| 摘要 |
PROBLEM TO BE SOLVED: To provide a pressure sensor applying a preload accurately, when caulking each end of an outer cylindrical member and an inner cylindrical member for storing a circular pressure detection element. SOLUTION: An outer diameter of a plate packing 5 is formed larger than an outer diameter of the pressure detection element 6, and set to be 90% or more of an outer diameter of a caulking part of the inner cylindrical member. When reduction part 2a of the inner cylindrical member 2 is bent to caulk a projection part 3a of the outer cylindrical member 3, caulking is performed by driving a die 15 in a domain where the plate packing 5 is not laminated on the pressure detection element 6. Although a non-laminated domain is pressed strongly in comparison with a laminated part, a caulking part 2e and the projection part 3a are supported by a side face of the plate packing 5, and caulked so as not to generate spring back. Hereby, the caulking part 2e becomes flat, and undesired deformation of other part is prevented, and preload application to the pressure detection element 6 is performed accurately. COPYRIGHT: (C)2010,JPO&INPIT
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