US 12,394,583 B2
Hinge type bistable magnetic circuit structure and magnetic latching relay
Shuming Zhong, Xiamen (CN); Zhongbo He, Xiamen (CN); Yan Chi, Xiamen (CN); and Wenguang Dai, Xiamen (CN)
Assigned to Xiamen Hongfa Electric Power Controls Co., Ltd., Xiamen (CN)
Appl. No. 18/261,536
Filed by Xiamen Hongfa Electric Power Controls Co., Ltd., Xiamen (CN)
PCT Filed Jan. 13, 2022, PCT No. PCT/CN2022/071856
§ 371(c)(1), (2) Date Jul. 14, 2023,
PCT Pub. No. WO2022/152219, PCT Pub. Date Jul. 21, 2022.
Claims priority of application No. 202110054313.5 (CN), filed on Jan. 15, 2021.
Prior Publication US 2024/0087827 A1, Mar. 14, 2024
Int. Cl. H01H 50/24 (2006.01); H01H 50/36 (2006.01); H01H 50/44 (2006.01)
CPC H01H 50/24 (2013.01) [H01H 2050/367 (2013.01); H01H 2050/446 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A hinge type bistable magnetic circuit structure, comprising:
a coil assembly, an L-shaped armature, an L-shaped yoke, and a permanent magnet, wherein;
the L-shaped armature is configured on a side of the L-shaped yoke, and the L-shaped armature and the L-shaped yoke together form a frame;
at two opposite diagonals of the frame, a junction of the L-shaped armature and the L-shaped yoke is provided with a pre-set first gap;
the L-shaped yoke comprises a first yoke portion and a second yoke portion which are together formed an L shape, the coil assembly is arranged at and cooperated with the first yoke portion, and one end of the permanent magnet is connected with the first yoke portion of the L-shaped yoke; and
the L-shaped armature comprises a first armature portion and a second armature portion which are together formed an L shape, the first armature portion of the L-shaped armature is configured to cooperate with the other end of the permanent magnet so as to be able to perform a seesaw type movement, thereby forming a bistable magnetic circuit between the permanent magnet and the structurally asymmetrical L-shaped armature and the L-shaped yoke, and realizing a switching between two stable states of the bistable magnetic circuit by using an excitation of the coil assembly; and
the coil assembly comprises a bobbin and an enameled wire wound in a winding window of the bobbin, the first yoke portion of the L-shaped yoke is inserted in a core mounting hole of the bobbin, in the middle of the winding window, the bobbin is provided with a permanent magnet mounting hole facing the first armature portion of the L-shaped armature, the permanent magnet mounting hole is communicated with the core mounting hole, and the permanent magnet is fitted in the permanent magnet mounting hole of the bobbin.