CN211294986U - Electromagnetic relay - Google Patents

Abstract

The utility model discloses an electromagnetic relay, which comprises a base, a housing, a coil, a movable spring and two static springs, wherein the housing is fixedly connected with the base, the coil is arranged between the base and the housing, the movable spring is provided with a plurality of movable contacts, each static spring comprises a plate-shaped base part, one part of one side of the plate-shaped base part extends outwards and is bent to form a static contact fixing part, a static contact is fixedly arranged on the static contact fixing part, and the base is provided with a abdicating through hole; the two static reeds are fixedly connected on the outer side surface of the base at intervals by utilizing the plate-shaped base parts respectively, each static contact fixing part extends into the space between the base and the housing through the abdicating through hole, and each static contact corresponds to one movable contact on the movable reed; the plate-like base portion on each stationary spring plate protrudes outside the housing to form a connecting portion. The utility model discloses better improve the stationary reed radiating effect, promote the relay performance, and simplified the preparation technology, reduced the cost of manufacture, prolonged the life of relay.

Description

Electromagnetic relay

Technical Field

The utility model belongs to the technical field of the relay manufacturing technology and specifically relates to an electromagnetic relay.

Background

An electromagnetic relay is an electronic control device having a control system (also called an input loop) and a controlled system (also called an output loop), and is generally applied to an automatic control circuit, and actually is an automatic switch for controlling a larger current and a higher voltage by using a smaller current and a lower voltage. Therefore, the circuit plays the roles of automatic regulation, safety protection, circuit conversion and the like.

An electromagnetic relay, particularly a clapping type relay, generally comprises a base, a housing, a coil, a movable spring and two static springs, wherein the housing is fixedly connected with the base, the coil is wound on a coil framework, the coil framework is fixedly connected with the base, an iron core is arranged in a central hole of the coil framework, a yoke is fixedly connected onto the coil framework, the middle of the movable spring is bent, one end of the movable spring is fixedly connected onto the yoke, the other end of the movable spring is fixedly connected with an armature, the armature corresponds to the iron core, the two static springs are fixedly connected with the base, and two static contacts on the two static springs correspond to two movable contacts on the movable spring. The existing electromagnetic relays with large power have the defects that the static reed is large in size and large in occupied space, the arrangement and fixation of the leading-out end of the static reed are convenient for reducing the occupied space, and the main body part of the static reed is usually integrated with a base in an injection molding mode. But the main part of static reed and base injection moulding are integrative, and it has the problem: 1. the heat dissipation of the static reed is poor, so that the performance of the relay is influenced; in particular, in the case of a large-current electromagnetic relay (e.g., a relay having a contact current of 200A or more), the heat generation amount Q is I²R t, the heat productivity is in direct proportion to the square value of the current, the heat productivity of the large-current relay is very large, and if the heat cannot be effectively and rapidly dissipated, the relay is easy to lose efficacy due to high temperature; 2. the injection molding process is complex, the reject ratio is high, and the preparation cost is high; 3. the contact of static reed returns the factory after having enough to meet the need supplier department mold insert injection molding again, and the turnover time is long and expose for a long time in the unclean space, and very easy contaminated also can influence relay quality and life.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to provide an electromagnetic relay, it has better improved static reed radiating effect, promotes the relay performance, and has simplified the preparation technology, has reduced the cost of manufacture, prolongs the life of relay.

In order to achieve the above purpose, the technical scheme of the utility model is that: an electromagnetic relay comprises a base, a housing, a coil, a movable spring and two static springs, wherein the housing is fixedly connected with the base, the coil is wound on a coil framework, the coil framework is fixedly connected with the base, the coil is positioned between the base and the housing, an iron core is arranged in a central hole of the coil, a yoke is fixedly connected on the coil framework, the movable spring is bent along the middle part, one end of the movable spring is fixedly connected on the yoke, the other end of the movable spring is fixedly connected with an armature, a plurality of movable contacts are also arranged at the other end of the movable spring, the armature corresponds to one end of the iron core, the other end of the iron core is connected with the yoke or is connected with the yoke through magnetic steel, each static spring comprises a plate-shaped base part, one part of one side of each plate-shaped base part extends outwards and is bent to form a static contact fixing part; the two static reeds are fixedly connected on the outer side surface of the base at intervals by utilizing the plate-shaped base parts respectively, each static contact fixing part extends into the space between the base and the housing through the abdicating through hole, and each static contact corresponds to one movable contact on the movable reed; the plate-like base portion on each stationary spring plate protrudes outside the housing to form a connecting portion.

In a further improvement, a part of three side surfaces of the plate-shaped base part on each static reed extends outwards and is bent to form a riveting fixing part, a plurality of corresponding riveting holes are formed in the base, and each riveting fixing part is matched with one riveting hole to enable the plate-shaped base part to be fixedly connected to the outer side surface of the base; the stationary contact fixing portion on each stationary spring plate is perpendicular to the plate-like base portion thereof. Therefore, the static reed can be conveniently and fixedly connected with the base in an assembling way, and the preparation efficiency is improved.

The improved movable spring plate is characterized in that an assembly area is arranged on one side, close to the other end of the movable spring plate, of the base, a rubber block is fixedly connected onto the assembly area, and the rubber block limits the rebound and reset moving distance of the other end of the movable spring plate and provides a buffering effect. Therefore, the noise generated by the rebound of the movable spring can be greatly reduced.

Preferably, the rubber block comprises a square block-shaped main body, the rear parts of the left side and the right side of the square block-shaped main body extend outwards in each direction to form a positioning convex part, the rubber block is positioned with the assembly area through the upper side surface and the lower side surface of the square block-shaped main body and the two positioning convex parts, and the front side surface of the square block-shaped main body protrudes out of the assembly area and faces the other end of the movable spring;

be equipped with a bottom on the base, a lateral part upwards extends on one side of the bottom, the assembly area includes that one sets up the inboard recess of lateral part, this recess downwardly extending runs through the bottom is partly, and two medial surfaces of this recess all are equipped with a draw-in groove, and this recess is equipped with down spacing arch in the lower part that runs through bottom one side, the block rubber dress is in when the assembly area, the cubic main part downside supports spacing arch down, this recess upside is withstood to the side of going up of the cubic main part of side, the leading flank salient in the lateral part medial surface, two the location convex part respectively with two the draw-in groove cooperatees. Therefore, the rubber block has better assembling performance and is prevented from falling off.

The concessional through hole is covered with a cover plate which is fixedly connected with the base and also covers a part of each static reed; the cover plate is provided with a first dispensing groove, the first dispensing groove is provided with a plurality of penetration through holes, and each penetration through hole is communicated with the surface of one static reed; and a second dispensing groove is formed between part of the edge of the cover plate and the base, the second dispensing groove is communicated with the first dispensing groove, and the periphery of the abdicating through hole is sealed through dispensing of the second dispensing groove and the first dispensing groove. Therefore, the movable contact and the fixed contact can be well protected, and the service life of the relay is prolonged.

Preferably, the penetration through holes are round holes, the penetration through holes are divided into two parts, and the distance between every two adjacent penetration through holes of each part is smaller than the diameter of the penetration through hole. To ensure that the glue is able to penetrate sufficiently between the cover plate and the stationary spring plate.

The improvement is further realized, a first glue filling space for filling glue is formed between the inner side surface of the plate-shaped base part of each static reed and the base and the housing, a glue injection through hole is formed in the middle of the plate-shaped base part, a glue storage area is arranged at the position, corresponding to the glue injection through hole, of the base, and the glue storage area is communicated with the first glue filling space; the housing is provided with a plurality of first exhaust grooves corresponding to the plate-shaped base, and each first exhaust groove is communicated with the first glue filling space. Therefore, the joint of the base and the housing which are covered by the static reed can be sealed by filling glue, so as to further improve the performance of the relay.

And furthermore, a first dispensing area and a second dispensing area are respectively formed between the two sides of each plate-shaped base part and the base and the housing, and the first dispensing area and the second dispensing area are communicated with the first glue filling space. This may better ensure that the first glue filling space is filled with glue.

The static contact fixing part on each static reed extends into a space between the base and the housing through one abdicating through hole; the lower end face of the housing is parallel to the upper end face of the housing, when the housing is fixedly connected to the base, the plate-shaped base part of each static reed is parallel to the upper end face of the housing, and the distance between the lower end face of the plate-shaped base part of each static reed and the upper end face of the housing is smaller than the distance between the lower end face of the housing and the upper end face of the housing. On one hand, the structural arrangement is more reasonable; on the other hand, it is preferable to protect the stationary spring pieces and prevent the plate-like base portions of the two stationary spring pieces from coming into contact with the conductor to establish conduction.

As an improvement, one end of the base is fixedly connected with an interface shell, an interface groove is formed in the interface shell, four conductive pins are embedded in the base, the conductive pins are electrically insulated from one another, one end of each conductive pin is provided with an insertion part, the four insertion parts are parallel to one another, four matching through holes are formed in the bottom of the interface groove, each insertion part penetrates through one matching through hole to be inserted into the interface groove, and the other end of each conductive pin is electrically connected with a static reed or a coil connecting end. This allows a control or management interface to be formed to facilitate external cabling.

Still further, a side end face of the base outwards extends two positioning protrusions, the four conductive pins are located between the two positioning protrusions, the interface shell is provided with a positioning hole on each of two sides of the interface slot, each positioning protrusion is provided with a clamping hook, each positioning protrusion is inserted into one positioning hole, the clamping hook of each positioning protrusion is clamped on the outer side face of the interface shell, a limiting end face is arranged on one side, close to the base, of the interface shell, and the limiting end face is matched with a side end face of the base for limiting. Therefore, the interface shell can be conveniently positioned and fixedly connected with the base, and the assembly performance is better.

Furthermore, the conductive pins electrically connected with the static reed are first conductive pins, two first embedding grooves are arranged on the outer side surface of the base, each first conductive pin is embedded in one first embedding groove, and the first embedding grooves limit the first conductive pins to move along the inserting direction of the inserting part; the first conductive pin is provided with a first conductive clamping part which is vertical to the inserting part, the plate-shaped base part of the static reed is provided with a clamping through hole, and the first conductive clamping part is in contact fit with the clamping through hole;

the conductive pin electrically connected with one end of the coil is a second conductive pin, two second embedding grooves are arranged on the inner side surface of the base, each second conductive pin is embedded in one second embedding groove, and the second embedding grooves limit the second conductive pins to move along the inserting direction of the inserting part; every second is electrically conductive to be participated in and is equipped with the electrically conductive joint portion of second, the electrically conductive joint portion perpendicular to of second the grafting portion is equipped with electrically conductive draw-in groove in the electrically conductive joint portion of second, two coil enameled wire connection feet have been linked firmly on the coil skeleton, and every coil enameled wire connection foot is equipped with enameled wire winding portion and joint cooperation portion, and enameled wire winding portion forms the electricity with coil enameled wire one end winding and is connected, and one is gone into to joint cooperation portion card of every coil enameled wire connection foot electrically conductive draw-in groove in the electrically conductive joint portion of second forms the electricity and connects.

Therefore, the first conductive pin and the second conductive pin are respectively embedded on the inner side and the outer side of the base to form high-low voltage insulation isolation; on the other hand, the embedding groove of the base has a limiting effect on the first conductive pin and the second conductive pin, so that the first conductive pin and the second conductive pin are prevented from loosening, and the reliability of plug connection is improved. In addition, the electric connection reliability of the first conductive pin and the static reed can be improved, and the electric connection reliability of the second conductive pin and the coil enameled wire connecting pin can be improved.

Furthermore, the end part of the first conductive clamping part is provided with a U-shaped groove, and the two outer side surfaces of the first conductive clamping part and the two inner side surfaces of the clamping through hole form interference fit; the lower parts of two sides of the first conductive clamping part are provided with chip grooves. The first conductive clamping part can be assembled in place, and the electric connection performance of the first conductive pin and the static spring piece is ensured.

In a further improvement, a second glue filling space for filling glue is formed between one side of the interface shell and the housing, glue dispensing and storing grooves are formed in the interface shell on two sides of the interface groove, and each glue dispensing and storing groove is communicated with the second glue filling space; and one side of the housing, which corresponds to the interface shell, is provided with a plurality of second exhaust grooves, and each second exhaust groove is communicated with the second glue filling space. To improve the overall sealing performance.

In a further improvement, each plug-in part is parallel to the axial direction of the coil, and the inner surface of the matching through hole is in contact with the plug-in part penetrating through the matching through hole to support the plug-in part in an auxiliary mode. So that the insertion part has better supporting performance and is convenient to arrange.

As another improvement, the relay further comprises four conductive leading-out pieces, each conductive leading-out piece is provided with a clamping portion and a welding portion, the clamping portion is connected with the welding portion through a bending portion, welding end faces are arranged on the welding portion, the conductive leading-out pieces are mutually electrically insulated, four conductive pins are embedded in the base, one end of each conductive pin is provided with an electric connection portion, the four electric connection portions are mutually parallel and are positioned at one end of the base, the conductive pins are mutually electrically insulated, the housing is provided with a yielding through hole close to each electric connection portion, the clamping portion of each conductive leading-out piece penetrates through the yielding through hole to be clamped with one electric connection portion to achieve electric connection, the welding portion of each conductive leading-out piece is positioned outside the housing, and the welding end faces of the welding portions of all the conductive leading-out pieces are positioned; when the electromagnetic relay is installed, the welding part is welded with an external circuit board patch bonding pad by using a welding end face; the other ends of the two conductive pins are respectively and electrically connected with the two static reeds, and the other ends of the other two conductive pins are respectively and electrically connected with the two ends of the coil. Therefore, the electromagnetic relay can be directly used for mounting the circuit board, and automatic assembly operation is convenient to realize.

The improvement is further that each conductive leading-out piece is U-shaped, two clamping parts and a welding part are formed on each conductive leading-out piece, and the two clamping parts are perpendicular to the welding part; the housing is being close to every electricity connection portion department is equipped with two and steps down the through-hole, and two joint portions on every electrically conductive leading-out piece pass two respectively it is in one to step down the through-hole joint simultaneously on the electricity connection portion. Therefore, as long as one clamping part is arranged on the two clamping parts and can be reliably and electrically connected with the electric connection part, the normal work can be ensured, and the electric connection reliability is improved; in addition, the two clamping parts are clamped on one electric connection part simultaneously, so that the connection stability can be improved.

The improved structure is characterized in that each conductive leading-out piece is provided with a shoulder on the clamping portion, and the shoulder is matched with the inner side surface of the housing to prevent the clamping portion of the conductive leading-out piece from being separated from the electric connection portion on the conductive pin. So as to form a withdrawal prevention structure to prevent the conductive leading-out member from falling off.

The improvement is further that a clamping groove is arranged on the clamping portion of each conductive leading-out piece, and the clamping portion is clamped on the electric connection portion through the clamping groove and forms interference fit. To further improve the reliability of the electrical connection.

The improved structure is characterized in that convex parts are arranged on the base between the adjacent electric connection parts, a matching groove is arranged on the inner side surface of the housing corresponding to each convex part, and each convex part is matched with the matching groove so as to increase the creepage distance and the electric clearance between the adjacent conductive leading-out parts; reliable electrical insulation between the high-voltage loop and the low-voltage loop is ensured, and the use safety is further improved.

The welding parts of all the conductive leading-out pieces are attached to the same outer side face of the housing, so that the welding end faces of the welding parts of all the conductive leading-out pieces are positioned on the same plane. So as to facilitate the assembly and the positioning and ensure that all the welding end faces are positioned on the same plane.

The improved structure is characterized in that one side of the housing, which is far away from the abdicating through hole, is provided with an installation part which extends outwards, the installation part is parallel to the welding end surface, the installation part is provided with an installation through hole, the inner wall of the installation through hole is embedded with a metal ring, and the metal ring and the housing are connected into a whole; the electromagnetic relay is characterized in that two positioning columns are arranged on the outer side face of the housing, provided with the yielding through hole, and are parallel to the axial direction of the mounting through hole, and the electromagnetic relay is positioned with an external circuit board by utilizing the two positioning columns. Therefore, the electromagnetic relay is convenient to install and fix, and the electromagnetic relay is convenient to position with an external circuit board.

Because each static reed comprises a plate-shaped base part, one part of one side of the plate-shaped base part extends outwards and is bent to form a static contact fixing part, a static contact is fixedly arranged on the static contact fixing part, and a abdicating through hole is arranged on the base; two stationary reed utilize platelike basal portion interval to link firmly respectively on the lateral surface of base, every stationary contact fixed part passes through the through-hole of stepping down stretches into between base and the housing. The main part of every static reed is in the outside like this, and the form through heat radiation, thermal convection is to outer transfer heat easily, improves the radiating effect of static reed greatly, can better improve the performance to the relay that the power ratio is great. In addition, the static reed and the base do not need to be molded into a whole, so that the static reed and the static contact can be well protected, the injection molding process of the base can be greatly simplified, the manufacturing cost is effectively reduced, and the service life of the relay is prolonged.

On the other hand, because the static reed main body is positioned at the outer side of the base, the electric clearance and creepage distance between the static reed and the coil can be increased, and the mutual influence of high voltage and low voltage is prevented. The utility model discloses still be convenient for realize automatic assembly.

Drawings

FIG. 1 is a top perspective view of a first embodiment of the present invention;

FIG. 2 is a top perspective view of a first embodiment of the present invention hiding the enclosure;

fig. 3 is a bottom perspective view of a first embodiment of the present invention;

fig. 4 is a bottom view of the first embodiment of the present invention;

FIG. 5 is a sectional view A-A of FIG. 4;

FIG. 6 is a cross-sectional view B-B of FIG. 4;

FIG. 7 is a cross-sectional view C-C of FIG. 4;

fig. 8 is an exploded perspective view of the first embodiment of the present invention;

FIG. 9 is an enlarged view at D of FIG. 8;

FIG. 10 is a top perspective view of a base according to a first embodiment of the present invention;

FIG. 11 is a bottom perspective view of the base of the first embodiment of the present invention;

FIG. 12 is a perspective view of a stationary spring plate according to a first embodiment of the present invention;

FIG. 13 is a perspective view of a rubber block according to a first embodiment of the present invention;

fig. 14 is a perspective view of a cover according to a first embodiment of the present invention;

fig. 15 is a perspective view of a first conductive pin according to a first embodiment of the present invention;

fig. 16 is a perspective view of a second conductive pin according to the first embodiment of the present invention;

fig. 17 is a perspective view of the first embodiment interface housing of the present invention;

figure 18 is another perspective view of the interface housing of the first embodiment of the present invention;

fig. 19 is a top perspective view of a second embodiment of the present invention;

fig. 20 is a bottom perspective view of a second embodiment of the present invention;

FIG. 21 is a view in the direction E of FIG. 20;

FIG. 22 is a cross-sectional view F-F of FIG. 21;

FIG. 23 is an enlarged view at G of FIG. 22;

fig. 24 is a bottom view of a second embodiment of the present invention;

FIG. 25 is a sectional view taken at H-H of FIG. 24;

fig. 26 is a perspective view of a second embodiment of the conductive lead-out member of the present invention;

fig. 27 is a perspective view of the conductive lead-out member of the second embodiment of the present invention engaged with the first conductive pin;

fig. 28 is a perspective view of the conductive lead-out member of the second embodiment of the present invention engaged with the second conductive pin;

figure 29 is a top perspective view of a base according to a second embodiment of the present invention;

figure 30 is a bottom perspective view of a base according to a second embodiment of the present invention.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

In the first embodiment, as shown in fig. 1 to 18, an electromagnetic relay includes a base 1, a housing 2, a coil 3, a movable spring 4 and two stationary springs 5, the housing 2 is fixedly connected to the base 1 in a snap-fit manner, the lower portion of the inner side of the housing 2 is provided with three snap-fit limiting portions 21, the three snap-fit limiting portions 21 clamp the base 1, the coil 3 is wound on a coil frame 31, the coil frame 31 is fixedly connected to the base 1, the coil 3, the coil frame 31 and the movable spring 4 are located between the base 1 and the housing 2, an iron core 32 is installed in a central hole of the coil frame 31, the coil frame 31 is fixedly connected to a yoke 33, the yoke 33 is L-shaped, one end of the yoke 33 is fixedly connected to one side of the coil frame 31, the other end of the yoke 33 is parallel to the coil 3, one end of the yoke 33 is provided with two first snap-fit fixing legs 331, the lower portion of the other side of the coil frame 31 is provided with two second snap-fit fixing legs 311, the two first clamping fixing feet 331 are respectively matched with the two first clamping fixing holes 11, and the two second clamping fixing feet 311 are respectively matched with the two second clamping fixing holes 12 to enable the coil frame 31 to be fixedly connected with the base 1.

The movable spring 4 is bent along the middle part, one end of the movable spring 4 is fixedly connected with the other end of the yoke 33, the other end of the movable spring 4 is fixedly connected with an armature 41, and the other end of the movable spring 4 is also provided with two movable contacts 42, specifically: the other end of the movable spring plate 4 is fixedly connected with a conductive plate 43, and the two movable contacts 42 are arranged on the conductive plate 43; the armature 41 corresponds to one end of the iron core 32, the other end of the iron core 32 is connected with the yoke 33, each static spring 5 comprises a plate-shaped base 51, a part of one side of the plate-shaped base 51 extends outwards and is bent to form a static contact fixing part 52, the static contact fixing part 52 is perpendicular to the plate-shaped base 51 and is fixedly provided with a static contact 521, and the base 1 is provided with two abdicating through holes 13; the two static springs 5 are in a symmetrical structure and are fixedly connected on the outer side surface of the base 1 at intervals by utilizing the plate-shaped base parts 51 of the two static springs respectively, each static contact fixing part 52 extends into the space between the base 1 and the housing 2 through one abdicating through hole 13, and each static contact 521 corresponds to one movable contact 42 on the movable spring 4. The plate-like base 51 of each stationary spring 5 partially protrudes outside the housing 2 to form a connecting portion which is fixedly connected to the load connecting terminal by a connecting screw, and the connecting portion is provided with a connecting through hole 511 through which the connecting screw passes. The lower end surface of the housing 2 is parallel to the upper end surface of the housing 2, when the housing 2 is fixedly connected to the base 1, the plate-shaped base 51 of each static reed 5 is parallel to the upper end surface of the housing 2, and the distance between the lower end surface of the plate-shaped base 51 of each static reed 5 and the upper end surface of the housing 2 is smaller than the distance between the lower end surface of the housing 2 and the upper end surface thereof. This can protect the stationary spring 5 well and prevent the plate-like base portions 51 of the two stationary spring 5 from coming into contact with the conductor to establish conduction.

A part of three side surfaces of the plate-shaped base 51 on each static spring 5 extends outwards and is bent to form a rivet fixing portion 52, the base 1 is provided with three corresponding rivet holes 14 for each static spring 5, and each rivet fixing portion 52 is matched with one rivet hole 14 so that the plate-shaped base 51 is fixedly connected on the outer side surface of the base 1. Therefore, the assembly is convenient, and the assembly efficiency is improved.

One side of the base 1 close to the other end of the movable reed 4 is provided with an assembly area 15, the assembly area 15 is fixedly connected with a rubber block 6, and the rubber block 6 limits the moving distance of the rebound reset of the other end of the movable reed 4 and provides a buffer effect. The noise can be well reduced.

As further shown in fig. 10, 11 and 13, the rubber block 6 includes a square main body 61, two positioning protrusions 62 extend from two sides of the square main body 61, the rubber block 6 is positioned with the mounting area 15 by the upper and lower side surfaces of the square main body 61 and the two positioning protrusions 62, and the front side surface of the square main body 61 protrudes from the mounting area 5 and faces the other end of the movable spring 4.

The arrangement structure of the assembly area 15 specifically comprises: be equipped with a bottom 1d on the base 1, bottom 1d one side upwards extends a lateral part 1e, assembly area 15 includes that one sets up the inboard recess 150 of lateral part 1e, this recess 150 downwardly extending runs through bottom 1d is partly, and two medial surfaces of this recess 150 all are equipped with a draw-in groove 151, and this recess 150 is equipped with down spacing arch 16 in the lower part that runs through bottom 1d one side, block rubber 6 dress is in during assembly area 15, the cubic main part 61 downside supports spacing arch 16 down, the upside of this recess 150 is withstood to the side of going up of cubic main part 61, the leading flank of cubic main part 61 salient in lateral part 1e medial surface, two location convex part 62 respectively with two the draw-in groove 151 cooperatees.

The two positioning protrusions 62 are also fastened to the two slots 151 by glue.

When housing 2 links firmly base 1, the spacing portion 21 of a joint on housing 2 still blocks rubber block 6 the cubic main part 61 downside of side, spacing arch 16 and the spacing portion 21 of joint prevent jointly that rubber block 6 breaks away from base 1 down.

The two abdicating through holes 13 are covered with a cover plate 7, and the cover plate 7 also covers a part of each static reed 5; the cover plate 7 is provided with a first dispensing groove 71, the first dispensing groove 71 is provided with a plurality of penetration through holes 72, and each penetration through hole 72 is communicated with the surface of one static reed 5. The glue can conveniently flow between the outer surface of the static reed 5 and the inner surface of the cover plate 7 through the penetration through hole 72 so as to improve the plastic packaging effect.

Preferably, the penetration through holes 72 are circular holes, the penetration through holes 72 are divided into two parts, and the distance between adjacent penetration through holes 72 of each part is smaller than the diameter of the penetration through holes 72. Four hooks 73 are arranged on the cover plate 7, two hooks 73 are clamped on the base 1, and the other two hooks 73 are respectively clamped on the plate-shaped base parts 51 of the two static spring pieces 5, so that the cover plate 7 is fixedly connected on the base 1.

When the cover plate 7 is fixedly connected to the base 1, a second dispensing groove 74 is formed between the partial edge of the cover plate 7 and the base, the second dispensing groove 74 is communicated with the first dispensing groove 71, dispensing is performed on the periphery of the abdicating through hole 13 through the second dispensing groove 74 and the first dispensing groove 71, so that the movable contact 42 of the movable spring piece 4 and the static contact 521 on the static spring piece 5 are well protected from oxidative corrosion of external gas, and the service life is prolonged.

A first glue filling space 50 for filling glue is formed between the inner side surface of the plate-shaped base 51 of each static reed 5 and the base 1 and the housing 2, a glue injection through hole 54 is formed in the middle of the plate-shaped base 51, a glue storage area 17 is arranged at the position, corresponding to the glue injection through hole 54, of the base 1, and the glue storage area 17 is communicated with the first glue filling space 50; the housing 2 is provided with a plurality of first exhaust grooves 22 corresponding to the plate-shaped base 51, and each first exhaust groove 22 is communicated with the first glue filling space 50. The plurality of first exhaust grooves 22 prevent gas from accumulating in the first glue filling space 50, and prevent the gas from obstructing the flow of the glue.

The base 1 is provided with a first dispensing area 18 and a second dispensing area 19 on two sides of each plate-shaped base 51, and the first dispensing area 18 and the second dispensing area 19 are both communicated with the first glue filling space 50.

By injecting glue into the glue injection through hole 54, the first glue dispensing area 18 and the second glue dispensing area 19, the glue is quickly filled into the first glue filling space 50 for plastic packaging. Wherein the glue entering from the glue injection through hole 54 first enters the glue storage area 17 and then flows into the first glue filling space 50 from the glue storage area 17.

The interface device is characterized in that one end of the base 1 is fixedly connected with an interface shell 8, the interface shell 8 is provided with an interface slot 81, one side end face 1a of the base 1 extends outwards to form two positioning protrusions 10, each positioning protrusion 10 is provided with a clamping hook 101, the interface shell 8 is provided with a positioning hole 82 on each of two sides of the interface slot 81, each positioning protrusion 10 is inserted into one positioning hole 82, the clamping hook 101 of each positioning protrusion 10 is clamped on the outer side face of the interface shell 8, the interface shell 8 is provided with a limit end face 8a close to one side of the base 1, and the limit end face 8a is matched with one side end face 1 a.

Each of the positioning protrusions 10 is provided with a relief groove 102 at a position close to the hook 101, and the relief groove 102 deforms and relieves the hook 101 when the hook 101 is assembled. To facilitate assembly.

Four conductive pins 9 are embedded on the base 1, the conductive pins 9 are electrically insulated from each other, the four conductive pins 9 are located between two positioning protrusions 10, one end of each conductive pin 9 is provided with an insertion part 90, the four insertion parts 90 are parallel to each other and parallel to the axial direction of the coil 3, the bottom of the interface slot 81 is provided with four matching through holes 811, each insertion part 90 penetrates through one matching through hole 811 and is inserted into the interface slot 81, the inner surface of each matching through hole 811 is in contact with the insertion part 90 penetrating through the matching through hole 811 to support the insertion part 90 in an auxiliary manner, and the other end of each conductive pin 9 is electrically connected with the static reed 5 or the connecting end of the coil 3.

The conductive pin 9 electrically connected with the static reed 5 is a first conductive pin 91, two first embedding grooves 1b are arranged on the outer side surface of the base 1, each first conductive pin 91 is embedded in one first embedding groove 1b, and the first embedding grooves 1b limit the first conductive pins 91 to move along the inserting direction of the inserting part 90; the other end of each first conductive pin 91 is provided with a first conductive clamping part 911, the first conductive clamping part 911 is perpendicular to the insertion part 90, a clamping through hole 55 is arranged on the plate-shaped base part 51 of the static reed 5, and the first conductive clamping part 911 is in contact fit with the clamping through hole 55;

the tip of first electrically conductive joint portion 911 is equipped with U-shaped groove 912, first electrically conductive joint portion 911 utilize two lateral surfaces with two medial surfaces of joint through-hole 55 form interference fit. Thus, a better electrical connection effect can be formed, and the U-shaped groove 912 can provide an abdicating space for the deformation of the first conductive clamping portion 911, thereby facilitating assembly.

First electrically conductive joint portion 911 both sides lower part all is equipped with chip groove 912, during the assembly, static reed 5 with the metal fillings that first electrically conductive joint portion 911 interference fit produced can pile up in chip groove 912 department, avoid the assembly not in place or assemble the back because this department piles up has the metal fillings and leads to kick-backing.

The conductive pin 9 electrically connected with one end of the coil 3 is a second conductive pin 92, the two second conductive pins 92 are positioned between the two first conductive pins 91 and embedded on the inner side surface of the base 1, two second embedding grooves 1c are arranged on the inner side surface of the base 1, each second conductive pin 92 is embedded on one second embedding groove 1c, and the second embedding grooves 1c limit the second conductive pins 92 to move along the inserting direction of the inserting part 90;

be equipped with the electrically conductive joint portion 921 of second on every electrically conductive participating in 92 of second, the electrically conductive joint portion 921 perpendicular to of second grafting portion 90 is equipped with electrically conductive draw-in groove 922 on the electrically conductive joint portion 921 of second, coil skeleton 31 has linked firmly two coil enameled wire connection feet 34, and every coil enameled wire connection foot 34 is equipped with enameled wire winding portion 341 and joint cooperation portion 342, and enameled wire winding portion 341 forms the electricity with the winding of 3 enameled wires one end of coil and is connected, and the joint cooperation portion 342 card of every coil enameled wire connection foot 34 is gone into one electrically conductive draw-in groove 922 in the electrically conductive joint portion of second forms the electricity and connects, two lateral surfaces of the joint cooperation portion 342 of coil enameled wire connection foot 34 with two medial surfaces of electrically conductive draw-in groove 922 contact.

When the housing 2 is fixedly connected to the base 1, a second glue filling space 80 for filling glue is formed between one side of the interface shell 8 and the housing 2, glue dispensing glue storage grooves 83 are respectively arranged on two sides of the interface groove 81 of the interface shell 8, and each glue dispensing glue storage groove 83 is communicated with the second glue filling space 80; a plurality of second air discharge grooves 23 are formed in one side of the housing 2 corresponding to the interface shell 8, and each second air discharge groove 23 is communicated with the second glue filling space 80. Glue is injected through the two glue dispensing and storing grooves 83, so that the second glue filling space 80 is filled with glue to achieve a sealing effect. The plurality of second air discharge grooves 23 prevent gas from accumulating in the second glue filling space 80, and prevent the gas from obstructing the flow of the glue.

One inner side surface of the interface slot 81 on the interface housing 8 is provided with a clamping through hole 84 matched with the external plug, when the external plug is inserted into the interface slot 81, the clamping through hole 84 is matched with the clamping protrusion on the external plug to prevent the external plug from being separated from the interface slot 81.

When the magnetic coupling device is used in the embodiment, the connecting part of the plate-shaped base part 51 of each static spring 5 extending out of the housing 2 is fixedly connected with one load connecting terminal through a connecting screw, the interface slot 81 is inserted into an external plug, a control power supply is introduced through the external plug to electrify the coil 3 through the two second conductive pins 92, the generated magnetic force enables the armature 41 to be attracted with one end of the iron core 32, the two static contacts 521 are simultaneously jointed with the two movable contacts 42 of the movable spring 4, the two static springs 5 are mutually conducted, and the two static springs 5 are mutually conducted and then transmit signals to the outside through the external plug through the two first conductive pins 91. When the external control power supply is disconnected, the magnetic force disappears, the elastic force of the movable spring leaves the armature 41 from one end of the iron core 32, the two fixed contacts 521 simultaneously leave the two movable contacts 42 of the movable spring 4, the two fixed springs 5 are disconnected with each other, and the two fixed springs 5 are also in a disconnected state, so that signals are transmitted to the outside through the external plug by the two first conductive pins 91.

In the second embodiment, as shown in fig. 19 to 30, an electromagnetic relay includes a base 1, a housing 2, a coil 3, a movable spring 4 and two stationary springs 5, the housing 2 is fixedly connected to the base 1, the coil 3 is wound on a coil frame 31, the coil frame 31 is fixedly connected to the base 1, the coil frame 31 is located between the base 1 and the housing 2, an iron core 32 is installed in a central hole of the coil frame 31, a yoke 33 is fixedly connected to the coil frame 31, the yoke 33 is L-shaped, one end of the yoke 33 is fixedly connected to one side of the coil frame 31, the other end of the yoke 33 is parallel to the axial direction of the coil 3, the movable spring 4 is bent along the middle portion, one end of the movable spring 4 is fixedly connected to the other end of the yoke 33, the other end of the movable spring 4 is fixedly connected to an armature 41, and the other end of the movable spring.

Each static spring 5 comprises a plate-shaped base 51, a part of one side of the plate-shaped base 51 extends outwards and is bent to form a static contact fixing part 52, the static contact fixing part 52 is perpendicular to the plate-shaped base 51 and is fixedly provided with a static contact 521, the two static springs 5 are in a symmetrical structure and are fixedly connected on the outer side surface of the base 1 at intervals by utilizing the plate-shaped base 51 respectively, each static contact fixing part 52 extends into a space between the base 1 and the housing 2, and each static contact 521 corresponds to one movable contact 42 on the movable spring 4. The plate-like base 51 is partially located outside the housing 2 and forms a connection portion to be connected to the load connection terminal, and the connection portion is provided with a mounting opening 511.

As further shown in fig. 26, the present embodiment further includes four conductive leading-out pieces 6, each conductive leading-out piece 6 is electrically insulated from each other, the conductive leading-out piece 6 is U-shaped, two clamping portions 61 and a welding portion 62 are disposed on the conductive leading-out piece 6, the two clamping portions 61 are perpendicular to the welding portion 62, the two clamping portions 61 and the welding portion 62 are connected by a bending portion 63, a welding end face is disposed on the welding portion 62, and the welding end face is an outer side face of the welding portion 62.

Four conductive pins 7 are embedded on the base 1, the conductive pins 7 are electrically insulated from each other, one end of each conductive pin 7 is provided with an electric connection part 70, the four electric connection parts 70 are parallel to each other and are positioned at one end of the base 1, the housing 2 is provided with two abdicating through holes 21 at the position close to each electric connection part 70, two clamping parts 61 on each conductive leading-out piece 6 respectively penetrate through the two abdicating through holes 21 and are clamped on one electric connection part 70 to realize electric connection, the welding part 62 of each conductive leading-out piece 6 is positioned outside the housing 2, and the welding end faces of the welding parts 62 of all conductive leading-out pieces 6 are positioned on the same plane; when the electromagnetic relay is installed, the welding part 62 is welded with a circuit board patch bonding pad by using a welding end face; the other end of each conductive pin 7 is electrically connected with the static reed 5 or the connecting end of the coil 3.

A clamping groove 611 is arranged on the clamping portion 61 of each conductive leading-out member 6, and the clamping portion 61 is clamped on the electric connecting portion 70 by the clamping groove 611 and forms interference fit. To ensure the reliability of the electrical connection.

Two shoulders 612 are arranged on the clamping part 61 on each conductive leading-out piece 6, and the shoulders 612 are matched with the inner side surface of the housing 2 to prevent the clamping part 61 of the conductive leading-out piece 6 from being separated from the electric connection part 70 on the conductive pin 7.

The base 1 between the adjacent electric connection parts 70 is provided with a convex part 1a, the inner side surface of the housing 2 is provided with a matching groove 2a corresponding to each convex part 1a, and each convex part 1a is matched with the matching groove 2a to increase the creepage distance and the electric clearance between the adjacent conductive leading-out parts 6. Reliable electrical insulation between the high-voltage loop and the low-voltage loop is ensured, and the use safety is further improved.

Two mounting parts 22 extending outwards are arranged on one side of the housing 2 away from the abdicating through hole 21, the mounting parts 22 are parallel to the welding end face, mounting through holes 221 are arranged on the mounting parts 22, metal rings 222 are embedded on the inner walls of the mounting through holes 221, and the metal rings 222 and the housing 2 are connected into a whole through injection molding; the housing 2 is provided with two positioning columns 23 on the outer side surface provided with the abdicating through hole 21, the two positioning columns 23 are parallel to the axial direction of the installation through hole 221, and the electromagnetic relay utilizes the two positioning columns 23 to position with the circuit board. Two positioning through holes can be arranged on the circuit board, and the two positioning columns 23 are matched with the two positioning through holes on the circuit board. And the positioning between the welding device and the circuit board is convenient, and the accuracy of the welding position is ensured.

The inner side surfaces of the welding portions 62 of all the conductive leads 6 are attached to the same outer side surface of the housing 2, so that the welding end surfaces of the welding portions 62 of all the conductive leads 6 are on the same plane.

The number of the static reeds 5 is two, the number of the conductive pins 7 is four, two conductive pins 7 are respectively and electrically connected with the two static reeds 5, and the other two conductive pins 7 are respectively and electrically connected with two ends of the coil 3;

the conductive pin 7 electrically connected with the static reed 5 is a first conductive pin 71, two first embedding grooves 1b are arranged on the outer side surface of the base 1, and each first conductive pin 71 is embedded in one first embedding groove 1 b; the first conductive pin 71 is provided with a first conductive clamping part 711, the first conductive clamping part 711 is perpendicular to the electric connection part 70, the plate-shaped base 51 of the static spring 5 is provided with a clamping through hole 53, and the first conductive clamping part 711 is in contact fit with the clamping through hole 53 to realize electric connection;

the conductive pin 7 electrically connected to one end of the coil 3 is a second conductive pin 72, two second fitting grooves 1c are formed in the inner side surface of the base 1, each second conductive pin 72 is fitted in one second fitting groove 1c, a second conductive clamping portion 721 is formed on the second conductive pin 72, the second conductive clamping portion 721 is perpendicular to the electrical connection portion 70, and the second conductive clamping portion 721 is electrically connected to the pin of the coil 3 in a clamping manner.

As further shown in fig. 23, electrical connections 70 on two first conductive pins 71 are in a neutral position and electrical connections 70 on two second conductive pins 72 are on opposite sides.

A plurality of first matching convex parts 11b are arranged on the inner side surface of the first matching groove 1b, and the first matching convex parts 11b are pressed against the first conductive pins 71 to prevent the first conductive pins 71 from loosening; the inner side surface of the second fitting groove 1c is provided with a second fitting protrusion 11c, and the second fitting protrusion 11c abuts against the second conductive pin 72 to prevent the second conductive pin 72 from loosening.

When this embodiment uses, earlier utilize two installation departments 22 of housing 2 to fix whole relay, then utilize two reference columns 23 and circuit board to fix a position, four welding terminal surface and the laminating of circuit board correspondence paster pad on the welding part 62, then the welding just so can give coil 3 input control power through the circuit board, then the operating condition of two stationary reed 3 is gathered to the circuit board again.

The above are only two preferred embodiments of the present invention, and those skilled in the art will be able to make equivalent changes in the claims and fall within the scope of the present invention.

Claims (15)

1. The utility model provides an electromagnetic relay, the on-line screen storage device comprises a base, the housing, a coil, a movable contact spring and two quiet reed, the housing links firmly with the base, the coil is around on coil skeleton, coil skeleton forms with the base and links firmly, the coil is in between base and the housing, the iron core is equipped with in the coil centre bore, the yoke has been linked firmly on the coil skeleton, the movable contact spring is buckled along the mid portion, the one end of movable contact spring links firmly on the yoke, the other end of movable contact spring has linked firmly armature, still be equipped with a plurality of movable contacts on the other end of movable contact spring, armature is corresponding with iron core one end, the yoke is connected or is connected through magnet steel to the other end of: each static reed comprises a plate-shaped base part, one part of one side of the plate-shaped base part extends outwards and is bent to form a static contact fixing part, a static contact is fixedly arranged on the static contact fixing part, and a abdicating through hole is formed in the base; the two static reeds are fixedly connected on the outer side surface of the base at intervals by utilizing the plate-shaped base parts respectively, each static contact fixing part extends into the space between the base and the housing through the abdicating through hole, and each static contact corresponds to one movable contact on the movable reed; the plate-like base portion on each stationary spring plate protrudes outside the housing to form a connecting portion.

2. An electromagnetic relay according to claim 1, characterized in that: a part of three side surfaces of the plate-shaped base part on each static reed extends outwards and is bent to form a riveting fixing part, a plurality of corresponding riveting holes are formed in the base, and each riveting fixing part is matched with one riveting hole to enable the plate-shaped base part to be fixedly connected to the outer side surface of the base; the stationary contact fixing portion on each stationary spring plate is perpendicular to the plate-like base portion thereof.

3. An electromagnetic relay according to claim 1, characterized in that: the base is close to one side of the other end of the movable reed is provided with an assembly area, a rubber block is fixedly connected to the assembly area, and the rubber block limits the moving distance of the rebound reset of the other end of the movable reed and provides a buffer effect.

4. An electromagnetic relay according to claim 3, characterized in that: the rubber block comprises a square block-shaped main body, wherein the rear parts of the left side and the right side of the square block-shaped main body extend outwards in each direction to form a positioning convex part, the rubber block is positioned with the assembly area through the upper side surface and the lower side surface of the square block-shaped main body and the two positioning convex parts, and the front side surface of the square block-shaped main body protrudes out of the assembly area and faces the other end of the movable spring;

be equipped with a bottom on the base, a lateral part upwards extends on one side of the bottom, the assembly area includes that one sets up the inboard recess of lateral part, this recess downwardly extending runs through the bottom is partly, and two medial surfaces of this recess all are equipped with a draw-in groove, and this recess is equipped with down spacing arch in the lower part that runs through bottom one side, the block rubber dress is in when the assembly area, the cubic main part downside supports spacing arch down, this recess upside is withstood to the side of going up of the cubic main part of side, the leading flank salient in the lateral part medial surface, two the location convex part respectively with two the draw-in groove cooperatees.

5. An electromagnetic relay according to claim 1, characterized in that: the abdicating through hole is covered with a cover plate which is fixedly connected with the base and also covers a part of each static reed; the cover plate is provided with a first dispensing groove, the first dispensing groove is provided with a plurality of penetration through holes, and each penetration through hole is communicated with the surface of one static reed; a second dispensing groove is formed between part of the edge of the cover plate and the base, the second dispensing groove is communicated with the first dispensing groove, and the periphery of the abdicating through hole is sealed through dispensing of the second dispensing groove and the first dispensing groove;

the penetration through holes are round holes, the penetration through holes are divided into two parts, and the distance between every two adjacent penetration through holes of each part is smaller than the diameter of the penetration through holes.

6. An electromagnetic relay according to claim 1, characterized in that: a first glue filling space for filling glue is formed between the inner side surface of the plate-shaped base part of each static reed and the base and the housing, a glue injection through hole is formed in the middle of the plate-shaped base part, a glue storage area is arranged at the position, corresponding to the glue injection through hole, of the base, and the glue storage area is communicated with the first glue filling space; a plurality of first exhaust grooves are formed in the position, corresponding to the plate-shaped base, of the housing, and each first exhaust groove is communicated with the first glue filling space;

and a first dispensing area and a second dispensing area are respectively formed between the two sides of each plate-shaped base part and the base and the housing, and the first dispensing area and the second dispensing area are communicated with the first glue filling space.

7. An electromagnetic relay according to claim 1, characterized in that: the base is provided with two abdicating through holes, the two static reeds are fixedly connected to the base in a symmetrical structure, and the static contact fixing part on each static reed extends into a space between the base and the housing through one abdicating through hole; the lower end face of the housing is parallel to the upper end face of the housing, when the housing is fixedly connected to the base, the plate-shaped base part of each static reed is parallel to the upper end face of the housing, and the distance between the lower end face of the plate-shaped base part of each static reed and the upper end face of the housing is smaller than the distance between the lower end face of the housing and the upper end face of the housing.

8. An electromagnetic relay according to any one of claims 1 to 7, characterized in that: the connector comprises a base and is characterized in that one end of the base is fixedly connected with an interface shell, an interface groove is formed in the interface shell, four conductive pins are embedded in the base, the conductive pins are electrically insulated from each other, one end of each conductive pin is provided with an insertion part, the four insertion parts are parallel to each other, four matching through holes are formed in the bottom of the interface groove, each insertion part penetrates through one matching through hole and is inserted into the interface groove, the inner surface of each matching through hole is in contact with the insertion part penetrating through the matching through hole to support the insertion part in an auxiliary mode, and the other end of each conductive pin is electrically connected with a static reed.

9. An electromagnetic relay according to claim 8, characterized in that: two location archs of the outside extension of a side end face of base, four electrically conductive participating in are in between two location archs, and the interface casing all is equipped with a locating hole in the both sides in interface groove, is equipped with the pothook in every location arch, and every location arch inserts a locating hole, and the protruding pothook card in location is on the lateral surface of interface casing, and the interface casing is close to base one side and is equipped with spacing terminal surface, and spacing terminal surface mutually supports with a base side end face and carries on spacingly.

10. An electromagnetic relay according to claim 8, characterized in that: the conductive pin electrically connected with the static reed is a first conductive pin, two first embedding grooves are formed in the outer side surface of the base, each first conductive pin is embedded in one first embedding groove, and the first embedding grooves limit the first conductive pins to move along the inserting direction of the inserting part; the first conductive pin is provided with a first conductive clamping part which is vertical to the inserting part, the plate-shaped base part of the static reed is provided with a clamping through hole, and the first conductive clamping part is in contact fit with the clamping through hole;

the conductive pin electrically connected with one end of the coil is a second conductive pin, two second embedding grooves are arranged on the inner side surface of the base, each second conductive pin is embedded in one second embedding groove, and the second embedding grooves limit the second conductive pins to move along the inserting direction of the inserting part; each second conductive pin is provided with a second conductive clamping part which is perpendicular to the splicing part, a conductive clamping groove is formed in the second conductive clamping part, the coil framework is fixedly connected with two coil enameled wire connecting pins, each coil enameled wire connecting pin is provided with an enameled wire winding part and a clamping matching part, the enameled wire winding part is wound with one end of each coil enameled wire to form electric connection, and the clamping matching part of each coil enameled wire connecting pin is clamped into one conductive clamping groove in the second conductive clamping part to form electric connection;

the end part of the first conductive clamping part is provided with a U-shaped groove, and the first conductive clamping part forms interference fit with two inner side surfaces of the clamping through hole by utilizing two outer side surfaces; the lower parts of two sides of the first conductive clamping part are provided with chip grooves.

11. An electromagnetic relay according to claim 8, characterized in that: a second glue filling space for filling glue is formed between one side of the interface shell and the housing, glue dispensing and storing grooves are formed in the interface shell on two sides of the interface groove, and each glue dispensing and storing groove is communicated with the second glue filling space; and one side of the housing, which corresponds to the interface shell, is provided with a plurality of second exhaust grooves, and each second exhaust groove is communicated with the second glue filling space.

12. An electromagnetic relay according to any one of claims 1 to 7, characterized in that: the electric conduction leading-out device comprises a base, four electric conduction leading-out pieces and a shell, and is characterized by further comprising four electric conduction leading-out pieces, wherein each electric conduction leading-out piece is provided with a clamping part and a welding part, the clamping part is connected with the welding part through a bending part, a welding end face is arranged on the welding part, the electric conduction leading-out pieces are mutually electrically insulated, four electric conduction pins are embedded on the base, one end of each electric conduction pin is provided with an electric connection part, the four electric connection parts are mutually parallel and are positioned at one end of the base, the electric conduction pins are mutually electrically insulated, the shell is provided with a abdication through hole close to each electric connection part, the clamping part of each electric conduction leading-out piece penetrates through the abdication through hole to be clamped with one electric connection part so as to; when the electromagnetic relay is installed, the welding part is welded with an external circuit board patch bonding pad by using a welding end face; the other ends of the two conductive pins are respectively and electrically connected with the two static reeds, and the other ends of the other two conductive pins are respectively and electrically connected with the two ends of the coil.

13. An electromagnetic relay according to claim 12, characterized in that: each conductive leading-out piece is U-shaped, two clamping parts and a welding part are formed on each conductive leading-out piece, and the two clamping parts are perpendicular to the welding part; two abdicating through holes are formed in the position, close to each electric connection part, of the housing, and the two clamping parts on each conductive leading-out piece penetrate through the two abdicating through holes and are clamped on the electric connection parts simultaneously;

the shoulder is arranged on the clamping portion on each conductive leading-out piece, and the shoulder is matched with the inner side face of the housing to prevent the clamping portion of the conductive leading-out piece from being separated from the electric connection portion on the conductive pin.

14. An electromagnetic relay according to claim 12, characterized in that: convex parts are arranged on the base between the adjacent electric connection parts, a matching groove is arranged on the inner side surface of the cover shell corresponding to each convex part, and each convex part is matched with the matching groove so as to increase the creepage distance and the electric clearance between the adjacent conductive leading-out parts; the welding parts of all the conductive leading-out pieces are attached to the same outer side face of the housing, so that the welding end faces of the welding parts of all the conductive leading-out pieces are positioned on the same plane.

15. An electromagnetic relay according to claim 12, characterized in that: an installation part extending outwards is arranged on one side of the housing away from the abdicating through hole, the installation part is parallel to the welding end face, an installation through hole is arranged on the installation part, a metal ring is embedded on the inner wall of the installation through hole, and the metal ring and the housing are connected into a whole; the outer side surface of the housing, which is provided with the abdicating through hole, is provided with two positioning columns, the two positioning columns are parallel to the axial direction of the mounting through hole, and the electromagnetic relay is positioned with an external circuit board by utilizing the two positioning columns; the clamping portion is provided with a clamping groove, and the clamping portion is clamped on the electric connection portion through the clamping groove to form interference fit.

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