Abstract: A stapler includes a body, first and second shafts connected to the body, a staple driver having a hooked hole, an elastic unit elastically driving the staple driver, an operation lever inserted by the first shaft, a third shaft making the operation lever pivotably connected with a pivotably connecting member, a hook member having a second hole wherein the second shaft is inserted, an elongated hole wherein the third shaft is inserted, and a hook portion releasably hooked at the hooked hole, and a fourth shaft making the pivotably connecting member pivotably connected with the hook member in a way that the fourth shaft is slidably abutted against a shaft displacement limiting portion when the hook member is swung. A first distance is defined between the first and third shafts, and a second distance smaller than the first distance is defined between the third and fourth shafts.

Abstract: A stapler includes a body, first and second shafts connected to the body, a staple driver having a hooked hole, an elastic unit elastically driving the staple driver, an operation lever inserted by the first shaft, a third shaft making the operation lever pivotably connected with a pivotably connecting member, a hook member having a second hole wherein the second shaft is inserted, an elongated hole wherein the third shaft is inserted, and a hook portion releasably hooked at the hooked hole, and a fourth shaft making the pivotably connecting member pivotably connected with the hook member in a way that the fourth shaft is slidably abutted against a shaft displacement limiting portion when the hook member is swung. A first distance is defined between the first and third shafts, and a second distance smaller than the first distance is defined between the third and fourth shafts.

Abstract: A stapler includes left and right shells, a front shell, a staple magazine, an urging plate and a controlling switch. The left and right shells are connected with each other, such that a receiving space is defined therebetween. The front shell is connected with front portions of the left and right shells and provided with an opening in communication with the receiving space. The staple magazine is detachably disposed in the receiving space and the urging plate is disposed in front of the staple magazine. The controlling switch is reciprocally slidably disposed in the opening of the front shell and adapted to adjust a gap between the staple magazine and the urging plate for fitting various staples having different thickness. Because the front side of the front shell is seamless without connective joint, the stapler is strong in structure and durable in use.