Speaker, hearing aid, earphone, and portable terminal device

摘要

A speaker capable of suppressing deterioration of acoustic efficiency while allowing miniaturization of the speaker includes a first unit and a second unit each of which outputs sound. The first unit includes a diaphragm which vibrates back and forth to radiate sound; and plural suspensions which support, at different positions, an outer periphery of the diaphragm. At least one of air passages for channeling sound from the second unit to the outside is provided between the plural suspensions.

主权项

1. A speaker comprising:
a first unit; and a second unit, each of said first unit and said second unit being configured to output sound, wherein said first unit includes a first diaphragm configured to vibrate back and forth so as to radiate sound, and a plurality of suspensions supporting an outer periphery of said first diaphragm at mutually different positions, wherein said plurality of suspensions include a first suspension and a second suspension disposed next to each other in an outer periphery direction of said first diaphragm, an air passage is configured to channel sound outputted from said second unit to the outside, said air passage being disposed between said first suspension and said second suspension, said second unit includes a second diaphragm configured to vibrate back and forth so as to radiate the sound, said first diaphragm and said second diaphragm are arranged in series such that at least part of a membrane surface of one of said first and second diaphragms overlaps with at least part of a membrane surface of the other of said first and second diaphragms, when seen from a vibration direction of said first diaphragm or said second diaphragm, a first sound hole and a second sound hole are disposed in an acoustic port, the sound radiated from said first diaphragm is radiated from the first sound hole, and the sound radiated from said second diaphragm is radiated from the second sound hole, via the at least one air passage.