| 摘要 |
PROBLEM TO BE SOLVED: To reduce the mass of an adhesive and to attain reproduction of sound extended up to a high frequency or an ultrahigh frequency range by adhering an inner diameter of a sub cone and a cap simultaneously to an outer diameter of a voice coil bobbin with the adhesive. SOLUTION: An inner diameter part of a damper 10 is inserted to an outer diameter of a voice coil bobbin 8, and the damper 10 is adhered to the voice coil bobbin 8 at its prescribed position with a soft adhesive 11a. Then an inner diameter of a main cone 1 is inserted to an outer diameter of the voice coil bobbin 8, and the main cone 1 is adhered to the outer diameter of the voice coil bobbin 8 at its prescribed position with a soft adhesive 11b. Then an inner diameter of a sub cone 2 is inserted to the outer diameter of the voice coil bobbin 8 and an outer circumference of a cap 12 is fitted to a top of the voice coil bobbin 8. In this case, the outer circumference of the cap 12 is inserted to the inner diameter of the sub cone 2 and adhered at once by means of a conventional light weight adhesive 11f to join the outer circumference of the sub cone 2 to the outer circumference of the main cone 1.
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