| 摘要 |
PURPOSE: A cylindrical button is provided to reduce production costs by not adding a separate LED for preventing an LED layer to be concentrated to a specific site. CONSTITUTION: A character is formed in one side of a cap(110). A guide(120) is connected to the other side of the cap. A transmission part is formed as a conical cone shape and is installed inside the guide. Light transmits the guide. An LED(160) emits the light in order to light the character formed in the cap. The transmission part prevents the light emitted from the LED to be concentrated to a specific site the character formed in the cap. The LED is attached to a printed circuit board. One side of a switch is combined to the guide and the other side of the switch is attached to the printed circuit board.
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