Pioneer Corporation

Tohoku Pioneer Corporation

Tohoku Pioneer Electronic Corporation

Kazuki Yuze

Hiroyuki Kobayashi

Koji Takayama

Shinichi Hayasaka

It is an object of the present invention to use a simplified structure to improve a strength of a neck portion of a conical diaphragm in the vicinity of a voice coil fixing section, thereby inhibiting an undesired dividing vibration in a speaker device. The speaker device of the present invention comprises: a generally conical diaphragm having an opening formed in a generally central position thereof; a voice coil bobbin fixed in the inner circumferential portion of the foregoing opening of the diaphragm; and a diaphragm reinforcing annular member disposed near a fixing section fixing together the diaphragm and the voice coil bobbin. The annular member includes, in the form of an integrally formed body, a diaphragm reinforcing portion having an inclined surface which contacts an inclined surface of the diaphragm close to the inner circumferential portion thereof and is fixed to the inclined surface of the diaphragm by virtue of an adhesive agent, and a cylindrical portion having a liquid holding portion which is formed between the voice coil bobbin and the annular member and is filled with the adhesive agent.

Speaker device

A cross-sectionally substantially-semicircular portion of an edge portion adapted to connect an outer periphery of a diaphragm to a speaker frame is configured to have an uneven-thickness structure in which the thickness of the portion gradually decreases toward a sticking portion of an outer peripheral portion of the speaker frame from a sticking portion of the outer periphery of the diaphragm. Thus, the propagation characteristic of vibrations generated on the edge portion is improved. Disturbance is prevented from occurring in an mid-range frequency characteristic due to inverse resonance caused by the edge portion.

Growing community of inventors

Yamagata, Japan

Kazuki Yuze