PRESSURE SENSOR

To provide a pressure sensor which can prevent breakage, etc., of a piezoelectric element and facilitate an assembling work.SOLUTION: The pressure sensor comprises: a cylindrical housing H for defining an axis line S; a diaphragm 50 which is fixed to the tip of the housing and receives the pressure of a pressure medium; a pressure detection member 90 composed of a first electrode 91, a piezoelectric substance 92, and a second electrode 93 which are sequentially laminated in the axial direction from the tip side inside the housing; and a first lead wire 110 and a second lead wire 120 which are connected to the first and second electrodes, respectively. The first electrode 91 includes a first body part 91a having a first bonding surface which is bonded to the piezoelectric substance, and a first extension part 91b extending from an edge region of the first body part by being bent to the side opposite the first bonding surface, and connected to the first lead wire. The second electrode 93 includes a second body part 93a having a second bonding surface which is bonded to the piezoelectric substance, and a second extension part 93b extending from an edge region of the second body part by being bent to the side opposite the second bonding surface, and connected to the second lead wire.SELECTED DRAWING: Figure 7 【課題】圧電素子の破損等を防止し組み付け作業も容易に行える圧力センサを提供する。【解決手段】圧力センサは、軸線Ｓを画定する筒状のハウジングＨ、ハウジングの先端側に固定されて圧力媒体の圧力を受けるダイヤフラム５０、ハウジングの内側において先端側から軸線方向に順次積層された第１電極９１、圧電体９２、及び第２電極９３からなる圧力検出部材９０、第１電極及び第２電極にそれぞれ接続された第１リード線１１０及び第２リード線１２０を備え、第１電極９１は、圧電体に接合される第１接合面を有する第１本体部９１ａ、第１本体部の縁部領域から第１接合面と反対側に屈曲して伸長し第１リード線に接続される第１延出部９１ｂを含み、第２電極９３は、圧電体に接合される第２接合面を有する第２本体部９３ａ、第２本体部の縁部領域から第２接合面と反対側に屈曲して伸長し第２リード線に接続される第２延出部９３ｂを含む。【選択図】図７