| 摘要 |
A cellular phone having a directional speaker is provided to direct a sound emitted from the speaker in certain direction only, thereby reducing noise harm to the third party instead of a user of the cellular phone while preventing speaker holes from being blocked by foreign substance. Central protrusions(33) are upward protruded from a casing of a cellular phone. Round-shaped valley parts are concavely formed by surrounding the central protrusions(33), and are equipped with plural speaker holes. Directional protrusions(32) are upward protruded as surrounding the round-shaped valley parts. Plural blocking wings(34) are disposed so that each section is concentrated on the central protrusions(33). A wing unfolding unit drives the plural blocking wings(34) in order that the wings(34) block the speaker holes by being unfolded toward the directional protrusions(32).
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