Relay with high action reliability

Abstract

This invention discloses a relay with high operational reliability, comprising a base portion and a movable portion that can swing relative to the base portion. The movable portion includes a movable spring, an armature, and a first plastic body. The movable spring and the armature are assembled into a single unit via the first plastic body. The movable spring includes a movable spring body and a solder joint structure. The solder joint structure includes a connecting portion and a welding portion. The welding portion is connected to the movable spring body via the connecting portion. The welding portion includes a first welding structure and a second welding structure welded to the base portion. The first welding structure and the second welding structure are located on the same side of the connecting portion along the length direction of the armature. At least two welding structures can better ensure the connection strength between the movable spring and the base portion, making the solder joint structure less prone to detachment and improving the mechanical life of the relay. Simultaneously, the connection between the movable spring and the base portion via the first and second welding structures can better ensure conductivity and heat dissipation, thereby reducing the temperature rise at the solder joint.

Description

Technical Field

[0001] This invention relates to the field of electrical control device technology, and more specifically, to a relay with high operational reliability. Background Technology

[0002] Miniature electromagnetic relays, due to their advantages of small size, low coil power consumption, double-pole double-throw contact output capability, and high reliability, are widely used in network communication, medical equipment, testing equipment, security, and other fields. Existing miniature electromagnetic relays typically consist of a moving spring armature, a base, and a housing. The moving spring armature is formed by injection molding an armature, a permanent magnet, and a moving spring containing the moving contact, with the moving spring typically symmetrically distributed around the armature. The base is usually formed by injection molding a coil and a stationary spring with a stationary contact. The moving spring armature is positioned approximately at the center of the base, vertically supporting it. The moving spring is welded to the stationary spring on the base to form a single unit, and the housing is then attached to complete the electromagnetic relay. When the relay coil is energized or de-energized, the moving spring armature forms a rotation fulcrum with the support of the base, causing the armature to swing back and forth, thus connecting and disconnecting the circuit of the spring portion. Because the moving spring is fixed to the base by welding, the moving spring portion between the rotation fulcrum of the moving spring armature and the welding point will deform, generating a reaction force. This reaction force, combined with the magnetic field attraction generated after the coil is energized, ensures that the relay's operating voltage and release voltage meet the requirements and that the parameters are stable. In the aforementioned application areas, relays typically need to switch operations frequently, and in some operating scenarios, the product needs to operate reliably for over 100 million days. Therefore, the moving spring armature portion, as the actuating component, must possess excellent fatigue resistance and reliable parameter stability to meet the requirements of ultra-long service life and consistency.

[0003] However, the welding point between the moving spring and the base in the prior art is prone to stress fatigue, which may cause it to detach and fail, resulting in permanent failure of the relay. Summary of the Invention

[0004] This invention provides a relay with high operational reliability that can improve product lifespan.

[0005] The relay with high operational reliability according to embodiments of the present invention includes a base portion and a movable portion that can swing relative to the base portion. The movable portion includes a movable spring, an armature, and a first plastic body. The movable spring and the armature are assembled into a single unit via the first plastic body. The movable spring includes a movable spring body and a welding plate structure. The welding plate structure includes a connecting portion and a welding portion. The welding portion is connected to the movable spring body via the connecting portion. The welding portion includes a first welding structure and a second welding structure that are welded to the base portion. The first welding structure and the second welding structure are located on the same side of the connecting portion along the length direction of the armature.

[0006] According to some embodiments of the present invention, the welded portion is not coplanar with the moving spring body.

[0007] According to some embodiments of the present invention, the connecting portion is coplanar with the moving spring body;

[0008] A fold line is provided at the connection between the connecting part and the welding part, and the welding part is bent relative to the connecting part through the fold line.

[0009] According to some embodiments of the present invention, the portion of the welded part having the first welded structure and the second welded structure is bent relative to the moving spring body in a direction away from the base portion; or,

[0010] The portion of the welding section having the first welding structure and the second welding structure is bent relative to the moving spring body toward the base portion.

[0011] According to some embodiments of the present invention, the extension direction of the broken line is perpendicular to the length direction of the armature.

[0012] According to some embodiments of the present invention, along the length direction of the armature, the broken line is located on the other side of the connection relative to the first welding structure and the second welding structure.

[0013] According to some embodiments of the present invention, the moving spring body is provided with normally open moving contacts and normally closed moving contacts at both ends along the length direction of the armature, and the line connecting the normally open moving contacts and the normally closed moving contacts passes through the midpoint of the broken line.

[0014] According to some embodiments of the present invention, the welded portion includes:

[0015] The main body is connected to the moving spring body via the connecting part, and the first welding structure and the second welding structure are disposed on the main body; and

[0016] The widened portion is connected to the main body portion and, along the width direction of the armature, corresponds to the position of the first welded structure and / or the second welded structure.

[0017] According to some embodiments of the present invention, along the length direction of the armature, the first welding structure is closer to the connecting portion than the second welding structure;

[0018] The widened portion includes a first widened section and a second widened section, wherein the first widened section corresponds to the position of the first welded structure, and the second widened section corresponds to the position of the second welded structure;

[0019] Along the width direction of the armature, the size of the first widened section is smaller than the size of the second widened section.

[0020] According to some embodiments of the present invention, along the length direction of the armature, the first welding structure is closer to the connecting portion than the second welding structure;

[0021] The widened portion includes a first widened section and a second widened section, wherein the first widened section corresponds to the position of the first welded structure, and the second widened section corresponds to the position of the second welded structure;

[0022] The first widened section completely covers the location of the first welded structure in the length direction of the armature, and the second widened section completely covers the location of the second welded structure in the length direction of the armature.

[0023] According to some embodiments of the present invention, along the length direction of the armature, the starting point of the first widened section is closer to the connection portion relative to the first welded structure.

[0024] According to some embodiments of the present invention, the first welding structure and the second welding structure are provided on the side of the welding portion away from the moving spring body, and the widened portion is provided on the side of the welding portion facing the moving spring body.

[0025] According to some embodiments of the present invention, the moving spring body is provided with normally open moving contacts and normally closed moving contacts at both ends along the length direction of the armature, and the planes on which the normally open moving contacts and the normally closed moving contacts are located are coplanar with the pole surfaces of the armature; or, the planes on which the normally open moving contacts and the normally closed moving contacts are located are higher than the pole surfaces of the armature.

[0026] According to some embodiments of the present invention, the moving spring body is further provided with a recess on the side facing the welding sheet structure, and the recess is provided at the edge of the connection between the connecting portion and the moving spring body.

[0027] According to some embodiments of the present invention, the welded portion is coplanar with the moving spring body.

[0028] According to some embodiments of the present invention, the welded portion includes:

[0029] A bent section, one end of which is connected to the connecting portion; and

[0030] An extension section, one end of which is connected to the other end of the bent section; the first welding structure and the second welding structure are disposed in the extension section;

[0031] Wherein, the width of the portion where the bent section connects to the connecting portion is less than or equal to the width of the portion of the extension section where the first welding structure and the second welding structure are provided.

[0032] According to some embodiments of the present invention, the connecting portion includes:

[0033] A first connecting segment, one end of which is connected to the moving spring body; the width of the first connecting segment is greater than the width of the bent segment; and

[0034] The second connecting segment has one end connected to the other end of the first connecting segment, and the other end of the second connecting segment is connected to the bending segment; the first connecting segment is perpendicular to the second connecting segment.

[0035] One embodiment of the above invention has at least the following advantages or beneficial effects:

[0036] In the relay of this invention, the moving spring and the base are connected by a first welding structure and a second welding structure. The at least two welding structures better ensure the connection strength between the moving spring and the base, making it less likely for the solder joint structure to detach from the base, thus improving the mechanical life of the relay. Simultaneously, the connection between the moving spring and the base via the first and second welding structures better ensures conductivity and heat dissipation, thereby reducing the temperature rise at the solder joint. Attached Figure Description

[0037] Figure 1 The diagram shown is a three-dimensional schematic diagram of a relay according to the first embodiment of the present invention.

[0038] Figure 2 What is shown is Figure 1 A 3D diagram showing the exterior shell removed.

[0039] Figure 3 What is shown is Figure 1 Side view diagram with the outer casing removed.

[0040] Figure 4 What is shown is Figure 2 A schematic diagram of removing the second plastic body.

[0041] Figure 5 What is shown is Figure 3 A schematic diagram of removing the second plastic body.

[0042] Figure 6 The diagram shown is of the base section.

[0043] Figure 7 The diagram shown is of the coil and the iron core.

[0044] Figure 8 The diagram shown is of the stationary spring unit and coil terminals.

[0045] Figures 9 to 11 The diagrams shown are schematic representations of the movable part of the first embodiment of the present invention from three different perspectives.

[0046] Figures 12 to 14 The diagram shows three-dimensional schematic diagrams of the movable spring from three different perspectives according to the first embodiment of the present invention.

[0047] Figure 15 What is shown is Figure 13 A magnified view of the area at point X1.

[0048] Figure 16 What is shown is Figure 14 A magnified view of the area at X2 in the middle.

[0049] Figure 17 The diagram shown is a side view of the relay with its housing removed according to the second embodiment of the present invention.

[0050] Figure 18 What is shown is Figure 17 Side view of the moving reed.

[0051] Figure 19 What is shown is Figure 18 A magnified view of the area at X3.

[0052] Figure 20 and Figure 21 The diagrams shown are schematic representations of the movable portion of the relay according to the third embodiment of the present invention from two different perspectives.

[0053] Figure 22 What is shown is Figure 20 A schematic diagram of the moving reed.

[0054] Figure 23 The diagram shown is a schematic of the moving spring of the relay according to the fourth embodiment of the present invention.

[0055] Figure 24 The diagram shows the magnitude of the reaction force generated by the deformation of the solder sheet structure in an embodiment of the present invention.

[0056] The reference numerals in the attached figures are explained as follows:

[0057] 1. Outer shell

[0058] 2. Movable parts

[0059] 21. Armature

[0060] 22. Moving reed

[0061] 221. Moving spring body

[0062] 2211. Normally open contact

[0063] 2212. Normally closed moving contact

[0064] 2213. concave part

[0065] 222. Welding sheet structure

[0066] 223. Connecting part

[0067] 2231, First connecting section

[0068] 2232, Second connecting section

[0069] 224. Welding section

[0070] 225. Ontology Department

[0071] 2251. Bending section

[0072] 2252, Extension Section

[0073] 226. Widened section

[0074] 2261. First widened section

[0075] 2262, Second Widening Section

[0076] 227. Broken line

[0077] 228. First welded structure

[0078] 229. Second Welded Structure

[0079] 23. First plastic body

[0080] 24. Permanent magnet

[0081] 25. First Positioning Section

[0082] 3. Base section

[0083] 31. Coil

[0084] 32. Iron core

[0085] 33. Static Spring Unit

[0086] 331. Normally open stationary reed

[0087] 3311. Normally open stationary spring lead-out foot

[0088] 3312. Normally open stationary contact

[0089] 332. Normally closed stationary reed

[0090] 3321. Normally closed stationary spring lead-out foot

[0091] 3322, Normally Closed Stationary Contact

[0092] 333. Common end reed

[0093] 3331. Public End Outline Footer

[0094] 3332, Soldering station

[0095] 34. Coil terminals

[0096] 341. Leading out the foot

[0097] 35. Second plastic body

[0098] 351. Positioning groove

[0099] 36. Second positioning section

[0100] D1, Length direction

[0101] D2, Width Direction Detailed Implementation

[0102] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, they are provided so that the invention will be thorough and complete, and the concept of the exemplary embodiments will be fully conveyed to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and therefore their detailed description will be omitted.

[0103] like Figures 1 to 8 As shown, Figure 1 The diagram shown is a three-dimensional schematic diagram of a relay according to the first embodiment of the present invention. Figure 2 What is shown is Figure 1 A 3D schematic diagram with the outer shell 1 removed. Figure 3 What is shown is Figure 1 Side view diagram with outer shell 1 removed. Figure 4 What is shown is Figure 2 A schematic diagram showing the removal of the second plastic body 35. Figure 5 What is shown is Figure 3 A schematic diagram showing the removal of the second plastic body 35. Figure 6The diagram shown is of the base portion 3. Figure 7 The diagram shown is of the coil and the iron core 32. Figure 8 The diagram shown is of the stationary spring unit 33 and the coil terminal 34.

[0104] The relay of this invention includes a housing 1, a movable part 2, and a base part 3. The movable part 2 is disposed above the base part 3 and is swayable relative to the base part 3. The housing 1 covers the movable part 2 and the base part 3.

[0105] It is understood that the terms "comprising" and "having," and any variations thereof, in the embodiments of this invention are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units is not limited to the steps or units listed, but may optionally include steps or units not listed, or may optionally include other steps or components inherent to such processes, methods, products, or devices.

[0106] The base part 3 includes a coil 31, an iron core 32, a stationary spring unit 33, a coil terminal 34, and a second plastic body 35. The second plastic body 35 is assembled into a single unit by injection molding of the coil 31, the iron core 32, the stationary spring unit 33, and the coil terminal 34.

[0107] The coil 31 may include a coil frame and enameled wire, with the enameled wire wound around the outer periphery of the coil frame. The stationary spring unit 33 includes two normally open stationary springs 331, two normally closed stationary springs 332, and two common end springs 333.

[0108] The first end of the normally open stationary spring 331 is provided with a normally open stationary spring lead-out foot 3311 that exposes the side of the second plastic body 35, the first end of the normally closed stationary spring 332 is provided with a normally closed stationary spring lead-out foot 3321 that exposes the side of the second plastic body 35, and the first end of the common end spring 333 is provided with a common end lead-out foot 3331 that exposes the side of the second plastic body 35.

[0109] The second end of the normally open stationary spring 331 is provided with a normally open stationary contact 3312 that exposes the top surface of the second plastic body 35, the second end of the normally closed stationary spring 332 is provided with a normally closed stationary contact 3322 that exposes the top surface of the second plastic body 35, and the second end of the common end spring 333 is provided with a soldering station 3332 that exposes the top surface of the second plastic body 35.

[0110] In the base portion 3, the lead-out pin 341 of the coil terminal 34 is located at one end of the second plastic body 35, and the normally closed stationary spring lead-out pin 3321, the common terminal lead-out pin 3331 and the normally open stationary spring lead-out pin 3311 are arranged sequentially from one end of the second plastic body 35 to the other end of the second plastic body 35, while the normally open stationary spring lead-out pin 3311 is located at the other end of the second plastic body 35.

[0111] like Figure 2 As shown, a positioning groove 351 is provided on the side of the second plastic body 35. The position of the positioning groove 351 corresponds to the position of the soldering station 3332. It is used to accommodate the insert during the injection molding process so that the insert positions the soldering station 3332 and ensures the consistency of the relay parameters.

[0112] Specifically, during the process of assembling the coil 31, iron core 32, static spring unit 33, coil terminal 34, and second plastic body 35 into a single integral part by injection molding, the insert is placed in the injection mold and in the positioning groove 351 of the second plastic body 35 to realize the function of the positioning welding station 3332.

[0113] As an example, the positioning groove 351 can be trapezoidal in shape, with a smaller top and a larger bottom. On the one hand, the trapezoidal shape of the positioning groove 351 facilitates demolding; on the other hand, the larger bottom dimension of the positioning groove 351 helps to strengthen the insert.

[0114] like Figures 9 to 11 As shown, Figures 9 to 11 The diagram shows three different perspectives of the movable part 2 according to the first embodiment of the present invention. The movable part 2 includes two movable springs 22, an armature 21, a permanent magnet 24, and a first plastic body 23. The first plastic body 23 is assembled into a single unit by injection molding of the two movable springs 22, the armature 21, and the permanent magnet 24. The permanent magnet 24 can be disposed on the side of the armature 21 facing the base part 3. The two movable springs 22 are respectively disposed on two opposite sides of the armature 21 in the width direction D2. The two movable springs 22 can be symmetrically arranged with the armature 21 as the center.

[0115] like Figure 6 and Figure 11 As shown, the movable part 2 also includes a first positioning part 25, and the base part 3 also includes a second positioning part 36. The first positioning part 25 and the second positioning part 36 are positioned and engaged. The first positioning part 25 and the second positioning part 36 form a swing fulcrum, so that the movable part 2 can swing relative to the base part 3 with respect to the fulcrum.

[0116] As an example, the movable part 2 includes two first positioning parts 25, and the base part 3 includes two second positioning parts 36. The two first positioning parts 25 are spaced apart along the width direction D2 of the movable part 2 and are located at the middle position along the length direction D1 of the movable part 2. The two second positioning parts 36 are spaced apart along the width direction D2 of the base part 3 and are located at the middle position along the length direction D1 of the base part 3.

[0117] As an example, the first positioning part 25 can be a positioning groove, which is provided on the side of the movable part 2 facing the base part 3. The second positioning part 36 can be a positioning protrusion, which protrudes from the surface of the base part 3 facing the movable part 2, and the positioning protrusion can extend into the positioning groove to achieve positioning.

[0118] Of course, in other embodiments, the first positioning part 25 may also be a positioning protrusion, and the second positioning part 36 may be a positioning groove.

[0119] like Figures 12 to 14 As shown, Figures 12 to 14 The diagram shows three perspective views of the movable spring 22 according to the first embodiment of the present invention. The movable spring 22 includes a movable spring body 221 and a welded plate structure 222, which is connected to the movable spring body 221. The welded plate structure 222 is welded to the welding station 3332 of the base portion 3, so that the movable portion 2 forms a seesaw structure.

[0120] As an example, the moving spring body 221 has a long strip structure, and the welded sheet structure 222 is connected to the middle position of the moving spring body 221 in the length direction D1.

[0121] The moving spring body 221 has a normally open moving contact 2211 and a normally closed moving contact 2212 at both ends of the length direction D1. The normally open moving contact 2211 corresponds to the normally open stationary contact 3312 of the base part 3, and the normally closed moving contact 2212 corresponds to the normally closed stationary contact 3322 of the base part 3.

[0122] Please continue reading. Figures 12 to 14 The welding plate structure 222 includes a connecting part 223 and a welding part 224. The welding part 224 is connected to the moving spring body 221 through the connecting part 223. The welding part 224 includes a first welding structure 228 and a second welding structure 229 that are welded to the base part 3. The first welding structure 228 and the second welding structure 229 are located on the same side of the connecting part 223 along the length direction D1 of the armature 21.

[0123] In this embodiment, the movable spring 22 is connected to the base portion 3 via a first welding structure 228 and a second welding structure 229. At least two welding structures better ensure the connection strength between the movable spring 22 and the base portion 3, making it less likely for the solder joint structure 222 to detach from the base portion 3, thus improving the mechanical life of the relay. Simultaneously, the connection between the movable spring 22 and the base portion 3 via the first welding structure 228 and the second welding structure 229 better ensures conductivity and heat dissipation, thereby reducing the temperature rise at the solder joint.

[0124] It is understandable that the first welding structure 228 and the second welding structure 229 are welded to the welding station 3332 of the common end spring 333, for example by laser welding, but not limited thereto.

[0125] As an example, the line connecting the first welding structure 228 and the second welding structure 229 is approximately parallel to the length direction D1 of the armature 21. In other words, when the first welding structure 228 and the second welding structure 229 are welded to the welding station 3332 of the base portion 3, the two weld points formed are linearly arranged along the length direction D1 of the armature 21.

[0126] It is understood that the first welded structure 228 and / or the second welded structure 229 can be a groove structure.

[0127] As an example, both the first welding structure 228 and the second welding structure 229 are groove structures, and both the first welding structure 228 and the second welding structure 229 are located on the side of the welding part 224 facing away from the moving spring body 221.

[0128] The groove wall of the groove structure can be arc-shaped to increase the length of the outline of the bonding between the solder pad structure 222 and the soldering station 3332 after laser irradiation, thereby improving the bonding force of the solder joint and extending the mechanical life of the relay.

[0129] It is understandable that the specific structures of the first welding structure 228 and the second welding structure 229 can be the same or different. For example, one of the first welding structure 228 and the second welding structure 229 can be a groove structure, and the other can be other structures capable of welding. When both the first welding structure 228 and the second welding structure 229 are groove structures, the dimensions of the two groove structures can be the same or different.

[0130] like Figure 12 and Figure 15 As shown, Figure 15 What is shown is Figure 13 A magnified view of a portion at point X1. The welded part 224 is not coplanar with the moving spring body 221.

[0131] As an example, the connecting part 223 is coplanar with the moving spring body 221. A fold line 227 is provided at the connection between the connecting part 223 and the welding part 224. The extension direction of the fold line 227 is perpendicular to the length direction D1 of the armature 21. The welding part 224 is bent relative to the connecting part 223 through the fold line 227. Thus, during the swinging of the movable part 2 relative to the base part 3, the deformation position in the weld plate structure 222 is around the fold line 227, thereby reducing the transmission of deformation stress to the weld point.

[0132] like Figure 15As shown, the portion of the welding part 224 with the first welding structure 228 and the second welding structure 229 is bent relative to the moving spring body 221 in a direction away from the base portion 3. That is, the welding part 224 is bent upward relative to the moving spring body 221 and the connecting part 223 by a fold line 227.

[0133] Combination Figure 3 and Figure 15 As shown, an angle β is formed between the welding part 224 and the moving spring body 221. When the first welding structure 228 and the second welding structure 229 of the welding part 224 are horizontally welded onto the welding station 3332, the moving spring body 221 is lower on the left and higher on the right. Therefore, when the portion of the welding part 224 with the first welding structure 228 and the second welding structure 229 is bent relative to the moving spring body 221 in a direction away from the base portion 3, the armature 21 near the coil terminal 34 is in contact with the pole surface of the iron core 32, which is a normally closed end; the armature 21 away from the coil terminal 34 is separated from the pole surface of the iron core 32, which is a normally open end.

[0134] It is understandable that the angle β between the welded part 224 and the moving spring body 221 can be adjusted according to the coil attraction force of the relay, thereby further improving the manufacturing qualification rate of the product and enhancing the parameter stability and margin of the product.

[0135] Along the length direction D1 of the armature 21, the broken line 227 is located on the other side of the connecting portion 223 relative to the first welded structure 228 and the second welded structure 229. In other words, along the length direction D1 of the armature 21, the first welded structure 228 and the second welded structure 229 are located on one side of the connecting portion 223, and the broken line 227 is located on the other side of the connecting portion 223.

[0136] Please continue reading. Figure 14 The line S connecting the normally open moving contact 2211 and the normally closed moving contact 2212 of the moving spring body 221 passes through the midpoint of the broken line 227. With this design, when the movable part 2 swings relative to the base part 3 and the moving contact of the moving spring 22 contacts the stationary contact of the stationary spring unit 33, the reaction force of the deformation of the moving spring 22 is approximately collinear with the broken line 227, thereby reducing the lateral torque of the moving spring 22, improving the stability of the swinging action of the movable part 2, extending the mechanical life, and improving the consistency and stability of product parameters.

[0137] It should be noted that the two ends of the connection S originate from the center point of the normally open moving contact 2211 and the center point of the normally closed moving contact 2212, respectively. For example, if both the normally open moving contact 2211 and the normally closed moving contact 2212 are a single contact, then the two ends of the connection S originate from the center point of each contact. If both the normally open moving contact 2211 and the normally closed moving contact 2212 include two contacts arranged side by side, then one end of the connection S originates from the center point of the two contacts of the normally open moving contact 2211, and the other end of the connection S originates from the center point of the two contacts of the normally closed moving contact 2212.

[0138] like Figure 9 As shown, the plane containing the normally open moving contact 2211 and the normally closed moving contact 2212 of the moving spring body 221 is higher than the pole surface of the armature 21, but this height difference is usually controlled to not exceed the overtravel value of the contact.

[0139] Of course, in other embodiments, the planes of the normally open moving contact 2211 and normally closed moving contact 2212 of the moving spring body 221 are coplanar with the pole surface of the armature 21. This makes the stress generated when the armature 21 contacts the iron core 32 of the base part 3 and the stress generated when the moving and stationary contacts contact each other basically reach a stable state at the same time, thereby reducing the lateral torque of the moving spring 22 and further improving the stability of the swinging action of the movable part 2.

[0140] like Figure 16 As shown, Figure 16 What is shown is Figure 14 A partial enlarged view at point X2. The moving spring body 221 is also provided with a recess 2213 on the side facing the welding sheet structure 222. The recess 2213 is provided at the edge of the connection between the connecting part 223 and the moving spring body 221.

[0141] As an example, along the length direction D1 of the armature 21, the two opposite sides of the connecting portion 223 are provided with recesses 2213. In this way, the length of the connecting portion 223 can be increased without increasing the overall width of the relay.

[0142] Furthermore, chamfers are provided at all corners of the recess 2213. The chamfer transition can reduce stress concentration. As an example, the chamfer can be in the shape of an arc, but it is not limited to this.

[0143] Continue reading Figure 16Along the length direction D1 of the armature 21, the first welded structure 228 is closer to the connecting portion 223 than the second welded structure 229. The welded portion 224 includes a body portion 225 and a widened portion 226. The body portion 225 is connected to the moving spring body 221 via the connecting portion 223, and the first welded structure 228 and the second welded structure 229 are disposed on the body portion 225. A fold line 227 is provided at the connection between the body portion 225 and the connecting portion 223. The widened portion 226 is connected to the body portion 225, and along the width direction D2 of the armature 21, the widened portion 226 corresponds to the position of the first welded structure 228 and / or the second welded structure 229.

[0144] By providing the widened portion 226, the rigidity of the weld point is improved, preventing stress from being transferred to the first welded structure 228 when the movable part 2 swings.

[0145] Furthermore, the main body 225 is provided with a widened portion 226 on the side facing the moving spring body 221, and the widened portion 226 corresponds to the position of the first welding structure 228 and / or the second welding structure 229.

[0146] As an example, the widened portion 226 includes a first widened section 2261 and a second widened section 2262. The first widened section 2261 corresponds to the position of the first welded structure 228, and the second widened section 2262 corresponds to the position of the second welded structure 229. Along the width direction D2 of the armature 21, the size of the first widened section 2261 is smaller than the size of the second widened section 2262.

[0147] The first widened section 2261 completely covers the position of the first welded structure 228 in the length direction D1 of the armature 21, and the second widened section 2262 completely covers the position of the second welded structure 229 in the length direction D1 of the armature 21.

[0148] Along the length direction D1 of the armature 21, the starting point of the first widened section 2261 is closer to the connecting portion 223 than the first welded structure 228. The starting point of the second widened section 2262 is located between the first welded structure 228 and the second welded structure 229.

[0149] By setting a first widening section 2261 and a second widening section 2262 of different widths in the welding part 224 at positions corresponding to the first welding structure 228 and the second welding structure 229, the attraction and reaction forces of the product are stably matched. This ensures that when the weld joint formed by the first welding structure 228 detaches during operation, the attraction and reaction force matching of the weld joint formed by the second welding structure 229 remains basically unchanged during operation. This ensures the stability of the relay's operating voltage and release voltage, and avoids permanent relay failure after a weld joint fails. This improves both the product's service life and its reliability.

[0150] Specifically, such as Figure 14 and Figure 24 As shown, Figure 24 This diagram illustrates the magnitude of the reaction force generated by the deformation of the solder pad structure according to an embodiment of the present invention. The reaction force F generated by the solder pad structure 222 is a = a(W*E*D*T). 3 ) / L 3 .

[0151] Where a is a constant, D represents the displacement (mm) of the weldment structure 222, which is related to the product structure and is constrained by the stroke of the armature 21 rotating around the fulcrum. E represents the elastic modulus (GPa) of the material of the weldment structure 222, and E is a constant. T represents the thickness (mm) of the weldment structure 222, and both the elastic modulus E and the thickness T are related to the material. W represents the width (mm) of the weld point location along the width direction D2 in the weldment structure 222 (i.e., the width of the location of the first welding structure 228 / second welding structure 229 in the weldment structure 222). L represents the length from the weld point D1 to the broken line 227 along the length direction.

[0152] This shows that after the relay product structure is finalized and the material of the solder pad structure 222 is selected, the value of F during relay use is mainly related to W / L. 3 The ratio is related. Therefore, to ensure that the value of F remains stable before and after the first welded structure 228 is detached, it is necessary to ensure that W / L... 3 The ratio is stable.

[0153] Therefore, in this embodiment, as Figure 14 As shown, let W1 be the width of the position where the first welding structure 228 is located in the weld sheet structure 222, and W2 be the width of the position where the second welding structure 229 is located. Let L1 be the length from the first welding structure 228 to the broken line 227, and L2 be the length from the second welding structure 229 to the broken line 227. Through size optimization, ensure that (W1 / L1...) 3 )≈(W2 / L2 3 This ensures the stability of the reaction force F when the first welding structure 228 is working and when the first welding structure 228 is disconnected and the second welding structure 229 is working, thereby ensuring that the matching of the relay's attraction force and reaction force remains basically unchanged, and ensuring the stability of the relay's operating voltage and release voltage.

[0154] Furthermore, the maximum stress σ when the weldment structure 222 deforms is σ=b*L / W*T 2 Where b is a constant.

[0155] Please continue reading. Figure 16The first welding structure 228 and the second welding structure 229 are provided on the side of the welding part 224 away from the moving spring body 221, and the widened part 226 is provided on the side of the welding part 224 facing the moving spring body 221.

[0156] The connecting part 223 includes a first connecting segment 2231 and a second connecting segment 2232 that are perpendicular to each other. One end of the first connecting segment 2231 is connected to the moving spring body 221, one end of the second connecting segment 2232 is connected to the other end of the first connecting segment 2231, and the other end of the second connecting segment 2232 is connected to the body part 225.

[0157] The connection between the first connecting section 2231 and the moving spring body 221, and the connection between the first connecting section 2231 and the second connecting section 2232, are provided with arc / rounded corner transitions to reduce stress concentration.

[0158] The first connecting segment 2231 extends along the length direction D1 perpendicular to the armature 21, and the second connecting segment 2232 extends along the length direction D1 parallel to the armature 21, and the second connecting segment 2232 extends from the first connecting segment 2231 to one of the moving contacts of the moving spring body 221.

[0159] The main body 225 is J-shaped and includes a bent section 2251 and an extension section 2252. One end of the bent section 2251 is connected to the other end of the second connecting section 2232, and the extension section 2252 is connected to the other end of the bent section 2251. A first welding structure 228 and a second welding structure 229 are provided on the extension section 2252. The bent section 2251 is bent at 180 degrees so that the extension section 2252 extends from the bent section 2251 toward another moving contact of the moving spring body 221. A fold line 227 is provided at the connection between the bent section 2251 and the second connecting section 2232.

[0160] Combination Figure 14 and Figure 16 As shown, the width t1 of the portion connecting the bent section 2251 and the connecting part 223 is less than or equal to the width t2 of the portion of the extension section 2252 where the first welding structure 228 and the second welding structure 229 are provided, i.e., t1 ≤ t2. Simultaneously, the width t3 of the first connecting section 2231 is greater than the width t1 of the bent section 2251, and greater than the width t2 of the portion of the extension section 2252 where the first welding structure 228 and the second welding structure 229 are provided, i.e., t3 > t1 and t3 > t2. This design effectively increases the rigidity of the armature component. When the armature swings, the deformation of the moving spring 22 occurs in the bent section 2251, which helps improve the stability of product parameters.

[0161] The first welding structure 228 and the second welding structure 229 are located on the side of the extension section 2252 facing away from the moving spring body 221, and the first widening section 2261 and the second widening section 2262 are located on the side of the extension section 2252 facing the moving spring body 221.

[0162] As an example, the width of the position where the broken line 227 is located in the weld sheet structure 222 is less than or equal to the width of the position where the first weld structure 228 and the second weld structure 229 are located.

[0163] like Figures 17 to 19 As shown, Figure 17 The diagram shown is a side view of the relay with the outer casing 1 removed according to the second embodiment of the present invention. Figure 18 What is shown is Figure 17 Side view of the moving reed 22. Figure 19 What is shown is Figure 18 A magnified view of a portion at X3. The similarities between the second and first embodiments will not be repeated here; the differences are as follows:

[0164] The portion of the welding part 224 with the first welding structure 228 and the second welding structure 229 is bent relative to the moving spring body 221 toward the base portion 3. That is, the welding part 224 is bent downward relative to the moving spring body 221 and the connecting part 223 by a fold line 227.

[0165] Combination Figure 17 and Figure 18 An angle β is formed between the welding part 224 and the moving spring body 221. When the first welding structure 228 and the second welding structure 229 of the welding part 224 are horizontally welded on the welding station 3332, the moving spring body 221 is higher on the left and lower on the right. Therefore, when the part of the welding part 224 with the first welding structure 228 and the second welding structure 229 is bent relative to the moving spring body 221 towards the base part 3, the armature 21 near the coil terminal 34 is in contact with the pole surface of the iron core 32, which is normally open; the armature 21 away from the coil terminal 34 is separated from the pole surface of the iron core 32, which is normally closed.

[0166] As can be seen, by setting the fold line 227, the welding part 224 can be folded up or down as needed, thereby facilitating the adaptive adjustment of the normally open and normally closed terminals of the relay according to the usage requirements.

[0167] like Figures 20 to 22 As shown, Figure 20 and Figure 21 The diagram shown is a schematic representation of the movable part 2 of the relay according to the third embodiment of the present invention from two different perspectives. Figure 22 What is shown is Figure 20A schematic diagram of the moving spring 22. The similarities between the third embodiment and the first and second embodiments will not be repeated here; the differences are as follows:

[0168] The weld sheet structure 222 does not have a broken line 227. Instead, the welding part 224, the connecting part 223 and the moving spring body 221 are arranged in the same plane.

[0169] like Figure 23 As shown, Figure 23 This diagram illustrates the moving spring 22 of the relay according to the fourth embodiment of the present invention. The similarities between the fourth embodiment and the above embodiments will not be repeated, but the differences are as follows:

[0170] When the product parameters are not sensitive to changes or the parameter margin is large, the widened part 226 is only provided in correspondence with the first welding structure 228, while the widened part 226 is not provided in correspondence with the second welding structure 229.

[0171] It is understood that the various embodiments / implementations provided by the present invention can be combined with each other without causing contradictions, and will not be described one by one here.

[0172] In the embodiments of the invention, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance; the term "multiple" refers to two or more unless otherwise explicitly defined. The terms "install," "connect," "link," and "fix" should be interpreted broadly. For example, "connect" can be a fixed connection, a detachable connection, or an integral connection; "link" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of the invention according to the specific circumstances.

[0173] In the description of the embodiments of the invention, it should be understood that the terms "upper", "lower", "left", "right", "front", "rear", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the invention and simplifying the description, and do not indicate or imply that the device or unit referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of the invention.

[0174] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0175] The above are merely preferred embodiments of the invention and are not intended to limit the scope of the invention. Those skilled in the art will recognize that various modifications and variations can be made to the invention. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the invention should be included within the protection scope of the invention.

Claims

1. A relay having high operation reliability, comprising a base portion and a movable portion swingable with respect to the base portion, the movable portion including a movable contact, an armature, and a first plastic body, the movable contact and the armature being assembled as a single piece by the first plastic body; characterized in that, The movable spring includes: moving spring body; The welding plate structure includes a connecting part and a welding part, wherein the welding part is connected to the moving spring body through the connecting part; the welding part includes a first welding structure and a second welding structure that are welded to the base part, wherein the first welding structure and the second welding structure are located on the same side of the connecting part along the length direction of the armature; The welding part includes a body part and a widening part. The body part is connected to the moving spring body through the connecting part. The first welding structure and the second welding structure are disposed on the body part. The widening part is connected to the body part and is along the width direction of the armature. The position of the widening part corresponds to the first welding structure and / or the second welding structure. Along the length direction of the armature, the first welded structure is closer to the connecting portion than the second welded structure; the widened portion includes a first widened section and a second widened section, the first widened section corresponds to the position of the first welded structure, and the second widened section corresponds to the position of the second welded structure; along the width direction of the armature, the size of the first widened section is smaller than the size of the second widened section.

2. The relay with high operation reliability according to claim 1, characterized by, The welded portion is not coplanar with the moving spring body.

3. The relay with high operation reliability according to claim 2, characterized by The connecting part is coplanar with the moving spring body; A fold line is provided at the connection between the connecting part and the welding part, and the welding part is bent relative to the connecting part through the fold line.

4. The relay with high operational reliability according to claim 3, characterized in that, The portion of the welded part having the first welding structure and the second welding structure is bent relative to the moving spring body in a direction away from the base portion; or... The portion of the welding section having the first welding structure and the second welding structure is bent relative to the moving spring body toward the base portion.

5. The relay with high operational reliability according to claim 3, characterized in that, The extension direction of the broken line is perpendicular to the length direction of the armature.

6. The relay with high operational reliability according to claim 3, characterized in that, Along the length of the armature, the broken line is located on the other side of the connection relative to the first welded structure and the second welded structure.

7. The relay with high operational reliability according to claim 3, characterized in that, The moving spring body is provided with normally open moving contacts and normally closed moving contacts at both ends along the length of the armature, and the line connecting the normally open moving contacts and the normally closed moving contacts passes through the midpoint of the broken line.

8. The relay with high operational reliability according to claim 1, characterized in that, Along the length of the armature, the first welded structure is closer to the connection portion than the second welded structure; The widened portion includes a first widened section and a second widened section, wherein the first widened section corresponds to the position of the first welded structure, and the second widened section corresponds to the position of the second welded structure; The first widened section completely covers the location of the first welded structure in the length direction of the armature, and the second widened section completely covers the location of the second welded structure in the length direction of the armature.

9. The relay with high operational reliability according to claim 8, characterized in that, Along the length of the armature, the starting point of the first widened section is closer to the connection portion relative to the first welded structure.

10. The relay with high operational reliability according to claim 1, characterized in that, The first welding structure and the second welding structure are located on the side of the welding portion facing away from the moving spring body, and the widened portion is located on the side of the welding portion facing the moving spring body.

11. The relay with high operational reliability according to claim 1, characterized in that, The moving spring body is provided with normally open moving contacts and normally closed moving contacts at both ends along the length direction of the armature. The planes on which the normally open moving contacts and the normally closed moving contacts are located are coplanar with the pole surfaces of the armature; or, the planes on which the normally open moving contacts and the normally closed moving contacts are located are higher than the pole surfaces of the armature.

12. The relay with high operational reliability according to claim 1, characterized in that, The moving spring body is also provided with a recess on the side facing the welding sheet structure, and the recess is located at the edge of the connection between the connecting part and the moving spring body.

13. The relay with high operational reliability according to claim 1, characterized in that, The welded portion is coplanar with the moving spring body.

14. The relay with high operational reliability according to claim 1, characterized in that, The welded portion includes: A bent section, one end of which is connected to the connecting portion; and An extension section, one end of which is connected to the other end of the bent section; the first welding structure and the second welding structure are disposed in the extension section; Wherein, the width of the portion where the bent section connects to the connecting portion is less than or equal to the width of the portion of the extension section where the first welding structure and the second welding structure are provided.

15. The relay with high operational reliability according to claim 14, characterized in that, The connecting part includes: A first connecting segment, one end of which is connected to the moving spring body; the width of the first connecting segment is greater than the width of the bent segment, and also greater than the width of the portion of the extension segment having the first welded structure and the second welded structure; and The second connecting segment has one end connected to the other end of the first connecting segment, and the other end of the second connecting segment is connected to the bending segment; the first connecting segment is perpendicular to the second connecting segment.

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