Contact apparatus and relay

Abstract

The present application relates to the technical field of electronic control devices, and in particular to a contact apparatus and a relay. The contact apparatus comprises: a static contact group, the static contact group comprising two static contacts; a movable reed assembly, wherein the movable reed assembly comprises a movable reed, and two ends of the movable reed can move relative to the static contact group, so that the two ends of the movable reed come into contact with or are separated from the static contact group; and an elastic member, wherein the elastic member is arranged on the side of the movable reed assembly distant from the static contact group, and an arc-shaped contact surface is provided between the elastic member and the movable reed assembly. The contact apparatus can realize self-adjustment of the movable reed within the movable reed assembly at any position, allowing the movable reed and the static contacts to reach a balanced contact point, thereby ensuring the effective use of the relay and improving the performance of the relay.

Description

Contact device and relay

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on January 18, 2024, with application number 202410076738.X and application name “Contact Device and Relay,” the entire contents of which are incorporated herein by reference. Technical Field

[0002] The present application relates to the technical field of electronic control devices, and in particular to a contact device and a relay. Background Art

[0003] A relay is an electronic control device that has a control system (also known as an input circuit) and a controlled system (also known as an output circuit). It is commonly used in automatic control circuits. Relays are essentially "automatic switches" that use smaller currents to control larger currents. Therefore, they play roles in circuits such as automatic regulation, safety protection, and circuit switching.

[0004] High-voltage DC relays are a type of relay. Most existing high-voltage DC relays use a spring-actuated, direct-acting structure, utilizing two stationary contacts and a spring. In vehicle applications, the contacts must disconnect under load to achieve a "switching" function. However, during use, the contacts can weld and adhere, rendering the relay inoperable.

[0005] Alternatively, the contact between the relay's stationary contact and movable spring can become eroded by the on-off switching, creating an uneven surface. If the original contact was two-point contact, this would result in inconsistent contact pressure on both sides. If the original contact was more than two points, if the two high points of contact were present at the moment of contact, the contact between the elastic member and the movable spring would form a flat support, preventing the movable spring from rotating. Consequently, the stationary contact and movable spring would maintain a two-point contact state, losing the original multi-point contact design's functionality, affecting relay performance and rendering it inoperable.

[0006] Application Contents

[0007] An embodiment of the present application provides a contact device and a relay, wherein the contact device can realize self-adjustment of a movable spring in a movable spring assembly at any position, so that the movable spring and the static contact reach a contact equilibrium point, thereby ensuring effective use of the relay and improving the performance of the relay.

[0008] An embodiment of the present application provides a contact device, comprising:

[0009] A static contact group, the static contact group comprising two static contacts;

[0010] A movable spring assembly, the movable spring assembly comprising a movable spring, both ends of which are movable relative to the static contact group so as to make the two ends of the movable spring contact or disengage from the static contact group;

[0011] An elastic member is placed on a side of the movable spring assembly away from the static contact group; an arc-shaped contact surface is provided between the elastic member and the movable spring assembly.

[0012] According to some embodiments of the application, only one arc-shaped contact surface is provided between the elastic member and the dynamic spring assembly; the orthographic projection of the arc-shaped contact surface on the dynamic spring assembly is located in the middle of the dynamic spring assembly.

[0013] According to some embodiments of the application, there are multiple groups of the dynamic spring assemblies, and only one arc-shaped contact surface is provided between each group of the dynamic spring assemblies and the elastic member.

[0014] According to some embodiments of the application, a line segment between any two points on a contour line of the orthographic projection of the dynamic spring assembly on the arc-shaped contact surface is an arc.

[0015] According to some embodiments of the application, a support member is provided between the dynamic spring assembly and the elastic member, and the arc-shaped contact surface is located between the support member and the dynamic spring assembly.

[0016] According to some embodiments of the application, the arc-shaped contact surface is provided on the movable spring assembly; when the movable spring contacts the static contact, the arc-shaped contact surface is used to adjust the state of the movable spring so that the movable spring reaches a balance point in contact with the static contact group.

[0017] According to some embodiments of the application, the dynamic spring assembly is provided with an adjustment portion on the side facing the elastic member, and the adjustment portion is a convex portion protruding toward the elastic member; the arc-shaped contact surface is located on the side surface of the convex portion facing the elastic member.

[0018] According to some embodiments of the application, the protrusion and the dynamic spring assembly are an integrated structure.

[0019] According to some embodiments of the application, the protrusion and the dynamic spring assembly are split structures.

[0020] According to some embodiments of the application, the protrusion is a hemispherical structure, and the flat side of the protrusion is installed on the side of the dynamic spring assembly facing the elastic member;

[0021] Alternatively, the convex portion is a sphere or an ellipsoid; the dynamic spring assembly is provided with a concave pit on a side facing the elastic member, and at least a portion of the convex portion is located in the concave pit.

[0022] According to some embodiments of the application, the elastic member is a spring; at least a portion of the protrusion is located within the inner ring contour of the elastic member; and the arc-shaped contact surface contacts the inner ring contour of the elastic member.

[0023] According to some embodiments of the application, the elastic member is a leaf spring; and the arc-shaped contact surface contacts a side surface of the leaf spring facing the dynamic spring assembly.

[0024] According to some embodiments of the application, the elastic member is a spring; a support member is provided between the dynamic spring assembly and the elastic member, the support member is provided outside the outer ring contour of the elastic member, and the support member is provided with a recess in at least a portion where the orthographic projection of the dynamic spring assembly is located within the orthographic projection of the dynamic spring assembly and the inner ring contour of the elastic member, and the recess is sunken in a direction away from the dynamic spring assembly;

[0025] At least a portion of the convex portion is placed in the concave portion; and the arc-shaped contact surface contacts an inner surface of the concave portion.

[0026] According to some embodiments of the application, the dynamic spring assembly is provided with an adjustment portion on a side facing the elastic member, and the adjustment portion is a recessed portion; the arc-shaped contact surface is located on a surface of the recessed portion facing the elastic member.

[0027] According to some embodiments of the application, the elastic member is a spring; a support member is provided between the dynamic spring assembly and the elastic member, the support member is covered on the outside of the outer ring contour of the elastic member, and the support member forms a bulge on at least a portion of the inner ring contour of the elastic member within the orthographic projection of the dynamic spring assembly; the bulge bulges toward the dynamic spring assembly, and at least a portion of the bulge is placed in the recess and contacts the arc-shaped contact surface.

[0028] According to some embodiments of the application, the arc-shaped contact surface is provided on the dynamic spring.

[0029] According to some embodiments of the application, the dynamic spring assembly further includes a first magnetic conductive component, which is disposed between the dynamic spring and the elastic component. The first magnetic conductive component is fixed relative to the dynamic spring, and the arc-shaped contact surface is disposed on the first magnetic conductive component.

[0030] According to some embodiments of the application, the contact device further includes a second magnetic conductive member, which is located on a side of the movable spring away from the elastic member to form a short-circuit ring around the movable spring assembly.

[0031] According to some embodiments of the application, the elastic member is a spring; at least a portion of the arc-shaped contact surface is located within the orthographic projection of the dynamic spring assembly, and the inner ring contour of the elastic member is located within the orthographic projection of the dynamic spring assembly.

[0032] According to some embodiments of the application, at least a portion of the arc-shaped contact surface in the middle of the orthographic projection of the dynamic spring assembly is located such that the inner circle contour of the elastic member is inside the orthographic projection of the dynamic spring assembly.

[0033] According to some embodiments of the application, the end surface of the elastic member that contacts the dynamic spring assembly is a ground surface;

[0034] Alternatively, the end surface of the elastic member that is in contact with the dynamic spring assembly is the original wire diameter surface.

[0035] According to some embodiments of the application, both ends of the movable spring are capable of moving relative to the static contact group to form two contact areas; the static contact and at least one of the movable springs in each of the contact areas have a contact portion; the number of the contact portions in the two contact areas is at least three, and each of the contact portions is used to achieve contact and disengagement between the movable spring and the static contact.

[0036] According to some embodiments of the application, a contact bracket is further included, and the dynamic spring assembly is installed on the contact bracket through the elastic member.

[0037] The present application also provides a relay, comprising a contact device provided by any of the above technical solutions.

[0038] One embodiment of the above application has at least the following advantages or beneficial effects:

[0039] The contact device provided in this application features an arcuate contact surface between the movable spring assembly and the elastic member. If the movable spring in the movable spring assembly contacts the stationary contact assembly, adhesion between the movable spring and the stationary contact occurs. As the relay switches from "on" to "off," the movable spring can reverse, generating a shear force at the bonded position to release the bond between the stationary contact and the movable spring, thereby protecting the performance of the contact device and, more importantly, the relay, and improving its reliability.

[0040] At the same time, since an arc-shaped contact surface is provided between the movable spring assembly and the elastic member, the movable spring assembly can be flipped. When the contact position between the movable spring and the static contact is ablated and worn, an uneven topography is produced, or the dimensional accuracy varies, the movable spring assembly can be automatically flipped. When there are two contact positions between the movable spring and the two static contacts, the state of the movable spring can be adjusted via the arc-shaped contact surface to ensure that the contact pressure at the two contact positions is the same. When there are more than two contact positions between the movable spring and the two static contacts, the state of the movable spring can be adjusted via the arc-shaped contact surface so that the movable spring and the static contact reach a contact equilibrium point, so as to avoid the movable spring and the static contact group being fixed at two higher contact positions, thereby ensuring that the multi-position contact function between the movable spring and the static contact is effective. Accordingly, the contact device provided by the present application can further optimize the structure itself, and even the performance of the relay, and is conducive to further improving the reliability of the relay. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] FIG1 is a schematic diagram showing the structure of a relay provided in an embodiment of the present application;

[0042] FIG2 is a schematic structural diagram of a portion of the structure in FIG1 ;

[0043] FIG3 is a schematic diagram showing the structure in FIG2 at another angle;

[0044] FIG4 shows a cross-sectional view of the section AA in FIG2 ;

[0045] FIG5 shows a cross-sectional view at BB in FIG3 ;

[0046] FIG6 is an exploded schematic diagram showing part of the structure in FIG2 ;

[0047] FIG7 is a schematic diagram showing the structure of a portion of the structure in FIG6 after assembly;

[0048] FIG8 shows another structural schematic diagram of a portion of the structure in FIG1 ;

[0049] FIG9 is a schematic diagram showing the structure in FIG8 at another angle;

[0050] FIG10 shows a cross-sectional view at CC in FIG8 ;

[0051] FIG11 shows a cross-sectional view at DD in FIG9 ;

[0052] FIG12 is an exploded schematic diagram showing part of the structure in FIG8 ;

[0053] FIG13 is a schematic diagram showing the structure of the assembled portion of the structure in FIG12;

[0054] FIG14 shows another structural schematic diagram of a contact device provided in an embodiment of the present application;

[0055] FIG15 is a schematic diagram showing the structure of FIG14 after assembly;

[0056] FIG16 shows a fourth structural schematic diagram of a contact device provided in an embodiment of the present application;

[0057] FIG17 is a schematic diagram showing the structure of FIG16 after assembly;

[0058] FIG18 shows a fifth structural schematic diagram of the contact device provided in an embodiment of the present application;

[0059] FIG19 is a schematic cross-sectional view of the structure after assembly in FIG18 ;

[0060] FIG20 shows a sixth structural schematic diagram of a contact device provided in an embodiment of the present application;

[0061] FIG21 is a schematic cross-sectional view of the structure of FIG20 after assembly;

[0062] FIG22 shows a seventh structural schematic diagram of the contact device provided in an embodiment of the present application;

[0063] FIG23 is a schematic diagram showing the structure of FIG22 after assembly;

[0064] FIG24 is a schematic diagram showing the structure of FIG22 after assembly at another angle;

[0065] FIG25 shows a cross-sectional view of the structure in FIG23;

[0066] FIG26 shows a cross-sectional view of the structure in FIG23 at another angle;

[0067] FIG27 is a schematic diagram showing the structure of a movable spring in a contact device provided in an embodiment of the present application.

[0068] The accompanying drawings are marked as follows: 100, outer shell; 110, first shell; 120, second shell; 130, exposure hole; 200, electromagnet unit; 210, coil frame; 220, coil; 300, arc extinguishing unit; 310, arc extinguishing magnet; 320, yoke clamp; 400, sealing unit; 10, static contact; 20, moving spring; 201, second recess; 202, second protrusion; 203, second pit; 204, contact portion; 30, elastic member; 40, rod; 50, base; 60, bracket; 61, bottom plate; 70, first magnetic conductive member; 701, first protrusion; 702, first pit; 703, first recess; 80, support member; 801, depression; 802, protrusion; 90, second magnetic conductive member; M, moving spring assembly. Specific embodiments

[0069] 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.

[0070] Figure 1 shows an exploded schematic diagram of a relay provided in an embodiment of the present application. The relay comprises a housing 100, an electromagnet unit 200, an arc extinguishing unit 300, and a sealing unit 400. The sealing unit 400 is disposed within the housing 100, with the top of the static contact 10 of the sealing unit 400 exposed to the outer surface of the housing 100 through an exposure hole 130 in the housing 100. Both the electromagnet unit 200 and the arc extinguishing unit 300 are disposed within the housing 100.

[0071] As an example, the housing 100 includes a first shell 110 and a second shell 120 , which are snap-connected to form a chamber for accommodating the electromagnet unit 200 , the arc extinguishing unit 300 and the sealing unit 400 .

[0072] The arc extinguishing unit 300 is used to extinguish the arc generated between the static contact and the movable spring of the sealing unit 400 .

[0073] As an example, the arc extinguishing unit 300 includes two arc extinguishing magnets 310. The arc extinguishing magnets 310 can be permanent magnets, and each arc extinguishing magnet 310 can be substantially rectangular. The two arc extinguishing magnets 310 are respectively disposed on either side of the insulating cover and are arranged opposite to each other along the length direction of the dynamic spring.

[0074] It should be noted that by providing two arc-extinguishing magnets 310 disposed opposite to each other, a magnetic field can be formed around the stationary contact and the movable spring. Therefore, the arc generated between the stationary contact and the movable spring is stretched away from each other by the magnetic field, thereby extinguishing the arc.

[0075] The arc extinguishing unit 300 also includes two yoke clamps 320, which are arranged corresponding to the positions of the two arc extinguishing magnets 310. In addition, the two yoke clamps 320 surround the sealing unit 400 and the two arc extinguishing magnets 310. The design of the yoke clamps 320 surrounding the arc extinguishing magnets 310 can prevent the magnetic field generated by the arc extinguishing magnets 310 from spreading outward and affecting the arc extinguishing effect. The yoke clamps 320 are made of soft magnetic material. Soft magnetic materials can include but are not limited to iron, cobalt, nickel, and alloys thereof.

[0076] The sealing unit 400 includes a contact device. The contact device can be any of the following technical solutions. Of course, the contact device can also be configured in other ways according to needs, which will not be described in detail here.

[0077] As shown in Figures 2 to 26, the contact device provided in the embodiment of the present application includes: a static contact group, a dynamic spring assembly M and an elastic member 30, wherein the static contact group includes two static contacts 10; the dynamic spring assembly M includes a dynamic spring 20, and the two ends of the dynamic spring 20 can move relative to the static contact group so that the two ends of the dynamic spring 20 contact or disengage from the static contact group. The elastic member 30 is placed on the side of the dynamic spring assembly M away from the static contact group. It should be understood that the elastic member 30 is used to provide contact pressure. The elastic member 30 can be a spring or a leaf spring. An arc-shaped contact surface is provided between the elastic member 30 and the dynamic spring assembly M. For example, the arc-shaped contact surface is illustrated by a thick black line in Figure 7. It should be understood that the arc-shaped contact surface in Figure 7 is only an exemplary illustration, and its specific size is not limited to that shown in Figure 7.

[0078] Because the specific configuration of the arcuate contact surface can vary, the phrase "between" in this embodiment, "an arcuate contact surface is provided between the elastic member 30 and the dynamic spring assembly M," means that the dynamic spring assembly M and the elastic member 30 are located on either side of the arcuate contact surface, and their relative position is adjusted by the arcuate contact surface. If the elastic member 30 is a spring, the arcuate contact surface may be partially located within the inner contour of the elastic member 30.

[0079] It is worth noting that a contact portion 204 is provided on the movable spring 20 or the stationary contact 10, and the contact portion 204 is used to form a contact position between the movable spring 20 and the stationary contact assembly. Accordingly, at least two contact positions are formed between the two stationary contacts 10 and the movable spring assembly M.

[0080] It should be noted that the contact device provided in the embodiment of the present application has an arc-shaped contact surface provided between the movable spring assembly M and the elastic member 30. If the movable spring 20 in the movable spring assembly M contacts the static contact assembly, adhesion occurs between the movable spring 20 and the static contact 10. As the relay switches from "on" to "off", the movable spring 20 can reverse and generate a shear force at the bonding location, thereby releasing the adhesion between the static contact 10 and the movable spring 20, thereby ensuring the performance of the contact device and even the relay, and improving the reliability of the relay.

[0081] It can be understood that when the relay is in the “on” state, the movable spring assembly M and the static contact 10 are closed; when the relay is in the “off” state, the movable spring assembly M and the static contact 10 are disconnected.

[0082] At the same time, the curved contact surface between the dynamic spring assembly M and the elastic member 30 allows the dynamic spring assembly M to flip. If the contact point between the dynamic spring 20 and the static contact 10 experiences ablation wear, uneven topography, or dimensional accuracy deviations, the dynamic spring assembly M can automatically flip.

[0083] For example, when there are two contact positions between the movable spring 20 and the two stationary contacts 10, the state of the movable spring 20 can be adjusted via the arcuate contact surface to ensure that the contact pressure at the two contact positions is the same. When there are more than two contact positions between the movable spring 20 and the two stationary contacts 10, the state of the movable spring 20 can be adjusted via the arcuate contact surface so that the movable spring 20 and the stationary contacts 10 reach a contact equilibrium point, thereby preventing the movable spring 20 and the stationary contacts 10 from being fixed at two higher contact positions, thereby ensuring that the multi-position contact function between the movable spring 20 and the stationary contacts 10 is effectively functioning.

[0084] Accordingly, the contact device provided in the embodiment of the present application can further optimize the structure itself and even the performance of the relay, and is conducive to further improving the reliability of the relay.

[0085] In one embodiment, as shown in Figures 4 and 5, the contact device provided in the embodiment of the present application further includes a contact bracket 60, and the movable spring assembly M is mounted on the contact bracket 60 via the elastic member 30. It is worth noting that after the movable spring 20 contacts the static contact 10, the contact bracket 60 continues to move a certain distance to further compress the elastic member 30, thereby providing contact pressure between the movable spring 20 and the static contact 10.

[0086] 4 and 5 , the contact device further includes a rod 40 and a base 50 , wherein one axial end of the rod 40 is fixed to the base 50 ; along the axial direction of the rod 40 , the contact bracket 60 is fixed to the side of the base 50 away from the rod 40 .

[0087] It is worth noting that, along the axial direction of the rod portion 40 , the elastic member 30 and the dynamic spring 20 are located on the same side of the base 50 away from the rod portion 40 .

[0088] It is understandable that the rod 40 reciprocates under the driving action of the electromagnet unit 200 , so that the movable spring 20 moves along with the rod 40 , thereby achieving contact and disengagement between the movable spring 20 and the static contact 10 .

[0089] It should be noted that if the movable spring assembly M contacts the static contact 10, the contact portion 204 on the movable spring assembly M and the static contact 10 will adhere to each other. When the rod 40 is released, the movable spring assembly M will be flipped over, generating a shear force on the bonding position to release the bonding state between the static contact 10 and the contact portion 204, thereby ensuring the performance of the contact device and even the relay.

[0090] As shown in FIG4 and FIG5 , in one embodiment, the contact support 60 includes a bottom plate 61 located on one side of the dynamic spring assembly M. The elastic member 30 is disposed between the bottom plate 61 and the dynamic spring assembly M to provide contact pressure.

[0091] It is understandable that when the contact support 60 includes a bottom plate 61 , the bottom plate 61 may be fixed in the base 50 so as to move synchronously with the base 50 when the rod 40 moves.

[0092] In a specific embodiment, for example, the contact bracket 60 includes a bottom plate 61, a top plate and two side plates arranged opposite to each other. Along the axial direction of the rod portion 40, the two side plates are located on the same side of the bottom plate 61; the top plate is connected to the other end of the two side plates facing away from the bottom plate 61 to form a frame structure with the bottom plate 61 and the two side plates; the elastic member 30 is located in the frame structure, and the dynamic spring 20 is placed in the frame structure and is located between the elastic member 30 and the top.

[0093] It is worth noting that the contact support 60 may also include only the bottom plate 61 and two side plates, and part of the structure within the dynamic spring assembly M may function as a top plate, forming a frame-shaped structure with the contact support 60. In this case, the dynamic spring 20 within the dynamic spring assembly M may be located outside the frame-shaped structure, and the details are not repeated here.

[0094] In one embodiment, only one arc-shaped contact surface is provided between the elastic member 30 and the dynamic spring assembly M; the orthographic projection of the arc-shaped contact surface on the dynamic spring assembly M is located in the middle of the dynamic spring assembly M.

[0095] It should be noted that the contact device provided in the embodiment of the present application has only a single arc-shaped contact surface between the movable spring assembly M and the elastic member 30. If the movable spring 20 in the movable spring assembly M contacts the stationary contact assembly, adhesion occurs between the movable spring 20 and the stationary contact 10. As the relay switches from "on" to "off," the movable spring 20 can reverse at multiple angles, generating shear force at the bonded position, thereby releasing the bond between the stationary contact 10 and the movable spring 20. This protects the performance of the contact device, and even the relay, and enhances the reliability of the relay.

[0096] At the same time, when the contact position between the movable spring 20 and the static contact 10 is ablated and worn, has an uneven topography, or has dimensional accuracy deviations, the movable spring assembly M can be automatically flipped at multiple angles.

[0097] When the dynamic spring assembly M is provided, the dynamic spring assembly M may be a single group or multiple groups. When multiple groups are provided, only one arc-shaped contact surface is provided between each group of dynamic spring assemblies M and the elastic member 30 to ensure that each group of dynamic spring assemblies M can be reversed at multiple angles, generating a shear force at the bonding position to release the bonding between the static contact 10 and the dynamic spring 20, thereby ensuring the performance of the contact device and even the relay, and improving the reliability of the relay.

[0098] At the same time, when the contact position between the dynamic spring 20 and the static contact 10 is ablated and worn, has an uneven topography, or has dimensional accuracy dispersion, the multiple groups of dynamic spring assemblies M can be automatically flipped at multiple angles.

[0099] In one embodiment, as shown in FIG7 , the line segment between any two points of the arcuate contact surface on the contour line of the orthographic projection of the dynamic spring assembly M is an arc. It should be understood that the contour line of the arcuate contact surface on the dynamic spring assembly M can be circular or elliptical, that is, the arcuate contact surface is designed to be 360 ​​degrees.

[0100] It should be noted that in this embodiment, if the movable spring 20 in the movable spring assembly M contacts the static contact group, adhesion occurs between the movable spring 20 and the static contact 10. As the relay switches from the "on" state to the "off" state, the movable spring 20 can be reversed at any angle, that is, 360 degrees, and during the flipping process of the movable spring assembly M, there is no flipping dead angle, which can better generate shear force on the bonding position to release the bonding state between the static contact 10 and the movable spring 20, thereby ensuring the performance of the contact device and even the relay, and improving the reliability of the relay.

[0101] At the same time, when the contact position between the movable spring 20 and the static contact 10 is ablated and worn, has an uneven topography, or has dimensional accuracy deviations, the movable spring assembly M can automatically flip at any angle, i.e., 360 degrees.

[0102] In one embodiment, as shown in FIG3 , a support member 80 is provided between the dynamic spring assembly M and the elastic member 30, and the arcuate contact surface is located between the support member 80 and the dynamic spring assembly M. It should be understood that the relative position between the dynamic spring assembly M and the elastic member 30 is adjusted via the support member 80. The specific structure of the support member 80 may vary.

[0103] In one embodiment, the arc-shaped contact surface in the embodiment of the present application is provided on the movable spring assembly M; when the movable spring 20 contacts the static contact 10, the arc-shaped contact surface is used to adjust the state of the movable spring 20 so that the movable spring 20 reaches a balance point in contact with the static contact group. In a specific embodiment, as shown in Figures 3 to 15, the movable spring assembly M in the embodiment of the present application includes both the movable spring 20 and the first magnetic conductive member 70. The first magnetic conductive member 70 is provided between the movable spring 20 and the elastic member 30, and the first magnetic conductive member 70 is fixed relative to the movable spring 20. It should be understood that the first magnetic conductive member 70 can play the role of the inner top plate of the contact bracket 60. In another specific embodiment, as shown in Figures 16 to 26, the movable spring assembly M only includes the movable spring 20.

[0104] In combination with the structure of the dynamic spring assembly M, when specifically setting the arcuate contact surface in the embodiment of the present application, there are many possibilities for the location and formation of the arcuate contact surface.

[0105] In the first embodiment, as shown in Figures 2 to 7 and 8 to 13, the dynamic spring assembly M is provided with an adjustment portion on the side facing the elastic member 30, and the adjustment portion is a convex portion convex toward the elastic member 30; the arc-shaped contact surface is located on the side surface of the convex portion facing the elastic member 30.

[0106] It is understood that, as shown in Figures 2 to 7 and 8 to 13, the dynamic spring assembly M in this embodiment includes a dynamic spring 20 and a first magnetic conductive member 70, and the adjustment portion is provided on the first magnetic conductive member 70. Specifically, in this first embodiment, the first magnetic conductive member 70 has a first protrusion 701, and the arc-shaped contact surface is located on the surface of the first protrusion 701 of the first magnetic conductive member 70.

[0107] In the first embodiment, the elastic member 30 is a spring, and a support member 80 is provided between the dynamic spring assembly M and the elastic member 30. The support member 80 is covered outside the outer ring contour of the elastic member 30, and a recess 801 is provided on at least a portion of the support member 80 where the orthographic projection of the dynamic spring assembly M is located and the inner ring contour of the elastic member 30 is within the orthographic projection of the dynamic spring assembly M. The recess 801 is sunken in a direction away from the dynamic spring assembly M; at least a portion of the first protrusion 701 is disposed in the recess 801; and the arc-shaped contact surface contacts the inner surface of the recess 801.

[0108] In this embodiment, the arcuate contact surface is specifically adjusted in position with the inner surface of the recess 801 of the support member 80. It should be understood that the shape of the recess 801 on the support member 80 fits the shape of the arcuate contact surface to ensure the multi-angle adjustment effect of the dynamic spring assembly M.

[0109] It is worth noting that in the first embodiment, the adjustment portion and the dynamic spring assembly M may be a separate structure, for example, as shown in Figures 4 to 7 ; or, the adjustment portion and the dynamic spring assembly M may be an integrated structure, for example, as shown in Figures 10 to 13 .

[0110] Specifically, when the adjustment portion and the dynamic spring assembly M are a split structure, the protrusion can be a hemispherical structure, and the plane of the hemispherical structure can be installed on the side of the dynamic spring assembly M facing the elastic member 30 to form a shape similar to the first protrusion 701 shown in Figures 10 to 13 located on the first magnetic conductive member 70.

[0111] Alternatively, the protrusion can be a sphere or an ellipsoid, with a recess provided on the surface of the dynamic spring assembly M, and then at least a portion of the protrusion positioned within the recess. It should be understood that the protrusion, which is a sphere or an ellipsoid, can be fixed within the recess or simply placed within the recess. For example, as shown in Figures 4 to 7 , the first magnetic conductive member 701 is provided with a first recess 702, at least a portion of the first protrusion 701 is fixed within the first recess 702, and at least the portion of the first protrusion 701 that protrudes from the first recess 702 is placed within the recess 801 of the support member 80, thereby achieving a multi-angle adjustment function.

[0112] It is worth noting that if the dynamic spring assembly M only includes the dynamic spring 20 , the relevant structural design of the first magnetic conductive member 70 in the first embodiment can be performed on the dynamic spring 20 , and the multi-angle adjustment function of the dynamic spring 20 can be realized in conjunction with the support member 80 .

[0113] In the second embodiment, as shown in Figures 14 and 15 , the movable spring assembly M is provided with an adjustment portion on the side facing the elastic member 30. The adjustment portion is a recessed portion, and the arcuate contact surface is located on the side of the recessed portion facing the elastic member 30. It will be appreciated that, as shown in Figures 14 and 15 , the movable spring assembly M in this embodiment includes the movable spring 20 and a first magnetic conductive member 70, and the adjustment portion is specifically provided on the first magnetic conductive member 70. Specifically, in this second embodiment, the first magnetic conductive member 70 has a first recessed portion 703.

[0114] In the second embodiment, the elastic member 30 is a spring, and a support member 80 is provided between the dynamic spring assembly M and the elastic member 30. The support member 80 is arranged to cover the outside of the outer ring contour of the elastic member 30, and a protrusion 802 is formed on at least the portion of the support member 80 where the orthographic projection of the dynamic spring assembly M is located and the inner ring contour of the elastic member 30 is located within the orthographic projection of the dynamic spring assembly M; the protrusion 802 protrudes toward the dynamic spring assembly M, and at least a portion of the protrusion 802 is located in the first recess 703 and contacts the inner surface of the first recess 703.

[0115] In this second embodiment, the arcuate contact surface is located on the surface of the first magnetic conductive member 70. This arcuate contact surface is specifically adjusted relative to the protrusion 802 of the support member 80. It should be understood that the shape of the protrusion 802 of the support member 80 should conform to the shape of the arcuate contact surface to ensure the multi-angle adjustment effect of the dynamic spring assembly M.

[0116] It is worth noting that if the dynamic spring assembly M only includes the dynamic spring 20, the relevant structural design of the first magnetic conductive member 70 in the second embodiment can be implemented on the dynamic spring 20 to cooperate with the support member 80 to achieve the multi-angle adjustment function of the dynamic spring 20. For example, as shown in Figures 16 and 17, the dynamic spring 20 is provided with a second recess 201, which cooperates with the protrusion 802 on the support member 80.

[0117] In a third embodiment, as shown in Figures 18-19 and 20-21 , the dynamic spring assembly M has an adjustment portion on the side facing the elastic member 30. The adjustment portion is a convex portion that projects toward the elastic member 30. The arcuate contact surface is located on the side of the convex portion that faces the elastic member 30. In this embodiment, the elastic member 30 is shown as a spring.

[0118] When the elastic member 30 is a spring, it can be configured that: at least a portion of the protrusion is located within the inner circle contour of the spring; and the arc-shaped contact surface contacts the inner circle contour of the spring.

[0119] It will be appreciated that in this embodiment, the dynamic spring assembly M includes only the dynamic spring 20, with the adjustment portion being specifically provided on the dynamic spring 20. Specifically, in this third embodiment, the dynamic spring 20 has a second protrusion 202, with the arcuate contact surface located on the surface of the second protrusion 202. This arcuate contact surface is specifically positioned relative to the inner contour of the spring to ensure multi-angle adjustment of the dynamic spring assembly M.

[0120] In the third embodiment, the adjustment portion and the dynamic spring assembly M may be a separate structure, as shown in Figures 20 and 21; or, the adjustment portion and the dynamic spring assembly M may be an integrated structure, as shown in Figures 18 and 19.

[0121] Specifically, when the adjustment portion and the dynamic spring assembly M are separate structures, the convex portion can be a hemispherical structure, and the flat surface of the hemispherical structure can be installed on the side of the dynamic spring assembly M facing the elastic member 30, so as to form a configuration similar to that shown in Figures 18 and 19 where the second convex portion 202 is located on the dynamic spring 20. Of course, the flat surface of the hemispherical structure can also be provided with a protruding structure or a recessed structure, and the dynamic spring assembly M can be provided with a recessed structure and a protruding structure that adapt to the flat surface of the hemispherical structure, so as to facilitate the installation of the hemispherical structure on the side of the dynamic spring assembly M facing the elastic member 30.

[0122] In addition, it is worth noting that the convex portion can also be formed by a fixing plate, and the fixing plate is fixed on the dynamic spring assembly M. Specifically, the fixing plate can include a sheet-like body and a convex portion protruding from the sheet-like body.

[0123] Alternatively, the protrusion can be a sphere or ellipsoid, with a recess provided on the surface of the dynamic spring assembly M, and at least a portion of the protrusion then positioned within the recess. It should be understood that the protrusion, which is a sphere or ellipsoid, can be fixed within the recess or simply positioned within the recess. For example, as shown in Figures 20 and 21 , the dynamic spring 20 is provided with a second recess 203, with at least a portion of the second protrusion 202 positioned within the second recess 203. At least the portion of the second protrusion 202 that protrudes beyond the second recess 203 is positioned within the recess 801 of the support member 80, thereby achieving a multi-angle adjustment function.

[0124] It is worth noting that if the dynamic spring assembly M includes the dynamic spring 20 and the first magnetic conductive member 70 , the relevant structural design of the dynamic spring 20 in the third embodiment can be performed on the first magnetic conductive member 70 to achieve the multi-angle adjustment function of the dynamic spring 20 .

[0125] It should be understood that the elastic member 30 in the third embodiment is illustrated as a spring. Of course, the elastic member 30 can also be a leaf spring, and the arc-shaped contact surface contacts the surface of the leaf spring facing the dynamic spring assembly M.

[0126] Furthermore, it is worth noting that, in addition to the structural arrangements described in the first through third embodiments, a simple adjustment portion can also be provided on the dynamic spring assembly M, with the adjustment portion being a recessed portion. In this case, without using the support member 80, the position of the dynamic spring assembly M relative to the elastic member 30 can be adjusted solely by the recessed portion. The details will not be further described.

[0127] In one embodiment, as shown in FIG3 to FIG7, the contact device further includes a second magnetic conductive member 90, which is located on the side of the dynamic spring 20 away from the elastic member 30 to form a short-circuit ring around the dynamic spring assembly M.

[0128] It should be noted that the structural setting in the embodiment of the present application can enhance the suction force of the short-circuit ring, thereby achieving a good effect of increasing resistance to short-circuit current.

[0129] It is worth noting that there is no limit to the structural form of the short-circuit ring, and the anti-short-circuit function does not distinguish between fixed upper iron and movable upper iron, and can be set according to specific needs.

[0130] In one embodiment, as shown in FIG7 , when the elastic member 30 is a spring, at least a portion of the orthographic projection of the arcuate contact surface on the dynamic spring assembly M is located within the orthographic projection of the inner contour of the elastic member 30 on the dynamic spring assembly M. It should be understood that a spring has an inner diameter and an outer diameter. In this embodiment, the inner contour of the elastic member 30 forms the inner diameter of the spring, and the outer contour of the elastic member 30 forms the outer diameter of the spring.

[0131] It should be noted that in the embodiment of the present application, at least a portion of the arcuate contact surface in the orthographic projection of the dynamic spring assembly M is located within the orthographic projection of the elastic member 30 on the dynamic spring assembly M. This structural arrangement improves the self-adjustment effect of the dynamic spring assembly M and eliminates the need to provide an assembly groove for the elastic member 30 on the dynamic spring assembly M, thereby simplifying the assembly of the elastic member 30.

[0132] In order to further improve the self-adjusting effect of the dynamic spring assembly M, it can also be arranged that at least a part of the arc-shaped contact surface in the middle of the orthographic projection of the dynamic spring assembly M is located inside the orthographic projection of the dynamic spring assembly M, and the inner ring contour of the elastic member 30 is located inside the orthographic projection of the dynamic spring assembly M.

[0133] In one embodiment, when the elastic member 30 is a spring, the end surface of the elastic member 30 that contacts the dynamic spring assembly M is ground, i.e., the surface of the elastic member 30 is ground flat. Alternatively, the end surface of the elastic member 30 that contacts the dynamic spring assembly M is the original wire diameter surface, i.e., the surface of the elastic member 30 is not ground flat.

[0134] It should be noted that the embodiment of the present application adds an arc-shaped contact surface between the dynamic spring assembly M and the elastic member 30. The arc-shaped contact surface can play an adjustment effect when the surface of the elastic member 30 is a polished surface or an original wire diameter surface, so that the dynamic spring assembly M can be flipped, and there is no flipping dead angle during the flipping process of the dynamic spring assembly M, thereby optimizing the performance of the contact device and even the relay.

[0135] In one embodiment, as shown in Figures 22 to 28, both ends of the movable spring 20 can move relative to the static contact group to form two contact areas; at least one of the static contact 10 and the movable spring 20 in each contact area has a contact portion 204; the number of contact portions 204 in the two contact areas is at least three, and each contact portion 204 is used to achieve contact and disengagement between the movable spring 20 and the static contact 10.

[0136] It should be noted that each contact portion 204 can form a contact position between the movable spring 20 and the stationary contact assembly. Accordingly, at least three contact portions 204 can form three contact positions between the movable spring 20 and the stationary contact assembly, ensuring the probability of multi-position contact between the two and improving product reliability. Furthermore, more contact portions 204 can further reduce contact resistance and electrokinetic repulsion, resulting in lower relay heat generation and higher reliability.

[0137] It is worth noting that, under the same contact pressure, the multi-position contact can reduce the total contact resistance in the relay because the parallel contact resistance is smaller than the contact resistance of a single contact portion 204. As a result, the relay generates less heat and has higher reliability.

[0138] In addition, it can be understood that the electromotive repulsion is proportional to the square of the current flowing through it. The electromotive repulsion at multiple points reduces the total electromotive repulsion, which is beneficial to improving the product's ability to resist short circuits and enhances the reliability of the relay.

[0139] It should be understood that the contact portion 204 can be provided on the movable spring 20 or the stationary contact 10 to achieve multi-position contact between the movable spring 20 and the stationary contact group.

[0140] In a specific embodiment, as shown in Figures 22 to 28, the dynamic spring assembly M is provided with at least three contact portions 204; the at least three contact portions 204 correspond to two static contacts 10, and each contact portion 204 is used to contact its corresponding static contact 10 to form a contact position.

[0141] Of course, the number of contact portions 204 on the movable spring assembly M can be other or arranged in other forms. As shown in FIG27 , for example, four contact portions 204 are formed on the movable spring 20 using a horizontal and vertical line contact method to achieve a contact form between the movable spring 20 and the two stationary contacts 10 at more than two contact positions. Each contact portion 204 can form a single contact position with the stationary contact 10.

[0142] It is worth noting that, as shown in Figures 22 to 26, the contact portion 204 of the relay's movable spring 20 and stationary contact 10 may develop an uneven surface due to erosion caused by power on and off. When the uneven surfaces of the contact portion 204 come into contact, if the two contact positions are at a higher level at the moment of contact, the additional curved contact surface between the movable spring 20 and the elastic member 30 can shift the contact position between the movable spring 20 and the two stationary contacts 10 from two to more than two, for example, three, thereby improving product reliability and further reducing contact resistance and electrodynamic repulsion.

[0143] In addition, it is worth noting that the static contact 10 can be shaped to match the contact portion 204 on the movable spring 20 to better achieve multi-position contact between the movable spring 20 and the static contact 10 .

[0144] Finally, it should be noted that: 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.

[0145] 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.

[0146] 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.

[0147] 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.

[0148] 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 contact device, characterized in that, include: A stationary contact group, wherein the stationary contact group comprises two stationary contacts; A movable spring assembly, the movable spring assembly comprising a movable spring, both ends of which can move relative to the stationary contact group so that the two ends of the movable spring contact or disengage from the stationary contact group; An elastic member is disposed on a side of the movable spring assembly away from the static contact group; an arc-shaped contact surface is provided between the elastic member and the movable spring assembly.

2. The contacting device according to claim 1, characterized in that, Only one arc-shaped contact surface is provided between the elastic member and the dynamic spring assembly; the orthographic projection of the arc-shaped contact surface on the dynamic spring assembly is located in the middle of the dynamic spring assembly.

3. The contacting device according to claim 2, characterized in that, There are multiple groups of the dynamic spring assemblies, and only one arc-shaped contact surface is provided between each group of the dynamic spring assemblies and the elastic member.

4. The contacting device according to any one of claims 1-3, characterized in that, The line segment between any two points on the contour line of the positive projection of the dynamic spring assembly on the arc-shaped contact surface is an arc.

5. The contacting device according to any one of claims 1-3, characterized in that, A support member is provided between the dynamic spring assembly and the elastic member, and the arc-shaped contact surface is located between the support member and the dynamic spring assembly.

6. The contacting device according to claim 1, characterized in that The arc-shaped contact surface is arranged on the movable spring assembly; when the movable spring contacts the stationary contact, the arc-shaped contact surface is used to adjust the state of the movable spring so that the movable spring reaches a balance point in contact with the stationary contact assembly.

7. The contacting device according to claim 6, characterized in that, The movable spring assembly is provided with an adjustment portion on one side facing the elastic member, and the adjustment portion is a convex portion convex toward the elastic member; the arc-shaped contact surface is located on a surface of the convex portion facing the elastic member.

8. The contacting device according to claim 7, characterized in that, The convex portion and the dynamic spring assembly are an integrated structure.

9. The contacting device according to claim 7, characterized in that The convex portion and the dynamic spring assembly are split structures.

10. The contacting device according to claim 9, characterized in that, The convex portion is a hemispherical structure, and the flat side of the convex portion is installed on the side of the dynamic spring assembly facing the elastic member; Alternatively, the convex portion is a sphere or an ellipsoid; a concave pit is provided on a side of the dynamic spring assembly facing the elastic member, and at least a portion of the convex portion is located in the concave pit.

11. The contacting device according to any one of claims 7-10, characterized in that, The elastic member is a spring; at least a portion of the convex portion is located within the inner circle contour of the elastic member; and the arc-shaped contact surface contacts the inner circle contour of the elastic member.

12. The contacting device according to any one of claims 7-10, characterized in that, The elastic member is a leaf spring; the arc-shaped contact surface contacts a side surface of the leaf spring facing the dynamic spring assembly.

13. The contacting device according to any one of claims 7-10, characterized in that, The elastic member is a spring; a support member is provided between the dynamic spring assembly and the elastic member, the support member is provided outside the outer circle contour of the elastic member, and the support member is provided with a recess at least in a portion where the positive projection of the dynamic spring assembly is located within the positive projection of the dynamic spring assembly and the inner circle contour of the elastic member, and the recess sinks in a direction away from the dynamic spring assembly; At least a portion of the convex portion is disposed in the concave portion; and the arc-shaped contact surface contacts an inner surface of the concave portion.

14. The contacting device according to claim 6, characterized in that, The movable spring assembly is provided with an adjustment portion on one side facing the elastic member, and the adjustment portion is a concave portion; the arc-shaped contact surface is located on a surface of the concave portion facing the elastic member.

15. The contacting device according to claim 14, characterized in that, The elastic member is a spring; a support member is provided between the dynamic spring assembly and the elastic member, the support member is covered outside the outer ring contour of the elastic member, and the support member forms a bulge in at least a portion of the inner ring contour of the elastic member within the orthographic projection of the dynamic spring assembly where the orthographic projection of the dynamic spring assembly is located; the bulge bulges toward the dynamic spring assembly, and at least a portion of the bulge is placed in the recess and contacts the arc-shaped contact surface.

16. The contacting device according to any one of claims 1-3, characterized in that, The arc-shaped contact surface is arranged on the dynamic spring.

17. The contacting device according to any one of claims 1-3, characterized in that, The movable spring assembly further includes a first magnetic conductive member, which is disposed between the movable spring and the elastic member. The first magnetic conductive member is fixed relative to the movable spring, and the arc-shaped contact surface is disposed on the first magnetic conductive member.

18. The contacting device according to claim 17, characterized in that, The contact device further comprises a second magnetic conductive member, which is located on a side of the movable spring away from the elastic member to form a short-circuit ring around the movable spring assembly.

19. The contacting device according to any one of claims 1-3, characterized in that, The elastic member is a spring; at least part of the arc-shaped contact surface on the orthographic projection of the dynamic spring assembly is located such that the inner circle contour of the elastic member is inside the orthographic projection of the dynamic spring assembly.

20. The contacting device according to claim 19, characterized in that, At least a portion of the arc-shaped contact surface in the middle of the orthographic projection of the dynamic spring assembly is located such that the inner circle contour of the elastic member is inside the orthographic projection of the dynamic spring assembly.

21. The contacting device according to claim 19, characterized in that, The end surface of one side of the elastic member that is in contact with the dynamic spring assembly is a ground surface; Alternatively, the end surface of the elastic member on one side in contact with the dynamic spring assembly is the original wire diameter surface.

22. The contacting device according to any one of claims 1-3, characterized in that, The two ends of the movable spring can move relative to the static contact group to form two contact areas; the static contact and at least one of the movable springs in each of the contact areas have a contact portion; the number of the contact portions in the two contact areas is at least three, and each of the contact portions is used to achieve contact and disengagement between the movable spring and the static contact.

23. The contact device according to any one of claims 1-3, characterized in that, It also includes a contact bracket, and the dynamic spring assembly is installed on the contact bracket through the elastic member.

24. A relay, characterized in that, Comprising a contact device as described in any one of claims 1-23.

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