Pivotable connection device for connecting paint cup to paint sprayer

A paint sprayer comprising:

• a body having a connection hole, a trigger device and a hose fitting;
• a paint cup connected to the body;
• a connection device pivotably connected between the body and the paint cup such that the paint cup is pivotable relative to the body, the connection device comprising a pivotable member which has an operation portion and a connection portion, a hole defined through the operation portion and a passage defined through the connection portion, the passage communicating with the hole;
• a shaft having a head and a hollow shank, a securing portion connected longitudinally to the shank, an inlet and an outlet defined through a wall of the shank, two seals mounted to the shank and a position notch defined in an outer periphery of the shank, the shaft extending through the hole of the pivotable member and the connection hole in the body, the securing portion extending from the connection hole and a locking member connected to the securing portion to connect the shaft and the pivotable member to the body, the pivotable member being pivotable relative to the shank of the shaft, the inlet communicating with the passage of the pivotable member and the outlet communicating with an interior of the body, and
• a positioning member extending through the body and engaged with the positioning notch in the shank.