CN114334547A

CN114334547A - Electromagnetic relay

Info

Publication number: CN114334547A
Application number: CN202011072008.0A
Authority: CN
Inventors: 王�琦; 王平涛
Original assignee: Zhejiang Chint Electrics Co Ltd
Current assignee: Zhejiang Chint Electrics Co Ltd
Priority date: 2020-10-09
Filing date: 2020-10-09
Publication date: 2022-04-12

Abstract

The invention discloses an electromagnetic relay, which comprises a base component, a transmission component and an electromagnetic system, wherein the electromagnetic system comprises an elastic piece, a yoke and an armature; the elastic piece comprises a counter-force elastic piece, a U-shaped connecting piece and two U-shaped fixing pieces, the bottom end of the counter-force elastic piece is connected with the transmission piece, the bottom end of the middle section of the U-shaped connecting piece is connected with the top end of the counter-force elastic piece, two arm end portions of the U-shaped connecting piece are respectively and vertically connected with one arm end portion of each U-shaped fixing piece, and the two U-shaped fixing pieces are symmetrically arranged in a mode that the openings are opposite. According to the electromagnetic relay, the counter-force elastic sheet of the elastic piece is connected with the transmission piece to provide counter-force for the transmission piece, the U-shaped fixing sheet is used for clamping and fixing the yoke iron, the counter-force elastic sheet and the U-shaped fixing sheet are integrated into a whole through the U-shaped connecting sheet, counter-force can be provided for the transmission piece, the counter-force elastic sheet and the yoke iron can be directly inserted and positioned, and positioning is accurate and free of deviation.

Description

Electromagnetic relay

Technical Field

The invention relates to the technical field of low-voltage electric appliances, in particular to an electromagnetic relay.

Background

The existing electromagnetic relay and electromagnetic system have the following problems: 1. the armature of the electromagnetic system needs to be positioned by using an elastic sheet, part of manufacturers rivet or weld the elastic sheet on a yoke, and the other part of manufacturers position by using a base, wherein the former has complex process and high cost, and the latter has inevitable deviation in positioning due to long size chain; 2. the coil inserting piece and the leading-out end of the electromagnetic system are connected or integrally processed, or the coil inserting piece and the leading-out end are riveted and welded, the former is not beneficial to standardization and automation when corresponding to different leading-out end structures, and the latter is complex in processing technology and high in cost; 3. at present, electromagnetic systems of relays of the application category are all monostable, and the actuation state is kept to be continuously excited, so that the power consumption is large and the environment is not protected; 4. the power-on indicator lamp module is usually connected with an electromagnetic system and is arranged outside the housing, and the power-on indicator lamp module is connected with the power-on indicator module by penetrating the housing through a conductor, but the integrity of the housing is damaged, the product cannot be designed into an airtight product, and the indicator lamp module can be assembled after the power-on indicator lamp module is arranged in the housing, so that the assembly is complicated.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provides an electromagnetic relay which can realize direct insertion positioning of a yoke and accurate and non-deviation positioning of the yoke.

In order to achieve the purpose, the invention adopts the following technical scheme:

an electromagnetic relay comprises a base component, a transmission component and an electromagnetic system, wherein the electromagnetic system comprises an elastic component, a yoke and an armature, the armature is connected with the transmission component and can drive the transmission component to drive a movable reed component of the base component, and the elastic component is connected between the transmission component and the yoke; the elastic piece comprises a counter-force elastic piece, a U-shaped connecting piece and two U-shaped fixing pieces, the bottom end of the counter-force elastic piece is connected with the transmission piece, the bottom end of the middle section of the U-shaped connecting piece is connected with the top end of the counter-force elastic piece, two arm ends of the U-shaped connecting piece are respectively and vertically connected with one arm end of each U-shaped fixing piece, the two U-shaped fixing pieces are symmetrically arranged in a mode that the openings are opposite, and the openings of the two U-shaped fixing pieces are used for being connected with two side edges of the yoke in a clamping mode.

Preferably, the top end of the middle section of the U-shaped connecting piece is provided with a pressing piece for limiting the armature.

Preferably, the bottom ends of the middle sections of the two U-shaped fixing pieces are respectively provided with a lower limiting piece for clamping a yoke, and the top ends of the middle sections of the two U-shaped fixing pieces are respectively provided with an upper limiting piece for limiting the yoke and the armature.

Preferably, the pressing sheet is an L-shaped sheet structure with an opening back to the armature and arranged obliquely; the lower limiting pieces are arc pieces, the lower limiting pieces of the two U-shaped fixing pieces are symmetrically arranged in a mode that the convex parts are opposite and the notches are back to back, and the two lower limiting pieces are matched for clamping the yoke.

Preferably, the upper limiting pieces of the two U-shaped fixing pieces are symmetrically arranged, each upper limiting piece comprises a stopping portion for positioning the yoke, a clamping portion for limiting the armature and a pressing portion, the clamping portion is vertically arranged, the stopping portions are horizontally arranged and vertically connected between the top end of the U-shaped fixing piece and the bottom end of the clamping portion, the pressing portions are connected to the top end of the clamping portion, and the pressing portions of the two upper limiting pieces are symmetrically arranged in a mode that the convex portions are opposite and the notches are back to back.

Preferably, the electromagnetic system further comprises a coil frame, an iron core and a magnet, the iron core is mounted on the coil frame, the magnet is connected between the bottom end of the iron core and one end of the yoke, the other end of the yoke is clamped with the elastic piece, one end of the armature is swingably mounted on the coil frame and corresponds to the top end of the iron core, and the other end of the armature penetrates through the elastic piece and is connected with the transmission piece.

Preferably, the electromagnetic system further comprises a coil frame, an iron core and a magnet, wherein the iron core is mounted on the coil frame, the magnet is connected between the bottom end of the iron core and one end of a yoke, the other end of the yoke is clamped with the elastic piece, one end of the armature is swingably mounted on the coil frame and corresponds to the top end of the iron core, and the other end of the armature penetrates through the elastic piece and is connected with the transmission piece; the coil rack comprises a bottom mounting block at the bottom, a mounting column in the middle and a top mounting block at the top, the yoke is L-shaped and comprises a first section and a second section, the first section of the yoke is inserted into the bottom mounting block and is attached to the bottom surface of the magnet, and the second section of the yoke is connected with the elastic element; the armature is L-shaped and comprises a third section and a fourth section, the third section of the armature is arranged on the top mounting block in a swinging mode and is limited by the elastic piece to abut against a yoke iron knife edge on the second section of the yoke iron, the fourth section of the armature penetrates through the elastic piece to be connected with the transmission piece, and the fourth section is located between the elastic piece and the second section of the yoke iron; the second section of the yoke iron is clamped by the U-shaped fixing plate after being inserted into the elastic piece, and is fixed by the lower limiting plate of the U-shaped fixing plate and positioned by the stopping part of the limiting plate on the U-shaped fixing plate; the armature is pressed into the lower part of a pressing sheet arranged on the elastic piece, the armature is limited on a yoke knife edge through the pressing sheet, and the armature is limited to move transversely on the yoke through a limiting sheet arranged on the elastic piece.

Preferably, the electromagnetic system further comprises a coil rack, a coil, an indicator lamp module and two connecting columns, wherein two mounting bosses located at two corners are arranged at the top of the coil rack, the connecting columns are inserted into through holes of the mounting bosses, the coil is sleeved in the middle of the coil rack, and the head end and the tail end of the coil are electrically connected with the connecting columns; the indicating lamp module is arranged on the two mounting bosses and is welded and fixed with the two connecting columns, and electricity is taken from the coil through the two connecting columns.

Preferably, the electromagnetic system further comprises a coil frame, a coil and an insert, wherein the coil is mounted on the coil frame, and the head end and the tail end of the coil are connected on the insert; the inserted sheet is installed in the first cavity of coil former, and the inserted sheet includes inserted sheet body and clamping piece, the one end of clamping piece is connected on the inserted sheet body, the other end perk of clamping piece, and the centre gripping lateral wall of first cavity one side between form the socket that is used for connecting the base subassembly lead-out end.

Preferably, the plug-in sheet also comprises a lug, a fixing bulge and a bending sheet which are arranged on the plug-in sheet body, the plug-in sheet body is T-shaped, the lug is projected from one end of a cross arm of the T-shaped plug-in sheet body to a vertical arm part, and the fixing bulge is arranged at the other end of the cross arm of the plug-in sheet body; the vertical arm of the insert body is connected with one end of the clamping piece, and the other end of the clamping piece is tilted and protrudes out of the insert body; one end of the bending piece is connected to the bottom end of the vertical arm of the insertion piece body, the other end of the bending piece is tilted, and the tilting direction is opposite to that of the clamping piece.

Preferably, be equipped with the movable hole that can supply the clamping piece activity on the inserted sheet body, the movable hole is square through-hole, and the one end of clamping piece is connected on the diapire in inserted sheet body movable hole, and the other end of clamping piece can be in the swing of movable hole.

Preferably, the clamping piece passes through J-shaped connection piece and this body coupling of inserted sheet, and the one end parallel and level of J-shaped connection piece is connected on the side of inserted sheet body, and the other end of J-shaped connection piece is connected with the clamping piece with the parallel looks interval of inserted sheet body and its base.

According to the electromagnetic relay, the counter-force elastic sheet of the elastic piece is connected with the transmission piece to provide counter-force for the transmission piece, the U-shaped fixing piece is used for clamping and fixing the yoke iron, and the U-shaped connecting piece integrates the counter-force elastic sheet and the U-shaped fixing piece into a whole.

In addition, the magnet is arranged in the magnetic loop of the electromagnetic system, the attraction state is kept without continuously exciting, the two poles of the magnet polarize the iron core and the yoke iron respectively, a magnetic keeping structure is formed through the polarity change of the coil excitation, the non-excitation state keeping of the electromagnetic system is completed by utilizing the reversal of the polarity of the magnet and the polarity of the coil, and the electromagnetic system is energy-saving and environment-friendly.

The indicator light module is directly arranged in the housing and is directly connected with the housing through a coil connecting column arranged on a coil rack of the electromagnetic system. The integrity of the housing is guaranteed, the product can be designed to be an airtight product, the product assembly is simplified, and the production efficiency is improved.

A socket for connecting the leading-out end is formed between the clamping piece of the inserting piece and the side wall of the cavity of the coil rack, so that a connection mode of quick insertion is realized, the inserting piece can be directly and quickly inserted into leading-out wires with different shapes, the realization of standardized and automatic production is facilitated, the processing technology is simple, and the cost is lower.

Drawings

Fig. 1 is an exploded perspective view of an electromagnetic relay according to the present invention;

FIG. 2 is a perspective view of the base assembly of the present invention;

FIG. 3 is a front view of the base assembly of the present invention;

FIG. 4 is a perspective view of the spring of the present invention;

FIG. 5 is a front view of the spring of the present invention;

FIG. 6 is a schematic structural diagram of a first embodiment of an insert of the present invention;

FIG. 7 is a schematic structural diagram of a second embodiment of an insert of the present invention;

FIG. 8 is a perspective view of an electromagnetic system of the present invention;

FIG. 9 is a half-sectional view of the electromagnetic system of the present invention;

fig. 10 is a perspective view of the bobbin of the present invention;

FIG. 11 is an assembly view of an electromagnetic system and an insert according to an embodiment of the present invention;

FIG. 12 is an assembly view of an electromagnetic system and a second insert of an embodiment of the present invention;

FIG. 13 is a perspective view of the housing of the present invention;

FIG. 14 is a half-sectional view of the housing of the present invention;

FIG. 15 is a perspective view of the gusset of the present invention;

FIG. 16 is a perspective view of the test switch of the present invention;

FIG. 17 is a side view of the test switch of the present invention;

FIG. 18 is a bottom view of the test switch of the present invention;

fig. 19 is a sectional view of the electromagnetic relay in the unlocked state of the present invention;

fig. 20 is a perspective view of the electromagnetic relay in the unlocked state of the present invention;

fig. 21 is a cross-sectional view of an electromagnetic relay in a test state of the invention;

fig. 22 is a perspective view of an electromagnetic relay in a test state of the present invention;

fig. 23 is a cross-sectional view of the electromagnetic relay in the latched state of the invention;

fig. 24 is a perspective view of the electromagnetic relay in the latched state of the invention;

FIG. 25 is a perspective view of a transmission of the present invention;

FIG. 26 is a side view of a transmission of the present invention;

FIG. 27 is a half sectional view of the electromagnetic relay in the forward energized state of the present invention;

fig. 28 is a half-sectional view of the electromagnetic relay in the reverse energization state of the present invention.

Detailed Description

The following describes an embodiment of the electromagnetic relay according to the present invention with reference to the embodiments shown in fig. 1 to 28. The electromagnetic relay of the present invention is not limited to the description of the following embodiments.

As shown in fig. 1, the electromagnetic relay of the present invention includes a base assembly 1, a transmission member 2, an electromagnetic system 3, and a cover assembly 4. As shown in fig. 2 and 3, the base assembly 1 of the present invention includes a base 11, a movable spring assembly 12 mounted on the base 11, a stationary spring assembly 13, and a terminal 14. The top surface of one end of base 11 is equipped with installation cavity 111 for installing electromagnetic system 3, is connected with on the bottom surface and draws forth end 14, installs movable reed subassembly 12 and static reed subassembly 13 on the other end of base 11. A rotating shaft bayonet 112 for swinging installation of the transmission piece 2 is arranged on the middle part of the base 11. As shown in fig. 1, the electromagnetic system 3, the base assembly 1 and the transmission 2 are mounted in the housing assembly 4. The electromagnetic system 3 is installed in the installation cavity 111 of the base 11, and the transmission piece 2 is installed on the base 11 in a swinging mode and located between the static reed assembly 13 and the electromagnetic system 3. The base component 1 assembled with the electromagnetic system 3 and the transmission piece 2 is arranged in the housing component 4, and the base component is subjected to point gluing and sealing in a glue groove at the bottom of the base 11 after being vacuumized and filled with nitrogen.

As shown in fig. 2 and 3, the movable spring assembly 12 includes a movable spring 121 and two movable contacts 122, one end of the movable spring 121 is fixed on the base 11, two symmetrical movable contacts 122 are disposed on two sides of the other end, and a first avoiding opening 1210 for avoiding the driving member 2 is disposed in the middle of the movable spring 121. Static spring assembly 13 includes first static spring 130, second static spring 131, normally closed contact 132 and normally open contact 133, and first static spring 130, second static spring 131 are located the both sides of movable spring 121 on fixed mounting base 11, and wherein first static spring 130 is close to driving medium 2. The middle part of the first stationary spring leaf 130 is provided with a second avoidance port 1300 for avoiding the transmission member 2, and the second avoidance port 1300 corresponds to the first avoidance port 1210. The first stationary spring 130 is provided with a normally closed contact 132 corresponding to one movable contact 122, and the second stationary spring 131 is provided with a normally open contact 133 corresponding to the other movable contact 122.

As shown in fig. 8 and 9, the electromagnetic system 3 of the present invention includes a coil bobbin 30, an insert 31, a coil 310, an elastic member 32, a core 33, a short circuit ring 34, a yoke 35, an armature 36, a magnet 37, two connection posts 38, and an indicator light module 39.

As shown in fig. 4 and 5, the elastic member 32 of the present invention is an integrally formed structure made of elastic metal, and includes a reaction spring 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. The bottom of reaction shell fragment 321 is equipped with the joint mouth 3210 that is used for being connected with driving medium 2, and reaction shell fragment 321 provides the counter-force with driving medium 2 joint. The bottom end of the middle section of the U-shaped connecting sheet 322 is connected with the top end of the reaction elastic sheet 321, the top end of the middle section of the U-shaped connecting sheet 322 is provided with a pressing sheet 324 for limiting the armature 36, the pressing sheet 324 is an L-shaped sheet structure with an opening back to the armature 36 and obliquely arranged, the number of the pressing sheets 324 is preferably more than or equal to two, the pressing sheets 324 are uniformly arranged at the top end of the middle section of the U-shaped connecting sheet 322, and the bent part of the armature 36 is elastically pressed for limiting after the armature 36 is assembled. Two arm ends of the U-shaped connecting piece 322 are respectively connected with one arm end of the U-shaped fixing piece 323 vertically, the two U-shaped fixing pieces 323 are symmetrically arranged in a mode of opposite openings, and the openings of the two U-shaped fixing pieces 323 are used for clamping two side edges of the yoke 35. The top ends of the middle sections of the two U-shaped fixing plates 323 are provided with upper limiting plates 325, and the bottom ends of the two U-shaped fixing plates are provided with lower limiting plates 326. The lower limiting pieces 326 are circular arc pieces, and the two lower limiting pieces 326 are symmetrically arranged in a way that the convex parts are opposite and the concave parts are back to back, and the lower limiting pieces 326 of the two U-shaped fixing pieces 323 are matched for clamping the yoke 35. The two upper limiting sheets 325 are symmetrically arranged, the upper limiting sheets 325 are of an integrally formed structure and comprise a stopping portion 3251, a clamping portion 3252 and a pressing portion 3253 which are sequentially connected, the clamping portion 3252 is vertically arranged, and the clamping portions 3252 of the two upper limiting sheets 325 are matched for clamping the armature 36; the stopping part 3251 is horizontally arranged, and the stopping part 3251 is vertically connected between the top end of the U-shaped fixing plate 323 and the bottom end of the clamping part 3252 and used for positioning the yoke 35; the pressing portions 3253 are 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 in a manner that the convex portions are opposite and the concave openings are back to back, and are used for pressing the armature 36 to limit the armature 36. According to the electromagnetic relay, the counter-force elastic sheet of the elastic piece is connected with the transmission piece to provide counter-force for the transmission piece, the U-shaped fixing piece is used for clamping and fixing the yoke iron, and the U-shaped connecting piece integrates the counter-force elastic sheet and the U-shaped fixing piece into a whole. The arrangement of two lower limiting pieces of the elastic element further limits and fixes the yoke, and the stability and the firmness of the positioning and fixing of the elastic element to the yoke are improved. The elastic piece has elastic preforming and last spacing piece and is used for playing limiting displacement to armature, to armature except that the rotation position homoenergetic once only accomplish the location, need not riveting, welding, and the location is better.

As shown in fig. 6 and 7, the insert 31 of the present invention includes an insert body 311, and a clamping piece 312, a lug 313, a fixing protrusion 314 and a bending piece 315 which are arranged on the insert body 311, wherein the insert body 311 is T-shaped, a protruding vertical arm part at one end of a cross arm of the T-shaped insert body 311 is the lug 313, the fixing protrusion 314 is arranged on a side wall at the other end of the cross arm of the insert body 311, and the fixing protrusion 314 is of a wedge-shaped sheet structure; the vertical arm of the insert body 311 is connected with one end of the clamping piece 312, and the other end of the clamping piece 312 is tilted to protrude out of the insert body 311; one end of the bending piece 315 is connected to the bottom end of the vertical arm of the insertion piece body 311, and the other end of the bending piece 315 is tilted in a direction opposite to the tilting direction of the clamping piece 312. As shown in fig. 6, in the first embodiment of the insert 31 of the present invention, a vertical arm of the insert body 311 is provided with a movable hole 316 for moving the clip 312, the movable hole 316 is a square through hole, one end of the clip 312 is connected to a 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. As shown in fig. 7, in the second embodiment of the insert 31 of the present invention, the clip 312 is connected to the vertical arm of the insert body 311 through a J-shaped connecting piece 317, one end of the J-shaped connecting piece 317 is connected to the side edge of the vertical arm of the insert body 311 in a flush manner, the other end of the J-shaped connecting piece 317 is spaced from the vertical arm of the insert body 311 in a parallel manner, and the bottom edge thereof is connected to the clip 312; in the present embodiment, the bending pieces 315 and the clamping pieces 312 are symmetrically arranged in a manner that the root interval is smaller than the end interval.

As shown in fig. 10, the bobbin 30 of the present invention includes a bottom mounting block 301 at the bottom, a mounting post 302 in the middle, and a top mounting block 303 at the top. The inserting sheet 31 is inserted into the first cavity 306 of the bottom mounting block 301 and is matched with the side wall of the first cavity 306 to form a socket capable of being quickly inserted, enameled wires are wound on the mounting column 302 to form a coil 310, and the head end and the tail end of the coil 310 are connected to the inserting sheet 31. As shown in fig. 11 and 12, a first cavity 306 for installing the insertion sheet 31 is disposed on the bottom installation block 301 of the coil former 30, one side wall of the first cavity 306 is a fixed side wall 307, the other side wall is a clamping side wall 308, a limit inclined surface 309 matched with the bending sheet 315 is disposed on the fixed side wall 307 of the first cavity 306, the insertion sheet 31 is inserted into the first cavity 306, the insertion sheet 31 is attached to the fixed side wall 307 of the first cavity 306, the bending sheet 315 of the insertion sheet 31 is matched with the limit inclined surface 309 to limit the insertion sheet 31, a fixing protrusion 314 of the insertion sheet 31 is present, the insertion sheet 31 is fixed with the first cavity 306 in an interference fit manner, a socket for connecting the leading-out end 14 of the base component 1 is disposed between the clamping sheet 312 of the insertion sheet 31 and the clamping side wall 308, so as to realize a quick insertion connection manner, and be directly and quickly inserted with leading-out ends of different shapes, thereby facilitating to realize standardization and automation production, the processing technology is simple and the cost is low. The bottom mounting block 301 of the coil rack 30 has two first chambers 306, the two first chambers 306 are symmetrically arranged, accordingly, the number of the inserting pieces 31 and the leading-out ends 14 is two, one inserting piece 31 is mounted in each first chamber 306, the two inserting pieces 31 are connected with the two leading-out ends 14 in a one-to-one correspondence manner, one end of each leading-out end 14 is used for being connected with an external power supply outside the electromagnetic relay, and the other end of each leading-out end 14 extends into the mounting cavity 111 and can be inserted into a socket of the inserting piece 31.

As shown in fig. 8-10, the coil bobbin 30 is provided with an axial mounting hole 304, the axial mounting hole 304 extends through the top mounting block 303 and the mounting post 302 and extends to a second chamber communicating with the bottom mounting block 301, and the core 33 is fitted into the axial mounting hole 304. The magnet 37 is inserted into the second cavity of the bottom mounting block 301 and connected with the bottom end of the iron core 33; the yoke 35 is L-shaped and comprises a first section 351 and a second section 352, the first section 351 of the yoke 35 is inserted into the second cavity of the bottom mounting block 301 and is attached to the bottom surface of the magnet 37, and the second section 352 of the yoke 35 is connected with the elastic element 32; the electromagnetic relay is designed as a magnetic latching relay, and the two poles of the magnet 37 polarize the iron core 33 and the yoke 35, respectively, and the magnetic latching structure is formed by the polarity change of the excitation of the coil 310. The magnet is arranged in the magnetic loop of the electromagnetic system, the attraction state is kept without continuously exciting, the iron core and the yoke are polarized by two poles of the magnet respectively, a magnetic keeping structure is formed by the polarity change of the coil excitation, the non-excitation state of the electromagnetic system is kept by utilizing the reversal of the polarity of the magnet and the polarity of the coil, and the electromagnetic system is energy-saving and environment-friendly. The shorting ring 34 fits over the top end of the core 33 and rests on the top mounting block 303. The armature 36 is L-like and includes a third segment 361 and a fourth segment 362, the third segment 361 of the armature 36 is swingably mounted on the top mounting block 303 above the short circuit ring 34 and is restrained by the elastic member 32 against the yoke blade on the second segment 352 of the yoke 35, the fourth segment 362 of the armature 36 passes through the elastic member 32 to be connected to the transmission member 2, and the fourth segment 362 is located between the U-shaped connecting piece 322 of the elastic member 32 and the second segment 352 of the yoke 35. When the installation is carried out, the second section 352 of the yoke 35 is inserted into the elastic piece 32 and then is 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 stopping part 3251 of the upper limiting piece 325 of the U-shaped fixing piece 323; the armature 36 is pressed into the lower part of a pressing sheet 324 arranged on the elastic piece 32, the armature 36 is limited on a yoke knife edge through the pressing sheet 324, the transverse movement of the armature 36 on the yoke 35 is limited through an upper limiting sheet 325 arranged on the elastic piece 32, the armature is clamped and fixed by clamping parts 3252 of the two upper limiting sheets 325, and the pressing parts 3253 of the two upper limiting sheets 325 are pressed and positioned.

As shown in fig. 8-10, the top mounting block 303 of the coil frame 30 is provided with two mounting bosses 305 located at two corners, and the two connecting posts 38 are mounted on the two mounting bosses 305 in a one-to-one correspondence. The connecting column 38 is inserted into the through hole of the mounting boss 305, the indicator light module 39 is arranged on the two mounting bosses 305 and is welded and fixed with the two connecting columns 38, and a semi-packaging 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 is composed of a circuit board, and an led, a resistor and other elements soldered on the circuit board, and it should be noted that the indicator light module 39 can emit light by powering on. When the product is in an alternating current specification, after the enameled wire is wound, the head end and the tail end of the coil 310 are connected with the lug 313 of the plug-in piece 31, a secondary winding is wound outside the coil 310, the head end and the tail end of the secondary winding of the coil 310 are connected with the connecting columns 38, and the indicating lamp module 39 can get electricity from the coil 310 through the two connecting columns 38 and the secondary winding of the coil 310; when the product is the direct current specification, coil 310 finishes the coiling back head end, terminal and is connected with inserted sheet 31, and spliced pole 38 extends to be connected with inserted sheet 31, realizes that pilot lamp module 39 gets electricity from coil 310 through two spliced poles 38, two inserted sheets 31. The indicator light module is directly arranged in the housing and is directly connected with the housing through a coil connecting column arranged on a coil rack of the electromagnetic system. The integrity of the housing is guaranteed, the product can be designed to be an airtight product, the product assembly is simplified, and the production efficiency is improved.

As shown in fig. 8 and 9, the working principle of the electromagnetic system 3 of the present invention is: the electromagnetic system 3 is matched with the plug-in sheet 31 through the leading-out terminal 14 to form a passage, the electromagnetic system 3 is electrified in the forward direction, after the iron core 33 in the middle of the coil rack 30 is magnetized and polarized, electromagnetic attraction is formed on the armature 36 polarized by the magnet 37, the third section 361 of the armature 36 is driven to be closed and kept towards the iron core 33, and the fourth section 362 of the armature 36 pushes the transmission piece 2. When the electromagnetic system 3 is energized in the reverse direction and the polarity of the polarization of the core 33 is reversed, an electromagnetic thrust is generated on the armature 36 polarized by the magnet 37, the third segment 361 of the armature 36 is driven to separate from the core 33 and hold it, and the fourth segment 362 of the armature 36 pulls back the transmission element 2. The iron core assembly formed by the short circuit ring 34 and the iron core 33 has a magnetic separation effect on alternating current, so that the electromagnetic attraction on the end face of the iron core 33 is not zero when the alternating current crosses zero. The connection post 38 is used for expressing the monitoring of the power-on state of the electromagnetic system 3 by lighting the indicator lamp module 39 by taking electricity from the head end and the tail end of the coil 310. As shown in FIG. 1, the housing assembly 4 of the present invention comprises a pinch plate 43, a housing 41 and a test switch 42. As shown in fig. 13, the housing 41 is transparent, the housing 41 is provided with a mounting groove 411 for mounting the buckle 43 and a sinking groove 412 for mounting the test switch 42, the mounting groove 411 is communicated with the sinking groove 412 and the outside of the housing 41, the sinking groove 412 is communicated with the mounting groove 411 and the inside of the housing 41, the side edge of the buckle 43 is provided with a fixing lug 431, and the side wall of the mounting groove 411 is provided with a fixing groove 413 matched with the fixing lug 431. As shown in fig. 15, the pinch plate 43 is provided with an operation port 432, a test port 433, an indicator window 434 and an operation indication window 435, the pinch plate 43 is a rectangular plate, the operation port 432, the test port 433 and the indicator window 434 are sequentially arranged at the middle position of the pinch plate 43 along the long side direction of the pinch plate 43, the number of the operation indication windows 435 is two, and the two operation indication windows 435 are symmetrically arranged at the two sides of the operation port 432.

As shown in fig. 13 and 14, the sinking groove 412 of the housing 41 is a convex groove, the wide side portion of the sinking groove 412 is attached to two side walls to form a supporting boss 414 for supporting the test switch 42, the two side walls of the wide side portion of the sinking groove 412 are sequentially provided with a fastening platform 415 and a gear protrusion 416 above the supporting boss 414, and the fastening platform 415 and the supporting boss 414 are spaced; a first locking part 417 and a second locking catch 418 are sequentially arranged between two side walls in the narrow side part of the sinking groove 412, the second locking catch 418 is arranged by being attached to the side wall at the tail end of the narrow side part of the sinking groove 412, and the end part of the second locking catch 418 is provided with a pressing inclined surface 419 matched with the pressing inclined surface 4215.

As shown in fig. 16 to 24, the test switch 42 is installed in the sinking groove 412 and has an unlocking position, a test position and a locking position when sliding along the sinking groove 412, and the test switch 42 is provided with a first locking portion 4211 engaged with the first locking portion 417 in the sinking groove 412 and an actuating portion 4210 engaged with the armature 36. When the test switch 42 slides to the unlock position, the first locking portion 4211 of the test switch 42 is locked with the first locking portion 417 so that the trigger portion 4210 of the test switch 42 cannot contact with the armature 36; when the test switch 42 is slid to the test position or the lock position, the first lock portion 417 and the first latch portion 4211 are unlocked. The electromagnetic relay has the function of preventing false touch, when the test switch 42 is in an unlocking state, the first locking part 4211 of the test switch 42 is buckled with the first locking part 417 of the housing 41, so that the test switch 42 is prevented from pressing the armature 36 downwards to cause false operation, unnecessary abnormal function caused by false operation is effectively avoided, and the reliability of a product is improved.

As shown in fig. 16-18, the test switch 42 of the present invention includes a slider 4201 and a spring piece 4209. The slider 4201 is in sliding fit with the side wall of the sinking groove 412, the slider 4201 is provided with a pushing boss 4208 located on the top, and anti-slip stripes are arranged on the top surface of the pushing boss 4208, so that an anti-slip effect is achieved, and the pushing boss 4208 can be conveniently pushed by manual operation. The push boss 4208 of the test switch 42 is located within the access opening 432 of the striker plate 43. The side wall of the slider 4201 is provided with a sliding protrusion 4202 and a gear spring 4203, the supporting boss 414 supports the slider 4201, and the sliding protrusion 4202 of the slider 4201 is clamped between the supporting boss 414 and the catch table 415 and can slide along the catch table 415 to realize the sliding fit of the slider 4201 and the side wall of the sinking groove 412. Two ends of gear spring 4203 are respectively connected to side walls of slider 4201, an unlocking groove 4204, a testing groove 4205 and a locking groove 4206 are sequentially arranged on an outer side surface of the middle of gear spring 4203, and gear protrusions 416 in counter sink 412 are matched with unlocking groove 4204, testing groove 4205 and locking groove 4206 to form an unlocking gear, a testing gear and a locking gear. The inner side surface of the middle part of gear spring 4203 is wavy, has a convex structure corresponding to unlocking groove 4204, testing groove 4205 and locking groove 4206, and has a movable gap 4207 with the side wall of slider 4201. The unlocking gear, the testing gear and the locking gear which are formed by matching the elastic groove of the testing switch 42 and the immovable protrusion of the housing 41 have simple structure, large resistance cannot be caused to the sliding of the testing switch 42, the testing switch 42 is manually pushed to be simple and labor-saving, and the gears formed at the same time are stable.

As shown in fig. 16-18, one end of the elastic strip 4209 is connected to the bottom surface of the slider 4201, the other end of the elastic strip 4209 is a movable end, the movable end is provided with a trigger 4210, a second locking portion 4212 and a testing platform 4213, one end of the second locking portion 4212 is connected to one end of the trigger 4210, and an adjustment gap 4214 is formed between the other ends of the second locking portion 4212 and the trigger 4210, so as to form a transverse 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 leftward to form a first locking portion 4211 which is flush with the right portion of the top end, and the test platform 4213 and the first locking portion 4211 form a T-shaped structure. Test groove 4205 is arranged on test platform 4213, and test groove 4205 faces test opening 433 when test switch 42 slides to a test gear.

As shown in fig. 16 to 18, the second locking part 4212 of the elastic piece 4209 has a pressure slant 4215, and the pressure slant 4215 is engaged with the pressure slant 419 in the sinking groove 412. When the test switch 42 is slid to the locking position, the pressing inclined surface 419 presses the pressed inclined surface 4215 of the elastic sheet 4209, so that the movable end of the elastic sheet 4209 moves downward, and the trigger 4210 on the movable end moves downward to contact with the armature 36, and the second locking portion 4212 is locked with the second locking catch 418. An adjustment gap 4214 is formed between the second locking portion 4212 and the trigger portion 4210. By adjusting the presence of the gap 4214, it may be achieved that the effect of the interference fit of the test switch 42 with the armature 36 is reduced by elastic deformation of the elastomeric fins 4209.

As shown in fig. 19 to 20, when the test switch 42 is in the unlocked state, that is, when the shift protrusion 416 is snapped into the unlocking groove 4204, the first locking portion 4211 of the test switch 42 is snapped with the first locking portion 417 of the housing 41, so as to lock the test switch 42, at this time, the touching portion 4210 of the test switch 42 cannot press the armature 36 to interfere with the armature 36, and the product can freely move through energization and excitation of the electromagnetic system 3, so as to prevent the false operation of the test switch 42, which may cause false operation of the product. As shown in fig. 21-22, when the test switch 42 slides to the test state, that is, the shift protrusion 416 is engaged into the test groove 4205, the first locking portion 4211 of the test switch 42 is separated from the first locking portion 417 of the housing 41, at this time, the trigger portion 4210 is in critical contact with the armature 36, at this time, a click test can be performed through the test port 433 provided on the buckle 43, that is, the test groove 4205 is operated by a tool to press the test platform 4213, the trigger portion 4210 moves downward to contact with the armature 36, and drives the transmission member 2 to drive the movable spring member 12 to move, so as to switch the contact state, and after the test is completed and the pressing force on the test platform 4213 is removed, the trigger portion 4210 returns to be in critical contact with the armature 36. As shown in fig. 23-24, when the test switch 42 further slides to the latching state, the pressed inclined surface 4215 of the elastic piece 4209 of the test switch 42 slides along the pressed inclined surface 419 of the housing 41 to press the elastic piece 4209 downward, the triggering portion 4210 of the elastic piece 4209 presses the armature 36, and drives the transmission member 2 to drive the moving reed assembly 12 to move, and finally the second locking portion 4212 is locked below the second locking catch 418 of the housing 41, and at this time, the triggering portion 4210 cannot move up and return, and keeps pressing the armature 36, so that the contact state of the locking contacts is achieved, and the shift knob 416 remains locked in the locking recess 4206. Through the above structural design, the test switch only needs to form all functions of unlocking, testing and locking by matching with the housing through one structural part, three switch states are not interfered with each other, the occurrence of misoperation is effectively prevented, and the assembly is simple and the cost is lower.

As shown in fig. 25-28, the elastic member 32 is connected between the yoke 35 and the transmission member 2, the armature 36 is connected with the transmission member 2, the transmission member 2 can be driven to drive the movable spring element 12 of the base member 1, the transmission member 2 is mounted on the base 11, and the transmission member 2 can swing or move relative to the base 11. The transmission member 2 includes a push rod 202 and a pull-back hook 203 provided in correspondence with the movable reed assembly 12. As shown in fig. 27, when the electromagnetic system 3 of the electromagnetic relay is energized in the forward direction, the armature 36 is driven by the electromagnetic system 3 to move and further push the transmission member 2, the elastic member 32 is elastically deformed, and meanwhile, the push rod 202 of the transmission member 2 pushes the movable spring 12 to close the normally open contact 133/open the normally closed contact 132 of the stationary spring assembly 13, and when the electromagnetic relay is de-energized and de-energized, the movable spring 12 is kept to close the normally open contact 133/open the normally closed contact 132 of the stationary spring assembly 13. As shown in fig. 28, when the electromagnetic system 3 of the electromagnetic relay is energized in the reverse direction, the armature 36 is driven to move in the reverse direction, the elastic member 32 recovers deformation, the pulling force of the armature 36 and the deformation force of the elastic member 32 act together to pull back the transmission member 2, and the pulling-back hook 203 of the transmission member 2 pulls the movable spring member 12 to open the normally open contact 133/close the normally closed contact 132 of the stationary spring member 13, and when the electromagnetic relay is de-energized and de-energized, the movable spring member 12 is kept to open the normally open contact 133/close the normally closed contact 132 of the stationary spring member 13. According to the transmission structure of the electromagnetic relay, the transmission piece 2, the elastic piece 32 and the yoke 35 are matched with each other, the push rod 202 and the pull-back hook 203 of the transmission piece 2 are matched with the movable reed component 12, bidirectional transmission is achieved, the transmission piece 2 can not only push the movable reed component 12 to close the normally open contact 133, but also pull the movable reed component 12 to close the normally closed contact 132, the problems that normally closed pressure is relatively small and working reliability is insufficient due to the fact that pressure is generated only through elasticity of the movable reed 121 in the prior art are effectively solved, and reliability of products is improved.

As shown in fig. 25, one end of the transmission member 2 is integrally provided with an operation indication piece 205, the operation indication piece 205 is disposed corresponding to an operation indication window 435 on the buckle plate 43, the other end of the transmission member 2 is integrally provided with a rotating shaft 206, the rotating shaft 206 is engaged with the rotating shaft bayonet 112 of the base 11, and the rotating shaft 206 of the transmission member 2 is installed in the rotating shaft bayonet 112 to realize that the transmission member 2 is swingably installed on the base 11 with the rotating shaft 206 as a fulcrum. As shown in fig. 27, when the electromagnetic relay is in the forward direction, the operation indication piece 205 faces the operation indication window 435, and the operation indication piece 205 is visible through the operation indication window 435 from the outside of the housing 41. As shown in fig. 28, when the electromagnetic relay is in the reverse energization state, the operation indication piece 205 is misaligned with the operation indication window 435, and the operation indication piece 205 cannot be seen through the operation indication window 435 from the outside of the housing 41. The transmission piece 2 is integrated with the action indicating sheet 205, so that the hinge connection between the action indicating piece and the transmission piece is eliminated, parts are reduced, and the assembly complexity is reduced. The action indication is changed from traditional translation into swing, so that the working stroke is increased, and the effective identification of a client is facilitated.

As shown in fig. 25 to 26, in a specific embodiment, the transmission member 2 of the present invention is an integrally formed structure, and includes a sheet-shaped H-shaped body 201, a push rod 202, a pull-back hook 203, a fixed block 204, an action indicating plate 205 and a rotating shaft 206, wherein the push rod 202 is a square strip, and a width of a first escape opening 1210 of the movable spring piece 121 < a width of the push rod 202 < a width of a second escape opening 1300 of the first stationary spring piece 130. Two vertical arm top ends of H type body 201 extend towards electromagnetic system 3 and form two action indicator 205, and two vertical arm bottom ends of H type body 201 all are equipped with pivot 206, and pivot 206 cooperatees with pivot bayonet 112 of base 11, and H type body 201 can swing through pivot 206 and install on base 11 and lie in between stationary reed subassembly 13 and electromagnetic system 3. Longitudinal reinforcing ribs 209 are arranged on two vertical arms of the H-shaped body 201, and firmness of the transmission structure is improved. A side face of the cross arm of the H-shaped body 201, namely the side face opposite to the electromagnetic system 3, is provided with a clamping block 207 and a fixed block 204 which are connected in sequence, and the other side face of the cross arm of the H-shaped body 201 is provided with a push rod 202 and a pull-back hook 203 which are connected in sequence. The clip block 207 is matched with the clip interface 3210 of the elastic element 32 for clipping the elastic element 32. An armature clamping groove 208 for clamping the armature 36 is arranged on the fixed block 204. The pull-back hook 203 is in a transverse T-shaped structure, the narrow end of the pull-back hook 203 is connected with the end part of the push rod 202, the wide end of the T-shaped pull-back hook 203 is provided with two protruding hook parts 2030, and the height of the first avoidance opening 1210 of the movable spring leaf 121 is less than the height of the wide end of the pull-back hook 203 and less than the height of the second avoidance opening 1300 of the first stationary spring leaf 130. The end of the hook 2030 of the retracting hook 203 is provided with an avoiding inclined surface 2031 for avoiding the movable spring 121, and the avoiding inclined surface 2031 is consistent with the swing amplitude of the transmission member 2. When the retracting hook 203 of the electromagnetic relay reverse electrification transmission piece 2 retracts, due to the fulcrum action of the rotating shaft 206 arranged on the transmission piece 2, the hook portion 2030 of the transmission piece 2 tilts along with the electromagnetic relay reverse electrification transmission piece, the angle of the retracting inclined surface 2031 arranged on the hook portion 2030 is consistent with the angle of the transmission piece 2 after swinging, so that the matching between the hook portion 2030 and the movable reed 121 is ensured to be relatively parallel, and the stability and the reliability of the movable reed 121 pulled by the hook portion 2030 are improved conveniently. The sheet structure of the transmission part 2 is simple and light, improves the transmission sensitivity, reduces the occupied space, and is beneficial to the reasonable, compact and orderly overall structure layout of the product.

As shown in fig. 27-28, the elastic member 32 is clamped to the clamping block 207 of the transmission member 2 through the clamping interface 3210 on the elastic member, the end of the armature 36 is clamped to the armature clamping groove 208 of the transmission member 2, and the transmission member and the armature are clamped in the clamping groove instead of the conventional lapping mode, so that the phenomena of transmission clamping stagnation, separation and the like are avoided. The rotating shaft 206 of the transmission member 2 is installed in the rotating shaft bayonet 112 of the base 11, and the push rod 202 of the transmission member 2 passes through the second escape opening 1300 of the first stationary spring leaf 130 and can be stopped by the movable spring leaf 121 without passing through the first escape opening 1210 of the movable spring leaf 121. The retracting hook 203 sequentially passes through the second avoiding opening 1300 of the first fixed spring piece 130 and the first avoiding opening 1210 of the movable spring piece 121, the hook portion 2030 of the retracting hook 203 can hook the movable spring piece 121, so that the retracting hook 203 can not reversely pass through the first avoiding opening 1210, the hook portion 2030 of the retracting hook 203 hooks the movable spring piece 121 when the retracting hook moves in the reverse direction of the passing direction, and the retracting hook 203 can synchronously drive the movable spring piece 121.

The foregoing is a more detailed description of the invention in connection with specific preferred embodiments and it is not intended that the invention be limited to these specific details. For those skilled in the art to which the invention pertains, several simple deductions or substitutions can be made without departing from the spirit of the invention, and all shall be considered as belonging to the protection scope of the invention.

Claims

1. An electromagnetic relay comprises a base component (1), a transmission piece (2) and an electromagnetic system (3), wherein the electromagnetic system (3) comprises an elastic piece (32), a yoke (35) and an armature (36), the armature (36) is connected with the transmission piece (2) and can drive the transmission piece (2) to further drive a movable reed component (12) of the base component (1), and the elastic piece (32) is connected between the transmission piece (2) and the yoke (35);

the method is characterized in that: elastic component (32) are including reaction shell fragment (321), U-shaped connection piece (322) and two U-shaped stationary blade (323), the bottom and the driving medium (2) of reaction shell fragment (321) are connected, the middle section bottom and the top of reaction shell fragment (321) of U-shaped connection piece (322) are connected, and two arm tip of U-shaped connection piece (322) are connected with the arm end of U-shaped stationary blade (323) is perpendicular respectively, and two U-shaped stationary blade (323) are the symmetry with the mode that the opening is relative and set up, and the opening of two U-shaped stationary blades (323) is used for the both sides limit of joint yoke (35).

2. An electromagnetic relay according to claim 1, characterized in that: and the top end of the middle section of the U-shaped connecting sheet (322) is provided with a pressing sheet (324) for limiting the armature (36).

3. An electromagnetic relay according to claim 2, characterized in that: the lower limiting piece (326) used for clamping the yoke iron (35) is arranged at the bottom end of the middle section of each U-shaped fixing piece (323), and the upper limiting piece (325) of each limiting yoke iron (35) and the armature iron (36) is arranged at the top end of the middle section of each U-shaped fixing piece (323).

4. An electromagnetic relay according to claim 3, characterized in that: the pressing sheet (324) is of an L-shaped sheet structure with an opening back to the armature (36) and arranged obliquely; the lower limiting pieces (326) are arc pieces, the lower limiting pieces (326) of the two U-shaped fixing pieces (323) are symmetrically arranged in a mode that the convex parts are opposite and the concave openings are back to back, and the two lower limiting pieces (326) are matched for clamping the yoke (35).

5. An electromagnetic relay according to claim 3, characterized in that: the upper limiting sheets (325) of the two U-shaped fixing sheets (323) are symmetrically arranged, the upper limiting sheets (325) comprise stopping portions (3251) used for positioning the yoke (35), clamping portions (3252) used for limiting the armature (36) and pressing portions (3253), the clamping portions (3252) are vertically arranged, the stopping portions (3251) are horizontally arranged and vertically connected between the top end of the U-shaped fixing sheet (323) and the bottom end of the clamping portions (3252), the pressing portions (3253) are connected to the top end of the clamping portions (3252), and the pressing portions (3253) of the two upper limiting sheets (325) are symmetrically arranged in a mode that convex portions are opposite and notches are back to back.

6. An electromagnetic relay according to any one of claims 1-5, characterized in that: the electromagnetic system (3) further comprises a coil rack (30), an iron core (33) and a magnet (37), the iron core (33) is installed on the coil rack (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 connected with an elastic piece (32) in a clamping mode, one end of an armature (36) is installed on the coil rack (30) in a swinging mode and corresponds to the top end of the iron core (33), and the other end of the armature (36) penetrates through the elastic piece (32) to be connected with the transmission piece (2).

7. An electromagnetic relay according to claim 5, characterized in that: the electromagnetic system (3) further comprises a coil rack (30), an iron core (33) and a magnet (37), the iron core (33) is installed on the coil rack (30), the magnet (37) is connected between the bottom end of the iron core (33) and one end of a yoke iron (35), the other end of the yoke iron (35) is clamped with an elastic piece (32), one end of an armature (36) is installed on the coil rack (30) in a swinging mode and corresponds to the top end of the iron core (33), and the other end of the armature (36) penetrates through the elastic piece (32) to be connected with the transmission piece (2); the coil rack (30) comprises a bottom mounting block (301) at the bottom, a mounting column (302) at the middle and a top mounting block (303) at the top, the yoke (35) is L-shaped and comprises 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 attached to the bottom surface of the magnet (37), and the second section (352) of the yoke (35) is connected with the elastic piece (32); the armature (36) is L-shaped and comprises a third section (361) and a fourth section (362), the third section (361) of the armature (36) is arranged on the top mounting block (303) in a swinging mode and is limited by the elastic piece (32) to abut against a yoke iron knife edge on the second section (352) of the yoke iron (35), the fourth section (362) of the armature (36) penetrates through the elastic piece (32) to be connected with the transmission piece (2), and the fourth section (362) is located between the elastic piece (32) and the second section (352) of the yoke iron (35); the second section (352) of the yoke (35) is inserted into the elastic piece (32) and then clamped 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 stopping part (3251) of the upper limiting piece (325) of the U-shaped fixing piece (323); the armature (36) is pressed into the lower part of a pressing sheet (324) arranged on the elastic piece (32), the armature (36) is limited on a yoke knife edge through the pressing sheet (324), and the transverse movement of the armature (36) on the yoke (35) is limited through an upper limiting sheet (325) arranged on the elastic piece (32).

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

9. An electromagnetic relay according to claim 1, characterized in that: the electromagnetic system (3) further comprises a coil rack (30), a coil (310) and an inserting sheet (31), wherein the coil (310) is installed on the coil rack (30), and the head end and the tail end of the coil (310) are connected to the inserting sheet (31); the inserted sheet (31) is installed in first cavity (306) of coil former (30), and inserted sheet (31) includes inserted sheet body (311) and clamping piece (312), the one end of clamping piece (312) is connected on inserted sheet body (311), and the other end perk of clamping piece (312) forms the socket that is used for connecting leading out of end (14) of base subassembly (1) between centre gripping lateral wall (308) of first cavity (306) one side.

10. An electromagnetic relay according to claim 9, characterized in that: the inserting piece (31) further comprises a lug (313), a fixing protrusion (314) and a bending piece (315) which are arranged on the inserting piece body (311), the inserting piece body (311) is T-shaped, a protruding vertical arm part at one end of a cross arm of the T-shaped inserting piece body (311) is the lug (313), and the fixing protrusion (314) is arranged at the other end of the cross arm of the inserting piece body (311); the vertical arm of the insertion piece body (311) is connected with one end of the clamping piece (312), and the other end of the clamping piece (312) is tilted and protrudes out of the insertion piece body (311); one end of the bending piece (315) is connected to the bottom end of the vertical arm of the inserting piece body (311), the other end of the bending piece (315) tilts, and the tilting direction is opposite to that of the clamping piece (312).

11. An electromagnetic relay according to claim 9, characterized in that: be equipped with movable hole (316) that can supply clamping piece (312) activity on inserted sheet body (311), movable hole (316) are square through hole, and the one end of clamping piece (312) is connected on the diapire of inserted sheet body (311) movable hole (316), and the other end of clamping piece (312) can swing in movable hole (316).

12. An electromagnetic relay according to claim 9, characterized in that: the clamping piece (312) is connected with the inserting piece body (311) through the J-shaped connecting piece (317), one end of the J-shaped connecting piece (317) is connected to the side edge of the inserting piece body (311) in a flush mode, and the other end of the J-shaped connecting piece (317) is parallel to the inserting piece body (311) at intervals and the bottom edge of the J-shaped connecting piece is connected with the clamping piece (312).