| 摘要 |
The present invention provides an EGR sensor capable of stably holding an actuating shaft of a product without increasing the length of the actuating shaft in its longitudinal direction and shortening the movable range of the actuating shaft, and capable of preventing the water stagnated in the EGR sensor from affecting contacting portions of conductive parts, such as electrodes or terminals. The EGR sensor comprises a substrate 3 having a slider 10 slidable thereon, and having a plurality of external lead-out terminals and electrodes, a bearing 7c having an actuating shaft 8 passing therethrough, and a casing having a receiving portion 1a for receiving the substrate 3 and the slider 10. When the casing is attached, the 7c bearing is located downwardly. A communicating passage 7d comprising a groove or a hole is provided at the side of the bearing 1a. The communicating passage 7d is located lower than a position where external lead-out terminals or electrodes of the substrate 3 received in the receiving portion 1a are attached. The communicating passage leads to the insertion hole 7b from the inside of the receiving portion 1a. The moisture stagnated in the receiving portion 1a is drained through the communicating passage 7d to the outside.
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