A kind of inverted plug-in structure of static spring and its plug-in method

Abstract

The present invention discloses an inverted plug-in structure of a static spring and a plug-in method thereof, the plug-in structure comprises a static spring and a coil frame; the coil frame is provided with a mounting portion for assembling the static spring; the mounting portion is provided with a guide convex bulge; the static spring is provided with a guide hole adapted to the guide convex bulge of the coil frame; when the static spring is assembled to the mounting portion of the coil frame, the guide hole of the static spring matches the guide convex bulge of the coil frame to improve the assembly accuracy between the static spring and the coil frame; after the static spring is assembled in place, the portion of the guide convex bulge extending out of the guide hole is hot-riveted, so that the portion of the guide convex bulge extending out of the guide hole is melted around the guide hole, forming a stable connection between the static spring and the coil frame, thereby improving the plug-in and pull-out force of the product. The present invention can effectively provide the pulling force between the plug-in matching structural parts without increasing the overall space and the complexity of the parts, and at the same time provide assembly accuracy.

Description

Technical Field

[0001] The invention relates to the technical field of electrical appliances, and in particular to an inverted plug-in structure and a plug-in method of a static spring suitable for a relay, a contactor or a circuit breaker. Background Art

[0002] Relays, contactors, or circuit breakers usually contain static springs to connect loads. Static springs are usually inserted into a support member, which can be a coil frame, a base, or other supporting structures. When the static spring is inverted, the lead-out pin part of the static spring is facing upward and installed into the support member, and when in use, the lead-out pin part of the static spring is usually facing downward. With the continuous expansion of the application fields of electrical appliances such as relays, contactors, and circuit breakers, their installation space is getting smaller and smaller, which also makes the size of small relays, small contactors, or small circuit breakers smaller and smaller. In order to achieve miniaturization, the small relays, small contactors, or small circuit breakers in the prior art are to directly insert the static spring into the coil frame. At the same time, for such small relays, small contactors, or small circuit breakers, the manufacturing and assembly precision requirements are getting higher and higher. In the plug-in matching structure, the allowed space is getting smaller and smaller. At the same time, the parts structure is required to be simple, resulting in insufficient insertion and extraction force between the matching structural parts during insertion, insufficient interference, resulting in changes in key dimensions of the product size during use and manufacturing, and reduced product performance. Summary of the invention

[0003] The purpose of the present invention is to overcome the shortcomings of the prior art and provide an inverted plug-in structure of a static spring and an insertion method thereof. Through structural improvement, it is possible to effectively provide a pulling force between the plug-in mating structural parts and provide assembly accuracy without increasing the overall space or the complexity of the parts.

[0004] The technical solution adopted by the present invention to solve its technical problems is: an inverted plug-in structure of a static spring, comprising a static spring and a coil frame; the coil frame is provided with a mounting portion for assembling the static spring, and the mounting portion is provided with a guide bulge; the static spring is provided with a guide hole adapted to the guide bulge of the coil frame; when the static spring is assembled to the mounting portion of the coil frame, the guide hole of the static spring cooperates with the guide bulge of the coil frame to improve the assembly accuracy between the static spring and the coil frame; after the static spring is assembled in place, the portion of the guide bulge extending out of the guide hole is hot-riveted, so that the portion of the guide bulge extending out of the guide hole is melted around the guide hole, forming a stable connection between the static spring and the coil frame, thereby improving the plug-in and pull-out force of the product.

[0005] A hole edge groove is also provided beside the upper hole edge of the guiding hole, and the molten body formed after the part of the guiding convex bulge extending out of the guiding hole is melted is filled in the hole edge groove.

[0006] The static spring includes a normally open static spring, and the mounting portion includes a first mounting portion for assembling the normally open static spring, the first mounting portion includes an end face of one end of the coil frame located next to the iron core hole of the coil frame; the normally open static spring is L-shaped, an outer side of one side of the L-shape of the normally open static spring fits on the end face, and the free end of the other side of the L-shape of the normally open static spring is set as a lead pin; in the coil frame, a guide convex bulge for assembling the normally open static spring is set on the end face; the guide hole of the normally open static spring is set on one side of the L-shape of the normally open static spring.

[0007] The first mounting portion also includes a first protrusion extending upward from one side of the end face, and a first slot is provided in the first protrusion; first clamps are respectively provided on both sides of the other side of the L-shape of the normally open static spring near the bending part; the first clamps on both sides of the other side of the L-shape of the normally open static spring are respectively inserted and fitted in the first slot and fit with interference.

[0008] The front part of the first clamping lugs on both sides of the other side of the L-shape of the normally open static spring along the insertion direction is also provided with a first chamfer; the first clamping lug of the normally open static spring is also provided with a barb for achieving interference fit and preventing withdrawal.

[0009] The static spring includes a normally closed static spring, and the mounting portion includes a second mounting portion for assembling the normally closed static spring, the second mounting portion includes a retaining wall protruding upward from the side of the end face of one end of the coil frame away from the iron core hole and arranged next to the iron core hole of the coil frame; the normally closed static spring is L-shaped, and the side of the inner side of one side of the L-shape of the normally closed static spring is fitted on the retaining wall, and a guide convex bulge for assembling the normally closed static spring is arranged in the coil frame next to the retaining wall; the guide hole of the normally closed static spring is arranged on one side of the L-shape of the normally closed static spring.

[0010] The second mounting portion also includes a second protrusion extending upward from the other side of the end face, and a second slot is provided in the second protrusion; the other side of the L-shape of the normally closed static spring is provided with second clamps on both sides; the other side of the L-shape of the normally closed static spring is plugged into the second slot and interference fits with the second slot of the coil frame through the second clamp.

[0011] The top of the retaining wall is also provided with at least one small notch.

[0012] The other side of the L-shape of the normally closed static spring is also extended to one side and is provided with an extension portion, and the extension portion is also accommodated in the second slot, and the second clamp on one side of the other side of the L-shape of the normally closed static spring is arranged on the outer side of the extension portion; the extension portion is also extended to the direction opposite to the other side of the L-shape of the normally closed static spring to provide a lead-out pin; in the outer side groove wall of the second slot, at the position corresponding to the junction of the lead-out pin and the bend of the L-shape of the normally closed static spring, a notch in the shape of an inclined surface is also provided.

[0013] It also includes a moving reed, the head of which is equipped with a normally open moving contact and a normally closed moving contact for correspondingly cooperating with the normally open static contact of the normally open static spring and the normally closed static contact of the normally closed static spring, and a yield chamfer is also provided at the position of the head of the moving reed corresponding to the guide convex bulge arranged next to the retaining wall.

[0014] The coil frame includes a winding post and flanges at both ends of the winding post. The first mounting portion and the second mounting portion are respectively arranged at one of the flanges of the coil frame. In the flange, ventilation gaps are respectively arranged on two sides along the distribution direction of the movable spring sheet.

[0015] A method for inverted insertion of a static spring, including a method for inverted insertion of a normally open static spring; the method for inverted insertion of a normally open static spring comprises the following steps:

[0016] A. Align the first chamfers of the first clamps on both sides of the other side of the L-shaped normally open static spring along the insertion direction with the first slots of the coil frame to achieve rough positioning between the normally open static spring and the coil frame;

[0017] B. Align the guide hole on one side of the L-shaped normally open static spring with the guide convex bulge of the coil frame for assembling the normally open static spring, so as to achieve precise positioning between the normally open static spring and the coil frame;

[0018] C. Continue to push the first clamping buds on both sides of the other side of the L-shaped normally open static spring into the first slot, and use the first clamping buds on both sides of the other side of the L-shaped normally open static spring to achieve interference fit with the first slot of the coil frame;

[0019] D. After the normally open static spring is assembled in place, the part of the guiding bud extending out of the guiding hole is hot-riveted to melt the part of the guiding bud extending out of the guiding hole, and the molten body formed after melting is filled in the hole edge groove next to the upper hole edge of the guiding hole to form a stable connection between the static spring and the coil frame, thereby improving the plug-in and pull-out force of the product.

[0020] Compared with the prior art, the beneficial effects of the present invention are:

[0021] 1. The present invention adopts the method that a guide convex bulge is provided in the installation part of the coil frame for assembling the static spring; a guide hole matching the guide convex bulge of the coil frame is provided in the static spring; when the static spring is assembled on the installation part of the coil frame, the guide hole of the static spring matches the guide convex bulge of the coil frame; after the static spring is assembled in place, the part of the guide convex bulge extending out of the guide hole is hot-riveted, so that the part of the guide convex bulge extending out of the guide hole is melted around the guide hole. This structure of the present invention can improve the assembly accuracy between the static spring and the coil frame by utilizing the cooperation between the guide convex bulge and the guide hole; by melting the part of the guide convex bulge extending out of the guide hole at the edge of the guide hole, a stable connection between the static spring and the coil frame can be formed, thereby improving the plug-in and pull-out force of the product.

[0022] 2. The present invention adopts the method of setting the normally open static spring to an L-shape, and fitting the outer side of one side of the L-shape of the normally open static spring to the end face. In the coil frame, a guide convex bump for assembling the normally open static spring is arranged on the end face; the guide hole of the normally open static spring is arranged on one side of the L-shape of the normally open static spring; first clamping bumps are respectively arranged on both sides of the other side of the L-shape of the normally open static spring near the bending part; the first clamping bumps on both sides of the other side of the L-shape of the normally open static spring are respectively inserted and fitted into the first slot of the coil frame and are interference fit, and the front parts of the first clamping bumps on both sides of the other side of the L-shape of the normally open static spring along the insertion direction are also provided with first chamfers. With this structure of the present invention, the first chamfer of the normally open static spring can be used to enter the first slot of the coil frame for rough positioning, and then the guide hole of the normally open static spring and the guide convex bud of the coil frame can be used to cooperate for fine positioning, and then the first clamping bud of the normally open static spring can be used to enter the first slot of the coil frame to clamp and fix the normally open static spring to the coil frame, and finally, the part of the guide convex bud extending out of the guide hole is melted to form a stable connection between the static spring and the coil frame, thereby improving the plug-in and pull-out force of the product.

[0023] 3. The present invention adopts the method of adding a retaining wall on the coil frame, and at least one small notch is designed on the retaining wall. The functions of the retaining wall are: providing positioning for the normally closed static spring to ensure the stability of parameters such as the contact gap; the retaining wall increases the creepage distance between the enameled wire and the static spring, and improves the dielectric withstand voltage level of the product; the small notch in the retaining wall is used to provide an air discharge outlet. When the relay, contactor or circuit breaker is disconnected, an arc is generated between the contacts. The arc generates high temperature and ionizes air molecules, resulting in a very high degree of ionization in the space around the contacts. The small notch designed at this time can allow the air of the contacts to dissipate as soon as possible, thereby reducing the degree of ionization of the air around the contacts.

[0024] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments; however, the inverted plug-in structure of a static spring and the plug-in method thereof of the present invention are not limited to the embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a schematic diagram of the three-dimensional structure of the first embodiment of the present invention;

[0026] Figure 2 is a schematic diagram of the assembly between the normally open static spring and the coil frame of the first embodiment of the present invention;

[0027] Figure 3 is a schematic diagram of a normally open static spring after being installed in a coil frame according to the first embodiment of the present invention;

[0028] Figure 4 is a cross-sectional view of the normally open static spring of the first embodiment of the present invention after being installed in the coil frame;

[0029] Figure 5 is a schematic diagram of the three-dimensional structure of the normally open static spring of the first embodiment of the present invention;

[0030] Figure 6 is a schematic diagram of the three-dimensional structure of the coil frame according to the first embodiment of the present invention;

[0031] Figure 7 1 is a schematic diagram of the assembly between the normally closed static spring and the coil frame of the first embodiment of the present invention;

[0032] Figure 8 Schematic diagram of the three-dimensional structure of the normally closed static spring of the first embodiment of the present invention;

[0033] Fig. 9 It is a schematic diagram of the coordination between the normally open static spring, the dynamic spring sheet and the coil frame of the second embodiment of the present invention;

[0034] Fig.10 Schematic diagram of the coordination between the normally open static spring, the dynamic spring sheet and the coil frame of the second embodiment of the present invention (flipped at an angle);

[0035] Fig.11 is a schematic diagram of the three-dimensional structure of the coil frame of the second embodiment of the present invention;

[0036] Fig.12 is a schematic diagram of the three-dimensional structure of the coil frame of the second embodiment of the present invention (flipped at an angle);

[0037] Fig.13 1 is a top view of a coil frame according to a second embodiment of the present invention. DETAILED DESCRIPTION

[0038] Embodiment 1

[0039] See also Figures 1 to 8As shown, an inverted plug-in structure of a static spring of the present invention comprises a static spring and a coil frame 1; the coil frame 1 is provided with a mounting portion for assembling the static spring, the static spring comprises a normally open static spring 2 and a normally closed static spring 3; the mounting portion comprises a first mounting portion for assembling the normally open static spring 2 and a second mounting portion for assembling the normally closed static spring.

[0040] In this embodiment, the first mounting portion includes an end face 12 of one end of the coil frame arranged next to the core hole 11 of the coil frame 1; the normally open static spring 2 is L-shaped, and the outer side of one side 21 of the L-shaped normally open static spring 2 is matched on the end face 12, and the free end of the other side 22 of the L-shaped normally open static spring 2 is set as a lead pin 23; in the coil frame, the end face 12 is provided with a guide convex bulge 13 for assembling the normally open static spring; one side 21 of the L-shaped normally open static spring is provided with a guide convex bulge 13 adapted to the coil frame 1 Guide hole 24; when the normally open static spring 2 is assembled on the first mounting portion of the coil frame 1, the guide hole 24 of the normally open static spring 2 cooperates with the guide convex bud 13 of the coil frame 1 to improve the assembly accuracy between the normally open static spring 2 and the coil frame 1; after the normally open static spring 2 is assembled in place, the portion of the guide convex bud 13 extending out of the guide hole 24 is hot-riveted to make the portion of the guide convex bud 13 extending out of the guide hole melt around the guide hole 24, forming a stable connection between the normally open static spring 2 and the coil frame 1, thereby improving the plug-in and pull-out force of the product.

[0041] In this embodiment, a hole edge groove 241 is further provided beside the upper hole edge of the guide hole 24 of the normally open static spring 2, and the melt formed by the melted portion of the guide convex bulge 13 extending out of the guide hole is filled in the hole edge groove 241. The height position of the melt is flush with or lower than the normally open static spring.

[0042] In this embodiment, the first mounting portion also includes a first protrusion 14 protruding upward from one side of the end face 12, and a first slot 15 is provided in the first protrusion 14; first clamping buds 25 are respectively provided on both sides of the other side 22 of the L-shape of the normally open static spring 2 near the bending part; the first clamping buds 25 on both sides of the other side 22 of the L-shape of the normally open static spring 2 are respectively inserted and fitted in the first slot 15 and are interference fit.

[0043] In this embodiment, the first clamping buds 25 on both sides of the other side of the L-shaped normally open static spring 2 are further provided with first chamfers 251 at the front along the insertion direction. The first clamping buds 25 of the normally open static spring 2 are also provided with barbs 252 for interference fit with the first slot 15 of the coil frame 1 and preventing withdrawal from the first slot 15.

[0044] In this embodiment, the second mounting portion includes a retaining wall 16 protruding upward from the side of the end face 12 of one end of the coil frame, which is located next to the iron core hole 11 of the coil frame 1, and is away from the iron core hole; the normally closed static spring 3 is L-shaped, and the side of the inner side of one side 31 of the L-shaped normally closed static spring 3 is matched on the retaining wall 16. In the coil frame 1, a guide convex bud 17 for assembling the normally closed static spring is provided next to the retaining wall 16, and one side 31 of the L-shaped normally closed static spring 3 is provided with a guide convex bud 17 adapted to the guide convex bud 17 of the coil frame 1. Guide hole 32; when the normally closed static spring 3 is assembled on the second mounting portion of the coil frame 1, the guide hole 32 of the normally closed static spring 3 cooperates with the guide convex bud 17 of the coil frame 1 to improve the assembly accuracy between the normally closed static spring 3 and the coil frame 1; after the normally closed static spring 3 is assembled in place, the portion of the guide convex bud 17 extending out of the guide hole 32 is hot-riveted to make the portion of the guide convex bud 17 extending out of the guide hole melt around the guide hole 32, forming a stable connection between the normally closed static spring 3 and the coil frame 1, thereby improving the plug-in and pull-out force of the product.

[0045] In this embodiment, a hole edge groove 321 is further provided beside the upper hole edge of the guiding hole 32 of the normally closed static spring 3 , and the molten body formed after the part of the guiding protrusion 17 extending out of the guiding hole is melted is filled in the hole edge groove 321 .

[0046] In this embodiment, the second mounting portion also includes a second protrusion 18 protruding upward from the other side of the end face 12, and a second slot 19 is provided in the second protrusion 18; the other side 33 of the L-shape of the normally closed static spring 3 is provided with second clamping buds 34 on both sides; the other side 32 of the L-shape of the normally closed static spring 3 is plugged into the second slot 19 and is interference fit with the second slot 19 of the coil frame 1 through the second clamping bud 34.

[0047] In this embodiment, two small notches 161 are further provided on the top of the retaining wall 16 .

[0048] In this embodiment, the other side 33 of the L-shape of the normally closed static spring 3 is also provided with an extension portion 35 extending to one side, and the extension portion 35 is also accommodated in the second slot 19. The second clamping bud 34 on one side of the other side 33 of the L-shape of the normally closed static spring 2 is arranged on the outer side of the extension portion 35; the extension portion 35 is also provided with a lead pin 36 extending in the direction opposite to the other side 33 of the L-shape of the normally closed static spring; in the groove wall on the outer side of the second slot 19, at the position corresponding to the junction of the lead pin 36 and the L-shape bend of the normally closed static spring, a notch 191 in the shape of an inclined surface is also provided. The function of the notch 191 is that when assembling the normally closed static spring 3, due to the overall space limitation, the force point during assembly is in the gap between the bend of the normally closed static spring and the lead pin, so the coil frame is designed with an inclined surface near this area, which can effectively give way to it, and at the same time will not reduce the creepage distance from the normally closed static spring to the enameled wire, so that the overall space design is minimized.

[0049] In this embodiment, a movable spring piece 4 is also included, and the head of the movable spring piece 4 is equipped with a normally open movable contact and a normally closed movable contact for correspondingly cooperating with the normally open static contact 26 of the normally open static spring 2 and the normally closed static contact of the normally closed static spring 3. A clearance chamfer 41 is also provided at the head of the movable spring piece 4 at a position corresponding to the guide convex bulge 17 arranged next to the retaining wall 16. This is to cooperate with the hot riveting guide convex bulge 17 of the normally closed static spring 3, and to make partial clearance at the head of the movable spring piece to save the overall space. Since this avoidance area is outside the path of the contact and the movable spring pin, it has no effect on the product performance and plays a role in reducing costs.

[0050] A method for inverted insertion of a static spring of the present invention includes an inverted insertion method for a normally open static spring 2; the inverted insertion method for the normally open static spring 2 includes the following steps:

[0051] A. Align the first chamfers 251 of the first clamping buds 25 on both sides of the other side 22 of the L-shape of the normally open static spring 2 along the insertion direction with the first slots 15 of the coil frame 1 and insert the first clamping buds 25 to achieve rough positioning between the normally open static spring 2 and the coil frame 1;

[0052] B. Align the guide hole 24 of one side 21 of the L-shape of the normally open static spring 2 with the guide convex bulge 13 of the coil frame 1 for assembling the normally open static spring 2, so as to achieve precise positioning between the normally open static spring 2 and the coil frame 1;

[0053] C. Continue to push the first clamping buds 25 on both sides of the other side 22 of the L-shaped normally open static spring 2 into the first slot 15, and use the first clamping buds 25 on both sides of the other side 22 of the L-shaped normally open static spring 2 to achieve interference fit with the first slot 15 of the coil frame;

[0054] D. After the normally open static spring 2 is assembled in place, the portion of the guiding bulge 13 extending out of the guiding hole 24 is hot-riveted to melt the portion of the guiding bulge 13 extending out of the guiding hole, and the molten body formed after melting is filled in the hole edge groove 241 next to the upper hole edge of the guiding hole 24, forming a stable connection between the static spring and the coil frame, thereby improving the plug-in and pull-out force of the product.

[0055] The present invention provides an inverted plug-in structure of a static spring and an insertion method thereof, wherein guide bulges 13, 17 are provided in the mounting portion of a coil frame 1 for assembling the static spring; guide holes 24, 32 adapted to the guide bulges 13, 17 of the coil frame 1 are provided in the static springs 2, 3; when the static springs 2, 3 are assembled to the mounting portion of the coil frame, the guide holes 24, 32 of the static springs 2, 3 match the guide bulges 13, 17 of the coil frame 1, and after the static springs 2, 3 are assembled in place, the portions of the guide bulges 13, 17 extending out of the guide holes are hot-riveted so that the portions of the guide bulges 13, 17 extending out of the guide holes are melted around the guide holes. This structure of the present invention utilizes the cooperation between the guide convex bud and the guide hole to improve the assembly accuracy between the static spring and the coil frame; by melting the part of the guide convex bud extending outside the guide hole to the hole edge of the guide hole, a stable connection between the static spring and the coil frame can be formed, thereby improving the insertion and extraction force of the product.

[0056] The present invention provides an inverted plug-in structure of a static spring and an insertion method thereof, wherein a normally open static spring 2 is set to an L-shape, and an outer side of one side 21 of the L-shape of the normally open static spring 2 is matched on the end face 12. In the coil frame 1, a guide convex bump 13 for assembling the normally open static spring is arranged on the end face 12; a guide hole 24 of the normally open static spring 2 is arranged on one side 21 of the L-shape of the normally open static spring; first clamping bumps 25 are respectively arranged on both sides of the other side 22 of the L-shape of the normally open static spring near the bending part; the first clamping bumps 25 on both sides of the other side 22 of the L-shape of the normally open static spring are respectively plugged and matched in the first slot 15 of the coil frame and are interference fit, and the front parts of the first clamping bumps 25 on both sides of the other side 22 of the L-shape of the normally open static spring along the insertion direction are also provided with first chamfers 251. With this structure of the present invention, the first chamfer 251 of the normally open static spring can be used to enter the first slot 15 of the coil frame for rough positioning, and then the guide hole 24 of the normally open static spring can be used to cooperate with the guide convex bud 13 of the coil frame for fine positioning, and then the first clamping bud 25 of the normally open static spring can be used to enter the first slot 15 of the coil frame to clamp and fix the normally open static spring to the coil frame, and finally, the part of the guide convex bud 13 extending out of the guide hole is melted to form a stable connection between the static spring and the coil frame, thereby improving the plug-in and pull-out force of the product.

[0057] The invention discloses an inverted plug-in structure of a static spring and a plug-in method thereof, wherein a retaining wall 16 is added to a coil frame 1, and at least one small notch 161 is designed on the retaining wall 16. The retaining wall 16 has the following functions: providing positioning for the normally closed static spring 3 to ensure the stability of parameters such as the contact gap; the retaining wall 16 increases the creepage distance between the enameled wire and the static spring, and improves the dielectric withstand voltage level of the product; the small notch 161 in the retaining wall is used to provide an air discharge outlet. When the relay, contactor or circuit breaker is disconnected, an arc is generated between the contacts. The arc generates high temperature and ionizes air molecules, resulting in a very high degree of ionization in the space around the contacts. At this time, the small notch designed can allow the air of the contacts to dissipate as quickly as possible, thereby reducing the degree of ionization of the air around the contacts.

[0058] Embodiment 2

[0059] See also Figures 9 to 13 As shown, a static spring flip-up plug-in structure of the present invention, the coil frame 1 includes a winding post 51 and flanges 52 at both ends of the winding post, the first mounting portion and the second mounting portion are respectively arranged at one of the flanges 52 (the lower flange according to the installation method of the relay) of the coil frame; the difference from the first embodiment is that the flange 52 (i.e., the lower flange) is further provided with ventilation notches 53 on the two sides along the distribution direction of the moving spring piece 4. The ventilation notch 53 cooperates with the exhaust port (i.e., the small notch 161) to reduce the concentration of air ionization (generated by arc) around the contact, and avoid arc breaking.

[0060] 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. A relay, comprising a static spring, a dynamic spring and a coil frame; the coil frame is provided with a mounting portion for assembling the static spring; the static spring is L-shaped, comprising one side and another side, wherein: A static contact is fixed on one side of the L-shape of the static spring; the characteristic is that: a guide convex bud is provided in the mounting portion; the guide convex bud is located between the other side of the L-shape of the static spring and the static contact; the free end of the other side of the L-shape of the static spring is a lead pin; the static spring is provided with a guide hole adapted to the guide convex bud of the coil frame; when the static spring is assembled on the mounting portion of the coil frame, the guide hole of the static spring matches with the guide convex bud of the coil frame to improve the assembly accuracy between the static spring and the coil frame; after the static spring is assembled in place, the part of the guide convex bud extending out of the guide hole is hot-riveted so that the part of the guide convex bud extending out of the guide hole is melted around the guide hole to form a stable connection between the static spring and the coil frame, thereby improving the plug-in and pull-out force of the product; the mounting portion also includes a convex portion, in which a slot is provided; the other side of the L-shape of the static spring is interference-fitted with the slot, and the head of the dynamic spring is provided with a dynamic contact for correspondingly matching with the static contact of the static spring, and the plug-in and pull-out direction is consistent with the action direction of the dynamic contact.

2. A relay according to claim 1, characterized in that: A hole edge groove is also provided beside the upper hole edge of the guiding hole, and the molten body formed after the part of the guiding convex bulge extending out of the guiding hole is melted is filled in the hole edge groove.

3. A relay according to claim 1 or 2, characterized in that: The static spring includes a normally open static spring, and the mounting portion includes a first mounting portion for assembling the normally open static spring, the first mounting portion includes an end face of one end of the coil frame located next to the iron core hole of the coil frame; the normally open static spring is L-shaped, an outer side of one side of the L-shape of the normally open static spring fits on the end face, and the free end of the other side of the L-shape of the normally open static spring is set as a lead pin; in the coil frame, a guide convex bulge for assembling the normally open static spring is set on the end face; the guide hole of the normally open static spring is set on one side of the L-shape of the normally open static spring.

4. A relay according to claim 3, characterized in that: The first mounting portion also includes a first protrusion extending upward from one side of the end face, and a first slot is provided in the first protrusion; first clamps are respectively provided on both sides of the other side of the L-shape of the normally open static spring near the bending part; the first clamps on both sides of the other side of the L-shape of the normally open static spring are respectively plugged into the first slot and fit with interference; the front part of the first clamps on both sides of the other side of the L-shape of the normally open static spring along the insertion direction is also provided with a first chamfer; the first clamps of the normally open static spring are also provided with barbs for achieving interference fit and preventing withdrawal.

5. A relay according to claim 3, characterized in that: The static spring also includes a normally closed static spring, and the mounting portion includes a second mounting portion for assembling the normally closed static spring, the second mounting portion includes a retaining wall protruding upward from the side of the end face of one end of the coil frame away from the iron core hole and arranged next to the iron core hole of the coil frame; the normally closed static spring is L-shaped, and the side of the inner side of one side of the L-shape of the normally closed static spring is fitted on the retaining wall, and a guide convex bulge for assembling the normally closed static spring is arranged in the coil frame next to the retaining wall; the guide hole of the normally closed static spring is arranged on one side of the L-shape of the normally closed static spring.

6. A relay according to claim 5, characterized in that: The second mounting portion also includes a second protrusion extending upward from the other side of the end face, and a second slot is provided in the second protrusion; the other side of the L-shape of the normally closed static spring is provided with second clamps on both sides; the other side of the L-shape of the normally closed static spring is plugged into the second slot and interference fits with the second slot of the coil frame through the second clamp.

7. A relay according to claim 6, characterized in that: The top of the retaining wall is also provided with at least one small notch.

8. A relay according to claim 6, characterized in that: The other side of the L-shape of the normally closed static spring is also extended to one side and is provided with an extension portion, and the extension portion is also accommodated in the second slot, and the second clamp on one side of the other side of the L-shape of the normally closed static spring is arranged on the outer side of the extension portion; the extension portion is also extended to the direction opposite to the other side of the L-shape of the normally closed static spring to provide a lead-out pin; in the outer side groove wall of the second slot, at the position corresponding to the junction of the lead-out pin and the bend of the L-shape of the normally closed static spring, a notch in the shape of an inclined surface is also provided.

9. A relay according to claim 5, characterized in that: It also includes a moving spring, the head of which is provided with a normally open moving contact and a normally closed moving contact for correspondingly cooperating with the normally open static contact of the normally open static spring and the normally closed static contact of the normally closed static spring, and a yield chamfer is also provided at the position of the head of the moving spring corresponding to the guide convex bud arranged next to the retaining wall; the coil frame includes a winding column and flanges at both ends of the winding column, the first mounting portion and the second mounting portion are respectively arranged at one of the flanges of the coil frame, and ventilation gaps are respectively provided on the two sides along the distribution direction of the moving spring in the flange.

10. A method for inverted insertion of a static spring, including an inverted insertion method for a normally open static spring; The inverted insertion method of the normally open static spring comprises the following steps: A. Align the first chamfers of the first clamps on both sides of the other side of the L-shaped normally open static spring along the insertion direction with the first slots of the coil frame to achieve rough positioning between the normally open static spring and the coil frame; B. Align the guide hole on one side of the L-shaped normally open static spring with the guide convex bulge of the coil frame for assembling the normally open static spring, so as to achieve precise positioning between the normally open static spring and the coil frame; C. Continue to push the first clamping buds on both sides of the other side of the L-shaped normally open static spring into the first slot, and use the first clamping buds on both sides of the other side of the L-shaped normally open static spring to achieve interference fit with the first slot of the coil frame; D. After the normally open static spring is assembled in place, the part of the guiding bud extending out of the guiding hole is hot-riveted to melt the part of the guiding bud extending out of the guiding hole, and the molten body formed after melting is filled in the hole edge groove next to the upper hole edge of the guiding hole to form a stable connection between the static spring and the coil frame, thereby improving the plug-in and pull-out force of the product.

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