| 摘要 |
A key module according to an embodiment of the present invention comprises: a circuit board including two outer dome switches which are positioned separately, a center dome switch which is positioned between the outer dome switch, and a point light source which is positioned between the outer dome switch and the center dome switch and generates light; an outer key which is provided at the upper portion of the circuit board, pressurizes the outer dome switches by a push operation, and has a center hole formed at the center; a center key, a part of which penetrates the center hole of the outer key, protrudes to the upper portion of the outer key, and pressurizes the center dome switch by a push operation; and a fixing flange which transfers the pressing force of the center key to the center dome switch between the circuit board, and the center key and the outer key, covers the lower portion of the center key and a support member supporting the outer dome switch and the outer key to be separated, has an outer diameter expanded more than the center key, and prevents the center key from deviating from the center hole, wherein the center key is made of a material allowing light to pass, and the fixing flange has a light transmission portion allowing light to pass in an area overlapped with the center key. |
