Hinge type bistable magnetic circuit structure and magnetic latching relay

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.