Patent ID: 9369791
Filing Date: 2016-06-14
CPC Classification: H04R

Claim Text:
1. An earphone device, comprising: a first speaker unit having a first yoke, a first vibrating film supported by the first yoke, and a first driving part supported in the first yoke, for driving the first vibrating film by an applied voice signal; and a second speaker unit having a second yoke, a second vibrating film supported by the second yoke, and a second driving part supported in the second yoke, for driving the second vibrating film by the applied voice signal, wherein the first and second speaker units are integrally disposed to face each other, with a space between the first and second vibrating films set in an airtight state, and the first and second vibrating films are driven so as to be displaced and vibrated in the same direction, and sound holes are formed in the first speaker unit or the second speaker unit, for transmitting the sound emitted by the vibration of the first and second vibrating films to the outside, wherein in the first speaker unit, the first yoke is formed into a magnetic cup-shape, and a first magnet is fixed in the first yoke, the first vibrating film is fixed to the first yoke with a space between the open end of the first yoke and the first magnet to cover an opening part, and a cylindrical first coil fixed to the first vibrating film is inserted into an outer periphery of the first magnet, with a slight space between them, and in the second speaker unit, the second yoke is formed into a magnetic cup-shape, and a second magnet is fixed in the second yoke, the second vibrating film is fixed to the second yoke with a space between the open end of the second yoke and the second magnet to cover an opening part, and a cylindrical first coil fixed to the second vibrating film is inserted into an outer periphery of the second magnet, with a slight space between them.