relay

Abstract

The relay includes a base portion (3) and a movable portion (2) that can swing relative to the base portion (3). The movable portion (2) includes a movable spring piece (22), an armature (21), and a first plastic body (23). The movable spring piece (22) and the armature (21) are integrally assembled via the first plastic body (23). The movable spring piece (22) includes a movable spring body (221) and a welded piece structure (222). The structure (222) includes a connection portion (223) and a welded portion (224), the welded portion (224) is connected to the movable spring body (221) via the connection portion (223), the welded portion (224) includes a first welded structure (228) and a second welded structure (229) welded to the base portion (3), and the first welded structure (228) and the second welded structure (229) are arranged on the same side of the connection portion (223) along the longitudinal direction (D) of the armature.

Description

[Technical Field]

[0001] (Cross-reference citation) The present invention claims priority to Chinese Patent Application No. 202211210067.9, entitled "Relay with High Operational Reliability," filed on September 30, 2022, the entire contents of which are incorporated herein by reference.

[0002] (Technical field) FIELD OF THE INVENTION Embodiments of the present invention relate to the technical field of electrical control devices, and more particularly to relays with high operational reliability. [Background technology]

[0003] Due to their compact size, low coil power consumption, double-pole, double-throw contact output, and high reliability, microelectromagnetic relays are widely used in fields such as network communications, medical equipment, test equipment, and security. Conventional microelectromagnetic relays typically consist of a movable spring armature, a base, and a housing. The movable spring armature is formed by integrally injection molding a movable spring section including an armature, a permanent magnet, and a movable contact. The movable spring section is typically arranged symmetrically around the armature. The base section is typically formed by integrally injection molding a coil section and a fixed spring section with a fixed contact. The movable spring armature is supported and positioned vertically at approximately the center of the base section. The movable spring and the fixed spring on the base section are integrated by welding, and then the housing is attached to form the electromagnetic relay. When the relay coil is energized or de-energized, the movable spring armature forms a pivot point with the base support, driving the armature to swing back and forth, with the spring piece connecting or disconnecting the parts. Because the movable spring is welded to the base, deformation occurs between the pivot point of the movable spring armature and the welded spot, generating a reaction force. This reaction force cooperates with the magnetic attraction force generated by the coil after energization, ensuring that the relay's operating and release voltages meet requirements and stable parameters. In these applications, relays typically require frequent switching, with reliable operation times of over 100 million cycles depending on the application. Therefore, the movable spring armature, the operating component, must have excellent fatigue resistance and reliable parameter stability to meet the ultra-long life and stability requirements.

[0004] However, conventional weld spots between the movable spring and the base are prone to stress fatigue and risk failure to disengage, resulting in permanent failure of the relay. Summary of the Invention

[0005] Embodiments of the present invention provide a relay with high operational reliability that can extend the service life of a product.

[0006] A relay having high operational reliability according to an embodiment of the present invention includes a base portion and a movable portion swingable relative to the base portion, the movable portion including a movable spring piece, an armature, and a first plastic body, the movable spring piece and the armature being integrally assembled via the first plastic body, the movable spring piece including a movable spring body and a welded piece structure, The welded piece structure includes a connection portion and a welded portion, the welded portion is connected to the movable spring body via the connection portion, the welded portion includes a first welded structure and a second welded structure welded to the base portion, and the first welded structure and the second welded structure are arranged on the same side of the connection portion along the longitudinal direction of the armature.

[0007] According to some embodiments of the present invention, the weld is not flush with the movable spring body.

[0008] According to some embodiments of the present invention, the connection portion is positioned flush with the movable spring body, a fold line is provided at the connection portion between the connection portion and the welded portion, and the welded portion is bent relative to the connection portion via the fold line.

[0009] According to some embodiments of the present invention, the portion of the welded portion where the first welded structure and the second welded structure are provided is bent in a direction away from the base portion relative to the movable spring body, or the portion of the welded portion where the first welded structure and the second welded structure are provided is bent in a direction towards the base portion relative to the movable spring body.

[0010] According to some embodiments of the present invention, the extension direction of the folded line is perpendicular to the length direction of the armature.

[0011] According to some embodiments of the present invention, the fold line is located along the length of the armature on the other side of the connection relative to the first welded structure and the second welded structure.

[0012] According to some embodiments of the present invention, a normally open movable contact and a normally closed movable contact are provided at both ends of the movable spring body along the length of the armature, respectively, and a connection line between the normally open movable contact and the normally closed movable contact passes through the midpoint of the broken line.

[0013] According to some embodiments of the present invention, the welded portion includes a main body portion and an expanded portion, the main body portion is connected to the movable spring body via a connecting portion, the first welded structure and the second welded structure are disposed on the main body portion, and the expanded portion is connected to the main body portion and corresponds to the position of the first welded structure and / or the second welded structure along the width direction of the armature.

[0014] According to some embodiments of the present invention, along the length of the armature, the first welded structure is closer to the connection than the second welded structure, the widening portion includes a first widening section and a second widening section, the first widening section corresponds to the position of the first welded structure and the second widening section corresponds to the position of the second welded structure, and along the width of the armature, the size of the first widening section is smaller than the size of the second widening section.

[0015] According to some embodiments of the present invention, along the length of the armature, the first welded structure is closer to the connection than the second welded structure, the widening portion includes a first widening section and a second widening section, the first widening section corresponds to the position of the first welded structure, the second widening section corresponds to the position of the second welded structure, the first widening section completely covers the position of the first welded structure along the length of the armature, and the second widening section completely covers the position of the second welded structure along the length of the armature.

[0016] According to some embodiments of the invention, along the length of the armature, the beginning of the first widened section is closer to the connection than the first welded structure.

[0017] According to some embodiments of the present invention, the first welded structure and the second welded structure are located on one side of the weld away from the movable spring body, and the widened portion is located on one side of the weld facing the movable spring body.

[0018] According to some embodiments of the present invention, a normally open movable contact and a normally closed movable contact are respectively provided at both ends of the movable spring body along the length direction of the armature, and the planes on which the normally open movable contact and the normally closed movable contact are located are flush with the pole faces of the armature, or the planes on which the normally open movable contact and the normally closed movable contact are located are higher than the pole faces of the armature.

[0019] According to some embodiments of the present invention, a recess is further provided on one side of the movable spring body facing the welded piece structure, and the recess is disposed on an edge of a connecting portion between the connecting portion and the movable spring body.

[0020] According to some embodiments of the present invention, the weld is located flush with the moveable spring body.

[0021] According to some embodiments of the present invention, the welded portion includes a bent section and an extended section, one end of the bent section is connected to the connection portion and one end of the extended section is connected to the other end of the bent section, the first welded structure and the second welded structure are disposed in the extended section, and the width of the portion where the bent section and the connection portion are connected is smaller than or equal to the width of the portion of the extended section where the first welded structure and the second welded structure are provided.

[0022] According to some embodiments of the present invention, the connection portion includes a first connection section and a second connection section, one end of the first connection section is connected to the movable spring body, the width of the first connection section is greater than the width of the bent section, one end of the second connection section is connected to the other end of the first connection section, the other end of the second connection section is connected to the bent section, and the first connection section is perpendicular to the second connection section.

[0023] The above-described embodiments of the present invention have at least the following advantages or beneficial effects.

[0024] In the relay of the present invention, the movable spring piece and the base are connected via a first welded structure and a second welded structure. The use of at least two welded structures improves the connection strength between the movable spring piece and the base, making it less likely for the welded structure to come off the base, and improving the mechanical life of the relay. At the same time, because the movable spring piece is connected to the base via the first welded structure and the second welded structure, electrical conductivity and heat dissipation are improved, reducing the temperature rise at the weld spot. [Brief explanation of the drawings]

[0025] [Figure 1] 1 is a schematic perspective view of a relay according to a first embodiment of the present invention; [Figure 2] 2 shows a schematic perspective view of FIG. 1 with the housing removed. [Figure 3] 2 shows a schematic side view of FIG. 1 with the housing removed. [Figure 4] 3 shows the schematic view of FIG. 2 with the second plastic body removed. [Figure 5] 4 shows the schematic view of FIG. 3 with the second plastic body removed. [Figure 6] 1 shows a schematic diagram of a base part. [Figure 7] A schematic diagram of the coil and core is shown. [Figure 8] 1 shows a schematic diagram of a fixed spring unit and a coil terminal. [Figure 9] 1A-1D show schematic views of a movable part from three different points of view according to a first embodiment of the invention; [Figure 10] 1A-1D show schematic views of a movable part from three different points of view according to a first embodiment of the invention; [Figure 11] 1A-1D show schematic views of a movable part from three different points of view according to a first embodiment of the invention; [Figure 12A] 1 is a schematic perspective view of a movable spring piece according to a first embodiment of the present invention; [Figure 12B] FIG. 3 is a schematic perspective view of another movable spring piece in the first embodiment of the present invention. [Figure 13] 12B shows a schematic side view of FIG. [Figure 14A] 12B shows a schematic plan view of FIG. 12A. [Figure 14B] 12B shows a schematic plan view of FIG. [Figure 15] 14 is a partial enlarged view of the X1 portion of FIG. 13. [Figure 16] FIG. 14C is a partial enlarged view of the X2 portion in FIG. 14B. [Figure 17] 5A and 5B show schematic diagrams of a relay according to a second embodiment of the present invention from two different views; [Figure 18] 18 shows a schematic side view of the movable spring piece in FIG. 17. [Figure 19] 19 is a partial enlarged view of the X3 portion of FIG. 18. [Figure 20] 5A and 5B show schematic views of the moving part of a relay according to a third embodiment of the present invention from two different points of view; [Figure 21] 5A and 5B show schematic views of the moving part of a relay according to a third embodiment of the present invention from two different points of view; [Figure 22A] FIG. 10 is a schematic perspective view of a movable spring piece of a relay according to a third embodiment of the present invention. [Figure 22B] FIG. 10 is a schematic perspective view of another movable spring piece of a relay according to a third embodiment of the present invention. [Figure 23A] FIG. 10 is a schematic diagram of a movable spring piece of a relay according to a fourth embodiment of the present invention. [Figure 23B] FIG. 10 is a schematic diagram of another movable spring piece of a relay according to a fourth embodiment of the present invention. [Figure 24] 5 is a schematic diagram showing the size of a reaction force generated by deformation of a welded piece structure according to an embodiment of the present invention. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0026] Next, exemplary embodiments will be described more fully with reference to the drawings. However, exemplary embodiments may be implemented in various forms and should not be understood as being limited to the embodiments set forth herein. Rather, these embodiments are provided so as to comprehensively and completely convey the concept of exemplary embodiments to those skilled in the art. In the drawings, the same reference numerals indicate the same or similar structures, and detailed descriptions thereof will be omitted.

[0027] As shown in FIGS. 1 to 8, FIG. 1 shows a schematic perspective view of a relay according to a first embodiment of the present invention. FIG. 2 shows a schematic perspective view of FIG. 1 with the housing 1 removed. FIG. 3 shows a schematic side view of FIG. 1 with the housing 1 removed. FIG. 4 shows a schematic view of FIG. 2 with the second plastic body 35 removed. FIG. 5 shows a schematic view of FIG. 3 with the second plastic body 35 removed. FIG. 6 shows a schematic view of the base portion 3. FIG. 7 shows a schematic view of the coil and iron core 32. FIG. 8 shows a schematic view of the fixed spring unit 33 and the coil terminal 34.

[0028] A relay according to an embodiment of the present 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 the movable part 3 is swingable relative to the base part 3. The housing 1 covers the movable part 2 and the base part 3.

[0029] In embodiments of the invention, the terms "comprise" and "have" and any variations thereof are understood to be intended to cover a non-exclusive inclusion. For example, a process, method, system, product, or apparatus comprising a series of steps or units is not limited to the listed steps or units, but can optionally include steps or units not listed, or can optionally include other steps or components inherent to those processes, methods, products, or apparatus.

[0030] The base portion 3 includes a coil 31, an iron core 32, a fixed spring unit 33, a coil terminal 34, and a second plastic body 35. The second plastic body 35 integrally assembles the coil 31, the iron core 32, the fixed spring unit 33, and the coil terminal 34 by injection molding.

[0031] The coil 31 may include a coil bobbin and an enameled wire wound around the coil bobbin. The fixed spring unit 33 includes two normally open fixed spring pieces 331, two normally closed fixed spring pieces 332, and two common end spring pieces 333.

[0032] A normally open fixed spring pull-out pin 3311 is provided at a first end of the normally open fixed spring piece 331, exposing the side of the second plastic body 35, a normally closed fixed spring pull-out pin 3321 is provided at a first end of the normally closed fixed spring piece 332, and a common end pull-out pin 3331 is provided at a first end of the common end spring piece 333, exposing the side of the second plastic body 35.

[0033] A normally open fixed contact 3312 exposing the upper surface of the second plastic body 35 is provided at the second end of the normally closed fixed spring piece 331, a normally closed fixed contact 3322 exposing the upper surface of the second plastic body 35 is provided at the second end of the normally closed fixed spring piece 332, and a welding stage 3332 exposing the upper surface of the second plastic body 35 is provided at the second end of the common end spring piece 333.

[0034] In the base portion 3, the pull-out pin 341 of the coil terminal 34 is located at one end of the second plastic body 35. The normally-closed fixed spring pull-out pin 3321, the common end pull-out pin 3331, and the normally-open fixed spring pull-out pin 3311 are arranged in this order from one end to the other end of the second plastic body 35. The normally-open fixed spring pull-out pin 3311 is located at the other end of the second plastic body 35.

[0035] 2, a positioning groove 351 is provided on the side of the second plastic body 35, which is located at a position corresponding to the position of the welding stage 3332. The positioning groove 351 is used to accommodate an insert in the injection molding process so that the insert can position the welding stage 3332 and ensure the consistency of relay parameters.

[0036] Specifically, in the process in which the coil 31, the iron core 32, the fixed spring unit 33, the coil terminal 34 and the second plastic body 35 are integrally assembled by injection molding, the insert is placed in the positioning groove 351 of the injection mold and the second plastic body 35, thereby realizing the function of the positioning welding stage 3332.

[0037] For example, the positioning groove 351 can be trapezoidal in shape, with a "small upper portion and a large lower portion." On the one hand, the trapezoidal shape of the positioning groove 351 is convenient for demolding, while the large size of the lower portion of the positioning groove 351 helps to increase the strength of the insert.

[0038] As shown in FIGS. 9 to 11, FIGS. 9 to 11 show schematic views of a movable part 2 from three different perspectives according to a first embodiment of the present invention. The movable part 2 includes two movable spring pieces 22, an armature 21, a permanent magnet 24, and a first plastic body 23. The first plastic body 23 is formed by integrally assembling the two movable spring pieces 22, the armature 21, and the permanent magnet 24 by injection molding. The permanent magnet 24 may be provided on one side of the armature 21 facing the base part 3. The two movable spring pieces 22 are provided on two opposite sides of the armature 21 in the width direction D2. The two movable spring pieces 22 may be arranged symmetrically around the armature 21.

[0039] 6 and 11, the movable part 2 further includes a first positioning part 25, and the base part 3 further includes a second positioning part 36. The first positioning part 25 and the second positioning part 36 are positioned and cooperate with each other, and the first positioning part 25 and the second positioning part 36 form a swing fulcrum around which the movable part 2 can swing relative to the base part 3.

[0040] 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 intermediate positions in the longitudinal 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 intermediate positions in the longitudinal direction D1 of the base part 3.

[0041] As an example, the first positioning portion 25 may be a positioning groove provided on one side of the movable portion 2 facing the base portion 3. The second positioning portion 36 may be a positioning protrusion provided on the surface of the base portion 3 facing the movable portion 2, and can be extended into the positioning groove to achieve positioning.

[0042] Of course, in other embodiments, the first positioning portion 25 may be a positioning protrusion, and the second positioning portion 36 may be a positioning groove.

[0043] 12 to 14B, the movable spring piece 22 includes a movable spring body 221 and a welded piece structure 222, and the welded piece structure 222 is connected to the movable spring body 221. The welded piece structure 222 is welded to a welding stage 3332 of the base part 3 so that the movable part 2 forms a seesaw structure.

[0044] For example, the movable spring body 221 has a longitudinal structure to which the welded piece structure 222 is connected at the middle position in the longitudinal direction D1 of the movable spring body 221.

[0045] A normally open movable contact 2211 and a normally closed movable contact 2212 are provided at both ends of the movable spring body 221 in the longitudinal direction D1, respectively, and the normally open movable contact 2211 corresponds to the normally open fixed contact 3312 of the base part 3, and the normally closed movable contact 2212 corresponds to the normally closed fixed contact 3322 of the base part 3.

[0046] 12A to 14B, the welded piece structure 222 includes a connecting portion 223 and a welded portion 224, and the welded portion 224 is connected to the movable spring body 221 via the connecting portion 223. The welded portion 224 includes a first welded structure 228 and a second welded structure 229 that are welded to the base portion 3, and the first welded structure 228 and the second welded structure 229 are located on the same side of the connecting portion 223 along the longitudinal direction D1 of the armature 21.

[0047] In this embodiment, the movable spring piece 22 is connected to the base portion 3 via a first welded structure 228 and a second welded structure 229. Using at least two welded structures can better ensure the connection strength between the movable spring piece 22 and the base portion 3, make the welded piece structure 222 less likely to be detached from the base portion 3, and increase the mechanical life of the relay. At the same time, the movable spring piece 22 is connected to the base portion 3 via the first welded structure 228 and the second welded structure 229, which can better ensure electrical conductivity and heat dissipation and reduce the temperature rise at the weld spot.

[0048] It can be understood that the first welded structure 228 and the second welded structure 229 are welded to the weld stage 3332 of the common end spring piece 333 using, for example, but not limited to, laser welding.

[0049] For example, the connection line between the first welding structure 228 and the second welding structure 229 is approximately parallel to the longitudinal direction D1 of the armature 21. That is, when the first welding structure 228 and the second welding structure 229 are welded to the welding stage 3332 of the base portion 3, the two formed welding spots are linearly arranged along the longitudinal direction D1 of the armature 21.

[0050] It can be appreciated that the first welded structure 228 and / or the second welded structure 229 may be a groove structure.

[0051] For example, the first welded structure 228 and the second welded structure 229 are both groove structures, and are both located on one side of the welded portion 224 facing away from the movable spring body 221.

[0052] The groove walls of the groove structure may be arc-shaped to increase the length of the contour line connecting the weld piece structure 222 and the welding stage 3332 after laser irradiation, enhance the bonding strength of the welding spot, and improve the mechanical life of the relay.

[0053] It can be understood that the specific structures of the first welded structure 228 and the second welded structure 229 may be the same or different. For example, one of the first welded structure 228 and the second welded structure 229 may be a groove structure, and the other may be another structure that achieves welding. If the first welded structure 228 and the second welded structure 229 are both groove structures, the sizes of the two groove structures may be the same or different.

[0054] 12A, 12B, and 15, which shows an enlarged partial view of the X1 portion of FIG.

[0055] For example, the connection portion 223 is flush with the movable spring body 221. A fold line 227 whose extension direction is perpendicular to the longitudinal direction D1 of the armature 21 is provided at the connection spot between the connection portion 223 and the weld portion 224. The weld portion 224 is provided by being bent relative to the connection portion 223 via the fold line 227. As a result, when the movable part 2 swings relative to the base part 3, the deformation position of the weld piece structure 222 surrounds the vicinity of the fold line 227, and the transmission of deformation stress to the weld spot is reduced.

[0056] 15 , a part of welded portion 224 where first welded structure 228 and second welded structure 229 are provided is bent relative to movable spring main body 221 in a direction away from base portion 3. That is, welded portion 224 is bent upward relative to movable spring main body 221 and connecting portion 223 via fold line 227.

[0057] 3 and 15, an angle β is formed between the welded portion 224 and the movable spring body 221. When the first welded structure 228 and the second welded structure 229 of the welded portion 224 are horizontally welded to the welding stage 3332, the left side of the movable spring body 221 is lower and the right side is higher. Therefore, when the part of the welded portion 224 where the first welded structure 228 and the second welded structure 229 are provided is bent relative to the movable spring body 221 in a direction away from the base portion 3, the armature 21 on the side closest to the coil terminal 34 comes into contact with the pole surface of the iron core 32, forming a normally closed end, and the armature 21 on the side away from the coil terminal 34 separates from the pole surface of the iron core 32, forming a normally open end.

[0058] It can be seen that the size of the angle β between the welded portion 224 and the movable spring body 221 can be adjusted according to the size of the attractive force of the relay coil, thereby further improving the manufacturing yield of the product and increasing the parameter stability and margin of the product.

[0059] The fold line 227 is located on the other side of the connection portion 223 relative to the first welded structure 228 and the second welded structure 229 along the longitudinal direction D1 of the armature 21. That is, along the longitudinal direction D1 of the armature 21, the first welded structure 228 and the second welded structure 229 are located on one side of the connection portion 223, and the fold line 227 is located on the other side of the connection portion 233.

[0060] 14A and 14B, the connection line S between the normally open movable contact 2211 and the normally closed movable contact 2212 of the movable 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 movable contact of the movable spring piece 22 comes into contact with the fixed contact of the fixed spring unit 33, the reaction force of the deformed movable spring piece 22 becomes approximately on the same line as the broken line 227, reducing the lateral torque of the movable spring piece 22 and improving the stability of the swing movement of the movable part 2, thereby extending the machine life and improving the consistency and stability of product parameters.

[0061] It should be noted that both ends of the connecting line S start from the center point of the normally open movable contact 2211 and the center point of the normally closed movable contact 2212, respectively. For example, if the normally open movable contact 2211 and the normally closed movable contact 2212 each comprise a single contact, both ends of the connecting line S start from the center point of each contact. If either the normally open movable contact 2211 or the normally closed movable contact 2212 includes two contacts arranged in parallel, one end of the connecting line S starts from the center point of the two contacts of the normally open movable contact 2211, and the other end of the connecting line S starts from the center of the two contacts of the normally closed movable contact 2212.

[0062] As shown in FIG. 9, the plane on which the normally open movable contact 2211 and the normally closed movable contact 2212 of the movable spring body 221 are located is higher than the pole surface of the armature 21, but this height difference is usually controlled so as not to exceed the overstroke value of the contacts.

[0063] Of course, in other embodiments, the plane on which the normally open movable contact 2211 and the normally closed movable contact 2212 of the movable spring body 221 are located is flush with the pole surface of the armature 21, and the stress generated when the armature 21 contacts the iron core 32 of the base part 3 and the stress generated when the movable contact and the static contact contact reach a stable state almost simultaneously, reducing the lateral torque of the movable movable spring piece 22 and further improving the stability of the swing operation of the movable part 2.

[0064] 14B , a recess 2213 is further provided on one side of the movable spring body 221 facing the welded piece structure 222, the recess 2213 being provided at the edge of the connection spot between the connection portion 223 and the movable spring body 221.

[0065] For example, recesses 2213 are provided on two opposing side edges of the connecting portion 223 along the longitudinal direction D1 of the armature 21. This allows the length of the connecting portion 223 to be increased without increasing the width of the entire relay.

[0066] Furthermore, each corner of the recess 2213 may be chamfered, and the chamfered transition can reduce stress concentration. For example, the chamfer may be, but is not limited to, a circular arc shape.

[0067] 16 , along the longitudinal direction D1 of the armature 21, the first welded structure 228 is closer to the connection portion 223 than the second welded structure 229. The welded portion 224 includes a main body portion 225 and an expanded portion 226. The main body portion 225 is connected to the movable spring body 221 via the connection portion 223, and the first welded structure 228 and the second welded structure 229 are disposed on the main body portion 225. A fold line 227 is provided at the connection spot between the main body portion 225 and the connection portion 223. The expanded portion 226 is connected to the main body portion 225 and is located along the width direction D2 of the armature 21, corresponding to the position of the first welded structure 228 and / or the second welded structure 229.

[0068] The widened portion 226 improves the rigidity of the welding spot position and prevents stress from being transmitted to the first welding structure 228 when the movable part 2 swings.

[0069] Furthermore, an enlarged portion 226 is provided on one side of the main body portion 225 facing the movable spring main body 221, and the enlarged portion 226 corresponds to the position of the first welded structure 228 and / or the second welded structure 229.

[0070] As an example, the widened portion 226 includes a first widened section 2261 and a second widened section 2262, where 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.

[0071] The first widened section 2261 completely covers the location of the first welded structure 228 in the longitudinal direction D1 of the armature 21, and the second widened section 2262 completely covers the location of the second welded structure 229 in the longitudinal direction D1 of the armature 21.

[0072] Along the longitudinal direction D1 of the armature 21, the start point of the first widened section 2261 is close to the connection 223 with respect to the first welded structure 228. The start point of the second widened section 2262 is between the first welded structure 228 and the second welded structure 229.

[0073] By providing first and second widened sections 2261 and 2262 of different widths at the positions of weld 224 corresponding to first and second weld structures 228 and 229, a stable matching of the attractive force and the reactive force is ensured. Therefore, when the weld spot formed by first weld structure 228 breaks off during operation, the matching between the attractive force and the reactive force of the weld spot formed by second weld structure 229 remains essentially unchanged during operation, ensuring the stability of the operating voltage and the discharging voltage of the relay, preventing permanent failure of the relay after a weld spot failure, and improving the service life and reliability of the product.

[0074] Specifically, FIG. 24 shows a schematic diagram of the size of the reaction force caused by deformation of a weldment strip structure according to an embodiment of the present invention, as shown in FIGS. 14A, 14B, and 24. The reaction force F due to the weldment strip structure 222 is expressed as F=a(W*E*D*T 3 ) / L 3 is.

[0075] where a is a constant, D represents the displacement (mm) of the weld piece structure 222, which is related to the structure of the product and is constrained by the stroke of the armature 21 rotating around the fulcrum. E represents the material elastic modulus (Gpa) of the weld piece structure 222, and E is a constant. T represents the thickness (mm) of the weld piece structure 222, and the material elastic modulus E and the thickness T of the well structure are all related to the material. W represents the width (mm) of the weld piece structure 222 along the width direction D2 at the location of the weld spot (i.e., the width of the weld piece structure 222 at the location of the first weld structure 228 / second weld structure 229). L represents the length from the weld spot to the broken line 227 along the longitudinal direction D1.

[0076] Therefore, after the relay product structure is finally determined and the material of the welded piece structure 222 is selected, it can be seen that the size of F during use of the relay is mainly related to the value of the ratio W / L3. Therefore, to ensure that the size of F is stable before and after the separation of the first welded structure 228, it is necessary to ensure that the value of the ratio W / L3 is stable.

[0077] Therefore, in this embodiment, as shown in FIGS. 14A and 14B, it is assumed that the width of the welded piece structure 222 at the location of the first welded structure 228 is W1, and the thickness of the welded piece structure 222 at the location of the second welded structure 229 is W2. The length from the first welded structure 228 to the folding line 227 is L1, and the length from the second welded structure 229 to the folding line 228 is L2. By optimizing the size, (W1 / L1 3 )≒(W2 / L2 3 ), the stability of the reaction force F can be ensured when the first welding structure 228 is operating and when the first welding mechanism 228 is disengaged and the second welding structure 229 is operating, thereby ensuring that the matching between the attraction force and the reaction force of the relay remains essentially unchanged and ensuring the stability of the operating voltage and the release voltage of the relay.

[0078] In addition, the maximum stress when the welded piece structure 222 is deformed is σ=b*L / W*T 2and b is a constant.

[0079] Continuing to refer to FIG. 16, the first welding structure 228 and the second welding structure 229 are located on one side of the welding portion 224 facing away from the movable spring body 221, and the widened portion 226 is located on one side of the welding portion 224 facing the movable spring body 211.

[0080] The connecting portion 223 includes a first connecting section 2231 and a second connecting section 2232 that are perpendicular to each other. One end of the first connecting section 2231 is connected to the movable spring body 221, one end of the second connecting section 2232 is connected to the other end of the first connecting section 2231, and the other end of the second connecting section 2232 is connected to the body portion 225.

[0081] The connection spot between the first connection section 2231 and the movable spring body 221 and the connection spot between the first connection section 2231 and the second connection section 2232 are provided with arc or round transitions to reduce stress concentration.

[0082] The first connection section 2231 extends perpendicular to the longitudinal direction D1 of the armature 21, the second connection section 2232 extends parallel to the longitudinal direction D1 of the armature 21, and the second connection section 2232 extends from the first connection section 2231 to one of the movable contacts of the movable spring body 221.

[0083] The main body 225 is J-shaped and includes a bent section 2251 and an extended section 2252. One end of the bent section 2251 is connected to the other end of the second connecting section 2232, and the extended section 2252 is connected to the other end of the bent section 2251. The first welded structure 228 and the second welded structure 229 are located in the extended section 2252. The bent section 2251 turns 180 degrees so that the extended section 2252 extends from the bent section 2251 to another movable contact point of the movable spring body 221. A fold line 227 is provided at the connection spot between the bent section 2251 and the second connecting section 2232.

[0084] 14, 14B, and 16, the width t1 of the portion of the bent section 2251 connected to the connection portion 223 is less than or equal to the thickness t2 of the portion of the extension section 2252 where the first welded structure 228 and the second welded structure 229 are provided, i.e., t1≦t2d. Meanwhile, the width t3 of the first connection 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 welded structure 228 and the second welded structure 229 are provided, i.e., t3>t1 and t3>t2. This design effectively improves the rigidity of the armature parts, and when the armature swings, deformation of the movable spring piece 22 is formed in the bent section 2251, which is advantageous to improving the stability of product parameters.

[0085] The first welded structure 228 and the second welded structure 229 are located on one side of the extension section 2252 facing away from the movable spring body 221, and the first widened section 2261 and the second widened section 2262 are located on one side of the extension section 2252 facing the movable spring body 211.

[0086] For example, the width of the welded piece structure 222 at the location of the folding line 227 is smaller than or equal to the width of the locations where the first welded structure 228 and the second welded structure 229 are located.

[0087] 17 to 19, a schematic side view of a relay according to a second embodiment of the present invention with the housing 1 removed, and FIG. 18 shows a schematic side view of the movable spring piece 22 of FIG. 17. FIG. 19 shows a partial enlarged view of X3 in FIG. 18. The same points as those of the first and second embodiments will not be repeated, but there are the following differences.

[0088] A part of welded portion 224 where first welded structure 228 and second welded structure 229 are provided is bent relative to movable spring body 221 in a direction approaching base portion 3. That is, welded portion 224 is bent downward relative to movable spring body 221 and connecting portion 223 via folding line 227.

[0089] 17 and 18 , an angle β is formed between the welded portion 224 and the movable spring body 221. When the first welded structure 228 and the second welded structure 229 of the welded portion 224 are horizontally welded to the welding stage 3332, the left side of the movable spring body 221 is higher and the right side is lower. Therefore, when the portion of the welded portion 224 where the first welded structure 228 and the second welded structure 229 are provided is bent relative to the movable spring body 221 in a direction approaching the base portion 3, the side of the armature 21 approaching the coil terminal 34 comes into contact with the pole face of the iron core 32 and forms a normally open end, and the side of the armature 21 away from the coil terminal 34 is separated from the pole face of the iron core 32 and forms a normally closed end.

[0090] Therefore, it can be seen that the welded portion 224 can be folded up or down as needed by providing the folding line 227, which helps to adaptively adjust the normally open and normally closed ends of the relay according to the requirements of use.

[0091] As shown in FIGS. 20 to 22B, FIGS. 20 and 21 show the movable part 2 of a relay according to a third embodiment of the present invention from two different viewpoints. FIG. 22A is a schematic perspective view of one movable spring piece of the relay according to the third embodiment of the present invention. FIG. 22B is a schematic perspective view of another movable spring piece of the relay according to the third embodiment of the present invention. The third embodiment does not overlap with the first and second embodiments in the same respects, but there are the following differences.

[0092] The welded piece structure 222 does not have a folding line 227, and the welded portion 224, the connecting portion 223, and the movable spring body 221 are provided flush with each other.

[0093] 23A and 23B show schematic diagrams of one movable leaf of a relay according to a fourth embodiment of the present invention. FIG. 23B shows a schematic diagram of another movable leaf of a relay according to the fourth embodiment of the present invention. The fourth embodiment does not overlap with the above-described embodiments in the same respects, but has the following differences.

[0094] If the product is not sensitive to parameter changes or has a large parameter margin, the widened portion 226 is set corresponding to only the first welded structure 228, and the widened portion 226 is not set corresponding to the second welded structure 229.

[0095] It is understood that the various examples / embodiments provided in the present invention can be combined with each other without causing a contradiction, and they will not be described one by one here.

[0096] In the embodiments of the invention, the terms "first," "second," and "third" are used for descriptive purposes only and should not be understood as indicating or implying relative importance. The term "plurality" means two or more unless otherwise limited. Terms such as "attached," "contact," "connected," and "fixed" should be understood broadly. For example, "connected" may be a fixed connection, a detachable connection, or an integral connection. "Contacted" may mean a direct connection or an indirect connection via an intermediate medium. The specific meanings of the above terms in the embodiments of the present invention can be understood by those skilled in the art depending on the specific circumstances.

[0097] In describing the embodiments of the present invention, the orientations or positional relationships indicated by terms such as "upper," "lower," "left," "right," "front," and "rear" are orientations or positional relationships based on the drawings and are intended merely to facilitate the description and simplification of the embodiments of the present invention, and do not indicate or imply that the devices or units referred to have a particular direction or are required to be configured and operate in a particular orientation, and therefore should not be understood as limitations on the embodiments of the invention.

[0098] In the description herein, the terms "one embodiment," "some embodiments," "particular embodiment," etc., mean that the particular feature, structure, material, or characteristic described in connection with this embodiment or example is included in at least one embodiment or example of the invention. In this description, general references to the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular feature, structure, material, or characteristic described may be connected in any suitable manner in any one or more embodiments or examples.

[0099] The above is only a preferred embodiment of the invention, and is not intended to limit the invention, and those skilled in the art can make various modifications and changes to the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the invention should be included in the protection scope of the invention. [Explanation of symbols]

[0100] 1. Housing 2 Moving parts 21 Armature 22 Movable spring piece 221 Movable spring body 2211 Normally open movable contact 2212 Normally closed movable contact 2213 Recess 222 Welded Piece Structure 223 Connection 2231 First Connection Section 2232 Second Connection Section 224 Welded Parts 225 Main body 2251 Folding Section 2252 Extension Section 226 Widening section 2261 First Widening Section 2262 Second Widening Section 227 Line 228 First Welded Structure 229 Second Welded Structure 23 First Plastic Body 24 Permanent Magnets 25 First positioning part 3 Base 31 Coil 32 Iron Core 33 Fixed spring unit 331 Normally open fixed spring piece 3311 Normally Open Fixed Spring Pull-Out Pin 3312 Normally open fixed contact 332 Normally closed fixed spring piece 3321 Normally closed fixed spring withdrawal pin 3322 Normally closed fixed contact 333 Common end spring piece 3331 Common End Pull-Out Pin 3332 Welding Stage 34 Coil terminal 341 Drawer Pin 35 Second Plastic Body 351 Positioning groove 36 Second positioning part D1 Longitudinal direction D2 Width direction.

Claims

1. a base portion and a movable portion swingable relative to the base portion, the movable portion including a movable spring piece, an armature, and a first plastic body, the movable spring piece and the armature being integrally assembled via the first plastic body, the movable spring piece including a movable spring body and a welded piece structure; the welded piece structure includes a connection portion and a weld portion, the weld portion is connected to the movable spring body via the connection portion, the weld portion includes a first welded structure welded to the base portion and a second welded structure, the first welded structure and the second welded structure are arranged on the same side of the connection portion along the length direction of the armature; relay.

2. The relay of claim 1 , wherein the weld is not flush with the moveable spring body.

3. the connecting portion is disposed flush with the movable spring body, a folding line is provided at a connection portion between the connection portion and the welded portion, and the welded portion is folded relative to the connection portion via the folding line; The relay according to claim 2 .

4. a portion of the welded portion where the first welded structure and the second welded structure are provided is bent relative to the movable spring body in a direction away from the base portion, or a portion of the welded portion where the first welded structure and the second welded structure are provided is bent relative to the movable spring body in a direction approaching the base portion; The relay according to claim 3 .

5. The relay according to claim 3 , wherein the extending direction of the broken line is perpendicular to the length direction of the armature.

6. The relay of claim 3 , wherein the folding line is located on the other side of the connection portion relative to the first welded structure and the second welded structure along the length of the armature.

7. 4. The relay according to claim 3, wherein a normally open movable contact and a normally closed movable contact are provided at both ends of the movable spring body along the length direction of the armature, respectively, and a connecting line between the normally open movable contact and the normally closed movable contact passes through a midpoint of the broken line.

8. the welded portion includes a main body portion and a widened portion; the main body portion is connected to the movable spring body via the connection portion, and the first welding structure and the second welding structure are disposed on the main body portion; the widened portion is connected to the main body portion and corresponds to a position of the first welded structure and / or the second welded structure along a width direction of the armature; The relay of claim 1 .

9. the first welded structure is closer to the connection portion than the second welded structure along the length of the armature; the widened portion includes a first widened section and a second widened section, the first widened section corresponding to the location of the first welded structure, and the second widened section corresponding to the location of the second welded structure; a size of the first widened section is smaller than a size of the second widened section along a width direction of the armature; 9. The relay of claim 8.

10. the first welded structure is closer to the connection portion than the second welded structure along the length of the armature; the widened portion includes a first widened section and a second widened section, the first widened section corresponding to the location of the first welded structure, and the second widened section corresponding to the location of the second welded structure; the first widening section completely covers a position where the first welded structure is disposed in a length direction of the armature, and the second widening section completely covers a position where the second welded structure is disposed in a length direction of the armature; 9. The relay of claim 8.

11. The relay of claim 10 , wherein the beginning of the first widened section is closer to the connection along the length of the armature than the first welded structure.

12. 9. The relay of claim 8, wherein the first welded structure and the second welded structure are disposed on one side of the weld away from the movable spring body, and the widened portion is disposed on one side of the weld facing the movable spring body.

13. 2. The relay according to claim 1, wherein a normally open movable contact and a normally closed movable contact are provided at both ends of the movable spring body along the length direction of the armature, respectively, and a plane on which the normally open movable contact and the normally closed movable contact are located is flush with a pole face of the armature, or the plane on which the normally open movable contact and the normally closed movable contact are located is higher than the pole face of the armature.

14. 2. The relay according to claim 1, wherein a recess is further provided on one side of the movable spring body facing the welded piece structure, the recess being disposed on an edge of a connection portion between the connection portion and the movable spring body.

15. The relay of claim 1 , wherein the weld is disposed flush with the movable spring body.

16. the weld includes a bent section and an extended section; One end of the bent section is connected to the connection portion, one end of the extension section is connected to the other end of the bent section, and the first welded structure and the second welded structure are disposed on the extension section; a width of a portion where the bent section and the connection portion are connected is smaller than or equal to a width of a portion where the first welded structure and the second welded structure of the extension section are provided; The relay of claim 1 .

17. the connection portion includes a first connection section and a second connection section; One end of the first connection section is connected to the movable spring body, and the width of the first connection section is larger than the width of the bent section and larger than the width of a portion of the extension section where the first welding structure and the first connection structure are arranged; and One end of the second connection section is connected to the other end of the first connection section, and the other end of the second connection section is connected to the bent section, and the first connection section is perpendicular to the second connection section.

17. The relay of claim 16.

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