Printed circuit board used as voice coil, method for manufacturing the same and loudspeaker with the same

A method for manufacture a print circuit board used as a voice coil comprises:

• providing N board units, where N≥1, each board unit having a first electrically connecting region and a second electrically connecting region, each board unit having a first circuit structure, a base, and a second circuit structure arranged from top to bottom, each first circuit structure starting in the first electrically connecting region, spiraling around and closing to the second electrically connecting region, and ending in the first electrically connecting region, each second circuit structure starting in the second electrically connecting region, spiraling around and away from the second electrically connecting region, and ending in the first electrically connecting region;
• stacking the N board units, the first electrically connecting regions being stacked over one another, and the second electrically connecting regions being stacked over one another;
• starting points in the first electrically connecting regions of the first circuit structures of the board units being staggered, and starting points in the second electrically connecting regions of the second circuit structures of the board units being staggered, ending points in the second electrically connecting regions of the first circuit structures of the board units being staggered, and ending points in the first electrically connecting regions of the second circuit structures of the board units being staggered;
• and
• in each board unit, electrically connecting in series the first circuit structure and the second circuit structure in the second electrically connecting region, in each two adjacent board units, electrically connecting in series the first electrically connecting region of the second circuit structure of an upper board unit and the first electrically connecting region of the first circuit structure of a lower board unit.

A loudspeaker comprises a printed circuit board used as a voice coil, the printed circuit board comprising N board units stacked over one another, where N≥1, the printed circuit board having a top surface and a bottom surface opposite to the top surface, each board unit having a first electrically connecting region and a second electrically connecting region, all of the first electrically connecting regions being stacked over one another, all of the second electrically connecting regions being stacked over one another, each board unit having a first circuit structure, a base, and a second circuit structure arranged from top to bottom, in each two adjacent board units, the first electrically connecting region of the second circuit structure of an upper board unit being electrically connected in series with the first electrically connecting region of the first circuit structure of a lower board unit, in each board unit, the first circuit structure being electrically connected in series with the second circuit structure in the second electrically connecting region, each first circuit structure starting in the first electrically connecting region, spiraling around and closes to the second electrically connecting region, and ending in the second electrically connecting region, each second circuit structure starting in the second electrically connecting region, spiraling around and away from the second electrically connecting region, and ending in the first electrically connecting region, each first circuit structure and second circuit structure spiraling around the second electrically connecting region along a clockwise direction or a counterclockwise direction, starting points in the first electrically connecting regions of the first circuit structures of the board units being staggered, and starting points in the second electrically connecting regions of the second circuit structures of the board units being staggered, ending points in the second electrically connecting regions of the first circuit structures of the board units being staggered, and ending points in the first electrically connecting regions of the second circuit structures of the board units being staggered.