Loudspeaker and mobile body device having loudspeaker mounted thereon

A loudspeaker, comprising:

• a frame having an outer side surface and an inner side surface;
• a diaphragm including:
• a planer diaphragm having a front surface that is flat and a rear surface that is flat and is disposed at a side opposite to the front surface;
• and a reinforcing diaphragm made of resin, connected to the planer diaphragm, and having a thick portion formed on an outer periphery of the reinforcing diaphragm and a recessed portion formed at a center side with respect to the thick portion, the diaphragm being disposed inside of the frame;
• an edge connecting portion for connecting an outer peripheral end portion of the diaphragm and the frame to each other;
• a magnetic circuit having a magnetic gap, disposed at a position that opposedly faces the recessed portion, the magnetic circuit being fixed to the frame;
• a voice coil body having a first end portion and a second end portion, the first end portion being disposed inside of the magnetic gap, and the second end portion being joined to a center portion of the diaphragm;
• a terminal fixed to the frame;
• and
• a relay line which electrically connects the terminal and the voice coil to each other,
• wherein:
• the planer diaphragm has a reinforcing material layer made of metal, the reinforcing material layer being disposed on the rear surface of the planer diaphragm, and
• the reinforcing diaphragm has an insulating portion formed at a bottom of the recessed portion, the insulating portion being disposed between the reinforcing material layer and the relay line.

A loudspeaker, comprising:

• a frame having an outer side surface and an inner side surface;
• a diaphragm including:
• a planer diaphragm having a front surface that is flat and a rear surface that is flat and is disposed at a side opposite to the front surface;
• and a reinforcing diaphragm made of resin, connected to the planer diaphragm, and having a thick portion formed on an outer periphery of the reinforcing diaphragm and a recessed portion formed at a center side with respect to the thick portion, the diaphragm being disposed inside of the frame;
• an edge connecting portion for connecting an outer peripheral end portion of the diaphragm and the frame to each other;
• a magnetic circuit having a magnetic gap, disposed at a position that opposedly faces the recessed portion, the magnetic circuit being fixed to the frame;
• a voice coil body having a first end portion and a second end portion, the first end portion being disposed inside of the magnetic gap, and the second end portion being joined to a center portion of the diaphragm;
• a terminal fixed to the frame;
• and
• a relay line which electrically connects the terminal and the voice coil to each other,
• wherein:
• the planer diaphragm has a reinforcing material layer made of metal, the reinforcing material layer being disposed on the rear surface of the planer diaphragm, and
• the reinforcing diaphragm has an insulating portion formed outside the recessed portion, the insulating portion being disposed between the reinforcing material layer and the relay line.