An insulation protection structure and electromagnetic relay

Abstract

The application discloses an insulation protection structure and an electromagnetic relay, and relates to the technical field of electromagnetic relays. The application comprises an insulator, an installation cavity is formed in the insulator, a partition plate is arranged in the installation cavity, and an insulating sleeve is fixed to one side of the partition plate. The application separates the enameled coil from the normally open contact, the normally closed contact and the movable contact in another cavity by adopting the cooperation design of the insulating sleeve, the movable plate and the driving plate, and then when the enameled coil is powered off, the iron core stops adsorbing the magnetic adsorption plate, and the driving plate is reset under the action of the first torsional spring, the movable plate can be driven to slide to separate the movable contact from the normally open contact, and then the blocking assembly can be driven to move by the movable plate to block the electric arc between the normally open contact and the movable contact. Compared with the prior art, the application can solve the safety hazards of the discharge creeping of the electromagnetic relay and the safety hazards of the arc drawing of the electromagnetic relay.

Description

Technical Field

[0001] This application relates to the field of electromagnetic relay technology, specifically to an insulation protection structure and an electromagnetic relay. Background Technology

[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 commonly used in automatic control circuits. In fact, it is an "automatic switch" that uses a small current and a low voltage to control a large current and a high voltage. Therefore, it plays a role in automatic adjustment, safety protection, and circuit switching in the circuit. Electromagnetic relays are widely used in aviation, aerospace, shipbuilding, home appliances and other fields. They mainly perform functions such as signal transmission, execution control and system power distribution. They are one of the key electronic components in various systems.

[0003] A search revealed a utility model patent with publication number CN218996610U, which discloses a relay with enhanced insulation. This relay utilizes an insulating frame structure and a fitted insulating sheet body structure to effectively insulate the enameled coil from the yoke and armature, preventing current breakdown. Furthermore, the raised rim completely covers the vertical surface of the yoke, effectively avoiding the risk of discharge creepage. This solves the problem of traditional relays relying solely on increasing the creepage distance to address creepage risk. Simultaneously, the stepped insulating wall increases the creepage distance between the insulating spring and the core, preventing the load from not being completely disconnected, significantly improving insulation performance. However, in existing technologies, when the electrical... When magnetic relays are used in high-voltage circuits, they not only pose a risk of discharge and creepage but also a safety hazard of arcing. Arcing specifically refers to the electric arc that is easily generated at the moment the relay disconnects (the moving contact separates from the normally open contact). The arc can easily break down the air, and at this time, the normally open and normally closed contacts can be connected to the moving contact through the arc, causing a short circuit. The above-disclosed technical solutions only solve the risk of discharge and creepage between the coil and the yoke, but do not solve the safety hazard of relay arcing, resulting in limited improvement in the relay's insulation effect and poor safety. In order to reasonably improve this problem, this application proposes an insulation protection structure and an electromagnetic relay. Summary of the Invention

[0004] The purpose of this application is to address the safety hazards of discharge creepage and arcing that exist simultaneously when electromagnetic relays are used in high-voltage circuits. In the prior art, only the risk of discharge creepage between the coil and the yoke is solved, but the safety hazard of relay arcing is not solved, resulting in limited improvement in the insulation effect of the relay and poor safety. This application provides an insulation protection structure and an electromagnetic relay.

[0005] To achieve the above objectives, this application specifically adopts the following technical solution:

[0006] An insulating protective structure, comprising:

[0007] An insulator has an internal mounting cavity. A partition is provided inside the mounting cavity. An insulating sleeve is fixed to one side of the partition. An enameled coil is threaded around the outer side of the insulating sleeve, and an iron core is fixed to the inner side. A drive plate is hinged inside the mounting cavity. The drive plate is connected to the mounting cavity through a first torsion spring. A magnetic suction plate is fixed on the drive plate and is magnetically connected to the end of the iron core.

[0008] A movable slot is formed on the partition plate. The end of the drive plate movably passes through the movable slot. A movable plate is slidably fitted on the other side of the partition plate. The movable plate is movably hinged to the end of the drive plate. Normally open contacts and normally closed contacts are distributed at intervals in the mounting cavity. A movable contact is provided between the two. The movable contact is installed on the movable plate. A spring wire is connected to the movable contact. A blocking component is provided in the mounting cavity and is linked with the movable plate. The blocking component is used to block the connection between the movable contact and the electric arc.

[0009] Furthermore, the drive plate includes a first section and a second section connected to each other, with an obtuse angle between them. A magnetic suction plate is disposed on the first section, and a waist hole is opened on the second section. A guide post is constructed on the movable plate, and the guide post is slidably tangent to the waist hole.

[0010] Furthermore, the blocking assembly includes a hinge plate hinged to the partition, an insulating sheet connected to the end of the hinge plate, a stop block constructed on the movable plate, an inclined arc surface provided on the stop block, the hinge plate and the partition are connected by a second torsion spring, and the hinge plate and the arc surface are movably overlapped.

[0011] Furthermore, an arc-extinguishing component is provided inside the mounting cavity.

[0012] Furthermore, the arc extinguishing assembly includes an arc extinguishing groove disposed on one side of the normally open contact, wherein multiple conductive sheets are spaced apart in the arc extinguishing groove, and a wind power assembly is disposed on the other side of the normally open contact.

[0013] Furthermore, the wind power component includes an installation pipe, the end of which is connected to the inner wall of the installation cavity. A fan blade is rotatably installed inside the end of the installation pipe. Multiple air inlets are distributed in a ring around the periphery of the installation pipe. The fan blade is equipped with a transmission mechanism that is linked and cooperates with the movable plate.

[0014] Furthermore, the transmission mechanism includes a small gear coaxially connected to the fan blades, a large gear rotatably mounted on the inner wall of the mounting cavity, an opening at the end of the mounting tube, through which the large gear meshes with the small gear, and a rack meshing with the large gear is connected to the movable plate.

[0015] Furthermore, a fixed plate is constructed on the movable plate, and a tension spring is connected to the inner wall of the mounting cavity, with its end connected to the side of the fixed plate away from the normally open contact.

[0016] Furthermore, the mounting cavity has a cylindrical structure with a sliding through-fixed plate. A tension spring and a spring wire are respectively sleeved on both ends of the cylinder and separated by the fixed plate.

[0017] An electromagnetic relay includes the aforementioned insulating protection structure and a housing. An insulator is constructed inside the housing. The bottom of the housing is provided with multiple pins, and an enameled coil, normally open contacts, normally closed contacts, and spring wires are electrically connected to the multiple pins respectively.

[0018] The beneficial effects of this application are as follows:

[0019] This application employs a design that combines an insulating sleeve, a movable plate, and a drive plate to isolate the enameled coil from the normally open, normally closed, and moving contacts in another chamber. Then, by using a blocking component, when the enameled coil is de-energized, the iron core stops attracting the magnetic plate, and the drive plate resets under the action of the first torsion spring, the movable plate can be driven to slide, separating the moving contact from the normally open contact. Subsequently, the blocking component can be activated by the movable plate to block the arc between the normally open and moving contacts. Compared with existing technologies, this application solves both the safety hazards of discharge creepage and arcing in electromagnetic relays.

[0020] This application employs a bending design of the drive plate, so that when the drive plate is lifted, the bent portions of the first and second sections can contact the inner wall of the mounting cavity, thereby maximizing the stroke of the second section, increasing the sliding stroke of the movable plate, and widening the gap between the normally open and normally closed contacts, so as to facilitate the blocking component to block the arc between the moving contact and the normally open contact.

[0021] This application employs a blocking component design. When the movable plate slides toward the normally open contact, the hinge plate can slide on the arc surface, causing the insulating sheet to move away from the movable plate. Subsequently, the moving contact can abut against the normally open contact. When the movable plate slides toward the normally closed contact, the arc is lengthened, the electric field weakens, and the hinge plate can slide in the opposite direction on the arc surface. Under the action of the second torsion spring, the hinge plate can move toward the movable plate, and the insulating sheet is inserted between the normally open contact and the moving contact, thereby blocking the arc. Attached Figure Description

[0022] Figure 1 This is a three-dimensional structural diagram of the electromagnetic relay in the energized state of this application;

[0023] Figure 2 This application Figure 1 A partial structural sectional view;

[0024] Figure 3 This is a partial structural cross-sectional view of the electromagnetic relay in the de-energized state of this application;

[0025] Figure 4 This application Figure 3 Enlarged view of point A;

[0026] Figure 5 This application Figure 3 Structural side view;

[0027] Figure 6 This is a structural cross-sectional view of the wind turbine component of this application;

[0028] Reference numerals: 1. Insulator; 2. Mounting cavity; 3. Partition plate; 4. Insulating sleeve; 5. Enamelled coil; 6. Iron core; 7. Drive plate; 701. First section; 702. Second section; 703. Waist hole; 704. Guide post; 705. Roller; 8. First torsion spring; 9. Magnetic suction plate; 10. Movable groove; 11. Movable plate; 1101. Slide rail; 12. Normally open contact; 13. Normally closed contact; 14. Moving contact; 15. Spring wire; 16. Blocking assembly; 1601. Hinge plate; 1602. Insulating sheet; 1603. 1604. Abutment block; 1605. Arc surface; 1606. Second torsion spring; 17. Arc extinguishing assembly; 1701. Arc extinguishing groove; 1702. Conductive sheet; 1703. Wind power assembly; 17031. Mounting tube; 17032. Fan blade; 17033. Air inlet; 17034. Transmission mechanism; 170341. Small gear; 170342. Large gear; 170343. Opening; 170344. Rack; 18. Fixing plate; 19. Tension spring; 20. Cylinder; 21. Housing; 22. Pin; 23. Fixing block. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings.

[0030] like Figures 1-6 As shown, an embodiment of this application proposes an insulating protection structure, comprising:

[0031] Insulator 1, in block shape, is made of polycarbonate material with good insulation properties. Insulator 1 has an internal mounting cavity 2, which is divided into two chambers by a partition 3. An insulating sleeve 4 is fixed to one side of the partition 3. The insulating sleeve 4 is made of epoxy resin, has a smooth surface, and good insulation properties. An enameled coil 5 is threaded around the outer side of the insulating sleeve 4, and an iron core 6 is fixed to the inner side. The iron core 6 is made of soft magnetic materials such as silicon steel sheets. A drive plate 7 is hinged inside the mounting cavity 2, close to the end of the iron core 6, and hinged to the side of the mounting cavity 2 away from the partition 3. The drive plate 7 is connected to the mounting cavity 2... The mounting cavity 2 is connected by a first torsion spring 8. The fixed end of the first torsion spring 8 is connected to the inner wall of the mounting cavity 2. The movable end of the drive plate 7 is connected to the drive plate 7, so that the drive plate 7 can be driven to rotate away from the iron core 6. A magnetic suction plate 9 is fixed on the drive plate 7. The magnetic suction plate 9 is an iron plate and is located on the side of the drive plate 7 close to the iron core 6. The magnetic suction plate 9 is magnetically connected to the end of the iron core 6. When the enameled coil 5 is powered on, the iron core 6 is magnetized. The drive plate 7 can rotate towards the iron core 6 under the action of magnetic force. The iron core 6 can attract the magnetic suction plate 9. When the enameled coil 5 is de-energized, the iron core 6 stops attracting the magnetic suction plate 9, and the drive plate 7 can be reset under the action of the first torsion spring 8.

[0032] A movable slot 10 is formed on the partition 3. The end of the drive plate 7 moves through the movable slot 10. When the iron core 6 attracts the magnetic plate 9, the drive plate 7 contacts one end of the movable slot 10. When the drive plate 7 returns to its original position, it contacts the other end of the movable slot 10. A movable plate 11 is slidably fitted on the other side of the partition 3. Both the movable plate 11 and the drive plate 7 are made of epoxy resin and have insulating properties. The inner wall of the partition 3 is constructed with a slide rail 1101 parallel to the movable slot 10. The movable plate 11 is slidably mounted on the slide rail 1101 and... The end of the drive plate 7 is hinged. When the drive plate 7 slides in the movable slot 10, it can drive the movable plate 11 to slide. Normally open contacts 12 and normally closed contacts 13 are spaced apart in the mounting cavity 2. Two fixing blocks 23 are constructed within the mounting cavity 2, and the normally open contacts 12 and normally closed contacts 13 are respectively fixed to the two fixing blocks 23. A moving contact 14 is provided between them and is mounted on the movable plate 11. When the iron core 6 attracts the magnetic plate 9, the drive plate 7 can drive the movable plate 11 to slide towards the normally open contact 12. When the normally open contact 14 contacts the normally open contact 12, the circuit is connected. When the drive plate 7 is reset, the drive plate 7 can drive the movable plate 11 to slide toward the normally closed contact 13. The movable contact 14 separates from the normally open contact 12 and contacts the normally closed contact 13. At this time, the circuit is broken. A spring wire 15 is connected to the movable contact 14, which can be stretched as the movable plate 11 moves. The mounting cavity 2 is provided with a blocking component 16. The blocking component 16 has insulating properties and is linked with the movable plate 11. The blocking component 16 is used to block the connection between the movable contact 14 and the electric arc. When the moving contact 14 separates from the normally open contact 12, that is, when the electromagnetic relay is disconnected, the gap between the normally open contact 12 and the moving contact 14 is small. The voltage breaks down the air and generates a high-temperature, highly conductive free gas—an electric arc. At this time, the electric arc can be elongated as the moving contact 14 moves. Subsequently, when the moving contact 14 is not in contact with the normally closed contact 13, the blocking component 16 can be driven by the movable plate 11 to block the electric arc between the moving contact 14 and the normally open contact 12, thereby effectively solving the safety hazard of relay arcing.

[0033] The enameled coil 5 is protected by the insulating sleeve 4, which prevents the outer insulating varnish from being worn away, thus preventing the iron core 6 from short-circuiting. Then, the enameled coil 5 is separated from another chamber by the partition 3. The enameled coil 5 is separated from the normally open contact 12, normally closed contact 13 and moving contact 14 by the cooperation of the movable plate 11 with insulating properties and the drive plate 7. This makes it less likely for the electromagnetic relay to discharge and creepage during use. When the moving contact 14 separates from the normally open contact 12 and moves toward the normally closed contact 13, the arc between the normally open contact 12 and the moving contact 14 can be blocked by the blocking component 16 to prevent the circuit from short-circuiting.

[0034] This application employs a design that combines an insulating sleeve 4, a movable plate 11, and a drive plate 7 to separate the enameled coil 5 from the normally open contact 12, normally closed contact 13, and moving contact 14 in another chamber. Then, by using a blocking component 16, when the enameled coil 5 is de-energized, the iron core 6 stops attracting the magnetic plate 9, and the drive plate 7 resets under the action of the first torsion spring 8, the movable plate 11 can be driven to slide, separating the moving contact 14 from the normally open contact 12. Subsequently, the blocking component 16 can be activated by the movable plate 11 to block the arc between the normally open contact 12 and the moving contact 14. Compared with existing technologies, this application can solve both the safety hazards of discharge creepage and arcing in electromagnetic relays, thereby improving the safety performance of electromagnetic relays.

[0035] like Figures 1-6 As shown, in some embodiments, the drive plate 7 includes a first segment 701 and a second segment 702 connected to each other, with an obtuse angle between them. A partition 3 is located inside the angle between the first segment 701 and the second segment 702. The first segment 701 is hinged to the inner wall of the mounting cavity 2. A magnetic plate 9 is disposed on the first segment 701. A waist hole 703 is formed on the second segment 702, extending along the length of the second segment 702. A guide post 704 is constructed on the movable plate 11, slidingly tangentially to the waist hole 703. When the drive plate 7 rotates along its hinge point, the guide post 704 can move within the waist hole 703. The sliding mechanism 3 drives the movable plate 11 to slide. The roller 705 is rotated around the guide post 704 to reduce wear between the guide post 704 and the waist hole 703. The stroke of the end of the drive plate 7 is greater than the stroke of the magnetic plate 9. When the drive plate 7 is lifted, the bent parts of the first section 701 and the second section 702 can contact the inner wall of the mounting cavity 2 to maximize the stroke of the second section 702. This increases the sliding stroke of the movable plate 11 and widens the gap between the normally open contact 12 and the normally closed contact 13 so that the blocking assembly 16 can block the arc between the moving contact 14 and the normally open contact 12.

[0036] like Figures 2-6As shown, in some embodiments, the blocking assembly 16 includes a hinge plate 1601 hinged to the partition 3. An insulating sheet 1602, which is a ceramic sheet and circular in shape, is connected to the end of the hinge plate 1601. A stop block 1603 is constructed on the movable plate 11, located on the side of the movable plate 11 facing the hinge plate 1601. An arc surface 1604 is inclinedly provided on the stop block 1603. The distance between the arc surface 1604 and the movable plate 11 gradually increases from the normally open contact 12 towards the normally closed contact 13. The hinge plate 1601 and the partition 3 are connected by a second torsion spring 1605. The fixed end of the second torsion spring 1605 is fixed to the partition 3. The movable end of the mounting tube 17031 is connected to the hinge plate 1601. 1. The hinge plate 1601 is movably connected to the arc surface 1604. Under the action of the second torsion spring 1605, the hinge plate 1601 rests on the movable plate 11. When the movable plate 11 slides toward the normally open contact 12, the hinge plate 1601 can slide on the arc surface 1604 and drive the insulating sheet 1602 to move away from the movable plate 11. Then the moving contact 14 can abut against the normally open contact 12. When the movable plate 11 slides toward the normally closed contact 13, the arc is lengthened and the electric field weakens. The hinge plate 1601 can slide in the opposite direction on the arc surface 1604. Under the action of the second torsion spring 1605, the hinge plate 1601 can move toward the movable plate 11. The insulating sheet 1602 is inserted between the normally open contact 12 and the moving contact 14 to block the arc.

[0037] like Figure 2 , Figure 3 , Figure 4 and Figure 6 As shown, in some embodiments, the mounting cavity 2 is provided with an arc-extinguishing component 17. Since an electric arc is a free gas with high temperature and high conductivity generated by voltage breakdown of air, it is easily deformed. When the electric arc bypasses the insulating sheet 1602 and connects with the moving contact 14, the moving contact 14 often needs to continue to slide in order to break the electric arc. The arc-extinguishing component 17 can eliminate the electric arc around the insulating sheet 1602, and can quickly block the electric arc in conjunction with the insulating sheet 1602.

[0038] like Figure 2 , Figure 3 , Figure 4 and Figure 6As shown, in some embodiments, the arc-extinguishing assembly 17 includes an arc-extinguishing groove 1701 disposed on one side of the normally open contact 12. The arc-extinguishing groove 1701 is constructed on the inner wall of the mounting cavity 2, with the groove opening facing the normally open contact 12. A plurality of conductive sheets 1702 are spaced apart inside the arc-extinguishing groove 1701. The conductive sheets 1702 are stainless steel plates, and the plurality of conductive sheets 1702 are arranged in a grid pattern. A wind power assembly 1703 is disposed on the other side of the normally open contact 12. The normally open contact 12 and the groove opening of the arc-extinguishing groove 1701 are connected. Both are located in the output direction of the wind turbine component 1703. When the insulating sheet 1602 is inserted between the normally open contact 12 and the moving contact 14, the insulating sheet 1602 moves toward the slot of the wind turbine component 1703. At this time, the wind turbine component 1703 can blow the electric arc toward the insulating sheet 1602 to deform. Then the insulating sheet 1602 can block the electric arc, and the broken electric arc can enter the arc extinguishing groove 1701 and be divided into multiple segments by multiple conductive sheets 1702, and finally extinguished.

[0039] like Figure 2 , Figure 3 , Figure 4 and Figure 6 As shown, in some embodiments, the wind power component 1703 includes a mounting tube 17031. The end of the mounting tube 17031 is connected to the inner wall of the mounting cavity 2. A fan blade 17032 is rotatably mounted inside the end of the mounting tube 17031. The fan blade 17032 is coaxial with the mounting tube 17031. Multiple air inlets 17033 are distributed in a ring around the periphery of the mounting tube 17031. A transmission mechanism 17034 is provided on the fan blade 17032 and is linked with the movable plate 11. When the movable plate 11 slides toward the normally closed contact 13, the fan blade 17032 can be driven to rotate through the transmission mechanism 17034. At this time, the air in the mounting cavity 2 enters the mounting tube 17031 through the air inlet 17033 and is discharged from the end of the mounting tube 17031, thereby blowing the electric arc to deform.

[0040] like Figure 3 , Figure 4 and Figure 6 As shown, in some embodiments, the transmission mechanism 17034 includes a small gear 170341 coaxially connected to the fan blade 17032, a large gear 170342 rotatably mounted on the inner wall of the mounting cavity 2, and an opening 170343 at the end of the mounting tube 17031. The large gear 170342 meshes with the small gear 170341 through the opening 170343, which is a speed-increasing motion. A rack 170344 meshing with the large gear 170342 is connected to the movable plate 11. When the movable plate 11 slides toward the normally closed contact 13, the rack 170344 can drive the large gear 170342 to drive the small gear 170341 to rotate, thereby driving the fan blade 17032 to rotate.

[0041] like Figure 2 , Figure 3 and Figure 5 As shown, in some embodiments, a fixed plate 18 is constructed on the movable plate 11, and a tension spring 19 is connected to the inner wall of the mounting cavity 2. Here, the inner wall is close to and parallel to the normally closed contact 13, and the end is connected to the side of the fixed plate 18 away from the normally open contact 12. The tension spring 19 is used to provide a pulling force that forces the fixed plate 18 to drive the movable plate 11 toward the normally closed contact 13. When the iron core 6 attracts the magnetic sheet, the tension spring 19 is pulled open and absorbs the kinetic energy. When the iron core 6 stops attracting the magnetic sheet, the tension spring 19 can cooperate with the first torsion spring 8 to make the movable plate 11 quickly reset. The power for the rack 170344 to drive the large gear 170342 to rotate comes from this.

[0042] like Figure 2 , Figure 3 and Figure 5 As shown, in some embodiments, a cylinder 20 is constructed inside the mounting cavity 2, which slides through the fixed plate 18. The axis of the cylinder 20 is parallel to the sliding direction of the movable plate 11. The tension spring 19 and the spring wire 15 are respectively sleeved on both ends of the cylinder 20 and separated by the fixed plate 18. This design can protect the tension spring 19 and the spring wire 15, so that they are not easily twisted or deformed when stretched and contracted.

[0043] An electromagnetic relay includes the above-mentioned insulation protection structure and a housing 21. An insulator 1 is constructed inside the housing 21. A plurality of pins 22 are provided at the bottom of the housing 21. An enameled coil 5, a normally open contact 12, a normally closed contact 13 and a spring wire 15 are electrically connected to the plurality of pins 22 respectively.

[0044] The above description of the disclosed embodiments enables those skilled in the art to make or use this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An insulation protection structure for an electromagnetic relay, characterized in that, include: An insulator (1) has an installation cavity (2) inside. A partition (3) is provided inside the installation cavity (2). An insulating sleeve (4) is fixed on one side of the partition (3). An enameled coil (5) is spirally wound on the outer side of the insulating sleeve (4), and an iron core (6) is fixed on the inner side. A drive plate (7) is hinged inside the installation cavity (2). The drive plate (7) is connected to the installation cavity (2) through a first torsion spring (8). A magnetic suction plate (9) is fixed on the drive plate (7), and the magnetic suction plate (9) is magnetically connected to the end of the iron core (6). The movable slot (10) is opened on the partition plate (3). The end of the drive plate (7) is movably inserted through the movable slot (10). The other side of the partition plate (3) is slidably fitted with a movable plate (11). The movable plate (11) is movably hinged to the end of the drive plate (7). The mounting cavity (2) is spaced apart with normally open contacts (12) and normally closed contacts (13). A movable contact (14) is provided between them. The movable contact (14) is installed on the movable plate (11). A spring wire (15) is connected to the movable contact (14). The mounting cavity (2) is provided with a blocking component (16), which is linked with the movable plate (11). The blocking component (16) is used to block the connection between the movable contact (14) and the electric arc. The drive plate (7) includes a first section (701) and a second section (702) connected to each other, with an obtuse angle between them. A magnetic suction plate (9) is provided on the first section (701), and a waist hole (703) is provided on the second section (702). A guide post (704) is constructed on the movable plate (11), and the guide post (704) and the waist hole (703) are slidably tangent. The blocking assembly (16) includes a hinge plate (1601) hinged to the partition (3), an insulating sheet (1602) connected to the end of the hinge plate (1601), a stop block (1603) constructed on the movable plate (11), an arc surface (1604) inclinedly provided on the stop block (1603), the hinge plate (1601) and the partition (3) are connected by a second torsion spring (1605), and the hinge plate (1601) and the arc surface (1604) are movably overlapped.

2. The insulation protection structure of the electromagnetic relay according to claim 1, characterized in that, The mounting cavity (2) is equipped with an arc extinguishing component (17).

3. The insulation protection structure of the electromagnetic relay according to claim 2, characterized in that, The arc extinguishing assembly (17) includes an arc extinguishing groove (1701) located on one side of the normally open contact (12), and a plurality of conductive sheets (1702) are spaced apart in the arc extinguishing groove (1701). A wind power assembly (1703) is located on the other side of the normally open contact (12).

4. The insulation protection structure of the electromagnetic relay according to claim 3, characterized in that, The wind power component (1703) includes an installation pipe (17031), the end of which is connected to the inner wall of the installation cavity (2). A fan blade (17032) is rotatably installed inside the end of the installation pipe (17031). Multiple air inlets (17033) are distributed in a ring around the periphery of the installation pipe (17031). A transmission mechanism (17034) is provided on the fan blade (17032) and is linked and cooperated with the movable plate (11).

5. The insulation protection structure of the electromagnetic relay according to claim 4, characterized in that, The transmission mechanism (17034) includes a small gear (170341) coaxially connected to the fan blade (17032), a large gear (170342) is rotatably mounted on the inner wall of the mounting cavity (2), and an opening (170343) is constructed at the end of the mounting tube (17031). The large gear (170342) meshes with the small gear (170341) through the opening (170343). A rack (170344) that meshes with the large gear (170342) is connected to the movable plate (11).

6. The insulation protection structure of the electromagnetic relay according to claim 5, characterized in that, A fixed plate (18) is constructed on the movable plate (11), and a tension spring (19) is connected to the inner wall of the mounting cavity (2), the end of which is connected to the side of the fixed plate (18) away from the normally open contact (12).

7. The insulation protection structure of the electromagnetic relay according to claim 6, characterized in that, The mounting cavity (2) contains a cylinder (20) that slides through a fixing plate (18). A tension spring (19) and a spring wire (15) are respectively sleeved on both ends of the cylinder (20) and separated by the fixing plate (18).

8. An electromagnetic relay, comprising the insulation protection structure of the electromagnetic relay according to any one of claims 1-7, characterized in that, It also includes a housing (21), an insulator (1) constructed inside the housing (21), and a plurality of pins (22) provided at the bottom of the housing (21). The enameled coil (5), normally open contact (12), normally closed contact (13) and spring wire (15) are electrically connected to the plurality of pins (22).

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