Arc extinguishing electromagnetic relay

Abstract

The utility model relates to the technical field of electromagnetic relays, in particular to an arc extinguishing electromagnetic relay. An arc extinguishing electromagnetic relay comprises a base provided with a detachable arc extinguishing magnetic steel assembly in a clamping mode and a clapper type electromagnetic relay arranged on the base. According to the clapper-type electromagnetic relay, the mounting hole is formed in the base of the clapper-type electromagnetic relay, and the detachable arc extinguishing magnetic steel assembly is arranged, so that the arc extinguishing magnetic steel located between the two static contacts can be detached and replaced, the situation that the whole electromagnetic relay is damaged due to the fact that the arc extinguishing magnetic steel loses magnetism in a high-temperature or power-on environment is avoided, and the service life of the clapper-type electromagnetic relay is prolonged. The arc extinguishing magnetic steel assembly is detachable through cooperation of a movable plate capable of moving up and down and an elastic buckling piece located in the protection shell, when the movable plate is located on the upper side, a limiting convex buckle at the tail end of the movable plate is buckled and fixed to the elastic buckling piece, and when the movable plate is located on the lower side, the limiting convex buckle is buckled and fixed to the elastic buckling piece. And the limiting convex buckle and the elastic buckling piece are separated from each other, and the arc extinguishing magnetic steel assembly is detachable.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of electromagnetic relay, especially is a kind of arc extinguishing electromagnetic relay. BACKGROUND

[0002] Electromagnetic relay is a kind of automatic switch with smaller current, lower voltage to control larger current, higher voltage. Its realization this switching function is with the help of electromagnet arranged in the interior, pass through the coil of electromagnet and enter smaller current, so that electromagnet generates magnetic field, uses the generation or disappearance of magnetic field to attract or release armature, and then drive the attraction or disconnection between conductive spring, realize the conduction of large current loop.

[0003] The utility model discloses a kind of clapping high-voltage direct-current electromagnetic relays, by setting arc extinguishing magnetic steel between the two static contacts of relay, the conduction path between electric arc is increased using magnetic force, to effectively extinguish arc, but in the process of applying the clapping high-voltage direct-current electromagnetic relay, the protective shell that the arc extinguishing magnetic steel plays a protective role is generally effective, arc extinguishing magnetic steel is still gradually demagnetized under energization or high temperature environment, so it needs to be periodically replaced, the original fixed connection structure is not conducive to periodically replace the arc extinguishing magnetic steel. UTILITY MODEL CONTENT

[0004] Other features and advantages of the present utility model will be set forth in the following specification and, in part, will be apparent from the description or can be learned by practice of the present utility model. The objectives and other advantages of the present utility model will be realized and attained by the structure particularly pointed out in the written description and the drawings.

[0005] The utility model aims at overcoming the above-mentioned insufficient, provide a kind of arc extinguishing electromagnetic relay, by being set up the detachable arc extinguishing magnetic steel assembly of installation hole being set up on the base of clapping electromagnetic relay, the arc extinguishing magnetic steel between two static contacts can be replaced, avoid in high temperature or energization environment, arc extinguishing magnetic steel loses its magnetism, lead to the damage of entire electromagnetic relay, to improve the use cycle of the electromagnetic relay, the detachable arc extinguishing magnetic steel assembly is realized by the cooperation of movable plate that can move up and down and elastic buckling element in protective shell, when movable plate is located upside, the limiting convex buckle at the end of movable plate is fixed with the elastic buckling element, when movable plate is located downside, limiting convex buckle is disconnected with elastic buckling element, arc extinguishing magnetic steel assembly is detachable.

[0006] This utility model provides an arc-extinguishing electromagnetic relay, including a base with a detachable arc-extinguishing magnet assembly and a snap-action electromagnetic relay disposed on the base. The snap-action electromagnetic relay includes a stationary spring portion, which includes an inlet stationary spring and an outlet stationary spring, each with a stationary contact riveted to it. The base has a mounting hole located between the two stationary contacts. The arc-extinguishing magnet assembly includes a mounting base plate, a mounting slot, a fastener, and an arc-extinguishing magnet. The mounting base plate has the mounting slot, in which the arc-extinguishing magnet is held. The fasteners are located on both sides of the arc-extinguishing magnet. The snap-action electromagnetic relay also has a protective shell with its opening facing downwards and corresponding to the mounting hole. The arc-extinguishing magnet assembly passes through the mounting hole and is fastened to the protective shell by the fasteners.

[0007] The snap-action electromagnetic relay installed on the base performs the basic on / off function of the relay. The added arc-extinguishing magnet assembly places the arc-extinguishing magnet between the two stationary contacts. By magnetic blowing, the conduction path between the arcs is increased, thereby effectively extinguishing the arc. The arc-extinguishing magnet assembly is detachably connected to the base, which is convenient for users to replace the arc-extinguishing magnet regularly to achieve continuous arc extinguishing. The mounting holes provide users with access to the arc-extinguishing magnet assembly from the bottom. The mounting base plate is compatible with the mounting holes to ensure the integrity of the entire base after installation and to prevent leakage. The mounting slots on the mounting base plate are used to fix the position of the arc-extinguishing magnet. The clips on both sides of the arc-extinguishing magnet are engaged with the protective shell to fix the overall position of the arc-extinguishing magnet assembly.

[0008] In some embodiments, the snap-action electromagnetic relay further includes a magnetic circuit portion, which includes a coil frame, an iron core, and a yoke. The coil frame is disposed on the base, and the iron core is disposed between the coil frames. The yoke is disposed on the coil frame and above the iron core. A protective shell extends from the side of the coil frame corresponding to the stationary spring portion, and the protective shell is located between the two stationary contacts. The coil frame, iron core, and yoke constitute the magnetic circuit portion of the electromagnetic relay. By passing a small current through the coil, the electromagnet generates a magnetic field. The generation or disappearance of the magnetic field attracts or releases the armature. For details on the working principle and specific structural composition of the magnetic circuit portion, please refer to the background art documents and existing technologies, which will not be elaborated here. The protective shell disposed on the coil frame is fitted around the arc-extinguishing magnet, protecting the arc-extinguishing magnet from gradual demagnetization under energized and high-temperature environments. At the same time, the protective shell fixes the arc-extinguishing magnet assembly, allowing it to be locked between the two stationary contacts.

[0009] In some embodiments, the snap-action electromagnetic relay further includes a movable spring portion, which includes a movable spring plate with a fork-shaped structure. Movable contacts are riveted to both ends of the fork-shaped movable spring plate, and the movable contacts correspond one-to-one with the stationary contacts. The movable spring plate and its movable contacts are used to cooperate with the stationary contacts to realize the switching on and off of the electromagnetic relay. The movable spring portion is prior art and can be referred to in the background art documents. Its description here is only to maintain the integrity of the technical solution of this application and to avoid omitting necessary technical features.

[0010] In some embodiments, the moving spring portion is mounted on the support surface of the yoke and forms a snap-action linkage mechanism with the magnetic circuit portion. This part is also a technical solution well known to those skilled in the art, and specific details can be found in the background art documents and prior art. The description here is only to maintain the integrity of the technical solution of this application and to avoid missing necessary technical features.

[0011] In some embodiments, the size of the mounting base plate is adapted to the size of the mounting hole. The mounting slot on the mounting base plate is rectangular and has movable grooves on both sides. The arc-extinguishing magnet and the mounting slot are interference-fitted. The mounting base plate and the mounting hole are adapted to ensure the integrity of the entire base after installation and to prevent leakage. The rectangular mounting slot is adapted to the shape of the arc-extinguishing magnet and plays a fixing role. The movable grooves on both sides of the mounting slot are reserved space for the movable plate to move up and down, which facilitates the subsequent installation and disassembly process.

[0012] In some embodiments, the latching member includes a movable plate and a telescopic spring. The movable plate is located on both sides of the arc-extinguishing magnet, and the telescopic spring is provided on the upper side of the movable plate. The movable plate is connected to the upper mounting slot through the telescopic spring, and the movable plate moves up and down within the movable slot. One end of the telescopic spring is connected to the upper mounting slot, and the other end is connected to the movable plate. When downward pressure is applied, the movable plate moves downward; when the pressure is released, the movable plate returns to its original position under the action of the telescopic spring.

[0013] In some embodiments, a disassembly groove is provided on the outer side of the mounting base plate, and guide grooves are vertically provided on both sides of the disassembly groove. The guide grooves correspond in size to the movable groove. The movable plate passes through the guide groove and extends into the disassembly groove. A limiting protrusion is provided at one end of the movable plate, and a connecting plate is provided at the other end of the movable plate. The connecting plate is connected between the two movable plates and located in the disassembly groove. The inwardly recessed disassembly groove facilitates the user's disassembly of the arc-extinguishing magnet assembly. The movable plates on both sides of the arc-extinguishing magnet pass through the guide groove and are connected together by the connecting plate to work together. The user can control the movement of the limiting protrusion at the other end by pressing the connecting plate on the back of the base. The limiting protrusion is used to adapt to the elastic fastener inside the protective shell.

[0014] In some embodiments, elastic fasteners extend inward on both sides of the protective shell. Each elastic fastener includes an elastic snap-fit ​​plate and a return spring. The elastic snap-fit ​​plate includes an integrally connected inclined surface and a snap-fit ​​surface. A strip-shaped fixing groove is provided on the side of the snap-fit ​​surface corresponding to the arc-extinguishing magnet, and the return spring is provided on the other side of the snap-fit ​​surface. The return spring connects the snap-fit ​​surface and the side wall of the protective shell. The elastic snap-fit ​​plate is elastic. When the movable plate is inserted into and abuts against the snap-fit ​​surface, the inclined surface bends, and the movable plate slides into the gap between the elastic snap-fit ​​plate and the arc-extinguishing magnet. Simultaneously, the limiting protrusion at the end of the movable plate engages in the strip-shaped fixing groove, thus fixing the entire arc-extinguishing magnet assembly. When the arc-extinguishing magnet assembly needs to be disassembled, the connecting plate is pressed downward on the mounting base plate. Both movable plates on both sides are driven downward, the limiting protrusion disengages from the strip-shaped fixing groove, and the elastic snap-fit ​​plate returns to its original position under the action of the return spring.

[0015] In some embodiments, when the telescopic spring is in a compressed state, the connecting plate abuts against the top of the disassembly groove, the movable plate is located inside the elastic fastener, and the limiting buckle is engaged in the strip-shaped fixing groove. When the telescopic spring is in a stretched state, the connecting plate abuts against the bottom of the disassembly groove, the movable plate is located below the elastic fastener, and the limiting buckle disengages from the strip-shaped fixing groove.

[0016] In some embodiments, auxiliary fixing plates are further extended on the upper and lower sides of the mounting slot, and these auxiliary fixing plates are in contact with the arc-extinguishing magnet. The auxiliary fixing plates provided on the upper and lower sides of the arc-extinguishing magnet are used to increase the tightness of the connection between the arc-extinguishing magnet and the mounting base plate, and to prevent the arc-extinguishing magnet from falling off the mounting base plate when the arc-extinguishing magnet assembly is removed.

[0017] By adopting the above technical solution, the beneficial effects of this utility model are:

[0018] This invention utilizes a detachable arc-extinguishing magnet assembly with mounting holes on the base of a snap-action electromagnetic relay. This allows the arc-extinguishing magnet located between the two stationary contacts to be replaced, preventing it from losing its magnetism under high temperature or energized conditions, thus avoiding damage to the entire electromagnetic relay and extending its service life. The detachable arc-extinguishing magnet assembly is achieved through a movable plate that can move up and down and an elastic fastener located inside the protective shell. When the movable plate is on the upper side, the limiting protrusion at the end of the movable plate engages with the elastic fastener. When the movable plate is on the lower side, the limiting protrusion disengages from the elastic fastener, and the arc-extinguishing magnet assembly becomes detachable.

[0019] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this disclosure.

[0020] Undoubtedly, such and other objects of this invention will become more apparent after the following detailed description of the preferred embodiments, which are illustrated in various accompanying drawings and illustrations.

[0021] To make the above and other objects, features and advantages of this utility model more apparent and understandable, one or more preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0022] The accompanying drawings are provided to further understand the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation thereof.

[0023] In the accompanying drawings, the same parts use the same reference numerals, and the drawings are schematic and not necessarily drawn to actual scale.

[0024] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only one or more embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on such drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the overall structure of the arc-extinguishing electromagnetic relay in some embodiments of the present invention;

[0026] Figure 2 This is a schematic diagram showing the disassembled parts of the arc-extinguishing electromagnetic relay in some embodiments of this utility model;

[0027] Figure 3 This is a schematic diagram of the overall structure of the arc-extinguishing magnet assembly in some embodiments of the present invention;

[0028] Figure 4 This is a cross-sectional schematic diagram of the arc-extinguishing magnet assembly and protective shell in some embodiments of this utility model.

[0029] Explanation of key figure labels:

[0030] 1. Arc-extinguishing magnet assembly;

[0031] 11. Install the base plate;

[0032] 111. Disassembly groove; 112. Guide groove;

[0033] 12. Install the card slot;

[0034] 13. Fasteners;

[0035] 131. Movable plate; 132. Telescopic spring; 133. Limiting buckle; 134. Connecting plate;

[0036] 14. Arc-extinguishing magnet;

[0037] 15. Movable slot;

[0038] 16. Auxiliary fixing plate;

[0039] 2. Base;

[0040] 3. Static spring section;

[0041] 31. Introduce the stationary spring; 32. Detach the stationary spring; 33. Stationary contact;

[0042] 4. Mounting holes;

[0043] 5. Magnetic circuit section;

[0044] 51. Coil frame;

[0045] 52. Yoke;

[0046] 53. Protective casing;

[0047] 54. Flexible fasteners;

[0048] 541. Elastic buckle plate; 542. Return spring; 543. Strip-shaped fixing groove;

[0049] 6. Moving spring section;

[0050] 61. Moving reed; 62. Moving contact. Detailed Implementation

[0051] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments. It should be understood that the specific embodiments described herein are merely for explaining the present utility model and are not intended to limit the present utility model.

[0052] Furthermore, it should be understood in the description of this utility model that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0053] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral unit; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. However, specifying a direct connection indicates that the two main bodies at the connection point are not connected through a transitional structure, but are simply connected to form a whole through a connecting structure. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0054] In this utility model, unless otherwise expressly specified and limited, the first feature "on" or "below" the second feature may be in direct contact with the first and second features, or indirect contact through an intermediate medium. In the description of this specification, references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0055] Reference Figures 1-2 , Figure 1 This is a schematic diagram of the overall structure of the arc-extinguishing electromagnetic relay in some embodiments of the present invention; Figure 2 This is a schematic diagram showing the disassembled parts of the arc-extinguishing electromagnetic relay in some embodiments of this utility model.

[0056] According to some embodiments of the present invention, the present invention provides an arc-extinguishing electromagnetic relay, including a base 2 on which a detachable arc-extinguishing magnet assembly 1 is mounted, and a snap-action electromagnetic relay disposed on the base 2; the snap-action electromagnetic relay includes a stationary spring portion 3, which includes an inlet stationary spring 31 and an outlet stationary spring 32, and a stationary contact 33 is riveted to the inlet stationary spring 31 and the outlet stationary spring 32 respectively; the base 2 has a mounting hole 4 located between the two stationary contacts 33, and the arc-extinguishing electromagnetic relay... The arc-extinguishing magnet assembly 1 includes a mounting base plate 11, a mounting slot 12, a fastener 13, and an arc-extinguishing magnet 14. The mounting base plate 11 is provided with the mounting slot 12, and the arc-extinguishing magnet 14 is clamped in the mounting slot 12. The fasteners 13 are provided on both sides of the arc-extinguishing magnet 14. The snap-action electromagnetic relay is also provided with a protective shell 53. The opening of the protective shell 53 faces downward and corresponds to the position of the mounting hole 4. The arc-extinguishing magnet assembly 1 passes through the mounting hole 4 and is fastened to the protective shell 53 by the fasteners 13.

[0057] The snap-action electromagnetic relay installed on the base 2 completes the basic on / off function of the relay. The added arc-extinguishing magnet assembly 1 sets the arc-extinguishing magnet 14 between the two stationary contacts 33. The magnetic blow increases the conduction path between the arcs, thereby effectively extinguishing the arc. The arc-extinguishing magnet assembly 1 is detachably connected to the base 2, which is convenient for the user to replace the arc-extinguishing magnet 14 regularly to achieve continuous arc extinguishing. The provided mounting hole 4 allows the user to insert and remove the arc-extinguishing magnet assembly 1 from the bottom. The mounting base plate 11 is adapted to the mounting hole 4 to ensure the integrity of the entire base 2 after installation and to avoid leakage. The mounting slot 12 provided on the mounting base plate 11 is used to fix the position of the arc-extinguishing magnet 14. The buckles 13 set on both sides of the arc-extinguishing magnet 14 are fastened to the protective shell 53, thereby fixing the overall position of the arc-extinguishing magnet assembly 1.

[0058] The snap-action electromagnetic relay also includes a magnetic circuit part 5, which includes a coil frame 51, an iron core and a yoke 52. The coil frame 51 is disposed on the base 2, and the iron core is disposed between the coil frames 51. The yoke 52 is disposed on the coil frame 51 and located above the iron core. The protective shell 53 extends from the side of the coil frame 51 corresponding to the stationary spring part 3 and is located between the two stationary contacts 33. The coil frame 51, iron core, and yoke 52 constitute the magnetic circuit part 5 of the electromagnetic relay. By passing a small current through the coil, the electromagnet generates a magnetic field. The armature is attracted or released by the generation or disappearance of the magnetic field. For details on the working principle and specific structure of the magnetic circuit part 5, please refer to the background technical documents and existing technology. It will not be elaborated here. The protective shell 53 set on the coil frame 51 is sleeved around the arc-extinguishing magnet 14, which protects the arc-extinguishing magnet 14 and prevents it from gradually demagnetizing in the energized and high-temperature environment. At the same time, the protective shell 53 fixes the arc-extinguishing magnet assembly 1, so that it can be locked between the two stationary contacts 33.

[0059] The snap-action electromagnetic relay also includes a moving spring portion 6, which includes a moving spring plate 61. The moving spring plate 61 has a fork-shaped structure, and moving contacts 62 are riveted to both ends of the fork-shaped moving spring plate 61. The moving contacts 62 correspond one-to-one with the stationary contacts 33. The moving spring plate 61 and its moving contacts 62 are used to cooperate with the stationary contacts 33 to realize the conduction and disconnection of the electromagnetic relay. The moving spring portion 6 is prior art and can be referred to in the background art documents. It is described here only to maintain the integrity of the technical solution of this application and to avoid missing necessary technical features.

[0060] The moving spring portion 6 is mounted on the support surface of the yoke 52 and forms a snap-fit ​​linkage mechanism with the magnetic circuit portion 5. This part is also a technical solution well known to those skilled in the art, and specific details can be found in the background art documents and prior art. The description here is only to maintain the integrity of the technical solution of this application and to avoid missing necessary technical features.

[0061] Reference Figure 3 , Figure 3 This is a schematic diagram of the overall structure of the arc-extinguishing magnet assembly in some embodiments of this utility model.

[0062] According to some embodiments of this utility model, optionally, the size of the mounting base plate 11 is adapted to the size of the mounting hole 4. The mounting slot 12 provided on the mounting base plate 11 is rectangular and has movable slots 15 on both sides. The arc-extinguishing magnet 14 and the mounting slot 12 are interference-fitted. The mounting base plate 11 is adapted to the mounting hole 4 to ensure the integrity of the entire base 2 after installation and to avoid leakage. The rectangular mounting slot 12 is adapted to the shape of the arc-extinguishing magnet 14 and plays a fixing role for it. The movable slots 15 provided on both sides of the mounting slot 12 are reserved space for the movable plate 131 to move up and down, which facilitates the subsequent installation and disassembly process.

[0063] The latching component 13 includes a movable plate 131 and a telescopic spring 132. The movable plate 131 is located on both sides of the arc-extinguishing magnet 14. The telescopic spring 132 is provided on the upper side of the movable plate 131. The movable plate 131 is connected to the upper mounting slot 12 through the telescopic spring 132. The movable plate 131 moves up and down within the movable slot 15. One end of the telescopic spring 132 is connected to the upper mounting slot 12, and the other end is connected to the movable plate 131. When downward pressure is applied, the movable plate 131 moves downward. After the pressure is released, the movable plate 131 returns to its original position under the action of the telescopic spring 132.

[0064] The mounting base plate 11 has a disassembly groove 111 on its outer side. Vertical guide grooves 112 are formed on both sides of the disassembly groove 111, corresponding in size to the movable groove 15. The movable plate 131 passes through the guide groove 112 and extends into the disassembly groove 111. A limiting protrusion 133 is provided at one end of the movable plate 131, and a connecting plate 134 is provided at the other end. The connecting plate 134 connects the two movable plates 131 and is located within the disassembly groove 111. The inwardly recessed disassembly groove 111 facilitates the user's disassembly of the arc-extinguishing magnet assembly 1. The movable plates 131 on both sides of the arc-extinguishing magnet 14 pass through the guide groove 112 and are connected together by the connecting plate 134 to operate in tandem. The user can control the movement of the limiting protrusion 133 at the other end by pressing the connecting plate 134 on the back of the base 2. The limiting protrusion 133 is used to adapt to the elastic fixing member 54 inside the protective shell 53.

[0065] Reference Figure 4 , Figure 4 This is a cross-sectional schematic diagram of the arc-extinguishing magnet assembly and protective shell in some embodiments of this utility model.

[0066] According to some embodiments of the present invention, optionally, the protective shell 53 is provided with elastic fasteners 54 extending inward on both sides. The elastic fasteners 54 include elastic buckle plates 541 and return springs 542. The elastic buckle plates 541 include an integrally connected inclined surface and a buckle surface. The buckle surface is provided with a strip-shaped fixing groove 543 on the side corresponding to the arc-extinguishing magnet 14. The return spring 542 is provided on the other side of the buckle surface. The return spring 542 connects the buckle surface and the side wall of the protective shell 53. The elastic buckle plate 541 is elastic. When the movable plate 131 is inserted into and abuts against the buckle surface, the inclined surface bends, and the movable plate 131 slides into the gap between the elastic buckle plate 541 and the arc-extinguishing magnet 14. At the same time, the limiting protrusion 133 at the end of the movable plate 131 is engaged in the strip-shaped fixing groove 543, thus fixing the entire arc-extinguishing magnet assembly 1. When it is necessary to disassemble the arc-extinguishing magnet assembly 1, the connecting plate 134 is pressed down on the mounting base plate 11, and the movable plates 131 on both sides are driven downward. The limiting protrusion 133 disengages from the strip-shaped fixing groove 543, and the elastic buckle plate 541 is reset under the action of the return spring 542.

[0067] When the telescopic spring 132 is in a compressed state, the connecting plate 134 abuts against the top of the disassembly groove 111, the movable plate 131 is located inside the elastic fixing member 54, and the limiting protrusion 133 is engaged in the strip-shaped fixing groove 543. When the telescopic spring 132 is in a stretched state, the connecting plate 134 abuts against the bottom of the disassembly groove 111, the movable plate 131 is located below the elastic fixing member 54, and the limiting protrusion 133 disengages from the strip-shaped fixing groove 543.

[0068] Auxiliary fixing plates 16 are also provided on the upper and lower sides of the mounting slot 12, and the auxiliary fixing plates 16 are in contact with the arc-extinguishing magnet 14. The auxiliary fixing plates 16 provided on the upper and lower sides of the arc-extinguishing magnet 14 are used to increase the tightness of the connection between the arc-extinguishing magnet 14 and the mounting base plate 11, and to prevent the arc-extinguishing magnet 14 from falling off the mounting base plate 11 when the arc-extinguishing magnet assembly 1 is removed.

[0069] It should be understood that the embodiments disclosed herein are not limited to the specific processing steps or materials disclosed herein, but should be extended to equivalent substitutions of such features as understood by those skilled in the art. It should also be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting.

[0070] The term "embodiment" in this specification refers to a specific feature or characteristic described in connection with an embodiment that is included in at least one embodiment of the present invention. Therefore, phrases or "embodiments" appearing in various places throughout the specification do not necessarily refer to the same embodiment.

[0071] Furthermore, the described features or characteristics may be incorporated into one or more embodiments in any other suitable manner. In the above description, specific details, such as thickness, quantity, etc., are provided to provide a comprehensive understanding of embodiments of the present invention. However, those skilled in the art will understand that the present invention can be implemented without the aforementioned one or more specific details or may be implemented using other methods, components, materials, etc.

Claims

1. An arc-extinguishing electromagnetic relay, characterized in that, It includes a base with a detachable arc-extinguishing magnet assembly and a snap-action electromagnetic relay mounted on the base; The snap-action electromagnetic relay includes a stationary spring portion, which includes an inlet stationary spring and an outlet stationary spring, and a stationary contact is riveted to the inlet stationary spring and the outlet stationary spring respectively; The base has a mounting hole located between the two stationary contacts. The arc-extinguishing magnet assembly includes a mounting base plate, a mounting slot, a fastener, and an arc-extinguishing magnet. The mounting base plate has the mounting slot, in which the arc-extinguishing magnet is secured. The fasteners are located on both sides of the arc-extinguishing magnet. The snap-action electromagnetic relay also has a protective shell with its opening facing downwards and corresponding to the mounting hole. After passing through the mounting hole, the arc-extinguishing magnet assembly is fastened to the protective shell by the fasteners.

2. The arc-extinguishing electromagnetic relay according to claim 1, characterized in that, The snap-action electromagnetic relay also includes a magnetic circuit section, which includes a coil frame, an iron core, and a yoke. The coil frame is disposed on the base, and the iron core is disposed between the coil frames. The yoke is disposed on the coil frame and located above the iron core. A protective shell extends from the side of the coil frame corresponding to the stationary spring section, and the protective shell is located between the two stationary contacts.

3. The arc-extinguishing electromagnetic relay according to claim 2, characterized in that, The snap-action electromagnetic relay also includes a moving spring part, which includes a moving spring plate. The moving spring plate has a fork-shaped structure, and moving contacts are riveted to both ends of the fork-shaped moving spring plate. The moving contacts and the stationary contacts correspond one-to-one.

4. The arc-extinguishing electromagnetic relay according to claim 3, characterized in that, The moving spring is mounted on the support surface of the yoke and forms a snap-action linkage mechanism with the magnetic circuit.

5. The arc-extinguishing electromagnetic relay according to claim 2, characterized in that, The size of the mounting base plate is adapted to the size of the mounting hole. The mounting slot on the mounting base plate is rectangular and has movable slots on both sides. The arc-extinguishing magnet and the mounting slot are interference-fitted.

6. The arc-extinguishing electromagnetic relay according to claim 5, characterized in that, The fastener includes a movable plate and a telescopic spring. The movable plate is located on both sides of the arc-extinguishing magnet. The telescopic spring is provided on the upper side of the movable plate. The movable plate is connected to the mounting slot on the upper side through the telescopic spring. The movable plate moves up and down within the movable slot.

7. The arc-extinguishing electromagnetic relay according to claim 6, characterized in that, The mounting base plate has a disassembly groove on its outer side, and guide grooves are vertically provided on both sides of the disassembly groove. The guide grooves correspond to the size of the movable groove. The movable plate passes through the guide groove and extends into the disassembly groove. A limiting protrusion is provided at one end of the movable plate, and a connecting plate is provided at the other end of the movable plate. The connecting plate connects the two movable plates and is located in the disassembly groove.

8. The arc-extinguishing electromagnetic relay according to claim 7, characterized in that, The protective shell has elastic fasteners extending inward on both sides. Each elastic fastener includes an elastic snap plate and a return spring. The elastic snap plate has an integrally connected inclined surface and a snap surface. The snap surface has a strip-shaped fixing groove on the side corresponding to the arc-extinguishing magnet. The return spring is provided on the other side of the snap surface. The return spring connects the snap surface and the side wall of the protective shell.

9. The arc-extinguishing electromagnetic relay according to claim 8, characterized in that, When the telescopic spring is in a compressed state, the connecting plate abuts against the top of the disassembly groove, the movable plate is located inside the elastic fixing member, and the limiting protrusion is engaged in the strip fixing groove. When the telescopic spring is in a stretched state, the connecting plate abuts against the bottom of the disassembly groove, the movable plate is located below the elastic fixing member, and the limiting protrusion disengages from the strip fixing groove.

10. The arc-extinguishing electromagnetic relay according to claim 1, characterized in that, The mounting slot is further extended with auxiliary fixing plates on the upper and lower sides, which are in contact with the arc-extinguishing magnet.

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