US 12,241,915 B2
Electric current sensor
Gota Saito, Sendai (JP); Masuto Saito, Sendai (JP); Tetsuya Yoshinari, Sendai (JP); and Noritaka Niiyama, Sendai (JP)
Assigned to TOKIN CORPORATION, Miyagi (JP)
Appl. No. 18/032,376
Filed by TOKIN CORPORATION, Shiroishi (JP)
PCT Filed Oct. 25, 2021, PCT No. PCT/JP2021/039298
§ 371(c)(1), (2) Date Apr. 18, 2023,
PCT Pub. No. WO2022/092027, PCT Pub. Date May 5, 2022.
Claims priority of application No. 2020-178746 (JP), filed on Oct. 26, 2020.
Prior Publication US 2023/0384351 A1, Nov. 30, 2023
Int. Cl. G01R 15/18 (2006.01); H01F 38/30 (2006.01)
CPC G01R 15/183 (2013.01) [H01F 38/30 (2013.01)] 10 Claims
OG exemplary drawing
 
1. An electric current sensor comprising an upper shield case, a lower shield case, a press-fit member and an inner member, wherein:
the upper shield case has at least an upper surface and an upper outer peripheral portion;
the upper surface has an opening at its inside;
the upper outer peripheral portion extends downward in an up-down direction from an outer edge of the upper surface;
the lower shield case has at least a lower surface and a lower outer peripheral portion;
the lower surface has an opening at its inside;
the lower outer peripheral portion extends upward in the up-down direction from an outer edge of the lower surface;
at least one of the upper shield case and the lower shield case has an inner peripheral portion which extends along the up-down direction from the opening of the at least one of the upper shield case and the lower shield case;
the upper shield case and the lower shield case form an accommodating portion;
the press-fit member has a main portion;
the main portion pushes both of the upper outer peripheral portion and the lower outer peripheral portion outward in a horizontal plane perpendicular to the up-down direction to integrally fix the upper shield case and the lower shield case to each other;
the inner member comprises a coil and an electromagnetic core; and
the inner member is arranged between the main portion and the inner peripheral portion in the accommodating portion.