DRIP-PROOF STRUCTURE OF ELECTRONIC COMPONENT

PROBLEM TO BE SOLVED: To provide a drip-proof structure of electronic component capable of achieving effective drip-proofness and good operability of a knob, while down-sizing a device.SOLUTION: Between the periphery of the opening H1 of first and second cases 20, 70, and the periphery of the exposure port 305 of a cover 300, a packing 250 (250a-250d) is clamped, thus preventing intrusion of liquid from the exposure port 305 of the cover 300 while passing between the first and second cases 20, 70 and cover 300. A shaft 111 is projected from the lateral face of an operation knob 100 on the circuit board 160 side, this shaft 111 is inserted rotatably into the bearing 21 of the first case 20, and a drip-proof processing part B1 is provided at the tip side portion of the bearing 21 into which the shaft 111 is inserted, by filling with grease G, or the like.SELECTED DRAWING: Figure 2 【課題】効果的な防滴が図れ、操作つまみの操作性が良く、装置の小型化を図ることもできる電子部品の防滴構造を提供すること。【解決手段】第１，第２ケース２０，７０の開口Ｈ１の周囲と、カバー３００の露出口３０５の周囲間に、パッキン２５０（２５０ａ〜２５０ｄ）を挟持し、これによってカバー３００の露出口３０５から第１，第２ケース２０，７０とカバー３００の間を通して液体が浸入するのを防止する。操作つまみ１００の回路基板１６０側の側面から軸部１１１を突出し、この軸部１１１を、第１ケース２０の軸受部２１内に回動自在に挿入し、軸部１１１を挿入した軸受部２１の先端側部分にグリスＧの充填等によって防滴処理部Ｂ１を設ける。【選択図】図２