| 摘要 |
PROBLEM TO BE SOLVED: To provide a pressure sensor capable of attaining low cost by applying the constitution that an O-ring and a pressing part are fixed at one process. SOLUTION: This pressure sensor is made of a body 1 formed like a bottomed cylinder having a cylinder internal part 11 and a through-hole 13 on a cylinder bottom 12, an O-ring 2 fitted to the side wall of the through-hole 13, a pressure introduction tube 3 having an axial hole 31 for introducing pressure, and an peripheral part kept in close contact with the O-ring 2 for intrusion into the cylinder internal part 11 of the body 1, and at the same time formed to have a pressure sensor tip 41, a shield plate 5 for shielding the cylinder internal part 11, a fresh air introduction part 6 having a pressing part 62 for pressing one side 61a of the fresh air introduction film 61 for introducing fresh air into the cylinder internal part 11 from the outside, and a cover 9 for sealing the cylinder internal part 11. In this case, the shield plate 5 is laid on the cylinder bottom 12 of the body 1 so that one piece 51 fixes the pressing part 62 fitted to a recess groove 14 provided on the cylinder bottom 12 and the O-ring respectively.
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