An electromagnetic relay with strong impact resistance and convenient for automatic assembly

Abstract

The invention discloses an electromagnetic relay with strong impact resistance and convenient for automatic assembly, comprising a shell, a base, a contact part, a magnetic circuit part and a push card, wherein the contact part and the magnetic circuit part are respectively mounted on the base, and the push card is matched between the magnetic circuit part and the contact part, and the shell is mounted on the base and contains the contact part, the magnetic circuit part and the push card; in the base, two side walls with a certain height are provided at positions corresponding to the push card, and the tops of the two side walls are respectively provided with plug holes along the horizontal direction, and the two plug holes are respectively provided with openings leading upward; the two sides of the top of the push card are respectively provided with rotating shafts protruding outward; the rotating shafts on both sides of the push card are squeezed into the corresponding plug holes from top to bottom through the openings. The invention can not only improve the impact resistance of the product, but also avoid the influence of plastic powder generated when the push card and the base are matched on the product performance, and it is easy to realize the automatic assembly of the product.

Description

Technical Field

[0001] The invention relates to the technical field of relays, and in particular to an electromagnetic relay which has strong impact resistance and is convenient for automatic assembly. Background Art

[0002] A relay is an electronic control device that has a control system (also called an input circuit) and a controlled system (also called an output circuit). It is usually used in automatic control circuits. It is actually an "automatic switch" that uses a smaller current to control a larger current. Therefore, it plays the role of automatic regulation, safety protection, and circuit conversion in the circuit.

[0003] Electromagnetic relays usually include a housing, a base, a contact part, a magnetic circuit part and a push card. The contact part and the magnetic circuit part are respectively mounted on the base, and the push card is connected between the magnetic circuit part and the contact part. The housing is mounted on the base and contains the contact part, the magnetic circuit part and the push card. When the magnetic circuit part is working, the armature in the magnetic circuit part drives the push card to move, and the push card drives the moving spring in the contact part to move, thereby realizing the contact or separation between the moving contact on the moving spring in the contact part and the static contact on the static spring in the contact part. The push card in the prior art is usually mounted between the moving spring of the contact part and the armature of the magnetic circuit part. When the product is subjected to external impact or vibration, the push card is easy to fall off from the moving spring and the armature, causing product failure. In order to resist impact, one method of the prior art is to install the push card on the base, that is, to set a rotating shaft at the bottom end of the push card, and set a socket on the base, and the rotating shaft at the bottom end of the push card is inserted into the socket of the base. Although this push card structure can resist impact and is not easy to fall off, due to friction when the rotating shaft of the push card is installed in the socket of the base, wear plastic powder is generated. When the plastic powder accumulates to a certain amount, it will cause mechanical rotation to fail, thereby affecting the normal use of the product. On the other hand, it is difficult to achieve automated assembly by matching the rotating shaft of the push card with the socket of the base. Summary of the invention

[0004] The purpose of the present invention is to overcome the shortcomings of the prior art and provide an electromagnetic relay with strong impact resistance and convenient for automatic assembly. Through structural improvement, the impact resistance of the product can be improved, and the influence of plastic powder generated when the push card and the base are matched on the product performance can be avoided, and the automatic assembly of the product can be easily realized.

[0005] The technical solution adopted by the present invention to solve its technical problems is: an electromagnetic relay with strong impact resistance and convenient for automatic assembly, comprising a shell, a base, a contact part, a magnetic circuit part and a push card, the contact part and the magnetic circuit part are respectively installed on the base, the push card is matched between the magnetic circuit part and the contact part, the shell is installed on the base and accommodates the contact part, the magnetic circuit part and the push card; in the base, two side walls with a certain height are provided at the position corresponding to the push card, the top ends of the two side walls are respectively provided with plug holes along the horizontal direction, and the two plug holes are respectively provided with openings leading upward; the two sides of the top of the push card are respectively protruding outwards and provided with rotating shafts; the rotating shafts on both sides of the push card are squeezed into the corresponding plug holes from top to bottom through the openings; the bottom surfaces of the two plug holes are also provided with downwardly concave grooves, so that plastic powder generated by mechanical wear during the operation of the rotating shafts can fall from the plug holes; the notch of the groove is smaller than the diameter of the rotating shaft.

[0006] The opening of the socket of the base is set to be wide at the top and narrow at the bottom, so as to guide the rotating shaft of the push card into the corresponding socket. The width of the upper wide part of the opening is greater than the diameter of the rotating shaft, and the width of the lower narrow part of the opening is slightly smaller than the diameter of the rotating shaft. The width of the lower narrow part of the opening is also smaller than the diameter of the socket.

[0007] In the shell, a first convex rib is provided at the assembly position of the rotating shaft corresponding to the push card, and when the shell is matched with the base, the first convex rib of the shell abuts against the corresponding rotating shaft of the push card to limit the upward movement of the push card.

[0008] Stoppers are provided near the rotating shafts on both sides of the top of the push card. When the rotating shafts on both sides of the top of the push card are respectively adapted to the insertion holes on the two side walls of the base, the stoppers on both sides of the top of the push card are respectively attached to the inner side of the two side walls to prevent the push card from moving horizontally.

[0009] The push card is roughly L-shaped, and the rotating shaft is arranged at the top of the vertical side of the L-shape of the push card. The horizontal side of the L-shape of the push card serves as a push arm and contacts and cooperates with the movable spring sheet of the contact part. The vertical side of the L-shape of the push card is plate-shaped, and the side of the vertical side of the L-shape of the push card that is away from the movable spring sheet contacts and cooperates with the armature of the magnetic circuit part.

[0010] The armature is bent into a roughly L-shape, and the bent portion of the armature fits in the knife edge of the yoke of the magnetic circuit part, and the horizontal side of the L-shape of the armature fits in with the pole surface of the top of the iron core of the magnetic circuit part, and the end of the vertical side of the L-shape of the armature contacts and fits in with the side of the vertical side of the L-shape of the push card that is away from the moving spring piece, so that the small-pitch action of the armature can drive the large-pitch action of the moving spring piece after the secondary amplification of the coordination among the armature, the push card and the moving spring piece.

[0011] The L-shaped vertical side of the push card is also provided with a guide rib protruding outward on a side facing away from the moving spring piece to facilitate the automatic assembly of the armature; the guide rib is distributed up and down, and the guide rib protrudes outward gradually from top to bottom.

[0012] The lower and middle parts of both sides of the L-shaped vertical side of the push card are also provided with isolation ribs extending in the direction of the magnetic circuit to increase the creepage distance between the coil and the contact.

[0013] The magnetic circuit part also includes a coil frame and enameled wire; the iron core is installed in the through hole of the coil frame, and the through hole of the coil frame is installed vertically, the enameled wire is wound around the coil frame, the yoke is L-shaped, the horizontal side of the L-shaped yoke is fixed to the bottom end of the iron core, and the top of the vertical side of the L-shaped yoke is set as the blade of the yoke.

[0014] In the shell, a second convex rib and a third convex rib are respectively provided downward at positions corresponding to the armature and the yoke; when the shell is matched with the base, the second convex rib of the shell abuts against the armature to limit the upward movement of the armature, and the third convex rib of the shell abuts against the yoke to prevent the magnetic circuit part from moving upward.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] 1. The present invention adopts a method in which two side walls with a certain height are provided in the base at positions corresponding to the push cards, the tops of the two side walls are respectively provided with plug holes along the horizontal direction, and the two plug holes are respectively provided with openings leading upward; the two sides of the top of the push card are respectively provided with rotating shafts protruding outward; the rotating shafts on both sides of the push card are squeezed into the corresponding plug holes from top to bottom through the openings; the bottom surfaces of the two plug holes are also provided with downwardly concave grooves so that plastic powder generated by mechanical wear during the working process of the rotating shaft can fall from the plug holes; the notch of the groove is smaller than the diameter of the rotating shaft. The structure of the present invention utilizes the jack of the base to cooperate with the rotating shaft of the push card, so that the impact resistance of the product can be improved. Even if the product is subjected to a large impact, the push card is not easy to be separated from the base. The present invention utilizes the jack to be provided with an opening that leads upward, and the rotating shaft of the push card is arranged at the top of the push card. When the push card is assembled, the push card is installed into the base from top to bottom, which makes it easy to realize automatic assembly of the product. The present invention utilizes the bottom surface of the jack to be provided with a groove that is recessed downward, and the notch of the groove is smaller than the diameter of the rotating shaft. In this way, without affecting the support of the jack for the rotating shaft of the push card, plastic powder generated by mechanical wear during the working process of the rotating shaft can be allowed to fall from the jack, thereby avoiding the influence of the plastic powder generated when the push card cooperates with the base being collected in the jack and causing mechanical rotation failure.

[0017] 2. The present invention adopts a structure in which a first convex rib is provided in the housing at the position corresponding to the assembly position of the rotating shaft of the push card. The structure of the present invention uses the first convex rib of the housing to abut against the corresponding rotating shaft of the push card, so as to limit the upward movement of the push card and prevent the push card from moving upward.

[0018] 3. The present invention adopts the method of providing blocks near the rotating shafts on both sides of the top of the push card. The blocks on both sides of the top of the push card are respectively attached to the inner side of the two side walls to prevent the push card from moving horizontally.

[0019] 4. The present invention adopts the method of making the end of the L-shaped vertical side of the armature contact and cooperate with the side of the L-shaped vertical side of the push card that is away from the movable spring piece, and cooperating with arranging the rotating shaft of the push card at the top and arranging the push arm of the push card at the bottom, and using the push arm rotating around the upper end to push the movable spring piece rotating around the lower end, so that the small-pitch action of the armature can drive the large-pitch action of the movable spring piece after the secondary amplification of the coordination among the armature, the push card and the movable spring piece.

[0020] 5. The present invention adopts a guide rib that protrudes outward on the side of the L-shaped vertical side of the push card facing away from the moving spring, and the guide ribs are distributed up and down and gradually protrude outward from top to bottom. This structure of the present invention can facilitate the armature to be installed into the magnetic circuit part from top to bottom by using the guide ribs, thereby realizing automatic assembly.

[0021] 6. The present invention adopts a method in which a second convex rib and a third convex rib are respectively provided downwardly in the housing at positions corresponding to the armature and the yoke; the second convex rib of the housing is used to abut against the armature to limit the upward movement of the armature, and the third convex rib of the housing is used to abut against the yoke to prevent the magnetic circuit part from moving upward.

[0022] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments; however, the electromagnetic relay with strong impact resistance and convenient automatic assembly of the present invention is not limited to the embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the exploded three-dimensional structure of an embodiment of the present invention;

[0024] Figure 2 is a top view of an embodiment of the present invention;

[0025] Figure 3 along Figure 2 Sectional view along line AA;

[0026] Figure 4 along Figure 2 Sectional view along line AA (showing the components behind the side walls);

[0027] Figure 5 along Figure 2 Sectional view along the midline BB;

[0028] Figure 6 A schematic diagram of the three-dimensional structure of an embodiment of the present invention (excluding the housing);

[0029] Figure 7 A schematic diagram of a three-dimensional structure of a base according to an embodiment of the present invention;

[0030] Figure 8 A front view of a base of an embodiment of the present invention;

[0031] Fig. 9 A schematic diagram of a three-dimensional structure of a housing according to an embodiment of the present invention;

[0032] Fig.10 A schematic diagram of the three-dimensional structure of the housing of an embodiment of the present invention (showing the structure inside the housing through perspective);

[0033] Fig.11 A schematic diagram of the three-dimensional structure of the housing of an embodiment of the present invention (bottom facing forward);

[0034] Fig.12 A schematic diagram of the three-dimensional structure of a push card according to an embodiment of the present invention;

[0035] Fig.13 A schematic diagram of the three-dimensional structure of a push card according to an embodiment of the present invention (rotated at one angle). DETAILED DESCRIPTION

[0036] Example

[0037] See also Figures 1 to 13As shown, an electromagnetic relay with strong impact resistance and convenient for automatic assembly of the present invention comprises a housing 1, a base 2, a contact portion 3, a magnetic circuit portion 4 and a push card 5, wherein the contact portion 3 and the magnetic circuit portion 4 are respectively mounted on the base 2, and the push card 5 is matched between the magnetic circuit portion 4 and the contact portion 3, and the housing 1 is mounted on the base 2 and accommodates the contact portion 3, the magnetic circuit portion 4 and the push card 5; in this embodiment, the contact portion 3 comprises two movable springs 31, two normally open The static spring 32 and two normally closed static springs 33, the bottoms of two moving springs 31, two normally open static springs 32 and two normally closed static springs 33 are respectively mounted on the base 2, the top of the moving spring 31 is equipped with a moving contact, the top of the normally open static spring 32 is equipped with a normally open static contact, the top of the normally closed static spring 33 is equipped with a normally closed static contact, and the contact part 3 is a two-group conversion type contact structure; the magnetic circuit part 4 includes a coil frame 41, an enameled wire 42, an iron core 43, a yoke 44 and an armature 45; in the base 2, in the pair Two side walls 21 with a certain height should be provided at the position of the push card. The moving direction of the dynamic and static contacts of the relay is taken as the length direction of the relay, and the two side walls 21 are located on both sides of the width of the relay. The tops of the two side walls 21 are respectively provided with plug holes 22 along the horizontal direction, and the two plug holes 22 are respectively provided with openings 23 that lead upward; the two sides of the top of the push card 5 are respectively provided with rotating shafts 51 protruding outward; the rotating shafts 51 on both sides of the push card are squeezed into the corresponding plug holes 22 from top to bottom through the openings 23, so that the push card 5 is matched in the base 2; the bottom surfaces of the two plug holes 22 are also provided with recessed grooves 24 that are recessed downwards, so that the plastic powder generated by the machinery during the working process of the rotating shaft 51 of the push card 5 can fall from the insert holes 22; the notch of the recess 24 is smaller than the diameter of the rotating shaft 51. If the notch of the recess 24 is not smaller than the diameter of the rotating shaft 51 of the push card 5, the insert hole 22 cannot support the rotating shaft 51 of the push card 5.

[0038] In this embodiment, the opening 23 of the socket 22 of the base 2 is set to be wide at the top and narrow at the bottom, so as to guide the rotating shaft 51 of the push card 5 into the corresponding socket 22. The width of the upper wide part of the opening 23 is greater than the diameter of the rotating shaft 51, and the width of the lower narrow part of the opening 23 is slightly smaller than the diameter of the rotating shaft 51. The width of the lower narrow part of the opening 23 is also smaller than the diameter of the socket 22.

[0039] In this embodiment, a first rib 11 is provided in the shell 1 at the assembly position of the rotating shaft 51 corresponding to the push card 5 and protrudes downward. When the shell 1 is matched with the base 2, the first rib 11 of the shell 1 presses against the corresponding rotating shaft 51 of the push card 5 to limit the upward movement of the push card 5.

[0040] In this embodiment, blocks 52 are provided near the rotating shafts on both sides of the top of the pushing card 5. When the rotating shafts 51 on both sides of the top of the pushing card 5 are respectively adapted to the insertion holes 22 of the two side walls 21 of the base 2, the blocks 52 on both sides of the top of the pushing card 5 are respectively attached to the inner side of the two side walls 21 to prevent the pushing card 5 from moving laterally.

[0041] In this embodiment, the push card 5 is roughly L-shaped, and the rotating shaft 51 is arranged at the top of the L-shaped vertical side 53 of the push card. The L-shaped horizontal side 54 of the push card serves as a push arm to contact and cooperate with the movable spring piece 31 of the contact part. The L-shaped vertical side 53 of the push card 5 is plate-shaped, and the side of the L-shaped vertical side 53 of the push card that is away from the movable spring piece 31 contacts and cooperates with the armature 45 of the magnetic circuit part 4.

[0042] In this embodiment, the armature 45 is bent into a roughly L-shape, and the bent portion 451 of the armature is matched with the cutting edge of the yoke 44 of the magnetic circuit part, and the horizontal side 452 of the L-shape of the armature 45 is matched with the pole surface of the top of the iron core 43 of the magnetic circuit part, and the end of the vertical side 453 of the L-shape of the armature is matched with the side of the vertical side 53 of the L-shape of the push card 5 that is away from the moving spring sheet, so that the small-pitch action of the armature can drive the large-pitch action of the moving spring sheet after the secondary amplification of the coordination among the armature, the push card and the moving spring sheet.

[0043] In this embodiment, the L-shaped vertical side 53 of the push card 5 is also provided with a guide rib 55 protruding outward on the side facing away from the movable spring sheet to facilitate the automatic assembly of the armature 45; the guide rib 55 is distributed up and down, and the guide rib 55 gradually protrudes outward from top to bottom.

[0044] In this embodiment, isolation ribs 56 extending toward the magnetic circuit direction are provided at the middle and lower parts of both sides of the L-shaped vertical side 53 of the push card 5 to increase the creepage distance between the coil and the contact.

[0045] In this embodiment, the magnetic circuit part 4 also includes a coil frame 41 and an enameled wire 42; the iron core 43 is installed in the through hole of the coil frame 41, and the through hole of the coil frame 41 is installed vertically, the enameled wire 42 is wound around the coil frame 41, and the yoke 44 is L-shaped, and the horizontal side 441 of the L-shaped yoke is fixed to the bottom end of the iron core 43, and the top of the vertical side 442 of the L-shaped yoke 44 is set as the blade of the yoke 44.

[0046] In this embodiment, a second rib 12 and a third rib 13 are respectively provided downwardly in the housing 1 at positions corresponding to the armature 45 and the yoke 44; when the housing 1 is matched with the base 2, the second rib 12 of the housing abuts against the bent portion 451 of the armature 45 to limit the upward movement of the armature 45, and the third rib 13 of the housing 1 abuts against the top of the L-shaped vertical side 442 of the yoke 44 to prevent the magnetic circuit part from moving upward.

[0047] The electromagnetic relay of the present invention has strong impact resistance and is convenient for automatic assembly. In the base 2, two side walls 21 with a certain height are provided at positions corresponding to the push cards, and the tops of the two side walls 21 are respectively provided with plug holes 22 along the horizontal direction, and the two plug holes 22 are respectively provided with openings 23 leading upward; the two sides of the top of the push card 5 are respectively provided with rotating shafts 51 protruding outward; the rotating shafts 51 on both sides of the push card 5 are squeezed into the corresponding plug holes 22 from top to bottom through the openings 23; the bottom surfaces of the two plug holes 22 are also provided with downwardly concave grooves 24, so that plastic powder generated by the machinery during the operation of the rotating shaft 51 can fall from the plug holes 22; the notch of the groove 24 is smaller than the diameter of the rotating shaft 51. The structure of the present invention utilizes the jack 22 of the base to cooperate with the shaft 51 of the push card, so as to improve the impact resistance of the product. Even if the product is subjected to a large impact, the push card 5 is not easy to be separated from the base 2. The present invention utilizes the jack 22 to be provided with an opening 23 that leads upward, and the shaft 51 of the push card is arranged at the top of the push card 5. When the push card 5 is assembled, the push card 5 is installed into the base 2 from top to bottom, so that the automatic assembly of the product can be easily realized. The present invention utilizes the bottom surface of the jack 22 to be provided with a groove 24 that is recessed downward, and the notch of the groove 24 is smaller than the diameter of the shaft 51. In this way, without affecting the support of the jack 22 for the shaft 51 of the push card, the plastic powder generated by mechanical wear during the working process of the shaft 51 can be allowed to fall from the jack 22, thereby avoiding the plastic powder generated when the push card 5 cooperates with the base 2 from being collected in the jack 22, thereby causing the mechanical rotation to fail.

[0048] The electromagnetic relay of the present invention has strong impact resistance and is easy to automatically assemble. A first convex rib 11 is provided in the housing 1 at the assembly position of the rotating shaft 51 corresponding to the push card 5. This structure of the present invention uses the first convex rib 11 of the housing to abut against the corresponding rotating shaft 51 of the push card to limit the upward movement of the push card 5 and prevent the push card 5 from moving upward. The present invention also uses the second convex rib 12 and the third convex rib 13 provided downward in the housing 1 at the positions corresponding to the armature and the yoke respectively; the second convex rib 12 of the housing 1 is used to abut against the armature 45 to limit the upward movement of the armature 45, and the third convex rib 13 of the housing 1 is used to abut against the yoke 44 to prevent the magnetic circuit part 4 from moving upward.

[0049] The electromagnetic relay of the present invention has strong impact resistance and is easy to automatically assemble. The end of the L-shaped vertical side 453 of the armature 45 is matched with the side of the L-shaped vertical side 53 of the push card 5 that is opposite to the moving spring piece, and the rotating shaft 51 of the push card 5 is arranged at the top, and the push arm 54 of the push card 5 is arranged at the bottom. The push arm 54 rotating around the upper end is used to push the moving spring piece 31 rotating around the lower end, so that the small-spacing action of the armature 45 can drive the large-spacing action of the moving spring piece 31 after the secondary amplification of the coordination between the armature, the push card and the moving spring piece. Figure 4 As shown, when the armature 45 is in motion, the end of the L-shaped vertical side 453 of the armature 45 pushes the L-shaped vertical side 53 of the push card 5 to rotate. The point where the end of the L-shaped vertical side 453 of the armature 45 contacts the L-shaped vertical side 53 of the push card 5 is the first action point. The stroke of the first action point is also the action stroke of the armature 45. The rotation radius of the rotating shaft from the first action point to the upper end of the push card 5 is smaller than the rotation radius of the root of the push arm 54 of the push card 5. At the same rotation angle, the action of the push arm 54 of the push card 5 The stroke is greater than the action stroke of the armature 45, which is the first amplification formed after the armature and the push card cooperate. The contact point between the push arm 54 of the push card 5 and the movable spring piece 31 is the second action point, and the action stroke of the second action point is also the action stroke of the push arm 54. Since the rotation radius from the second action point to the fixed root of the movable spring piece 31 is smaller than the rotation radius from the moving contact to the fixed root of the movable spring piece 31, the action stroke of the movable contact is greater than the action stroke of the push arm 54, which is the second amplification formed after the push card and the movable spring piece cooperate.

[0050] The electromagnetic relay of the present invention has strong impact resistance and is easy to automatically assemble. Blocks 52 are respectively provided near the rotating shafts 51 on both sides of the top of the push card 5. The blockers 52 on both sides of the top of the push card are respectively attached to the inner side of the two side walls 21 to prevent the push card 5 from moving horizontally. The present invention also adopts a guide rib 55 protruding outward on the side of the L-shaped vertical side 53 of the push card 5 that is away from the moving spring sheet, and the guide rib 55 is distributed up and down and gradually protrudes outward from top to bottom. This structure of the present invention can facilitate the armature 45 to be installed into the magnetic circuit part 4 from top to bottom by using the guide rib 55, thereby realizing automatic assembly.

[0051] The above is only a preferred embodiment of the present invention, and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technician familiar with the art can make many possible changes and modifications to the technical solution of the present invention by using the technical content disclosed above, or modify it into an equivalent equivalent embodiment without departing from the scope of the technical solution of the present invention. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solution of the present invention should fall within the scope of protection of the technical solution of the present invention.

Claims

1. An electromagnetic relay with strong impact resistance and convenient for automatic assembly, comprising a housing, a base, a contact part, a magnetic circuit part and a push card, wherein the contact part and the magnetic circuit part are respectively mounted on the base, and the push card is matched between the magnetic circuit part and the contact part, and the housing is mounted on the base and contains the contact part, the magnetic circuit part and the push card; characterized in that: In the base, two side walls with a certain height are provided at the position corresponding to the push card, and the tops of the two side walls are respectively provided with plug holes along the horizontal direction, and the two plug holes are respectively provided with openings leading upward; the two sides of the top of the push card are respectively provided with rotating shafts protruding outward; the rotating shafts on both sides of the push card are squeezed into the corresponding plug holes from top to bottom through the openings; the bottom surfaces of the two plug holes are also provided with downwardly concave grooves, so that plastic powder generated by mechanical wear during the operation of the rotating shaft can fall from the plug holes; the notch of the groove is smaller than the diameter of the rotating shaft.

2. The electromagnetic relay with strong impact resistance and convenient for automatic assembly according to claim 1, characterized in that: The opening of the socket of the base is set to be wide at the top and narrow at the bottom, so as to guide the rotating shaft of the push card into the corresponding socket. The width of the upper wide part of the opening is greater than the diameter of the rotating shaft, and the width of the lower narrow part of the opening is slightly smaller than the diameter of the rotating shaft. The width of the lower narrow part of the opening is also smaller than the diameter of the socket.

3. The electromagnetic relay with strong impact resistance and convenient for automatic assembly according to claim 1 or 2, characterized in that: In the shell, a first convex rib is provided at the assembly position of the rotating shaft corresponding to the push card, and when the shell is matched with the base, the first convex rib of the shell abuts against the corresponding rotating shaft of the push card to limit the upward movement of the push card.

4. The electromagnetic relay with strong impact resistance and convenient for automatic assembly according to claim 1 or 2, characterized in that: Stoppers are provided near the rotating shafts on both sides of the top of the push card. When the rotating shafts on both sides of the top of the push card are respectively adapted to the insertion holes on the two side walls of the base, the stoppers on both sides of the top of the push card are respectively attached to the inner side of the two side walls to prevent the push card from moving horizontally.

5. The electromagnetic relay with strong impact resistance and convenient for automatic assembly according to claim 1, characterized in that: The push card is roughly L-shaped, and the rotating shaft is arranged at the top of the vertical side of the L-shape of the push card. The horizontal side of the L-shape of the push card serves as a push arm and contacts and cooperates with the movable spring sheet of the contact part. The vertical side of the L-shape of the push card is plate-shaped, and the side of the vertical side of the L-shape of the push card that is away from the movable spring sheet contacts and cooperates with the armature of the magnetic circuit part.

6. The electromagnetic relay with strong impact resistance and convenient for automatic assembly according to claim 5, characterized in that: The armature is bent into a roughly L-shape, and the bent portion of the armature fits in the knife edge of the yoke of the magnetic circuit part, and the horizontal side of the L-shape of the armature fits in with the pole surface of the top of the iron core of the magnetic circuit part, and the end of the vertical side of the L-shape of the armature contacts and fits in with the side of the vertical side of the L-shape of the push card that is away from the moving spring piece, so that the small-pitch action of the armature can drive the large-pitch action of the moving spring piece after the secondary amplification of the coordination among the armature, the push card and the moving spring piece.

7. The electromagnetic relay with strong impact resistance and convenient for automatic assembly according to claim 6, characterized in that: The L-shaped vertical side of the push card is also provided with a guide rib protruding outward on a side facing away from the moving spring piece to facilitate the automatic assembly of the armature; the guide rib is distributed up and down, and the guide rib protrudes outward gradually from top to bottom.

8. The electromagnetic relay with strong impact resistance and convenient for automatic assembly according to claim 5, characterized in that: The lower and middle parts of both sides of the L-shaped vertical side of the push card are also provided with isolation ribs extending in the direction of the magnetic circuit to increase the creepage distance between the coil and the contact.

9. The electromagnetic relay with strong impact resistance and convenient for automatic assembly according to claim 6, characterized in that: The magnetic circuit part also includes a coil frame and enameled wire; the iron core is installed in the through hole of the coil frame, and the through hole of the coil frame is installed vertically, the enameled wire is wound around the coil frame, the yoke is L-shaped, the horizontal side of the L-shaped yoke is fixed to the bottom end of the iron core, and the top of the vertical side of the L-shaped yoke is set as the blade of the yoke.

10. The electromagnetic relay with strong impact resistance and convenient for automatic assembly according to claim 9, characterized in that: In the shell, a second convex rib and a third convex rib are respectively provided downward at positions corresponding to the armature and the yoke; when the shell is matched with the base, the second convex rib of the shell abuts against the armature to limit the upward movement of the armature, and the third convex rib of the shell abuts against the yoke to prevent the magnetic circuit part from moving upward.

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