Relay magnetic circuit structure and relay

Abstract

The utility model discloses a relay magnetic circuit structure and a relay, comprising a coil assembly, a first yoke, a second yoke, and a rocker armature which is rotatably arranged between the first yoke and the second yoke through a rotating shaft structure and is used in cooperation with the first yoke and the second yoke. A rotating fulcrum of the rocker type armature is eccentrically arranged so that the rocker type armature can form a long force arm end opposite to the first yoke and a short force arm end opposite to the second yoke, the long force arm end is configured to be in a normally-open state with the first yoke, and the short force arm end is configured to be in a normally-closed state with the second yoke. A first permanent magnet is arranged on the pole face side of the long force arm end, a second permanent magnet is arranged on the pole face side of the short force arm end, and the magnetic force of the second permanent magnet is larger than that of the first permanent magnet. According to the utility model, the magnetic circuit structure adopts a double-magnetic-steel structure, the magnetic forces of the two magnetic steels are different, and the two magnetic steels are also asymmetrically arranged, so that compared with a seesaw type balanced magnetic circuit structure, the magnetic circuit structure is more flexible in attraction control.

Description

TECHNICAL FIELD

[0001] The utility model relates to a relay technical field, concretely relates to a relay magnetic circuit structure and relay. BACKGROUND

[0002] As a kind of control component, electromagnetic relay is widely used in aerospace, automobile, household appliance, industrial control and other fields, with the improvement of environmental protection consciousness, and the requirement of relay small size, high reliability of application end, polarized relay has been more applied, compared with conventional electromagnetic relay, mainly permanent magnet is added to magnetic circuit structure, by the cooperation of coil excitation and permanent magnet, it is easier to realize the characteristics of low power consumption, miniaturization.Pivot balance magnetic circuit is widely used in polarized relay, its magnetic circuit is usually symmetrical structure, but the counterforce generated in contact system is usually unbalanced, so other series of measures are usually added to realize good matching of suction force and counterforce, thereby increasing the manufacturing cost of product. CONTENT OF UTILITY MODEL

[0003] In view of the deficiency of prior art, the utility model provides a kind of relay magnetic circuit structure, the magnetic circuit structure adopts double magnetic steel structure, and the magnetic force of two magnetic steels is not identical, and the arrangement is also asymmetrically set, compared with pivot balance magnetic circuit structure, it is more flexible in the control of suction force, in the design, debugging stage, the trend of suction force curve can be controlled by changing the size and relative position of two magnetic steels, to achieve the good matching effect of unbalanced counterforce of relay contact system, to ensure the contact reliability and vibration resistance of its contact system.

[0004] To achieve the above purpose, the utility model is realized by the following technical schemes:

[0005] A kind of relay magnetic circuit structure, including coil assembly, first yoke and second yoke respectively connected to the two ends of coil assembly and pivot balance armature rotatably arranged between first yoke and second yoke by pivot structure and cooperatively used with first yoke and second yoke, the rotation fulcrum of pivot balance armature is eccentric to make pivot balance armature form long force arm end oppositely arranged with first yoke and short force arm end oppositely arranged with second yoke, and first permanent magnet is arranged on the pole face side of long force arm end, second permanent magnet is arranged on the pole face side of short force arm end, and the magnetic force of second permanent magnet is greater than that of first permanent magnet.

[0006] Further, first yoke and second yoke are both L-shaped structure, first yoke is formed with first matching end for cooperating with long force arm end of pivot balance armature, and second yoke is formed with second matching end for cooperating with short force arm end of pivot balance armature.

[0007] Further, long force arm end is configured as always open with first yoke, and short force arm end is configured as always close with second yoke.

[0008] Further, the length of the second engaging end is greater than that of the first engaging end.

[0009] Further, the first permanent magnet is arranged at or near the center of the length of the reed armature.

[0010] Further, the rotation pivot of the reed armature is deviated to the side of the second yoke.

[0011] Further, the long force arm end of the reed armature and the first permanent magnet form a first part, and the short force arm end of the reed armature and the second permanent magnet form a second part, and the weight of the first part is configured to be approximately balanced with the weight of the second part.

[0012] Further, the reed armature comprises an armature body and a rotation seat fixedly connected to the bottom of the armature body, a rotation shaft mounting hole is formed in the rotation seat, a rotation shaft is connected to the rotation shaft mounting hole, and a first embedding groove and a second embedding groove are formed in the rotation seat on both sides of the rotation shaft mounting hole, the first permanent magnet and the second permanent magnet are fixedly embedded in the first embedding groove and the second embedding groove respectively, a non-magnetic shaft support is connected between the first yoke and the second yoke, and the rotation shaft is rotationally connected to the shaft support.

[0013] Further, a riveting column is arranged on the rotation seat, a riveting hole is formed in the armature body, and the rotation seat is fixedly connected to the bottom of the armature body through riveting cooperation of the riveting column and the riveting hole.

[0014] Based on the same inventive concept, the utility model also provides a relay, which comprises the relay magnetic circuit structure of any one of the above.

[0015] The above technical scheme has the following advantages or beneficial effects:

[0016] In the relay magnetic circuit structure and the relay, the magnetic circuit structure adopts a double-magnetic-steel structure, the magnetic forces of the two magnetic steels are different, and the two magnetic steels are arranged in an asymmetric manner; compared with a reed balanced magnetic circuit structure, the magnetic circuit structure is more flexible in control of suction force, and in the design and debugging stage, the trend of the suction force curve can be controlled by changing the sizes and relative positions of the two magnetic steels, so that a good matching effect of the non-balanced reaction force of the relay contact system is achieved, and thus the contact reliability and vibration resistance of the contact system are ensured. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is a perspective structural schematic view of a relay of an embodiment of the utility model.

[0018] Figure 2 is a structural sectional view of the relay of the embodiment of the utility model.

[0019] Figure 3 is a schematic diagram of a relay magnetic circuit structure of an embodiment of the present application.

[0020] Figure 4 is a schematic diagram of a structure of a buckled plate type armature in a breaking state in a relay magnetic circuit structure of an embodiment of the present application.

[0021] Figure 5 is a schematic diagram of a structure of a buckled plate type armature in a attracted state in a relay magnetic circuit structure of an embodiment of the present application.

[0022] Figure 6 is a schematic diagram of an exploded structure of a magnetic circuit structure of an embodiment of the present application.

[0023] Figure 7 is a schematic diagram of an exploded structure of a buckled plate type armature of an embodiment of the present application.

[0024] Figure 8 is a magnetic field distribution diagram of a relay magnetic circuit structure of an embodiment of the present application when the plate type armature is in a breaking state.

[0025] Figure 9 is a magnetic field distribution diagram of a relay magnetic circuit structure of an embodiment of the present application when the plate type armature is in an attracted state.

[0026] Label explanation:

[0027] 1, coil assembly, 2, first yoke, 3, second yoke, 4, buckled plate type armature, 5, first permanent magnet, 6, second permanent magnet, 7, shaft support, 21, first matching end, 31, second matching end, 41, armature body, 42, rotating seat, 43, rotating shaft, 421, rotating shaft mounting hole, 422, first embedding groove, 423, second embedding groove, 424, riveting column. DETAILED DESCRIPTION

[0028] The present application will be further described below in conjunction with the drawings and embodiments.

[0029] In the description of the present application, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0030] Please refer to the drawings Figure 1 to the drawings Figure 9The utility model discloses a kind of relay magnetic circuit structures, including coil assembly 1, first yoke 2 and second yoke 3 respectively connected at the both ends of coil assembly 1 and the deflection of bimetallic strip armature 4 being rotatably arranged between first yoke 2 and second yoke 3 and being used with first yoke 2 and second yoke 3 by rotating shaft structure, the rotating fulcrum of deflection of bimetallic strip armature 4 is eccentric (i.e.

[0031] Please refer to the attached drawings Figure 1 to the attached drawings Figure 9 Among them, in a more preferred embodiment, first yoke 2 and second yoke 3 are both L-shaped structure, first yoke 2 is formed with first matching end 21 for cooperating with the long force arm end of deflection of bimetallic strip armature 4, and second yoke 3 is formed with second matching end 31 for cooperating with the short force arm end of deflection of bimetallic strip armature 4.

[0032] Please refer to the attached drawings Figure 1 to the attached drawings Figure 9Wherein in a preferred embodiment, the rotation pivot of the flap armature 4 is biased to the side of the second yoke 3, and the length of the second matching end 31 is greater than that of the first matching end 21. The first permanent magnet 5 is arranged at or near the center of the flap armature 4 in the length direction. In this embodiment, the first permanent magnet 5 with small volume (weight) and small magnetic force is arranged at or near the center of the flap armature 4 in the length direction (i.e. on the normally open end face), and the second permanent magnet 6 with large volume (weight) and large magnetic force is arranged on the short force arm end (i.e. on the normally closed end face). The main consideration is that the armature at the normally closed end is subjected to the reaction force of the feedback of the contact system to a certain extent, so the armature at the normally closed end must have sufficient holding force to maintain the stability of the contact system. By arranging the second permanent magnet 6 with large magnetic force on the normally closed end face of the armature, the holding force of the normally closed state can be effectively increased to improve the contact reliability and vibration resistance. The main principle is that after the second permanent magnet 6 with large magnetic force is arranged near the normally closed end face, the magnetic leakage of the magnetic steel is reduced, the second magnetic circuit (additional magnetic circuit generated by the second permanent magnet 6) of the normally closed end face is mainly enhanced, and the main magnetic circuit generated by the coil energization is also increased to a certain extent. The magnetic field density of the normally closed end face is increased, and finally the holding force is increased. The first permanent magnet 5 with small magnetic force arranged at or near the center of the flap armature 4 in the length direction can appropriately strengthen the suction force in the suction process, but will not cause excessive suction force at the end of the suction.

[0033] Please refer to the attached drawings Figure 7 to the attached drawings Figure 9 Wherein in a preferred embodiment, the long force arm end of the flap armature 4 and the first permanent magnet 5 combine to form a first part, and the short force arm end of the flap armature 4 and the second permanent magnet 6 combine to form a second part. The weight of the first part is configured to be approximately balanced with the weight of the second part. In this way, a structure with unbalanced force arms but balanced mass is formed to improve the sensitivity and vibration resistance of the armature action.

[0034] Please refer to the attached drawings Figure 3 to the attached drawings Figure 7 Wherein in a preferred embodiment, the flap armature 4 includes an armature body 41 and a rotating seat 42 fixedly connected to the bottom of the armature body 41. A rotating shaft mounting hole 421 is formed in the rotating seat 42, and a rotating shaft 43 is connected to the rotating shaft mounting hole 421. First and second embedding grooves 422 and 423 are formed on the rotating seat 42 on both sides of the rotating shaft mounting hole 421. The first and second permanent magnets 5 and 6 are respectively embedded and fixed in the first and second embedding grooves 422 and 423. A non-magnetic shaft support 7 is connected between the first and second yokes 2 and 3, and the rotating shaft 43 is rotatably connected to the shaft support 7.

[0035] Please refer to the attached drawings Figure 3 to the attached drawingsFigure 7 In one preferable embodiment, the rotating seat 42 is provided with a riveting column 424, and the armature body 41 is provided with a riveting hole, and the rotating seat 42 is fixedly connected at the bottom of the armature body 41 through riveting cooperation of the riveting column 424 and the riveting hole. However, those skilled in the art should understand that in other embodiments, the rotating seat 42 and the armature body 41 can also be connected through other conventional connecting structures, and are not limited to the specific embodiments disclosed in the present embodiment.

[0036] Please refer to the accompanying drawings Figure 1 to the accompanying drawings Figure 9 In one embodiment of the present application, a relay is also provided, which comprises the relay magnetic circuit structure of any one of the above embodiments.

[0037] The above description is only used to illustrate the technical solutions of the present application, and is not limited thereto. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that the technical solutions recorded in the foregoing embodiments can be modified, or some technical features can be replaced by equivalent features. These modifications or replacements do not cause the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and therefore all other embodiments obtained by those skilled in the art without creative labor are within the protection scope of the present application.

Claims

1. A relay magnetic circuit structure, comprising a coil assembly (1), a first yoke (2) and a second yoke (3) respectively connected to both ends of the coil assembly (1), and a seesaw armature (4) rotatably disposed between the first yoke (2) and the second yoke (3) via a rotating shaft structure and used in conjunction with the first yoke (2) and the second yoke (3), characterized in that: The rotation fulcrum of the seesaw armature (4) is eccentrically arranged so that the seesaw armature (4) is formed with a long lever arm end arranged opposite to the first yoke (2) and a short lever arm end arranged opposite to the second yoke (3), and a first permanent magnet (5) is provided on the pole face side of the long lever arm end, and a second permanent magnet (6) is provided on the pole face side of the short lever arm end, and the magnetic force of the second permanent magnet (6) is greater than that of the first permanent magnet (5).

2. The relay magnetic circuit structure according to claim 1, characterized in that: The first yoke (2) and the second yoke (3) are both L-shaped structures. The first yoke (2) is formed with a first mating end (21) for mating with the long lever arm end of the seesaw arm (4), and the second yoke (3) is formed with a second mating end (31) for mating with the short lever arm end of the seesaw arm (4).

3. The relay magnetic circuit structure according to claim 2, characterized in that: The long arm end is configured to be in a normally open state with the first yoke (2), and the short arm end is configured to be in a normally closed state with the second yoke (3).

4. The relay magnetic circuit structure according to claim 2, characterized in that: The length of the second mating end (31) is greater than that of the first mating end (21).

5. The relay magnetic circuit structure according to claim 1, characterized in that: The first permanent magnet (5) is arranged at the center position of the seesaw armature (4) in the length direction or close to the center position thereof.

6. The relay magnetic circuit structure according to claim 1, characterized in that: The rotation fulcrum of the rocker armature (4) is biased toward one side of the second yoke (3).

7. The relay magnetic circuit structure according to claim 1, characterized in that: The long lever arm end of the seesaw arm (4) is combined with the first permanent magnet (5) to form a first part, and the short lever arm end of the seesaw arm (4) is combined with the second permanent magnet (6) to form a second part. The weight of the first part is configured to be roughly balanced with the weight of the second part.

8. The relay magnetic circuit structure according to any one of claims 1 to 7, characterized in that: The seesaw armature (4) comprises an armature body (41) and a rotating seat (42) fixedly connected to the bottom of the armature body (41); a rotating shaft mounting hole (421) is provided on the rotating seat (42); a rotating shaft (43) is connected to the rotating shaft mounting hole (421); and two first embedded grooves (422) and second embedded grooves (423) are provided on the rotating seat (42), which are respectively located on both sides of the rotating shaft mounting hole (421); a first permanent magnet (5) and a second permanent magnet (6) are respectively embedded and fixed in the first embedded groove (422) and the second embedded groove (423); a non-magnetic shaft frame (7) is connected between the first yoke (2) and the second yoke (3); and the rotating shaft (43) is rotatably connected to the shaft frame (7).

9. The relay magnetic circuit structure according to claim 8, characterized in that: The rotating seat (42) is provided with a rivet post (424), the armature body (41) is provided with a rivet hole, and the rotating seat (42) is fixedly connected to the bottom position of the armature body (41) through riveting cooperation between the rivet post (424) and the rivet hole.

10. A relay, characterized in that: The relay magnetic circuit structure comprises the relay magnetic circuit structure according to any one of claims 1 to 9.

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