CN218769301U - Relay with high action reliability - Google Patents

Abstract

The embodiment of the utility model discloses a relay with high action reliability, including base part and the movable part that can swing relative to the base part, movable part includes movable reed, armature and first plastic body, and movable reed and armature assemble into an organic whole through first plastic body; the movable spring piece comprises a movable spring body and a welding piece structure, the welding piece structure comprises a connecting part and a welding part, and the welding part is connected to the movable spring body through the connecting part; the welding part comprises a first welding structure and a second welding structure which are welded with the base part, and the first welding structure and the second welding structure are located on the same side of the connecting part in the length direction of the armature. At least two welded structure can guarantee the joint strength between movable contact spring and the base part better, and the soldering lug structure is difficult for breaking away, has promoted the mechanical life of relay. Meanwhile, the movable spring is connected with the base part through the first welding structure and the second welding structure, so that the electric conductivity and the heat dissipation performance can be better guaranteed, and the temperature rise of a welding spot position is reduced.

Description

Relay with high action reliability

Technical Field

The embodiment of the utility model provides a relate to electric control device technical field, particularly, relate to a relay with high action reliability.

Background

The subminiature electromagnetic relay has the advantages of small volume, low coil power consumption, double-pole double-throw contact output capacity and good reliability, and is widely used in the fields of network communication, medical equipment, test equipment, security protection and the like. The subminiature electromagnetic relay of the prior art is generally composed of a moving spring armature portion, a base portion and a housing. The movable spring armature part is formed by combining and injection molding an armature, a permanent magnet and a movable spring part containing a movable contact into a whole, and the movable spring part is generally symmetrically distributed by taking the armature as a center. The base part is usually formed by combined injection molding of a coil part and a static spring part with a static contact. The movable spring armature part is supported and positioned with the base in the vertical direction at the approximate center position, the movable spring and the static spring on the base part are welded and fixed to form a whole, and then the electromagnetic relay is formed after the shell is installed. When the relay coil is powered on and powered off, the movable spring armature part and the supporting part of the base form a rotating fulcrum, so that the armature drives the movable spring to swing back and forth in the swinging process, and the circuit of the reed part is switched on and off. Because the movable spring is fixed with the base part through welding, the movable spring part between the rotating fulcrum of the movable spring armature part and the welding point is deformed to generate a counter force, and the counter force is matched with the magnetic field suction force generated after the coil is electrified, so that the action voltage and the release voltage of the relay meet the requirements and the parameters are stable. In the application fields, relays usually need to be switched frequently, and products need to work reliably for more than one hundred million service lives in certain working scenes, so that a moving spring armature part serving as an action part needs to have good fatigue resistance and reliable parameter stability so as to meet the requirements of ultrahigh service life and consistency.

However, the welding points of the movable spring and the base part in the prior art are prone to stress fatigue and risk of disengagement failure, resulting in permanent failure of the relay.

SUMMERY OF THE UTILITY MODEL

An embodiment of the utility model provides a can promote product life's relay that has high action reliability.

The utility model discloses relay with high action reliability, including base part and the movable part that can swing relative to the base part, the movable part includes movable reed, armature and first plastic body, movable reed and the armature assemble into an organic whole through the first plastic body; the movable spring piece comprises a movable spring body and a welding piece structure, the welding piece structure comprises a connecting part and a welding part, and the welding part is connected to the movable spring body through the connecting part; the welding part comprises a first welding structure and a second welding structure which are welded with the base part, and the first welding structure and the second welding structure are located on the same side of the connecting part in the length direction of the armature.

According to some embodiments of the invention, the weld is not coplanar with the movable spring body.

According to some embodiments of the invention, the connecting portion is disposed coplanar with the movable spring body;

the connecting portion with the junction of weld part is equipped with the broken line, the weld part passes through the broken line for the connecting portion setting of buckling.

According to some embodiments of the invention, the portion of the welding portion provided with the first welding structure and the second welding structure is bent with respect to the movable spring body in a direction away from the base portion; or the like, or a combination thereof,

the portion of the welding portion where the first welding structure and the second welding structure are provided is bent toward a direction close to the base portion with respect to the movable spring body.

According to some embodiments of the invention, the direction of extension of the fold line is perpendicular to the length direction of the armature.

According to some embodiments of the invention, along a length direction of the armature, the fold line is located at the other side of the connecting portion with respect to the first welded structure and the second welded structure.

According to some embodiments of the utility model, the movable spring body is followed the length direction's of armature both ends are equipped with normally open movable contact and normally closed movable contact respectively, normally open movable contact with line between the normally closed movable contact passes through the mid point of broken line.

According to some embodiments of the invention, the weld comprises:

the body part is connected to the movable spring body through the connecting part, and the first welding structure and the second welding structure are arranged on the body part; and

a widened portion connected to the body portion and corresponding to a position of the first and/or second weld structure in a width direction of the armature.

According to some embodiments of the invention, the first weld structure is closer to the connection portion than the second weld structure along a length direction of the armature;

the widened portion includes a first widened portion corresponding to a position of the first welded structure and a second widened portion corresponding to a position of the second welded structure;

the dimension of the first widened section is smaller than the dimension of the second widened section along the width direction of the armature.

According to some embodiments of the invention, the first weld structure is closer to the connection portion than the second weld structure along a length direction of the armature;

the widened portion includes a first widened portion corresponding to a position of the first welded structure and a second widened portion corresponding to a position of the second welded structure;

the first widening section completely covers the position of the first welding structure in the length direction of the armature, and the second widening section completely covers the position of the second welding structure in the length direction of the armature.

According to some embodiments of the invention, along a length direction of the armature, a starting point of the first widened section is closer to the connection portion than to the first welded structure.

According to some embodiments of the present invention, the first welding structure and the second welding structure are located the weld part is dorsad one side of the movable spring body, the widened portion is located the weld part orientation one side of the movable spring body.

According to some embodiments of the present invention, a normally open moving contact and a normally closed moving contact are respectively disposed at two ends of the moving spring body along the length direction of the armature, and a plane where the normally open moving contact and the normally closed moving contact are located is coplanar with a pole surface of the armature; or the plane of the normally open movable contact and the normally closed movable contact is higher than the pole surface of the armature.

According to some embodiments of the utility model, the movable spring body orientation one side of soldering lug structure still is equipped with the concave part, the concave part set up in connecting portion with the edge of the junction of movable spring body.

According to some embodiments of the invention, the weld part with the dynamic spring body coplane sets up.

According to some embodiments of the invention, the weld comprises:

one end of the bending section is connected to the connecting part; and

one end of the extension section is connected to the other end of the bending section; the first welding structure and the second welding structure are arranged on the extension section;

the width of the part, connected with the connecting part, of the bending section is smaller than or equal to the width of the part, provided with the first welding structure and the second welding structure, of the extending section.

According to some embodiments of the invention, the connecting portion comprises:

one end of the first connecting section is connected to the movable spring body; the width of the first connecting section is greater than that of the bending section; and

one end of the second connecting section is connected to the other end of the first connecting section, and the other end of the second connecting section is connected to the bending section; the first connecting section is perpendicular to the second connecting section.

One embodiment of the above utility model has at least the following advantages or beneficial effects:

the utility model discloses the relay is connected through first welded structure and second welded structure between movable contact spring and the base part, and two at least welded structure can guarantee the joint strength between movable contact spring and the base part better for the soldering lug structure is difficult to throw off from the base part, has promoted the mechanical life of relay. Simultaneously, movable contact spring and base part are connected through first welded structure and second welded structure, can guarantee electric conductivity and thermal diffusivity better, and then reduce the temperature rise of solder joint position.

Drawings

Fig. 1 is a schematic perspective view of a relay according to a first embodiment of the present invention.

Fig. 2 shows a perspective view of fig. 1 with the housing removed.

Fig. 3 is a side view of fig. 1 with the housing removed.

Fig. 4 shows the schematic view of fig. 2 with the second plastic body removed.

Fig. 5 shows the schematic view of fig. 3 with the second plastic body removed.

Fig. 6 shows a schematic view of the base part.

Fig. 7 shows a schematic view of a coil and a core.

Fig. 8 is a schematic diagram showing the stationary spring unit and the coil terminal.

Fig. 9 to 11 show schematic views of the movable part of the first embodiment of the invention at three different viewing angles.

Fig. 12A is a schematic perspective view of one of the movable springs according to the first embodiment of the present invention.

Fig. 12B is a perspective view of another movable spring plate according to the first embodiment of the present invention.

Fig. 13 shows a side view of fig. 12B.

Fig. 14A shows a schematic top view of fig. 12A.

Fig. 14B shows a schematic top view of fig. 12B.

Fig. 15 shows a partially enlarged view at X1 in fig. 13.

Fig. 16 shows a partially enlarged view at X2 in fig. 14B.

Fig. 17 is a schematic side view of a relay with a housing removed according to a second embodiment of the present invention.

Figure 18 is a side view of the movable spring plate of figure 17.

Fig. 19 shows a partially enlarged view at X3 in fig. 18.

Fig. 20 and 21 show a third embodiment of the relay according to the invention in two different views.

Fig. 22A is a schematic perspective view of one of the movable springs of the relay according to the third embodiment of the present invention.

Fig. 22B is a perspective view of another movable contact spring of a relay according to a third embodiment of the present invention.

Fig. 23A is a schematic view of one of the movable springs of the relay according to the fourth embodiment of the present invention.

Fig. 23B is a schematic view of another movable spring of a relay according to a fourth embodiment of the present invention.

Fig. 24 is a schematic view showing the magnitude of the reaction force generated by the deformation of the lug structure according to the embodiment of the present invention.

Wherein the reference numerals are as follows:

1. outer casing

2. Movable part

21. Armature iron

22. Movable contact spring

221. Dynamic spring body

2211. Normally open moving contact

2212. Normally closed moving contact

2213. Concave part

222. Soldering lug structure

223. Connecting part

2231. First connecting section

2232. Second connecting section

224. Weld part

225. Body part

2251. Bending section

2252. Extension section

226. Widening part

2261. First widening section

2262. Second widening section

227. Fold line

228. First welding structure

229. Second welding structure

23. First plastic body

24. Permanent magnet

25. A first positioning part

3. Base part

31. Coil

32. Iron core

33. Static spring unit

331. Normally open static reed

3311. Normally open static spring leading-out pin

3312. Normally open stationary contact

332. Normally closed static reed

3321. Normally closed static spring lead-out pin

3322. Normally closed stationary contact

333. Common end spring leaf

3331. Common terminal pin

3332. Welding table

34. Coil terminal

341. Lead-out pin

35. Second plastic body

351. Locating slot

36. Second positioning part

D1, length direction

D2, width direction

Detailed Description

Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and thus their detailed description will be omitted.

As shown in fig. 1 to 8, fig. 1 is a schematic perspective view of a relay according to a first embodiment of the present invention. Fig. 2 shows a perspective view of fig. 1 with the housing 1 removed. Fig. 3 shows a schematic side view of the housing 1 of fig. 1 with the housing 1 removed. Fig. 4 shows the second plastic body 35 of fig. 2 removed. Fig. 5 shows the second plastic body 35 of fig. 3 removed. Fig. 6 shows a schematic view of the base part 3. Fig. 7 shows a schematic view of the coil and the core 32. Fig. 8 shows a schematic view of the stationary spring unit 33 and the coil terminal 34.

The utility model discloses relay of embodiment includes shell 1, movable part 2 and base part 3. The movable part 2 is disposed above the base part 3, and the movable part 2 is swingable with respect to the base part 3. The housing 1 covers the movable portion 2 and the base portion 3.

It is to be understood that the terms "comprises" and "comprising," and any variations thereof, in the embodiments of the present invention, are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements listed, but may alternatively include other steps or elements not listed, or may alternatively include other steps or elements inherent to such process, method, article, or apparatus.

The base portion 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 formed by assembling the coil 31, the core 32, the stationary spring unit 33, and the coil terminal 34 into an integral member by injection molding.

The coil 31 may include a bobbin and an enamel wire wound around an outer circumference of the bobbin. The stationary spring unit 33 includes two normally open stationary springs 331, two normally closed stationary springs 332, and two common end springs 333.

The first end of the normally open static reed 331 is provided with a normally open static reed leading-out pin 3311 which is exposed out of the side surface of the second plastic body 35, the first end of the normally closed static reed 332 is provided with a normally closed static reed leading-out pin 3321 which is exposed out of the side surface of the second plastic body 35, and the first end of the common end reed 333 is provided with a common end leading-out pin 3331 which is exposed out of the side surface of the second plastic body 35.

The second end of normally open static reed 331 is equipped with normally open static contact 3312 that exposes the top surface of second plastic body 35, and the second end of normally closed static reed 332 is equipped with normally closed static contact 3322 that exposes the top surface of second plastic body 35, and the second end of common end reed 333 is equipped with welding platform 3332 that exposes the top surface of second plastic body 35.

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

As shown in fig. 2, a positioning groove 351 is formed in a side surface of the second plastic body 35, and a position of the positioning groove 351 corresponds to a position of the welding table 3332, so as to accommodate the insert in an injection molding process, so that the insert positions the welding table 3332, and consistency of relay parameters is ensured.

Specifically, in the process of assembling the coil 31, the iron core 32, the stationary spring unit 33, the coil terminal 34 and the second plastic body 35 into an integral piece by injection molding, the insert is disposed in the injection mold and disposed in the positioning groove 351 of the second plastic body 35 to perform the function of the positioning stage 3332.

As an example, the positioning groove 351 may be trapezoidal in shape and have a "small top and large bottom". On one hand, the positioning groove 351 is trapezoidal, so that demoulding is facilitated; on the other hand, the lower part of the positioning groove 351 is large in size, so that the strength of the insert is enhanced.

As shown in fig. 9 to 11, fig. 9 to 11 are schematic views of the movable part 2 of the first embodiment of the present invention at three different viewing angles. The movable part 2 comprises two movable springs 22, an armature 21, a permanent magnet 24 and a first plastic body 23, and the first plastic body 23 is formed by assembling the two movable springs 22, the armature 21 and the permanent magnet 24 into a whole through injection molding. The permanent magnet 24 may be arranged on the side of the armature 21 facing the base part 3. The two movable springs 22 are respectively disposed on two opposite side edges in the width direction D2 of the armature 21. The two movable springs 22 may be symmetrically disposed about the armature 21.

As shown in fig. 6 and 11, the movable portion 2 further includes a first positioning portion 25, the base portion 3 further includes a second positioning portion 36, and the first positioning portion 25 is in positioning fit with the second positioning portion 36. The first positioning portion 25 and the second positioning portion 36 are equivalent to forming a swing fulcrum at which the movable part 2 is swingable relative to the base part 3.

As an example, the movable portion 2 includes two first positioning portions 25, and the base portion 3 includes two second positioning portions 36. The two first positioning portions 25 are provided at intervals along the width direction D2 of the movable portion 2, and are located at intermediate positions in the longitudinal direction D1 of the movable portion 2. The two second positioning portions 36 are provided at intervals along the width direction D2 of the base portion 3, and are located at the middle position in the length direction D1 of the base portion 3.

As an example, the first positioning portion 25 may be a positioning groove provided on a side of the movable portion 2 facing the base portion 3. The second positioning portion 36 may be a positioning protrusion, the positioning protrusion is protruded from the surface of the base portion 3 facing the movable portion 2, and the positioning protrusion can extend into the positioning groove to realize positioning.

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.

As shown in fig. 12A to 14B, the movable spring plate 22 includes a movable spring body 221 and a solder piece structure 222, and the solder piece structure 222 is connected to the movable spring body 221. The tab structure 222 is welded to the pad 3332 of the base part 3 so that the movable part 2 forms a seesaw structure.

As an example, the movable spring body 221 has a long strip structure, and the soldering lug structure 222 is connected to a middle position of the movable spring body 221 in the longitudinal direction D1.

A normally open moving contact 2211 and a normally closed moving contact 2212 are respectively arranged at two ends of the moving spring body 221 in 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.

Referring to fig. 12A to 14B, the soldering lug structure 222 includes a connecting portion 223 and a soldering portion 224, and the soldering portion 224 is connected to the movable spring body 221 through the connecting portion 223. The welding portion 224 includes a first welding structure 228 and a second welding structure 229 that are welded to the base portion 3, and the first welding structure 228 and the second welding structure 229 are located on the same side of the connecting portion 223 in the length direction D1 of the armature 21.

In the present embodiment, the movable spring 22 is connected to the base portion 3 by the first welding structure 228 and the second welding structure 229, and at least two welding structures can better ensure the connection strength between the movable spring 22 and the base portion 3, so that the soldering lug structure 222 is not easily detached from the base portion 3, and the mechanical life of the relay is prolonged. Meanwhile, the movable spring plate 22 is connected with the base part 3 through the first welding structure 228 and the second welding structure 229, so that the electrical conductivity and the heat dissipation performance can be better ensured, and the temperature rise of the welding spot position can be further reduced.

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

As an example, a line drawn between the first weld structure 228 and the second weld structure 229 is substantially parallel to the length direction D1 of the armature 21. In other words, when the first and second welding structures 228 and 229 are welded to the welding table 3332 of the base portion 3, two welding points are formed to be linearly arranged along the length direction D1 of the armature 21.

It is understood that the first weld structure 228 and/or the second weld structure 229 may be a slot structure.

As an example, the first welding structure 228 and the second welding structure 229 are both groove structures, and the first welding structure 228 and the second welding structure 229 are both disposed on a side of the welding portion 224 facing away from the movable spring body 221.

The cell wall of groove structure can be the arc to increase the contour line length that soldering lug structure 222 and welding platform 3332 combined after laser irradiation, and then improve the cohesion of solder joint, promote the mechanical life of relay.

It is understood that the specific structure of the first welding structure 228 and the second welding structure 229 may be the same or different. For example, one of the first and second weld structures 228, 229 may be a slot structure and the other may be another structure that enables welding. When the first and second weld structures 228, 229 are both slot structures, the dimensions of the two slot structures may be the same or different.

As shown in fig. 12A, 12B, and 15, fig. 15 shows a partial enlarged view at X1 in fig. 13. The welding portion 224 is not coplanar with the movable spring body 221.

As an example, the connection portion 223 is disposed coplanar with the movable spring body 221. A folding line 227 is provided at the connection portion between the connection portion 223 and the welding portion 224, the extending direction of the folding line 227 is perpendicular to the longitudinal direction D1 of the armature 21, and the welding portion 224 is bent with respect to the connection portion 223 by the folding line 227. Thus, during the swinging of the movable part 2 relative to the base part 3, the deformation position in the tab structure 222 is around the fold line 227, thereby reducing the transmission of deformation stress to the welding point.

As shown in fig. 15, the portion of the welding portion 224 provided with the first welding structure 228 and the second welding structure 229 is bent with respect to the movable spring body 221 in a direction away from the base portion 3. That is, the welding portion 224 is bent upward with respect to the movable spring body 221 and the connection portion 223 by the folding line 227.

As shown in fig. 3 and 15, the welding portion 224 forms an included angle β with the movable spring body 221. When the first welding structure 228 and the second welding structure 229 of the welding portion 224 are horizontally welded on the welding table 3332, the movable spring body 221 exhibits a low left and a high right. Therefore, when the portion of the welding portion 224 provided with the first welding structure 228 and the second welding structure 229 is bent with respect to the movable spring body 221 in the direction away from the base portion 3, the armature 21 on the side close to the coil terminal 34 is in contact with the pole face of the iron core 32, which is a normally closed end; the armature 21 on the side away from the coil terminal 34 is separated from the pole face of the core 32 and is a normally open end.

It can be understood that the size of the included angle β between the welding portion 224 and the movable spring body 221 can be adjusted according to the size of the coil attraction force of the relay, so as to further improve the manufacturing yield of the product and improve the parameter stability and the margin of the product.

The folding line 227 is located on the other side of the connection portion 223 with respect to the first and second weld structures 228 and 229 along the length direction D1 of the armature 21. In other words, the first and second weld structures 228 and 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 223 along the length direction D1 of the armature 21.

With continued reference to fig. 14A and 14B, a connection line S between the normally open moving contact 2211 and the normally closed moving contact 2212 of the moving spring body 221 passes through a midpoint of the fold line 227. Through the design, when the movable part 2 swings relative to the base part 3 and the movable contact of the movable spring piece 22 is in contact with the fixed contact of the fixed spring unit 33, the reaction force generated by the deformation of the movable spring piece 22 is approximately collinear with the folding line 227, so that the lateral torsion of the movable spring piece 22 is reduced, the stability of the swinging action of the movable part 2 is improved, the mechanical life is prolonged, and the consistency and the stability of product parameters are improved.

It should be noted that, two ends of the connection line S respectively start from the central point of the normally open moving contact 2211 and the central point of the normally closed moving contact 2212. For example, if the normally open moving contact 2211 and the normally closed moving contact 2212 are both one contact, the two ends of the connection line S respectively start from the central 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, one end of the connection line S starts from the central point of the two contacts of the normally open moving contact 2211, and the other end of the connection line S starts from the central point of the two contacts of the normally closed moving contact 2212.

As shown in fig. 9, the normally open moving contact 2211 and the normally closed moving contact 2212 of the moving spring body 221 are located on a plane higher than the pole face of the armature 21, but the height difference is usually controlled not to exceed the overtravel value of the contacts.

Of course, in other embodiments, the planes of the normally open movable contact 2211 and the normally closed movable contact 2212 of the movable spring body 221 are coplanar with the pole surface of the armature 21, so that the stress generated when the armature 21 contacts the iron core 32 of the base portion 3 and the stress generated when the movable and static contacts contact each other are substantially simultaneously in a stable state, thereby reducing the lateral torsion of the movable spring piece 22 and further improving the stability of the swing motion of the movable portion 2.

As shown in fig. 16, fig. 16 is a partially enlarged view at X2 in fig. 14B. The side of the moving spring body 221 facing the tab structure 222 is further provided with a recess 2213, and the recess 2213 is disposed at the edge of the connection portion 223 and the moving spring body 221.

As an example, along the length direction D1 of the armature 21, both opposite sides of the connection portion 223 are provided with concave portions 2213. In this way, the length of the connection portion 223 can be increased without increasing the overall width of the relay.

Further, the corners of the concave portion 2213 are provided with chamfers, and stress concentration can be reduced through chamfer transition. As an example, the chamfer may be a circular arc shape, but is not limited thereto.

With continued reference to fig. 16, the first weld feature 228 is located closer to the connection portion 223 than the second weld feature 229 along the length direction D1 of the armature 21. The welding portion 224 includes a body portion 225 and a widened portion 226, the body portion 225 is connected to the movable spring body 221 through a connecting portion 223, and a first welding structure 228 and a second welding structure 229 are provided on the body portion 225. The connection part of the body part 225 and the connection part 223 is provided with a folding line 227. The widened portion 226 is connected to the body portion 225, and the widened portion 226 corresponds to the position of the first weld structure 228 and/or the second weld structure 229 in the width direction D2 of the armature 21.

By providing the widened portion 226, the rigidity of the welding point position is increased, and the transmission of stress to the first welding structure 228 when the movable part 2 swings is avoided.

Further, a widened portion 226 is provided at a side of the body portion 225 facing the movable spring body 221, and the widened portion 226 corresponds to a position of the first welding structure 228 and/or the second welding structure 229.

As an example, the widened portion 226 includes a first widened section 2261 corresponding to the location of the first weld structure 228 and a second widened section 2262 corresponding to the location of the second weld structure 229. The first widened section 2261 has a smaller size than the second widened section 2262 along the width direction D2 of the armature 21.

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

Along the length direction D1 of the armature 21, the start of the first widened section 2261 is closer to the connection portion 223 relative to the first weld structure 228. The beginning of the second widened section 2262 is located between the first welded structure 228 and the second welded structure 229.

The first widening section 2261 and the second widening section 2262 with different widths are arranged at the positions, corresponding to the first welding structure 228 and the second welding structure 229, in the welding part 224, so that the suction force and the counter force of a product are stably matched, after a welding point formed by the first welding structure 228 is separated in work, the suction force and the counter force of the welding point formed by the second welding structure 229 in work are basically kept unchanged, the stability of the action voltage and the release voltage of the relay is ensured, the permanent failure of the relay caused by the failure of one welding point is avoided, the service life of the product is prolonged, and meanwhile, the reliability of the product is improved.

Specifically, as shown in fig. 14A, 14B and 24, fig. 24 is a schematic diagram illustrating the magnitude of the reaction force generated by the deformation of the tab structure according to the embodiment of the present invention. The counterforce F = a (W × E × D × T) generated by the tab structure 222 ³ )/L ³ 。

Where a is a constant and D represents the displacement (mm) of the tab structure 222, the displacement D is related to the structure of the product and is limited by the travel of the armature 21 about the pivot. E represents the material elastic coefficient (Gpa) of the tab structure 222, and E is a constant. T represents the thickness (mm) of the tab structure 222, and both the material spring constant E and the tab structure thickness T are material dependent. W represents the width (mm) of the pad structure 222 at the position of the pad along the width direction D2 (i.e., the width of the pad structure 222 at the position of the first bonding structure 228/the second bonding structure 229). L represents the length from the welding point to the folding line 227 along the length direction D1.

It can be seen that after the structure of the relay product is shaped and the material of the tab structure 222 is selected, the magnitude of F is mainly equal to W/L during the use of the relay ³ The ratio of (a) to (b) is correlated. Then to ensure that the magnitude of F remains stable before and after disengagement of the first welded structure 228, it is necessary to ensure that the W/L is maintained ³ The ratio of (A) to (B) is stable.

Therefore, in the present embodiment, as shown in fig. 14A and 14B, the width of the position of the first welding structure 228 in the tab structure 222 is set as W1, and the width of the position of the second welding structure 229 is set as W2. The first welded structure 228 has a length L1 from the fold line 227 and the second welded structure 229 has a length L2 from the fold line 227. By optimizing the size, (W1/L1) ³ )≈(W2/L2 ³ ) Therefore, the stability of the reaction force F can be ensured when the first welding structure 228 works, when the first welding structure 228 is separated and the second welding structure 229 works, and further, the suction reaction force matching of the relay can be basically maintained unchanged, and the stability of the action voltage and the release voltage of the relay can be ensured.

Further, the maximum stress σ = b L/W T at the time of deformation of tab structure 222 ² . Wherein b is a constant.

With reference to fig. 16, the first welding structure 228 and the second welding structure 229 are disposed on a side of the welding portion 224 opposite to the movable spring body 221, and the widened portion 226 is disposed on a side of the welding portion 224 facing the movable spring body 221.

The connecting portion 223 includes a first connecting section 2231 and a second connecting section 2232 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.

The joints between the first connecting section 2231 and the movable spring body 221 and the joints between the first connecting section 2231 and the second connecting section 2232 are provided with circular arc/rounded corner transitions to reduce stress concentration.

The first connecting section 2231 extends in a direction perpendicular to the length direction D1 of the armature 21, the second connecting section 2232 extends in a direction parallel to the length direction D1 of the armature 21, and the second connecting section 2232 extends from the first connecting section 2231 toward one of the movable contacts of the movable spring body 221.

Body portion 225 is J-shaped and includes bend 2251 and extension 2252. One end of bend 2251 is connected to the other end of second connector 2232 and extension 2252 is connected to the other end of bend 2251. The first weld structure 228 and the second weld structure 229 are provided at the extension 2252. The bent segment 2251 is a 180 degree turn such that the extension segment 2252 extends from the bent segment 2251 to the other moving contact of the moving spring body 221. The connection between the bending segment 2251 and the second connecting segment 2232 is provided with a folding line 227.

As shown in fig. 14A, 14B and 16, the width t1 of the connection portion 223 of the bending section 2251 and the connection portion 223 is less than or equal to the width t2 of the portion of the extension 2252 where the first welding structure 228 and the second welding structure 229 are provided, that is, t1 is less than or equal to t2. Meanwhile, the width t3 of the first connecting section 2231 is greater than the width t1 of the bending section 2251 and greater than the width t2 of the part of the extending section 2252 where the first welding structure 228 and the second welding structure 229 are located, i.e., t3 > t1, and t3 > t2. Through such design, effectively increased armature part's rigidity, when armature swing, movable spring 22's deformation forms at bending section 2251, is convenient for improve the stability of product parameter.

The first welding structure 228 and the second welding structure 229 are disposed on a side of the extension 2252 facing away from the moving spring body 221, and the first widened section 2261 and the second widened section 2262 are disposed on a side of the extension 2252 facing toward the moving spring body 221.

As an example, the width of the tab structure 222 at the position of the fold line 227 is less than or equal to the width of the first and second weld structures 228, 229.

As shown in fig. 17 to 19, fig. 17 is a schematic side view of a relay case 1 according to a second embodiment of the present invention. Fig. 18 shows a side view of the movable spring plate 22 of fig. 17. Fig. 19 shows a partially enlarged view at X3 in fig. 18. The parts of the second embodiment that are the same as the parts of the first embodiment will not be described again, and the differences are as follows:

the portion of the welding portion 224 where the first welding structure 228 and the second welding structure 229 are provided is bent toward the base portion 3 with respect to the movable spring body 221. That is, the welding portion 224 is bent downward with respect to the movable spring body 221 and the connection portion 223 by the folding line 227.

Referring to fig. 17 and 18, an included angle β is formed between the welding portion 224 and the movable spring body 221. When the first welding structure 228 and the second welding structure 229 of the welding portion 224 are horizontally welded on the welding table 3332, the moving spring body 221 is high on the left and low on the right. Therefore, when the portion of the welding portion 224 provided with the first welding structure 228 and the second welding structure 229 is bent with respect to the movable spring body 221 toward the base portion 3, the armature 21 on the coil terminal 34 side comes into contact with the pole face of the iron core 32, which is a normally open end; the armature 21 on the side away from the coil terminal 34 is separated from the pole surface of the core 32 and is a normally closed end.

Therefore, through the arrangement of the folding line 227, the welding part 224 can be turned upwards or downwards as required, and the normally open end and the normally closed end of the relay can be conveniently adjusted adaptively according to the use requirements.

As shown in fig. 20 to 22B, fig. 20 and 21 are schematic views of a movable portion 2 of a relay according to a third embodiment of the present invention from two different perspectives. Fig. 22A is a schematic perspective view of one movable contact spring of a relay according to a third embodiment of the present invention, and fig. 22B is a schematic perspective view of another movable contact spring of a relay according to a third embodiment of the present invention. The third embodiment is the same as the first and second embodiments and is not repeated, but the differences are:

the tab structure 222 does not include the fold line 227, but includes the welding portion 224 and the connecting portion 223 coplanar with the movable spring body 221.

As shown in fig. 23A and 23B, fig. 23A is a schematic diagram of one movable spring of a relay according to a fourth embodiment of the present invention. Fig. 23B is a schematic view of another movable spring of a relay according to a fourth embodiment of the present invention. The parts of the fourth embodiment that are the same as the above embodiments are not repeated, but the differences are as follows:

when the parameter variation of the product is not sensitive or the parameter margin is large, the widened portion 226 is provided only corresponding to the first welded structure 228, and the second welded structure 229 does not have the widened portion 226 provided.

It is understood that the various embodiments/implementations provided by the present invention can be combined without contradiction, and are not illustrated herein.

In the embodiments of the present invention, the terms "first", "second", "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; the term "plurality" means two or more unless expressly limited otherwise. The terms "mounted," "connected," "fixed," and the like are to be construed broadly, and for example, "connected" may be a fixed connection, a removable connection, or an integral connection; "coupled" may be direct or indirect through an intermediary. The specific meaning of the above terms in the embodiments of the present invention can be understood by those skilled in the art according to specific situations.

In the description of the embodiments of the present invention, it should be understood that the terms "upper", "lower", "left", "right", "front", "rear", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of describing the embodiments of the present invention and simplifying the description, but do not indicate or imply that the device or unit indicated must have a specific direction, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the embodiments of the present invention.

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

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made to the present invention by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the embodiments of the present invention should be included in the scope of the embodiments of the present invention.

Claims (17)

1. A relay with high action reliability comprises a base part and a movable part which can swing relative to the base part, wherein the movable part comprises a movable spring, an armature and a first plastic body, and the movable spring and the armature are assembled into a whole through the first plastic body; characterized in that, the movable reed includes:

a movable spring body;

the welding piece structure comprises a connecting part and a welding part, and the welding part is connected to the movable spring body through the connecting part; the welding part comprises a first welding structure and a second welding structure which are welded with the base part, and the first welding structure and the second welding structure are positioned on the same side of the connecting part in the length direction of the armature.

2. The relay according to claim 1, wherein the welding portion is not coplanar with the movable spring body.

3. The relay with high operation reliability according to claim 2, wherein the connection portion is disposed coplanar with the movable spring body;

the connecting portion with the junction of welding part is equipped with the broken line, the welding part passes through the broken line for the connecting portion setting of buckling.

4. The relay with high operation reliability according to claim 3, wherein the portion of the welding portion where the first welding structure and the second welding structure are provided is bent with respect to the movable spring body in a direction away from the base portion; or the like, or, alternatively,

the portion of the welding portion where the first welding structure and the second welding structure are provided is bent toward a direction close to the base portion with respect to the movable spring body.

5. The relay with high operation reliability according to claim 3, wherein the extending direction of the fold line is perpendicular to the length direction of the armature.

6. The relay with high operation reliability according to claim 3, wherein the folding line is located on the other side of the connection portion with respect to the first and second welding structures along a length direction of the armature.

7. The relay with high action reliability as claimed in claim 3, wherein a normally open moving contact and a normally closed moving contact are respectively disposed at two ends of the moving spring body along the length direction of the armature, and a connecting line between the normally open moving contact and the normally closed moving contact passes through a middle point of the folding line.

8. The relay with high operation reliability according to claim 1, wherein the welding part comprises:

the body part is connected to the movable spring body through the connecting part, and the first welding structure and the second welding structure are arranged on the body part; and

a widened portion connected to the body portion and corresponding to a position of the first and/or second weld structure in a width direction of the armature.

9. The relay according to claim 8, wherein the first weld structure is closer to the connection portion than the second weld structure along a length direction of the armature;

the widened portion includes a first widened portion corresponding to a position of the first welded structure and a second widened portion corresponding to a position of the second welded structure;

the dimension of the first widened section is smaller than the dimension of the second widened section along the width direction of the armature.

10. The relay with high operational reliability according to claim 8, wherein the first weld structure is closer to the connection portion than the second weld structure along a length direction of the armature;

the widened portion includes a first widened portion corresponding to a position of the first welded structure and a second widened portion corresponding to a position of the second welded structure;

the first widening section completely covers the position of the first welding structure in the length direction of the armature, and the second widening section completely covers the position of the second welding structure in the length direction of the armature.

11. The relay according to claim 10, wherein a starting point of the first widened section is located closer to the connection portion with respect to the first welded structure along a length direction of the armature.

12. The relay according to claim 8, wherein the first welding structure and the second welding structure are provided on a side of the welding portion facing away from the movable spring body, and the widened portion is provided on a side of the welding portion facing toward the movable spring body.

13. The relay with high action reliability according to claim 1, wherein a normally open moving contact and a normally closed moving contact are respectively arranged at two ends of the moving spring body along the length direction of the armature, and the planes of the normally open moving contact and the normally closed moving contact are coplanar with the pole surface of the armature; or the plane of the normally open movable contact and the normally closed movable contact is higher than the pole surface of the armature.

14. The relay with high operation reliability as claimed in claim 1, wherein a recess is further provided on a side of the movable spring body facing the soldering lug structure, and the recess is provided at an edge of a connection portion of the connecting portion and the movable spring body.

15. The relay with high operational reliability according to claim 1, wherein the welding portion is disposed coplanar with the movable spring body.

16. The relay with high operation reliability according to claim 1, wherein the welding part comprises:

one end of the bending section is connected to the connecting part; and

one end of the extension section is connected to the other end of the bending section; the first welding structure and the second welding structure are arranged on the extension section;

the width of the part of the bending section connected with the connecting part is smaller than or equal to the width of the part of the extending section provided with the first welding structure and the second welding structure.

17. The relay with high operation reliability according to claim 16, wherein the connection portion includes:

one end of the first connecting section is connected to the movable spring body; the width of the first connecting section is greater than that of the bending section, and is greater than that of the part of the extending section, which is provided with the first welding structure and the second welding structure; and

one end of the second connecting section is connected to the other end of the first connecting section, and the other end of the second connecting section is connected to the bending section; the first connecting section is perpendicular to the second connecting section.

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