C-clamp grip pliers

C-clamp grip pliers, comprising:

• a first handle, including a grip portion having a C-shaped cross-section, one end of the grip portion forming a support head portion, another end of the grip portion having a screw hole;
• one side of the support head portion having a side wall, the side wall having a shaft hole;
• a shaft, including a shaft body having a cross section corresponding in shape to the shaft hole, the shaft passing through the shaft hole and being mounted on the support head portion, an axis of the shaft body being defined as a working centerline of the C-clamp grip pliers;
• a restraining jaw, located at a distance from a first side of the side wall of the support head portion and disposed on the shaft, the restraining jaw including a mounting portion, a restraining jaw arm and a first clamping head, the mounting portion leaning against one side of the shaft and being mounted on the shaft, the restraining jaw arm extending from one end of the mounting portion away from the shaft and being above the working centerline, the restraining jaw arm being ⊃-shaped, the first clamping head being disposed on one end of the restraining jaw arm;
• a movable jaw, located at a second side of the side wall of the support head portion, the movable jaw including a movable jaw head portion, a movable jaw arm, a pivot portion, a first pivoting portion, a second clamping head and a pull portion, the movable jaw head portion facing the mounting portion of the restraining jaw and leaning against the same side of the shaft as the mounting portion, the movable jaw arm extending from one end of the movable jaw head portion away from the shaft and being above the working centerline, the pivot portion and the first pivoting portion being disposed on two corners of an edge of another end of the movable jaw head portion and being below the working centerline, the pivot portion being pivotally connected to the support head portion, the first pivoting portion being located at a distance from the support head portion, the movable jaw arm being ⊃-shaped, corresponding to the restraining jaw arm, the second clamping head being disposed on one end of the movable jaw arm;
• the pull portion being disposed between the pivot portion and the first pivoting portion of the movable jaw head portion;
• an elastic member, having one end fixed to the grip portion and another end connected to the pull portion for pulling the movable jaw back after the movable jaw is pivoted;
• a second handle, including a grasping portion, a first pivot pin, a second pivot pin and a third pivot pin, the first pivot pin being disposed on one end of the grasping portion and pivotally connected to the first pivoting portion, the second pivot pin being disposed at a distance from a distal end of the grabbing portion, the third pivot pin being disposed between the first pivot pin and the second pivot pin;
• a release lever, having a middle portion pivotally connected to the second pivot pin, one end of the release lever forming a push portion, another end of the release lever forming a release operation portion;
• a connecting rod, having an arcuate protrusion relative to the push portion, one end of the connecting rod being pivotally connected to the third pivot pin, another end of the connecting rod extending to the grip portion and forming a stop portion;
• a screw rod, screwed to the screw hole, one end of the screw rod being in contact with the stop portion on the grip portion, another end of the screw rod extending out of the screw hole and forming an operation knob.