Stable and reliable magnetic latching relay

Abstract

The utility model belongs to the technical field of magnetic latching relays, and particularly relates to a stable and reliable magnetic latching relay which comprises a base, a cover plate, a coil assembly, an armature assembly, a movable contact assembly, a static contact assembly, a limiting mechanism and the like. A linkage plate can be accurately positioned when an armature assembly acts, accurate contact and separation of a movable contact and a static contact are ensured, the action accuracy of the relay is greatly improved, the problems of poor contact and the like are reduced, the service life is prolonged, and the working reliability is improved; plastic shrinkage stress during injection molding is effectively dispersed, the size precision and shape stability of the base and the cover plate are guaranteed, and a precise installation foundation is provided for internal assemblies.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of magnetic latching relay, specifically a stable and reliable magnetic latching relay. BACKGROUND

[0002] Magnetic latching relay is a special type of relay, it uses the magnetic field generated by permanent magnet to keep the contact state, the remarkable feature of this kind of relay is low power consumption, after the contact state switching, it can maintain the state without continuous power supply, can effectively save the electric energy, magnetic latching relay is widely used in power system, communication equipment, industrial automation control, intelligent instrument and household appliance and many other fields, can effectively improve the stability and efficiency of system.

[0003] The existing magnetic latching relay is mainly composed of the following parts: iron core, coil, permanent magnet, moving contact, static contact and other components, its working principle is: when the coil is energized, the magnetic field generated interacts with the permanent magnet magnetic field, drives the moving contact and static contact to close or disconnect, after the coil is de-energized, the magnetic field of permanent magnet makes the contact keep in the current state, without continuous power supply.

[0004] At present, the magnetic latching relay in the prior art has the following shortcomings: most of the traditional magnetic latching relays lack effective limiting structure, when the armature assembly acts, the position of the linkage plate cannot be accurately controlled, which leads to deviation of the moving contact and static contact in the process of contact and separation, frequently causes poor contact, virtual connection and other faults, not only reduces the accuracy of relay action, but also greatly shortens the service life of the relay, cannot meet the demand of precision equipment and key control system with high requirement for circuit stability. UTILITY MODEL CONTENTS

[0005] In order to make up for the deficiency of the existing magnetic latching relay, a stable and reliable magnetic latching relay is provided.

[0006] The utility model solves the technical scheme that adopts technical scheme: a stable and reliable magnetic latching relay, including the base that is assembled with coil assembly, armature assembly, moving contact assembly, static contact assembly, the base is fixedly assembled with the cover plate through the lock catch structure, the coil assembly is used for reciprocating pivotal swing of armature assembly to realize the on-off of circuit, the base is assembled with the fixed plate for limiting the armature assembly through the positioning structure, the linkage plate for the linkage connection of armature assembly and moving contact assembly is movably arranged in the base, the moving contact assembly includes moving piece, spring piece, moving contact, the static contact assembly includes static piece, the static piece is provided with static contact, the base and cover plate are provided with the limiting mechanism for limiting the linkage plate.

[0007] Preferably, the limiting mechanism comprises a limiting guide groove fixedly arranged in the base, and a supporting table fixedly arranged on the cover plate and matched with the limiting guide groove, and further comprises an abutting portion on the fixed plate matched with the supporting table.

[0008] Preferably, the base is internally provided with a first rib for preventing injection deformation.

[0009] Preferably, the cover plate is internally provided with a second rib for preventing injection deformation.

[0010] Preferably, the base is internally provided with a grid boss for preventing injection deformation.

[0011] Preferably, the base and the cover plate are internally provided with a creep groove at positions of the moving contact assembly and the stationary contact assembly.

[0012] The utility model discloses the beneficial effects of:

[0013] 1. The limiting mechanism of the utility model through the coordinated action of limiting guide groove, supporting table and abutting portion, can accurately ensure that the linkage plate is always in the accurate position during the operation of armature assembly, which makes the moving contact and the stationary contact can accurately contact and separate, greatly improves the accuracy of the relay operation, effectively reduces the problems such as poor contact, virtual connection of the moving contact and the stationary contact caused by the displacement deviation of the linkage plate, and further significantly improves the service life and working reliability of the relay.

[0014] 2. The grid boss and the first rib arranged in the base, and the second rib arranged in the cover plate, disperse the stress generated by the shrinkage of plastic during injection from multiple dimensions, provide support in different directions, and the first rib and the second rib change the stress distribution on the base and the cover plate respectively, bear part of the shrinkage stress, make the stress distribution uniform, which not only ensures the dimensional accuracy and shape stability of the base and the cover plate after injection, but also provides a precise installation basis for the internal components of the relay and improves the overall performance of the product. BRIEF DESCRIPTION OF DRAWINGS

[0015] The drawings described herein are used to provide further understanding of the utility model and constitute a part of the application. The schematic embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute improper limitation on the utility model. In the drawings:

[0016] Figure 1 It is the structure diagram of the base inside the utility model;

[0017] Figure 2 It is the structure diagram of the base, the moving contact assembly and the stationary contact assembly of the utility model;

[0018] Figure 3 It is the structure diagram of the base of the utility model;

[0019] Figure 4 is the structure diagram of the cover plate and the fixed plate of the utility model;

[0020] Figure 5 is the structure three-dimensional view of the utility model as a whole;

[0021] Legend:

[0022] 1, base; 01, cover plate; 2, coil assembly; 3, armature assembly; 301, fixed plate; 4, moving contact assembly; 401, moving piece; 402, spring piece; 403, moving contact; 5, static contact assembly; 501, static piece; 502, static contact; 6, linkage plate; 7, limiting mechanism; 701, limiting guide slot; 702, supporting table; 703, abutting portion; 8, first rib; 9, second rib; 10, grid boss; 11, creep slot. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0024] Specific embodiments are given below.

[0025] Please refer to Figures 1-5The utility model discloses a stable and reliable magnetic latching relay, including the base 1 of assembly coil assembly 2, armature assembly 3, movable contact component 4, static contact component 5, the base 1 is fixedly assembled with the cover plate 01 through the lock catch structure, coil assembly 2 is used for making armature assembly 3 reciprocating pivot swing and realizes the on-off of circuit, the base 1 is assembled with the fixed plate 301 for the limiting of armature assembly 3 through the positioning structure, the base 1 is movably provided with the linkage plate 6 for the linkage connection of armature assembly 3 and movable contact component 4, movable contact component 4 includes movable sheet 401, spring sheet 402, movable contact 403, static contact component 5 includes static sheet 501, static sheet 501 is provided with static contact 502, the base 1 with cover plate 01 is provided with the limiting mechanism 7 for the limiting of linkage plate 6, the limiting mechanism 7 includes the limiting guide groove 701 of fixed setting in the base 1 and the supporting platform 702 of fixed setting on cover plate 01 and the cooperation of limiting guide groove 701, still include the abutment 703 of cooperation of supporting platform 702 on fixed plate 301, when coil assembly 2 is powered, according to electromagnetic induction principle, the coil will produce the magnetic field, and the magnetic field produces the attraction of armature assembly 3, makes armature assembly 3 swing around its pivot and do reciprocating pivot, and the action of armature assembly 3 drives linkage plate 6 to move, and linkage plate 6 pushes movable sheet 401 again, and movable sheet 401 overcomes the elastic force of spring sheet 402, and makes movable contact 403 and static contact 502 contact or separate, to realize the conduction and cut-off of circuit, and limiting mechanism 7 plays the key positioning role in the whole process, and limiting guide groove 701 limits the displacement of linkage plate 6 in horizontal direction, and supporting platform 702 supports linkage plate 6 from above and is limited, and the abutment 703 on fixed plate 301 cooperates with supporting platform 702, ensures that linkage plate 6 is always in accurate position during the action of armature assembly 3, guarantees that movable contact 403 and static contact 502 can accurately and accurately contact and separate, and this structure design makes the circuit on-off control process of relay stable and reliable, through accurate limiting mechanism 7, greatly improves the accuracy of relay action, reduces movable contact and static contact contact bad, virtual connection and other problems caused by the displacement deviation of linkage plate 6, to improve the service life and working reliability of relay.

[0026] Further, the first rib 8 is arranged on the inner side of the base 1 to prevent deformation caused by injection molding; during the injection molding process, the plastic raw material fills and cools and solidifies in the mold cavity, and due to the shrinkage of the plastic during cooling, the shrinkage may not be uniform at different positions, thereby generating internal stress, and when the internal stress exceeds the yield strength of the base material, deformation of the base will occur. The first rib 8 forms a reinforcing structure on the inner side of the base 1, which can change the stress distribution state, and when the plastic shrinks, the first rib 8 can bear part of the shrinkage stress and disperse the stress to the entire rib structure, making the stress distribution more uniform and avoiding deformation of the base caused by local stress concentration. At the same time, the presence of the first rib 8 increases the overall stiffness of the base 1, so that it can better maintain shape stability when subjected to various forces during the injection molding process.

[0027] Further, the second rib 9 is arranged on the inner side of the cover plate 01 to prevent deformation caused by injection molding; during the injection molding process, the cover plate 01 also faces the problem of deformation caused by cooling shrinkage, similar to the first rib 8 on the inner side of the base 1. The second rib 9 forms a reinforcing structure on the inner side of the cover plate 01, and when the plastic cools and shrinks in the mold, the second rib 9 can bear and disperse the shrinkage stress. The rigidity of the second rib 9 makes the shrinkage deformation of each part of the cover plate more uniform during the shrinkage process, preventing warping, twisting and other deformation phenomena caused by excessive local shrinkage difference. Moreover, the presence of the second rib 9 enhances the overall mechanical strength of the cover plate 01, so that it can better resist external mechanical forces and maintain its shape integrity during assembly and use.

[0028] Further, the grid boss 10 is arranged on the inner side of the base 1 to prevent deformation caused by injection molding; during the injection molding process, the grid boss 10 forms a complex and efficient reinforcing structure on the inner side of the base 1. The shrinkage stress of the plastic will generate multi-directional forces on the base, and the grid-like layout of the grid boss 10 can disperse the shrinkage stress from multiple dimensions. Compared with a single rib structure, it can provide support and stress dispersion in different directions. The horizontal and vertical cross structure of the grid boss 10 forms a rigid frame, and when the plastic shrinks, the stress is dispersed and transmitted within this frame, making the stress borne by each part of the base more uniform. Moreover, the grid boss 10 increases the contact area between the base and the mold cavity wall, and during the cooling process, heat can be more evenly dissipated, further reducing the phenomenon of uneven shrinkage caused by temperature difference, thereby better maintaining the shape stability of the base.

[0029] Further, the base 1 and the inner side of the cover plate 01 are provided with a creepage groove 11 at the position of the moving contact assembly 4 and the static contact assembly 5; in operation, during the operation of the relay, especially in harsh environments such as high voltage and high humidity, leakage current may occur between the moving contact 403 and the static contact 502 along the insulating surface, when the leakage current reaches a certain degree, it may cause a surface discharge phenomenon, which not only affects the normal operation of the relay, but also may cause electrical failure and equipment damage, the provision of the creepage groove 11 increases the distance between the moving contact and the static contact along the insulating surface, that is, the creepage distance, according to the principle of electrical insulation, increasing the creepage distance can improve the anti-surface discharge capability of the insulating material, when the leakage current flows on the insulating surface, the creepage groove 11 forces the current to flow along a longer and more tortuous path, increasing the resistance of the current, thereby reducing the size of the leakage current, increasing the threshold value of the surface discharge, and effectively preventing the occurrence of surface discharge phenomenon.

[0030] In the description of the present specification, the description of the terms "one embodiment", "example", "specific example" and the like means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0031] The basic principles, main features and advantages of the present application have been shown and described above. It should be understood by those skilled in the art that the present application is not limited by the above embodiments, and the above embodiments and descriptions in the specification are only to illustrate the principles of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the claimed present application.

Claims

1. A stable and reliable magnetic latching relay, characterized by: The application relates to a magnetic switch, which comprises a base (1) provided with a coil assembly (2), an armature assembly (3), a movable contact assembly (4) and a static contact assembly (5), a cover plate (01) is fixedly arranged on the base (1) through a locking structure, the coil assembly (2) is used for reciprocating pivoting the armature assembly (3) to realize the on-off of a circuit, a fixing plate (301) for limiting the armature assembly (3) is arranged on the base (1) through a positioning structure, a linkage plate (6) for linking the armature assembly (3) with the movable contact assembly (4) is movably arranged in the base (1), the movable contact assembly (4) comprises a movable sheet (401), a spring sheet (402) and a movable contact (403), the static contact assembly (5) comprises a static sheet (501), the static sheet (501) is provided with a static contact (502), and the base (1) and the cover plate (01) are provided with a limiting mechanism (7) for limiting the linkage plate (6).

2. A stable and reliable magnetic latching relay according to claim 1, characterized in that: The limiting mechanism (7) comprises a limiting guide groove (701) fixedly arranged in the base (1) and a supporting table (702) fixedly arranged on the cover plate (01) and matched with the limiting guide groove (701), and further comprises an abutting portion (703) on the fixing plate (301) and matched with the supporting table (702).

3. A stable and reliable magnetic latching relay according to claim 2, characterized in that: The inner side of the base (1) is provided with a first rib (8) for preventing injection molding deformation.

4. A stable and reliable magnetic latching relay according to claim 1, characterized in that: The inner side of the cover plate (01) is provided with a second rib (9) for preventing injection molding deformation.

5. A stable and reliable magnetic latching relay according to claim 1, characterized in that: The inner side of the base (1) is provided with a grid boss (10) for preventing injection molding deformation.

6. A stable and reliable magnetic latching relay as claimed in claim 1, wherein: The inner side of the base (1) and the cover plate (01) is provided with a creeping groove (11) at the position of the movable contact assembly (4) and the static contact assembly (5).

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