Circuit board fixing element

A circuit board fixing element, for fixing a circuit board on a sheet, the fixing element comprising:

• a fixing portion;
• a buckling portion, made of a resilient material;
• and
• a connecting portion, connected between the fixing portion and the buckling portion, and having two opposite ends and a side surface connected to the ends, wherein the fixing portion and the buckling portion are respectively located on the ends and protrude from the side surface;
• wherein a shape of the fixing portion is strip-like, and the fixing portion has a plane, a first end face, and a second end face, the plane is connected between the first end face and the second end face, the connecting portion is located at the plane, and a distance between the connecting portion and the first end face is smaller than a distance between the connecting portion and the second end face.