Patent ID: 11635072

Abstract:
A pump (10) includes: a flat plate (20); a piezoelectric element (21); a flat plate (30); a side wall (40); a support member (22); a support member (32); a shielding plate (500); a ventilation hole (23); a ventilation hole (33); a film valve (61); and a film valve (62). The film valve (61) is arranged in a region where the flat plate (20) and the shielding plate (500) face each other. The film valve (62) is arranged in a region where the flat plate (30) and the shielding plate (500) face each other. A center side of one of the film valve (61) and the film valve (62) is fixed in a state in which an outer edge side is movable, and the outer edge side of the other is fixed in a state in which the center side is movable.