A Caulking Gun with Multi-gear and Adjustable Thrust Ratio

A caulking gun with multi-gear and adjustable thrust ratio comprising:

• a fixed handle, a rotating trigger, a caulk tube mounting barrel, a pusher plate and a pusher rod, and a rotating trigger, the connecting part of which is pivotally connected to the fixed handle through a gear adjustment mechanism so that the rotating trigger is rotated around the connection within a range of angle, and the upper end close to the pusher plate of the rotating trigger is separately driven to and pushes the pusher plate so that the pusher plate can push the caulk tube installed in the caulk tube mounting barrel at an adjustable thrust ratio, under an action of the rotating trigger, wherein the gear adjustment mechanism comprises:
• a sliding groove, which is a hollow structure located on two sides of the rotating trigger, running through along a depth direction to form two symmetrical sliding groove openings on two sides, with each sliding groove opening being formed by at least two successively connecting locating holes with same diameter forming a set of limiting teeth in an adjacent joint, wherein the narrowest width of the junction of these successively connecting locating holes is the passing width of the limiting teeth, which is slightly larger than the minimum width of the segmented cylinder fixed pin, but is smaller than the diameter of the locating holes;
• a segmented circular limiting hole located on the fixed handle, which is accommodated inside the connection part of the rotating trigger, so that the segmented circular limiting hole is placed in and covered by the sliding groove;
• a segmented cylinder fixed pin which passes through the segmented circular limiting hole along the depth direction of the sliding groove and locked by the segmented circular limiting hole, with both ends of the segmented cylinder fixed pin respectively extending out from the corresponding sliding groove opening.