Force adjustment device for staple gun and staple gun having the same

A force adjustment device adapted to be mounted to a staple gun, the staple gun including a housing unit that has an accommodation space, a staple-strike piece that is disposed in the accommodation space and that is movable along an up-down direction, a force storage unit that is disposed in the accommodation space and that is operable to resiliently bias the staple-strike piece, a handle unit that is pivotably mounted to the housing unit, and a resilient unit that is disposed in the accommodation space and that is operable to resiliently bias the handle unit, said force adjustment device comprising:

• a guide member that is adapted to be disposed in the accommodation space, and that has a first end adapted to be adjacent to the staple-strike piece, a second end opposite to said first end, and an abutment surface extending from said first end to said second end, said second end being higher in position than said first end in the up-down direction;
• and
• an adjustment unit that includes an adjustment member adapted to be disposed in the accommodation space, and movably disposed on said abutment surface, and an operation member adapted to be disposed in the accommodation space and extend therefrom to an external environment;
• wherein said adjustment member is adapted to abut against and limit a range of movement of the force storage unit, and
• wherein said operation member is operable to urge said adjustment member to move to different positions on said abutment surface, so as to adjust the range of movement of the force storage unit.