Abstract: A piezoelectric power generation device comprises a power generation element which includes a support body having a plate-like planar portion with first and second opposed main surfaces and a projecting portion projecting from a center portion of the second main surface. The first projecting portion has an outer periphery when seen in plan view along a direction perpendicular to the first main surface. A piezoelectric body is provided on the first surface and overlaps the first projecting portion when the first support body is seen in plan view along a direction perpendicular to the first main surface. A plurality of legs extend from the plate like planar portion away from the piezoelectric body. The legs are located radially outward of the periphery of the first projecting portion when the first support body is seen in plan view along a direction perpendicular to the first main surface.

Abstract: A piezoelectric power generation device comprises a power generation element which includes a support body having a plate-like planar portion with first and second opposed main surfaces and a projecting portion projecting from a center portion of the second main surface. The first projecting portion has an outer periphery when seen in plan view along a direction perpendicular to the first main surface. A piezoelectric body is provided on the first surface and overlaps the first projecting portion when the first support body is seen in plan view along a direction perpendicular to the first main surface. A plurality of legs extend from the plate like planar portion away from the piezoelectric body. The legs are located radially outward of the periphery of the first projecting portion when the first support body is seen in plan view along a direction perpendicular to the first main surface.

Abstract: A vibrating gyroscope includes a vibrator. The vibrator is installed on a work plate via supporting members. A work cover is installed on the work plate so as to cover the vibrator. The vibrator, the work plate, and the work cover are installed on one main surface of a circuit board. Both end portions of the work cover and both end portions of the circuit board are surrounded by two cushion members. The work cover, the circuit board, and the cushion members are contained in a case. Though bottom faces and top faces of the cushion members respectively touch a surface of a packing on a bottom board of the case and an inside face of a case body, the work cover and the circuit board do not touch the case.