Loudspeaker

A loudspeaker comprising:

• a bottom plate;
• a center pole provided upwardly from the bottom plate;
• a yoke surrounding the center pole and having a plurality of slits;
• a magnet for providing a magnetic flux for the center pole and the yoke;
• a coil provided between the center pole and the yoke;
• a first annular member for supporting the coil;
• a coupling member comprising a plate material folded into an annular shape having a plurality of protruding portions, the coupling member supporting the first annular member, wherein one of the plurality of protruding portions is inserted into two of the plurality of slits;
• and
• a diaphragm supported by the coupling member.

A loudspeaker comprising:

• a bottom plate;
• a center pole provided upwardly from the bottom plate;
• a yoke surrounding the center pole and having a plurality of slits;
• a magnet for providing a magnetic flux for the center pole and the yoke;
• a coil provided between the center pole and the yoke;
• a coupling member comprising a plate material folded into an annular shape having a plurality of protruding portions, the coupling member supporting the coil, wherein one of the plurality of protruding portions is inserted into two of the plurality of slits;
• and
• a diaphragm supported by the coupling member.

A loudspeaker comprising:

• a bottom plate;
• a center pole provided upwardly from the bottom plate;
• a yoke surrounding the center pole and having a plurality of slits;
• a magnet for providing a magnetic flux for the center pole and the yoke;
• a coil provided between the center pole and the yoke;
• a first annular member for supporting the coil;
• a plurality of support members, each having a first end and a second end, for supporting the first annular member at the first ends, the plurality of support members being inserted into the plurality of slits;
• and
• a diaphragm supported by the plurality of support members at the second ends,
• wherein a lower face of each of the plurality of support members has a stepped configuration such that the lower face is lower at the second end than at the first end, and
• the diaphragm supported by the plurality of support members at the second ends is supported at a position below the lower face, at the first end, of each of the plurality of support members.

A loudspeaker comprising:

• a bottom plate;
• a center pole provided upwardly from the bottom plate;
• a yoke surrounding the center pole and having a plurality of slits;
• a magnet for providing a magnetic flux for the center pole and the yoke;
• a coil provided between the center pole and the yoke;
• a first annular member for supporting the coil;
• a plurality of support members for supporting the first annular member, the plurality of support members being inserted into the plurality of slits;
• a diaphragm supported by the plurality of support members;
• and
• a second annular member provided between the plurality of support members and the diaphragm,
• wherein the plurality of support members support the diaphragm via the second annular member, and
• wherein a plurality of thin plates for reinforcing the second annular member are provided at at least one of an inner periphery and an outer periphery of the second annular member.