Electromagnetic relay

Abstract

The utility model discloses an electromagnetic relay, which belongs to the technical field of low-voltage electric appliances and comprises a base, a contact piece assembly, a push plate, a first elastic piece and an electromagnetic assembly, the contact piece assembly and the electromagnetic assembly are both arranged on the base, and the contact piece assembly comprises a normally open static contact and a normally closed static contact which are oppositely arranged. The movable contact spring is arranged between the normally open static contact and the normally closed static contact; the push plate is connected with the movable contact spring; the first elastic piece is arranged between the base and the push plate, the electromagnetic assembly comprises an electromagnetic body, an armature and a second elastic piece, the first end of the armature is connected with the push plate, and the second end of the armature is connected with the second elastic piece. According to the electromagnetic relay provided by the utility model, under the dual action of the first elastic piece and the second elastic piece, the push plate pushes the reed to be separated from the normally-open static contact and to be connected with the normally-closed static contact in an abutting manner, and the first elastic piece and the second elastic piece do not cause elastic attenuation due to current-carrying heating, so that the risk of fusing the movable reed is reduced, and the heating power consumption is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of low-voltage electrical appliances, in particular to an electromagnetic relay. Background Art

[0002] An electromagnetic relay is an electronic control device that has a control system (also known as an input circuit) and a controlled system (also known as an output circuit). It is usually used in automatic control circuits. It is actually an "automatic switch" that uses a smaller current and a lower voltage to control a larger current and a higher voltage.

[0003] In the prior art, the electromagnetic relay includes a normally closed static contact and a normally open static contact. When the power is on, under the action of electromagnetic attraction, the armature pushes the spring piece through a push plate, and the movable spring piece is deformed so that the movable spring piece contacts and conducts with the normally open static contact; after the power is off, the movable spring piece recovers its deformation and contacts and conducts with the normally closed static contact, and the movable spring piece will squeeze the push plate during the process of recovering its deformation to reset the push plate and the armature. Among them, the contact pressure on the normally closed static contact depends only on the deformation of the movable spring piece. As an elastic conductive material, the shape of the movable spring piece is difficult to control, and the feedback to the product is the instability and uncertainty of the pressure of the normally closed static contact, and manual intervention is not only difficult to achieve but also more costly. In addition, the movable spring piece is not only an elastic part but also a current-carrying part in the product. It generates a lot of heat when carrying current, and the elastic attenuation after heating will reduce the pressure of the normally closed contact. The reduction of contact pressure will lead to an increase in heat. Under the vicious cycle, there is a greater risk of causing the movable spring piece to fuse, resulting in safety hazards. In addition, the electromagnetic attraction, that is, the initial reaction force, depends on the normally closed static contact pressure. The normally closed static contact pressure is linearly proportional to the initial reaction force. In order to ensure the reliability of the normally closed static contact pressure, a large margin is usually required for the normally closed static contact pressure, that is, the normally closed static contact pressure is increased, that is, the electromagnetic power needs to be increased to improve the electromagnetic attraction, which will lead to an increase in the heat and power consumption of the product. Utility Model Content

[0004] The utility model aims to provide an electromagnetic relay, which can effectively ensure that the pressure of the moving spring on the normally closed static contact is stable and reliable, reduce the risk of the moving spring fusing, and reduce the electromagnetic power.

[0005] To achieve this purpose, the utility model adopts the following technical solutions:

[0006] An electromagnetic relay is provided, comprising:

[0007] Pedestal;

[0008] A contact assembly is arranged on the base, the contact assembly comprises a normally open static contact and a normally closed static contact which are arranged opposite to each other, and a movable spring arranged between the normally open static contact and the normally closed static contact;

[0009] A push plate is connected to the movable spring, and the push plate has a first state position and a second state position; wherein,

[0010] In the first state, the movable spring piece abuts against the normally open static contact;

[0011] In the second state, the movable spring is in contact with the normally closed static contact; and

[0012] A first elastic member is disposed between the base and the push plate;

[0013] The electromagnetic assembly is arranged on the base, and the electromagnetic assembly includes an electromagnetic body, an armature and a second elastic member, wherein the first end of the armature is connected to the push plate, and the second end of the armature is connected to the second elastic member, and the electromagnetic assembly has a power-off state and a power-on state; wherein,

[0014] The first elastic member and the second elastic member both make the push plate always have a tendency to switch from the first state position to the second state position and make the armature always have a tendency to stay away from the electromagnetic body;

[0015] In the power-off state, the armature is separated from the electromagnetic body, and the push plate is kept in the second state position;

[0016] In the power-on state, the electromagnetic body is attracted to the armature, and the push plate is maintained in the first state position.

[0017] Optionally, the base is provided with a first protrusion, a second protrusion and a third protrusion arranged in a triangle shape;

[0018] The first elastic member includes a first side portion and a second side portion which are arranged at an angle, the first side portion is arranged between the first protrusion and the second protrusion, the second side portion is arranged between the second protrusion and the third protrusion, and the first side portion is connected to the push plate.

[0019] Optionally, a stopper is provided on one side of the push plate facing the first elastic member, and the stopper abuts against a side surface of the first edge portion; and / or

[0020] The push plate is provided with a connecting hole, and the first edge portion is inserted into the connecting hole.

[0021] Optionally, a receiving groove is provided on the base, the first protrusion and the third protrusion are provided on the side walls of the receiving groove, the first elastic member is provided in the receiving groove, and the first edge portion extends out of the receiving groove and is connected to the push plate.

[0022] Optionally, the second elastic member includes a first folded edge and a second folded edge arranged at an angle, a slot is formed between the first folded edge and the electromagnetic body, the second folded edge is connected to the electromagnetic body, the second end of the armature is inserted into the slot, and a first limiting groove is provided on the side of the armature facing the first folded edge, a third folded edge is provided on the first folded edge, the third folded edge is extended toward the second folded edge, and the end of the third folded edge is provided in the first limiting groove.

[0023] Optionally, a fourth folded edge is provided on the second folded edge, the fourth folded edge extends toward the first folded edge, the fourth folded edge is abutted against the second end of the armature, and the end of the fourth folded edge is bent toward the armature to form a limited edge, and the limited edge is abutted against the side of the armature facing the first folded edge.

[0024] Optionally, a second limiting groove is provided on a side of the second end of the armature facing the first folded edge, and the limiting edge is provided in the second limiting groove.

[0025] Optionally, a moving contact is provided on the moving reed, and a semi-annular groove surrounding the moving contact is provided on the moving reed.

[0026] Optionally, a coil spring is provided on the push plate, the coil spring can abut against the movable spring leaf, and the coil spring is configured to provide a force for the movable spring leaf to press the normally open static contact.

[0027] Optionally, it also includes a shell and a switch component arranged outside the shell, the base, the contact assembly, the push plate, the first elastic component and the electromagnetic assembly are arranged in the shell, the switch component is connected to the push plate, and the switch component is used to push the push plate to slide between the first state position and the second state position.

[0028] Beneficial effect: The electromagnetic relay provided by the utility model switches from the power-off state to the power-on state. Under the magnetic attraction of the electromagnetic body to the armature, the push plate switches from the first state position to the second state position, and the push plate pushes the spring piece to make the moving spring piece detach from the normally closed static contact and abut against the normally open static contact for conduction. Under the continuous magnetic attraction of the electromagnetic body to the armature, the moving spring piece maintains contact and conduction with the normally open static contact, which is stable and reliable. When switching from the power-on state to the power-off state, under the dual action of the first elastic member and the second elastic member, the armature begins to move away from the electromagnetic body, and the push plate pushes the spring piece to make the moving spring piece detach from the normally open static contact and abut against the normally closed static contact for conduction. The first elastic member and the second elastic member will not cause elastic attenuation due to current-carrying heat, effectively ensuring that the pressure of the moving spring piece on the normally closed static contact is stable and reliable, and reducing the risk of the moving spring piece fusing. In addition, the first elastic member acts directly on the push plate, and the second elastic member acts directly on the armature, which can ensure smooth position conversion of the push plate and smooth movement of the armature away from the electromagnetic body. The normally closed static contact pressure does not need to have a large margin, thereby reducing electromagnetic power and reducing heat and power consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a structural schematic diagram of the electromagnetic relay provided by the utility model in the power-on state;

[0030] Figure 2 It is a structural schematic diagram of the electromagnetic relay provided by the utility model in a power-off state;

[0031] Figure 3 This is a structural schematic diagram of a base provided by the utility model from one perspective;

[0032] Figure 4 It is a structural schematic diagram of an implementation mode of the movable spring provided by the utility model;

[0033] Figure 5 It is a structural schematic diagram of an implementation mode of the push plate provided by the utility model;

[0034] Figure 6 It is a structural schematic diagram of another embodiment of the push plate provided by the utility model;

[0035] Figure 7 This is a structural schematic diagram of another embodiment of the movable spring provided by the utility model from one viewing angle;

[0036] Figure 8 This is a structural schematic diagram from another perspective of another embodiment of the movable spring provided by the utility model;

[0037] Fig. 9 It is a structural schematic diagram of an electromagnetic relay with a second elastic member provided by the utility model;

[0038] Fig.10 It is a partial cross-sectional view of the electromagnetic assembly provided by the utility model;

[0039] Fig.11 It is a schematic diagram of the matching structure of the electromagnetic assembly and the second elastic member provided by the utility model;

[0040] Fig.12 It is a structural schematic diagram of the second elastic member provided by the utility model;

[0041] Fig.13 It is a structural schematic diagram of the armature provided by the utility model;

[0042] Fig.14 It is a structural schematic diagram of the bracket provided by the utility model;

[0043] Fig.15 It is a structural schematic diagram of the magnetic yoke provided by the utility model;

[0044] Fig.16 This is a structural schematic diagram of the base provided by the utility model from another viewing angle;

[0045] Fig.17 It is a schematic diagram of the structure of the plug pin provided by the utility model;

[0046] Fig.18 It is a cross-sectional view of the electromagnetic relay provided by the utility model;

[0047] Fig.19 This is a structural schematic diagram of a top cover provided by the utility model from one perspective;

[0048] Fig. 20 This is a structural schematic diagram of an implementation mode of the housing provided by the utility model;

[0049] Fig.21 It is an exploded diagram of the electromagnetic relay provided by the utility model;

[0050] Fig. 22 It is a structural schematic diagram of the switch element provided by the utility model;

[0051] Fig.23 This is a schematic structural diagram of another viewing angle of the top cover provided by the utility model;

[0052] Fig.24 It is a structural schematic diagram of the lighting assembly provided by the utility model;

[0053] Fig.25 It is a schematic diagram of light refraction of the lighting assembly provided by the utility model through a light guide column;

[0054] Fig.26 It is a schematic diagram of the light path of the light guide column provided by the utility model;

[0055] Fig. 27 This is a structural schematic diagram of an implementation mode of the light guide column provided by the utility model;

[0056] Fig.28 It is a structural schematic diagram of another embodiment of the light guide column provided by the utility model;

[0057] Fig.29 This is a structural schematic diagram of another embodiment of the light guide column provided by the utility model;

[0058] Fig.30 It is a structural schematic diagram of another embodiment of the housing provided by the utility model.

[0059] In the figure:

[0060] 100, base; 110, receiving groove; 111, first protrusion; 112, second protrusion; 113, third protrusion; 120, limiting channel; 130, buckle groove; 140, positioning groove; 150, installation groove; 151, positioning column;

[0061] 200, contact piece assembly; 210, normally open static contact; 220, normally closed static contact; 230, moving spring; 231, moving contact; 232, semi-annular groove; 233, first bayonet; 234, connecting plate; 2341, retaining edge; 240, terminal block;

[0062] 300, push plate; 310, stopper; 320, shift fork; 321, second bayonet; 322, connecting column; 330, connecting block; 331, connecting groove; 340, hook; 350, slide groove; 360, warning sign; 370, push block;

[0063] 400, first elastic member; 410, first side portion; 420, second side portion;

[0064] 500, electromagnetic assembly; 510, electromagnetic body; 511, bracket; 5111, center hole; 5112, positioning block; 5113, shoulder; 5114, blind insertion hole; 512, coil; 513, iron core; 5131, stopper; 514, yoke; 5141, perforation; 5142, riveted protrusion; 5143, limiting column; 520, armature; 521, first limiting groove; 522, second limiting groove; 523, third bayonet; 524, contour chamfer; 530, pin; 531, lead-out portion; 532, connecting portion; 533, inserting portion; 534, welding portion;

[0065] 600, spiral spring;

[0066] 700, second elastic member; 701, slot; 710, first folded edge; 720, second folded edge; 721, connecting edge; 7211, riveting hole; 722, yielding edge; 730, third folded edge; 740, fourth folded edge; 741, limiting edge; 750, through slot;

[0067] 810, housing; 811, first protrusion; 812, positioning rib; 813, first glue groove; 814, second glue groove; 815, first fixing groove; 816, long groove; 8161, clearance groove; 820, top cover; 821, limiting protrusion; 822, first buckle; 823, second buckle; 824, third buckle; 825, convex lens; 826, sliding hole; 8261, sinking groove; 8262, installation channel; 827, card strip; 828, transparent indication window; 829, second fixing groove; 830, switch member; 831, operating part; 832, middle part; 833, execution part; 834, first card slot; 835, second card slot; 836, side panel;

[0068] 910, lighting assembly; 911, light emitting diode; 912, PCB board; 9121, plug-in channel; 9122, positioning hole; 913, resistor; 920, light guide column; 9211, first chamfer; 9212, first concave arc surface; 922, second chamfer; 9231, mounting platform; 9232, focusing groove; 9233, third chamfer; 9234, second concave arc surface. DETAILED DESCRIPTION

[0069] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0070] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0071] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0072] In the description of this embodiment, the terms "upper", "lower", "right", etc., are based on the directions or positions shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0073] Reference Figure 1 and Figure 2 As shown, this embodiment provides an electromagnetic relay, which includes a base 100 , a contact assembly 200 , a push plate 300 , a first elastic member 400 and an electromagnetic assembly 500 .

[0074] Specifically, the contact assembly 200 is disposed on the base 100 , and the contact assembly 200 includes a normally open static contact 210 and a normally closed static contact 220 that are relatively disposed, and a movable reed 230 disposed between the normally open static contact 210 and the normally closed static contact 220 .

[0075] Specifically, the push plate 300 is connected to the movable spring 230, and the push plate 300 has a first state position and a second state position. In the first state position, the movable spring 230 abuts against the normally open static contact 210; in the second state position, the movable spring 230 abuts against the normally closed static contact 220.

[0076] Specifically, the first elastic member 400 is disposed between the base 100 and the push plate 300 .

[0077] Specifically, the electromagnetic assembly 500 is arranged on the base 100, and the electromagnetic assembly 500 includes an electromagnetic body 510, an armature 520 and a second elastic member 700. The first end of the armature 520 is connected to the push plate 300, and the second end of the armature 520 is connected to the second elastic member 700. The electromagnetic assembly 500 has a power-off state and a power-on state.

[0078] The first elastic member 400 and the second elastic member 700 both make the push plate 300 always have a tendency to switch from the first state position to the second state position and make the armature 520 always have a tendency to stay away from the electromagnetic body 510 .

[0079] In the power-off state, the armature 520 is separated from the electromagnetic body 510 , and the push plate 300 is kept in the second state position.

[0080] In the power-on state, the electromagnetic body 510 and the armature 520 are attracted, and the push plate 300 is kept in the first state position.

[0081] In this embodiment, the electromagnetic assembly 500 switches from the power-off state to the power-on state. Under the magnetic attraction of the electromagnetic body 510 on the armature 520, the push plate 300 switches from the first state to the second state. The push plate 300 pushes the spring piece 230 to make the movable spring piece 230 separate from the normally closed static contact 220 and abut against the normally open static contact 210 for conduction. Under the continuous magnetic attraction of the electromagnetic body 510 on the armature 520, the movable spring piece 230 maintains contact and conduction with the normally open static contact 210, which is stable and reliable. The electromagnetic assembly 500 switches from the power-on state to the power-off state. Under the dual action of the first elastic member 400 and the second elastic member 700, the armature 520 begins to move away from the electromagnetic body 510, and the push plate 300 pushes the spring 230, so that the movable spring 230 is separated from the normally open static contact 210 and abuts against the normally closed static contact 220 for conduction. The first elastic member 400 and the second elastic member 700 will not cause elastic attenuation due to current-carrying heat, effectively ensuring that the pressure of the movable spring 230 on the normally closed static contact 220 is stable and reliable, reducing the risk of the movable spring 230 fusing. In addition, the first elastic member 400 directly acts on the push plate 300, and the second elastic member 700 directly acts on the armature 520, which can ensure that the position conversion of the push plate 300 and the movement of the armature 520 away from the electromagnetic body 510 are smooth, and the pressure of the movable spring 230 on the normally closed static contact 220 does not need to leave a large margin, thereby reducing the electromagnetic power and the heat power consumption.

[0082] It is understandable that when the electromagnetic assembly 500 is in the power-off state, the second elastic member 700 acts on the second end of the armature 520, so that the armature 520 pushes the push plate 300 and cooperates with the first elastic member 400 to force the movable spring 230 to keep squeezing the normally closed static contact 220.

[0083] Exemplarily, the pressure exerted by the first elastic member 400 on the normally closed static contact 220 through the push plate 300 can be greater than the pressure exerted by the movable spring 230 on the normally closed static contact 220 due to its own elasticity, which can further reduce the margin of pressure exerted by the movable spring 230 on the normally closed static contact 220.

[0084] Exemplarily, the normally open static contact 210 , the normally closed static contact 220 , and the movable spring 230 are respectively connected to a terminal block 240 to be connected to an external device.

[0085] Exemplarily, the push plate 300 may be slidably connected to the base 100 and / or the electromagnetic body 510. Of course, the push plate 300 may also be connected to the base 100 and the electromagnetic body 510 in other ways, such as a rotational connection, which is not limited in the present application.

[0086] In this embodiment, refer to Figures 1 to 3 As shown, the base 100 is provided with a first protrusion 111, a second protrusion 112 and a third protrusion 113 arranged in a triangular shape, and the first elastic member 400 includes a first side portion 410 and a second side portion 420 arranged at an angle, the first side portion 410 is arranged between the first protrusion 111 and the second protrusion 112, the second side portion 420 is arranged between the second protrusion 112 and the third protrusion 113, and the first side portion 410 is connected to the push plate 300. In this embodiment, the first elastic member 400 is fixed by the first protrusion 111, the second protrusion 112 and the third protrusion 113 arranged in a triangular shape, which is stable and reliable, and convenient for disassembly and assembly.

[0087] Exemplarily, the first elastic member 400 may be provided in a sheet shape and formed by bending.

[0088] Exemplarily, the base 100 is provided with a receiving groove 110, the first protrusion 111 and the third protrusion 113 are provided on the side wall of the receiving groove 110, the first elastic member 400 is provided in the receiving groove 110, and the first edge portion 410 extends outside the receiving groove 110 and is connected to the push plate 300. In this embodiment, the first protrusion 111 and the third protrusion 113 are provided on the side wall of the receiving groove 110, which can improve stability and reduce the risk of fracture of the first protrusion 111 and the third protrusion 113. In addition, by providing the receiving groove 110, it is more convenient to install the first elastic member 400, and the risk of the first elastic member 400 flying off during the installation process is effectively reduced.

[0089] In some embodiments, a stopper 310 is provided on one side of the push plate 300 facing the first elastic member 400, and the stopper 310 abuts against the side surface of the first side portion 410. In the power-off state, the first side portion 410 presses the stopper 310, so that the push plate 300 presses the movable spring piece 230 toward the normally closed static contact 220, so that the pressure of the movable spring piece 230 on the normally closed static contact 220 is stable and reliable.

[0090] In some embodiments, a connecting hole (not shown) is provided on the push plate 300, and the first edge 410 is inserted into the connecting hole. The first edge 410 is limited by the connecting hole. It can be understood that in the power-off state, the first edge 410 squeezes the side wall of the connecting hole so that the push plate 300 squeezes the movable reed 230 toward the normally closed static contact 220, so that the pressure of the movable reed 230 on the normally closed static contact 220 is stable and reliable.

[0091] In some embodiments, the push plate 300 is provided with both a stopper 310 and a connection hole on one side facing the first elastic member 400. For example, the groove wall of the connection hole can be extended to form the stopper 310, increasing the contact area with the first side portion 410 to ensure that the connection between the first side portion 410 and the push plate 300 is stable and reliable. Of course, the push plate 300 and the first side portion 410 can also be connected in other ways, which are not limited in this application.

[0092] In this embodiment, refer to Figure 3 and Figure 4 As shown, a moving contact 231 is disposed on the moving reed 230 , and a semi-annular groove 232 surrounding the moving contact 231 is disposed on the moving reed 230 , so that the moving reed 230 has a good deflection and the extrusion force between the moving contact 231 and the normally open static contact 210 is large enough.

[0093] Specifically, the semi-annular groove 232 can be ohmic in shape so that the movable reed 230 has a symmetrical structure, and the thrust center of the movable reed 230 coincides with the center of the movable contact 231, thereby reducing the energy loss caused by the torsion of the movable reed 230, and the movable contact 231 can also achieve the purpose of center alignment.

[0094] In this embodiment, refer to Figures 4 to 8 As shown, a first end of the movable spring piece 230 is fixed on the base 100 , and a second end of the movable spring piece 230 is connected to the push plate 300 .

[0095] In some embodiments, Figure 4 and Figure 5 As shown, the second end of the moving spring 230 is provided with an I-shaped bayonet, and the push plate 300 is provided with a shift fork 320 that matches the I-shaped bayonet. It can be understood that the I-shaped bayonet includes a first bayonet 233 respectively provided on the edges of both sides of the moving spring 230, and the two rods of the shift fork 320 are provided with a second bayonet 321, and the first bayonet 233 is engaged with the second bayonet 321 on the corresponding side to form a limit, so as to ensure the stability of the connection between the moving spring 230 and the push plate 300. In this embodiment, the push plate 300 pushes the moving spring 230 through the inner wall of the second bayonet 321, so that the moving contact 231 abuts against the normally open static contact 210 or the normally closed static contact 220.

[0096] In some embodiments, Figures 6 to 8As shown, a connection block 330 is provided on the push plate 300, and connection grooves 331 are respectively provided on the two side edges of the connection block 330. Two spaced connection plates 234 are extended from the second end of the movable spring piece 230. The connection plates 234 are bent to form a retaining edge 2341 after passing through the connection grooves 331 on the corresponding sides to form a limit, so as to ensure the stability of the connection between the movable spring piece 230 and the push plate 300. In this embodiment, the push plate 300 pushes the push spring piece 230 through the inner wall of the connection groove 331, so that the movable contact 231 abuts against the normally open static contact 210 or the normally closed static contact 220.

[0097] In some embodiments, the movable spring piece 230 provided with the connecting plate 234 may also be connected to the push plate 300 provided with the shift fork 320. Specifically, the connecting plate 234 is inserted into the corresponding second bayonet 321.

[0098] In this embodiment, refer to Fig. 9 As shown, the push plate 300 may be provided with a coil spring 600, which can abut against the movable spring 230, and the coil spring 600 is configured to provide a force for the movable spring 230 to press the normally open static contact 210. In this embodiment, the push plate 300 can abut against the movable spring 230 through the coil spring 600, so that the movable spring 230 has a greater pressure on the normally open static contact 210, and the pressure is stable and reliable.

[0099] For example, Figure 5 and Fig. 9 As shown, a connecting post 322 is disposed in the shift fork 320 , and the coil spring 600 can be sleeved on the connecting post 322 .

[0100] For example, Figure 6 and Fig. 9 As shown, the coil spring 600 can be sleeved on the connecting block 330 .

[0101] In this embodiment, refer to Figure 1 , Figure 2 , Figures 9 to 13 As shown, the second elastic member 700 may be in a sheet shape and formed by bending.

[0102] Specifically, the second elastic member 700 includes a first folded edge 710 and a second folded edge 720 arranged at an angle, a slot 701 is formed between the first folded edge 710 and the electromagnetic body 510, the second folded edge 720 is connected to the electromagnetic body 510, the second end of the armature 520 is inserted into the slot 701, and the armature 520 is provided with a first limiting groove 521 on the side facing the first folded edge 710, and a third folded edge 730 is provided on the first folded edge 710, the third folded edge 730 is extended toward the second folded edge 720, and the end of the third folded edge 730 is arranged in the first limiting groove 521, so that the connection between the second end of the armature 520 and the second elastic member 700 is stable and reliable, effectively preventing the armature 520 from making actions other than pushing the push plate 300, and ensuring the action accuracy of the armature 520. Among them, the third folded edge 730 is bent toward the end of the second folded edge 720. In addition, when the electromagnetic assembly 500 switches from the power-on state to the power-off state, the second elastic member 700 undergoes elastic deformation, and the third fold edge 730 squeezes the armature 520 toward one side of the first fold edge 710, thereby forcing the armature 520 to move and cooperate with the first elastic member 400 to switch the push plate 300 from the first state position to the second state position.

[0103] Specifically, the second folding edge 720 is provided with a fourth folding edge 740, the fourth folding edge 740 is extended toward the first folding edge 710, the fourth folding edge 740 is abutted against the second end of the armature 520, and the end of the fourth folding edge 740 is bent toward the armature 520 to form a limited edge 741, and the limited edge 741 is abutted against the side of the armature 520 facing the first folding edge 710. Among them, the fourth folding edge 740 is bent toward the end of the first folding edge 710. Among them, the switching of the on and off state of the electromagnetic assembly 500 can cause the second elastic member 700 to produce elastic deformation. When the electromagnetic assembly 500 is switched from the power-on state to the power-off state, the elastic deformation of the second elastic member 700 can cause the limited edge 741 and the third folding edge 730 to squeeze the armature 520 toward the side of the first folding edge 710, and cooperate with the first elastic member 400 to better convert the push plate 300 from the first state position to the second state position.

[0104] Specifically, a second limit groove 522 is provided on the side of the second end of the armature 520 facing the first folding edge 710, and the limit edge 741 is provided in the second limit groove 522, so that the length of the fourth folding edge 740 can be shortened to ensure that the extrusion force of the limit edge 741 on the groove wall of the second limit groove 522 is large enough, and the push plate 300 can be more stably and reliably converted from the first state position to the second state position in cooperation with the first elastic member 400. Exemplarily, the second limit groove 522 can be right-angled.

[0105] In a feasible implementation, a through slot 750 is provided on the second elastic member 700 , and the through slot 750 extends to the first folded edge 710 and the second folded edge 720 , wherein the third folded edge 730 and the fourth folded edge 740 are both formed by extending the side walls of the through slot 750 .

[0106] In this embodiment, refer to Figure 5 , Figure 6 and Fig.13 As shown, the first end of the armature 520 is an I-shaped structure, that is, third snap-in slots 523 are respectively provided on the two side edges of the armature 520, and a hook 340 corresponding to the third snap-in slot 523 is provided on the push plate 300. The hook 340 and the third snap-in slot 523 are engaged and limited to realize the armature 520 and the push plate 300.

[0107] Exemplarily, a contoured chamfer 524 is provided at a position of the armature 520 close to the hook 340 , and the contoured chamfer 524 is located on a side of the armature 520 facing away from the electromagnetic body 510 .

[0108] In this embodiment, refer to Fig.10 , Figures 14 to 16 As shown, the electromagnetic body 510 includes a bracket 511, a coil 512, an iron core 513 and a yoke 514. The coil 512 is wound on the bracket 511. The bracket 511 is provided with a center hole 5111. The center hole 5111 passes through the first end and the second end of the bracket 511. The first end of the iron core 513 is provided with a stopper 5131. The second end of the iron core 513 is passed through the center hole 5111 at the first end of the bracket 511 and is connected to the yoke 514 at the second end of the bracket 511, and the stopper 5131 abuts against the corresponding end of the center hole 5111.

[0109] Exemplarily, a positioning block 5112 is provided on the bracket 511, and a slide groove 350 is provided on the push plate 300. The positioning block 5112 is slidably arranged in the slide groove 350 to realize a sliding connection between the electromagnetic body 510 and the push plate 300, thereby realizing the switching of the push plate 300 between the first state position and the second state position.

[0110] Illustratively, a groove for accommodating the second elastic member 700 may be provided on the bracket 511 to limit the second elastic member 700 .

[0111] Exemplarily, the yoke 514 may be L-shaped, and the long side of the yoke 514 extends from the second end of the bracket 511 to the first end of the bracket 511, that is, the long side end of the yoke 514 and the stopper 5131 are located at the same end of the bracket 511. More specifically, a through hole 5141 is provided on the short side of the yoke 514, and the second end of the iron core 513 is inserted into the through hole 5141.

[0112] Specifically, a slot 701 is formed between the end of the long side of the yoke 514 and the first folded edge 710 of the second elastic member 700. It can be understood that the armature 520 is located at the first end of the iron core 513. In this embodiment, the armature 520 is against the long side of the yoke 514 on the side facing the iron core 513, and when the electromagnetic assembly 500 is in the power-on state, the stopper 5131 is attracted to the armature 520 under the electromagnetic action of the coil 512.

[0113] In a feasible implementation, the second folded edge 720 is bent to form a connecting edge 721 and a yielding edge 722, the connecting edge 721 is connected to the long side of the yoke 514, and a gap is formed between the yielding edge 722 and the long side of the yoke 514, so that the second end of the armature 520 protrudes from the side of the long side of the yoke 514 facing away from the bracket 511. When the electromagnetic assembly 500 is switched from the power-on state to the power-off state, the limiting edge 741 hooks and pulls the second end of the armature 520, so that the armature 520 can rotate relative to the intersection line of the armature 520 and the yoke 514, which is more suitable for forcing the push plate 300 to switch from the first state position to the second state position.

[0114] Exemplarily, the second folded edge 720 can be fixed to the yoke 514 by riveting, and at least one rivet protrusion 5142, for example, two, is provided on the long side of the yoke 514, and the second folded edge 720 is provided with rivet holes 7211 corresponding to the rivet protrusions 5142. Specifically, the connecting edge 721 is provided with rivet holes 7211.

[0115] Exemplarily, at least one limiting column 5143 is provided on the long side of the yoke 514, and a limiting channel 120 corresponding to the limiting column 5143 is provided on the base 100. The limiting column 5143 is inserted into the corresponding limiting channel 120 to achieve positioning and assembly of the electromagnetic body 510 and the base 100.

[0116] In this embodiment, refer to Fig.14 , Fig.17 and Fig.18 As shown, the two ends of the bracket 511 are respectively provided with shoulders 5113 to limit the coil 512. The positioning block 5112 is arranged on the shoulder 5113 at the first end of the bracket 511.

[0117] Specifically, a plug-in blind hole 5114 is provided on the shoulder 5113 at the first end of the bracket 511, and a plug-in pin 530 is inserted in the plug-in blind hole 5114. In this embodiment, two plug-in blind holes 5114 that are not connected to each other are provided on the bracket 511, and the plug-in pin 530 includes two lead-out parts 531, and a connecting part 532 is provided between the lead-out parts 531. One end of the lead-out part 531 is bent to form an inserting part 533, and a welding part 534 is provided on the inserting part 533. When assembling, the connecting part 532 is cut off, and the inserting parts 533 are inserted into the plug-in blind holes 5114 one by one, and then the two ends of the coil 512 are wound on the welding part 534 one by one and welded. Exemplarily, the welding part 534 can be bent first, and then the two ends of the welded coil 512 are wound, and finally the welding part 534 is restored to its original state.

[0118] Exemplarily, the insertion blind holes 5114 may be respectively arranged on both sides of the shoulder 5113 along the extension direction of the central hole 5111 .

[0119] Of course, the pin 530 may also be injection molded together with the bracket 511, which is not limited in this application.

[0120] In this embodiment, refer to Figures 18 to 20 As shown, the electromagnetic relay also includes a shell and a switch component 830 arranged outside the shell. A base 100, a contact assembly 200, a push plate 300, a first elastic component 400 and an electromagnetic assembly 500 are arranged in the shell. The switch component 830 is connected to the push plate 300. The switch component 830 is used to push the push plate 300 to slide between the first state position and the second state position, thereby realizing the test and detection of the electromagnetic relay.

[0121] Specifically, the housing includes an outer shell 810 and a top cover 820 . The base 100 , the contact assembly 200 , the push plate 300 , the first elastic member 400 and the electromagnetic assembly 500 are all disposed in a cavity of the outer shell 810 . The top cover 820 is used to seal the cavity of the outer shell 810 .

[0122] Exemplarily, a limiting protrusion 821 is provided on one side of the top cover 820 facing the outer shell 810, and the limiting protrusion 821 extends into the cavity of the outer shell 810 and abuts against the inner wall of the cavity of the outer shell 810 to form a limit. Exemplarily, the top cover 820 is in the shape of a rectangular plate, and four limiting protrusions 821 can be provided and respectively located at the four corners of the top cover 820 to ensure the assembly accuracy between the outer shell 810 and the top cover 820.

[0123] For example, the top cover 820 may be snap-fitted with the housing 810. For example, at least one first snap 822 may be provided on the side of the top cover 820 facing the housing 810, and a protrusion or groove corresponding to the first snap 822 may be provided in the housing 810. Fig.19 and 20As shown, a first protrusion 811 which can be engaged with the first buckle 822 is provided in the housing 810 .

[0124] Exemplarily, the top cover 820 may be snap-fitted with the base 100. For example, the top cover 820 may be provided with at least one second snap-fit ​​823, and the base 100 may be provided with a protrusion or groove snap-fitted with the second snap-fit ​​823 in a one-to-one correspondence. Fig.16 and 19 As shown, two second buckles 823 are provided on the top cover 820, and two second protrusions (not shown) corresponding to the second buckles 823 are provided on the base 100, and the second protrusions are provided with buckle grooves 130 that can be engaged with the second buckles 823.

[0125] Exemplarily, the top cover 820 may be snap-fitted with the bracket 511. For example, the top cover 820 may be provided with at least one third snap-fit ​​824, and the bracket 511 may be provided with a protrusion or groove snap-fitted with the third snap-fit ​​824 in a one-to-one correspondence. Fig.14 and Fig.19 As shown, the positioning block 5112 is hook-shaped to engage with the third buckle 824.

[0126] For example, the top cover 820 may be provided with a nameplate, model number, and other markings.

[0127] Exemplarily, a convex lens 825 is provided on the top cover 820 , through which the abutment between the movable reed 230 and the normally open static contact 210 or the normally closed static contact 220 can be observed.

[0128] Exemplarily, at least one positioning rib 812 is provided in the housing 810 , and a positioning groove 140 is provided on the base 100 , and the positioning rib 812 is inserted into the positioning groove 140 , so that the base 100 is stably fixed in the housing 810 .

[0129] Exemplarily, a first glue groove 813 is provided at the bottom of the housing 810 , and after the terminal block 240 is inserted into the first glue groove 813 , it can be sealed by glue.

[0130] In this embodiment, refer to Fig.18 , Fig.19 , Figure 21 to Figure 23 As shown, the switch member 830 is disposed on the top cover 820 .

[0131] Specifically, the switch member 830 includes an operating portion 831, an intermediate portion 832 and an execution portion 833 connected in sequence, a sliding hole 826 is provided on the top cover 820, and a sinking groove 8261 is provided on the side of the top cover 820 facing the housing 810, the operating portion 831 is provided on the side of the top cover 820 facing away from the housing 810, the intermediate portion 832 is penetrated in the sliding hole 826, and the execution portion 833 is slidably provided in the sinking groove 8261. Among them, the execution portion 833 is used to push the push plate 300. Further specifically, the push plate 300 is provided with a push block 370 that can resist the execution portion 833, and the execution portion 833 can convert the push plate 300 from the second state position to the first state position by pushing the push block 370.

[0132] Exemplarily, the operating portion 831 , the middle portion 832 and the execution portion 833 form an I-shaped structure, so that the connection between the switch member 830 and the top cover 820 is stable and reliable.

[0133] Exemplarily, the operating portion 831 is provided with an anti-slip structure, such as an anti-slip pattern, and the anti-slip pattern may be convex strips arranged side by side.

[0134] In a feasible implementation, one of the operating part 831 and the top cover 820 is provided with a first slot 834 and a second slot 835, and the other is provided with a clip 827, and the operating part 831 is kept in the locked position by the clip 827 and the first slot 834. In the locked position, the push plate 300 is kept in the first state position by the abutment between the execution part 833 and the push block 370; the operating part 831 is kept in the non-locked position by the clip 827 and the second slot 835. In the non-locked position, the push plate 300 is kept in the second state position by the abutment between the execution part 833 and the push block 370. In this embodiment, when the switch member 830 is kept in the locked position between the clip 827 and the first slot 834, the electromagnetic relay non-electrical lockout test can be realized.

[0135] Exemplarily, a first card slot 834 and a second card slot 835 are provided on a side of the operating portion 831 facing the top cover 820 , and a card strip 827 is provided on a side of the top cover 820 facing away from the housing 810 .

[0136] In a feasible embodiment, a mounting channel 8262 is provided on one side edge of the top cover 820 , and the mounting channel 8262 is connected to the sliding hole 826 . The middle portion 832 is passed through the sliding hole 826 through the mounting channel 8262 , so as to facilitate the assembly of the switch component 830 on the top cover 820 .

[0137] Exemplarily, the end surface of the housing 810 may block the installation channel 8262 to prevent the installation channel 8262 from being connected to the cavity of the housing 810 through a channel other than the sliding hole 826 formed between the top cover 820 and the housing 810 .

[0138] Specifically, the switch member 830 is provided with a side plate 836 at the installation channel 8262 , and the side plate 836 can cover the sliding hole 826 to prevent foreign matter from entering the cavity of the housing 810 .

[0139] Exemplarily, the top cover 820 is made of a transparent insulating material, and the execution status of the mechanism inside the housing 810 can be observed through the top cover 820 .

[0140] For example, a transparent indication window 828 is provided on the top cover 820, and a warning mark 360 is provided on the push plate 300. When the push plate 300 slides, the warning mark 360 moves synchronously to the transparent indication window 828 for identification. The color of the warning mark 360 can be red, orange or other warning colors by color pen or two-color injection molding.

[0141] In this embodiment, Figure 1 , Figure 2 , Fig. 9 , Fig.21 and Fig.24 As shown, the electromagnetic relay also includes a lighting component 910 disposed in the shell, and a light-emitting diode 911 is provided on the lighting component 910. The light-emitting diode 911 is electrically connected to the electromagnetic body 510. The on-off state of the current electromagnetic component 500 can be determined by observing the lighting and extinguishing of the light-emitting diode 911.

[0142] Specifically, the lighting assembly 910 further includes a PCB board 912, on which a plug-in channel 9121 is provided, and the plug-in pin 530 is plugged into the plug-in channel 9121 and electrically connected to the PCB board 912 by welding, that is, the light-emitting diode 911 is electrically connected to the coil 512 through the electrical connection between the PCB board 912 and the plug-in pin 530. Further specifically, two plug-in channels 9121 are provided on the PCB board 912, and the lead-out portion 531 of the plug-in pin 530 is plugged into the plug-in channels 9121 in a one-to-one correspondence. Exemplarily, the plug-in channel 9121 can be a hole or an open groove provided at the edge of the PCB board 912. Among them, a resistor 913 can also be provided on the PCB board 912, and when the electromagnetic assembly 500 is in a powered-on state, the voltage applied to the electromagnetic assembly 500 is divided by the resistor 913, and the light-emitting diode 911 is excited and emits light.

[0143] In this embodiment, refer to Fig.16 and Fig.24 As shown, the lighting assembly 910 can be disposed on the base 100 and located at the bottom of the housing 810 to facilitate the connection between the lighting assembly 910 and the pin 530 .

[0144] Specifically, the base 100 is provided with a mounting groove 150, and the lighting assembly 910 is arranged in the mounting groove 150 to ensure the compactness of the structure of the electromagnetic relay. For example, a positioning column 151 is provided in the mounting groove 150, and a positioning hole 9122 is provided on the PCB board 912, and the positioning column 151 is inserted into the positioning hole 9122 to realize the positioning assembly of the lighting assembly 910.

[0145] Specifically, a second glue groove 814 is provided at the bottom of the housing 810 , and after the lead-out portion 531 of the insertion pin 530 is inserted into the second glue groove 814 , it can be sealed by glue.

[0146] In this embodiment, Figure 1 , Figure 2 , Fig. 9 , Fig.21 , Fig.25 and Fig.26 As shown, the electromagnetic relay further includes a light guide column 920, which is disposed on one side of the lighting assembly 910. The light of the light emitting diode 911 can be guided to the top cover 820 through the light guide column 920 for easy observation. Exemplarily, the material of the light guide column 920 can be transparent.

[0147] In some embodiments, Figure 25 to Figure 27 As shown, the light guide column 920 is disposed in the housing 810, the first end of the light guide column 920 extends to one side of the lighting assembly 910, and the second end of the light guide column 920 extends to the top cover 820, which is convenient for assembly.

[0148] Exemplarily, the first end of the light guide column 920 may be provided with a first chamfer 9211 , and the chamfered surface of the first chamfer 9211 may refract the light of the light emitting diode 911 to the first end of the light guide column 920 .

[0149] For example, the second end of the light guide column 920 is provided with a first concave arc surface 9212, and the first concave arc surface 9212 can diverge light to facilitate identification. Fig.25 and Fig.26 Arrow line in the middle.

[0150] For example, Fig. 20 and Fig. 27 As shown, a first fixing groove 815 is provided at the bottom of the housing 810 , and the first end of the light guide column 920 is inserted into the first fixing groove 815 .

[0151] In a feasible implementation manner, the second end of the light guide column 920 may abut against the top cover 820. Specifically, Fig.19 and Fig. 27As shown, the top cover 820 is provided with a second fixing groove 829, and the second end of the light guide column 920 is inserted into the second fixing groove 829. In another feasible embodiment, the top cover 820 is provided with a through hole (not shown), and the second end of the light guide column 920 is passed through the through hole, which is more convenient for identifying light.

[0152] In other embodiments, Fig.28 As shown, the top cover 820 and the light guide column 920 are integrally formed, and the light guide column 920 is disposed in the housing 810 , and the end of the light guide column 920 extends to one side of the lighting assembly 910 , so that light can better pass through the top cover 820 .

[0153] Exemplarily, the end of the light guide column 920 away from the top cover 820 may be provided with a second chamfer 922 , and the chamfered surface of the second chamfer 922 may refract the light of the light emitting diode 911 to the top cover 820 .

[0154] In some other embodiments, Fig.29 and Fig.30 As shown, a mounting platform 9231 is provided at the first end of the light guide column 920, and a light focusing groove 9232 is provided on the mounting platform 9231. The light emitting diode 911 is located in the light focusing groove 9232 to reduce the dispersion of light so that the light guide column 920 can absorb more light.

[0155] Specifically, a long groove 816 is provided on the outer side of the housing 810, and the light guide column 920 is inserted into the long groove 816, and the mounting platform 9231 extends into the housing 810 for easy assembly. Among them, a clearance groove 8161 connected to the long groove 816 is provided at the bottom of the housing 810, and the clearance groove 8161 can make way for the light guide column 920. After the light guide column 920 is installed in place, the gap between the light guide column 920 and the clearance groove 8161 can be sealed by glue.

[0156] Exemplarily, the first end of the light guide column 920 may be provided with a third chamfer 9233, and the chamfered surface of the third chamfer 9233 may refract the light of the LED 911 to the second end of the light guide column 920. The second end of the light guide column 920 may extend to the top cover 820.

[0157] Exemplarily, the second end of the light guide column 920 may be provided with a second concave arc surface 9234, and the second concave arc surface 9234 may diverge light to facilitate identification.

[0158] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the scope of protection of the present invention. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the scope of protection of the claims of the present invention.

Claims

1. An electromagnetic relay, characterized in that: include: Base (100); A contact piece assembly (200) is arranged on the base (100), the contact piece assembly (200) comprising a normally open static contact (210) and a normally closed static contact (220) arranged opposite to each other, and a movable spring piece (230) arranged between the normally open static contact (210) and the normally closed static contact (220); A push plate (300) is connected to the movable spring (230), and the push plate (300) has a first state position and a second state position; wherein, In the first state, the movable spring (230) abuts against the normally open static contact (210); In the second state, the movable spring (230) abuts against the normally closed static contact (220); and A first elastic member (400) is disposed between the base (100) and the push plate (300); The electromagnetic assembly (500) is arranged on the base (100), the electromagnetic assembly (500) comprises an electromagnetic body (510), an armature (520) and a second elastic member (700), the first end of the armature (520) is connected to the push plate (300), the second end of the armature (520) is connected to the second elastic member (700), and the electromagnetic assembly (500) has a power-off state and a power-on state; wherein, The first elastic member (400) and the second elastic member (700) both enable the push plate (300) to always have a tendency to switch from the first state position to the second state position and enable the armature (520) to always have a tendency to move away from the electromagnetic body (510); In the power-off state, the armature (520) is separated from the electromagnetic body (510), and the push plate (300) is maintained in the second state position; In the power-on state, the electromagnetic body (510) and the armature (520) are attracted, and the push plate (300) is maintained in the first state position.

2. The electromagnetic relay according to claim 1, characterized in that: The base (100) is provided with a first protrusion (111), a second protrusion (112) and a third protrusion (113) arranged in a triangular shape; The first elastic member (400) includes a first side portion (410) and a second side portion (420) which are arranged at an angle, wherein the first side portion (410) is arranged between the first protrusion (111) and the second protrusion (112), the second side portion (420) is arranged between the second protrusion (112) and the third protrusion (113), and the first side portion (410) is connected to the push plate (300).

3. The electromagnetic relay according to claim 2, characterized in that: A stopper (310) is provided on one side of the push plate (300) facing the first elastic member (400), and the stopper (310) abuts against a side surface of the first edge portion (410); and / or The push plate (300) is provided with a connection hole, and the first edge portion (410) is inserted into the connection hole.

4. The electromagnetic relay according to claim 2, characterized in that: The base (100) is provided with a receiving groove (110), the first protrusion (111) and the third protrusion (113) are arranged on the side wall of the receiving groove (110), the first elastic member (400) is arranged in the receiving groove (110), and the first edge portion (410) extends outside the receiving groove (110) and is connected to the push plate (300).

5. The electromagnetic relay according to claim 1, characterized in that: The second elastic member (700) comprises a first folded edge (710) and a second folded edge (720) which are arranged at an angle, a slot (701) is formed between the first folded edge (710) and the electromagnetic body (510), the second folded edge (720) is connected to the electromagnetic body (510), the second end of the armature (520) is inserted into the slot (701), and a first limiting groove (521) is provided on the side of the armature (520) facing the first folded edge (710), a third folded edge (730) is provided on the first folded edge (710), the third folded edge (730) is extended toward the second folded edge (720), and the end of the third folded edge (730) is arranged in the first limiting groove (521).

6. The electromagnetic relay according to claim 5, characterized in that: A fourth folded edge (740) is provided on the second folded edge (720), and the fourth folded edge (740) is extended toward the first folded edge (710). The fourth folded edge (740) is abutted against the second end of the armature (520), and the end of the fourth folded edge (740) is bent toward the armature (520) to form a limited edge (741), and the limited edge (741) is abutted against the side of the armature (520) facing the first folded edge (710).

7. The electromagnetic relay according to claim 6, characterized in that: A second limiting groove (522) is provided on the side of the second end of the armature (520) facing the first folded edge (710), and the limiting edge (741) is arranged in the second limiting groove (522).

8. The electromagnetic relay according to claim 1, characterized in that: The movable reed piece (230) is provided with a movable contact point (231), and the movable reed piece (230) is provided with a semi-annular groove (232) surrounding the movable contact point (231).

9. The electromagnetic relay according to claim 1, characterized in that: The push plate (300) is provided with a coil spring (600), the coil spring (600) can abut against the movable spring sheet (230), and the coil spring (600) is configured to provide a force for the movable spring sheet (230) to press the normally open static contact (210).

10. The electromagnetic relay according to claim 1, characterized in that: The invention also includes a shell and a switch component (830) arranged outside the shell, wherein the shell is provided with the base (100), the contact assembly (200), the push plate (300), the first elastic component (400) and the electromagnetic assembly (500), and the switch component (830) is connected to the push plate (300), and the switch component (830) is used to push the push plate (300) to slide between the first state position and the second state position.

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