Auxiliary contact structure and relay

Abstract

The present application discloses an auxiliary contact structure and a relay. The auxiliary contact structure comprises a mounting frame, an auxiliary contact assembly, and contact fingers. The mounting frame is provided with a circuit board; the auxiliary contact assembly is disposed on the circuit board, and slots are formed in the auxiliary contact assembly; and the contact fingers inserted into the slots.

Description

Auxiliary contact structure and relay

[0001] This application claims priority to Chinese patent application No. 202420133079.4 filed on January 18, 2024, the entire contents of which are incorporated herein by reference. Technical Field

[0002] The present application relates to the technical field of relay equipment, and in particular to an auxiliary contact structure and a relay. Background Art

[0003] Control electrical appliances such as contactors and relays usually carry one or more sets of auxiliary contacts to monitor the opening and closing status of the product's main contacts. The auxiliary contacts are led out in the form of lead wires, connectors, lead terminals, etc. to connect to an external power supply.

[0004] At present, the most commonly used and relatively reliable method for auxiliary contact lead-out is direct welding of wires. However, the use of welded lead-out wires can cause the wires to be crushed or broken during installation and transportation, and welding may also result in cold joints, which can damage the relay. Rubber-coated lead-out parts are also used at the connection points. The use of rubber-coated parts will inevitably result in more corners and require more welding points, thereby increasing the risk of failure. Technical issues

[0005] The main purpose of this application is to provide an auxiliary contact structure and a relay, aiming to reduce welding points, simplify the structure of the auxiliary contact, and improve the reliability of connection and use. Technical Solutions

[0006] To achieve the above objectives, the present application proposes an auxiliary contact structure, which includes:

[0007] a mounting frame, wherein the mounting frame is provided with a circuit board;

[0008] an auxiliary contact assembly, the auxiliary contact assembly being disposed on the circuit board, the auxiliary contact assembly being formed with a slot; and

[0009] A contact finger assembly is inserted into the slot.

[0010] In one embodiment, the auxiliary contact assembly includes two auxiliary static contact modules, each of the auxiliary static contact modules includes an auxiliary static contact and an adapter, the auxiliary static contact is provided on the mounting frame and electrically connected to the adapter, the adapter is provided on the circuit board, and the adapter forms the slot;

[0011] The contact finger assembly includes two contact fingers, and each contact finger is plugged into one of the slots.

[0012] In one embodiment, the circuit board is provided with a plug hole, and the adapter includes at least two adapter plates, which enclose the slot, one end of each of the adapter plates is fixed to the edge of the plug hole, and the other end of each of the adapter plates extends into the plug hole and extends away from the circuit board.

[0013] In one embodiment, the circuit board is further provided with at least two first limiting holes, and the at least two first limiting holes are evenly distributed around the plug hole at the periphery of the plug hole;

[0014] The adapter plate is provided with a positioning portion, and each of the positioning portions can extend into one of the first limiting holes to limit the adapter plate.

[0015] In one embodiment, the adapter further comprises:

[0016] a supporting portion connected to the positioning portion, the supporting portion being located between the first limiting hole and the plug-in hole and abutting against the circuit board; and

[0017] The elastic part is connected to the supporting part, and one end of the elastic part away from the supporting part extends into the plug hole and extends in a direction away from the supporting part.

[0018] In one embodiment, the extension direction of the elastic portion is arranged at an angle to the axial direction of the plug hole, and the elastic portion starts from the support portion and gradually extends toward the axial direction of the plug hole;

[0019] Alternatively, the elastic portion includes a first portion and a second portion, wherein the extension direction of the first portion is parallel to the axial direction of the plug hole, the extension direction of the second portion is arranged at an angle to the axial direction of the plug hole, and the second portion gradually extends toward the axial direction of the plug hole;

[0020] In one embodiment, the elastic portion is provided with a force unloading groove, and the force unloading groove is extended along the extension direction of the elastic portion;

[0021] And / or, a limiting groove is provided on the hole wall of the plug hole, and part of the supporting portion is limited in the limiting groove.

[0022] In one embodiment, the auxiliary static contact comprises:

[0023] A bottom film, the bottom film being limited on the mounting frame; and

[0024] Two vertical pieces, the two vertical pieces are connected to the bottom piece, the two vertical pieces extend away from the bottom piece toward the circuit board, and the two vertical pieces are electrically connected to the adapter.

[0025] In one embodiment, the circuit board is provided with two second limiting holes, and each of the vertical pieces is provided with a limiting post at one end away from the bottom piece, and the limiting post is limited in the second limiting hole;

[0026] And / or, the mounting frame is provided with a positioning convex bump, the bottom plate is provided with a positioning hole corresponding to the positioning convex bump, and the positioning convex bump extends into the positioning hole to limit the auxiliary static contact.

[0027] In one embodiment, the auxiliary contact assembly includes an auxiliary moving contact module and two auxiliary static contact modules, and one end of the auxiliary moving contact module is fixed to the circuit board;

[0028] Among them, the auxiliary contact structure has a conducting state and a separated state. In the conducting state, the other end of the auxiliary moving contact module is used to abut against the two auxiliary static contact modules to conduct the two auxiliary static contact modules. In the separated state, the other end of the auxiliary moving contact module is separated from the two auxiliary static contact modules.

[0029] In one embodiment, the auxiliary moving contact module includes:

[0030] an auxiliary moving contact, one end of which is fixedly connected to the circuit board, and the other end of which extends toward the auxiliary static contact module and is arranged opposite to the auxiliary static contact; and

[0031] an elastic member, one end of which is connected to the mounting bracket, and the other end of which is connected to the auxiliary moving contact;

[0032] Wherein, in the conducting state, the auxiliary moving contact presses the elastic member to abut against the two auxiliary static contact modules.

[0033] In one embodiment, the auxiliary moving contact is provided with a bent portion, the bent portion protrudes toward the auxiliary static contact module, and the bent portion is located at the movable end of the auxiliary moving contact;

[0034] And / or, the auxiliary moving contact is provided with a plurality of process holes.

[0035] The present application also proposes a relay, comprising:

[0036] Main contacts; and

[0037] As in the auxiliary contact structure described above, the main contact is connected to the mounting frame of the auxiliary contact structure. Beneficial effects

[0038] The auxiliary contact structure of the technical solution of the present application includes a mounting frame, an auxiliary contact assembly and a contact finger assembly. The mounting frame is provided with a circuit board, the auxiliary contact assembly is provided on the circuit board, the auxiliary contact assembly is formed with a slot, and the contact finger assembly is inserted into the slot. By plugging the contact finger assembly used for connecting to the external circuit into the slot, the electrical connection between the auxiliary contact assembly and the contact finger assembly is achieved, and the contact lead-out structure in the auxiliary contact assembly is made simpler, reducing the risk of failure caused by too many welding points, and effectively improving the reliability of connection and use. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0040] FIG1 is a schematic structural diagram of an auxiliary contact structure in one embodiment of the present application;

[0041] FIG2 is a schematic structural diagram of the auxiliary contact structure from another perspective in one embodiment of the present application;

[0042] FIG3 is a partial structural diagram of the auxiliary contact structure from another perspective in one embodiment of the present application;

[0043] FIG4 is a schematic structural diagram of a mounting frame according to an embodiment of the present application;

[0044] FIG5 is a schematic structural diagram of a circuit board in one embodiment of the present application;

[0045] FIG6 is a schematic structural diagram of an adapter sheet in one embodiment of the present application;

[0046] FIG7 is a schematic structural diagram of an auxiliary static contact in one embodiment of the present application;

[0047] FIG8 is a schematic structural diagram of an auxiliary moving contact in an embodiment of the present application.

[0048] Description of Figure Numbers:

[0049] Reference numerals Name Reference numerals Name 100 Auxiliary contact structure 2112 Vertical piece 1 Mounting frame 2112a Limiting column 11 Cylinder frame 212 Adapter 12 Mounting plate 2121 Adapter piece 121 Mounting plane 2121a Positioning portion 122 Positioning protrusion 2121b Support portion 13 Circuit board 2121c Elastic portion 131 Second mounting hole 2121d Force relief groove 132 Inserting hole 2121e Elastic strip 1321 Limiting groove 2122 Slot 133 First limiting hole 22 Auxiliary moving contact module 134 Second limiting hole 221 Auxiliary moving contact 1a Mounting space 2211 Bending portion 2 Auxiliary contact assembly 2212 Process hole 21 Auxiliary static contact module 222 Elastic member 211 Auxiliary static contact 3 Contact finger assembly 2111 Bottom film 31 Contact finger 2111a Positioning hole

[0050] The realization of the objectives, functional features and advantages of this application will be further explained in conjunction with embodiments and with reference to the accompanying drawings. Modes for Carrying Out the Invention

[0051] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0052] It should be noted that all directional indications in the embodiments of the present application (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0053] At the same time, the meaning of "and / or" or "and / or" appearing in the full text includes three options. Taking "A and / or B" as an example, it includes option A, or option B, or an option in which both A and B are satisfied.

[0054] In addition, the descriptions of "first", "second", etc. in this application are for descriptive purposes only and should not be understood as indicating or implying their relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between the various embodiments can be combined with each other, but this must be based on the fact that they can be implemented by ordinary technicians in this field. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0055] 1 to 8 , the present application proposes an auxiliary contact structure 100 , which includes a mounting frame 1 , an auxiliary contact assembly 2 , and a contact finger assembly 3 . The mounting frame 1 is provided with a circuit board 13 , the auxiliary contact assembly 2 is provided on the circuit board 13 , the auxiliary contact assembly 2 is formed with a slot 2122 , and the contact finger assembly 3 is inserted into the slot 2122 .

[0056] In this embodiment, the auxiliary contact structure 100 is applied to a relay. The relay generally includes a group of main contact structures and at least one group of auxiliary contact structures 100. The auxiliary contact structure 100 is mechanically connected to the main contact structure, so that under normal operation, after the main contact structure is closed, it will drive the auxiliary contact structure 100 to close as well, so that the closing status of the main contact structure can be detected through the auxiliary contact structure 100.

[0057] In this embodiment, the mounting frame 1 is a structural support portion 2121b of the auxiliary contact structure 100. The mounting frame 1 is used to install part of the main contact structure on the one hand, and to install the auxiliary contact assembly 2 on the other hand. The mounting frame 1 includes a barrel frame 11 and a mounting plate 12. A coil is wound on the barrel frame 11 to form a magnetic field. The mounting plate 12 is provided at one end of the barrel frame 11. The mounting plate 12 is formed with a mounting plane 121. The circuit board 13 is provided on the mounting plate 12. The circuit board 13 is arranged opposite to the mounting plane 121, and the extension plane of the circuit board 13 is provided. It is arranged parallel to the mounting plane 121, so that an installation space 1a is enclosed between the circuit board 13 and the mounting plate 12, and the auxiliary contact assembly 2 is arranged in the installation space 1a. The cylinder frame 11 is formed with a hollow through hole, and the mounting plate 12 is formed with a first mounting hole connecting the through hole and the installation space 1a. The circuit board 13 is formed with a second mounting hole 131 connecting the through hole and the installation space 1a. Part of the main contact structure can extend into the through hole and pass through the first mounting hole and the second mounting hole 131 to be connected to the auxiliary contact assembly 2 arranged in the installation space 1a.

[0058] By setting up the mounting frame 1, a coil can be wound to form a magnetic field, which cooperates with the main contact structure to realize circuit switching. At the same time, the mounting space 1a formed between the mounting plate 12 and the circuit board 13 can also provide a mounting area for the auxiliary contact assembly 2, thereby improving the structural compactness of the relay.

[0059] In this embodiment, as shown in FIG3 , the auxiliary contact assembly 2 is formed with a slot 2122, so that the contact finger assembly 3 can be inserted into the slot 2122. It is understood that the contact finger assembly 3 is used to connect the auxiliary contact assembly 2 and the external circuit. The contact finger assembly 3 is usually a metal pin. In a traditional structure, the contact finger assembly 3 and the auxiliary contact assembly 2 are connected by welding, thereby allowing the auxiliary contact assembly 2 to lead to the outside. However, the excessive number of welding points can easily lead to relay failure due to cold solder joints or desoldering. In addition, during installation and transportation, the solder joints may also break due to pressure and pulling, thus having considerable limitations.

[0060] In the present application, the contact finger assembly 3 is inserted into the slot 2122 to realize the connection between the contact finger assembly 3 and the auxiliary contact assembly 2, and the side wall of the slot 2122 has a certain elasticity. For example, the auxiliary contact assembly 2 forming the slot 2122 is set to a metal part with elasticity, so that the contact finger assembly 3 can be tightly connected with the side wall of the slot 2122 after being inserted into the slot 2122, so as to ensure the stability of the connection between the contact finger assembly 3 and the auxiliary contact assembly 2, and make the connection structure of the contact finger assembly 3 and the auxiliary contact assembly 2 simpler, and make the lead-out structure of the auxiliary contact assembly 2 simpler.

[0061] The auxiliary contact structure 100 of the present technical solution includes a mounting frame 1, an auxiliary contact assembly 2 and a contact finger assembly 3. The mounting frame 1 is provided with a circuit board 13, the auxiliary contact assembly 2 is arranged on the circuit board 13, the auxiliary contact assembly 2 is formed with a slot 2122, and the contact finger assembly 3 is inserted into the slot 2122. By plugging and matching the contact finger assembly 3 used for connecting to the external circuit with the slot 2122, the electrical connection between the auxiliary contact assembly 2 and the contact finger assembly 3 is achieved, and the contact lead-out structure in the auxiliary contact assembly 2 is made simpler, reducing the risk of failure caused by too many welding points, and effectively improving the reliability of connection and use.

[0062] In one embodiment, the auxiliary contact assembly 2 includes two auxiliary static contact modules 21, each auxiliary static contact module 21 includes an auxiliary static contact 211 and an adapter 212, the auxiliary static contact 211 is arranged on the mounting frame 1 and electrically connected to the adapter 212, the adapter 212 is arranged on the circuit board 13, and the adapter 212 forms a slot 2122; the contact finger assembly 3 includes two contact fingers 31, each contact finger 31 is inserted into a slot 2122.

[0063] In this embodiment, as shown in Figures 1 to 3 and Figure 7, the auxiliary contact assembly 2 includes two auxiliary static contact modules 21, which are arranged at intervals on the circuit board 13, and each auxiliary static contact module 21 includes an auxiliary static contact 211 and an adapter 212. The auxiliary static contact 211 is provided on the mounting plane 121 of the mounting plate 12, and the adapter 212 is provided on the circuit board 13, so that one end of the auxiliary static contact 211 extends toward the circuit board 13 and is electrically connected to the adapter 212. The adapter 212 is formed with a slot 2122, and the two slots 2122 are arranged at intervals so that each of the two contact fingers 31 can be inserted into one slot 2122.

[0064] The auxiliary contact structure 100 includes two auxiliary static contact modules 21 and one auxiliary moving contact module 22. The auxiliary moving contact module 22 is arranged on the circuit board 13. The auxiliary moving contact module 22 is mechanically connected to the main contact structure. When the main contact structure is closed under the action of electromagnetic force, it can drive the auxiliary moving contact module 22 to move. At this time, the auxiliary moving contact module 22 will abut against the two auxiliary static contact modules 21 at the same time, so that the two contact fingers 31 inserted on the two auxiliary static contact modules 21 can be conductive.

[0065] In one embodiment, the auxiliary moving contact module 22 will abut against the two auxiliary static contacts 211, and the two auxiliary static contacts 211 are respectively connected to the two adapters 212 and transmit current. A contact finger 31 is inserted on each adapter 212. When the auxiliary moving contact module 22 and the two auxiliary static contacts 211 abut against each other, the two contact fingers 31 are turned on, so that the external circuit is connected, so that the relay is closed normally, and the normal operation of the external circuit is ensured.

[0066] In one embodiment, the circuit board 13 is provided with a plug hole 132, and the adapter 212 includes at least two adapter plates 2121, which enclose at least two adapter plates 2121 to form a slot 2122. One end of each adapter plate 2121 is fixed to the edge of the plug hole 132, and the other end of each adapter plate 2121 extends into the plug hole 132 and extends away from the circuit board 13.

[0067] In this embodiment, as shown in Figures 1 to 5 and 6, a plug hole 132 is provided on the circuit board 13, and the plug hole 132 is connected to the above-mentioned installation space 1a, so that the adapter 212 can be extended into the plug hole 132. The adapter 212 includes at least two adapter plates 2121, and one end of each adapter plate 2121 is fixed on the circuit board 13 and is located at the edge of the plug hole 132. The other end of each adapter plate 2121 extends into the plug hole 132 and the installation space 1a, extending in a direction away from the circuit board 13, so that at least two adapter plates 2121 enclose and form a slot 2122, and the axis of the slot 2122 coincides with the axis of the plug hole 132.

[0068] The provision of the adapter piece 2121 enables the slot 2122 formed by the adapter 212 to be a petal-type structure, so that the slot 2122 has a certain expansion or contraction space. That is, when the contact finger 31 is inserted into the slot 2122, at least two adapter pieces 2121 can, on the basis of abutting against the contact finger 31, also tightly wrap the contact finger 31 through the elasticity of the material of the adapter piece 2121 itself, thereby effectively improving the plug-in firmness of the contact finger 31 and the adapter 212, and improving the reliability of the connection between the contact finger 31 and the auxiliary static contact module 21. At the same time, the provision of at least two adapter pieces 2121 can also enable the slot 2122 to adapt to contact fingers 31 of different sizes, thereby improving the versatility and adaptability of the auxiliary contact structure 100.

[0069] In one embodiment, the circuit board 13 is further provided with at least two first limiting holes 133, and the at least two first limiting holes 133 are evenly distributed around the plug hole 132 on the periphery of the plug hole 132; the adapter plate 2121 is provided with a positioning portion 2121a, and each positioning portion 2121a can extend into a first limiting hole 133 to limit the adapter plate 2121.

[0070] In this embodiment, as shown in Figures 3 to 6, the first limiting hole 133 is located at the periphery of the plug-in hole 132, and the first limiting hole 133 can be connected to the installation space 1a. At least two first limiting holes 133 are evenly arranged around the plug-in hole 132, that is, at least two plug-in holes 132 are distributed on the periphery of the plug-in hole 132 in a manner of evenly dividing the circumference. If two adapter plates 2121 are provided, the two first limiting holes 133 are relatively arranged along a straight line passing through the axis of the plug-in hole 132, and the adapter plate 2121 is provided with a positioning portion 2121a corresponding to the first limiting hole 133, and the positioning portion 2121a can extend into the first limiting hole 133.

[0071] An abutment platform is formed between the first limiting hole 133 and the plug-in hole 132, so that when the positioning portion 2121a is inserted into the first limiting hole 133, part of the structure of the adapter plate 2121 can be placed on the abutment platform to achieve positioning and fixation of the adapter plate 2121. At the same time, the end of the adapter plate 2121 away from the positioning portion 2121a extends into the plug-in hole 132 and the installation space 1a to form a slot 2122. By setting the first limiting hole 133, not only is the installation of the adapter plate 2121 simpler, but the adapter plate 2121 can also be effectively positioned and limited, making the installation of the adapter plate 2121 and the circuit board 13 more reliable and tight.

[0072] In one embodiment, the adapter 2121 is further provided with a supporting portion 2121b and an elastic portion 2121c, the supporting portion 2121b is connected to the positioning portion 2121a, the supporting portion 2121b is located between the first limiting hole 133 and the plug-in hole 132, and abuts against the circuit board 13, the elastic portion 2121c is connected to the supporting portion 2121b, and one end of the elastic portion 2121c away from the supporting portion 2121b extends into the plug-in hole 132 and extends in a direction away from the support portion 2121b.

[0073] In this embodiment, as shown in Figures 3 to 6, the adapter plate 2121 includes the above-mentioned positioning portion 2121a, the supporting portion 2121b and the elastic portion 2121c. The positioning portion 2121a and the elastic portion 2121c are both connected to the supporting portion 2121b. The supporting portion 2121b is the main supporting structure of the adapter plate 2121. When the positioning portion 2121a is inserted into the first limiting hole 133, the supporting portion 2121b abuts against the abutment platform, and the elastic portion 2121c connected to the supporting portion 2121b extends into the plug hole 132. The end of the elastic portion 2121c away from the supporting portion 2121b extends toward the plug hole 132 and the installation space 1a, and gradually extends toward the axial direction of the plug hole 132, so that the elastic portions 2121c of at least two adapter plates 2121 are close to each other at the end away from the supporting portion 2121b to enclose and form a slot 2122.

[0074] The supporting portion 2121b is used to install the positioning portion 2121a and the elastic portion 2121c. When the supporting portion 2121b abuts against the abutting platform, the positioning portion 2121a can be ensured to be tightly fitted and plugged into the first limiting hole 133 to ensure that the entire adapter 2121 is fixed to the circuit board 13. At the same time, the elastic portion 2121c can be set in the plug-in hole 132 to enclose and form a slot 2122, wherein the elastic portion 2121c extends in the axial direction of the plug-in hole 132, so that the ends of at least two elastic portions 2121c are gathered together to facilitate the insertion of the contact finger 31, and through the elasticity of the metal material of the elastic portion 2121c itself, it can tightly wrap the abutting contact finger 31 after the contact finger 31 is inserted, effectively improving the plug-in firmness and reliability of the contact finger 31 and the adapter 212.

[0075] In one embodiment, the extension direction of the elastic portion 2121c is set at an angle to the axial direction of the plug hole 132, and the elastic portion 2121c starts from the support portion 2121b and gradually extends toward the axial direction of the plug hole 132; or, the elastic portion 2121c includes a first part and a second part, the extension direction of the first part is parallel to the axial direction of the plug hole 132, the extension direction of the second part is set at an angle to the axial direction of the plug hole 132, and the second part gradually extends toward the axial direction of the plug hole 132.

[0076] As shown in Figure 6, the extension direction of all or part of the elastic portion 2121c is set at an angle to the axial direction of the plug hole 132. For example, the elastic portion 2121c extends and transitions from the support portion 2121b to the axial direction of the plug hole 132, so that the ends of the elastic portions 2121c of at least two adapter plates 2121 away from the support portion 2121b gradually move closer to each other and shrink, so that the slot 2122 is set to gradually shrink. When the contact finger 31 is inserted into the slot 2122, the end of the elastic portion 2121c away from the support portion 2121b can tightly wrap the contact finger 31 by shrinking, so as to improve the connection firmness and reliability of the contact finger 31 and the adapter 212. Furthermore, the elastic portion 2121c may also include a first part and a second part, the extension direction of the first part is parallel to the axial direction of the plug hole 132, and the second part gradually extends toward the axial direction of the plug hole 132. Such a configuration can further improve the elastic force of the elastic portion 2121c through the first part, improve the overall fatigue strength of the elastic portion 2121c, enhance the pressing force of the second part on the contact finger 31, and improve the connection reliability between the contact finger 31 and the adapter 212.

[0077] In one embodiment, the elastic portion 2121c is provided with a unloading groove 2121d, which is extended along the extension direction of the elastic portion 2121c; it can be understood that, as shown in Figure 6, the unloading groove 2121d is set through the elastic portion 2121c, and the unloading groove 2121d is in the same extension direction as the elastic portion 2121c, and the unloading groove 2121d is opened at the end of the elastic portion 2121c away from the support portion 2121b, so that the elastic portion 2121c is divided into two parallel elastic strips 2121e. Such a setting can increase the elastic force of the elastic portion 2121c of the adapter plate 2121, improve the fatigue strength of the elastic portion 2121c, and make the contact finger 31 and the adapter plate 2121 plug-in fit tighter.

[0078] In one embodiment, a limiting groove 1321 is defined in the wall of the plug hole 132, and a portion of the support portion 2121b is positioned within the limiting groove 1321. It is understood that, as shown in FIG5 , the limiting groove 1321 is communicated with the plug hole 132, and the support portion 2121b comprises two mutually perpendicular portions, one portion abutting against the abutting platform, and the other portion being positioned within the limiting groove 1321 and abutting against the sidewall of the limiting groove 1321, thereby limiting and securing the support portion 2121b. Combined with the first limiting hole 133, this can effectively enhance the secure connection between the circuit board 13 and the adapter plate 2121, thereby improving the reliability of the connection between the contact finger 31 and the adapter 212.

[0079] In one embodiment, the auxiliary static contact 211 includes a bottom plate 2111 and two vertical plates 2112. The bottom plate 2111 is limited on the mounting frame 1. The two vertical plates 2112 are connected to the bottom plate 2111. The two vertical plates 2112 extend away from the bottom plate 2111 toward the circuit board 13. The two vertical plates 2112 are electrically connected to the adapter 212.

[0080] In this embodiment, as shown in Figure 7, the auxiliary static contact 211 is arranged in the installation space 1a, the bottom plate 2111 is limited on the installation plane 121 of the mounting frame 1, and the two vertical plates 2112 are connected to the bottom plate 2111 and extend from the bottom plate 2111 toward the direction of the circuit board 13, and the two vertical plates 2112 are electrically connected to the adapter 212. A contact area is also provided on the bottom plate 2111, and the contact area is arranged in a plane.

[0081] On the one hand, the bottom plate 2111 is fixed on the mounting plane 121 to fix the two vertical plates 2112. On the other hand, through the extension of the vertical plates 2112, a movable space is left between the auxiliary moving contact module 22 and the bottom plate 2111, so that the auxiliary moving contact module 22 can move toward the bottom plate 2111 and abut against the bottom plate 2111. The vertical plates 2112 are used to electrically connect the bottom plate 2111 and the adapter 212. Specifically, the bottom plate 2111 abuts against the auxiliary moving contact module 22 through the contact area. Further, when the auxiliary contact structure 100 is in the conductive state, the auxiliary moving contact module 22 approaches the bottom plate 2111 and finally abuts against the two spaced bottom plates 2111. Further, the bottom plate 2111 is connected to the adapter 212 through the vertical plates 2112, and is finally electrically connected to the external circuit through the contact fingers 31, so that the external circuit is conductive, thereby completing the closure of the auxiliary contact.

[0082] In one embodiment, the circuit board 13 is provided with two second limiting holes 134, and a limiting column 2112a is provided at one end of each vertical piece 2112 away from the bottom piece 2111, and the limiting column 2112a is limited in the second limiting hole 134; it can be understood that, as shown in Figures 4 and 5, the limiting column 2112a can be inserted into the second limiting hole 134, so that the two second limiting holes 134 limit the installation of the two vertical pieces 2112, thereby fixing the auxiliary static contact 211, ensuring the reliability of the electrical connection between the auxiliary static contact 211 and the adapter 212, and avoiding connection failure due to movement of the auxiliary static contact 211.

[0083] In one embodiment, the mounting frame 1 is provided with a positioning bump 122, and the bottom plate 2111 is provided with a positioning hole 2111a corresponding to the positioning bump 122. The positioning bump 122 extends into the positioning hole 2111a to limit the auxiliary static contact 211. It is understandable that the mounting frame 1 is provided with a positioning bump 122 on the mounting plane 121, and the bottom plate 2111 is provided with a positioning hole 2111a corresponding to the positioning bump 122, so that the positioning bump 122 extends into the positioning hole 2111a to limit and position the bottom plate 2111, thereby achieving positioning and limiting of the auxiliary static contact 211, ensuring the reliability of the electrical connection between the auxiliary static contact 211 and the adapter 212, as well as the reliability of the connection between the auxiliary static contact 211 and the auxiliary movable contact module 22 in the conductive state.

[0084] In one embodiment, the auxiliary contact assembly 2 includes an auxiliary moving contact module 22 and two auxiliary static contact modules 21, and one end of the auxiliary moving contact module 22 is fixed to the circuit board 13; wherein, the auxiliary contact structure 100 has a conducting state and a separated state. In the conducting state, the other end of the auxiliary moving contact module 22 is used to abut against the two auxiliary static contact modules 21 to conduct the two auxiliary static contact modules 21, and in the separated state, the other end of the auxiliary moving contact module 22 is separated from the two auxiliary static contact modules 21.

[0085] In this embodiment, as shown in Figures 1 to 3, one end of the auxiliary moving contact module 22 is fixed on the circuit board 13, and the other end of the auxiliary moving contact module 22 extends toward the auxiliary static contact 211 and is arranged relative to the bottom plate 2111. The end of the auxiliary moving contact module 22 that is arranged relative to the auxiliary static contact 211 can approach or move away from the bottom plate 2111, and in the conductive state, abuts against the bottom plate 2111.

[0086] The auxiliary moving contact module 22 can be elastically connected to the circuit board 13 and / or the mounting plate 12, so that in the separated state, the auxiliary moving contact module 22 is separated from the bottom plate 2111. In the conductive state, the auxiliary moving contact module 22 can overcome the elastic force and approach the bottom plate 2111 and abut against the bottom plate 2111 to achieve circuit conduction.

[0087] In one embodiment, the auxiliary moving contact module 22 includes an auxiliary moving contact 221 and an elastic member 222, one end of the auxiliary moving contact 221 is fixedly connected to the circuit board 13, the other end of the auxiliary moving contact 221 extends toward the auxiliary static contact module 21, and is arranged opposite to the auxiliary static contact 211, one end of the elastic member 222 is connected to the mounting frame 1, and the other end of the elastic member 222 is connected to the auxiliary moving contact 221; wherein, in the conducting state, the auxiliary moving contact 221 squeezes the elastic member 222 to abut the two auxiliary static contact modules 21.

[0088] In this embodiment, as shown in Figures 1 and 2, the auxiliary moving contact 221 includes a fixed end and a movable end, which are arranged at both ends of the extension direction of the auxiliary moving contact 221. The fixed end is fixed on the circuit board 13, and the movable end can move relative to the fixed end and can move closer to or away from the bottom film 2111. One end of the elastic member 222 is connected to the mounting plate 12 of the mounting frame 1, and the other end is connected to the auxiliary moving contact 221, and the elastic member 222 is closer to the movable end relative to the fixed end.

[0089] The main contact structure is mechanically connected to the auxiliary moving contact 221. When the main contact structure is closed, it will drive the auxiliary moving contact 221 to move. The auxiliary moving contact 221 will overcome the elastic force of the elastic member 222 and move closer to the bottom plate 2111. In the conductive state, the auxiliary moving contact 221 respectively abuts against the bottom plates 2111 of the two auxiliary static contact modules 21 to achieve conduction of the external circuit. At the same time, the elastic member 222 is provided to ensure that the auxiliary moving contact 221 can be quickly reset when the main contact structure is disconnected, to avoid contact with the auxiliary static contact module 21.

[0090] In one embodiment, the auxiliary moving contact 221 is provided with a bending portion 2211, which protrudes toward the auxiliary static contact module 21, and the bending portion 2211 is located at the movable end of the auxiliary moving contact 221; it can be understood that, as shown in Figure 8, the auxiliary moving contact 221 is provided with a bending portion 2211 at the movable end, and the bending portion 2211 protrudes toward the auxiliary static contact module 21, so that when the movable end moves toward the bottom plate 2111, it can better abut against the bottom plate 2111 through the protrusion of the bending portion 2211, thereby improving the abutment effect and the circuit conduction effect.

[0091] In one embodiment, the auxiliary movable contact 221 is provided with a plurality of process holes 2212. As shown in FIG8 , it is understood that the provision of the process holes 2212 can increase the toughness of the auxiliary movable contact 221, improve the fatigue strength of the auxiliary movable contact 221, and ensure that the auxiliary movable contact 221 quickly resets when released.

[0092] The present application also provides a relay comprising a main contact and the aforementioned auxiliary contact structure 100, wherein the main contact is connected to a mounting bracket 1 of the auxiliary contact structure 100. The specific structure of the auxiliary contact structure 100 is described with reference to the aforementioned embodiments. Since the present relay utilizes all the technical solutions of all the aforementioned embodiments, it at least has all the beneficial effects brought about by the technical solutions of the aforementioned embodiments, which will not be detailed here.

[0093] The above description is merely an embodiment of the present application and does not limit the patent scope of the present application. All equivalent structural transformations made based on the contents of the present application specification and drawings, or direct / indirect application in other related technical fields, are included in the patent protection scope of the present application.

Claims

1. An auxiliary contact structure, wherein, The auxiliary contact structure includes: a mounting bracket, on which a circuit board is provided; an auxiliary contact assembly, which is arranged on the circuit board and forms a slot; and a finger assembly, which is inserted into the slot.

2. The auxiliary contact structure according to claim 1, wherein, The auxiliary contact assembly includes two auxiliary stationary contact modules. Each auxiliary stationary contact module includes an auxiliary stationary contact and an adapter. The auxiliary stationary contact is arranged on the mounting bracket and electrically connected to the adapter. The adapter is arranged on the circuit board, and the adapter forms the slot; The finger assembly includes two fingers, and each finger is inserted into one of the slots.

3. The auxiliary contact structure according to claim 2, wherein The circuit board is provided with insertion holes. The adapter includes at least two adapter pieces, and at least two adapter pieces enclose to form the slot. One end of each adapter piece is fixed to the edge of the insertion hole, and the other end of each adapter piece extends into the insertion hole and extends away from the circuit board.

4. The auxiliary contact structure according to claim 3, wherein, The circuit board is also provided with at least two first limiting holes, and at least two first limiting holes are evenly distributed around the insertion hole on the periphery of the insertion hole; The adapter piece is provided with a positioning portion, and each positioning portion can extend into one of the first limiting holes to limit the adapter piece.

5. The auxiliary contact structure according to claim 4, wherein, The adapter piece is further provided with: a supporting portion, which is connected to the positioning portion. The supporting portion is located between the first limiting hole and the insertion hole and abuts against the circuit board; and an elastic portion, which is connected to the supporting portion. One end of the elastic portion away from the supporting portion extends into the insertion hole and extends away from the supporting portion.

6. The auxiliary contact structure according to claim 5, wherein, The extending direction of the elastic portion is arranged at an angle with the axial direction of the insertion hole. The elastic portion starts from the supporting portion and gradually extends towards the axial direction of the insertion hole; or, the elastic portion includes a first part and a second part. The extending direction of the first part is parallel to the axial direction of the insertion hole, and the extending direction of the second part is arranged at an angle with the axial direction of the insertion hole, and the second part gradually extends towards the axial direction of the insertion hole.

7. The auxiliary contact structure according to claim 5, wherein The elastic portion is provided with a force relief groove, and the force relief groove extends along the extending direction of the elastic portion; and / or, a limiting groove is formed on the hole wall of the insertion hole, and part of the supporting portion is limited in the limiting groove.

8. The auxiliary contact structure according to claim 2, wherein, The auxiliary stationary contact includes: a bottom piece, which is limited on the mounting bracket; and two vertical pieces, which are connected to the bottom piece. The two vertical pieces extend towards the circuit board away from the bottom piece, and the two vertical pieces are electrically connected to the adapter.

9. The auxiliary contact structure according to claim 8, wherein, The circuit board is provided with two second limiting holes. A limiting post is arranged at one end of each vertical piece away from the bottom piece, and the limiting post is limited in the second limiting hole; and / or, the mounting bracket is provided with a positioning convex bump, and the bottom piece is provided with a positioning hole corresponding to the positioning convex bump. The positioning convex bump extends into the positioning hole to limit the auxiliary stationary contact.

10. The auxiliary contact structure according to any one of claims 1 to 9, wherein, The auxiliary contact assembly includes an auxiliary moving contact module and two auxiliary stationary contact modules. One end of the auxiliary moving contact module is fixedly arranged on the circuit board; Among them, the auxiliary contact structure has a conducting state and a separated state. In the conducting state, the other end of the auxiliary moving contact module is used to abut against the two auxiliary static contact modules to conduct the two auxiliary static contact modules. In the separated state, the other end of the auxiliary moving contact module is separated from the two auxiliary static contact modules.

11. The auxiliary contact structure according to claim 10, wherein, The auxiliary moving contact module includes: an auxiliary moving contact, one end of the auxiliary moving contact is fixedly connected to the circuit board, the other end of the auxiliary moving contact extends towards the auxiliary static contact module and is arranged opposite to the auxiliary static contact; and an elastic member, one end of the elastic member is connected to the mounting bracket, and the other end of the elastic member is connected to the auxiliary moving contact; wherein, in the conducting state, the auxiliary moving contact presses the elastic member to abut against the two auxiliary static contact modules.

12. The auxiliary contact structure according to claim 11, wherein, The auxiliary moving contact is provided with a bending portion, the bending portion protrudes towards the auxiliary static contact module, and the bending portion is located at the movable end of the auxiliary moving contact; and / or, the auxiliary moving contact is provided with a plurality of process holes.

13. A relay, wherein, The relay includes: a main contact; and the auxiliary contact structure according to any one of claims 1 to 12, the main contact being connected to the mounting bracket of the auxiliary contact structure.

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