| 摘要 |
PROBLEM TO BE SOLVED: To prevent connecting failure in the connector by restraining a sensor connector from rising in the temperature by heat of a sensor element in an oxygen sensor. SOLUTION: An oxygen sensor 11 has a sensor element 12 containing an element main body 20 and a heater 21, a first case 14 to fix the element 12 and a second case 15 fitted and fixed to the case 14. One end parts of lead parts 26 and 27 are connected to an electrode of the element main body 20 and the heater 21. The other end parts of the lead parts 26 and 27 are inserted into a vacuum chamber 17 formed in the second case 15. The other end parts of the respective lead parts 26 and 27 are fixed to a sensor connector 16 integrally formed in the second case 15, and are connected to respective terminals 28 and 29 arranged in the connector 16. In the respective lead parts 26 and 27, a part positioned inside the vacuum chamber 17 is formed in a coil shape, and a heat radiating part 18 having a recess-projection shape is formed in a side wall part of the second case 15. |
