Relay

Abstract

The present application discloses a relay, comprising a pair of stationary contacts (22), movable contact blades (31), a push rod component (33), and an elastic assembly (32). The movable contact blades (31) are used for being in contact with or separated from the pair of stationary contacts (22); the push rod component (33) comprises a positioning member (50) made of a metal material; the elastic assembly (32) is made of a metal material and used for providing contact pressure to the movable control blades (31); and the elastic assembly (32) is positioned by and connected to the positioning member (50).

Description

relay

[0001] Related applications

[0002] This application claims priority to Chinese patent application number 2024101754368, entitled “RELAY,” filed on February 7, 2024, the entirety of which is incorporated herein by reference. Technical Field

[0003] The present application relates to the technical field of electric control devices, in particular to a relay. Background Art

[0004] A relay is an electronic control device with a control circuit (also known as an input circuit) and a controlled system (also known as an output circuit). It is commonly used in automatic control circuits. A relay is essentially an "automatic switch" that uses a smaller current to control a larger one. Therefore, it plays a role in automatic regulation, safety protection, and circuit switching.

[0005] A high-voltage DC relay is a type of relay that consists of a pair of stationary contacts and a moving contact. The moving contact's ends, along their length, are designed to contact the stationary contacts, thereby closing the moving and stationary contacts. However, conventional relays often experience unreliable contact between the moving contacts and the stationary contacts after a period of use. Summary of the Invention

[0006] According to various embodiments of the present application, a relay is provided, which positions the elastic component through a positioning member, thereby improving the reliability of contact, and solving the problem of unreliable contact between dynamic and static contacts in the prior art.

[0007] The relay of the embodiment of the present application includes:

[0008] A pair of static contacts;

[0009] A movable contact piece, the movable contact piece is used to contact or separate with the pair of static contacts;

[0010] a push rod member including a positioning piece made of a metal material; and

[0011] An elastic component is made of a metal material and is used to provide contact pressure to the moving contact piece; wherein the elastic component is positioned and connected to the positioning member.

[0012] According to some embodiments of the present application, the push rod member further includes a base and a push rod, wherein the base is connected to one axial end of the push rod;

[0013] The positioning member is connected to the base.

[0014] According to some embodiments of the present application, the base is made of plastic material, and the base, the push rod and the positioning member are integrally formed.

[0015] According to some embodiments of the present application, the base, the push rod and the positioning member are integrally formed by injection molding.

[0016] According to some embodiments of the present application, the push rod member further includes a contact bracket, and the movable contact piece is mounted on the contact bracket via the elastic component;

[0017] The portion where the contact bracket is connected to the base is the positioning piece.

[0018] According to some embodiments of the present application, the elastic component includes a first leaf spring, and the first leaf spring is provided between the movable contact piece and the positioning member;

[0019] The first leaf spring is positioned and connected to the positioning member.

[0020] According to some embodiments of the present application, the first leaf spring is connected to the movable contact piece via an anti-rotation structure, and the anti-rotation structure is used to limit the relative rotation of the first leaf spring and the movable contact piece along the axis of the push rod member.

[0021] According to some embodiments of the present application, the positioning member has a first flange, the folding direction of the first flange is toward the first leaf spring, and the first leaf spring has a positioning portion, and the positioning portion is positioned and matched with the first flange.

[0022] According to some embodiments of the present application, the positioning portion of the first leaf spring is a second flange, and the folding direction of the second flange is toward the positioning member;

[0023] The first flange is sleeve-fitted with the second flange.

[0024] According to some embodiments of the present application, the first flange is formed by folding the edge of the first through hole of the positioning member, and the second flange is formed by folding the edge of the second through hole of the first leaf spring.

[0025] According to some embodiments of the present application, the positioning member further includes a positioning plate, which is a flat plate structure. The first flange is convexly arranged on one side surface of the positioning plate in the thickness direction, and the thickness of the positioning plate is greater than the thickness of the first leaf spring.

[0026] According to some embodiments of the present application, along the thickness direction of the positioning member, the height of the first flange is greater than the height of the second flange.

[0027] According to some embodiments of the present application, the elastic assembly further includes a second leaf spring, the second leaf spring being stacked with the first leaf spring; the second leaf spring having a third flange, the folding direction of the third flange being toward the positioning member;

[0028] One of the second flange and the third flange is sleeved on the outer circumferential surface of the first flange, and the first flange is sleeved on the outer circumferential surface of the other one of the second flange and the third flange.

[0029] According to some embodiments of the present application, the third flange is formed by folding the edge of the third through hole of the second leaf spring.

[0030] According to some embodiments of the present application, the positioning member further includes a positioning plate, which is a flat plate structure. The first flange is convexly arranged on one side surface of the positioning plate in the thickness direction, and the thickness of the positioning plate is greater than the thickness of the second leaf spring.

[0031] According to some embodiments of the present application, along the thickness direction of the positioning member, the height of the first flange is greater than the height of the third flange.

[0032] According to some embodiments of the present application, the base of the push rod member further has a positioning column, which passes through the area surrounded by the first flange, the area surrounded by the second flange, and the area surrounded by the third flange.

[0033] According to some embodiments of the present application, the relay further includes a first magnetic conductor, which is arranged on the side of the moving contact piece facing the static contact, and on a target plane, there is an overlapping area between the orthographic projections of the first magnetic conductor and the moving contact piece; the target plane is perpendicular to the movement direction of the moving contact piece.

[0034] According to some embodiments of the present application, the relay further includes a second magnetic conductor, and the second magnetic conductor is fixedly connected to the side of the moving contact piece facing away from the static contact, forming a magnetic circuit between the second magnetic conductor and the first magnetic conductor.

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

[0036] In the relay of the embodiment of the present application, the elastic component and the positioning member are both made of metal material, and the elastic component and the positioning member are positioned and connected. During the process of deformation of the elastic component under pressure, the positioning reliability between the elastic component and the positioning member is enhanced, thereby ensuring the consistency of the contact pressure between the moving contact piece and the pair of static contacts, and avoiding the problem of unilateral adhesion or unilateral inability to disconnect due to the pressure difference between the moving contact piece and the pair of static contacts, resulting in a larger contact resistance between the moving contact piece with smaller contact pressure and the static contact.

[0037] Furthermore, the positioning member, as part of the contact bracket, serves to position the elastic component. In other words, the embodiment of the present application utilizes the existing contact bracket to position the elastic component. This effectively solves the elastic component positioning problem without adding additional components, saving material costs while maintaining the size of the relay.

[0038] Furthermore, the positioning reliability between the elastic component and the positioning member is enhanced, thereby ensuring the consistency of the contact pressure between the movable contact piece and the pair of static contacts, thereby also ensuring the anti-short-circuit effect of the anti-short-circuit structure.

[0039] Furthermore, a positioning effect is achieved between the positioning member and the first leaf spring, as well as between the first leaf spring and the moving contact piece, thereby ensuring the consistency of the contact position of the moving contact piece, thereby ensuring the consistency of the arc starting point position, and improving the stability of the product operation.

[0040] Furthermore, the thickness of the first flange is relatively thick, which reduces the requirements for the processing accuracy of the first flange, is conducive to controlling the verticality of the first flange, and further improves the positioning effect.

[0041] Furthermore, the second flange of the first leaf spring and the third flange of the second leaf spring are respectively arranged on the inner surface and outer surface of the first flange of the positioning member, and both use the first flange of the positioning member as a positioning reference, reducing the positioning size chain and thereby improving the positioning effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the conventional technology, the following briefly introduces the drawings required for use in the embodiments or the conventional technology descriptions. Obviously, the drawings described below are merely embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the disclosed drawings without any creative work.

[0043] FIG1 is a schematic top view of a relay according to an embodiment of the present application.

[0044] FIG. 2 shows a cross-sectional view along the AA cutting line in FIG. 1 .

[0045] FIG3 is a schematic side view of a moving assembly according to an embodiment of the present application.

[0046] FIG. 4 shows a cross-sectional view along the BB section line in FIG. 3 .

[0047] FIG5 is a perspective schematic diagram showing a first leaf spring according to an embodiment of the present application.

[0048] FIG6 is a perspective schematic diagram showing a positioning member according to an embodiment of the present application.

[0049] FIG. 7 shows a cross-sectional view along the CC cutting line in FIG. 6 .

[0050] FIG8 is a perspective schematic diagram showing a second leaf spring according to an embodiment of the present application.

[0051] FIG. 9 shows a partial enlarged view of point X1 in FIG. 4 .

[0052] The reference numerals are as follows: 21, insulating cover; 211, mounting hole; 22, static contact; 24, frame; 25, yoke plate; 251, first through-hole; 26, arc-extinguishing portion; 261, yoke clamp; 262, arc-extinguishing magnet; 27, metal cover; 30, moving assembly; 31, moving contact piece; 32, elastic assembly; 321, first leaf spring; 321a, second flange; 321b, first substrate; 321c, first elastic arm; 321d, second through-hole; 322, second leaf spring; 322a, third flange; 322b, second substrate; 322c, second elastic arm; 322d, third through-hole; 33, push rod member; 331, push rod; 332, base; 3321, positioning column; 333, contact bracket; 3331, top wall; 3332, side wall; 3333, card hole; 40, magnetic circuit portion; 41, moving iron core; 42, stationary iron core; 421, second through hole; 43, coil frame; 44, coil; 45, magnetic tube; 46, reset member; 47, U-shaped yoke; 471, bottom yoke plate; 472, side yoke plate; 50, positioning member; 51, first flange; 52, card; 53, positioning piece; 54, first through hole; 61, first magnetic conductor; 62, second magnetic conductor; D1, first direction; D2, second direction; D3, third direction. DETAILED DESCRIPTION

[0053] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in many 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 concepts of the example embodiments to those skilled in the art. Like reference numerals in the figures represent like or similar structures, and thus their detailed description will be omitted.

[0054] It is understood that the terms "including" and "having" and any variations thereof in the embodiments of the present application are intended to cover non-exclusive inclusions. 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 may optionally include steps or units not listed, or may optionally include other steps or components inherent to the process, method, product, or apparatus.

[0055] As shown in FIG. 1 and FIG. 2 , the relay according to the embodiment of the present application includes an insulating cover 21 , a yoke plate 25 , a pair of static contacts 22 , an arc extinguishing portion 26 , a moving assembly 30 and a magnetic circuit portion 40 .

[0056] As shown in Figures 1 and 2, a pair of static contacts 22 are mounted on top of the insulating cover 21. At least a portion of each static contact 22 is located within the insulating cover 21. A static contact point is also provided at the bottom of each static contact 22. The static contact point can be integrally or separately provided at the bottom of the static contact 22. One static contact 22 serves as a terminal for current inflow, and the other static contact 22 serves as a terminal for current outflow.

[0057] In the embodiment of the present application, the top of the insulating cover 21 is provided with two mounting holes 211, and a pair of static contacts 22 are respectively disposed in the two mounting holes 211. Moreover, each static contact 22 can be connected to the insulating cover 21 by welding, but the present invention is not limited thereto.

[0058] It is understandable that the insulating cover 21 may be made of ceramic material, that is, the insulating cover 21 is a ceramic cover, but is not limited thereto. For example, in other embodiments, the insulating cover 21 may also be made of plastic material.

[0059] In an embodiment of the present application, the insulating cover 21 is made of ceramic material, and the insulating cover 21 is connected to the yoke iron plate 25 through a frame piece 24. The frame piece 24 can be a metal piece with an annular structure, such as an iron-nickel alloy. One end of the frame piece 24 is connected to the opening edge of the insulating cover 21, for example, by laser welding, brazing, resistance welding, gluing, etc. The other end of the frame piece 24 is connected to the yoke iron plate 25, which can also be done by laser welding, brazing, resistance welding, gluing, etc. A frame piece 24 is provided between the insulating cover 21 and the yoke iron plate 25 to facilitate the connection between the insulating cover 21 and the yoke iron plate 25.

[0060] Continuing with Figure 1 , the movable assembly 30 includes a movable contact piece 31, an elastic assembly 32, and a push rod member 33. For ease of illustration, the arrangement direction of the pair of stationary contacts 22 is defined as a first direction D1, and the movement direction of the movable contact piece 31 is defined as a second direction D2. The first direction D1 is perpendicular to the second direction D2. A direction perpendicular to both the first and second directions D1 and D2 is defined as a third direction D3.

[0061] The movable contact piece 31 is disposed in the insulating cover 21 , and two ends of the movable contact piece 31 along the first direction D1 are respectively used to contact or separate from the bottoms of the pair of stationary contacts 22 .

[0062] The movable contact piece 31 may include a contact body and two movable contacts. The movable contacts may be separate parts, and the two movable contacts are connected to the two ends of the contact body along the first direction D1. Of course, in other embodiments, the two movable contacts may also be integrally formed at the two ends of the contact body along the first direction D1.

[0063] In addition, the movable contact may protrude from the surface of the contact body facing the static contact 22 , or may be flush with the surface of the contact body facing the static contact 22 .

[0064] It should be noted that the movable assembly 30 may include one or more movable contact pieces 31, where "a plurality" refers to two or more. When there are multiple movable contact pieces 31, the multiple movable contact pieces 31 are arranged side by side along the third direction D3, and each movable contact piece 31 has two ends along the first direction D1 configured to respectively contact or separate from a pair of stationary contacts 22.

[0065] The push rod member 33 is movably provided in the first through hole 251 of the yoke plate 25, and part of the push rod member 33 extends out of the side surface of the yoke plate 25 facing the static contact 22, and part of the push rod member 33 extends out of the side surface of the yoke plate 25 facing away from the static contact 22.

[0066] The movable contact piece 31 is movably mounted on the portion of the push rod member 33 that extends from the side surface of the yoke plate 25 toward the stationary contact 22. The elastic component 32 is connected to the push rod member 33 and the movable contact piece 31 and is used to apply an elastic force to the movable contact piece 31 toward the stationary contact 22 to provide contact pressure.

[0067] A metal cover 27 is further provided on the side of the yoke plate 25 facing away from the static contact 22. The metal cover 27 covers the first through-hole 251 of the yoke plate 25. The portion of the push rod member 33 extending from the side of the yoke plate 25 facing away from the static contact 22 is inserted into the metal cover 27.

[0068] Continuing with Figure 2, the magnetic circuit 40 includes a moving iron core 41, a stationary iron core 42, a coil bobbin 43, and a coil 44. The coil bobbin 43 is hollow and cylindrical and made of insulating material. It is located on the side of the yoke plate 25 facing away from the stationary contact 22 and surrounds the outer circumference of the metal cover 27. The coil 44 is wound around the outer circumference of the coil bobbin 43.

[0069] The static iron core 42 is fixedly disposed in the metal cover 27, and a portion of the static iron core 42 is inserted into the first through-hole 251. The static iron core 42 has a second through-hole 421, and the second through-hole 421 corresponds to the position of the first through-hole 251, so that the push rod member 33 can be movably penetrated in the first through-hole 251 and the second through-hole 421. The moving iron core 41 is movably disposed in the metal cover 27 and is arranged relative to the static iron core 42 in the second direction D2. The moving iron core 41 is connected to the push rod member 33 and is used to be attracted by the static iron core 42 when the coil 44 is energized. The moving iron core 41 and the push rod member 33 can be connected by screwing, riveting, welding or other methods.

[0070] As shown in FIG2 , the magnetic circuit portion 40 further includes a reset member 46 . The reset member 46 is located in the metal cover 27 and disposed between the static iron core 42 and the movable iron core 41 . The reset member 46 is used to reset the movable iron core 41 when the coil 44 is de-energized.

[0071] In one embodiment, the reset element 46 is a spring and is sleeved on the outer circumference of the push rod member 33 .

[0072] It should be noted that when the coil 44 is energized, the stationary iron core 42 attracts the movable iron core 41 to move upward, and the movable iron core 41 drives the push rod member 33 upward. When the movable contact piece 31 contacts the stationary contact 22, the movable contact piece 31 is stopped by the stationary contact 22, while the push rod member 33 continues to move upward until the overtravel is completed.

[0073] During the overtravel process, the elastic component 32 is squeezed by the push rod member 33 and can provide elastic force to the movable contact piece 31 to provide contact pressure.

[0074] As shown in Figure 2, the magnetic circuit portion 40 also includes a U-shaped yoke 47 and a magnetic tube 45. The U-shaped yoke 47 includes a bottom yoke plate 471 and two side yoke plates 472. The two side yoke plates 472 are respectively connected to the two ends of the bottom yoke plate 471 along the first direction D1, and the two side yoke plates 472 are arranged opposite each other along the first direction D1. The bottom yoke plate 471 is located on the side of the coil frame 43 facing away from the static contact 22. The two side yoke plates 472 are respectively connected to the two ends of the yoke plate 25 along the first direction D1 at their ends away from the bottom yoke plate 471. The coil 44, coil frame 43, metal cover 27, and movable iron core 41 are accommodated in the space enclosed by the yoke plate 25 and the bottom yoke plate 471 and the two side yoke plates 472 of the U-shaped yoke 47. The magnetic tube 45 is sleeved on the outer periphery of the metal cover 27 and is located between the metal cover 27 and the coil frame 43.

[0075] As shown in Figure 2, the arc-extinguishing portion 26 includes an arc-extinguishing magnet 262, which is disposed on the outer side of the insulating cover 21. By disposing the arc-extinguishing magnet 262 around the outer periphery of the insulating cover 21, a magnetic field is generated around the stationary contact 22 and the movable contact piece 31. Consequently, the arc generated between the movable contact piece 31 and the stationary contact 22 is stretched away from each other by the magnetic field, thereby extinguishing the arc.

[0076] In one embodiment, the arc extinguishing magnet 262 is a permanent magnet.

[0077] In the embodiment of the present application, the number of the arc-extinguishing magnets 262 is two, and the two arc-extinguishing magnets 262 are respectively located on two outer side surfaces of the insulating cover 21 along the first direction D1.

[0078] The arc extinguishing portion 26 further includes a yoke clamp 261, and an arc extinguishing magnet 262 is disposed between a surface of the yoke clamp 261 facing the insulating cover 21 and the outer peripheral surface of the insulating cover 21. The design of the yoke clamp 261 surrounding the arc extinguishing magnet 262 prevents the magnetic field generated by the arc extinguishing magnet 262 from spreading outward and affecting the arc extinguishing effect.

[0079] In one embodiment, the yoke clip 261 is made of a soft magnetic material, which may include but is not limited to iron, cobalt, nickel, and alloys thereof.

[0080] It is understood that the number of yoke clips 261 can be one or two. When there is one yoke clip 261, the yoke clip 261 forms an annular structure that surrounds the outer circumference of the insulating cover 21. When there are two yoke clips 261, each yoke clip 261 can be U-shaped and arranged opposite each other along the first direction D1, with the two yoke clips 261 respectively surrounding the two ends of the insulating cover 21 along the first direction D1.

[0081] It should be noted that, in the relays in the prior art, the moving contacts at both ends of the moving contact piece often have unbalanced contact with a pair of static contacts, resulting in unreliable contact. That is, during the closing process, the moving contact at one end of the moving contact piece has already contacted one static contact, while the moving contact at the other end of the moving contact piece has not yet contacted the other static contact; during the opening process, the moving contact at one end of the moving contact piece has already separated from one static contact, while the moving contact at the other end of the moving contact piece is still in contact with the other static contact.

[0082] The inventors of the present application have discovered in their research that the reason why the contacts of the relays in the prior art are unreliable is that the positioning design of the elastic component is poor, resulting in poor positioning of the moving contact piece.

[0083] Based on this, the present application proposes a relay that positions an elastic component through a positioning member, thereby improving the contact reliability of the moving and static contacts.

[0084] In detail, as shown in FIG3 and FIG4 , the push rod member 33 includes a positioning member 50 made of metal material; the elastic component 32 is made of metal material and is used to provide contact pressure to the movable contact piece 31 ; wherein the elastic component 32 is positioned and connected to the positioning member 50 .

[0085] In the relay of the embodiment of the present application, the elastic component 32 and the positioning member 50 are both made of metal material, and the elastic component 32 and the positioning member 50 are positioned and connected. During the process of deformation of the elastic component 32 under pressure, the positioning reliability between the elastic component 32 and the positioning member 50 is enhanced, thereby ensuring the consistency of the contact pressure between the moving contact piece 31 and the pair of static contacts 22, and avoiding the problem of unilateral adhesion or unilateral inability to disconnect due to the pressure difference between the moving contact piece 31 and the pair of static contacts 22, resulting in a large contact resistance between the moving contact piece 31 with smaller contact pressure and the static contact 22.

[0086] In one embodiment, the push rod member 33 further includes a base 332 and a push rod 331 , wherein the base 332 is connected to one axial end of the push rod 331 ; and the positioning member 50 is connected to the base 332 .

[0087] Furthermore, the base 332 is made of plastic material, and the base 332, the push rod 331 and the positioning member 50 are integrally formed. Furthermore, the base 332, the push rod 331 and the positioning member 50 are integrally formed by injection molding.

[0088] It can be understood that the base 332, the push rod 331 and the positioning member 50 are integrally injection-molded to ensure the relative positions of the positioning member 50, the base 332 and the push rod 331, and to prevent the positioning member 50 from moving relative to the base 332 and affecting the positioning effect of the positioning member 50 on the elastic component 32.

[0089] Of course, the connection between the positioning member 50 and the base 332 is not limited to an injection-molded connection. For example, in other embodiments, the positioning member 50 may be provided with a connection hole, and the base 332 may be provided with a positioning protrusion, which is inserted into the connection hole of the positioning member 50. When the positioning member 50 has only one connection hole, the connection hole has a non-circular shape, such as a rectangle, an ellipse, a triangle, etc., and the cross-sectional shape of the positioning protrusion is adapted to the shape of the connection hole. When the positioning member 50 has multiple connection holes, the connection holes may be circular or non-circular in shape, and the multiple positioning protrusions of the base 332 are respectively inserted into the multiple connection holes.

[0090] As shown in FIG4 , the push rod member 33 further includes a contact bracket 333 , to which the movable contact piece 31 is mounted via an elastic component 32 ; the portion connecting the contact bracket 333 and the base 332 is a positioning member 50 . In other words, the positioning member 50 serves as a part of the contact bracket 333 .

[0091] In the embodiment of the present application, the positioning member 50, as part of the contact support 333, serves to position the elastic assembly 32. In other words, the embodiment of the present application utilizes the existing contact support 333 to position the elastic assembly 32. This effectively solves the positioning problem of the elastic assembly 32 without adding additional components, saving material costs while maintaining the size of the relay.

[0092] Of course, in other embodiments, the positioning member 50 may also be a component independent of the contact bracket 333 . The positioning member 50 may be connected to the base 332 by injection molding or by other methods, which will not be described in detail here.

[0093] Continuing with Figure 4 , the contact support 333 also includes a top wall 3331 and two side walls 3332. The top wall 3331 is located on the side of the movable contact piece 31 facing the stationary contact 22. The two side walls 3332 are connected to the top wall 3331 at both ends along the third direction D3, forming an inverted U-shape. Each side wall 3332 has a latching hole 3333 at one end away from the top wall 3331. The positioning member 50 has latches 52 at both ends along the third direction D3, and the two latches 52 are respectively latched into the two latching holes 3333.

[0094] Of course, in other embodiments, the contact bracket 333 may also be U-shaped, and the bottom of the U-shape is connected to the base 332 and can be regarded as a positioning member 50 .

[0095] As shown in Figures 2 and 4, the relay of the embodiment of the present application also includes an anti-short-circuit structure, which is used to generate a suction force on the moving contact piece 31 along the contact pressure direction. The suction force can resist the electric repulsion between the moving contact piece 31 and the static contact 22 due to the short-circuit current, thereby preventing the moving contact piece 31 and the static contact 22 from bouncing apart.

[0096] As shown in Figure 2, the anti-short circuit structure includes a first magnetic conductor 61, which is arranged on the side of the moving contact piece 31 facing the static contact 22. There is an overlapping area between the orthographic projections of the first magnetic conductor 61 and the moving contact piece 31 on a target plane; the target plane is perpendicular to the movement direction (second direction D2) of the moving contact piece 31.

[0097] Furthermore, the anti-short circuit structure also includes a second magnetic conductor 62 . The second magnetic conductor 62 is fixedly connected to the side of the movable contact piece 31 facing away from the static contact 22 . A magnetic circuit is formed between the second magnetic conductor 62 and the first magnetic conductor 61 .

[0098] In one embodiment, the number of movable contact pieces 31 may be one or more. When there are multiple movable contact pieces 31, the first magnetic conductor 61 and the orthographic projections of each movable contact piece 31 on a target plane overlap. A second magnetic conductor 62 is fixedly connected to the side of each movable contact piece 31 facing away from the stationary contact 22. Furthermore, based on the principle that the magnitude of the electromotive repulsive force is proportional to the square of the current, the magnitude of the electromotive repulsive force at each contact point is significantly reduced, which helps improve the short-circuit resistance and enhances the reliability of the relay.

[0099] It is understandable that the first magnetic conductor 61 and the second magnetic conductor 62 can be straight-line or U-shaped, and can be made of soft magnetic materials such as iron, cobalt, nickel, and alloys thereof.

[0100] As described above, the positioning reliability between the elastic component 32 and the positioning member 50 is enhanced, ensuring the consistency of the contact pressure between the movable contact piece 31 and the pair of static contacts 22, thereby ensuring the anti-short-circuit effect of the anti-short-circuit structure.

[0101] As shown in FIG. 2 and FIG. 5 , the elastic component 32 includes a first leaf spring 321 . The first leaf spring 321 is disposed between the movable contact piece 31 and the positioning member 50 . The first leaf spring 321 is positioned and connected to the positioning member 50 .

[0102] The first leaf spring 321 includes a first base plate 321b, a first elastic arm 321c, and a second flange 321a. The second flange 321a is connected to a side surface of the first base plate 321b facing the positioning member 50, and the folding direction of the second flange 321a is toward the positioning member 50. The second flange 321a is formed by folding the edge of the second through hole 321d of the first leaf spring 321, and the second flange 321a is an annular structure. At least one first elastic arm 321c is provided on each side of the first base plate 321b along the first direction D1. When multiple first elastic arms 321c are provided on each side of the first base plate 321b, the multiple first elastic arms 321c are arranged along the third direction D3. In the embodiment of the present application, three first elastic arms 321c are provided on each side of the first base plate 321b, but the present invention is not limited thereto.

[0103] As shown in Figures 6 and 7, the positioning member 50 includes a positioning piece 53, a first flange 51, and a clip 52. The positioning piece 53 is a flat plate with clips 52 at both ends of the positioning piece 53 along the third direction D3. The first flange 51 is projecting from the side of the positioning piece 53 facing the first leaf spring 321, with the first flange 51 folded toward the first leaf spring 321. The first flange 51 is formed by folding the edge of the first through hole 54 of the positioning member 50 and has an annular structure.

[0104] In one embodiment, the first leaf spring 321 and the movable contact piece 31 are connected via an anti-rotation structure, which is used to limit the first leaf spring 321 and the movable contact piece 31 from rotating relative to each other along the axis of the push rod member 33 .

[0105] In the embodiment of the present application, a positioning effect is achieved between the positioning member 50 and the first leaf spring 321, and between the first leaf spring 321 and the moving contact piece 31, thereby ensuring the consistency of the contact position of the moving contact piece 31, thereby ensuring the consistency of the arc starting point position, and improving the stability of the product operation.

[0106] It is understandable that the anti-rotation structure can be a combination of a protrusion and a hole, or a riveted structure, a welded structure, an adhesive structure, etc., and this application does not specifically limit this.

[0107] As shown in Figures 2 and 8, the elastic assembly 32 also includes a second leaf spring 322, which overlaps the first leaf spring 321. The second leaf spring 322 can be located on the side of the first leaf spring 321 facing away from the positioning member 50. The second leaf spring 322 comprises a second base plate 322b, a second elastic arm 322c, and a third flange 322a. The second flange 321a is connected to the side of the second base plate 322b facing the positioning member 50, and the second flange 321a is folded toward the positioning member 50. The third flange 322a is formed by folding the edge of the third through hole 322d of the second leaf spring 322 and has an annular structure. At least one second elastic arm 322c is provided on each side of the second base plate 322b along the first direction D1. When multiple second elastic arms 322c are provided on each side of the second base plate 322b, the multiple second elastic arms 322c are arranged along the third direction D3. In the embodiment of the present application, three second elastic arms 322 c are respectively disposed on two sides of the second base plate 322 b , but the present invention is not limited thereto.

[0108] It can be understood that in one embodiment, the number of multiple first elastic arms 321c on both sides of the first substrate 321b corresponds to the number of multiple second elastic arms 322c on both sides of the second substrate 322b, and the multiple second elastic arms 322c of the second substrate 322b are respectively abutted against the multiple first elastic arms 321c of the first substrate 321b.

[0109] Of course, in other embodiments, the number of the multiple first elastic arms 321c on both sides of the first substrate 321b may not correspond to the number of the multiple second elastic arms 322c on both sides of the second substrate 322b. For example, a second elastic arm 322c with a wider width is provided on each side of the second substrate 322b, and multiple first elastic arms 321c are provided on each side of the first substrate 321b. A second elastic arm 322c on one side of the second substrate 322b simultaneously abuts against the multiple first elastic arms 321c on one side of the first substrate 321b.

[0110] As shown in Figure 9, the first flange 51 is sleeved on the outer circumference of the second flange 321a, and the third flange 322a is sleeved on the outer circumference of the first flange 51. In the embodiment of the present application, the first flange 51 of the positioning member 50 is used to simultaneously position the first leaf spring 321 and the second leaf spring 322.

[0111] It can be understood that the second flange 321a of the first leaf spring 321 and the third flange 322a of the second leaf spring 322 are respectively arranged on the inner surface and outer surface of the first flange 51 of the positioning member 50, and both use the first flange 51 of the positioning member 50 as a positioning reference, thereby reducing the positioning size chain and improving the positioning effect.

[0112] It should be noted that the number of first flanges 51 of the positioning member 50, the number of second flanges 321a of the first leaf spring 321 and the number of third flanges 322a of the second leaf spring 322 correspond to each other, and the corresponding first flanges 51, second flanges 321a and third flanges 322a can be one group or multiple groups.

[0113] When the corresponding first flange 51, second flange 321a, and third flange 322a are in a group, the shapes of the first flange 51, second flange 321a, and third flange 322a are non-circular ring structures. When the corresponding first flange 51, second flange 321a, and third flange 322a are in multiple groups, the shapes of the first flange 51, second flange 321a, and third flange 322a can be circular ring structures or non-circular ring structures.

[0114] In the embodiment of the present application, the number of corresponding first flanges 51, second flanges 321a and third flanges 322a is two groups, and the first flanges 51, second flanges 321a and third flanges 322a are in the shape of circular ring structures.

[0115] As shown in Figure 9, the thickness of the positioning piece 53 of the positioning member 50 is greater than the thickness of the first leaf spring 321 and greater than the thickness of the second leaf spring 322. In the embodiment of the present application, the thickness of the positioning piece 53 of the positioning member 50 is greater than the thickness of the first leaf spring 321 and the second leaf spring 322. Therefore, the thickness of the first flange 51 is greater than the thickness of the second flange 321a and the third flange 322a. As a result, the structural strength of the first flange 51 is increased, and the first flange 51 better positions the second flange 321a and the third flange 322a. In addition, the thicker thickness of the first flange 51 reduces the machining precision requirements of the first flange 51, facilitates controlling the verticality of the first flange 51, and further improves the positioning effect. In addition, the second flange 321a and the third flange 322a are positioned by the first flange 51 of the positioning member 50. Since the verticality of the first flange 51 is easy to control, the verticality requirements for the second flange 321a and the third flange 322a can be reduced, thereby reducing the difficulty of flanging the first leaf spring 321 and the second leaf spring 322.

[0116] The thicknesses of the first leaf spring 321 and the second leaf spring 322 may be equal or unequal.

[0117] In one embodiment, along the thickness direction (second direction D2) of the positioning member 50, the height of the first flange 51 is greater than the height of the second flange 321a and the third flange 322a. The heights of the second flange 321a and the third flange 322a may be equal or unequal.

[0118] It is understood that the positioning member 50, the first leaf spring 321, and the second leaf spring 322 are all provided with flanges. While ensuring the positioning effect, the thickness of the positioning member 50, the first leaf spring 321, and the second leaf spring 322 can be appropriately reduced, thereby saving material costs. Furthermore, the manufacturing difficulty of the flanges is reduced, and the size of the relay along the second direction D2 is reduced.

[0119] In addition, when the elastic component 32 only includes the first leaf spring 321, the positional relationship between the first flange 51 of the positioning member 50 and the second flange 321a of the first leaf spring 321 can be: the first flange 51 is arranged on the outer periphery of the second flange 321a, or the second flange 321a is arranged on the outer periphery of the first flange 51.

[0120] In a modified embodiment, the positioning structure between the positioning member 50 and the first leaf spring 321 can also be as follows: the positioning member 50 has a first flange 51, the first leaf spring 321 has a second through-hole 321d, and the first flange 51 is inserted into the second through-hole 321d to enable the positioning member 50 to position the first leaf spring 321. The positioning structure between the positioning member 50 and the second leaf spring 322 can also be as follows: the positioning member 50 has a first flange 51, the second leaf spring 322 has a third through-hole 322d, and the first flange 51 is inserted into the third through-hole 322d to enable the positioning member 50 to position the second leaf spring 322. The first through-hole 54 of the first leaf spring 321 corresponds to the position of the second through-hole 321d of the second leaf spring 322.

[0121] In another modified embodiment, a protrusion is provided on a surface of the positioning member 50 facing the first leaf spring 321 , and the protrusion passes through the first through hole 54 of the first leaf spring 321 and the second through hole 321 d of the second leaf spring 322 .

[0122] As shown in FIG9 , the base 332 of the push rod member 33 further includes a positioning post 3321. The positioning post 3321 extends through the area enclosed by the first flange 51, the area enclosed by the second flange 321a, and the area enclosed by the third flange 322a. The base 332 also includes the positioning post 3321, which is used to assist the positioning member 50 in positioning the first leaf spring 321 and the second leaf spring 322.

[0123] The relay of the embodiment of the present application has at least the following advantages and beneficial effects:

[0124] In the relay of the embodiment of the present application, the elastic component 32 and the positioning member 50 are both made of metal material, and the elastic component 32 and the positioning member 50 are positioned and connected. During the process of deformation of the elastic component 32 under pressure, the positioning reliability between the elastic component 32 and the positioning member 50 is enhanced, thereby ensuring the consistency of the contact pressure between the moving contact piece 31 and the pair of static contacts 22, and avoiding the problem of unilateral adhesion or unilateral inability to disconnect due to the pressure difference between the moving contact piece 31 and the pair of static contacts 22, resulting in a large contact resistance between the moving contact piece 31 with smaller contact pressure and the static contact 22.

[0125] Furthermore, the positioning member 50, as part of the contact support 333, serves to position the elastic assembly 32. In other words, the embodiment of the present application utilizes the existing contact support 333 to position the elastic assembly 32. This effectively solves the positioning problem of the elastic assembly 32 without adding additional components, saving material costs while maintaining the size of the relay.

[0126] Furthermore, the positioning reliability between the elastic component 32 and the positioning member 50 is enhanced, thereby ensuring the consistency of the contact pressure between the movable contact piece 31 and the pair of static contacts 22, thereby also ensuring the anti-short-circuit effect of the anti-short-circuit structure.

[0127] Furthermore, a positioning effect is achieved between the positioning member 50 and the first leaf spring 321 as well as between the first leaf spring 321 and the moving contact piece 31, thereby ensuring the consistency of the contact position of the moving contact piece 31, thereby ensuring the consistency of the arc starting point position and improving the stability of the product operation.

[0128] Furthermore, the thickness of the first flange 51 is relatively thick, which reduces the requirement for the processing accuracy of the first flange 51, is conducive to controlling the verticality of the first flange 51, and further improves the positioning effect.

[0129] Furthermore, the second flange 321a of the first leaf spring 321 and the third flange 322a of the second leaf spring 322 are respectively arranged on the inner surface and outer surface of the first flange 51 of the positioning member 50, and both use the first flange 51 of the positioning member 50 as a positioning reference, thereby reducing the positioning size chain and improving the positioning effect.

[0130] It is understandable that the various embodiments / implementations provided in this application can be combined with each other without causing any contradiction, and they will not be illustrated one by one here.

[0131] In the application examples, the terms "first", "second", and "third" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance; the term "plurality" refers to two or more, unless otherwise expressly defined. Terms such as "installed", "connected", "connected", and "fixed" should be understood in a broad sense. For example, "connected" can mean a fixed connection, a detachable connection, or an integral connection; "connected" can mean a direct connection or an indirect connection through an intermediate medium. For those skilled in the art, the specific meanings of the above terms in the application examples can be understood according to the specific circumstances.

[0132] In the description of the application embodiments, it should be understood that the terms "up", "down", "left", "right", "front", "back", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the application embodiments and simplifying the description, and do not indicate or imply that the device or unit referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the application embodiments.

[0133] Throughout this specification, terms such as "one embodiment," "some embodiments," and "specific embodiments" mean that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the claimed invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0134] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A relay, characterized in that: include: A pair of static contacts; A movable contact piece, the movable contact piece is used to contact or separate with the pair of static contacts; A push rod member, the push rod member including a positioning member made of a metal material; as well as An elastic component is made of a metal material and is used to provide contact pressure to the moving contact piece; wherein the elastic component is positioned and connected to the positioning member.

2. The relay according to claim 1, wherein: The push rod component further includes a base and a push rod, wherein the base is connected to one axial end of the push rod; The positioning member is connected to the base.

3. The relay according to claim 2, characterized in that The base is made of plastic material, and the base, the push rod and the positioning member are integrally formed.

4. The relay according to claim 3, characterized in that The base, the push rod and the positioning member are integrally formed by injection molding.

5. The relay according to claim 3, characterized in that The push rod component further includes a contact bracket, and the movable contact piece is mounted on the contact bracket through the elastic component; The portion where the contact bracket is connected to the base is the positioning piece.

6. The relay according to any one of claims 1 to 5, characterized in that: The elastic component includes a first leaf spring, and the first leaf spring is arranged between the movable contact piece and the positioning member; The first leaf spring is positioned and connected to the positioning member.

7. The relay according to claim 6, characterized in that The first leaf spring is connected to the movable contact piece via an anti-rotation structure, and the anti-rotation structure is used to limit the first leaf spring and the movable contact piece from rotating relative to each other along the axis of the push rod component.

8. The relay according to claim 6, characterized in that The positioning member has a first flange, the folding direction of the first flange is toward the first leaf spring, and the first leaf spring has a positioning portion, and the positioning portion is positioned and matched with the first flange.

9. The relay according to claim 8, characterized in that The positioning portion of the first leaf spring is a second flange, and the folding direction of the second flange is toward the positioning member; The first flange is sleeve-fitted with the second flange.

10. The relay according to claim 9, characterized in that The first flange is formed by folding the edge of the first through hole of the positioning member, and the second flange is formed by folding the edge of the second through hole of the first leaf spring.

11. The relay according to claim 9, characterized in that The positioning member further includes a positioning plate, which is a flat plate structure. The first flange is convexly provided on one side surface of the positioning plate in the thickness direction. The thickness of the positioning plate is greater than the thickness of the first leaf spring.

12. The relay according to claim 11, wherein: Along the thickness direction of the positioning member, the height of the first flange is greater than the height of the second flange.

13. The relay according to claim 9, characterized in that The elastic component further includes a second leaf spring, the second leaf spring being stacked with the first leaf spring; the second leaf spring having a third flange, the folding direction of the third flange being toward the positioning member; One of the second flange and the third flange is sleeved on the outer circumferential surface of the first flange, and the first flange is sleeved on the outer circumferential surface of the other one of the second flange and the third flange.

14. The relay according to claim 13, characterized in that The third flange is formed by folding the edge of the third through hole of the second leaf spring.

15. The relay according to claim 13, wherein: The positioning member further includes a positioning plate, which is a flat plate structure. The first flange is convexly provided on one side surface of the positioning plate in the thickness direction. The thickness of the positioning plate is greater than the thickness of the second leaf spring.

16. The relay according to claim 15, characterized in that Along the thickness direction of the positioning member, the height of the first flange is greater than the height of the third flange.

17. The relay according to claim 13, wherein: The base of the push rod component further has a positioning column, which passes through the area surrounded by the first flange, the area surrounded by the second flange, and the area surrounded by the third flange.

18. The relay according to any one of claims 1 to 5, characterized in that: The relay also includes a first magnetic conductor, which is arranged on the side of the moving contact piece facing the static contact. On a target plane, there is an overlapping area between the orthographic projections of the first magnetic conductor and the moving contact piece; the target plane is perpendicular to the movement direction of the moving contact piece.

19. The relay according to claim 18, wherein: The relay further includes a second magnetic conductor, and the second magnetic conductor is fixedly connected to the side of the movable contact piece facing away from the static contact, and a magnetic circuit is formed between the second magnetic conductor and the first magnetic conductor.

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