To provide an acoustic device which has a structure capable of preventing a cone paper part from being deformed and damaged even when a sudden temperature change occurs, and does not apply an influence to a normal sound production operation.SOLUTION: An acoustic device in which an inner space A of a main body case and an outer space B are separated with an oscillation body 15 as a border, includes: an elastic member 21 which is provided at the main body case; a communication hole 4a communicating the inner space A and the outer space B; and a ventilation member 22 which is provided so as to cover the communication hole 4a, permits the passage of air, and blocks the passage of fluid. Further, the acoustic device includes a blocking part 3c arranged so as to be opposite to the elastic member 21. An intermediate space C is separated with the elastic member 21 and the blocking part 3c as a border. In the blocking part 3c, at least one air resistance passage 3d communicating the intermediate space C and the outer space B is formed.SELECTED DRAWING: Figure 3
音響装置
2023-04-17
Patent
Elektronische Ressource
Japanisch
IPC: | H04R LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS , Lautsprecher, Mikrofone, Schallplatten-Tonabnehmer oder ähnliche akustische, elektromechanische Wandler / B60Q ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL , Anordnung von Signal- oder Beleuchtungsvorrichtungen, deren Einbau oder Halterung oder deren Schaltkreise bei Fahrzeugen allgemein |