| 摘要 |
According to the present invention, an oxygen concentration sensor for detecting an oxygen concentration includes a sensor element having an atmospheric chamber therein, a heater inserted in the atmospheric chamber, and a holder for holding the heater in the atmospheric chamber. The holder includes a cylindrical portion for covering an outer periphery of the heater, and a plurality of cantilever elastic pieces provided at a lower portion of the cylindrical portion. The elastic pieces includes a heater supporting portion elastically contacting with the periphery of the heater and a fixing portion elastically contacting with an inner surface of the sensor element. In this way, it is possible to assemble a heater into a sensor element easily without causing damage to the heater.
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