| CPC G01D 11/245 (2013.01) [G01C 19/5769 (2013.01); G01C 21/166 (2020.08); H01R 12/72 (2013.01); H05K 1/148 (2013.01); G01D 11/30 (2013.01); H05K 2201/09163 (2013.01)] | 8 Claims |

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1. A sensor device comprising:
a first rigid board having a first mounting surface and a first side, the first side being configured with a first protrusion and a base, the base linearly extending along a first direction, the first protrusion outwardly protruding along a second direction from a first extending linear line, the base being located directly adjacent to the first protrusion along the first direction, the second direction being perpendicular to the first direction;
a first sensor mounted on the first mounting surface;
a second rigid board having a second mounting surface;
a second sensor mounted on the second mounting surface;
a first flexible board connecting the second rigid board and a part of the first side of the first rigid board; and
a casing housing the first rigid board, the second rigid board, and the first flexible board with the first flexible board bent,
wherein an entirety of the first protrusion does not overlap the first flexible board when viewed along a normal direction with respect to the first mounting surface of the first rigid board and along the second direction.
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