Pump and fluid supply device

A pump, comprising:

• a sealed chamber;
• a movable wall for changing a volume of the sealed chamber;
• a vibration actuator which can be electromagnetically driven for displacing the movable wall to discharge fluid in the sealed chamber to an outside of the sealed chamber;
• and
• a case containing the vibration actuator therein,
• wherein the vibration actuator includes a movable body which is movable with respect to the case and has a magnet, and a coil core portion fixed to the case,
• wherein three axes perpendicular to each other are respectively defined as an X axis, a Y axis, and a Z axis,
• wherein, when a direction along the X axis is defined as an X axis direction, a direction along the Y axis is defined as a Y axis direction, and a direction along the Z axis is defined as a Z axis direction, an outer shape of the case is an arc shape in a planar view from the Y axis direction,
• wherein the movable body has an arc shape corresponding to the outer shape of the case,
• wherein the coil core portion includes a pair of coils, a plate-like core curved in an arc shape corresponding to the outer shape of the case, and a pair of protruding portions which protrude from the core toward the Z axis direction and around which the pair of coils are respectively wound,
• wherein the case has an arc-shaped upper plate and an arc-shaped bottom plate facing the arc-shaped upper plate,
• wherein the core has an arc-shaped upper surface facing the upper plate of the case and an arc-shaped lower surface fixed on an inner surface of the bottom plate of the case, and
• wherein the pair of protruding portions are provided on the upper surface of the core so as to be spaced apart from each other.