An electromagnetic relay

Abstract

The present invention discloses an electromagnetic relay, comprising a base, a cover, a coil, a moving reed and two static reeds, the cover is fixedly connected to the base, the coil is between the base and the cover, a plurality of moving contacts are arranged on the moving reed, each static reed comprises a plate-like base, a part of one side of the plate-like base extends outward and bends to form a static contact fixing part, a static contact is fixedly arranged on the static contact fixing part, and a clearance through hole is arranged on the base; the two static reeds are respectively fixedly connected to the outer surface of the base by using the plate-like base at intervals, each of the static contact fixing parts extends between the base and the cover through the clearance through hole, each of the static contacts corresponds to a moving contact on the moving reed; the plate-like base part on each static reed extends out of the cover to form a connecting part. The present invention improves the heat dissipation effect of the static reed, improves the performance of the relay, simplifies the preparation process, reduces the preparation cost, and prolongs the service life of the relay.

Description

Technical Field

[0001] The present invention relates to the technical field of relay manufacturing, and in particular to an electromagnetic relay. Background Art

[0002] An electromagnetic relay is an electronic control device. It has a control system (also known as an input circuit) and a controlled system (also known as an output circuit), and is usually applied to an automatic control circuit. It is actually an "automatic switch" that uses a smaller current and a lower voltage to control a larger current and a higher voltage. Therefore, it plays roles such as automatic regulation, safety protection, and circuit conversion in the circuit.

[0003] An electromagnetic relay, especially a clapper relay, generally includes a base, a cover, a coil, a moving reed, and two static reeds. The cover is fixedly connected to the base. The coil is wound around a coil bobbin, and the coil bobbin is fixedly connected to the base. An iron core is installed in the central hole of the coil bobbin. A yoke is fixedly connected to the coil bobbin. The moving reed is bent in the middle. One end of the moving reed is fixedly connected to the yoke, and the other end of the moving reed is fixedly connected to an armature. The armature corresponds to the iron core. The two static reeds are fixedly connected to the base, and two static contacts on the two static reeds correspond to two moving contacts on the moving reed. For some existing electromagnetic relays with relatively large power, due to the large volume of the static reeds and the large occupied space, in order to reduce the space occupation and facilitate the arrangement and fixation of the lead-out ends of the static reeds, the main body part of the static reeds is usually integrally injection-molded with the base. However, when the main body of the static reed is integrally injection-molded with the base, there are problems: 1. The heat dissipation of the static reed is poor, which affects the performance of the relay; especially for large-current electromagnetic relays (such as relays with a contact current reaching 200 A and above), the heat generation Q = I 2 *R*t, and the heat generation is proportional to the square value of the current. The heat generation of large-current relays is very large. If effective and rapid heat dissipation cannot be achieved, the relay is extremely likely to fail due to high temperature; 2. The injection molding process is complex and the defective rate is relatively high, resulting in a relatively high preparation cost; 3. The contacts of the static reeds are transferred to the supplier for insert injection molding and then returned to the factory. The turnover time is long and they are exposed in a non-clean space for a long time, and are extremely likely to be contaminated, which also affects the quality and service life of the relay. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide an electromagnetic relay, which can preferably improve the heat dissipation effect of the static reed, enhance the performance of the relay, simplify the preparation process, reduce the preparation cost, and extend the service life of the relay.

[0005] To achieve the above object, the technical scheme of the present invention is: an electromagnetic relay, including a base, a cover, a coil, a moving spring and two stationary springs, the cover is fixedly connected to the base, the coil is wound on a coil frame, the coil frame is fixedly connected to the base, the coil is between the base and the cover, an iron core is installed in the center hole of the coil, a yoke is fixedly connected to the coil frame, the moving spring is bent along the middle part, one end of the moving spring is fixedly connected to the yoke, the other end of the moving spring is fixedly connected to an armature, and a plurality of moving contacts are also arranged on the other end of the moving spring, the armature corresponds to one end of the iron core, and the other end of the iron core The ends are connected to the yoke iron or the yoke iron is connected through a magnetic steel, each static spring piece includes a plate-like base, a part of one side of the plate-like base extends outward and is bent to form a static contact fixing part, a static contact is fixed on the static contact fixing part, and a clearance through hole is provided on the base; the two static spring pieces are respectively fixedly connected to the outer surface of the base by using the plate-like base at intervals, each of the static contact fixing parts extends into between the base and the cover shell through the clearance through hole, and each of the static contacts corresponds to a moving contact on the moving spring piece; the plate-like base part on each static spring piece extends out of the cover shell to form a connecting part.

[0006] As a further improvement, a portion of the three sides of the plate-like base on each static spring piece extends outward and is bent to form a riveted fixing portion, and a corresponding plurality of riveted holes are provided on the base, and each riveted fixing portion is matched with a riveted hole so that the plate-like base is fixedly connected to the outer side of the base; the static contact fixing portion on each static spring piece is perpendicular to its plate-like base. This can facilitate the assembly and fixing of the static spring piece and the base, and improve the manufacturing efficiency.

[0007] As a further improvement, the base is provided with an assembly area on one side close to the other end of the moving spring, and a rubber block is fixedly connected to the assembly area, which limits the moving distance of the other end of the moving spring for rebounding and provides a buffering effect. This can greatly reduce the noise generated by the rebound of the moving spring.

[0008] Preferably, the rubber block comprises a block-shaped body, and a positioning protrusion extends outward from the rear of the left and right sides of the block-shaped body respectively, and the rubber block is positioned with the assembly area through the upper and lower sides of the block-shaped body and the two positioning protrusions, and the front side of the block-shaped body protrudes from the assembly area and faces the other end of the movable spring;

[0009] The base is provided with a bottom, and a side portion extends upward from one side of the bottom. The assembly area includes a groove provided on the inner side of the side portion. The groove extends downward and penetrates a part of the bottom. A clamping groove is provided on each of the two inner side surfaces of the groove. The lower part of the groove penetrating one side of the bottom is provided with a lower limit projection. When the rubber block is installed in the assembly area, the lower side surface of the square-shaped main body abuts against the lower limit projection, the upper side surface of the square-shaped main body abuts against the upper side of the groove, the front side surface of the square-shaped main body protrudes from the inner side surface of the side portion, and the two positioning protrusions are respectively matched with the two clamping grooves. This makes the assembly performance of the rubber block better and prevents it from falling off.

[0010] Further improvement: A cover plate covers the relief through-hole. The cover plate is fixedly connected to the base and also covers a part of each static reed. The cover plate is provided with a first glue-pointing groove, and a plurality of penetration through-holes are provided on the first glue-pointing groove. Each penetration through-hole communicates with the surface of one static reed. A second glue-pointing groove is formed between a part of the edge of the cover plate and the base. The second glue-pointing groove communicates with the first glue-pointing groove. Glue is applied through the second glue-pointing groove and the first glue-pointing groove to seal the periphery of the relief through-hole. This can better protect the moving contact and the static contact and extend the service life of the relay.

[0011] Preferably, the penetration through-holes are round holes. The plurality of penetration through-holes are divided into two parts, and the distance between adjacent penetration through-holes in each part is less than the diameter of the penetration through-hole. To ensure that the glue can penetrate sufficiently between the cover plate and the static reed.

[0012] Further improvement: A first glue-filling space for filling glue is formed between the inner side surface of the plate-shaped base portion of each static reed and the base and the cover shell. A glue-injection through-hole is provided in the middle of the plate-shaped base portion. A glue storage area is provided on the base corresponding to the glue-injection through-hole. The glue storage area communicates with the first glue-filling space. The cover shell is provided with a plurality of first exhaust grooves corresponding to the plate-shaped base portion. Each first exhaust groove communicates with the first glue-filling space. In this way, the connection between the base and the cover shell covered by the static reed can also be filled with glue and sealed by plastic encapsulation to further improve the performance of the relay.

[0013] Furthermore, a first glue-pointing area and a second glue-pointing area are respectively formed between the two sides of each plate-shaped base portion and the base and the cover shell. Both the first glue-pointing area and the second glue-pointing area communicate with the first glue-filling space. This can better ensure that the first glue-filling space is filled with glue.

[0014] For further improvement, two said relief through holes are provided on the base, and the two static reed pieces are fixedly connected to the base in a symmetric structure. The static contact fixing parts on each static reed piece extend between the base and the cover through one of the said relief through holes; the lower end face of the cover is parallel to its upper end face. When the cover is fixedly connected to the base, the plate-shaped base parts of each static reed piece are parallel to the upper end face of the cover, and the distance between the lower end face of the plate-shaped base part of each static reed piece and the upper end face of the cover is less than the distance between the lower end face and the upper end face of the cover. On the one hand, this can make the structural arrangement more reasonable; on the other hand, it can better protect the static reed pieces and prevent the plate-shaped base parts of the two static reed pieces from touching the conductor to form conduction.

[0015] As an improvement, one end of the base is fixedly connected with an interface housing, an interface groove is provided on the interface housing, four conductive pins are embedded in the base, and the conductive pins are electrically insulated from each other. One end of each conductive pin is provided with a plugging part, the four plugging parts are parallel to each other, and four matching through holes are provided at the bottom of the interface groove. Each said plugging part passes through a matching through hole and is inserted into the interface groove, and the other end of each conductive pin is electrically connected to the static reed piece or the coil connection end. In this way, a control interface or a management interface can be formed to facilitate the connection of external cables.

[0016] Furthermore, two positioning protrusions extend outward from one side end face of the base, and the four conductive pins are located between the two positioning protrusions. The interface housing is provided with a positioning hole on both sides of the interface groove. Each positioning protrusion is provided with a hook, each positioning protrusion is inserted into a positioning hole, and the hook of the positioning protrusion is stuck on the outer side face of the interface housing. The interface housing is provided with a limiting end face near the base, and the limiting end face cooperates with the side end face of the base for limiting. In this way, the interface housing can be conveniently positioned and fixedly connected to the base, and the assembly performance is also good.

[0017] Furthermore, the conductive pin electrically connected to the static reed piece is the first conductive pin. Two first fitting grooves are provided on the outer side face of the base, and each first conductive pin is fitted in one of the first fitting grooves. The first fitting groove restricts the first conductive pin from moving along the plugging direction of the plugging part; the first conductive pin is provided with a first conductive clamping part perpendicular to the plugging part, and the plate-shaped base part of the static reed piece is provided with a clamping through hole, and the first conductive clamping part is in contact and cooperation with the clamping through hole;

[0018] The conductive pin electrically connected to one end of the coil is the second conductive pin. There are two second fitting grooves provided on the inner side surface of the base. Each second conductive pin is fitted in one second fitting groove, and the second fitting groove restricts the movement of the second conductive pin along the insertion direction of the insertion portion. Each second conductive pin is provided with a second conductive clamping portion perpendicular to the insertion portion. A conductive clamping groove is provided on the second conductive clamping portion. Two coil enameled wire connecting feet are fixedly connected to the coil bobbin. Each coil enameled wire connecting foot is provided with an enameled wire winding portion and a clamping and mating portion. The enameled wire winding portion is wound with one end of the coil enameled wire to form an electrical connection. The clamping and mating portion of each coil enameled wire connecting foot is snapped into the conductive clamping groove on one of the second conductive clamping portions to form an electrical connection.

[0019] In this way, by respectively fitting the first conductive pin and the second conductive pin on the inner and outer side surfaces of the base, a high-voltage and low-voltage insulation isolation is formed. On the other hand, the fitting grooves of the base have a limiting effect on the first conductive pin and the second conductive pin, preventing the loosening of the first conductive pin and the second conductive pin and improving the reliability of the plug-in connection. In addition, the electrical connection reliability between the first conductive pin and the static contact spring can be improved, and the electrical connection reliability between the second conductive pin and the coil enameled wire connecting foot can be improved.

[0020] Furthermore, a U-shaped groove is provided at the end of the first conductive clamping portion. The first conductive clamping portion forms an interference fit with the two inner side surfaces of the clamping through hole by using its two outer side surfaces. Chip removal grooves are provided on both lower sides of the first conductive clamping portion. To ensure that the first conductive clamping portion can be assembled in place and ensure the electrical connection performance between the first conductive pin and the static contact spring.

[0021] For further improvement, a second glue filling space for filling glue is formed between one side of the interface housing and the cover housing. The interface housing is provided with glue dispensing storage grooves on both sides of the interface groove, and each glue dispensing storage groove communicates with the second glue filling space. The cover housing is provided with a plurality of second exhaust grooves corresponding to one side of the interface housing, and each second exhaust groove communicates with the second glue filling space. To improve the overall sealing performance.

[0022] For further improvement, each of the insertion portions is parallel to the axial direction of the coil, and the inner surface of the fitting through hole contacts the inserted insertion portion to provide auxiliary support for the insertion portion. So that the insertion portion has good support performance and is convenient for layout.

[0023] As another improvement, the relay further includes four conductive lead-out components. Each conductive lead-out component is provided with a clamping portion and a welding portion. The clamping portion and the welding portion are connected by a bending portion. The welding portion is provided with a welding end face. The conductive lead-out components are electrically insulated from each other. Four conductive pins are embedded in the base. One end of each conductive pin is provided with an electrical connection portion. The four electrical connection portions are parallel to each other and are located at one end of the base. The conductive pins are electrically insulated from each other. The cover shell is provided with a relief through hole near each of the electrical connection portions. The clamping portion of each conductive lead-out component passes through the relief through hole to clamp an electrical connection portion to achieve electrical connection. The welding portion of each conductive lead-out component is located outside the cover shell. The welding end faces of all the welding portions of the conductive lead-out components are in the same plane. When the electromagnetic relay is installed, the welding portion is welded to the external circuit board patch pad by using the welding end face. The other ends of two of the conductive pins are electrically connected to two of the static reed pieces respectively, and the other ends of the other two conductive pins are electrically connected to both ends of the coil respectively. In this way, the electromagnetic relay can be directly surface-mounted on the circuit board and is convenient for realizing automated assembly operations.

[0024] For further improvement, each of the conductive lead-out components is U-shaped. Two clamping portions and one welding portion are formed on each conductive lead-out component. The two clamping portions are perpendicular to the welding portion respectively. The cover shell is provided with two relief through holes near each of the electrical connection portions. The two clamping portions on each conductive lead-out component pass through the two relief through holes respectively and are clamped on an electrical connection portion at the same time. As long as one of the two clamping portions can be reliably electrically connected to the electrical connection portion, it can ensure normal operation, so as to improve the electrical connection reliability. In addition, by clamping the two clamping portions on an electrical connection portion at the same time, the connection stability can also be improved.

[0025] For further improvement, shoulders are provided on the clamping portions of each conductive lead-out component. The shoulders cooperate with the inner side surface of the cover shell to prevent the clamping portions of the conductive lead-out components from disengaging from the electrical connection portions on the conductive pins. To form an anti-withdrawal structure and prevent the conductive lead-out components from falling off.

[0026] For further improvement, clamping grooves are provided on the clamping portions of each conductive lead-out component. The clamping portion is clamped on the electrical connection portion by using the clamping groove and forms an interference fit. To further improve the electrical connection reliability.

[0027] For further improvement, protrusions are provided on the base between adjacent electrical connection portions. The inner side surface of the cover shell is provided with a mating groove corresponding to each protrusion. Each protrusion cooperates with the mating groove to increase the creepage distance and electrical clearance between adjacent conductive lead-out components; ensure reliable electrical insulation between the high-voltage circuit and the low-voltage circuit, and further improve the use safety.

[0028] The welding parts of all the conductive lead-out parts are attached to the same outer side surface of the cover shell, so that the welding end faces of the welding parts of all the conductive lead-out parts are in the same plane. This facilitates assembly and positioning to ensure that all the welding end faces are in the same plane.

[0029] For further improvement, an installation part extending outward is provided on the side of the cover shell far from its relief through-hole. The installation part is parallel to the welding end face. An installation through-hole is provided on the installation part, and a metal ring is embedded on the inner wall of the installation through-hole. The metal ring is integrally connected with the cover shell. Two positioning columns are provided on the outer side surface of the cover shell where the relief through-hole is provided. The two positioning columns are parallel to the axial direction of the installation through-hole. The electromagnetic relay is positioned with the external circuit board by using the two positioning columns. This not only facilitates the installation and fixation of the electromagnetic relay, but also facilitates the positioning of the electromagnetic relay and the external circuit board.

[0030] In the present invention, since each static reed includes a plate-shaped base part, a part on one side of the plate-shaped base part extends outward and is bent to form a static contact fixing part, and a static contact is fixedly provided on the static contact fixing part. A relief through-hole is provided on the base. The two static reeds are respectively fixedly connected to the outer side surface of the base at intervals by using the plate-shaped base parts. Each of the static contact fixing parts extends into the space between the base and the cover shell through the relief through-hole. In this way, the main body of each static reed is outside, and it is easy to transfer heat to the outside in the form of heat radiation and heat convection, greatly improving the heat dissipation effect of the static reed. For a relay with a relatively large power, the performance can be improved well. In addition, there is no need to integrally inject the static reed and the base. On the one hand, the static reed and the static contact can be better protected, and on the other hand, the injection molding process of the base can be greatly simplified, effectively reducing the manufacturing cost and prolonging the service life of the relay.

[0031] On the other hand, since the main body of the static reed is outside the base, the electrical clearance and creepage distance between the static reed and the coil can also be increased, preventing the mutual influence between high and low voltages. The present invention is also convenient for realizing automatic assembly. Description of the Drawings

[0032] Figure 1 is the top perspective view of the first embodiment of the present invention;

[0033] Figure 2 is the top perspective view of the first embodiment of the present invention with the cover shell hidden;

[0034] Figure 3 is the bottom perspective view of the first embodiment of the present invention;

[0035] Figure 4 is the bottom view of the first embodiment of the present invention;

[0036] Figure 5 is Figure 4 the A-A cross-sectional view of

[0037] Figure 6Yes Figure 4 Sectional view B-B of

[0038] Figure 7 Yes Figure 4 Sectional view C-C of

[0039] Figure 8 Exploded perspective view of the first embodiment of the present invention

[0040] Figure 9 Yes Figure 8 Enlarged view at D of

[0041] Figure 10 Top-down perspective view of the base of the first embodiment of the present invention

[0042] Figure 11 Bottom-up perspective view of the base of the first embodiment of the present invention

[0043] Figure 12 Perspective view of the static spring piece of the first embodiment of the present invention

[0044] Figure 13 Perspective view of the rubber block of the first embodiment of the present invention

[0045] Figure 14 Perspective view of the cover body of the first embodiment of the present invention

[0046] Figure 15 Perspective view of the first conductive pin of the first embodiment of the present invention

[0047] Figure 16 Perspective view of the second conductive pin of the first embodiment of the present invention

[0048] Figure 17 Perspective view of the interface housing of the first embodiment of the present invention

[0049] Figure 18 Perspective view of the interface housing of the first embodiment of the present invention from another angle

[0050] Figure 19 Top-down perspective view of the second embodiment of the present invention

[0051] Figure 20 Bottom-up perspective view of the second embodiment of the present invention

[0052] Figure 21 Yes Figure 20 View E of

[0053] Figure 22 Yes Figure 21 Sectional view F-F of

[0054] Figure 23 Yes Figure 22Enlarged view at position G;

[0055] Figure 24 is the bottom view of the second embodiment of the present invention;

[0056] Figure 25 is Figure 24 the sectional view taken along line H-H;

[0057] Figure 26 is the perspective view of the conductive lead-out member of the second embodiment of the present invention;

[0058] Figure 27 is the perspective view of the connection of the conductive lead-out member and the first conductive pin of the second embodiment of the present invention;

[0059] Figure 28 is the perspective view of the connection of the conductive lead-out member and the second conductive pin of the second embodiment of the present invention;

[0060] Figure 29 is the top perspective view of the base of the second embodiment of the present invention;

[0061] Figure 30 is the bottom perspective view of the base of the second embodiment of the present invention. Detailed implementation manners

[0062] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific implementation manners.

[0063] Embodiment 1, Figures 1 to 18 As shown, an electromagnetic relay includes a base 1, a cover 2, a coil 3, a moving reed 4 and two static reeds 5. The cover 2 is snap-connected and fixedly connected to the base 1. Three snap-limiting portions 21 are provided at the lower part inside the cover 2, and the three snap-limiting portions 21 clamp the base 1. The coil 3 is wound around a coil bobbin 31, and the coil bobbin 31 is fixedly connected to the base 1. The coil 3, the coil bobbin 31 and the moving reed 4 are located between the base 1 and the cover 2. An iron core 32 is installed in the central hole of the coil bobbin 31. A yoke 33 is fixedly connected to the coil bobbin 31. The yoke 33 is L-shaped. One end of the yoke 33 is fixedly connected to one side of the coil bobbin 31, and the other end of the yoke 33 is parallel to the coil 3. Two first snap-fixing feet 331 are provided at one end of the yoke 33. Two second snap-fixing feet 311 are provided at the lower part of the other side of the coil bobbin 31. Two first snap-fixing holes 11 and two second snap-fixing holes 12 are respectively provided at corresponding positions on the base 1. The two first snap-fixing feet 331 are respectively matched with the two first snap-fixing holes 11, and the two second snap-fixing feet 311 are respectively matched with the two second snap-fixing holes 12, so that the coil bobbin 31 and the base 1 are fixedly connected.

[0064] The moving reed 4 is bent along the middle part. One end of the moving reed 4 is fixedly connected to the other end of the yoke 33. The other end of the moving reed 4 is fixedly connected with an armature 41. Two moving contacts 42 are also provided at the other end of the moving reed 4. Specifically, a conductive plate 43 is first fixedly connected to the other end of the moving reed 4, and the two moving contacts 42 are arranged on the conductive plate 43. The armature 41 corresponds to one end of the iron core 32, and the other end of the iron core 32 is connected to the yoke 33. Each static reed 5 includes a plate-shaped base 51. A part of one side of the plate-shaped base 51 extends outward and is bent to form a static contact fixing part 52. The static contact fixing part 52 is perpendicular to the plate-shaped base 51 and is fixedly provided with a static contact 521. Two relief through holes 13 are provided on the base 1. The two static reeds 5 are symmetrically structured and are respectively fixedly connected to the outer side surface of the base 1 at intervals by using their plate-shaped bases 51. Each static contact fixing part 52 extends into the space between the base 1 and the cover 2 through one of the relief through holes 13, and each static contact 521 corresponds to one moving contact 42 on the moving reed 4. A connecting part is formed by a part of the plate-shaped base 51 of each static reed 5 protruding out of the cover 2. This connecting part is fixedly connected to the load connection terminal by a connecting screw, and a connection through hole 511 for the connecting screw to pass through is provided on this connecting part. The lower end surface of the cover 2 is parallel to its upper end surface. When the cover 2 is fixedly connected to the base 1, the plate-shaped base 51 of each static reed 5 is parallel to the upper end surface of the cover 2, and the distance between the lower end surface of the plate-shaped base 51 of each static reed 5 and the upper end surface of the cover 2 is less than the distance between the lower end surface and the upper end surface of the cover 2. In this way, it can better protect the static reeds 5 and prevent the plate-shaped bases 51 of the two static reeds 5 from touching the conductor to form conduction.

[0065] A part of three sides of the plate-shaped base 51 of each static reed 5 extends outward and is bent to form a riveting fixing part 52. The base 1 is provided with three corresponding riveting holes 14 for each static reed 5. Each riveting fixing part 52 is fitted in one of the riveting holes 14 so that the plate-shaped base 51 is fixedly connected to the outer side surface of the base 1. This can facilitate assembly and improve assembly efficiency.

[0066] The base 1 is provided with an assembly area 15 on one side close to the other end of the moving reed 4. A rubber block 6 is fixedly connected to the assembly area 15. The rubber block 6 restricts the moving distance of the other end of the moving reed 4 when it rebounds and returns to its original position and provides a buffering effect. It can better reduce noise.

[0067] Further in combination with Figure 10 、 Figure 11 、 Figure 13As shown, the rubber block 6 includes a square-shaped main body 61. On both sides of the square-shaped main body 61, a positioning convex part 62 extends outward. The rubber block 6 is positioned with the assembly area 15 through the upper and lower side surfaces of the square-shaped main body 61 and the two positioning convex parts 62. The front side surface of the square-shaped main body 61 protrudes from the assembly area 15 and faces the other end of the moving reed 4.

[0068] The specific structure of the assembly area 15 is as follows: A bottom part 1d is provided on the base 1. A side part 1e extends upward from one side of the bottom part 1d. The assembly area 15 includes a groove 150 provided inside the side part 1e. The groove 150 extends downward and penetrates a part of the bottom part 1d. A clamping groove 151 is provided on each of the two inner side surfaces of the groove 150. A lower limit protrusion 16 is provided at the lower part of the groove 150 on one side of the penetrated bottom part 1d. When the rubber block 6 is installed in the assembly area 15, the lower side surface of the square-shaped main body 61 abuts against the lower limit protrusion 16, the upper side surface of the square-shaped main body 61 abuts against the upper side of the groove 150, the front side surface of the square-shaped main body 61 protrudes from the inner side surface of the side part 1e, and the two positioning convex parts 62 are respectively matched with the two clamping grooves 151.

[0069] The two positioning convex parts 62 are also respectively fixedly tightened with the two clamping grooves 151 by glue.

[0070] When the cover 2 is fixedly connected to the base 1, a clamping and limiting part 21 on the cover 2 also clamps the lower side surface of the square-shaped main body 61 of the rubber block 6. The lower limit protrusion 16 and the clamping and limiting part 21 jointly prevent the rubber block 6 from detaching from the base 1.

[0071] Two relief through-holes 13 are covered with a cover plate 7. The cover plate 7 also covers a part of each static reed 5. A first glue-pointing groove 71 is provided on the cover plate 7. A plurality of penetration through-holes 72 are provided on the first glue-pointing groove 71. Each penetration through-hole 72 communicates with the surface of one static reed 5. Through the penetration through-holes 72, glue can conveniently flow into the space between the outer surface of the static reed 5 and the inner surface of the cover plate 7 to improve the plastic sealing effect.

[0072] Preferably, the penetration through-holes 72 are round holes. The plurality of penetration through-holes 72 are divided into two parts. The distance between adjacent penetration through-holes 72 in each part is less than the diameter of the penetration through-holes 72. Four hooks 73 are provided on the cover plate 7. Two of the hooks 73 are clamped on the base 1, and the other two hooks 73 are respectively clamped on the plate-shaped base parts 51 of the two static reeds 5, so that the cover plate 7 is fixedly connected to the base 1.

[0073] When the cover plate 7 is fixedly connected to the base 1, a second glue application groove 74 is formed between a partial edge of the cover plate 7 and the base. The second glue application groove 74 communicates with the first glue application groove 71. Glue is applied through the second glue application groove 74 and the first glue application groove 71 to encapsulate the peripheries of the two relief through holes 13, so as to better protect the moving contact 42 of the moving reed 4 and the static contact 521 on the static reed 5 from oxidation corrosion by external gas and improve the service life.

[0074] A first glue filling space 50 for filling glue is formed between the inner side surface of the plate-shaped base portion 51 of each static reed 5, the base 1 and the housing 2. A glue injection through hole 54 is provided in the middle of the plate-shaped base portion 51. A glue storage area 17 is provided on the base 1 corresponding to the glue injection through hole 54. The glue storage area 17 communicates with the first glue filling space 50; a plurality of first exhaust grooves 22 are provided on the housing 2 corresponding to the plate-shaped base portion 51. Each first exhaust groove 22 communicates with the first glue filling space 50. The accumulation of gas in the first glue filling space 50 is avoided through the plurality of first exhaust grooves 22, and the gas is prevented from hindering the flow of the glue.

[0075] The base 1 is respectively provided with a first glue application area 18 and a second glue application area 19 on both sides of each plate-shaped base portion 51. Both the first glue application area 18 and the second glue application area 19 communicate with the first glue filling space 50.

[0076] By injecting glue into the glue injection through hole 54, the first glue application area 18 and the second glue application area 19, the glue can be quickly filled into the first glue filling space 50 for encapsulation. Among them, the glue entering from the glue injection through hole 54 first reaches the glue storage area 17, and then flows from the glue storage area 17 into the first glue filling space 50.

[0077] One end of the base 1 is fixedly connected with an interface housing 8. An interface groove 81 is provided on the interface housing 8. Two positioning protrusions 10 extend outward from one side end surface 1a of the base 1. A hook 101 is provided on each positioning protrusion 10. One positioning hole 82 is provided on both sides of the interface groove 81 of the interface housing 8. Each positioning protrusion 10 is inserted into a positioning hole 82, and the hook 101 of the positioning protrusion 10 is stuck on the outer side surface of the interface housing 8. A limiting end surface 8a is provided on the interface housing 8 close to the base 1. The limiting end surface 8a and the side end surface 1a of the base 1 cooperate with each other for limiting.

[0078] A relief groove 102 is provided on each positioning protrusion 10 near the hook 101. The relief groove 102 provides deformation relief for the hook 101 during the assembly of the hook 101. To facilitate the assembly.

[0079] Four conductive pins 9 are embedded in the base 1, and the conductive pins 9 are electrically insulated from each other. The four conductive pins 9 are located between two positioning protrusions 10. One end of each conductive pin 9 is provided with a plugging portion 90. The four plugging portions 90 are parallel to each other and parallel to the axial direction of the coil 3. Four mating through holes 811 are provided at the bottom of the interface groove 81. Each of the plugging portions 90 passes through a mating through hole 811 and is inserted into the interface groove 81. The inner surface of the mating through hole 811 contacts the inserted plugging portion 90 to provide auxiliary support for the plugging portion 90. The other end of each conductive pin 9 is electrically connected to the static reed 5 or the connection end of the coil 3.

[0080] The conductive pin 9 electrically connected to the static reed 5 is the first conductive pin 91. Two first fitting grooves 1b are provided on the outer side surface of the base 1. Each first conductive pin 91 is fitted in a first fitting groove 1b. The first fitting groove 1b restricts the movement of the first conductive pin 91 along the plugging direction of the plugging portion 90. One end of each first conductive pin 91 is provided with a first conductive clamping portion 911. The first conductive clamping portion 911 is perpendicular to the plugging portion 90. A clamping through hole 55 is provided on the plate-shaped base portion 51 of the static reed 5. The first conductive clamping portion 911 is in contact and cooperation with the clamping through hole 55.

[0081] A U-shaped groove 912 is provided at the end of the first conductive clamping portion 911. The first conductive clamping portion 911 forms an interference fit with the two inner side surfaces of the clamping through hole 55 by using its two outer side surfaces. In this way, a better electrical connection effect can be formed. The U-shaped groove 912 can provide a space for the deformation of the first conductive clamping portion 911, which is convenient for assembly.

[0082] Chip removal grooves 913 are provided on both lower sides of the first conductive clamping portion 911. During assembly, the metal chips generated by the interference fit between the static reed 5 and the first conductive clamping portion 911 can be accumulated at the chip removal grooves 913, avoiding incomplete assembly or rebound due to the accumulation of metal chips here after assembly.

[0083] The conductive pin 9 electrically connected to one end of the coil 3 is the second conductive pin 92. The two second conductive pins 92 are located between the two first conductive pins 91 and are fitted in the inner side surface of the base 1. Two second fitting grooves 1c are provided on the inner side surface of the base 1. Each second conductive pin 92 is fitted in a second fitting groove 1c. The second fitting groove 1c restricts the movement of the second conductive pin 92 along the plugging direction of the plugging portion 90.

[0084] Each second conductive pin 92 is provided with a second conductive clamping portion 921. The second conductive clamping portion 921 is perpendicular to the insertion portion 90. A conductive clamping groove 922 is provided on the second conductive clamping portion 921. Two coil enameled wire connection pins 34 are fixedly connected to the coil bobbin 31. Each coil enameled wire connection pin 34 is provided with an enameled wire winding portion 341 and a clamping and mating portion 342. The enameled wire winding portion 341 is wound with one end of the enameled wire of the coil 3 to form an electrical connection. The clamping and mating portion 342 of each coil enameled wire connection pin 34 is snapped into the conductive clamping groove 922 on one of the second conductive clamping portions to form an electrical connection. The two outer sides of the clamping and mating portion 342 of the coil enameled wire connection pin 34 are in contact and cooperation with the two inner sides of the conductive clamping groove 922.

[0085] When the cover 2 is fixedly connected to the base 1, a second glue filling space 80 for filling glue is formed between one side of the interface housing 8 and the cover 2. The interface housing 8 is respectively provided with glue dispensing storage grooves 83 on both sides of the interface groove 81. Each glue dispensing storage groove 83 communicates with the second glue filling space 80. The cover 2 is provided with a plurality of second exhaust grooves 23 corresponding to one side of the interface housing 8. Each second exhaust groove 23 communicates with the second glue filling space 80. Glue is injected through the two glue dispensing storage grooves 83 to fill the second glue filling space 80 to achieve a sealing effect. The accumulation of gas in the second glue filling space 80 is avoided through the plurality of second exhaust grooves 23 to prevent the gas from hindering the flow of the glue.

[0086] A clamping through hole 84 that cooperates with an external plug is provided on one inner side of the interface groove 81 on the interface housing 8. When the external plug is inserted into the interface groove 81, the clamping through hole 84 cooperates with the clamping protrusion on the external plug to prevent the external plug from disengaging from the interface groove 81.

[0087] When this embodiment is in use, the connecting portion of the plate-shaped base 51 of each static reed 5 extending out of the cover 2 is fixedly connected to a load connection terminal through a connecting screw. The interface groove 81 is plugged with an external plug. The control power supply is introduced through the external plug and the coil 3 is energized through the two second conductive pins 92. The generated magnetic force causes the armature 41 to be attracted to one end of the iron core 32. The two static contact points 521 are simultaneously engaged with the two moving contact points 42 of the moving reed 4. The two static reeds 5 are electrically connected to each other. The state of the two static reeds 5 being electrically connected to each other is then transmitted to the outside through the two first conductive pins 91 and the external plug. When the external control power supply is disconnected, the magnetic force disappears. The elastic force of the moving reed causes the armature 41 to disengage from one end of the iron core 32. The two static contact points 521 are simultaneously disengaged from the two moving contact points 42 of the moving reed 4. The two static reeds 5 are electrically disconnected from each other. The state of the two static reeds 5 being electrically disconnected from each other is also transmitted to the outside through the two first conductive pins 91 and the external plug.

[0088] Embodiment Two Figures 19 to 30As shown in the figure, an electromagnetic relay includes a base 1, a cover 2, a coil 3, a moving reed 4 and two static reeds 5. The cover 2 is fixedly connected to the base 1. The coil 3 is wound around a coil bobbin 31, and the coil bobbin 31 is fixedly connected to the base 1. The coil bobbin 31 is located between the base 1 and the cover 2. An iron core 32 is installed in the central hole of the coil bobbin 31. A yoke 33 is fixedly connected to the coil bobbin 31. The yoke 33 is L-shaped. One end of the yoke 33 is fixedly connected to one side of the coil bobbin 31, and the other end of the yoke 33 is parallel to the axial direction of the coil 3. The moving reed 4 is bent along the middle part. One end of the moving reed 4 is fixedly connected to the other end of the yoke 33. An armature 41 is fixedly connected to the other end of the moving reed 4. Two moving contacts 42 are also provided at the other end of the moving reed 4.

[0089] Each static reed 5 includes a plate-shaped base 51. A part of one side of the plate-shaped base 51 extends outward and is bent to form a static contact fixing part 52. The static contact fixing part 52 is perpendicular to the plate-shaped base 51 and a static contact 521 is fixedly provided thereon. The two static reeds 5 are of a symmetrical structure and are respectively fixedly connected to the outer side surface of the base 1 at intervals by using their plate-shaped bases 51. Each of the static contact fixing parts 52 extends into the space between the base 1 and the cover 2. Each of the static contacts 521 corresponds to one of the moving contacts 42 on the moving reed 4. A part of the plate-shaped base 51 is located outside the cover 2 and forms a connecting part connected to the load connection terminal. An installation opening 511 is provided on the connecting part.

[0090] Further referring to Figure 26 As shown in the figure, this embodiment further includes four conductive lead-out parts 6. The conductive lead-out parts 6 are electrically insulated from each other. The conductive lead-out parts 6 are U-shaped. Two clamping parts 61 and a welding part 62 are provided on the conductive lead-out parts 6. The two clamping parts 61 are both perpendicular to the welding part 62. The two clamping parts 61 and the welding part 62 are connected by a bending part 63. A welding end face is provided on the welding part 62. The welding end face is the outer side surface of the welding part 62.

[0091] Four conductive pins 7 are embedded in the base 1. The conductive pins 7 are electrically insulated from each other. One end of each conductive pin 7 is provided with an electrical connection part 70. The four electrical connection parts 70 are parallel to each other and are located at one end of the base 1. The cover 2 is provided with two relief through holes 21 near each of the electrical connection parts 70. The two clamping parts 61 on each conductive lead-out part 6 respectively pass through the two relief through holes 21 and are clamped on one of the electrical connection parts 70 to achieve electrical connection. The welding part 62 of each conductive lead-out part 6 is located outside the cover 2. The welding end faces of the welding parts 62 of all the conductive lead-out parts 6 are in the same plane. When the electromagnetic relay is installed, the welding part 62 is welded to the circuit board patch pad by using the welding end face. The other end of each conductive pin 7 is electrically connected to the static reed 5 or the connection end of the coil 3.

[0092] Each of the clamping portions 61 on the conductive lead-out member 6 is provided with a clamping groove 611. The clamping portion 61 is clamped on the electrical connection portion 70 by means of the clamping groove 611 and forms an interference fit to ensure the reliability of the electrical connection.

[0093] Each of the clamping portions 61 on the conductive lead-out member 6 is provided with two shoulders 612. The shoulders 612 cooperate with the inner side surface of the housing 2 to prevent the clamping portion 61 of the conductive lead-out member 6 from detaching from the electrical connection portion 70 on the conductive pin 7.

[0094] On the base 1 between adjacent electrical connection portions 70, there are provided convex portions 1a. Corresponding to each convex portion 1a on the inner side surface of the housing 2, there is provided a mating groove 2a. Each convex portion 1a cooperates with the mating groove 2a to increase the creepage distance and electrical clearance between adjacent conductive lead-out members 6, ensuring reliable electrical insulation between the high-voltage circuit and the low-voltage circuit and further improving the use safety.

[0095] On the side of the housing 2 away from its relief through-hole 21, there are provided two outwardly extending mounting portions 22. The mounting portions 22 are parallel to the welding end face. The mounting portions 22 are provided with mounting through-holes 221. A metal ring 222 is embedded on the inner wall of the mounting through-hole 221. The metal ring 222 and the housing 2 are integrally formed by injection molding. On the outer side surface of the housing 2 provided with the relief through-hole 21, there are provided two positioning posts 23. The two positioning posts 23 are parallel to the axial direction of the mounting through-hole 221. The electromagnetic relay is positioned with the circuit board by means of the two positioning posts 23. The circuit board may be provided with two positioning through-holes. The two positioning posts 23 cooperate with the two positioning through-holes on the circuit board to facilitate mutual positioning with the circuit board and ensure the accuracy of the welding position.

[0096] The inner side surfaces of the welding portions 62 of all the conductive lead-out members 6 are all attached to the same outer side surface of the housing 2, such that the welding end faces of the welding portions 62 of all the conductive lead-out members 6 are in the same plane.

[0097] There are two static contact springs 5 and four conductive pins 7. Two of the conductive pins 7 are respectively electrically connected to the two static contact springs 5, and the other two conductive pins 7 are respectively electrically connected to both ends of the coil 3.

[0098] The conductive pins 7 electrically connected to the static contact springs 5 are the first conductive pins 71. On the outer side surface of the base 1, there are provided two first fitting grooves 1b. Each first conductive pin 71 is fitted in a first fitting groove 1b. On the first conductive pin 71, there is provided a first conductive clamping portion 711. The first conductive clamping portion 711 is perpendicular to the electrical connection portion 70. On the plate-shaped base portion 51 of the static contact spring 5, there is provided a clamping through-hole 53. The first conductive clamping portion 711 is in contact and cooperation with the clamping through-hole 53 to achieve electrical connection.

[0099] The conductive pin 7 electrically connected to one end of the coil 3 is the second conductive pin 72. Two second fitting grooves 1c are provided on the inner side surface of the base 1. Each second conductive pin 72 is fitted in a second fitting groove 1c. A second conductive clamping portion 721 is provided on the second conductive pin 72. The second conductive clamping portion 721 is perpendicular to the electrical connection portion 70. The second conductive clamping portion 721 is clamped with the pin of the coil 3 to form an electrical connection.

[0100] Figure 23 As further shown, the electrical connection portions 70 on the two first conductive pins 71 are in the middle position, and the electrical connection portions 70 on the two second conductive pins 72 are on both sides.

[0101] A plurality of first fitting protrusions 11b are provided on the inner side surface of the first fitting groove 1b. The first fitting protrusions 11b abut against the first conductive pin 71 to prevent the first conductive pin 71 from loosening; a second fitting protrusion 11c is provided on the inner side surface of the second fitting groove 1c. The second fitting protrusions 11c abut against the second conductive pin 72 to prevent the second conductive pin 72 from loosening.

[0102] When this embodiment is used, first, the entire relay is fixed by the two mounting portions 22 of the cover 2, and then positioned with the circuit board by the two positioning posts 23. The welding end surfaces on the four welding portions 62 are fitted with the corresponding patch pads on the circuit board and then welded. In this way, a control power supply can be input to the coil 3 through the circuit board, and then the working states of the two static reed pieces 3 can be collected through the circuit board.

[0103] The above are only two preferred embodiments of the present invention. Equivalent changes made by those skilled in the art according to the claims fall within the protection scope of this case.

Claims

1. An electromagnetic relay, comprising a base, a cover, a coil, a moving reed and two stationary reeds. The cover is fixedly connected to the base. The coil is wound around a coil bobbin, and the coil bobbin is fixedly connected to the base. The coil is located between the base and the cover. An iron core is installed in the central hole of the coil. A yoke is fixedly connected to the coil bobbin. The moving reed is bent along the middle part. One end of the moving reed is fixedly connected to the yoke, and the other end of the moving reed is fixedly connected with an armature. A plurality of moving contacts are also provided at the other end of the moving reed. The armature corresponds to one end of the iron core, and the other end of the iron core is connected to the yoke or connected to the yoke through a permanent magnet. It is characterized in that: Each stationary reed includes a plate-shaped base portion. A part on one side of the plate-shaped base portion extends outward and is bent to form a stationary contact fixing portion. A stationary contact is fixedly provided on the stationary contact fixing portion. A relief through hole is provided on the base; the two stationary reeds are respectively fixedly connected to the outer side surface of the base at intervals by using the plate-shaped base portions. Each of the stationary contact fixing portions extends into the space between the base and the cover through the relief through hole. Each of the stationary contacts corresponds to one of the moving contacts on the moving reed; a connecting portion is formed by the part of the plate-shaped base portion of each stationary reed protruding outside the cover. The stationary contact fixing portion on each stationary reed is perpendicular to its plate-shaped base portion. Two of the relief through holes are provided on the base. The two stationary reeds are fixedly connected to the base in a symmetric structure. The stationary contact fixing portion of each stationary reed extends into the space between the base and the cover through one of the relief through holes; the lower end surface of the cover is parallel to its upper end surface. When the cover is fixedly connected to the base, the plate-shaped base portion of each stationary reed is parallel to the upper end surface of the cover, and the distance between the lower end surface of the plate-shaped base portion of each stationary reed and the upper end surface of the cover is less than the distance between the lower end surface and the upper end surface of the cover.

2. An electromagnetic relay according to claim 1, It is characterized in that: A part of three side surfaces of the plate-shaped base portion of each stationary reed extends outward and is bent to form a riveting fixing portion. A plurality of corresponding riveting holes are provided on the base. Each riveting fixing portion is fitted in a riveting hole so that the plate-shaped base portion is fixedly connected to the outer side surface of the base.

3. An electromagnetic relay according to claim 1, It is characterized in that: An assembly area is provided on one side of the base close to the other end of the moving reed. A rubber block is fixedly connected to the assembly area. The rubber block limits the moving distance of the other end of the moving reed when it rebounds and returns to its original position and provides a buffering effect.

4. An electromagnetic relay according to claim 3, It is characterized in that: The rubber block includes a square-shaped main body. A positioning convex portion extends outward from the rear part of the left and right sides of the square-shaped main body. The rubber block is positioned with the assembly area through the upper and lower side surfaces of the square-shaped main body and the two positioning convex portions. The front side surface of the square-shaped main body protrudes from the assembly area and faces the other end of the moving reed. The base is provided with a bottom, and a side portion extends upward from one side of the bottom. The assembly area includes a groove provided on the inner side of the side portion. The groove extends downward and penetrates a part of the bottom. A card slot is provided on each of the two inner side surfaces of the groove. The groove is provided with a lower limit projection at the lower part of the penetrated bottom side. When the rubber block is installed in the assembly area, the lower side surface of the square-shaped main body abuts against the lower limit projection, the upper side surface of the square-shaped main body abuts against the upper side of the groove, the front side surface of the square-shaped main body protrudes from the inner side surface of the side portion, and the two positioning protrusions are respectively matched with the two card slots.

5. An electromagnetic relay according to claim 1, characterized in that: A cover plate is covered on the relief through hole. The cover plate is fixedly connected to the base, and the cover plate also covers a part of each static reed; a first glue-pointing groove is provided on the cover plate, and a plurality of penetration through holes are provided on the first glue-pointing groove. Each penetration through hole communicates with the surface of one static reed; a second glue-pointing groove is formed between a part of the edge of the cover plate and the base. The second glue-pointing groove communicates with the first glue-pointing groove, and glue is applied through the second glue-pointing groove and the first glue-pointing groove to seal the periphery of the relief through hole; The penetration through holes are round holes, and the plurality of penetration through holes are divided into two parts. The distance between adjacent penetration through holes in each part is less than the diameter of the penetration through hole.

6. An electromagnetic relay according to claim 1, characterized in that: A first glue-filling space for filling glue is formed between the inner side surface of the plate-shaped base of each static reed and the base and the cover shell. A glue-injection through hole is provided in the middle of the plate-shaped base. A glue storage area is provided on the base corresponding to the glue-injection through hole. The glue storage area communicates with the first glue-filling space; a plurality of first exhaust grooves are provided on the cover shell corresponding to the plate-shaped base. Each first exhaust groove communicates with the first glue-filling space; A first glue-pointing area and a second glue-pointing area are respectively formed between the two sides of each plate-shaped base and the base and the cover shell. The first glue-pointing area and the second glue-pointing area both communicate with the first glue-filling space.

7. An electromagnetic relay according to any one of claims 1 to 6, characterized in that: One end of the base is fixedly connected with an interface housing. An interface groove is provided on the interface housing. Four conductive pins are embedded in the base. The conductive pins are electrically insulated from each other. One end of each conductive pin is provided with a plugging portion. The four plugging portions are parallel to each other. Four matching through holes are provided at the bottom of the interface groove. Each plugging portion passes through a matching through hole and is inserted into the interface groove. The inner surface of the matching through hole is in contact with the inserted plugging portion to assist in supporting the plugging portion. The other end of each conductive pin is electrically connected to a static reed or an end of a coil connection.

8. An electromagnetic relay according to claim 7, characterized in that: Two positioning protrusions extend outward from one side end surface of the base. The four conductive pins are located between the two positioning protrusions. A positioning hole is provided on each side of the interface groove of the interface housing. A hook is provided on each positioning protrusion. Each positioning protrusion is inserted into a positioning hole. The hook of the positioning protrusion is stuck on the outer side surface of the interface housing. A limiting end surface is provided on the interface housing close to the base side. The limiting end surface cooperates with one side end surface of the base for limiting.

9. An electromagnetic relay according to claim 7, Features: The conductive pin electrically connected to the static spring piece is a first conductive pin, and two first engaging grooves are provided on the outer side surface of the base, each first conductive pin is engaged in one first engaging groove, and the first engaging groove limits the first conductive pin from moving along the plugging direction of the plug-in portion; the first conductive pin is provided with a first conductive clamping portion, and the first conductive clamping portion is perpendicular to the plug-in portion, and a clamping through hole is provided on the plate-shaped base of the static spring piece, and the first conductive clamping portion contacts and cooperates with the clamping through hole; The conductive pin electrically connected to one end of the coil is a second conductive pin, and two second embedding grooves are provided on the inner side surface of the base, each second conductive pin is embedded in one second embedding groove, and the second embedding groove limits the second conductive pin from moving along the plugging direction of the plug-in portion; each second conductive pin is provided with a second conductive clamping portion, the second conductive clamping portion is perpendicular to the plug-in portion, and the second conductive clamping portion is provided with a conductive clamping groove, and two coil enameled wire connecting pins are fixedly connected to the coil skeleton, and each coil enameled wire connecting pin is provided with an enameled wire winding portion and a clamping matching portion, and the enameled wire winding portion is wound with one end of the coil enameled wire to form an electrical connection, and the clamping matching portion of each coil enameled wire connecting pin is clamped into a conductive clamping groove on the second conductive clamping portion to form an electrical connection; A U-shaped groove is provided at the end of the first conductive clamping part, and the first conductive clamping part forms an interference fit with the two inner sides of the clamping through hole using two outer sides; and chip removal grooves are provided at the lower parts of both sides of the first conductive clamping part.

10. An electromagnetic relay according to claim 7, Features: A second glue-filled space is formed between one side of the interface shell and the cover shell, and the interface shell is provided with glue dispensing storage grooves on both sides of the interface groove, and each glue dispensing storage groove is connected to the second glue-filled space; the cover shell is provided with a plurality of second exhaust grooves on one side corresponding to the interface shell, and each second exhaust groove is connected to the second glue-filled space.

11. An electromagnetic relay according to any one of claims 1 to 6, Features: It also includes four conductive lead-out parts, each of which is provided with a clamping part and a welding part, the clamping part and the welding part are connected by a bending part, a welding end face is provided on the welding part, and the conductive lead-out parts are electrically insulated from each other. Four conductive pins are embedded on the base, and an electrical connection part is provided at one end of each conductive pin. The four electrical connection parts are parallel to each other and are located at one end of the base, and the conductive pins are electrically insulated from each other. The cover shell is provided with a clearance through hole near each of the electrical connection parts, and the clamping part of each conductive lead-out part passes through the clearance through hole to clamp one of the electrical connection parts to achieve electrical connection. The welding part of each conductive lead-out part is outside the cover shell, and the welding end faces of all the conductive lead-out welding parts are on the same plane; when the electromagnetic relay is installed, the welding part is welded to the external circuit board patch pad using the welding end face; the other ends of two of the conductive pins are respectively electrically connected to the two static spring sheets, and the other ends of the other two conductive pins are respectively electrically connected to the two ends of the coil.

12. An electromagnetic relay according to claim 11, It is characterized in that: Each of the conductive lead-out members is U-shaped, and two clamping portions and one welding portion are formed on each conductive lead-out member, and the two clamping portions are perpendicular to the welding portion; two relief through holes are provided in the housing near each of the electrical connection portions, and the two clamping portions on each conductive lead-out member respectively pass through the two relief through holes and are simultaneously clamped on one of the electrical connection portions; A shoulder is provided on the clamping portion of each conductive lead-out member, and the shoulder cooperates with the inner side surface of the housing to prevent the clamping portion of the conductive lead-out member from disengaging from the electrical connection portion on the conductive lead.

13. An electromagnetic relay according to claim 11, It is characterized in that: A convex portion is provided on the base between adjacent electrical connection portions, and a mating groove is provided on the inner side surface of the housing corresponding to each convex portion. Each convex portion cooperates with the mating groove to increase the creepage distance and electrical clearance between adjacent conductive lead-out members; the welding portions of all conductive lead-out members are attached to the same outer side surface of the housing, so that the welding end faces of the welding portions of all conductive lead-out members are in the same plane.

14. An electromagnetic relay according to claim 11, It is characterized in that: An installation portion extending outward is provided on the housing on the side away from its relief through hole. The installation portion is parallel to the welding end face. An installation through hole is provided on the installation portion, and a metal ring is embedded on the inner wall of the installation through hole. The metal ring is integrally formed with the housing; two positioning posts are provided on the outer side surface of the housing where the relief through holes are provided, and the two positioning posts are parallel to the axial direction of the installation through hole. The electromagnetic relay is positioned with the external circuit board by using the two positioning posts; a card slot is provided on the clamping portion of each conductive lead-out member, and the clamping portion is clamped on the electrical connection portion by using the card slot and forms an interference fit.

Images