicularly to the system axis at the trigger bend;
(3) a spring mounted to bias the release bar forwardly; and
(4) a catch mounted in the trigger housing to pivot perpendicularly to the system axis and having an arm extending away from the pivot, the catch pivoting between a capture position wherein the arm extends outwardly and rearwardly and forming a notch with a hollow on the trigger housing outer surface, and a release position wherein the arm extends generally forwardly, the catch having a ledge such that, when in the capture position, the catch end of the release bar overhangs the ledge to prevent pivoting of the catch;
(e) latch mechanism comprising:
(1) a latch mounted in the trigger housing outside of the trigger to pivot perpendicularly to the system axis, the latch having a hook finger with a forward facing hook notch with an inside wall and latch release lever extending outwardly and rearwardly;
(2) a latch pin extending transversely through a slot in the trigger rearwardly of the stem bend; and
(3) a spring biasing the latch in a latched position where the latch pin is in the hook notch, preventing the trigger from being pulled inwardly;
(f) whereby, when the latch release lever is pushed outwardly to an unlatched position, the latch pin is not in the hook notch and the trigger can be pulled inwardly, and when the trigger is pulled inwardly, the release bar is pulled rearwardly away from the catch ledge, permitting the catch to pivot forwardly.
8. The trigger assembly of claim 7 wherein the attachment mechanism comprises:
(a) a lever rod having a cuff end and a paddle end, the cuff end attached to the trigger half-cylinder free edge to pivot paraxially to the system axis;
(b) a paddle having a bearing end and free end, the paddle bearing end attached to the lever rod paddle end to pivot paraxially to the system axis, the paddle bearing end having an elongated, convex bearing surface extending paraxially to the system axis, the bearing surface shaped as an eccentric cam in cross-section; and
(c) an elongated, concave bearing surface adjacent to the pole half-cylinder free edge, the concave bearing surface bisected by a notch aligned with the lever rod;
(d) whereby, after the trigger half-cylinder free edge and the pole half-cylinder free edge are pivoted together, the lever is pivoted toward the pole half-cylinder until the lever rod is within the pole half-cylinder notch and the paddle bearing surface is abutting the pole half-cylinder bearing surface, and the paddle free end is pushed inwardly to cause the cammed pole half-cylinder bearing surface to force the trigger half-cylinder free edge and the pole half-cylinder free edge together securely.
9. The trigger assembly of claim 8 wherein at least one of the lever rod cuff end attachment and the lever rod paddle end attachment includes a pin that rotates paraxially to the system axis and the rod is threaded to turn into a threaded hole in the pin.