Electromagnetic relay

Abstract

The present invention discloses an electromagnetic relay, which includes a base assembly, a transmission member and an electromagnetic system. The electromagnetic system includes an elastic member, a yoke and an armature. The armature is connected to the transmission member and can drive the transmission member to drive the moving reed assembly of the base assembly. The elastic member is connected between the transmission member and the yoke. The elastic member includes a reaction spring piece, a U-shaped connecting piece and two U-shaped fixing pieces. The bottom end of the reaction spring piece is connected to the transmission member. The bottom end of the middle section of the U-shaped connecting piece is connected to the top end of the reaction spring piece. The two arm end portions of the U-shaped connecting piece are respectively vertically connected to one arm end portion of the U-shaped fixing pieces. The two U-shaped fixing pieces are symmetrically arranged with their openings facing each other. In the electromagnetic relay of the present invention, the reaction spring piece of the elastic member is connected to the transmission member to provide a reaction force for the transmission member. The U-shaped fixing pieces are used for clamping and fixing the yoke. The U-shaped connecting piece integrates the reaction spring piece and the U-shaped fixing pieces, which can provide a reaction force for the transmission member and can be directly inserted and positioned with the yoke, with accurate positioning and no deviation.

Description

Technical Field

[0001] The present invention relates to the technical field of low-voltage electrical appliances, and particularly relates to an electromagnetic relay. Background Art

[0002] Existing electromagnetic relays and electromagnetic systems have the following problems: 1. The armature of the electromagnetic system needs to be positioned using a shrapnel. Some manufacturers rivet or weld the shrapnel to the yoke, while others use the base for positioning. The former has a complex process and high cost, and the latter has inevitable positioning deviations due to the long dimension chain; 2. The connection between the coil insert of the electromagnetic system and the lead-out end is either processed integrally or in the form of riveting or welding the coil insert and the lead-out end. The former is not conducive to standardization and automation for different lead-out end structures, and the latter has a complex processing technology and high cost; 3. Currently, the electromagnetic systems of relays in this application category are all monostable, and continuous excitation is required to maintain the suction state, resulting in high power consumption and being not environmentally friendly; 4. The power-on indicator module is usually connected to the electromagnetic system and placed outside the housing. It is connected to the power-on indicator module through a conductor passing through the housing, but this will inevitably damage the integrity of the housing, and the product cannot be designed as an airtight product. Moreover, since the indicator module can only be assembled after being installed in the housing, the assembly is cumbersome. Summary of the Invention

[0003] The purpose of the present invention is to overcome the defects of the prior art and provide an electromagnetic relay that realizes direct plug-in positioning of the yoke and has accurate and deviation-free positioning of the yoke.

[0004] To achieve the above purpose, the present invention adopts the following technical solutions:

[0005] An electromagnetic relay includes a base assembly, a transmission member, and an electromagnetic system. The electromagnetic system includes an elastic member, a yoke, and an armature. The armature is connected to the transmission member and can drive the transmission member to further drive the moving contact spring assembly of the base assembly. The elastic member is connected between the transmission member and the yoke. The elastic member includes a counter-force shrapnel, a U-shaped connecting piece, and two U-shaped fixing pieces. The bottom end of the counter-force shrapnel is connected to the transmission member. The bottom end of the middle section of the U-shaped connecting piece is connected to the top end of the counter-force shrapnel. The two arm ends of the U-shaped connecting piece are respectively vertically connected to one arm end of the two U-shaped fixing pieces. The two U-shaped fixing pieces are symmetrically arranged with their openings facing each other, and the openings of the two U-shaped fixing pieces are used to clamp the two sides of the yoke.

[0006] Preferably, a pressing piece for restricting the armature is provided on the top end of the middle section of the U-shaped connecting piece.

[0007] Preferably, lower limiting pieces for clamping the yoke are provided at the bottom ends of the middle sections of the two U-shaped fixing pieces, and upper limiting pieces for restricting the yoke and the armature are provided at the top ends of the middle sections of the two U-shaped fixing pieces.

[0008] Preferably, the pressing piece is an L-shaped sheet structure with an opening facing away from the armature and being inclined; the lower limiting piece is an arc-shaped sheet, and the lower limiting pieces of the two U-shaped fixing pieces are symmetrically arranged with the convex parts facing each other and the concave openings facing away from each other, and the two lower limiting pieces cooperate to clamp the yoke iron.

[0009] Preferably, the upper limiting pieces of the two U-shaped fixing pieces are symmetrically arranged. The upper limiting piece includes a stop portion for positioning the yoke iron, a clamping portion for restricting the armature, and a pressing portion. The clamping portion is vertically arranged, the stop portion is horizontally arranged and is vertically connected between the top end of the U-shaped fixing piece and the bottom end of the clamping portion, and the pressing portion is connected to the top end of the clamping portion. The pressing portions of the two upper limiting pieces are symmetrically arranged with the convex parts facing each other and the concave openings facing away from each other.

[0010] Preferably, the electromagnetic system further includes a coil bobbin, an iron core, and a magnet. The iron core is installed on the coil bobbin. The magnet is connected between the bottom end of the iron core and one end of the yoke iron. The other end of the yoke iron is snap-connected to an elastic member. One end of the armature is swingably installed on the coil bobbin and corresponds to the top end of the iron core, and the other end of the armature passes through the elastic member and is connected to a transmission member.

[0011] Preferably, the electromagnetic system further includes a coil bobbin, an iron core, and a magnet. The iron core is installed on the coil bobbin. The magnet is connected between the bottom end of the iron core and one end of the yoke iron. The other end of the yoke iron is snap-connected to an elastic member. One end of the armature is swingably installed on the coil bobbin and corresponds to the top end of the iron core, and the other end of the armature passes through the elastic member and is connected to a transmission member; the coil bobbin includes a bottom mounting block, a middle mounting column, and a top mounting block at the top. The yoke iron is L-shaped and includes a first section and a second section. The first section of the yoke iron is inserted into the bottom mounting block and is in contact with the bottom surface of the magnet. The second section of the yoke iron is connected to the elastic member. The armature is L-shaped and includes a third section and a fourth section. The third section of the armature is swingably installed on the top mounting block and is restricted by the elastic member and abuts against the yoke iron blade edge on the second section of the yoke iron. The fourth section of the armature passes through the elastic member and is connected to the transmission member, and the fourth section is located between the elastic member and the second section of the yoke iron. The second section of the yoke iron is inserted into the elastic member and then clamped by a U-shaped fixing piece, and is fixed by the lower limiting piece of the U-shaped fixing piece and positioned by the stop portion of the upper limiting piece of the U-shaped fixing piece. The armature is pressed below the pressing piece provided on the elastic member, and the armature is limited on the yoke iron blade edge by the pressing piece, and the lateral movement of the armature on the yoke iron is limited by the upper limiting piece provided on the elastic member.

[0012] Preferably, the electromagnetic system also includes a coil frame, a coil, an indicator light module and two connecting columns. The top of the coil frame is provided with two mounting bosses located at the two corners. The connecting columns are inserted into the through holes of the mounting bosses. The coil is sleeved in the middle of the coil frame, and the head end and the tail end of the coil are electrically connected to the connecting columns; the indicator light module is placed on the two mounting bosses and welded to the two connecting columns, and electricity is taken from the coil through the two connecting columns.

[0013] Preferably, the electromagnetic system further comprises a coil frame, a coil and an insert, the coil is mounted on the coil frame, and the first and second ends of the coil are connected to the insert; the insert is mounted in the first chamber of the coil frame, the insert comprises an insert body and a clip, one end of the clip is connected to the insert body, and the other end of the clip is tilted, forming a socket for connecting the lead-out end of the base assembly between the clip and the clamping side wall on one side of the first chamber.

[0014] Preferably, the plug further includes a wiring piece, a fixing protrusion and a bending piece arranged on the plug body, the plug body is T-shaped, the vertical arm part protruding from one end of the horizontal arm of the T-shaped plug body is the wiring piece, and a fixing protrusion is provided on the other end of the horizontal arm of the plug body; the vertical arm of the plug body is connected to one end of the clip, and the other end of the clip is tilted and protrudes from the plug body; one end of the bending piece is connected to the bottom end of the vertical arm of the plug body, and the other end of the bending piece is tilted, and the tilting direction is opposite to the tilting direction of the clip.

[0015] Preferably, the insert body is provided with a movable hole for the clip to move, the movable hole is a square through hole, one end of the clip is connected to the bottom wall of the movable hole of the insert body, and the other end of the clip can swing in the movable hole.

[0016] Preferably, the clip is connected to the insert body via a J-shaped connecting piece, one end of the J-shaped connecting piece is flush connected to the side of the insert body, the other end of the J-shaped connecting piece is parallel to and spaced from the insert body and its bottom edge is connected to the clip.

[0017] In the electromagnetic relay of the present invention, the reaction force spring sheet of the elastic part is connected to the transmission part to provide reaction force for the transmission part, the U-shaped fixing piece is used to clamp and fix the yoke, and the U-shaped connecting piece integrates the reaction force spring sheet and the U-shaped fixing piece into one. The elastic part has a simple structure and can provide a stable and reliable reaction force for the transmission part. It can also be directly plugged into the yoke for positioning, which makes assembly easier and positioning accurate without deviation, thereby improving product reliability.

[0018] In addition, by installing a magnet in the magnetic circuit of the electromagnetic system, there is no need for continuous excitation to maintain the attracted state. The two poles of the magnet polarize the iron core and the yoke iron respectively, and a magnetic holding structure is formed by changing the polarity of the coil excitation. The reversal of the polarity of the magnet and the coil is used to maintain the non-excited state of the electromagnetic system, which is energy-saving and environmentally friendly.

[0019] The indicator light module is directly installed inside the housing and is directly connected through the coil connecting posts provided on the coil holder of the electromagnetic system. To ensure the integrity of the housing, the product can be designed as an airtight product, which simplifies the product assembly and improves production efficiency.

[0020] A socket for connecting the lead-out end is formed between the clamping piece of the insertion piece and the side wall of the chamber of the coil holder, realizing a quick pluggable connection method. It can be directly and quickly plugged with lead-out wires of different shapes, which is conducive to realizing standardized and automated production. The processing technology is simple and the cost is low. Brief Description of the Drawings

[0021] Figure 1 is an exploded perspective view of the electromagnetic relay of the present invention;

[0022] Figure 2 is a perspective view of the base assembly of the present invention;

[0023] Figure 3 is a front view of the base assembly of the present invention;

[0024] Figure 4 is a perspective view of the elastic member of the present invention;

[0025] Figure 5 [[ID=2,5]]is a front view of the elastic member of the present invention;

[0026] Figure 6 is a schematic structural view of the first embodiment of the insertion piece of the present invention;

[0027] Figure 7 is a schematic structural view of the second embodiment of the insertion piece of the present invention;

[0028] Figure 8 is a perspective view of the electromagnetic system of the present invention;

[0029] Figure 9 is a half-sectional view of the electromagnetic system of the present invention;

[0030] Figure 10 is a perspective view of the coil holder of the present invention;

[0031] Figure 11 is an assembly drawing of the electromagnetic system and the insertion piece of the first embodiment of the present invention;

[0032] Figure 12 is an assembly drawing of the electromagnetic system and the insertion piece of the second embodiment of the present invention;

[0033] Figure 13 is a perspective view of the housing of the present invention;

[0034] Figure 14 is a half-sectional view of the housing of the present invention;

[0035] Figure 15It is a perspective view of the buckle plate of the present invention;

[0036] Figure 16 It is a perspective view of the test switch of the present invention;

[0037] Figure 17 It is a side view of the test switch of the present invention;

[0038] Figure 18 It is a bottom view of the test switch of the present invention;

[0039] Figure 19 It is a cross-sectional view of the electromagnetic relay in the unlocking state of the present invention;

[0040] Figure 20 It is a perspective view of the electromagnetic relay in the unlocking state of the present invention;

[0041] Figure 21 It is a cross-sectional view of the electromagnetic relay in the test state of the present invention;

[0042] Figure 22 It is a perspective view of the electromagnetic relay in the test state of the present invention;

[0043] Figure 23 It is a cross-sectional view of the electromagnetic relay in the locked state of the present invention;

[0044] Figure 24 It is a perspective view of the electromagnetic relay in the locked state of the present invention;

[0045] Figure 25 It is a perspective view of the transmission member of the present invention;

[0046] Figure 26 It is a side view of the transmission member of the present invention;

[0047] Figure 27 It is a half-sectional view of the electromagnetic relay in the forward power-on state of the present invention;

[0048] Figure 28 It is a half-sectional view of the electromagnetic relay in the reverse power-on state of the present invention. Detailed implementation manners

[0049] The following Figures 1 to 28 Given embodiments are used to further illustrate the detailed implementation manners of the electromagnetic relay of the present invention. The electromagnetic relay of the present invention is not limited to the descriptions of the following embodiments.

[0050] As Figure 1 shown, the electromagnetic relay of the present invention includes a base assembly 1, a transmission member 2, an electromagnetic system 3, and a housing assembly 4. As Figure 2 and Figure 3As shown in the figure, the base component 1 of the present invention includes a base 11, a moving reed component 12, a static reed component 13, and a lead-out terminal 14 mounted on the base 11. An installation cavity 111 for installing the electromagnetic system 3 is provided on the top surface at one end of the base 11, and a lead-out terminal 14 is connected to the bottom surface. The moving reed component 12 and the static reed component 13 are mounted on the other end of the base 11. A rotating shaft bayonet 112 for the swing installation of the transmission member 2 is provided in the middle of the base 11. As Figure 1 shown, the electromagnetic system 3, the base component 1, and the transmission member 2 are installed in the housing component 4. The electromagnetic system 3 is installed in the installation cavity 111 of the base 11, and the transmission member 2 is swingably installed on the base 11 between the static reed component 13 and the electromagnetic system 3. The base component 1 equipped with the electromagnetic system 3 and the transmission member 2 is installed in the housing component 4, and after vacuum pumping and nitrogen filling, glue is applied at the glue groove at the bottom of the base 11 for sealing.

[0051] As Figure 2 and Figure 3 shown, the moving reed component 12 includes a moving reed 121 and two moving contacts 122. One end of the moving reed 121 is fixed on the base 11, and two symmetrical moving contacts 122 are provided on both sides of the other end. A first avoidance opening 1210 for avoiding the transmission member 2 is provided in the middle of the moving reed 121. The static reed component 13 includes a first static reed 130, a second static reed 131, a normally closed contact 132, and a normally open contact 133. The first static reed 130 and the second static reed 131 are fixedly installed on the base 11 on both sides of the moving reed 121, and the first static reed 130 is close to the transmission member 2. A second avoidance opening 1300 for avoiding the transmission member 2 is provided in the middle of the first static reed 130, and the second avoidance opening 1300 corresponds to the first avoidance opening 1210. A normally closed contact 132 corresponding to one moving contact 122 is provided on the first static reed 130, and a normally open contact 133 corresponding to the other moving contact 122 is provided on the second static reed 131.

[0052] As Figure 8 and Figure 9 shown, the electromagnetic system 3 of the present invention includes a coil bobbin 30, an insert piece 31, a coil 310, an elastic member 32, an iron core 33, a short-circuit ring 34, a yoke 35, an armature 36, a magnet 37, two connecting columns 38, and an indicator light module 39.

[0053] As Figure 4 and Figure 5As shown in the figure, the elastic member 32 of the present invention is an integrally formed structure made of elastic metal, and includes a reaction spring piece 321, a U-shaped connecting piece 322, two U-shaped fixing pieces 323, a plurality of pressing pieces 324, two upper limiting pieces 325 and two lower limiting pieces 326. A clamping interface 3210 for connecting with the transmission member 2 is provided at the bottom end of the reaction spring piece 321, and the reaction spring piece 321 is clamped with the transmission member 2 to provide a reaction force. The bottom end of the middle section of the U-shaped connecting piece 322 is connected to the top end of the reaction spring piece 321, and a pressing piece 324 for limiting the armature 36 is provided at the top end of the middle section of the U-shaped connecting piece 322. The pressing piece 324 is an L-shaped sheet structure with an opening facing away from the armature 36 and is inclined. The number of the pressing pieces 324 is preferably greater than or equal to two, and the plurality of pressing pieces 324 are evenly arranged on the top end of the middle section of the U-shaped connecting piece 322, and elastically press the bending part of the armature 36 for limiting after the armature 36 is installed. The two arm ends of the U-shaped connecting piece 322 are respectively vertically connected to one arm end of the U-shaped fixing piece 323, and the two U-shaped fixing pieces 323 are symmetrically arranged with their openings facing each other, and the openings of the two U-shaped fixing pieces 323 are used for clamping the two sides of the yoke 35. Upper limiting pieces 325 are provided at the top ends of the middle sections of the two U-shaped fixing pieces 323, and lower limiting pieces 326 are provided at the bottom ends. The lower limiting piece 326 is an arc-shaped piece, and the two lower limiting pieces 326 are symmetrically arranged with their convex parts facing each other and concave openings facing away from each other, and the lower limiting pieces 326 of the two U-shaped fixing pieces 323 cooperate to clamp the yoke 35. The two upper limiting pieces 325 are symmetrically arranged. The upper limiting piece 325 is an integrally formed structure, and includes a stop portion 3251, a clamping portion 3252 and a pressing portion 3253 connected in sequence. The clamping portion 3252 is vertically arranged, and the clamping portions 3252 of the two upper limiting pieces 325 cooperate to clamp the armature 36; the stop portion 3251 is horizontally arranged, and the stop portion 3251 is vertically connected between the top end of the U-shaped fixing piece 323 and the bottom end of the clamping portion 3252 for positioning the yoke 35; the pressing portion 3253 is connected to the top end of the clamping portion 3252, and the pressing portions 3253 of the two upper limiting pieces 325 are symmetrically arranged with their convex parts facing each other and concave openings facing away from each other, and are used for pressing the armature 36 to form a limit on the armature 36. In the electromagnetic relay of the present invention, the reaction spring piece of the elastic member is connected to the transmission member to provide a reaction force for the transmission member, the U-shaped fixing piece is used for clamping and fixing the yoke, and the U-shaped connecting piece integrates the reaction spring piece and the U-shaped fixing piece. The elastic member has a simple structure, can provide a stable and reliable reaction force for the transmission member, and can be directly inserted and positioned with the yoke, and the assembly is simpler, the positioning is accurate without deviation, and the reliability of the product is improved. The setting of the two lower limiting pieces of the elastic member further limits and fixes the yoke, and improves the stability and reliability of the positioning and fixing of the yoke by the elastic member. The elastic pressing piece and the upper limiting piece of the elastic member are used to limit the armature, and the positioning of the armature can be completed at one time except for the rotation direction, without riveting and welding, and the positioning is better.

[0054] As Figure 6 and Figure 7As shown in the figure, the insert piece 31 of the present invention includes an insert piece body 311, and a clamping piece 312, a connecting piece 313, a fixing protrusion 314 and a bending piece 315 provided on the insert piece body 311. The insert piece body 311 is T-shaped. One end of the horizontal arm of the T-shaped insert piece body 311 protrudes from the vertical arm part to be the connecting piece 313. A fixing protrusion 314 is provided on the side wall of the other end of the horizontal arm of the insert piece body 311. The fixing protrusion 314 is a wedge-shaped sheet structure; one end of the vertical arm of the insert piece body 311 is connected to one end of the clamping piece 312, and the other end of the clamping piece 312 warps and protrudes from the insert piece body 311; one end of the bending piece 315 is connected to the bottom end of the vertical arm of the insert piece body 311, and the other end of the bending piece 315 warps, and the warping direction is opposite to the warping direction of the clamping piece 312. As Figure 6 shown, in the first embodiment of the insert piece 31 of the present invention, a movable hole 316 for the clamping piece 312 to move is provided on the vertical arm of the insert piece body 311. The movable hole 316 is a square through hole. One end of the clamping piece 312 is connected to the bottom wall of the movable hole 316 of the insert piece body 311, and the other end of the clamping piece 312 can swing in the movable hole 316. As Figure 7 shown, in the second embodiment of the insert piece 31 of the present invention, the clamping piece 312 is connected to the vertical arm of the insert piece body 311 through a J-shaped connecting piece 317. One end of the J-shaped connecting piece 317 is flush-connected to the side of the vertical arm of the insert piece body 311. The other end of the J-shaped connecting piece 317 is parallel and spaced from the vertical arm of the insert piece body 311, and its bottom edge is connected to the clamping piece 312; in this embodiment, the bending piece 315 and the clamping piece 312 are symmetrically arranged in such a way that the root spacing is smaller than the end spacing.

[0055] As Figure 10 shown, the coil bobbin 30 of the present invention includes a bottom mounting block 301, a middle mounting column 302 and a top mounting block 303. The insert piece 31 is inserted into the first chamber 306 of the bottom mounting block 301 and cooperates with the side wall of the first chamber 306 to form a quickly pluggable socket. An enameled wire is wound around the mounting column 302 to form a coil 310, and the head and tail ends of the coil 310 are connected to the insert piece 31. As Figure 11 and Figure 12As shown, the bottom mounting block 301 of the bobbin 30 is provided with a first chamber 306 for mounting the insertion piece 31. One side wall of the first chamber 306 is a fixed side wall 307, and the other side wall is a clamping side wall 308. The fixed side wall 307 of the first chamber 306 is provided with a limiting inclined surface 309 that cooperates with the bending piece 315. The insertion piece 31 is inserted into the first chamber 306. The insertion piece 31 is in contact with the fixed side wall 307 of the first chamber 306. The bending piece 315 of the insertion piece 31 cooperates with the limiting inclined surface 309 to limit the insertion piece 31. Due to the presence of the fixed protrusion 314 of the insertion piece 31, the insertion piece 31 is fixed by interference fit with the first chamber 306. There is a socket between the clamping piece 312 of the insertion piece 31 and the clamping side wall 308 for connecting the lead-out end 14 of the base assembly 1, realizing a quick plug-in connection method. It can be directly and quickly plugged into lead-out ends with different shapes, which is conducive to realizing standardized and automated production. The processing technology is simple and the cost is low. The bottom mounting block 301 of the bobbin 30 has two first chambers 306, and the two first chambers 306 are symmetrically arranged. Correspondingly, the number of insertion pieces 31 and lead-out ends 14 is two. One insertion piece 31 is installed in each first chamber 306, and the two insertion pieces 31 are connected to the two lead-out ends 14 in a one-to-one correspondence. One end of the lead-out end 14 is used to connect to an external power supply outside the electromagnetic relay, and the other end of the lead-out end 14 extends into the installation cavity 111 and can be plugged into the socket of the insertion piece 31.

[0056] As Figures 8 - 10As shown, the bobbin 30 is provided with an axially installed hole 304. The axially installed hole 304 penetrates through the top mounting block 303 and the mounting post 302 and extends to communicate with the second chamber of the bottom mounting block 301. The iron core 33 is inserted into the axially installed hole 304. The magnet 37 is inserted into the second chamber of the bottom mounting block 301 and connected to the bottom end of the iron core 33; the yoke 35 is L-shaped, including a first section 351 and a second section 352. The first section 351 of the yoke 35 is inserted into the second chamber of the bottom mounting block 301 and fits against the bottom surface of the magnet 37. The second section 352 of the yoke 35 is connected to the elastic member 32; the electromagnetic relay is designed as a magnetic latching relay. The two poles of the magnet 37 polarize the iron core 33 and the yoke 35 respectively, and form a magnetic latching structure through the change of the polarity excited by the coil 310. A magnet is installed in the magnetic circuit of the electromagnetic system. There is no need to continuously apply excitation to maintain the suction state. The two poles of the magnet polarize the iron core and the yoke respectively, and form a magnetic latching structure through the change of the polarity excited by the coil. The non-excitation state of the electromagnetic system is maintained by reversing the polarity of the magnet and the coil, which is energy-saving and environmentally friendly. The short-circuit ring 34 is assembled on the top end of the iron core 33 and rests on the top mounting block 303. The armature 36 is L-shaped, including a third section 361 and a fourth section 362. The third section 361 of the armature 36 is swingably installed on the top mounting block 303 above the short-circuit ring 34 and is restricted by the elastic member 32 to abut against the yoke edge on the second section 352 of the yoke 35. The fourth section 362 of the armature 36 passes through the elastic member 32 and is connected to the transmission member 2. The fourth section 362 is located between the U-shaped connecting piece 322 of the elastic member 32 and the second section 352 of the yoke 35. During installation, the second section 352 of the yoke 35 is inserted into the elastic member 32 and then clamped on the yoke 35 by the U-shaped fixing piece 323, and is fixed by the lower limiting piece 326 of the U-shaped fixing piece 323 and positioned by the stop portion 3251 of the upper limiting piece 325 of the U-shaped fixing piece 323; the armature 36 is pressed below the pressing piece 324 provided on the elastic member 32. The armature 36 is limited on the yoke edge by the pressing piece 324, and the lateral movement of the armature 36 on the yoke 35 is limited by the upper limiting piece 325 provided on the elastic member 32. The clamping portion 3252 of the two upper limiting pieces 325 clamps and fixes it, and the pressing portion 3253 of the two upper limiting pieces 325 presses and positions it.

[0057] As Figures 8 - 10As shown, on the top mounting block 303 of the bobbin 30, there are two mounting bosses 305 located at both corners. The two connecting columns 38 are respectively mounted on the two mounting bosses 305. The connecting column 38 is inserted into the through hole of the mounting boss 305. The indicator light module 39 is placed on the two mounting bosses 305 and is welded and fixed to the two connecting columns 38. A semi-encapsulated space for the armature 36 to swing up and down is formed between the indicator light module 39 and the top mounting block 303. The indicator light module 39 consists of a circuit board and components such as light-emitting diodes and resistors welded on the circuit board. It should be noted that the indicator light module 39 can emit light when powered on, which can be achieved by existing technologies. When the product is of AC specification, after the enameled wire is wound, the head and tail ends of the coil 310 are connected to the connection piece 313 of the insert 31. A secondary winding is wound outside the coil 310. The head and tail ends of the secondary winding of the coil 310 are connected to the connecting column 38, so that the indicator light module 39 draws power from the coil 310 through the two connecting columns 38 and the secondary winding of the coil 310. When the product is of DC specification, after the coil 310 is wound, the head and tail ends are connected to the insert 31, and the connecting column 38 is extended to be connected to the insert 31, so that the indicator light module 39 draws power from the coil 310 through the two connecting columns 38 and the two inserts 31. The indicator light module is directly installed in the housing, and is directly connected through the coil connecting column provided on the electromagnetic system bobbin. By ensuring the integrity of the housing, the product can be designed as an airtight product, which simplifies the product assembly and improves the production efficiency.

[0058] As Figure 8 and Figure 9 shown, the working principle of the electromagnetic system 3 of the present invention: The electromagnetic system 3 forms a circuit through the lead-out end 14 and the insert 31. When the electromagnetic system 3 is powered on in the forward direction, after the iron core 33 in the middle of the bobbin 30 is magnetized and polarized, an electromagnetic attraction force is formed on the armature 36 that has been polarized by the magnet 37, driving the third section 361 of the armature 36 to close and hold against the iron core 33, and the fourth section 362 of the armature 36 then pushes the transmission member 2. When the electromagnetic system 3 is powered on in the reverse direction, after the polarity of the iron core 33 is polarized in the opposite direction, an electromagnetic thrust is formed on the armature 36 that has been polarized by the magnet 37, driving the third section 361 of the armature 36 to separate from the iron core 33 and hold, and the fourth section 362 of the armature 36 then pulls back the transmission member 2. Among them, the iron core assembly composed of the short-circuit ring 34 and the iron core 33 has a magnetic shunting effect on the alternating current, ensuring that the electromagnetic attraction force on the end face of the iron core 33 is not zero when the alternating current passes through zero. The connecting column 38 draws power from the head and tail ends of the coil 310, and plays a role in monitoring the power-on state of the electromagnetic system 3 by the lighting of the indicator light module 39. As Figure 1 shown, the housing assembly 4 of the present invention includes a buckle plate 43, a housing 41 and a test switch 42. As Figure 13As shown, the housing 41 is transparent. The housing 41 is provided with a mounting groove 411 for mounting the buckle plate 43 and a sunk groove 412 for mounting the test switch 42. The mounting groove 411 connects the sunk groove 412 to the outside of the housing 41, and the sunk groove 412 connects the mounting groove 411 to the inside of the housing 41. The side of the buckle plate 43 is provided with a fixed ear 431, and the side wall of the mounting groove 411 is provided with a fixing groove 413 that cooperates with the fixed ear 431. As Figure 15 As shown, the buckle plate 43 is provided with an operation port 432, a test port 433, an indicator light window 434 and an action indication window 435. The buckle plate 43 is a rectangular plate. Along the long side direction of the buckle plate 43, the operation port 432, the test port 433 and the indicator light window 434 are sequentially arranged at the middle position of the buckle plate 43. The number of the action indication windows 435 is two, and the two action indication windows 435 are symmetrically arranged on both sides of the operation port 432.

[0059] As Figure 13 and Figure 14 As shown, the sunk groove 412 of the housing 41 is a convex-shaped groove. The wide side part of the sunk groove 412 is internally provided with support bosses 414 for supporting the test switch 42 on both side walls. On the two side walls of the wide side part of the sunk groove 412, there are sequentially a buckle platform 415 and a gear protrusion 416 located above the support bosses 414. The buckle platform 415 is spaced from the support bosses 414. Between the two side walls in the narrow side part of the sunk groove 412, there are sequentially a first locking part 417 and a second lock 418. The second lock 418 is arranged in contact with the end side wall of the narrow side part of the sunk groove 412, and the end of the second lock 418 has a pressing slope 419 that cooperates with the pressed slope 4215.

[0060] As Figures 16 - 24 As shown, when the test switch 42 is installed in the sunk groove 412 and slides along the sunk groove 412, it has an unlocking gear, a test gear and a locking gear. The test switch 42 is provided with a first lock part 4211 that cooperates with the first locking part 417 in the sunk groove 412 and a triggering part 4210 that cooperates with the armature 36. When the test switch 42 slides to the unlocking gear, the first lock part 4211 of the test switch 42 and the first locking part 417 are locked, so that the triggering part 4210 of the test switch 42 cannot contact the armature 36. When the test switch 42 slides to the test gear or the locking gear, the locking between the first locking part 417 and the first lock part 4211 is released. The electromagnetic relay of the present invention has an anti-misoperation function. When the test switch 42 is in the unlocked state, the first lock part 4211 of the test switch 42 is engaged with the first locking part of the housing 41, preventing the test switch 42 from pressing down the armature 36 and causing misoperation, effectively avoiding unnecessary functional abnormalities caused by misoperation and improving the reliability of the product.

[0061] As Figures 16 - 18As shown in the figure, the test switch 42 of the present invention includes a slider 4201 and an elastic piece 4209. The slider 4201 is slidably fitted with the side wall of the sunk groove 412. The slider 4201 is provided with a pushing boss 4208 at the top. Anti-slip stripes are provided on the top surface of the pushing boss 4208 to play an anti-slip role and facilitate manual operation of pushing the pushing boss 4208. The pushing boss 4208 of the test switch 42 is located within the operation port 432 of the buckle plate 43. Sliding protrusions 4202 and gear elastic pieces 4203 are provided on the side wall of the slider 4201. The supporting boss 414 supports the slider 4201. The sliding protrusion 4202 of the slider 4201 is snapped between the supporting boss 414 and the buckling platform 415 and can slide along the buckling platform 415 to achieve the sliding fit between the slider 4201 and the side wall of the sunk groove 412. The two ends of the gear elastic piece 4203 are respectively connected to the side wall of the slider 4201. Unlocking grooves 4204, test grooves 4205 and locking grooves 4206 are successively provided on the outer side surface of the middle part of the gear elastic piece 4203. The gear protrusion 416 in the sunk groove 412 and the unlocking grooves 4204, test grooves 4205 and locking grooves 4206 cooperate to form an unlocking gear, a test gear and a locking gear. The inner side surface of the middle part of the gear elastic piece 4203 is wavy, has a protruding structure corresponding to the unlocking grooves 4204, test grooves 4205 and locking grooves 4206, and has an activity gap 4207 with the side wall of the slider 4201. The unlocking gear, test gear and locking gear formed by the cooperation between the elastic groove of the test switch 42 and the immovable protrusion of the housing 41 have a simple structure, will not cause great resistance to the sliding of the test switch 42, are simple and labor-saving for manually pushing the test switch 42, and at the same time, the formed gears are stable.

[0062] As Figures 16 - 18 shown, one end of the elastic piece 4209 is connected to the bottom surface of the slider 4201. The other end of the elastic piece 4209 is a movable end. A touch part 4210, a second locking part 4212 and a test platform 4213 are provided on the movable end. One end of the second locking part 4212 is connected to one end of the touch part 4210, and there is an adjustment gap 4214 between the other ends, forming a horizontally placed U-shaped structure; the test platform 4213 is an inverted L-shaped structure. The bottom end of the test platform 4213 is connected to the end of the U-shaped structure. The top end of the test platform 4213 extends to the left to form a first locking part 4211 flush with the right part of the top end. The test platform 4213 and the first locking part 4211 form a T-shaped structure. A test groove 4205 is provided on the test platform 4213. When the test switch 42 slides to the test gear, the test groove 4205 is aligned with the test port 433.

[0063] As Figures 16 - 18As shown, the second locking portion 4212 of the elastic sheet 4209 has a pressure-bearing inclined surface 4215, which cooperates with the pressing inclined surface 419 in the recess 412. When the test switch 42 slides to the locked position, the pressing inclined surface 419 squeezes the pressure-bearing inclined surface 4215 of the elastic sheet 4209, causing the movable end of the elastic sheet 4209 to move downward. The trigger portion 4210 on the movable end then moves downward until it contacts the armature 36, at which point the second locking portion 4212 and the second lock catch 418 are locked. An adjustment gap 4214 is defined between the second locking portion 4212 and the trigger portion 4210. The presence of the adjustment gap 4214 allows the elastic deformation of the elastic sheet 4209 to reduce the interference fit between the test switch 42 and the armature 36.

[0064] like Figures 19 - 20 As shown, when the test switch 42 is in the unlocked state, that is, when the gear protrusion 416 is stuck in the unlocking groove 4204, the first locking portion 4211 of the test switch 42 is engaged with the first locking portion 417 of the cover 41, thereby locking the test switch 42. At this time, the trigger portion 4210 of the test switch 42 cannot press down the armature 36 and interfere with the armature 36. The product can move freely through the power-on excitation of the electromagnetic system 3, preventing the test switch 42 from malfunctioning and causing malfunction of the product. Figures 21 - 22 As shown, when the test switch 42 slides to the test state, that is, when the gear protrusion 416 is stuck in the test groove 4205, the first locking portion 4211 of the test switch 42 is separated from the first locking portion 417 of the cover 41. At this time, the touch portion 4210 is in critical contact with the armature 36. In addition, at this time, a jog test can be performed through the test port 433 provided on the buckle plate 43, that is, the test groove 4205 is operated with a tool to press the test platform 4213, and the touch portion 4210 moves downward to contact the armature 36, driving the transmission member 2 to drive the dynamic reed assembly 12 to operate, thereby switching the contact state. After the test is completed and the pressing force on the test platform 4213 is removed, the touch portion 4210 returns to the critical contact state with the armature 36. Figures 23 - 24As shown in the figure, when the test switch 42 is further slid to the locked state, the pressed inclined surface 4215 of the elastic piece 4209 of the test switch 42 slides along the pressing inclined surface 419 of the housing 41 to form a downward pressing on the elastic piece 4209. The actuating part 4210 of the elastic piece 4209 presses the armature 36, driving the armature 36 to move, and further driving the transmission member 2 to drive the moving contact spring piece assembly 12 to move. Finally, the second locking part 4212 is locked below the second locking buckle 418 of the housing 41. At this time, the actuating part 4210 cannot move up and reset, maintaining the pressing of the armature 36, thereby locking the contact state. At this time, the gear protrusion 416 remains stuck in the locking groove 4206. Through the above structural design, the test switch only needs one structural member to cooperate with the housing to form all functions of unlocking, testing, and locking. The three switch states do not interfere with each other, effectively preventing misoperation, and the assembly is simple and the cost is lower.

[0065] As Figures 25 - 28 shown, the elastic member 32 is connected between the yoke 35 and the transmission member 2. The armature 36 is connected to the transmission member 2 and can drive the transmission member 2 to further drive the moving contact spring piece assembly 12 of the base assembly 1. The transmission member 2 is installed on the base 11 and is swingable or movable relative to the base 11. The transmission member 2 includes a push rod 202 and a pull-back hook 203 corresponding to the moving contact spring piece assembly 12. As Figure 27 shown, when the electromagnetic system 3 of the electromagnetic relay is energized forward, the electromagnetic system 3 drives the armature 36 to move, thereby pushing the transmission member 2. The elastic member 32 undergoes elastic deformation. At the same time, the push rod 202 of the transmission member 2 pushes the moving contact spring piece assembly 12 to close the normally open contact 133 of the static contact spring piece assembly 13 / open the normally closed contact 132. When the electromagnetic relay is de-energized and non-excited, the moving contact spring piece assembly 12 is maintained to close the normally open contact 133 of the static contact spring piece assembly 13 / open the normally closed contact 132. As Figure 28 shown, when the electromagnetic system 3 of the electromagnetic relay is energized reversely, it drives the armature 36 to move reversely. Under the combined action of the pulling force of the armature 36 and the deformation force of the elastic member 32, the transmission member 2 is pulled back. Then, the pull-back hook 203 of the transmission member 2 pulls the moving contact spring piece assembly 12 to open the normally open contact 133 of the static contact spring piece assembly 13 / close the normally closed contact 132. When the electromagnetic relay is de-energized and non-excited, the moving contact spring piece assembly <12> is maintained to open the normally open contact 133 of the static contact spring piece assembly 13 / close the normally closed contact 132. The transmission structure of the electromagnetic relay of the present invention realizes bidirectional transmission through the mutual cooperation among the transmission member 2, the elastic member 32 and the yoke 35, and the cooperation between the push rod 202 and the pull-back hook 203 of the transmission member 2 and the moving contact spring piece assembly 12. The transmission member 2 can not only push the moving contact spring piece assembly 12 to close the normally open contact 133, but also pull the moving contact spring piece assembly 12 to close the normally closed contact 132, effectively solving the problem of relatively small normally closed pressure and insufficient working reliability caused by only the elasticity of the moving contact spring piece 121 in the traditional one, and improving the reliability of the product.

[0066] As shown Figure 25 in the figure, one end of the transmission member 2 is integrally provided with an action indicating piece 205, and the action indicating piece 205 is correspondingly arranged with an action indicating window 435 on the buckle plate 43. The other end of the transmission member 2 is integrally provided with a rotating shaft 206, and the rotating shaft 206 is matched with the rotating shaft bayonet 112 of the base 11. The rotating shaft 206 of the transmission member 2 is inserted into the rotating shaft bayonet 112 to enable the transmission member 2 to be swingably mounted on the base 11 with the rotating shaft 206 as a fulcrum. As shown Figure 27 in the figure, when the electromagnetic relay is in the forward power-on state, the action indicating piece 205 is directly opposite to the action indicating window 435, and the action indicating piece 205 can be seen through the action indicating window 435 from outside the housing 41. As shown Figure 28 in the figure, when the electromagnetic relay is in the reverse power-on state, the action indicating piece 205 is misaligned with the action indicating window 435, and the action indicating piece 205 cannot be seen through the action indicating window 435 from outside the housing 41. The transmission member 2 and the action indicating piece 205 are integrated, eliminating the hinge connection between the action indicating member and the transmission member, reducing parts, and lowering the assembly complexity. The action indication is changed from traditional translational motion to swinging motion, increasing the working stroke and being beneficial to the effective identification by customers.

[0067] As shown Figures 25 - 26As shown, in a specific embodiment, the transmission member 2 of the present invention is an integrally formed structure, including a sheet-shaped H-shaped body 201, a push rod 202, a pull-back hook 203, a fixing block 204, an action indicating piece 205, and a rotating shaft 206. The push rod 202 is a square long bar, and the width of the first avoidance opening 1210 of the moving reed 121 < the width of the push rod 202 < the width of the second avoidance opening 1300 of the first static reed 130. Two vertical arms of the H-shaped body 201 extend towards the electromagnetic system 3 at the top ends to form two action indicating pieces 205. Rotating shafts 206 are provided at the bottom ends of the two vertical arms of the H-shaped body 201, and the rotating shafts 206 are matched with the rotating shaft bayonet 112 of the base 11. The H-shaped body 201 is swingably mounted on the base 11 between the static reed assembly 13 and the electromagnetic system 3 through the rotating shafts 206. Longitudinal reinforcing ribs 209 are provided on both vertical arms of the H-shaped body 201 to improve the firmness of the transmission structure. On one side of the cross arm of the H-shaped body 201, that is, on the side facing the electromagnetic system 3, there are successively connected a clamping block 207 and a fixing block 204. On the other side of the cross arm of the H-shaped body 201, there are successively connected a push rod 202 and a pull-back hook 203. The clamping block 207 is matched with the clamping opening 3210 of the elastic member 32 for clamping the elastic member 32. An armature clamping groove 208 for clamping the armature 36 is provided on the fixing block 204. The pull-back hook 203 is a horizontally placed T-shaped structure. The narrow end of the pull-back hook 203 is connected to the end of the push rod 202. The wide end of the T-shaped pull-back hook 203 has two protruding hook parts 2030, and the height of the first avoidance opening 1210 of the moving reed 121 < the height of the wide end of the pull-back hook 203 < the height of the second avoidance opening 1300 of the first static reed 130. An avoidance inclined surface 2�31 for avoiding the moving reed 121 is provided at the end of the hook part 2030 of the pull-back hook 203, and the avoidance inclined surface 2031 is consistent with the swing amplitude of the transmission member 2. When the pull-back hook 203 of the transmission member 2 is pulled back during reverse power-on of the electromagnetic relay, due to the fulcrum effect of the rotating shaft 206 provided on the transmission member 2, the hook part 2030 of the transmission member 2 also tilts accordingly, and the avoidance inclined surface 2031 provided on the hook part 2030 is consistent with the angle after the transmission member 2 swings, so as to ensure that the cooperation between the hook part 2030 and the moving reed 121 is relatively parallel, which is convenient for improving the smoothness and reliability of the hook part 2030 pulling the moving reed 121. The sheet-shaped structure of the transmission member 2 is simple and light, which improves the sensitivity of transmission, reduces the occupied space, and is beneficial to the reasonable and compact layout of the overall structure of the product.

[0068] As Figures 27 - 28As shown, the elastic member 32 is snap-fitted onto the snap block 207 of the transmission member 2 through the snap interface 3210 thereon, and the end of the armature 36 is snap-fitted into the armature slot 208 of the transmission member 2. The transmission member and the armature adopt the snap-fitting method of the slot instead of the traditional lapping method, avoiding phenomena such as transmission jamming and detachment. When the electromagnetic relay is reversely powered on, under the combined action of the deformation force of the elastic member 32 and the electromagnetic force on the armature 36, the transmission member 2 pulls back the moving reed 121, further solving the problem that the traditional one can only generate pressure through the elasticity of the moving reed 121 itself, resulting in relatively small normally closed pressure and insufficient working reliability, and improving the reliability of the product. The rotating shaft 206 of the transmission member 2 is inserted into the rotating shaft bayonet 112 of the base 11, and the push rod 202 of the transmission member 2 passes through the second avoidance port 1300 of the first static reed 130 and can be blocked by the moving reed 121 without passing through the first avoidance port 1210 of the moving reed 121. The pull-back hook 203 sequentially passes through the second avoidance port 1300 of the first static reed 130 and the first avoidance port 1210 of the moving reed 121. The hook portion 2030 of the pull-back hook 203 can hook the moving reed 121, making it impossible for the pull-back hook 203 to reverse and pass through the first avoidance port 1210 again. When the pull-back hook 203 moves in the reverse direction of the passing direction, its hook portion 2030 hooks the moving reed 121, so that the pull-back hook 203 can synchronously drive the moving reed 121.

[0069] The above content is a further detailed description of the present invention in combination with specific preferred implementation manners, and it cannot be determined that the specific implementation of the present invention is only limited to these descriptions. For those of ordinary skill in the technical field to which the present invention pertains, without departing from the concept of the present invention, several simple deductions or substitutions can still be made, and all should be regarded as belonging to the protection scope of the present invention.

Claims

1. An electromagnetic relay, comprising a base assembly (1), a transmission member (2) and an electromagnetic system (3), wherein the electromagnetic system (3) comprises an elastic member (32), a yoke (35) and an armature (36), wherein the armature (36) is connected to the transmission member (2) and can drive the transmission member (2) and thereby drive a movable spring assembly (12) of the base assembly (1), and the elastic member (32) is connected between the transmission member (2) and the yoke (35); Its characteristics are: The elastic member (32) comprises a reaction spring piece (321), a U-shaped connecting piece (322) and two U-shaped fixing pieces (323). The bottom end of the reaction spring piece (321) is connected to the transmission member (2). The bottom end of the middle section of the U-shaped connecting piece (322) is connected to the top end of the reaction spring piece (321). The two arm ends of the U-shaped connecting piece (322) are respectively vertically connected to the end of one arm of the U-shaped fixing piece (323). The two U-shaped fixing pieces (323) are symmetrically arranged with their openings facing each other. The openings of the two U-shaped fixing pieces (323) are used to clamp the two side edges of the yoke (35).

2. The electromagnetic relay according to claim 1, wherein: A pressing piece (324) for limiting the armature (36) is provided on the top of the middle section of the U-shaped connecting piece (322).

3. The electromagnetic relay according to claim 2, wherein: The bottom ends of the middle sections of the two U-shaped fixing pieces (323) are each provided with a lower limiting piece (326) for clamping the yoke (35), and the top ends of the middle sections of the two U-shaped fixing pieces (323) are each provided with an upper limiting piece (325) for limiting the yoke (35) and the armature (36).

4. The electromagnetic relay according to claim 3, wherein: The pressing piece (324) is an L-shaped sheet structure with its opening facing away from the armature (36) and arranged obliquely; the lower limiting piece (326) is an arc piece, and the lower limiting pieces (326) of the two U-shaped fixing pieces (323) are symmetrically arranged with their convex parts facing each other and their concave parts facing away from each other, and the two lower limiting pieces (326) cooperate to clamp the yoke (35).

5. The electromagnetic relay according to claim 3, wherein: The upper limit plates (325) of the two U-shaped fixing plates (323) are symmetrically arranged. The upper limit plates (325) include a stopper (3251) for positioning the yoke (35), a clamping portion (3252) for limiting the armature (36), and a pressing portion (3253). The clamping portion (3252) is vertically arranged, and the stopper (3251) is horizontally arranged and vertically connected between the top end of the U-shaped fixing plate (323) and the bottom end of the clamping portion (3252). The pressing portion (3253) is connected to the top end of the clamping portion (3252). The pressing portions (3253) of the two upper limit plates (325) are symmetrically arranged in a manner that the protrusions face each other and the recesses face back to back.

6. The electromagnetic relay according to any one of claims 1 to 5, characterized in that: The electromagnetic system (3) further comprises a coil frame (30), an iron core (33) and a magnet (37), wherein the iron core (33) is mounted on the coil frame (30), the magnet (37) is connected between the bottom end of the iron core (33) and one end of a yoke (35), the other end of the yoke (35) is engaged with an elastic member (32), one end of the armature (36) is swingably mounted on the coil frame (30) and corresponds to the top end of the iron core (33), and the other end of the armature (36) passes through the elastic member (32) and is connected to the transmission member (2).

7. The electromagnetic relay according to claim 5, characterized in that: The electromagnetic system (3) further comprises a coil frame (30), an iron core (33) and a magnet (37), wherein the iron core (33) is mounted on the coil frame (30), the magnet (37) is connected between the bottom end of the iron core (33) and one end of a yoke (35), the other end of the yoke (35) is engaged with an elastic member (32), one end of the armature (36) is swingably mounted on the coil frame (30) and corresponds to the top end of the iron core (33), and the other end of the armature (36) passes through the elastic member (32) and is engaged with the transmission member. The coil frame (30) includes a bottom mounting block (301), a middle mounting column (302) and a top mounting block (303). The yoke (35) is L-shaped and includes a first section (351) and a second section (352). The first section (351) of the yoke (35) is inserted into the bottom mounting block (301) and fits the bottom surface of the magnet (37). The second section (352) of the yoke (35) is connected to the elastic member (32). The armature (36) is L-shaped and includes a third section ( The third section (361) of the armature (36) is swingably mounted on the top mounting block (303) and is restricted by the elastic member (32) to abut against the yoke blade on the second section (352) of the yoke (35). The fourth section (362) of the armature (36) passes through the elastic member (32) and is connected to the transmission member (2). The fourth section (362) is located between the elastic member (32) and the second section (352) of the yoke (35). The second section (352) of the yoke (35) is inserted into the elastic member (32). The elastic member (32) is clamped by the U-shaped fixing piece (323) and fixed by the lower limiting piece (326) of the U-shaped fixing piece (323) and positioned by the stopper (3251) of the upper limiting piece (325) of the U-shaped fixing piece (323); the armature (36) is pressed into the lower part of the pressing piece (324) provided on the elastic member (32), and the armature (36) is limited on the yoke iron blade by the pressing piece (324), and the lateral movement of the armature (36) on the yoke iron (35) is limited by the upper limiting piece (325) provided on the elastic member (32).

8. The electromagnetic relay according to claim 1, wherein: The electromagnetic system (3) further comprises a coil frame (30), a coil (310), an indicator light module (39) and two connecting posts (38); the top of the coil frame (30) is provided with two mounting bosses (305) located at two corners; the connecting posts (38) are inserted into through holes of the mounting bosses (305); the coil (310) is sleeved in the middle of the coil frame (30); the head end and the tail end of the coil (310) are electrically connected to the connecting posts (38); the indicator light module (39) is placed on the two mounting bosses (305) and is welded and fixed to the two connecting posts (38); and electricity is taken from the coil (310) via the two connecting posts (38).

9. The electromagnetic relay according to claim 1, wherein: The electromagnetic system (3) further comprises a coil frame (30), a coil (310) and an insert (31), wherein the coil (310) is mounted on the coil frame (30), and the first and second ends of the coil (310) are connected to the insert (31); the insert (31) is mounted in a first chamber (306) of the coil frame (30), and the insert (31) comprises an insert body (311) and a clip (312), one end of the clip (312) is connected to the insert body (311), and the other end of the clip (312) is tilted, forming a socket for connecting the lead-out end (14) of the base assembly (1) between the clip and the clamping side wall (308) on one side of the first chamber (306).

10. The electromagnetic relay according to claim 9, wherein: The plug (31) further comprises a connecting piece (313), a fixing protrusion (314) and a bending piece (315) arranged on the plug body (311); the plug body (311) is T-shaped; the vertical arm portion protruding from one end of the horizontal arm of the T-shaped plug body (311) is the connecting piece (313); the other end of the horizontal arm of the plug body (311) is provided with a fixing protrusion (314); the vertical arm of the plug body (311) is connected to one end of the clip (312), and the other end of the clip (312) is tilted and protrudes from the plug body (311); one end of the bending piece (315) is connected to the bottom end of the vertical arm of the plug body (311), and the other end of the bending piece (315) is tilted, and the tilting direction is opposite to the tilting direction of the clip (312).

11. The electromagnetic relay according to claim 9, wherein: The insert body (311) is provided with a movable hole (316) for the clip (312) to move. The movable hole (316) is a square through hole. One end of the clip (312) is connected to the bottom wall of the movable hole (316) of the insert body (311), and the other end of the clip (312) can swing in the movable hole (316).

12. The electromagnetic relay according to claim 9, wherein: The clip (312) is connected to the insert body (311) via a J-shaped connecting piece (317). One end of the J-shaped connecting piece (317) is flush with the side of the insert body (311). The other end of the J-shaped connecting piece (317) is parallel to and spaced from the insert body (311), and its bottom edge is connected to the clip (312).

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