Hinge type bistable magnetic circuit structure and magnetic latching relay

Patent metadata

Field	Value
Publication number	US-12394583-B2
Application number	US-202218261536-A
Country	US
Kind code	B2
Filing date	Jan 13, 2022
Priority date	Jan 15, 2021
Publication date	Aug 19, 2025
Grant date	Aug 19, 2025

Abstract

A hinge type bistable magnetic circuit structure, including a coil assembly, an L-shaped armature, an L-shaped yoke and a permanent magnet the L-shaped armature is configured on a side of the L-shaped yoke after rotating 180 degrees, and the two are together formed a frame-shaped profile, at two opposite diagonals of the frame-shaped profile, a junction is provided with a pre-set first gap; the L-shaped yoke includes a first and a second yoke portion, the coil assembly is arranged at and cooperated with the first yoke portion, one end of the permanent magnet is connected with the first yoke portion; the L-shaped armature includes a first and a second armature portion, the first armature portion is configured to cooperated 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.

First claim

What is claimed is:

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.

2. The hinge type bistable magnetic circuit structure according to claim 1 , wherein the first armature portion of the L-shaped armature and the first yoke portion of the L-shaped yoke are on two opposite sides of the frame; one end of the permanent magnet is perpendicular to and is connected with the first yoke portion of the L-shaped yoke in an interior of the frame enclosed by the L-shaped armature and the L-shaped yoke; and two end surfaces of the permanent magnet are magnetic pole surfaces.

3. The hinge type bistable magnetic circuit structure according to claim 2 , wherein an inner side surface of a tail end of the first armature portion of the L-shaped armature is configured to correspond to an end surface of the second yoke portion of the L-shaped yoke, and an inner side surface of a tail end of the first yoke portion of the L-shaped yoke is configured to correspond to an end surface of the second armature portion of the L-shaped armature.

4. The hinge type bistable magnetic circuit structure according to the claim 3 , wherein the bistable magnetic circuit comprises a first magnetic circuit passing through the permanent magnet, a section of the first armature portion of the L-shaped armature, the second yoke portion of the L-shaped yoke, a section of the first yoke portion of the L-shaped yoke, and a second magnetic circuit passing through the permanent magnet, another section of the first armature portion of the L-shaped armature, the second armature portion of the L-shaped armature, and another section of the first yoke portion of the L-shaped yoke.

5. The hinge type bistable magnetic circuit structure according to the claim 4 , wherein;
in the bistable magnetic circuit, the L-shaped armature is in a stable state when the inner side surface of the tail end of the first armature portion of the L-shaped armature is in contact with the end surface of the second yoke portion of the L-shaped yoke so that a first gap at one of the two opposite diagonals of the frame is smaller than a first gap at the other one of the two opposite diagonals; and
the L-shaped armature is in another stable state when the inner side surface of the tail end of the first yoke portion of the L-shaped yoke is in contact with the end surface of the second armature portion of the L-shaped armature so that the first gap at the other one of the two opposite diagonals of the frame is smaller than the first gap at the one of the two opposite diagonals.

6. The hinge type bistable magnetic circuit structure according to claim 2 , wherein the permanent magnet is located between the middle of the first yoke portion of the L-shaped yoke and the middle of the first armature portion of the L-shaped armature.

7. The hinge type bistable magnetic circuit structure according to claim 6 , wherein a length of the first armature portion of the L-shaped armature is greater than a length of the second armature portion of the L-shaped armature; and a length of the first yoke portion of the L-shaped yoke is greater than a length of the second yoke portion of the L-shaped yoke.

8. The hinge type bistable magnetic circuit structure according to claim 1 , wherein the first armature portion of the L-shaped armature is configured to use the other end of the permanent magnet as a rotational support point, so that the first armature portion is capable of swinging to cooperate with the L-shaped yoke, thereby achieving a seesaw type movement.

9. The hinge type bistable magnetic circuit structure according to claim 8 , wherein:
a projecting first projection is provided on an end surface of the other end of the permanent magnet, the first projection is integrally formed with the permanent magnet, the first projection of the permanent magnet is abutted against an inner side surface of the first armature portion of the L-shaped armature, so that the first armature portion of the L-shaped armature is configured to use the other end of the permanent magnet as a rotational support point to be capable of swinging to cooperate with the L-shaped yoke; or
a projecting second projection is provided on an inner side surface of the first armature portion of the L-shaped armature, and the second projection is integrally formed with the first armature portion, the second projection of the first armature portion of the L-shaped armature is configured to abut against an end surface of the other end of the permanent magnet, so that the first armature portion of the L-shaped armature is configured to use the other end of the permanent magnet as a rotational support point to be capable of swinging to cooperate with the L-shaped yoke; or
a magnetic conductor is provided between the other end of the permanent magnet and the first armature portion of the L-shaped armature, one end of the magnetic conductor connected with the first armature portion of the L-shaped armature is provided with a projecting third projection, the third projection is integrally formed with the magnetic conductor, so that the first armature portion of the L-shaped armature is configured to use a corresponding end of the magnetic conductor as a rotational support point to be capable of swinging to cooperate with the L-shaped yoke.

10. The hinge type bistable magnetic circuit structure according to claim 8 , wherein;
a limit rotation shaft is provided on each side of the first armature portion of the L-shaped armature in a width direction, and a center line of the limit rotation shaft is vertically intersected with a connecting line or an extension line of the connecting line from one end to the other end of the permanent magnet and passing through the rotational support point; and
the bobbin is provided with a fourth projection extending toward the first armature portion of the L-shaped armature, the fourth projection is provided with a groove adapted to the limit rotation shaft of the first armature portion of the L

Assignees

• Xiamen Hongfa Electric Power Controls Co Ltd

Inventors

• Zhong Shuming
• He Zhongbo
• Chi Yan
• Dai Wenguang

Classifications

• H01H2050/446

  Details of the insulating support of the coil, e.g. spool, bobbin, former · CPC title

• H01H2050/367

  Methods for joining separate core and L-shaped yoke · CPC title

• H01H50/46

  Short-circuited conducting sleeves, bands, or discs {(for electromagnets H01F7/1205)} · CPC title

• H01H50/36

  Stationary parts of magnetic circuit, e.g. yoke · CPC title

• H01H51/2272

  comprising rockable armature, rocking movement around central axis parallel to the main plane of the armature (H01H51/2227 takes precedence) · CPC title