Patent ID: 7661413

Claim:
A fuel supply pump comprising: a plunger for pressurizing fuel; a cam disposed below the plunger; a tappet structure disposed between the cam and the plunger for transmitting rotational force of the cam as raising force to the plunger; and a spring for applying lowering force to the plunger, wherein the tappet structure comprises a spring seat that contacts an end portion of the spring, a roller that contacts the cam, and a tappet body disposed with a roller housing portion in which the roller is housed, the roller being housed in the roller housing portion in a state where an outer peripheral surface of the roller and a sliding surface of the roller housing portion can slide, and a pressure adjusting member interposed between the tappet body and the plunger, the pressure adjusting member dispersing load force and being constructed separately from the spring seat, the plunger, and the tappet body.