Ingestible device and information acquisition system for ingestible device

Abstract

An ingestible device 1A at least transmits information by oscillation of the device itself, said ingestible device comprising a housing 10 that can oscillate, a piezoelectric body 20 that is provided inside the housing 10 and that is fixed to the housing 10 in a manner enabling vibration, and an electronic circuit part 30 that is provided inside the housing 10 and that is fixed to the piezoelectric body 20 in a manner enabling oscillation, wherein as the piezoelectric body 20 vibrates in a vibration direction, the housing 10 and the electronic circuit part 30 oscillate toward opposite sides in an oscillation direction.