Clutch cam for pumping device

A clutch cam for a pumping device, the clutch cam configured to be disposed in a housing and coupled to a lever bracket such that the clutch cam rotates together with a lever, the clutch cam comprising:

• a cam part having a cam profile provided along an outer circumferential surface thereof relative to a rotating axis of a center thereof;
• a first protrusion part provided on a side of the cam part, protruding from the side toward the lever bracket, having the same rotating axis as the cam part, and fitted to a fixing hole provided in the lever bracket;
• and
• a second protrusion part provided on the side of the cam part, protruding from the side toward the lever bracket, having the same rotating axis as the cam part, and fitted to an angle determination hole provided in the housing to be rotated relative to the rotating axis,
• wherein, in a process of rotation of the second protrusion part, a portion of the second protrusion part is held by a portion of the angle determination hole such that a maximum rotational angle of the clutch cam is limited,
• wherein the second protrusion part comprises:
• a cylindrical part having the same rotating axis as the cam part and having a cylindrical shape;
• and
• a stopper part provided on a portion of an outer circumferential surface of the cylindrical part and protruding therefrom in a radial direction, and
• wherein the angle determination hole comprises:
• a cylinder part having the same rotating axis as the cam part and having a cylindrical shape such that the cylindrical part of the second protrusion part is fitted thereto;
• and
• a piercing part provided in a shape in which a portion of an inner circumferential surface of the cylinder part is indented in an outer radial direction thereof to be provided at a position corresponding to the stopper part, and defining a section in which the stopper part can be rotated while tracing a predetermined rotation trajectory.