US 12,306,213 B2
Current sensor
Keisuke Nakayama, Miyagi-ken (JP); Takahiro Taoka, Miyagi-ken (JP); and Manabu Tamura, Miyagi-ken (JP)
Assigned to Alps Alpine Co., Ltd., Tokyo (JP)
Filed by Alps Alpine Co., Ltd., Tokyo (JP)
Filed on Oct. 10, 2022, as Appl. No. 17/962,969.
Application 17/962,969 is a continuation of application No. PCT/JP2021/016065, filed on Apr. 20, 2021.
Claims priority of application No. 2020-094424 (JP), filed on May 29, 2020.
Prior Publication US 2023/0032086 A1, Feb. 2, 2023
Int. Cl. G01R 19/00 (2006.01); G01R 15/20 (2006.01)
CPC G01R 15/205 (2013.01) [G01R 19/0092 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A current sensor comprising:
a bus bar through which a current to be measured flows;
a nut configured to fasten an external terminal to the bus bar by bringing the external terminal and the bus bar into contact with each other;
a magnetic sensor configured to detect a magnetic field generated by the current to be measured when flowing through the bus bar;
a case member having a housing for the magnetic sensor, the case member enclosing the bus bar and the nut therein; and
a cover member disposed over the housing,
wherein the nut has an end facing the bus bar and a through hole for receiving a bolt,
wherein the case member has an opening such that another end of the nut faces the opening, whereby the through hole is in communication with the opening, and
wherein the current sensor further comprises:
an insulative protective member covering the opening and engaging with a surface of the case member around an entire outer periphery of the opening, thereby enclosing the opening.