| 摘要 |
PURPOSE:To prevent a state wherein a defective in contacting between a movable contact and a fixed contact is caused since dust and water do not enter the gap between an elastic swell part and a circuit board fixed on a keyboard chassis even when entering the device from gaps between keys. CONSTITUTION:The keys 16 are fixed directly on plural elastic swell parts 15, so even if the dust, water, etc., enter the device from the gaps between the keys 16, neither the dust nor the water intrudes the gap between the elastic swell part 15 and the circuit board 13 fixed on the keyboard chassis 12 to prevent the state wherein the contacting defect between the movable contact 17 formed on the reverse surface of the elastic swell part 15 and the fixed contacts 18 and 18 formed on the circuit board 13 is caused. |
