Acceleration sensor core unit, method for preventing deflection of substrate on which acceleration sensor is mounted

摘要

PROBLEM TO BE SOLVED: To suppress bending of a substrate. An acceleration sensor core unit 1 includes a substrate 3 and metal plates 4 and 5. The substrate 3 is made of epoxy resin, and an acceleration sensor 11 for detecting vibration acceleration in the direction of the arrow 105 is mounted. The substrate 3 is sandwiched between the metal plates 4 and 5 in a sandwich manner. Ring-shaped metal spacers 7a to 7c are interposed between the substrate 3 and the metal plate 4, and ring-shaped metal spacers 8a to 8c are interposed between the substrate 3 and the metal plate 5, respectively. Since the substrate 3 and the metal plates 4 and 5 are screwed in three places, the substrate 3 can be fixed to the metal plates 4 and 5 with less space and with certainty. Thereby, the rigidity as the acceleration sensor core unit 1 can be secured. [Selected figure] Figure 2