| 摘要 |
PROBLEM TO BE SOLVED: To provide a dynamic speaker provided with a wooden diaphragm with excellent mass-productivity and an excellent acoustic characteristic. SOLUTION: A manufacturing process flowchart of the wooden diaphragm in the dynamic speaker of a structure employing the wooden diaphragm of approximately a horn shape includes the steps of: (a) adhering a cloth or Japanese paper on one surface of a wooden sheet to make the wooden sheet to be an adhered sheet; (b) providing an approximately V-shaped notch to the wooden sheet; (c) wetting and softening the wooden sheet, and impregnating the wooden sheet with a lubricant, the lubricant acting to keep water in the wooden sheet; (d) overlapping edge portions of the notch so as to be latched and kept in an approximately horn shape and applying a first hot press molding to the overlapped parts to tentatively mold them in an approximately horn shape; (e) drying the wooden sheet; (f) impregnating the wooden sheet with a thermosetting resin; (g) half-drying the wooden sheet; (h) applying a second hot press molding to the adhered sheet wherein the thermosetting resin is in a half-drying state; (i) applying a moisture-proof agent to both sides of the wooden sheet; and (j) removing a center hole for a voice coil and periphery from the wooden sheet to make a speaker diaphragm having a predetermined dimension and shape. COPYRIGHT: (C)2004,JPO&NCIPI
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