Staple head and surgical stapler

A staple head portion for a surgical stapler, comprising:

• a first forceps holder and a second forceps holder arranged opposite to each other;
• a connecting member that is connected to proximal end sides of the first forceps holder and the second forceps holder, the first forceps holder being rotatable relative to the connecting member;
• a stopper rotatably mounted on the connecting member and comprising a first stop portion;
• and
• a firing mechanism movable along an axial direction of the surgical stapler and comprising a second stop portion;
• wherein
• the firing mechanism can be driven to move in a direction toward the distal end side, such that the first forceps holder rotates to be relatively closed with the second forceps holder;
• when the stopper is in a first state, the first stop portion is located on a path that the second stop portion moves in a direction toward a distal end side;
• and when the stopper is subjected to an external force of a driving member disposed on the first forceps holder to rotate relative to the connecting member in a first direction such that the first stop portion moves in a direction away from an axial center direction of the stapler, the stopper enters a second state, and the first stop portion disengages from the path that the second stop portion moves in the direction toward the distal end side, after the staple head portion is closed and the stopper enters the second state, the firing mechanism can be driven to continue moving in the direction toward the distal end side, so the normal firing of the surgical stapler is achieved.