Abstract: A pneumatic caulking gun includes a gun body, an air valve, a control unit, a trigger, a barrel, a push plate, a connecting base, a safety valve, and a push rod. Thus, the trigger is pressed to fill the pressurized air with the barrel successively to push the push plate forward to compress and squeeze the silicone gel, thereby injecting the silicone gel outward from the nozzle of the barrel automatically. In addition, the user only needs to slightly press the trigger by his one hand to squeeze the silicone gel outward, thereby facilitating the user operating the caulking gun, and thereby saving the manual work.

Abstract: A caulking gun includes a gun body, a push rod, a push plate, an adjusting knob, and a piston lever. Thus, the adjusting knob is rotated to move away from the push plate to increase the incline angle of the push plate, so that the push plate is locked on the push rod in a tilt manner to lock and move the push rod without having to replace the push plate, thereby enhancing the lifetime of the caulking gun.

Abstract: A caulking gun includes a gun body, a push rod, a push plate, an adjusting seat, a driving member, and an elastic member. Thus, the adjusting seat is movable in the gun body by rotation of the driving member to adjust the incline angle of the push plate by guidance of the tapered urging face of the adjusting seat so as to increase the incline angle of the locking hole of the push plate, so that the locking hole is locked on the push rod in a tilt manner so as to lock and move the push rod, without having to replace the push plate, thereby enhancing the lifetime of the caulking gun.

Abstract: A glue gun includes a triggering mechanism which is formed of a push piece, an action piece, a control lever, a retaining piece, and a release knob. As the action piece is activated by the control lever, and the push piece is actuated by the action piece to push an activation rod to move toward a glue container. When the release knob is activated, the activation rod is released by the retaining piece so as to be forced by the spring force of a recovery spring to move away from the glue container.

Abstract: A glue dispensing gun includes a barrel, a center rod, an eccentric transmission member, and a trigger. The barrel is used to accommodate a glue container and is provided with a receiving slot in which the eccentric transmission member is located such that the eccentric transmission member is fastened to the trigger. The eccentric transmission member is formed of a guide block, a bearing and a push block. The guide block is actuated by the trigger to turn eccentrically so as to cause the push block to push a pushing piece of the center rod, thereby resulting in the forward movement of the center rod. The center rod is provided with a recovery spring and a retaining piece which is in contact with the bearing of the eccentric transmission member, thereby enabling the trigger to control the forward and the backward motions of the center rod.