Contactor

Abstract

A contactor comprises a first function module, a second function module and a third function module, the second function module is arranged between the first function module and the third function module, the first function module is provided with a coil of an electromagnetic system, and the electromagnetic system comprises a movable iron core and a coil used for driving the movable iron core to move. The second function module comprises a contact system and a contact wiring terminal, the contact system comprises a static contact and a moving contact, the moving contact is installed on a contact support driven by the electromagnetic system, a moving iron core of the electromagnetic system is connected with the contact support, the static contact is connected with the working circuit through the contact wiring terminal, and the moving iron core of the electromagnetic system is connected with the working circuit. A surge protection module is arranged in the third function module, the surge protection module is connected with one ends of two surge connection structures respectively, the two surge connection structures penetrate through the second function module and are connected with the two ends of the coil in the first function module respectively, and the surge protection module is connected between the two ends of the coil in parallel. And space outside the contactor is not occupied.

Description

Technical Field

[0001] The utility model relates to the field of low-voltage electrical appliances, and particularly relates to a contactor. Background Art

[0002] The development trend of existing contactors is towards miniaturization of volume, compactness of structure, internalization of accessories, convenience of wiring and diversification of functions. More and more contactors are provided with surge protection modules. When the contactor operates, a spike voltage or current will be generated in the coil circuit. The surge protection module can conduct and shunt in an extremely short time, thereby avoiding damage to other devices in the circuit caused by surges, and thus improving the reliability and stability of the system.

[0003] In existing contactors, the surge protection module usually consists of one or a group of electronic components, and is connected in parallel to the A1 terminal and the A2 terminal at both ends of the coil through a certain electrical combination method. However, the A1 terminal and the A2 terminal at both ends of the coil are usually oppositely arranged on both sides of the contactor and are located in the middle of the contactor, resulting in inconvenient installation and disassembly of the surge protection module, or only occupying the space outside the product, causing inconvenience to customers. Summary of the Utility Model

[0004] The purpose of the utility model is to overcome at least one defect of the prior art and provide a contactor.

[0005] To achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A contactor includes a first functional module, a second functional module and a third functional module. The second functional module is arranged between the first functional module and the third functional module.

[0007] The first functional module is provided with a coil of an electromagnetic system. The electromagnetic system includes a moving iron core and a coil for driving the moving iron core to move.

[0008] The second functional module includes a contact system and contact terminals. The contact system includes a static contact and a moving contact. The moving contact is installed on a contact support driven by the electromagnetic system. The moving iron core of the electromagnetic system is connected to the contact support. The static contact is connected to the working circuit through the contact terminal.

[0009] The third functional module is provided with a surge protection module. One end of the surge protection module is respectively connected to two surge connection structures. The two surge connection structures pass through the second functional module and are respectively connected to both ends of the coil in the first functional module, so that the surge protection module is connected in parallel between both ends of the coil.

[0010] Preferably, the surge connection structure includes a coil connection structure, which is arranged in the second functional module, electrically connected to the coil, and the surge protection module is electrically connected to the coil connection structure.

[0011] Preferably, the surge connection structure further includes a coil terminal block, which is arranged in the third functional module, used for connecting wires, the coil connection structure is used for electrically connecting the coil terminal block and the coil, and the surge protection module is electrically connected to the coil terminal block.

[0012] Preferably, the surge protection module includes a surge protection unit, which includes one or more electronic components, and both ends of the surge protection unit are respectively connected to two coil terminal blocks.

[0013] Preferably, the surge protection unit includes a varistor, which is fixed in the contactor, and the pins at both ends of the varistor are respectively connected to two coil terminal blocks.

[0014] Preferably, the surge protection module further includes an electronic circuit board, and the surge protection unit is installed on the electronic circuit board.

[0015] Preferably, the electronic circuit board includes a support wiring area and two electrical connection areas oppositely arranged on both sides of the support wiring area. The surge protection unit is arranged on the support wiring area, and the support wiring area is used to be inserted between two coil terminal blocks. Conductive layers are respectively arranged on the surfaces of one side of the two electrical connection areas, and the conductive layers are used for electrically connecting the coil terminal blocks.

[0016] Preferably, the coil terminal block includes a coil connection piece, a coil pressing piece and a coil connection screw, and two connecting rods respectively connected to the coil connection piece. The coil connection screw passes through the coil pressing piece and is connected to the coil connection piece. The coil connection screw is used to drive the coil pressing piece to press the wire tightly on the coil connection piece, and the two electrical connection areas are used to be respectively inserted between the two connecting rods on both sides of the coil terminal block.

[0017] Preferably, at least one connecting rod is provided with a clamping boss protruding towards the other connecting rod, and the clamping boss is used for limiting the electrical connection area.

[0018] Preferably, the electrical connection area is provided with a spring piece, and between the electrical connection area and the two connecting rods, the spring piece is used for limiting and electrically connecting with the connecting rod.

[0019] Preferably, the third functional module includes a face cover, which is provided with a sealing hole for passing through the surge protection module and a sealing plug for detachably installing into the sealing hole.

[0020] Preferably, the sealing plug is provided with a limiting structure for limiting the electronic circuit board, and the electronic circuit board is installed on the sealing plug through the limiting structure. During the installation of the sealing plug to the face cover, the electronic circuit board is driven by the sealing plug to insert the electrical connection area between the two connecting rods.

[0021] Preferably, the sealing plug is provided with two limiting structures, and the two limiting structures are respectively provided with two opposite limiting rods, and a limiting buckle arranged between the two limiting rods and away from the other limiting structure. The limiting buckle and the two limiting rods form a U-shaped limiting groove, and the electrical connection area of the electronic circuit board can be inserted into the limiting groove. A limiting slot for snapping the limiting buckle is provided in the electrical connection area.

[0022] Preferably, the sealing plug includes a first sealing plate and a second sealing plate arranged on one side of the first sealing plate along the width direction, the length of the second sealing plate is smaller than the length of the first sealing plate, and the two ends of the side edge of the first sealing plate away from the second sealing plate along the length direction are respectively provided with a first clip protruding in the height direction, and the two side edges opposite to each other in the length direction of the second sealing plate are respectively provided with a second clip protruding in the height direction, the first clip and the second clip are respectively used to be inserted into the inner side of the face cover, and the first clip and the second clip are respectively clamped on the inner side wall of the face cover, and are limitedly matched along the limit height direction.

[0023] Preferably, the second functional module includes a base and a cover mounted on the outside of the base, wherein the cover is buckled on the top side of the base. After the electronic circuit board is installed in place, one side of the electronic circuit board contacts the top side of the base, and the other side opposite to the electronic circuit board presses against the first sealing plate, thereby limiting the first sealing plate in the height direction.

[0024] Preferably, the face cover is provided with two opposite first side panels, and two second side panels located between the two first side panels, a space for accommodating the support wiring area is formed between the two second side panels, the two second side panels are spaced apart from the two first side panels, a face cover socket is formed between the second side panels and the first side panels, the connecting rod of the coil terminal is used to be inserted into the face cover socket, a face cover slot is provided on the second side panel, and when the electronic circuit board is installed, the electrical connection area is driven to be inserted into the face cover slot, and the electrical connection area is slidably fitted with the face cover slot.

[0025] Preferably, the second functional module includes a base and a cover sleeved on the outside of the base, the contact system is arranged on the inside of the base, and the coil connection structure is located between the outside of the base and the inside of the cover.

[0026] Preferably, a coil wiring groove is provided on the side surface of the base, and the coil wiring groove is used to accommodate the coil connection structure.

[0027] The contactor of this embodiment enables the surge protection module and the coil to be arranged in the third functional module and the first functional module on both sides of the second functional module by providing two surge connection structures passing through the second functional module. Since the third functional module is located at the topmost side and the surge protection module is arranged in the third functional module, it is convenient for installation and disassembly. Moreover, the surge protection module is directly installed in the contactor without occupying the space outside the contactor.

[0028] In addition, by passing the coil connection structure through the second functional module, the coil terminal can be arranged in the third functional module together with the surge protection module, enabling the coil terminal to serve two functions: wiring the coil and connecting the surge protection module. This not only facilitates the wiring of the coil but also the installation and use of the surge protection module.

[0029] In addition, the face cover is of a split structure. The face cover is provided with a sealing hole for passing through the surge protection module and a sealing plug that can be detachably installed in the sealing hole. To install and disassemble the surge protection module, only the sealing plug needs to be opened without removing the face cover, which is convenient for the customer to operate. The contactor and the surge protection module can be purchased separately. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 is a schematic structural diagram of the contactor of the present utility model;

[0031] Figure 2 is a schematic structural diagram of the contactor of the present utility model after hiding the face cover;

[0032] Figure 3 is an assembly schematic diagram of the cover of the contactor of the present utility model;

[0033] Figure 4 is a schematic diagram of the cooperation between the interlock module and two contactors of the present utility model;

[0034] Figure 5 is the present utility model Figure 4 partial enlarged view;

[0035] Figure 6 is a schematic structural diagram of the contact support of the present utility model;

[0036] Figure 7 is a schematic structural diagram of the surge protection unit of the present utility model directly installed on the surge connection structure;

[0037] Figure 8 is the present utility model Figure 6 structural schematic diagram of the surge connection structure in;

[0038] Figure 9 is a schematic structural diagram of the electronic circuit board of the present utility model installed on the surge connection structure;

[0039] Figure 10 It is a schematic structural diagram of an electronic circuit board in the first embodiment of a surge protection module;

[0040] Figure 11 It is a schematic structural diagram of a coil terminal in the first embodiment of a surge protection module;

[0041] Figure 12 It is a schematic structural diagram of an electronic circuit board in the second embodiment of a surge protection module;

[0042] Figure 13 It is a schematic structural diagram of a coil terminal in the second embodiment of a surge protection module;

[0043] Figure 14 It is a schematic structural diagram of the integral face cover of the present utility model;

[0044] Figure 15 It is a schematic structural diagram of the split face cover of the present utility model;

[0045] Figure 16 It is a schematic structural diagram of the sealing plug of the present utility model;

[0046] Figure 17 It is a schematic diagram of installing the surge protection module of the present utility model onto the sealing plug;

[0047] Figure 18 It is a schematic structural diagram of the face cover of the present utility model;

[0048] In the figure, there is a first functional module 1; a second functional module 2; a third functional module 3; a coil terminal 31; a face cover 32; an interlock module 33; an auxiliary contact module 34; a surge protection module 35; a base 21; a cover 22; a contact terminal 23; a stationary contact 24; a contact support 25; a coil connection structure 26; a first conductive member 261; a second conductive member 262; a coil wire groove 210; a clamping spring piece 263; a contact part 264; a connecting part 265; a coil connection piece 311; a coil pressing piece 312; a coil connection screw 313; an auxiliary support part 251; an auxiliary stationary contact 341; an auxiliary terminal 342; an auxiliary moving contact 343; an auxiliary support groove 252; an auxiliary spring platform 253; an auxiliary limiting surface 254; a sealing plug 321; an interlock member 331; a pivoting part 332; a first locking part 333; a second locking part 334; a surge protection unit 351; a welding part 3110; an electronic circuit board 352; a support wire area 3521; an electrical connection area 3522; a connecting rod 3111; a clamping protrusion 3112; a spring piece 3523; a sealing hole 322; a limiting structure 353; a limiting rod 354; a limiting buckle 355; a limiting card slot 3524; a first sealing plate 3211; a second sealing plate 3212; a first buckle 3213; a second buckle 3214; a first side plate 323; a second side plate 324; a face cover jack 325; a face cover slot 326. Detailed implementation manners

[0049] The following embodiments given in conjunction with the drawings further illustrate the detailed implementation manners of the contactor of the present invention. The contactor of the present invention is not limited to the descriptions of the following embodiments.

[0050] As Figures 1-3 shown, the contactor of this embodiment is divided into upper, middle, and lower three-layer structures according to the hierarchical structure. The main structure of the three-layer structure is the first functional module 1, the second functional module 2, and the third functional module 3 sequentially arranged in the housing. The second functional module 2 is located between the first functional module 1 and the third functional module 3;

[0051] The first functional module 1 includes a base and an electromagnetic system (a coil not shown in the figure) arranged in the base. The electromagnetic system includes a moving iron core and a coil for driving the moving iron core to move. Outside the base, there is an installation structure (not shown in the figure). The installation structure is used to install the contactor in the working position. The installation structure can include rail installation and screw installation holes;

[0052] The third functional module 3 includes an auxiliary module and two coil terminals 31 for connecting the control circuit, and a face cover 32 for covering the auxiliary module and the two coil terminals 31. The auxiliary module includes one or any combination of the interlock module 33 and the auxiliary contact module 34;

[0053] The second functional module 2 includes a base 21 mounted on the first functional module 1 and a cover 22 sleeved outside the base 21. A contact system, an arc extinguishing system (not shown in the figure), and contact terminals 23 electrically connected to the contact system are provided in the base 21. The contact system includes at least one moving contact and two static contacts 24 respectively arranged at both ends of the moving contact. The moving contact is mounted on a contact support 25 driven by an electromagnetic system. The contact support 25 drives the moving contact to contact and separate from the corresponding two static contacts 24 under the drive of the electromagnetic system, so that conduction or disconnection is achieved between the two static contacts 24 through the moving contact. One end of the static contact 24 far from the corresponding moving contact extends outside the base 21 and is connected to the contact terminal 23. The contact support 25 is slidably arranged in the second functional module 2. The moving iron core of the electromagnetic system is connected to the contact support 25 and drives the contact support 25 to move linearly up and down. The moving iron core is located at the connection between the third functional module 3 and the second functional module 2 and can be located inside the second functional module 2 or the third functional module 3. When the contact support 25 moves linearly, its bottom can move to the connection between the third functional module 3 and the second functional module 2 or move into the first functional module 1, and its top can move into the third functional module 3. The base of the first functional module 1, the base 21 of the second functional module 2, the cover 22 of the second functional module 2, and the face cover 32 of the third functional module 3 form the housing of the contactor.

[0054] As Figure 3 shown, an improvement point of this embodiment is that the second functional module 2 includes a coil connection structure 26 for electrically connecting the coil terminal 31 of the third functional module 3 and the coil. Both ends of the coil are respectively connected to the two coil terminals 31 through the coil connection structure 26 to access the control circuit. The control circuit drives the moving iron core to act by controlling the coil, so that the iron core drives the moving contact to contact and separate from the static contact 24 to respectively conduct and disconnect the working circuit accessed by the contact terminal 23.

[0055] In the contactor of this embodiment, by providing a coil connection structure 26 for electrically connecting the coil terminal 31 and the coil in the second functional module 2 and integrating the coil terminal 31 into the third functional module 3 at the top, not only is the layout more reasonable, but also the wiring and operation are more convenient.

[0056] In addition, by providing an auxiliary module in the third functional module 3, the coil terminal 31 and the auxiliary module can be integrated together, making the wiring and operation of the third functional module 3 at the top more convenient and giving customers better recognition during use.

[0057] Furthermore, the two coil connection terminals 31 are respectively located directly above the two connection positions of the coil. The coil connection terminals 31 are set in the third functional module 3 so that the coil connection terminals 31 can be located directly above the connection positions of the coil, which is convenient for wiring.

[0058] Furthermore, the coil connection structure 26 is located between the outer side of the base 21 and the inner side of the cover 22, and there is no need to set up an additional insulating structure to insulate the coil connection structure 26. Not only can the coil connection structure 26 be insulated from the contact system on the inner side of the base 21, but the cover 22 snapped onto the base 21 can also cover the second conductive member, thereby insulating the coil connection structure 26. Of course, the coil connection structure 26 can also pass through the inside of the base 21, but an insulating structure needs to be added to the outside of the coil connection structure 26. Preferably, the side surface of the base 21 is provided with a coil wiring groove 210, and the coil wiring groove 210 is used to accommodate the coil connection structure 26.

[0059] Furthermore, the coil connection structure 26 includes two first conductive members 261 connected to the two ends of the coil, and two second conductive members 262 connected to the two coil terminals 31. The two first conductive members 261 are connected to the two second conductive members 262. Specifically, the first conductive member 261 includes a clamping spring 263, which includes an elastic contact portion 264 and a connecting portion 265 located on the side of the contact portion 264. The connecting portion 265 is used to connect the coil. The second conductive member 262 is plug-connected to the clamping spring 263, facilitating assembly.

[0060] The coil terminal 31 includes a coil connection piece 311, a coil wire pressing piece 312, and a coil connection screw 313. The coil connection screw 313 passes through the coil wire pressing piece 312 and is connected to the coil connection piece 311. The coil connection screw 313 is used to drive the coil wire pressing piece 312 to press the wire tightly against the coil connection piece 311. The coil connection piece 311 and the corresponding second conductive member 262 are integrally formed, which can reduce the difficulty of assembly and eliminate the process of connecting the second conductive member 262 to the coil terminal 31. Obviously, as other embodiments, the coil connection structure 26 can also adopt a non-plug-in structure, which falls within the scope of protection of the present utility model.

[0061] like Figure 2As shown, the first functional module 1, the second functional module 2, and the third functional module 3 are arranged in sequence along the height direction of the contactor. In the length direction of the contactor, the length of the third functional module 3 is less than that of the second functional module 2, so that screw holes corresponding to the contact terminal 23 are respectively provided at both ends of the top surface of the second functional module 2 in the length direction of the contactor. The third functional module 3 is provided with an interlock module 33. The interlock module 33 is spaced from the two coil terminals 31. In the width direction of the contactor, the interlock module 33 and the two coil terminals 31 are oppositely arranged on both sides of the third functional module 3. Two auxiliary contact modules 34 are provided between the interlock module 33 and the two coil terminals 31.

[0062] For the contactor of this embodiment, on the basis of realizing modularization of functional areas through the first functional module 1, the second functional module 2, and the third functional module 3, the third functional module 3 is also divided into areas according to the functions of different auxiliary modules, so that multiple auxiliary modules can be built into the third functional module 3. In addition, the auxiliary contact module 34 is arranged on the sides of the two coil terminals 31, which is convenient for the installation and connection in series of the externally connected series resistance module. It can be understood that only one of the auxiliary modules can be set, or a combination of multiple auxiliary modules can be set, which all fall within the protection scope of the present invention.

[0063] Further, as Figure 2 、 6 shown, the contact support 25 is provided with a sliding portion 255, and an auxiliary support portion 251 inserted into the third functional module 3 is provided on the sliding portion 255. The auxiliary contact module 34 includes two auxiliary stationary contacts 341 arranged at intervals, and auxiliary connection terminals 342 respectively arranged on the auxiliary stationary contacts 341. The auxiliary support portion 251 is inserted between the two auxiliary stationary contacts 341 of the auxiliary contact module 34. An auxiliary moving contact 343 for electrically connecting with the two auxiliary stationary contacts 341 is provided on the auxiliary support portion 251. When the contact support 25 drives the moving contact to contact and separate from the stationary contact 24, it can simultaneously drive the auxiliary moving contact 343 to move to contact and separate from the auxiliary stationary contact 341, so that the auxiliary contact module 34 switches the output state.

[0064] Further, an auxiliary support groove 252 is provided on the auxiliary support portion 251. On two opposite groove walls of the auxiliary support groove 252, there are respectively provided an auxiliary spring platform 253 (auxiliary contact spring not shown in the figure) for fixing the auxiliary contact spring, and an auxiliary limiting surface 254 for limiting the auxiliary moving contact 343. The auxiliary contact spring is used to push the middle part of the auxiliary moving contact 343, so that the middle part of the auxiliary moving contact 343 is limited by the auxiliary limiting surface 254. Both ends of the auxiliary moving contact 343 extend to both sides of the auxiliary support portion 251. When the auxiliary moving contact 343 contacts the auxiliary static contact 341, the auxiliary contact spring is compressed and pushes the auxiliary moving contact 343, so that the auxiliary moving contact 343 is pressed against the auxiliary static contact 341.

[0065] The contactor of this embodiment has two auxiliary contact modules 34, and the two auxiliary contact modules 34 are respectively normally open contacts and normally closed contacts. On the auxiliary support portion 251, there are provided two auxiliary support grooves 252 corresponding to the two auxiliary contact modules 34 respectively. Auxiliary moving contacts 343 are respectively provided in the two auxiliary support grooves 252. The two auxiliary support grooves 252 are at different heights, so that the two auxiliary moving contacts 343 are at different heights. One of the auxiliary moving contacts 343 contacts the corresponding auxiliary static contact 341 to form a normally closed contact, and the other auxiliary moving contact 343 is separated from the corresponding auxiliary static contact 341 to form a normally open contact. When the auxiliary moving contact 343 of the normally open auxiliary contact contacts the corresponding auxiliary static contact 341, the auxiliary moving contact 343 of the normally closed auxiliary contact is separated from the corresponding auxiliary static contact 341.

[0066] In this way, it is possible to avoid setting the two types of auxiliary contacts, namely normally open contacts and normally closed contacts, at different heights, and thus it is possible to set both normally open and normally closed auxiliary contacts in the third functional module 3 at the same time, which can effectively reduce the height of the third functional module 3. This not only makes the structure of the auxiliary contacts more compact, but also enables the height of the third functional module 3 to meet the dimensional requirements after combination with the first functional module 1 and the second functional module 2. Of course, it can also be achieved by other means. For example, setting the two auxiliary contact modules 34 at different heights will increase the height of the third functional module 3, and all these belong to the protection scope of the present invention. In addition, both of the two auxiliary contact modules 34 can be normally open contacts or both can be normally closed contacts; the contactor can also be provided with one or more auxiliary contact modules 34.

[0067] As Figure 3 shown, the cover 22 is snap-fitted onto the base 21 in the first direction, and the face cover 32 is snap-fitted onto the cover 22 in the second direction, or snap-fitted onto the structure of the base 21 extending outside the cover 22. The first direction and the second direction are perpendicularly arranged, which is not only convenient for assembly, but also the face cover 32 can play a role in limiting the cover 22.

[0068] As Figures 4-5As shown in the figure, the interlock module 33 includes a bracket and an interlock member 331 rotatably arranged on the bracket. The bracket is fixedly arranged inside the housing of the contactor. In this embodiment, the bracket is located in the third functional module 3 at the top of the contactor. The interlock member 331 includes a pivot portion 332 rotatably connected to the bracket, and a first locking portion 333 and a second locking portion 334 oppositely arranged on both sides of the pivot portion 332. The first locking portion 333 extends outside the contactor and is used to insert into an adjacent contactor and cooperate with the contact support 25 of the adjacent contactor. The second locking portion 334 cooperates with the contact support 25 of the contactor where it is located. When one of the contactors and the adjacent contactor is closed, the contact support 25 of the other contactor is locked by the interlock member 331, so that the locked contactor cannot be closed either, preventing the two contactors from being closed simultaneously and realizing the interlock of the two contactors.

[0069] An improvement point of this embodiment is that a surge protection module 35 is provided in the third functional module 3. One ends of the two surge connection structures are respectively connected to the surge protection module 35. The two surge connection structures pass through the second functional module 2 and are respectively connected to both ends of the coil in the first functional module 1, so that the surge protection module 35 is connected in parallel between both ends of the coil.

[0070] For the contactor of this embodiment, by providing two surge connection structures passing through the second functional module 2, the surge protection module 35 and the coil can be arranged in the third functional module 3 and the first functional module 1 on both sides of the second functional module 2. Since the third functional module 3 is located on the topmost side and the surge protection module 35 is arranged in the third functional module 3, it is convenient for installation and disassembly. Moreover, the surge protection module 35 is directly installed in the contactor and does not need to occupy the space outside the contactor.

[0071] As Figure 3 shown, the surge connection structure of this embodiment includes the coil connection structure 26 and the coil terminal 31. The coil terminal 31 and the surge protection module 35 are arranged in the third functional module 3. Both ends of the surge protection module 35 are respectively connected to the two coil terminals 31. The two coil terminals 31 are respectively connected to both ends of the coil through the two coil connection structures 26.

[0072] For the contactor of this embodiment, by the coil connection structure 26 passing through the second functional module 2, the coil terminal 31 can be arranged in the third functional module 3 together with the surge protection module 35, so that the coil terminal 31 can serve two functions of wiring for the coil and connecting the surge protection module 35. It is not only convenient for coil wiring but also convenient for the installation and use of the surge protection module 35.

[0073] It can be understood that a conductive member independent of the coil terminal 31 and the coil connection structure 26 can also be provided, so that the surge protection module 35 is connected to the coil through the conductive member. In addition, the surge protection module 35 may not be connected to the coil terminal 31, and the surge protection module 35 may be directly electrically connected to the coil connection structure 26, which all fall within the protection scope of the present utility model.

[0074] By arranging the surge protection module 35 in the third functional module 3 at the top and arranging two surge connection structures passing through the second functional module 2, and inserting both ends of the surge connection structures into the first functional module 1 and the third functional module 3 respectively, the coil in the first functional module 1 can be connected to the surge protection module 35 in the third functional module 3.

[0075] As Figures 7-8 shown, the surge protection module 35 includes a surge protection unit 351 in the form of an electronic component. The surge protection unit 351 of the electronic component type includes one or more electronic components. That is, the surge protection module 35 of one electronic component is composed of a single diode, a single varistor or other single electronic components, or the surge protection module 35 of multiple electronic components is composed of multiple electronic components such as resistors, capacitors and RC.

[0076] When the surge protection unit 351 is composed of a single diode, a single varistor or other single electronic components, the single diode, the single varistor or other single electronic components can be directly fixed on the contactor, and the two end pins are respectively connected to the two surge connection structures, or directly welded to the coil terminal 31 or the coil connection structure 26 that constitutes the surge connection structure. As Figures 7-8 shown, the surge protection unit 351 is a varistor, the varistor is fixed in the contactor, and the pins at both ends of the varistor are respectively connected to the two coil terminals 31, and welding parts 3110 for welding the varistor pins are respectively provided on the two coil terminals 31.

[0077] When the surge protection unit 351 is composed of multiple electronic components such as resistors, capacitors and RC, the multiple electronic components are assembled together and then installed in the contactor together, and the two end pins are respectively connected to the two surge connection structures, or directly welded to the coil terminal 31 or the coil connection structure 26 that constitutes the surge connection structure. In this way, the surge protection module 35 and the contactor can be integrated into one body, having the characteristics of an integrated structure, and the welding is firm and the cost is low, but the client needs to determine the type of the surge protection module 35 in advance.

[0078] As Figures 9-11As shown, the surge protection module 35 further includes an electronic circuit board 352, and the electronic component type surge protection unit 351 is installed on the electronic circuit board 352, changing the electronic component type surge protection unit 351 to the electronic circuit board 352 type.

[0079] As Figures 9-11 Fig. 1 shows a first embodiment of the surge protection module 35. The electronic circuit board 352 includes a support trace area 3521 in the middle, and two electrical connection areas 3522 oppositely arranged on both sides of the support trace area 3521. The surge protection unit 351 is provided on the support trace area 3521. The support trace area 3521 is used to be inserted between two coil connection terminals 31. Exposed conductive layers are respectively provided on the surfaces of one side of the two electrical connection areas 3522. The conductive layers are used to electrically connect the coil connection terminals 31. The coil connection terminals 31 are provided with two connecting rods 3111 respectively connected to the coil connection pieces 311. Clamping protrusions 3112 protruding towards each other are respectively provided on the two connecting rods 3111. The two electrical connection areas 3522 are used to be respectively inserted between the two connecting rods 3111 of the coil connection terminals 31 on both sides. The clamping protrusions 3112 on the two connecting rods 3111 respectively limit the electrical connection areas 3522 from both sides and are electrically connected to the conductive layers on the electrical connection areas 3522. The surge protection unit 351 is electrically connected to the coil connection terminals 31 through the conductive layers.

[0080] By providing the electronic circuit board 352 and installing the surge protection unit 351 on the electronic circuit board 352, since the installation and disassembly are both very convenient, the corresponding type of surge protection module 35 can be selected according to needs. If it is necessary to replace other types of surge protection modules 35, it is also convenient for customers to operate.

[0081] Of course, the connecting rods 3111 may not be provided with the clamping protrusions 3112, and the electrical connection areas 3522 can be directly inserted between the two connecting rods 3111 and contact the connecting rods 3111, which all fall within the protection scope of the present invention.

[0082] As Figures 12-13 Fig. 2 shows a second embodiment of the surge protection module 35. The electrical connection area 3522 of the electronic circuit board 352 is provided with a spring piece 3523. Between the electrical connection area 3522 and the two connecting rods 3111, the spring piece 3523 is used to limit and electrically connect with the connecting rods 3111. The clamping protrusions 3112 can also be provided on the two connecting rods 3111 in this embodiment. The clamping protrusions 3112 can limit the spring piece 3523 longitudinally to prevent the electrical connection area 3522 from leaving longitudinally. In addition, only one of the two connecting rods 3111 may be provided with the clamping protrusions 3112, that is, at least one of the connecting rods 3111 is provided with a clamping boss protruding towards the other connecting rod, which all fall within the protection scope of the present invention.

[0083] like Figures 14-15 The first embodiment of the cover 32 is shown. The cover 32 of this embodiment is an integrated structure. The cover 32 completely covers the surge protection module 35. The surge protection module 35 can be marked on the cover 32. The cover 32 needs to be removed before the surge protection module 35 can be installed or removed. The characteristics of this embodiment are good sealing and high reliability.

[0084] like Figure 15 A second embodiment of the face cover 32 is shown. The face cover 32 of this embodiment is a split structure. A sealing hole 322 for passing the surge protection module 35 and a sealing plug 321 for detachably installing into the sealing hole 322 are provided on the face cover 32. To install and remove the surge protection module 35, it is only necessary to open the sealing plug 321 without removing the face cover 32, which is convenient for customers to operate. The contactor and surge protection module 35 can be purchased separately.

[0085] Furthermore, the sealing plug 321 is provided with a limiting structure 353 for limiting the electronic circuit board 352. The electronic circuit board 352 is installed on the sealing plug 321 through the limiting structure 353, and then installed on the face cover 32 together with the sealing plug 321. During the process of installing the sealing plug 321 to the face cover 32, the electronic circuit board 352 is driven to connect with the surge connection structure through the sealing plug 321, which can eliminate the step of driving the installation of the surge protection module and reduce the difficulty of assembly.

[0086] Specifically, the sealing plug 321 is provided with two limiting structures 353, and the two limiting structures 353 are respectively provided with two opposite limiting rods 354, and a limiting buckle 355 is arranged between the two limiting rods 354 and away from the other limiting structure 353. The limiting buckle 355 and the two limiting rods 354 form a U-shaped limiting groove, and the electrical connection area 3522 of the electronic circuit board 352 can be inserted into the limiting groove. A limiting slot 3524 for snapping the limiting buckle 355 is provided in the electrical connection area 3522.

[0087] Furthermore, the sealing plug 321 includes a first sealing plate 3211 and a second sealing plate 3212 provided on one side of the first sealing plate 3211 along the width direction. The length of the second sealing plate 3212 is shorter than that of the first sealing plate 3211. The first sealing plate 3211 is provided with a first clip 3213 protruding in the height direction at both ends of the side along the length direction away from the second sealing plate 3212. The second sealing plate 3212 is provided with a second clip 3214 protruding in the height direction on both sides opposite to each other in the length direction. The first clip 3213 and the second clip 3214 are respectively used to be inserted into the inner side of the face cover 32. The first clip 3213 and the second clip 3214 are respectively clamped on the inner side wall of the face cover 32 and are limitedly matched along the limit height direction.

[0088] The cover 22 is buckled on the top side of the base 21. After the electronic circuit board 352 is installed in place, one side edge of the electronic circuit board 352 contacts the top side of the base 21, and the opposite side edge abuts against the first sealing plate 3211 to limit the first sealing plate 3211 in the height direction.

[0089] As Figure 18 shown, the face cover 32 is provided with two opposite first side plates 323 and two second side plates 324 located between the two first side plates 323. A space for accommodating the support wiring area 3521 is formed between the two second side plates 324. The two second side plates 324 and the two first side plates 323 are respectively arranged at intervals, and a face cover jack 325 is formed between the second side plate 324 and the first side plate 323. The connecting rod 3111 of the coil terminal 31 is used to be inserted into the face cover jack 325. A face cover slot 326 is provided on the second side plate 324. When the electronic circuit board 352 is installed, the electrical connection area 3522 is driven to be inserted into the face cover slot 326, and the electrical connection area 3522 is in sliding fit with the face cover slot 326, which can play a role in guiding the installation of the electronic circuit board 352.

[0090] It should be noted that in the description of the present invention, the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which it is usually placed during use. It is only for the convenience of description and does not indicate that the device or element referred to must have a specific orientation. Therefore, it should not be construed as a limitation of the present invention. In addition, the terms "first", "second", "third", etc. are only used for distinguishing descriptions and cannot be understood as indicating relative importance.

[0091] The above content is a further detailed description of the present invention in combination with specific preferred embodiments. It cannot be determined that the specific implementation of the present invention is only limited to these descriptions. For those of ordinary skill in the technical field to which the present invention belongs, without departing from the concept of the present invention, several simple deductions or substitutions can be made, and all should be regarded as belonging to the protection scope of the present invention.

Claims

1. A contactor, comprising a first functional module (1), a second functional module (2) and a third functional module (3), wherein the second functional module (2) is arranged between the first functional module (1) and the third functional module (3). The first functional module (1) is provided with a coil of an electromagnetic system, and the electromagnetic system includes a moving iron core and a coil for driving the moving iron core to move. The second functional module (2) includes a contact system and a contact terminal (23). The contact system includes a static contact (24) and a moving contact. The moving contact is installed on a contact support (25) driven by the electromagnetic system. The moving iron core of the electromagnetic system is connected to the contact support (25). The static contact (24) is connected to a working circuit through the contact terminal (23). It is characterized in that: A surge protection module (35) is provided in the third functional module (3). One end of the surge protection module (35) is respectively connected to one end of two surge connection structures. The two surge connection structures pass through the second functional module (2) and are respectively connected to both ends of the coil in the first functional module (1), so that the surge protection module (35) is connected in parallel between both ends of the coil.

2. The contactor according to claim 1, characterized in that: The surge connection structure includes a coil connection structure (26). The coil connection structure (26) is arranged in the second functional module (2). The coil connection structure (26) is electrically connected to the coil. The surge protection module (35) is electrically connected to the coil connection structure (26).

3. The contactor according to claim 2, characterized in that: The surge connection structure further includes a coil terminal (31). The coil terminal (31) is arranged in the third functional module (3). The coil terminal (31) is used for connecting a wire. The coil connection structure (26) is used for electrically connecting the coil terminal (31) and the coil. The surge protection module (35) is electrically connected to the coil terminal (31).

4. The contactor according to claim 3, characterized in that: The surge protection module (35) includes a surge protection unit (351). The surge protection unit (351) includes one electronic component or multiple electronic components. Both ends of the surge protection unit (351) are respectively connected to two coil terminals (31).

5. The contactor according to claim 4, characterized in that: The surge protection unit (351) includes a varistor. The varistor is fixed in the contactor. The pins at both ends of the varistor are respectively connected to two coil terminals (31).

6. The contactor according to claim 4, characterized in that: The surge protection module (35) further includes an electronic circuit board (352). The surge protection unit (351) is installed on the electronic circuit board (352).

7. The contactor according to claim 6, wherein: The electronic circuit board (352) includes a support wiring area (3521) and two electrical connection areas (3522) oppositely arranged on both sides of the support wiring area (3521). The surge protection unit (351) is provided on the support wiring area (3521). The support wiring area (3521) is used for being inserted between two coil terminals (31). Conductive layers are respectively provided on the surfaces of one side of the two electrical connection areas (3522). The conductive layers are used for electrically connecting the coil terminals (31).

8. The contactor according to claim 7, characterized in that: The coil terminal (31) includes a coil connection piece (311), a coil pressure piece (312) and a coil connection screw (313), and two connecting rods (3111) respectively connected to the coil connection piece (311). The coil connection screw (313) passes through the coil pressure piece (312) and is connected to the coil connection piece (311). The coil connection screw (313) is used to drive the coil pressure piece (312) to press the wire tightly on the coil connection piece (311). The two electrical connection areas (3522) are used to be inserted between the two connecting rods (3111) of the coil terminals (31) on both sides respectively.

9. The contactor according to claim 8, characterized in that: At least one of the connecting rods (3111) is provided with a clamping boss protruding towards the other connecting rod (3111), and the clamping boss is used to limit the electrical connection area (3522).

10. The contactor according to claim 8, characterized in that: The electrical connection area (3522) is provided with a spring piece (3523). Between the electrical connection area (3522) and the two connecting rods (3111), the spring piece (3523) is used to be limited and electrically connected to the connecting rods (3111).

11. The contactor according to claim 8, wherein: The third functional module (3) includes a face cover (32). The face cover (32) is provided with a sealing hole (322) for passing through the surge protection module (35), and a sealing plug (321) for detachably installing into the sealing hole (322).

12. The contactor according to claim 11, characterized in that: The sealing plug (321) is provided with a limiting structure (353) for limiting the electronic circuit board (352). The electronic circuit board (352) is installed on the sealing plug (321) through the limiting structure (353). During the process of installing the sealing plug (321) onto the face cover (32), the electronic circuit board (352) is driven by the sealing plug (321) to insert the electrical connection area (3522) between the two connecting rods (3111).

13. The contactor according to claim 12, wherein: The sealing plug (321) is provided with two limiting structures (353). The two limiting structures (353) are respectively provided with two opposite limiting rods (354), and a limiting buckle (355) arranged on the side away from the other limiting structure (353) between the two limiting rods (354). The limiting buckle (355) and the two limiting rods (354) form a U-shaped limiting groove. The electrical connection area (3522) of the electronic circuit board (352) can be inserted into the limiting groove, and a limiting slot (3524) for clamping into the limiting buckle (355) is provided in the electrical connection area (3522).

14. The contactor according to claim 11, wherein: The sealing plug (321) includes a first sealing plate (3211) and a second sealing plate (3212) arranged on one side of the first sealing plate (3211) along the width direction. The length of the second sealing plate (3212) is less than that of the first sealing plate (3211). At both ends of the side edge of the first sealing plate (3211) away from the second sealing plate (3212) along the length direction, first buckles (3213) protruding along the height direction are respectively provided. On the two side edges of the second sealing plate (3212) opposite to each other along the length direction, second buckles (3214) protruding along the height direction are respectively provided. The first buckles (3213) and the second buckles (3214) are respectively used to be inserted into the inner side of the face cover (32), and the first buckles (3213) and the second buckles (3214) are respectively clamped on the inner side wall of the face cover (32) and are in limit cooperation along the limit height direction.

15. The contactor according to claim 14, characterized in that: The second functional module (2) includes a base (21) and a cover (22) sleeved outside the base (21). The cover (22) is buckled on the top side of the base (21). After the electronic circuit board (352) is installed in place, one side edge of the electronic circuit board (352) contacts the top side of the base (21), and the opposite side edge abuts against the first sealing plate (3211) for limiting the first sealing plate (3211) along the height direction.

16. The contactor according to claim 11, wherein: The face cover (32) is provided with two opposite first side plates (323) and two second side plates (324) located between the two first side plates (323). A space for accommodating the support wiring area (3521) is formed between the two second side plates (324). The two second side plates (324) and the two first side plates (323) are respectively arranged at intervals, and a face cover jack (325) is formed between the second side plate (324) and the first side plate (323). The connecting rod (3111) of the coil terminal (31) is used to be inserted into the face cover jack (325). A face cover slot (326) is provided on the second side plate (324). When the electronic circuit board (352) is installed, it drives the electrical connection area (3522) to be inserted into the face cover slot (326) and makes the electrical connection area (3522) and the face cover slot (326) in sliding fit.

17. The contactor according to claim 2, wherein: The second functional module (2) includes a base (21) and a cover (22) sleeved outside the base (21). The contact system is arranged inside the base (21), and the coil connection structure (26) is located between the outside of the base (21) and the inside of the cover (22).

18. The contactor according to claim 17, wherein: The side surface of the base (21) is provided with a coil wiring groove (210), and the coil wiring groove (210) is used to accommodate the coil connection structure (26).

Images