Piezoelectric pump housing and terminal arrangement

A pump comprising:

• a pump housing having a pump chamber;
• a vibrating plate having a first major surface and facing the pump chamber;
• a piezoelectric device provided on the first major surface and vibrating the vibrating plate;
• and
• a power-feeding plate including a first metal conductor a part of which is exposed to an outside from the pump housing, and a second metal conductor electrically insulated from the first metal conductor,
• wherein the piezoelectric device has a first surface facing the first major surface;
• and a second surface positioned on a side farther from the first major surface,
• wherein the first metal conductor includes a first outer terminal part positioned outside the pump housing;
• a first connecting terminal part electrically connected to the second surface of the piezoelectric device;
• and a first coupling part coupling the first outer terminal part and the first connecting terminal part to each other,
• wherein the second metal conductor includes a second outer terminal part positioned outside the pump housing;
• and a second connecting terminal part electrically connected to the second outer terminal part and to the first surface of the piezoelectric device, wherein the second connecting terminal part contacts the first major surface of the vibrating plate without lead wires, and wherein the second outer terminal part does not abut the second connecting terminal part, and
• wherein the power-feed plate has an opening extending through the power-feed plate in a thickness direction such that the piezoelectric device is exposed through the opening.