Abstract: A coil body 30 has a conductive part 32, which is made of a conductive body 31 or of a plurality of conductive bodies 31 arranged side by side in a planar shape, and an insulating part 33 for insulating the conductive part 32. The conductive body 31, or the conductive bodies 31, and the insulating part 33 are arranged in a winding state, thereby a plurality of wound parts 34 that are separated from each other and arranged side by side are formed in the coil body 30. The wound parts 34 are arranged in a manner where each wound part 34 comes into a partial contact with an adjacent one or more of the other wound parts 34 at least when vibrating and is linked by movable linking parts 41 with other ones of the wound parts 34 arranged side by side.

Abstract: A coil body 30 has a conductive part 32, which is made of a conductive body 31 or of a plurality of conductive bodies 31 arranged side by side in a planar shape, and an insulating part 33 for insulating the conductive part 32. The conductive body 31, or the conductive bodies 31, and the insulating part 33 are arranged in a winding state, thereby a plurality of wound parts 34 that are separated from each other and arranged side by side are formed in the coil body 30. The wound parts 34 are arranged in a manner where each wound part 34 comes into a partial contact with an adjacent one or more of the other wound parts 34 at least when vibrating and is linked by movable linking parts 41 with other ones of the wound parts 34 arranged side by side.

Abstract: The invention provides an electroacoustic transducer capable of efficiently carrying out conversion from electric signals to sound or from sound to electric signals at low distortion, which requires no special shape nor processing as a magnet, requires no minute setting of the magnetization direction, and sets a distribution of higher magnetic flux densities for effective action with respect to an electric conductor of an acoustic diaphragm than in a magnet plate magnetized in the radius direction although the production process thereof is remarkably simple as in a magnet plate magnetized in the radius direction.

Abstract: The invention provides an electroacoustic transducer capable of efficiently carrying out conversion from electric signals to sound or from sound to electric signals at low distortion, which requires no special shape nor processing as a magnet, requires no minute setting of the magnetization direction, and sets a distribution of higher magnetic flux densities for effective action with respect to an electric conductor of an acoustic diaphragm than in a magnet plate magnetized in the radius direction although the production process thereof is remarkably simple as in a magnet plate magnetized in the radius direction.

Abstract: An electroacoustic transducer 20, such as a speaker, a headphone, an earphone, a microphone, an acoustic wave sensor, etc., includes magnet plates 21 and 22, the entirety of which are formed like a disk or a ring; and an acoustic diaphragm 23 disposed parallel to said magnet plates 21 and 22 and having a conductor formed on the plane thereof; wherein a component parallel to the vibration plane of said acoustic diaphragm 23 is zero or in the radius direction of said magnet plates 21 and 22 in the direction of magnetizing respective partial areas of said magnet plates 21 and 22, and angles formed by said magnetizing direction with respect to the vibration plane of said acoustic diaphragm 23 are made gradually different from each other in accordance with the distance from the center axis of said magnet plates 21 and 22.

Abstract: The invention provides an electroacoustic transducer such as a speaker, a headphone, an earphone, a microphone, an acoustic wave sensor, etc., which is able to set a distribution of magnetic fluxes capable of uniformly driving the entire diaphragm in a wide range of a conductor formed on the diaphragm and with respect to the vibration direction thereof, does not require any high machining accuracy during production, and is able to efficiently convert electric signals into sounds or sounds into electric signals at a low distortion level.