Title:
LOAD SENSOR AND METHOD FOR MANUFACTURING LOAD SENSOR
Document Type and Number:
WIPO Patent Application WO/2024/070393
Kind Code:
A1
Abstract:
This load sensor 1 for sensing a load in the thickness direction comprises: an upper casing 30 having an upper surface part 31 and a side surface part 32 extending in the thickness direction from the outer circumference of the upper surface part 31; a lower casing 20 having a lower surface part 21 that faces the upper surface part 31 in the thickness direction, the lower casing 20 having a property of being less elastically deformable than the upper casing 30; a piezoelectric vibrator 10 accommodated in a space between the upper casing 30 and the lower casing 20, the piezoelectric vibrator 10 having a piezoelectric substrate 13 provided between the upper surface part 31 and the lower surface part 21, and a pair of excitation electrodes provided on the mutually opposing main surfaces of the piezoelectric substrate 13. The pair of excitation electrodes extend in the thickness direction. One edge from among an edge 35 of the upper casing 30 and an edge 25 of the lower casing 20 is fixed by crimping to the other edge. The elastic deformation of the upper casing 30 due to the crimping causes the upper casing 30 to apply a preload to the piezoelectric vibrator 10 in the thickness direction.
Inventors:
MUROZAKI YUUICHI (JP)
Application Number:
PCT/JP2023/031038
Publication Date:
April 04, 2024
Filing Date:
August 28, 2023
Export Citation:
Assignee:
MURATA MANUFACTURING CO (JP)
International Classes:
G01L1/16
Domestic Patent References:
| WO2017213059A1 | 2017-12-14 |
Foreign References:
| JP2010276532A | 2010-12-09 | |||
| JP2001099859A | 2001-04-13 | |||
| US3541849A | 1970-11-24 |
Attorney, Agent or Firm:
INABA, Yoshiyuki et al. (JP)
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