Contact device and relay

Abstract

The invention relates to the technical field of electronic control devices, in particular to a contact device and a relay. The contact device comprises: a static contact group, wherein the static contact group comprises two static contacts; the movable spring assembly comprises a movable spring, and the two ends of the movable spring can move relative to the static contact group, so that the two ends of the movable spring are in contact with or separated from the static contact group; the elastic piece is arranged on one side, deviating from the static contact group, of the movable spring assembly; and an arc-shaped contact surface is arranged between the elastic piece and the movable spring assembly. The contact device can realize the self-adjustment of the movable spring in the movable spring assembly at any position, so that the movable spring and the static contact reach a contact balance point, the effective use of the relay is ensured, and the performance of the relay is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of electronic control devices, and in particular to a contact device and a relay. Background Art

[0002] 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 usually used in automatic control circuits. A relay is actually an "automatic switch" that uses a smaller current to control a larger current. Therefore, it plays the role of automatic regulation, safety protection, and circuit conversion in the circuit.

[0003] High-voltage DC relay is a type of relay. Most existing high-voltage DC relays adopt a spring-actuated structure, that is, they use two static contacts and a spring to cooperate. According to the actual application of the vehicle, on the one hand, the contacts need to be disconnected under load to realize the "switch" function. During the use of the relay, the contacts will be welded and bonded, and at this time, the relay loses the "off" function.

[0004] Alternatively, the contact state between the static contact and the moving spring of the relay will produce an uneven morphology on the surface of the contact part due to the burning caused by power on and off. If there were originally two-point contact, the contact pressure on both sides would be inconsistent. If there were originally more than two points of multi-point contact, if there were two high-point contacts at the moment of contact, the contact state between the elastic part and the moving spring would form a plane support, and the moving spring would not be able to rotate. As a result, the static contact and the moving spring would always maintain a state of two high-point contact, and the original multi-point contact shape would lose its function, and the performance of the relay would be affected and could not be used normally. Summary of the invention

[0005] The embodiments of the present application provide a contact device and a relay, wherein the contact device can realize self-adjustment of a moving spring in a moving spring assembly at any position, so that the moving spring and the static contact reach a contact equilibrium point, thereby ensuring effective use of the relay and improving the performance of the relay.

[0006] The present application provides a contact device, including:

[0007] A stationary contact group, wherein the stationary contact group comprises two stationary contacts;

[0008] 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;

[0009] 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.

[0010] According to some embodiments of the invention, there is only one such arc-shaped contact surface between the elastic member and the moving contact assembly; the orthographic projection of the arc-shaped contact surface on the moving contact assembly is located in the middle of the moving contact assembly.

[0011] According to some embodiments of the invention, there are multiple sets of the moving contact assemblies, and there is only one such arc-shaped contact surface between each set of the moving contact assemblies and the elastic member.

[0012] According to some embodiments of the invention, the line segment between any two points on the contour line of the orthographic projection of the arc-shaped contact surface on the moving contact assembly is an arc.

[0013] According to some embodiments of the invention, a support member is provided between the moving contact assembly and the elastic member, and the arc-shaped contact surface is located between the support member and the moving contact assembly.

[0014] According to some embodiments of the invention, the arc-shaped contact surface is provided on the moving contact assembly; when the moving contact contacts the static contact, the arc-shaped contact surface is used to adjust the state of the moving contact so that the moving contact reaches the balance point of contacting the static contact group.

[0015] According to some embodiments of the invention, an adjustment portion is provided on the side of the moving contact assembly facing the elastic member, and the adjustment portion is a convex portion protruding towards the elastic member; the arc-shaped contact surface is located on the surface of the convex portion facing the elastic member.

[0016] According to some embodiments of the invention, the convex portion and the moving contact assembly are of an integral structure.

[0017] According to some embodiments of the invention, the convex portion and the moving contact assembly are of a split structure.

[0018] According to some embodiments of the invention, the convex portion is of a hemispherical structure, and the planar side of the convex portion is mounted on the side of the moving contact assembly facing the elastic member;

[0019] Alternatively, the convex portion is a sphere or an ellipsoid; a concave pit is provided on the side of the moving contact assembly facing the elastic member, and at least part of the convex portion is located in the concave pit.

[0020] According to some embodiments of the invention, the elastic member is a spring; at least part of the convex portion is located within the inner contour of the elastic member; the arc-shaped contact surface contacts the inner contour of the elastic member.

[0021] According to some embodiments of the invention, the elastic member is a leaf spring; the arc-shaped contact surface contacts the surface of the leaf spring facing the moving contact assembly.

[0022] According to some embodiments of the invention, the elastic member is a spring; a support member is provided between the moving spring assembly and the elastic member, the support member covers the outer contour of the elastic member, and at least a part of the orthographic projection of the support member on the moving spring assembly, which is located within the orthographic projection of the inner contour of the elastic member on the moving spring assembly, is provided with a depression that sinks in a direction away from the moving spring assembly.

[0023] At least a part of the convex portion is placed in the depression; the arc-shaped contact surface contacts the inner surface of the depression.

[0024] According to some embodiments of the invention, an adjustment portion is provided on one side of the moving spring assembly facing the elastic member, and the adjustment portion is a concave portion; the arc-shaped contact surface is located on one side surface of the concave portion facing the elastic member.

[0025] According to some embodiments of the invention, the elastic member is a spring; a support member is provided between the moving spring assembly and the elastic member, the support member covers the outer contour of the elastic member, and at least a part of the orthographic projection of the support member on the moving spring assembly, which is located within the orthographic projection of the inner contour of the elastic member on the moving spring assembly, forms a protrusion; the protrusion protrudes towards the moving spring assembly, and at least a part of the protrusion is placed in the concave portion and contacts the arc-shaped contact surface.

[0026] According to some embodiments of the invention, the arc-shaped contact surface is provided on the moving spring.

[0027] According to some embodiments of the invention, the moving spring assembly further includes a first magnetic conductive member, the first magnetic conductive member is provided between the moving spring and the elastic member, the first magnetic conductive member is fixed relative to the moving spring, and the arc-shaped contact surface is provided on the first magnetic conductive member.

[0028] According to some embodiments of the invention, the contact device further includes a second magnetic conductive member, the second magnetic conductive member is located on one side of the moving spring away from the elastic member to form a short-circuit ring on the periphery of the moving spring assembly.

[0029] According to some embodiments of the invention, the elastic member is a spring; at least a part of the orthographic projection of the arc-shaped contact surface on the moving spring assembly is located inside the orthographic projection of the inner contour of the elastic member on the moving spring assembly.

[0030] According to some embodiments of the invention, at least a part of the middle part of the orthographic projection of the arc-shaped contact surface on the moving spring assembly is located inside the orthographic projection of the inner contour of the elastic member on the moving spring assembly.

[0031] According to some embodiments of the invention, the end face of the elastic member for contacting the moving spring assembly is a grinding surface.

[0032] Alternatively, the end surface of the elastic member on one side in contact with the dynamic spring assembly is the original wire diameter surface.

[0033] According to some embodiments of the invention, both 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.

[0034] According to some embodiments of the present invention, a contact bracket is further included, and the dynamic spring assembly is installed on the contact bracket through the elastic member.

[0035] The present invention also provides a relay, comprising a contact device provided by any of the above technical solutions.

[0036] An embodiment of the above invention has at least the following advantages or beneficial effects:

[0037] The contact device provided by the present application is provided with an arc-shaped contact surface between the movable spring assembly and the elastic member. If the movable spring in the movable spring assembly contacts the static contact group, the movable spring and the static contact will be bonded. As the relay switches from the "on" state to the "off" state, the movable spring can be reversed to generate a shear force on the bonding position to release the bonding state between the static contact and the movable spring, thereby ensuring the performance of the contact device and even the relay, and improving the reliability of the relay.

[0038] 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 morphology is produced, or the dimensional accuracy is scattered, 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 through 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 through 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, and ensure that the multi-position contact function between the movable spring and the static contact is effectively played. 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

[0039] Figure 1 What is shown is a schematic diagram of the structure of a relay provided in an embodiment of the present application;

[0040] Figure 2 It is shown that Figure 1Schematic diagram of the partial structure in [object];

[0041] Figure 3 Shown is Figure 2 Schematic diagram of the structure in [object] from another angle;

[0042] Figure 4 Shown is Figure 2 Cross-sectional view of [object] at A-A;

[0043] Figure 5 Shown is Figure 3 Cross-sectional view of [object] at B-B;

[0044] Figure 6 Shown is Figure 2 Exploded schematic diagram of the partial structure in [object];

[0045] Figure 7 Shown is Figure 6 Schematic diagram of the assembled partial structure in [object];

[0046] Figure 8 Shown is Figure 1 Another schematic diagram of the partial structure in [object];

[0047] Figure 9 Shown is Figure 8 Schematic diagram of the structure in [object] from another angle;

[0048] Figure 10 Shown is Figure 8 Cross-sectional view of [object] at C-C;

[0049] Figure 11 Shown is Figure 9 Cross-sectional view of [object] at D-D;

[0050] Figure 12 Shown is Figure 8 Exploded schematic diagram of the partial structure in [object];

[0051] Figure 13 Shown is Figure 12 Schematic diagram of the assembled partial structure in [object];

[0052] Figure 14 Shown is another schematic diagram of the contact device provided by the embodiment of the present application;

[0053] Figure 15 Shown is Figure 14 Schematic diagram of the assembled structure in [object];

[0054] Figure 16 Shown is the fourth schematic diagram of the contact device provided by the embodiment of the present application;

[0055] Figure 17Shown is Figure 16 The structural schematic diagram after the structure in Figure 16 is assembled;

[0056] Figure 18 Shown is the fifth structural schematic diagram of the contact device provided by the embodiment of the present application;

[0057] Figure 19 Shown is Figure 18 The sectional structural schematic diagram after the structure in Figure 18 is assembled;

[0058] Figure 20 Shown is the sixth structural schematic diagram of the contact device provided by the embodiment of the present application;

[0059] Figure 21 Shown is Figure 20 The sectional structural schematic diagram after the structure in Figure 20 is assembled;

[0060] Figure 22 Shown is the seventh structural schematic diagram of the contact device provided by the embodiment of the present application;

[0061] Figure 23 Shown is Figure 22 The structural schematic diagram after the structure in Figure 22 is assembled;

[0062] Figure 24 Shown is Figure 22 The structural schematic diagram of the structure in Figure 22 after assembly from another angle;

[0063] Figure 25 Shown is Figure 23 The sectional view of the structure in Figure 23 ;

[0064] Figure 26 Shown is Figure 23 The sectional view of the structure in Figure 23 from another angle;

[0065] Figure 27 Shown is the structural schematic diagram of the moving contact of the contact device provided by the embodiment of the present application.

[0066] The description of the reference numerals is as follows:

[0067] 100. Outer shell; 110. First housing; 120. Second housing; 130. Exposed hole; 200. Electromagnet unit; 210. Coil bobbin; 220. Coil; 300. Arc extinguishing unit; 310. Arc extinguishing magnet; 320. Yoke iron clamp; 400. Sealing unit; 10. Stationary contact; 20. Moving spring; 201. Second recess; 202. Second protrusion; 203. Second pit; 204. Contact part; 30. Elastic member; 40. Rod part; 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. Detailed implementation manners

[0068] Example embodiments will now be described more fully with reference to the accompanying drawings. However, the example embodiments can be implemented in various forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this application will be thorough and complete, and will fully convey the concept of the example embodiments to those skilled in the art. Like reference numerals in the figures denote like or similar structures, and thus their detailed description will be omitted.

[0069] Figure 1 The exploded schematic view of the relay provided by the embodiment of the present invention is shown. The relay includes an outer shell 100, an electromagnet unit 200, an arc extinguishing unit 300, and a sealing unit 400. The sealing unit 400 is disposed inside the outer shell 100, and the top of the stationary contact 10 of the sealing unit 400 is exposed on the outer surface of the outer shell 100 through the exposed hole 130 of the outer shell 100. Both the electromagnet unit 200 and the arc extinguishing unit 300 are disposed inside the outer shell 100.

[0070] As an example, the outer shell 100 includes a first housing 110 and a second housing 120, and the first housing 110 and the second housing 120 are snap-fitted to form a chamber for accommodating the electromagnet unit 200, the arc extinguishing unit 300, and the sealing unit 400.

[0071] The arc extinguishing unit 300 is used to extinguish the arc generated between the stationary contact and the moving spring of the sealing unit 400.

[0072] 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 generally rectangular parallelepiped-shaped. The two arc extinguishing magnets 310 are respectively disposed on both sides of the insulating cover and are oppositely disposed along the length direction of the moving spring.

[0073] 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 will be elongated in a direction away from each other by the action of the magnetic field, thereby achieving arc extinguishing.

[0074] The arc extinguishing unit 300 also includes two yoke iron clips 320, and the two yoke iron clips 320 are arranged corresponding to the positions of the two arc extinguishing magnets 310. In addition, the two yoke iron clips 320 surround the sealing unit 400 and the two arc extinguishing magnets 310. By designing that the yoke iron clips 320 surround the arc extinguishing magnets 310, it is possible to prevent the magnetic field generated by the arc extinguishing magnets 310 from spreading outward and affecting the arc extinguishing effect. The yoke iron clips 320 are made of soft magnetic material. Soft magnetic materials may include but are not limited to iron, cobalt, nickel, and alloys thereof.

[0075] The sealing unit 400 includes a contact device. The contact device may be a contact device in any of the following technical solutions. Of course, the contact device may also be configured in other ways as required, which will not be described in detail here.

[0076] like Figures 2 to 26 As shown, the contact device provided by the embodiment of the present invention includes: a static contact group, a movable spring assembly M and an elastic member 30, wherein the static contact group includes two static contacts 10; the movable spring assembly M includes a movable spring 20, and both ends of the movable spring 20 can move relative to the static contact group so that the two ends of the movable spring 20 contact or disengage from the static contact group. The elastic member 30 is placed on the side of the movable 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 movable spring assembly M. For example, Figure 7 The arc-shaped contact surface is exemplified by the thick black line. It should be understood that Figure 7 The arc-shaped contact surface is only an example, and its specific size is not limited to Figure 7 shown.

[0077] Since there are many possible specific configurations of the arcuate contact surface, the “between” in “arc-shaped contact surface is provided between the elastic member 30 and the dynamic spring assembly M” in this embodiment means that the dynamic spring assembly M and the elastic member 30 are located on both sides of the arcuate contact surface, and the two adjust their relative positions through the arcuate contact surface. When the elastic member 30 is a spring, the arcuate contact surface may be partially located in the inner circle contour of the elastic member 30 in space.

[0078] 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.

[0079] It should be noted that the contact device provided by the embodiment of the present invention is provided with an 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 static contact group, the movable spring 20 and the static contact 10 are bonded, and as the relay switches from the "on" state to the "off" state, the movable spring 20 can be reversed to generate a 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.

[0080] 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.

[0081] At the same time, since an arc-shaped contact surface is provided between the movable spring assembly M and the elastic member 30, the movable spring assembly M can be turned over. When the contact position between the movable spring 20 and the static contact 10 is ablated and worn, has an uneven topography, or has a dispersion of dimensional accuracy, the movable spring assembly M can be automatically turned over.

[0082] 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 through the arc-shaped contact surface to ensure that the contact pressures at the two contact positions are 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 through the arc-shaped contact surface so that the movable spring 20 and the stationary contacts 10 reach a contact equilibrium point, so as to avoid the movable spring 20 and the stationary contacts 10 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 exerted.

[0083] 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.

[0084] In one embodiment, Figure 4 and Figure 5 As shown, 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 through the elastic member 30. It is worth noting that after the movable spring 20 contacts the stationary contact 10, the contact bracket 60 will continue to move a certain distance to further compress the elastic member 30, thereby providing contact pressure for the movable spring 20 and the stationary contact 10.

[0085] Please continue to refer to Figure 4 and Figure 5 In the structure shown, the contact device further comprises 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 , a contact support 60 is fixed to a side of the base 50 away from the rod 40 .

[0086] 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 .

[0087] It can be understood that the rod 40 reciprocates under the driving action of the electromagnet unit 200 , so that the movable spring 20 moves with the rod 40 , thereby achieving contact and separation between the movable spring 20 and the stationary contact 10 .

[0088] It should be noted that if the movable spring assembly M contacts the stationary contact 10, the contact portion 204 on the movable spring assembly M and the stationary contact 10 will adhere to each other. When the rod portion 40 is released, the movable spring assembly M will be flipped over to generate a shear force on the bonding position to release the bonding state between the stationary contact 10 and the contact portion 204, so as to ensure the performance of the contact device or even the relay.

[0089] like Figure 4 and Figure 5 As shown, in one embodiment, the contact support 60 includes a bottom plate 61, the bottom plate 61 is located on one side of the dynamic spring assembly M, and the elastic member 30 is placed between the bottom plate 61 and the dynamic spring assembly M to provide contact pressure.

[0090] 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.

[0091] In a specific embodiment, exemplarily, the contact bracket 60 includes a bottom plate 61, a top plate and two side plates arranged opposite to each other, and 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 between the elastic member 30 and the top.

[0092] 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 in the dynamic spring assembly M may play the role of the top plate and form a frame structure with the contact support 60. In this case, the dynamic spring 20 in the dynamic spring assembly M may be located outside the frame structure, and the details are not repeated.

[0093] In one embodiment, only one arc-shaped contact surface is provided between the elastic member 30 and the dynamic spring assembly M; the positive projection of the arc-shaped contact surface on the dynamic spring assembly M is located in the middle of the dynamic spring assembly M.

[0094] It should be noted that only one arc-shaped contact surface is provided between the moving contact spring assembly M and the elastic member 30 in the contact device provided by the embodiment of the present invention. If adhesion occurs between the moving contact spring 20 in the moving contact spring assembly M and the static contact group when the moving contact spring 20 contacts the static contact group, as the relay switches from the "open" state to the "closed" state, the moving contact spring 20 can perform reverse flipping at multiple angles, generating a shearing force on the adhesion position to release the adhesion state between the static contact 10 and the moving contact spring 20, ensuring the performance of the contact device and even the relay, and improving the reliability of the relay.

[0095] Meanwhile, when ablation wear occurs at the contact position between the moving contact spring 20 and the static contact 10, an uneven topography is generated, or there are dimensional accuracy dispersions, etc., the moving contact spring assembly M can achieve automatic flipping at multiple angles.

[0096] When setting the moving contact spring assembly M, the moving contact spring assembly M can be single-group or multi-group. When the moving contact spring assembly M is multi-group, only one arc-shaped contact surface is provided between each moving contact spring assembly M and the elastic member 30, so as to ensure that each moving contact spring assembly M can perform reverse flipping at multiple angles, generating a shearing force on the adhesion position to release the adhesion state between the static contact 10 and the moving contact spring 20, ensuring the performance of the contact device and even the relay, and improving the reliability of the relay.

[0097] Meanwhile, when ablation wear occurs at the contact position between the moving contact spring 20 and the static contact 10, an uneven topography is generated, or there are dimensional accuracy dispersions, etc., the multi-group moving contact spring assemblies M can achieve automatic flipping at multiple angles.

[0098] In one embodiment, as Figure 7 shown, the line segment between any two points on the contour line of the orthographic projection of the arc-shaped contact surface on the moving contact spring assembly M is an arc. It should be understood that the contour line of the arc-shaped contact surface on the moving contact spring assembly M can be circular or elliptical, that is, the arc-shaped contact surface is designed for 360 degrees.

[0099] It should be noted that in this embodiment, if adhesion occurs between the moving contact spring 20 in the moving contact spring assembly M and the static contact group when the moving contact spring 20 contacts the static contact group, as the relay switches from the "open" state to the "closed" state, the moving contact spring 20 can perform reverse flipping at any angle, that is, 360 degrees, and there is no flipping dead angle during the flipping process of the moving contact spring assembly M, which can better generate a shearing force on the adhesion position to release the adhesion state between the static contact 10 and the moving contact spring 20, ensuring the performance of the contact device and even the relay, and improving the reliability of the relay.

[0100] Meanwhile, when ablation wear occurs at the contact position between the moving contact spring 20 and the static contact 10, an uneven topography is generated, or there are dimensional accuracy dispersions, etc., the moving contact spring assembly M can achieve automatic flipping at any angle, that is, 360 degrees.

[0101] In one embodiment, asFigure 3 As shown, a support member 80 is provided between the moving contact assembly M and the elastic member 30, and the arc-shaped contact surface is located between the support member 80 and the moving contact assembly M. It should be understood that the adjustment of the relative position between the moving contact assembly M and the elastic member 30 is achieved through the support member 80. There are various possibilities for the specific structure of the support member 80.

[0102] In one embodiment, in the embodiment of the present application, the arc-shaped contact surface is provided on the moving contact assembly M; when the moving contact 20 contacts the static contact 10, the arc-shaped contact surface is used to adjust the state of the moving contact 20 so that the moving contact 20 reaches the balance point of contacting the static contact group. In a specific embodiment, as Figures 3 to 15 shown, the moving contact assembly M in the embodiment of the present invention includes both the moving contact 20 and the first magnetic conductive member 70 at the same time. The first magnetic conductive member 70 is provided between the moving contact 20 and the elastic member 30, and the position of the first magnetic conductive member 70 is fixed relative to the moving contact 20. It should be understood that the first magnetic conductive member 70 can play the role of the inner top plate of the contact support 60. In another specific embodiment, as Figures 16 to 26 shown, the moving contact assembly M only includes the moving contact 20.

[0103] Combined with the structural form of the moving contact assembly M, when specifically setting the arc-shaped contact surface in the embodiment of the present invention, there are various possibilities for the setting position and the forming form of the arc-shaped contact surface. Exemplarily, there are at least the following several structural examples.

[0104] Embodiment 1, as Figures 2 to 7 and Figures 8 to 13 shown, the moving contact 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 surface of the convex portion facing the elastic member 30.

[0105] It can be understood that, as Figures 2 to 7 and Figures 8 to 13 shown, the moving contact assembly M in this embodiment includes the moving contact 20 and the first magnetic conductive member 70, and the adjustment portion is provided on the first magnetic conductive member 70. Specifically, in the first embodiment, the first magnetic conductive member 70 has a first convex portion 701, and the arc-shaped contact surface is located on the surface of the first convex portion 701 of the first magnetic conductive member 70.

[0106] In the first embodiment, the elastic member 30 is a spring. A support member 80 is provided between the moving contact assembly M and the elastic member 30. The support member 80 covers the outer contour of the elastic member 30, and at least a part of the orthographic projection of the support member 80 on the moving contact assembly M is located within the orthographic projection of the inner contour of the elastic member 30 on the moving contact assembly M and is provided with a depression 801. The depression 801 sinks in the direction away from the moving contact assembly M; at least a part of the first convex portion 701 is placed in the depression 801; the arc-shaped contact surface contacts the inner surface of the depression 801.

[0107] In this embodiment, the arc-shaped 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 conforms to the shape of the arc-shaped contact surface to ensure the multi-angle adjustment effect on the moving spring assembly M.

[0108] It should be noted that in the first embodiment, the adjusting portion and the moving spring assembly M can be of a split structure. For example, Figures 4 to 7 ; or, the adjusting portion and the moving spring assembly M can be of an integral structure. For example, Figures 10 to 13 .

[0109] Specifically, when the adjusting portion and the moving spring assembly M are of a split structure, the convex portion can be a hemispherical structure, and the plane of the hemispherical structure can be installed on the side of the moving spring assembly M facing the elastic member 30 to form a shape similar to Figures 10 to 13 the shape where the first convex portion 701 is located on the first magnetic conductive member 70 as shown.

[0110] Or, the convex portion can be a sphere or an ellipsoid. A concave pit is provided on the surface of the moving spring assembly M, and then at least part of the convex portion is located in the concave pit. It should be understood that the convex portion being a sphere or an ellipsoid can be fixed in the concave pit or simply placed in the concave pit. Exemplarily, as Figures 4 to 7 shown, the first magnetic conductive member 701 is provided with a first concave pit 702, at least part of the first convex portion 701 is fixed in the first concave pit 702, and at least part of the first convex portion 701 protruding from the first concave pit 702 is placed in the recess 801 of the support member 80 to play a multi-angle adjustment role.

[0111] It should be noted that if the moving spring assembly M only includes the moving spring 20, the relevant structure design on the first magnetic conductive member 70 in the first embodiment can be carried out on the moving spring 20, and the multi-angle adjustment function of the moving spring 20 can be realized in cooperation with the support member 80.

[0112] Embodiment 2, as Figure 14 and Figure 15 shown, a adjusting portion is provided on the side of the moving spring assembly M facing the elastic member 30. The adjusting portion is a concave portion, and the arc-shaped contact surface is located on the surface of the concave portion facing the elastic member 30. It can be understood that, as Figure 14 and Figure 15 shown, in this embodiment, the moving spring assembly M includes a moving spring 20 and a first magnetic conductive member 70, and the adjusting portion is specifically provided on the first magnetic conductive member 70. Specifically, in the second embodiment, the first magnetic conductive member 70 has a first concave portion 703.

[0113] In the second embodiment, the elastic member 30 is a spring, and a support member 80 is provided between the moving spring assembly M and the elastic member 30. The support member 80 covers the outer contour of the elastic member 30, and at least a part of the orthographic projection of the support member 80 on the moving spring assembly M that is located within the orthographic projection of the inner contour of the elastic member 30 forms a protrusion 802; the protrusion 802 protrudes toward the moving spring assembly M, and at least a part of the protrusion 802 is placed in the first recess 703 and contacts the inner surface of the first recess 703.

[0114] In the second embodiment, the arc-shaped contact surface is located on the surface of the first magnetic conductive member 70. The relative position of the arc-shaped contact surface is specifically adjusted with 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 arc-shaped contact surface to ensure the multi-angle adjustment effect on the moving spring assembly M.

[0115] It should be noted that if the moving spring assembly M only includes the moving spring 20, the relevant structure design on the first magnetic conductive member 70 in the second embodiment can be carried out on the moving spring 20 to cooperate with the support member 80 to realize the multi-angle adjustment function of the moving spring 20. Exemplarily, as Figures 16 to 17 shown, a second recess 201 is provided on the moving spring 20, and the second recess 201 cooperates with the protrusion 802 on the support member 80.

[0116] Embodiment Three, as Figures 18 to 19 and Figures 20 to 21 shown, an adjustment portion is provided on the side of the moving spring assembly M facing the elastic member 30, and the adjustment portion is a convex portion protruding toward the elastic member 30; the arc-shaped contact surface is located on the surface of the convex portion facing the elastic member 30. In this embodiment, the elastic member 30 is exemplarily shown as a spring.

[0117] When the elastic member 30 is a spring, it can be set that at least a part of the convex portion is located within the inner contour of the spring; the arc-shaped contact surface contacts the inner contour of the spring.

[0118] It can be understood that in this embodiment, the moving spring assembly M only includes the moving spring 20, and the adjustment portion is specifically provided on the moving spring 20. Specifically, in the third embodiment, the moving spring 20 has a second convex portion 202, and the arc-shaped contact surface is located on the surface of the second convex portion 202. The relative position of the arc-shaped contact surface is specifically adjusted with the inner contour of the spring to ensure the multi-angle adjustment effect on the moving spring assembly M.

[0119] In the third embodiment, the adjustment portion and the moving spring assembly M can be of a split structure, as Figures 20 to 21 shown; or, the adjustment portion and the moving spring assembly M can be of an integral structure, as Figures 18 to 19 shown.

[0120] Specifically, when the adjustment portion and the dynamic spring assembly M are split structures, the convex portion 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 similar Figures 18 to 19 The second convex portion 202 is shown in the form of the dynamic spring 20. Of course, the plane of the hemispherical structure can also be provided with a protruding structure or a concave structure, and the dynamic spring assembly M can be provided with a concave structure and a protruding structure adapted to one side of the plane 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.

[0121] In addition, it is worth noting that the convex portion may also be formed by a fixing sheet, and the fixing sheet is fixed on the dynamic spring assembly M. Specifically, the fixing sheet may include a sheet-like body and a convex portion protruding from the sheet-like body.

[0122] Alternatively, the convex portion may be a sphere or an ellipsoid, and a concave pit is provided on the surface of the dynamic spring assembly M, and then at least part of the convex portion is placed in the concave pit. It should be understood that the convex portion as a sphere or an ellipsoid may be fixed in the concave pit or simply placed in the concave pit. For example, Figures 20 to 21 As shown, the movable spring 20 is provided with a second pit 203, at least part of the second protrusion 202 is located in the second pit 203, and at least part of the second protrusion 202 protruding from the second pit 203 is placed in the recess 801 of the support member 80 to play a multi-angle adjustment role.

[0123] 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 .

[0124] It should be understood that in the third embodiment, the elastic member 30 is a spring for illustrative purposes. Of course, the elastic member 30 may also be a leaf spring, and the arc-shaped contact surface contacts the surface of one side of the leaf spring facing the dynamic spring assembly M.

[0125] In addition, it is worth noting that, in addition to the structural arrangements in the above-mentioned embodiments 1 to 3, a simple adjustment portion can also be provided on the dynamic spring assembly M, and the control adjustment portion is a recessed portion. In this case, without using the support member 80, the position adjustment of the dynamic spring assembly M relative to the elastic member 30 can also be achieved only by the recessed portion, and the details are not repeated here.

[0126] In one embodiment, Figures 3 to 7 As shown, the contact device further includes a second magnetic conductive member 90, which is located on the side of the movable spring 20 away from the elastic member 30 to form a short-circuit ring around the movable spring assembly M.

[0127] 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 the resistance to short-circuit current.

[0128] It should be noted that the short-circuit ring can have various structural forms, and anti-short-circuit is not limited to whether the upper iron is fixed or the upper iron is follower. Specifically, it can be set according to requirements.

[0129] In one embodiment, as Figure 7 shown, when the elastic member 30 is a spring, at least part of the orthographic projection of the arc-shaped contact surface on the moving contact assembly M is located inside the orthographic projection of the inner ring contour of the elastic member 30 on the moving contact assembly M. It should be understood that a spring has an inner diameter and an outer diameter. In this embodiment, the inner ring contour of the elastic member 30 is the part that forms the inner diameter of the spring, and the outer ring contour of the elastic member 30 is the part that forms the outer diameter of the spring.

[0130] It should be noted that in the embodiment of the present invention, at least a part of the orthographic projection of the arc-shaped contact surface on the moving contact assembly M is located inside the orthographic projection of the elastic member 30 on the moving contact assembly M. This structural setting makes the self-adjustment effect of the moving contact assembly M better, and there is no need to set an assembly groove for the elastic member 30 on the moving contact assembly M, and the assembly of the elastic member 30 is simpler.

[0131] In order to further improve the self-adjustment effect of the moving contact assembly M, it can also be set that at least part of the middle part of the orthographic projection of the arc-shaped contact surface on the moving contact assembly M is located inside the orthographic projection of the inner ring contour of the elastic member 30 on the moving contact assembly M.

[0132] In one embodiment, when the elastic member 30 is a spring. The end face of the elastic member 30 that is used to contact the moving contact assembly M is a ground surface, that is, the surface of the elastic member 30 is ground flat. Or, the end face of the elastic member 30 that is used to contact the moving contact assembly M is the original wire diameter surface, that is, the surface of the elastic member 30 is not ground flat.

[0133] It should be noted that in the embodiment of the present application, an arc-shaped contact surface is added between the moving contact assembly M and the elastic member 30. This arc-shaped contact surface can play an adjustment effect whether the surface of the elastic member 30 is a ground surface or the original wire diameter surface, so that the moving contact assembly M can be flipped, and there is no flipping dead angle during the flipping process of the moving contact assembly M, thereby optimizing the performance of the contact device and even the relay.

[0134] In one embodiment, as Figures 22 to 27 shown, both ends of the moving contact 20 can move relative to the static contact group to form two contact areas; at least one of the static contacts 10 and the moving contact 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 realize the contact and separation between the moving contact 20 and the static contact 10.

[0135] It should be noted that each contact part 204 can form a contact position between the moving spring 20 and the static contact group. Accordingly, at least three contact parts 204 can form three contact positions between the moving spring 20 and the static contact group to ensure the probability of multi-position contact between the two and improve the reliability of the product. At the same time, more contact parts 204 can better reduce the contact resistance and the electro-dynamic repulsion force. At this time, the relay generates less heat and has higher reliability.

[0136] It is worth noting that under the same contact pressure, since the parallel contact resistance is smaller than the contact resistance of a single contact part 204, multi-position contact can reduce the total contact resistance inside the relay. Accordingly, the relay generates less heat and has higher reliability.

[0137] In addition, it can be understood that the electro-dynamic repulsion force is proportional to the square of the flowing current. The electro-dynamic repulsion force at multiple points reduces the total electro-dynamic repulsion force, which is beneficial to improving the short-circuit resistance of the product and enhancing the reliability of the relay.

[0138] It should be understood that the contact part 204 can be arranged on the moving spring 20 or the static contact 10 to achieve multi-position contact between the moving spring 20 and the static contact group.

[0139] In a specific embodiment, as Figures 22 to 27 shown, the moving spring assembly M is provided with at least three contact parts 204; at least three contact parts 204 correspond to two static contacts 10, and each contact part 204 is used to contact its corresponding static contact 10 to form a contact position.

[0140] Of course, the number of contact parts 204 on the moving spring assembly M can also be other or set in other forms. As Figure 27 shown, exemplarily, four contact parts 204 are formed on the moving spring 20 by a line contact method of one horizontal and one vertical to achieve a contact form with more than two contact positions between the moving spring 20 and the two static contacts 10. Among them, each contact part 204 can form a contact position with the static contact 10.

[0141] It is worth noting that, as Figures 22 to 26 shown, since the moving spring 20 and the static contact 10 in the relay will be ablated due to on-off operations when in contact, an uneven topography will be generated on the surface of the contact part 204. When the uneven surfaces of the contact part 204 come into contact with each other, if it happens that two higher positions are in contact at the moment of contact, the arc-shaped contact surface added between the moving spring 20 and the elastic part 30 can make the two contact positions between the moving spring 20 and the two static contacts 10 turn into more than two contact positions, for example, three contact positions, so as to improve the reliability of the product and better reduce the contact resistance and the electro-dynamic repulsion force.

[0142] In addition, it is worth noting that the static contact 10 can be shaped to cooperate with the contact portion 204 on the moving spring 20, so as to better achieve multi-position contact between the moving spring 20 and the static contact 10.

[0143] Finally, it should be noted that: It can be understood that the various embodiments / implementation manners provided by the present invention can be combined with each other without contradiction, and no further examples will be given here.

[0144] In the description of the embodiments of the invention, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance; the term "plurality" means two or more, unless otherwise clearly defined. Terms such as "installation", "connection", "connection", "fixation" and other terms should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; "connection" can be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the invention can be understood according to specific circumstances.

[0145] In the description of the embodiments of the invention, it should be understood that the orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "front", "rear", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the embodiments of the invention and simplifying the description, rather than indicating or implying that the device or unit referred to must have a specific direction, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation on the embodiments of the invention.

[0146] In the description of this specification, the description of terms such as "one embodiment", "some embodiments", "specific embodiments", etc. means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the embodiments of the invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0147] The above are only the preferred embodiments of the embodiments of the invention and are not used to limit the embodiments of the invention. For those skilled in the art, the embodiments of the invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the embodiments of the invention shall be included in the protection scope of the embodiments of the invention.

Claims

1. A contact device, characterized in that, Comprising: A static contact set, the static contact set including two static contacts; A moving spring assembly, the moving spring assembly including a moving spring, both ends of the moving spring being capable of moving relative to the static contact set so that both ends of the moving spring contact or disengage from the static contact set; An elastic member, the elastic member being disposed on a side of the moving spring assembly away from the static contact set; an arc-shaped contact surface is provided between the elastic member and the moving spring assembly.

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

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

4. The contacting device according to any one of claims 1-3, characterized in that A line segment between any two points on the contour line of the orthographic projection of the arc-shaped contact surface on the moving spring assembly 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 moving spring assembly and the elastic member, and the arc-shaped contact surface is located between the support member and the moving spring assembly.

6. The contacting device according to claim 1, characterized in that, The arc-shaped contact surface is provided on the moving spring assembly; when the moving spring contacts the static contact, the arc-shaped contact surface is used to adjust the state of the moving spring so that the moving spring reaches an equilibrium point of contacting the static contact set.

7. The contacting device according to claim 6, characterized in that, An adjustment portion is provided on a side of the moving spring assembly facing the elastic member, the adjustment portion being a convex portion protruding towards 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 moving spring assembly are of an integral structure.

9. The contacting device according to claim 7, characterized in that, The convex portion and the moving spring assembly are of a split structure.

10. The contacting device according to claim 9, characterized in that, The convex portion is of a hemispherical structure, and the flat side of the convex portion is mounted on a side of the moving 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 moving spring assembly facing the elastic member, and at least part of the convex portion is located in the concave pit.

11. The contacting device according to any one of claims 7 to 10, characterized in that, The elastic member is a spring; at least part of the convex portion is located within the inner contour of the elastic member; the arc-shaped contact surface contacts the inner 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 surface of the leaf spring facing the moving 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 moving spring assembly and the elastic member, the support member covering the outer contour of the elastic member, and at least part of the orthographic projection of the support member on the moving spring assembly where the orthographic projection of the inner contour of the elastic member on the moving spring assembly is located has a depression, and the depression sinks in a direction away from the moving spring assembly; At least part of the convex portion is placed in the depression; the arc-shaped contact surface contacts the inner surface of the depression.

14. The contacting device according to claim 6, characterized in that, An adjustment portion is provided on a side of the moving spring assembly facing the elastic member, the adjustment portion being 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, wherein The elastic member is a spring; a support member is provided between the moving contact assembly and the elastic member, the support member covers the outer contour of the elastic member, and at least a part of the positive projection of the support member on the moving contact assembly that is located within the positive projection of the inner contour of the elastic member on the moving contact assembly forms a protrusion; the protrusion protrudes towards the moving contact assembly, and at least a part of the protrusion is placed in the concave portion 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 provided on the moving contact.

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

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

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

20. The contacting device according to claim 19, characterized in that, At least a part of the middle of the positive projection of the arc-shaped contact surface on the moving contact assembly is located inside the positive projection of the inner contour of the elastic member on the moving contact assembly.

21. The contacting device according to claim 19, characterized in that, The end face of the elastic member for contacting the moving contact assembly is a grinding surface; Alternatively, the end face of the elastic member for contacting the moving contact assembly is the original wire diameter surface.

22. The contacting device according to any one of claims 1-3, characterized in that, Both ends of the moving contact can move relative to the static contact group to form two contact areas; at least one of the static contacts and the moving contact in each contact area has a contact part; the number of the contact parts in the two contact areas is at least three, and each contact part is used to achieve the contact and separation between the moving contact and the static contact.

23. The contacting device according to any one of claims 1-3, characterized in that, It further includes a contact support, and the moving contact assembly is installed on the contact support through the elastic member.

24. A relay, characterized in that, It includes the contact device according to any one of claims 1-23.

Images