Contactor

Abstract

The present invention discloses a contactor, which includes a housing, an arc ignition device, a wiring device, an electromagnetic drive device, a contact device, a control module, and a protection module. The housing includes a base, a middle shell, and an upper cover. A middle mounting hole and a side mounting hole are provided at the upper end of the middle shell. The electromagnetic drive device includes a yoke, and a plurality of support blocks are provided on the upper side of the yoke. A first slot is provided at the upper side of the side of the middle mounting hole. The control module or the protection module includes a circuit board. Second slots are correspondingly provided on the inner walls on both sides of the side mounting hole. Rubber connectors are provided on both sides of the circuit board. Third slots are provided on the inner walls on both sides of the side mounting hole. The present invention can load various modules according to actual needs, and has the advantages of fast make-break speed, short arcing time, strong ability to make and break high voltage and large current, long mechanical and electrical life, energy saving and noise reduction, compact structure, small volume, and saving installation space.

Description

Technical Field

[0001] The present invention relates to a contactor. Background Art

[0002] For the existing series of contactor products on the market, in order to achieve control and protection functions, the contactor products are usually connected and coordinated with protection electrical appliances such as thermal relays and motor protectors. However, these products are independently installed, with a relatively large overall volume and occupying a lot of installation space. Later, a contactor integrated with control and protection functions emerged. For example, a contactor with an integrated electronic protector function and structure in a Chinese invention patent (CN103107507B) precisely solved the defects brought about by the independent installation of contactor products and protection electrical appliances in the traditional technology, and proposed a new integration solution. For example, the contactor products of the Schneider TeSys Giga series also provide a contactor product with control and protection functions.

[0003] Although the existing contactors with control and protection functions integrate the protection module into the contactor products, the utilization rate of the internal space of the traditional contactor is not high, resulting in a larger volume of the contactor products than before and having certain requirements for the installation environment.

[0004] Contactors with control and protection functions usually have a secondary current monitoring function, which includes a current monitoring module. The current monitoring module generally includes components such as a current transformer and a circuit board with a processing chip. A contactor (CN209487421U) disclosed in a Chinese invention includes an upper housing, and a current transformer is provided on the upper housing. The contactor further includes a microprocessor provided on the side wall of the single-pole contactor. The current transformer is connected to the microprocessor. The current transformer detects the current in the main circuit and feeds back the signal to the microprocessor, and the microprocessor is used to analyze and process the input current signal. In this patent, both the microprocessor and the current transformer of the current monitoring module are provided outside the housing, with an overall unattractive appearance and an insufficiently compact structure, and the internal space of the housing is not reasonably utilized. In addition, this current transformer needs to be used in cooperation with a conductor passing through the center, and the assembly is relatively inconvenient.

[0005] The arc-strike device is a common component on the contactor, which is used to introduce the arc generated during disconnection into the arc-extinguishing chamber. In an AC contactor contact arc-extinguishing device (CN2415444Y) disclosed in a Chinese invention patent, it includes a cover plate and an arc-extinguishing cover, which form an arc-extinguishing chamber, and an arc-strike plate is correspondingly arranged above the moving contact bridge, and there are longitudinal grids and transverse grids arranged longitudinally on both sides of the arc-strike plate. The arc-strike plate is fixed to the static contact bridge by screws facing the contact. When the moving contact bridge and the static contact bridge are disconnected, an arc is generated between the contacts. This arc is quickly pulled out from between the contacts under the action of the arc-strike plate and the transverse grid, and is sucked into the longitudinal grid and divided into many short arcs. When the circuit passes zero in the circuit, the arc will be easily extinguished, and the arc and free gas are cooled through the longitudinal grid, the transverse grid and the narrow gap to achieve circuit disconnection.

[0006] The arc striking device used for contactor in the prior art has the following defects:

[0007] (1) The static contact bridge (i.e., conductive sheet) and the contactor housing are fixedly installed. When the contactor is closed, the static contact bridge will be subjected to a large impact force. Long-term use may easily cause the connection between the static contact bridge and the housing to loosen, or even cause deformation and damage to the static contact bridge, affecting the reliability and service life of the product;

[0008] (2) The fit between the static contact bridge and the transverse grid (i.e., arc striking piece) is not tight, and the arc striking effect needs to be improved;

[0009] (3) There is a lack of magnetic conductive materials around the static contact bridge that can enhance the magnetic blowing force, so the magnetic blowing force is weak, affecting the speed of arc movement.

[0010] The wiring device is a common component on the contactor, which is used to connect and fix with the wire and form an electrical connection between the contactor and the wire. The wiring device of the existing contactor products usually includes a wiring slot, a wiring terminal inserted in the wiring slot, a through hole is provided on the wiring terminal, a wiring block is provided in the wiring slot, and a screw hole is provided on the wiring block. When wiring, the screw is passed through the through hole of the wiring terminal, the copper ring at the end of the wire, and the screw hole on the wiring block in turn to lock the connection, and the copper ring is pressed and contacted on the wiring terminal and the wiring block by the screw, so as to achieve reliable fixation of the wire and form a stable electrical connection.

[0011] A similar structure is disclosed in the Chinese invention patent application nut retaining assembly (CN115302450A), which includes a nut and a nut retaining member (equivalent to the terminal block) that cooperates with the nut and is fixed thereto. The nut retaining member includes a connecting portion, on which a first clamping portion is provided, and the first clamping portion can be clamped and fixed with a second clamping portion on the housing.

[0012] The wiring device in the above-mentioned prior art has the following defects: The wiring block and the wiring groove are fixedly connected. Due to the machining precision error, the size of the through hole on the wiring terminal is usually designed to be larger than the size of the screw, which leads to the problem that the screw and the screw hole on the wiring block are prone to misalignment, and the position of the wiring block cannot be adjusted, resulting in inconvenient wiring operation.

[0013] The electromagnetic system in the contactor consists of an iron core and a coil. During the closing process of the AC contactor, the armature in the iron core moves towards the yoke direction, and at the same time, the yoke also moves towards the armature direction to meet. If the yoke is not fixed and limited, the displacement generated by the yoke will hit the coil. As the number of closing times increases, the yoke is prone to shaking, and the long-term rigid impact between the yoke and the coil will also cause the coil to fail. A mounting structure for the yoke of an AC contactor (CN205388959U) is disclosed in a Chinese invention, which includes a base and a yoke. The yoke is installed in the base through a yoke mounting member. The yoke mounting member is provided with a yoke mounting groove for installing the yoke, and the yoke mounting member is connected and installed on the bottom surface of the base. A coil bobbin and an armature are also provided in the base. The top and bottom of the coil bobbin are respectively arranged opposite to the armature and the yoke. The yoke mounting member is placed between the coil bobbin and the bottom surface of the base. The armature can move towards the yoke installed in the yoke mounting groove to be magnetically attracted and connected to the yoke when the AC contactor operates.

[0014] In the above patent solution, by configuring a yoke mounting member on the base and installing the yoke in the base through the yoke, the simple positioning and installation of the yoke and the base are realized, the number of parts required in the assembly process of the yoke and the base is reduced, the assembly efficiency of the yoke is improved, and at the same time, the firmness of the positioning and assembly structure is ensured, and the stability of the closing process of the AC contactor is improved. However, the setting of the yoke mounting member actually still increases the number of components, correspondingly increases the complexity of the contactor product structure and the difficulty of installation, and the shock absorption and anti-impact effect also needs to be improved.

[0015] In addition, a circuit board is usually configured in the contactor. The circuit board is arranged in the base of the contactor and is fixedly connected to the base by means of screws, buckles or glue, etc. For example, a Chinese invention patent application for a circuit board mounting structure and a contactor (CN112599385A) discloses a similar mounting structure.

[0016] The mounting structure of the circuit board of the traditional contactor has high requirements for the matching precision between components. If the precision error is large, it is easy to cause unreliable installation of the circuit board and easy to generate shaking. In addition, there is a lack of a reliable shock absorption structure. Under the impact of the contactor armature closing, it is easy to cause damage to the connection structure between the circuit board and the base, and even cause the circuit board to fall off, and it also has a certain impact on the service life of the circuit board.

[0017] Traditional contactors usually include a housing, inside which a contact support is movably arranged. A iron core is connected to the contact support. The iron core is usually connected and cooperated with the contact support through fasteners such as screws. Referring to a contact support device of an AC contactor (CN216902703U) disclosed in a Chinese invention patent, in this patent, after the contact support and the iron core are connected, a pressure plate is used to fix the iron core, and screws are also required to connect between the pressure plate and the contact support. This traditional installation structure is relatively complex and brings a lot of inconvenience to assembly. There is a possibility that the screws fall off after the contactor is continuously attracted and used for a long time. In addition, the function of the traditional contact support is single, generally only playing the role of fixing the contacts and the iron core. However, contactor products usually also have functions such as interlock function and status indication function. The realization of these functions requires the linkage and cooperation of other components, resulting in a complex overall structure of the contactor product.

[0018] Traditional contactors usually include an electromagnetic driving device, which can drive the armature to attract, so as to realize the electrical connection of the moving and static contacts. A spring is also included and cooperates with the electromagnetic driving device. The spring is used to realize the reset movement, so that the moving and static contacts can be quickly separated. The spring is usually arranged between the contact support and the housing of the contactor. For example, by setting protrusions or jacks on the contact support and the housing that are positioned and cooperated with both ends of the spring, the spring is fixed to ensure the stability of the acting force direction of the spring. However, in order to ensure uniform and stable force, multiple springs are usually arranged between the contact support and the housing, and the multiple springs are distributed around the contact support. When installing the multiple springs, it is necessary to ensure that both ends of the spring are aligned and installed with the positioning structures on the contact support and the housing respectively, and at the same time, it is necessary to ensure that the spring has a certain pre-tightening force, which is very inconvenient for the installation operation of the spring. For example, a similar spring installation structure is disclosed in a Chinese invention patent for a household contactor (CN213150676U). Summary of the Invention

[0019] Aiming at the deficiencies of the above-mentioned prior art, the present invention provides a contactor with a simple, compact structure, convenient installation, low working noise and long service life.

[0020] To achieve the above object, the present invention provides a contactor, which includes a housing, an arc ignition device, a wiring device, an electromagnetic driving device, a contact device, a control module, and a protection module provided on the housing. The housing includes a base, a middle shell, and an upper cover. An intermediate mounting hole and two side mounting holes are provided at the upper end of the middle shell. The intermediate mounting hole is located in the middle of the middle shell and is used for accommodating and mounting the electromagnetic driving device. The two side mounting holes are respectively located on both sides of the intermediate mounting hole and are respectively used for accommodating and mounting the control module and the protection module. The upper cover is used to cooperate with the upper ends of the intermediate mounting hole and the side mounting holes to close. The electromagnetic driving device includes a yoke provided in the intermediate mounting hole. A plurality of support blocks are provided on the upper side of the yoke. The support block includes a first connecting rod fixedly connected to the yoke and a rubber pad provided outside the first connecting rod. A plurality of first slots for fitting and positioning in cooperation with the support blocks are provided at the upper side of the side of the intermediate mounting hole. The insertion direction of the support block relative to the first slot and the insertion direction of the yoke relative to the intermediate mounting hole are the same. The control module or the protection module includes a circuit board. Second slots for plugging and cooperating with the two side edges of the circuit board are correspondingly provided on the inner walls of both sides of the side mounting hole. Rubber connectors are also provided on both sides of the circuit board. Third slots for plugging and cooperating with the rubber connectors are provided on the inner walls of both sides of the side mounting hole. The insertion direction of the circuit board and the side mounting hole and the insertion direction of the rubber connector and the third slot are the same.

[0021] Further, fourth slots for plugging and cooperating with both sides of the yoke are provided on two opposite side walls of the intermediate mounting hole. The first slots are provided at the upper ends of the two opposite side walls of the two fourth slots. Two support blocks are correspondingly provided on each side of the yoke. The first slot includes an insertion port at the upper end of the intermediate mounting hole, a first support wall at the bottom, and guiding walls distributed on both sides of the first support wall. First protrusions for limiting or clamping and positioning in cooperation with the support block are provided on the guiding walls. The rubber pad is cylindrical. The first support wall includes an arc-shaped groove.

[0022] Further, the second slot is correspondingly connected to the lower end of the third slot. The upper end of the third slot has an insertion port. The rubber connectors are provided on the upper parts of the two side edges of the circuit board. The second slot and the third slot are connected through a connecting slot. The width of the connecting slot is gradually narrowed from top to bottom. The lower end of the third slot has an inclined limiting wall. A blocking wall is provided at the lower end of the second slot.

[0023] Further, second protrusions are provided at the upper parts of both side edges of the circuit board. The rubber connector includes insertion holes that are matched and inserted with the second protrusions. The second protrusions are horizontally inserted into the insertion holes of the rubber connector. Notch openings are provided at the upper parts of both side edges of the circuit board. The second protrusions are formed between the top ends and the notch openings of both side edges of the circuit board. The notch openings are fitted and installed in cooperation with the rubber connector.

[0024] Further, the arc ignition device includes a conductive sheet and an arc ignition sheet disposed between the base and the middle shell. The conductive sheet includes a first horizontal section, a second horizontal section, and a vertical section connected between one end of the first horizontal section and one end of the second horizontal section, which are horizontally and parallelly distributed along the longitudinal direction. The first horizontal section is located above the second horizontal section. A receiving groove is formed at an interval between one end of the first horizontal section and one end of the second horizontal section. One end of the arc ignition sheet includes a supporting portion inserted into the receiving groove. The upper and lower ends of the supporting portion respectively form a supporting fit with the first horizontal section and the second horizontal section. The other end of the arc ignition sheet includes an arc extinguishing sheet extending longitudinally. The arc ignition sheet and the arc extinguishing sheet are integrally connected through an arc-shaped connecting section. A notch for dividing the electric arc is provided at a position of one end of the arc ignition sheet corresponding to the position between one end of the second horizontal section and the lower end of the second horizontal section.

[0025] Further, the wiring device includes a wiring groove provided on the side of the housing and a wiring terminal provided in the wiring groove. A wiring hole is provided on the wiring terminal. A wiring block is further provided in the wiring groove. The wiring block is correspondingly disposed above or below the wiring terminal. A screw hole is provided on the wiring block. The two sides of the wiring block form a guiding and movable fit with the two side walls of the wiring groove. A limiting structure is provided between the wiring block and the two relatively disposed side walls of the wiring groove. The limiting structure is used to limit that the wiring block can only move up and down within a limited distance in a direction approaching or departing from the wiring terminal, and can also limit the wiring block to move within a limited distance in a direction approaching or departing from the notch of the wiring groove. When the wiring is tightened, the two side walls of the wiring groove also have the function of restricting the rotation of the wiring block. Therefore, a wrench is not required to fix the wiring block when tightening the screw, and the wiring operation is relatively convenient.

[0026] Furthermore, the limiting structure includes a limiting portion arranged on at least one side wall of the wiring slot, the limiting portion is located on a side of the wiring block opposite to the wiring terminal, the limiting structure also includes a guide slot arranged in the wiring slot, and movable blocks movably connected with the guide slot are arranged on both sides of the wiring block, the movable block can move along the up and down directions of the guide slot and in a direction approaching or moving away from the notch of the wiring slot, and one end of the guide slot corresponding to the notch direction of the wiring slot cooperates with the movable block for limiting, the two movable blocks of the wiring block are connected to the main body of the wiring block by an elastic connecting portion, and one end of the guide slot corresponding to the notch direction of the wiring slot is provided with a wedge-shaped slot, the movable block is wedge-shaped, and the movable block cooperates with the wedge-shaped slot for limiting.

[0027] Further, the contact device includes a contact bracket movably arranged in the middle mounting hole, a spring arranged between the contact bracket and the middle shell, the electromagnetic drive device includes an iron core, the iron core is arranged at the upper end of the contact bracket, the iron core includes a connecting hole running through both sides thereof, a second connecting rod is passed through the connecting hole, a connecting member is respectively arranged on both sides of the contact bracket, the connecting member and the two sides of the contact bracket and the two ends of the second connecting rod form a transverse plug-in positioning match, the outer side of the connecting member has a sliding connection part, the side wall of the middle mounting hole is provided with a sliding groove slidably connected with the sliding connection part, the upper end of the connecting member is provided with a status indicating part, the upper end of the contact bracket is provided with a notch, the lower end of the iron core is inserted in the notch, the side of the connecting member is provided with an interlocking hole, and the side of the connecting member is provided with an auxiliary contact interface.

[0028] Further, the contact device includes a contact bracket movably arranged in the middle mounting hole, the contact bracket includes a support platform, and a plurality of first insertion and positioning portions for cooperating with one end of the spring are distributed on the support platform, and a plurality of spring grooves for cooperating with the other end of the spring are arranged around the middle mounting hole, and the spring groove has a socket at one end corresponding to the support platform, and a mounting port connected to the outside of the spring groove is arranged on the side of the other end of the spring groove, and a second support wall for cooperating with the other end of the spring is arranged at the other end.

[0029] Furthermore, the protection module includes a secondary current monitoring element installed in the side mounting hole, a horizontal partition wall is included between the middle shell and the base, a conductive sheet is provided at the lower part of the partition wall, and an embedding opening is penetrated at the upper part of the partition wall at the position corresponding to the conductive sheet, and the secondary current monitoring element is embedded and fixed in the embedding opening and cooperates with the conductive sheet for monitoring.

[0030] The beneficial effects of the present invention are as follows: Compared with the prior art, the contactor product of the present invention not only has a simple and compact structure, but also is relatively convenient to install. Components such as the yoke and circuit board inside the housing can better resist the vibration and impact generated during suction, reduce the noise and vibration during operation, and improve the service life of the product. In addition, it can also reduce the requirements for processing and assembly accuracy and improve the installation and matching effect with the housing. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 is a structural diagram of an embodiment of the present invention;

[0032] Figure 2 is a cross-sectional view of an embodiment of the present invention Figure 1 ;

[0033] Figure 3 is a structural diagram of the arc ignition device of an embodiment of the present invention;

[0034] Figure 4 is a cross-sectional view of the arc ignition device of an embodiment of the present invention;

[0035] Figure 5 is an exploded view of the arc ignition device of an embodiment of the present invention;

[0036] Figure 6 is a structural diagram of the wiring device of an embodiment of the present invention;

[0037] Figure 7 is a cross-sectional view of the wiring device of an embodiment of the present invention Figure 1 ;

[0038] Figure 8 is a cross-sectional view of the wiring device of an embodiment of the present invention Figure 2 ;

[0039] Figure 9 is the structure of the wiring block of an embodiment of the present invention Figure 1 ;

[0040] Figure 10 is the structure of the wiring block of an embodiment of the present invention Figure 2 ;

[0041] Figure 11 is the installation schematic diagram of the electromagnetic drive device of an embodiment of the present invention Figure 1 ;

[0042] Figure 12 is the installation schematic diagram of the electromagnetic drive device in a cross-sectional state of an embodiment of the present invention Figure 1 ;

[0043] Figure 13 is the installation schematic diagram of the electromagnetic drive device in a cross-sectional state of an embodiment of the present invention Figure 2 ;

[0044] Figure 14 Schematic diagram for disassembling the circuit board according to an embodiment of the present invention;

[0045] Figure 15 Schematic diagram of the structure of the circuit board according to an embodiment of the present invention;

[0046] Figure 16 Schematic diagram of the second slot and the third slot according to an embodiment of the present invention;

[0047] Figure 17 Schematic diagram for installing the connecting member according to an embodiment of the present invention;

[0048] Figure 18 Schematic diagram for disassembling the connecting member according to an embodiment of the present invention;

[0049] Figure 19 Schematic diagram for disassembling the spring according to an embodiment of the present invention;

[0050] Figure 20 Schematic diagram for installing the spring in a sectional view according to an embodiment of the present invention. Detailed implementation manners

[0051] An embodiment of the contactor of the present invention is as Figures 1 - 20 shown, and includes a housing, an arc ignition device, a wiring device, an electromagnetic driving device, a contact device, a control module, and a protection module provided on the housing. The housing includes a base 110, a middle shell 120, and an upper cover. A middle mounting hole 121 and two side mounting holes are provided at the upper end of the middle shell 120. The two side mounting holes are respectively a first and a second side mounting hole (122 and 123 respectively). The middle mounting hole 121 is located in the middle of the middle shell 120 and is used to accommodate and install the electromagnetic driving device and the contact device. The two side mounting holes are respectively located on both sides of the middle mounting hole 120. The first side mounting hole 122 is used to accommodate and install the control module for realizing the most basic electromagnetic on-off function of the contactor, and the second side mounting hole 123 is used to accommodate and install the protection module for protection functions such as load fault protection. The upper cover includes a first upper cover 131 and a second upper cover 132. The first upper cover 131 is used to cooperate and close with the upper ends of the first side mounting hole 122 and the middle mounting hole 121, and the second upper cover 132 is used to cooperate and close with the upper end of the second side mounting hole 123. In other embodiments, the first upper cover 131 can also be two, and respectively cooperate and close with the upper ends of the first side mounting hole 122 and the middle mounting hole 121.

[0052] As Figure 1As shown in the figure, in this embodiment, a control panel 1321 is provided at the upper end of the second upper cover 132. The control panel 1321 is used to adjust the triggering conditions of the protection module from the outside of the contactor, so that the contactor product of the present invention can be applied to motors with different loads. A test button 1322 is also provided at the upper end of the second upper cover 132. At the position of the first side mounting hole 122 on the first upper cover 131, a terminal block mounting hole 1311 for the terminal block to pass through is provided. The setting of the terminal block mounting hole 1311 facilitates the transmission connection of signals.

[0053] Through the above structural design, the internal space of the contactor housing is reasonably utilized, and the overall structure is compact. It not only has the electromagnetic on-off function of a conventional contactor, but also adds a protection module, which can realize functions such as load fault protection, and has little impact on the volume of existing contactor products. The control module, protection module, electromagnetic drive device, contact device, etc. are relatively independent and will not interfere with each other. In addition, the contactor can be equipped with a motor protection module, adding multiple motor protections such as overload, locked rotor, open phase, phase imbalance, phase sequence, over- and under-voltage, as well as its fault recording and display functions, and also has multiple communication functions, life cycle recording, and life prediction functions. All derived function modules are located on the front of the product for operation, making use and maintenance convenient and fast.

[0054] As Figures 11 - 13 shown, the electromagnetic drive device includes a yoke 210 disposed in the middle mounting hole 121. At the upper side of the yoke 210, a plurality of support blocks 220 are provided. The support blocks 220 include a first connecting rod 221 fixedly connected and cooperating with the yoke 210, and a rubber pad 222 disposed outside the first connecting rod 221. At the upper side of the side of the middle mounting hole 121, a plurality of first slots 1211 are provided for cooperating with and positioning the support blocks 220. The insertion direction of the support blocks 220 relative to the first slots 1211 is the same as the insertion direction of the yoke relative to the middle mounting hole.

[0055] During installation, the yoke 210 and the support blocks 220 can be simultaneously inserted into the middle mounting hole 121 and the first slots 1211 respectively, which is convenient for installation. The first slots 1211 and the middle shell 120 are integrally injection-molded. When the yoke 210 and the support blocks 220 are installed in place, the upper cover is installed on the upper end of the middle shell 120. The upper cover can close the upper ends of the middle mounting hole 121 and the first slots 1211, which can play a limiting role and prevent the yoke 210 and the support blocks 220 from coming out of the middle mounting hole 121 and the first slots 1211, thereby further improving the reliability of the installation.

[0056] On two opposite side walls of the middle mounting hole 121, there are fourth slots 1212 which are correspondingly inserted and matched with two sides of the yoke 210. On the upper ends of two opposite side walls of the two fourth slots 1212, there are the first slots 1211 as described above. On each of the two sides of the yoke 210, there are correspondingly two support blocks 220. The first slot 1211 includes an insertion opening 1213 located at the upper end of the middle mounting hole 121, a first support wall 1214 located at the bottom, and guiding walls 1215 distributed on both sides of the first support wall 1214. On the guiding wall 1215, there is a first protrusion 1216 which is matched with the support block 220 for limiting or snap - positioning. The first protrusion 1216 is an arc - shaped protrusion, which helps to reduce resistance and facilitate the insertion of the support block 220. The rubber pad 222 is cylindrical. The first support wall 1214 includes an arc - shaped groove 1217, which can further improve the contact and matching effect between the support block 3 and the first support wall 1214, improve the installation stability, and make the connection part not easy to shake.

[0057] In this embodiment, the first protrusion 1216 mainly plays a role of cooperating with the rubber pad 222 of the support block 220 for limiting. When the support block 220 is inserted into the first slot 1211, by using the deformation characteristic of the rubber pad 222, it can cross over the first protrusion 1216. When it is inserted to the position where it is in contact and abuts against the first support wall 1214, the first protrusion 1216 can play a role of limiting the support block 220 to prevent it from coming out upwards. Of course, in other embodiments, the first protrusion 1216 can also squeeze and abut against the rubber pad 222, which can also achieve the same effect.

[0058] In this embodiment, the first connecting rod 221 is integrally formed on the yoke 210, which is convenient for integral processing and forming, and can also reduce the number of components. In other embodiments, the first connecting rod 221 can also be fixedly inserted through the yoke 210, for example, inserting the first connecting rod 221 through and fixing it in the hole of the yoke 210.

[0059] The first connecting rod 221 is cylindrical, and the rubber pad 222 is sleeved on the outer side of the first connecting rod 221. The cylindrical first connecting rod 221 is convenient for processing and forming, and in addition, it is also convenient for the quick socket installation of the rubber pad 222.

[0060] Such as Figures 14 - 16As shown, the control module includes a circuit board 300. On the inner walls on both sides of the first side mounting hole 122, second slots 1221 corresponding to the two side edges of the circuit board 300 are provided for mating insertion. On both sides of the circuit board 300, rubber connectors 310 are also provided. On the inner walls on both sides of the first side mounting hole 122, third slots 1222 for mating insertion with the rubber connectors 310 are provided. The insertion direction of the circuit board 300 and the first side mounting hole 122 is the same as that of the rubber connectors 310 and the third slots 1222.

[0061] The second slots 1221 are correspondingly connected to the lower ends of the third slots 1222. The upper ends of the third slots 1222 have insertion openings. The rubber connectors 310 are arranged on the upper parts of the two side edges of the circuit board 300. The second slots 1221 and the third slots 1222 are connected by a connecting groove 1223. The width of the connecting groove 1223 is gradually narrowed from top to bottom. The connecting groove 1223 can guide the two side edges of the circuit board 300 to be inserted into the second slots 1221, thus facilitating quick installation. The lower ends of the third slots 1222 have inclined limiting walls 1224. The lower ends of the second slots 1221 are provided with blocking walls 1225. On the one hand, the limiting walls 1224 can play a role in guiding the two sides of the circuit board 300 to be inserted into the connecting groove 1223, thus facilitating the insertion of the circuit board 300. On the other hand, the limiting walls 1224 have a limiting effect on the rubber connectors 310, which can prevent the rubber connectors 310 from being inserted into the connecting groove 1223. The blocking walls 1225 can be used to cooperate with the circuit board 300 for support, improving the reliability of its installation. Of course, they can also be used to limit the circuit board 300, facilitating its insertion into a specified position.

[0062] On the upper parts of the two side edges of the circuit board 300, second protrusions 320 are provided. The rubber connectors 310 include insertion holes for mating insertion and positioning with the second protrusions 320. The second protrusions 320 are horizontally inserted into the insertion holes of the rubber connectors 310. By adopting the horizontal insertion method, when the circuit board 300 is inserted downward into the first side mounting hole 122, the rubber connectors 310 are not easily detached from the second protrusions 320. On the upper parts of the two side edges of the circuit board 300, notches 330 are provided. The second protrusions 320 are formed between the tops of the two side edges of the circuit board 300 and the notches 320. The notches 330 are fitted with the rubber connectors 310. The second protrusions 320 are integrally formed on the circuit board 300, facilitating the integral processing of the second protrusions 320 and reducing the use of parts.

[0063] Connecting the second slot 1221 and the third slot 1222 together, and disposing the rubber connecting member 310 at the upper parts of the two side edges of the circuit board 300 can make the overall structure more compact, the force more evenly distributed, and reduce the occupation of the lateral space of the first side mounting hole 122.

[0064] In the above structure, inserting the circuit board 300 into the first side mounting hole 122 and making rational use of the internal space of the contactor helps to make the overall structure of the contactor product more compact; when the armature is attracted and generates vibration in the longitudinal direction, the circuit board 300 and the middle shell 120 mainly rely on the cooperation of the rubber connecting member 310 to support the force, and the characteristics of the material of the rubber connecting member 310 itself can play a role in buffering and shock absorption, which can improve the service life of the product. In addition, due to the error between the workpiece sizes, the rubber connecting member 310 can also play a function of over-travel self-adaptation when being inserted and fitted with the middle shell 120, improving the connection reliability and making the circuit board 300 not easy to shake.

[0065] When the upper cover is fixed to the upper end of the middle shell, it can close the insertion opening at the upper end of the third slot 1222, thereby avoiding the circuit board 300 from being disengaged upward from the first side mounting hole 122.

[0066] It should be noted that the width of the second slot 1221 is slightly smaller than the width of the rubber connecting member 310, which enables the two sides of the second slot 1221 to cooperate with the rubber connecting member 310 to clamp and thus achieve positioning.

[0067] The above takes the circuit board of the control module as an example, and the circuit board of the protection module can also adopt the same installation structure.

[0068] Such as Figures 3 - 5As shown, the arc ignition device includes a conductive sheet 410 and an arc ignition sheet 420 disposed between a base 110 and a middle shell 120. The conductive sheet 410 includes a first transverse section 411, a second transverse section 412, and a vertical section 413 that are arranged in parallel along the longitudinal direction. A bent structure is formed among the first transverse section 411, the second transverse section 412, and the vertical section 413. Based on the electromagnetic principle, a magnetic field can be formed when current passes through, and then a magnetic blowing effect is formed to improve the moving speed of the arc. The first transverse section 411 is located above the second transverse section 412. The first transverse section 411, the second transverse section 412, and the vertical section 413 of the conductive sheet 410 are integrally formed and can be formed by bending a strip-shaped workpiece. The other end of the second transverse section 412 is actually inserted outside the contactor housing and a terminal is formed. A receiving groove 414 is formed at an interval between one end of the first transverse section 411 and one end of the second transverse section 412. One end of the arc ignition sheet 420 includes a support portion 421 inserted into the receiving groove 414. The upper and lower ends of the support portion 421 are respectively in supporting cooperation with the first transverse section 411 and the second transverse section 412. The other end of the arc ignition sheet 420 includes an arc extinguishing sheet 422 extending longitudinally. The arc ignition sheet 420 and the arc extinguishing sheet 422 are integrally connected by an arc-shaped connecting section 423. The structure is simple and can be formed by bending a strip-shaped workpiece, which is convenient for production and processing. The arc extinguishing sheet 422 is actually inserted into the arc extinguishing chamber of the contactor and constitutes the arc extinguishing grid sheet in the contactor arc extinguishing system, which can introduce the arc into the arc extinguishing chamber for extinction, and can improve the arc ignition and arc extinguishing effects. A notch 424 for dividing the arc is provided at a position corresponding to the other end of the second transverse section 412 and the lower end of the second transverse section 412 at one end of the arc ignition sheet 420. The setting of the notch 424 can cut off the arc in advance before the arc enters the arc extinguishing chamber along the arc ignition sheet 420, dividing the large arc into small arcs, thereby further improving the arc extinguishing effect. At the same time, the setting of the notch 424 can also increase the contact surface of the arc ignition sheet 420 and improve the heat dissipation effect of the arc ignition sheet 420.

[0069] The notch 424 is a triangular structure. The large end of the notch 424 extends to one end of the second transverse section 412, and an opening 4241 is formed at one end of the second transverse section 412. The small end of the notch 424 extends towards the other end of the arc ignition sheet 420, so that the width of the notch 424 gradually narrows towards the other end of the arc ignition sheet 420, which helps to improve the arc cutting effect.

[0070] The provision of the support portion 421 can be used to support the second transverse section 412 when the contactor is engaged, preventing the deformation and damage of one end of the conductive sheet 410 caused by the impact and extrusion of the moving contact, thereby enhancing the structural strength of the conductive sheet 410 and extending the service life of the contactor product. Moreover, due to the above-mentioned connection structure between the conductive sheet 410 and the arcing sheet 420, the connection between the conductive sheet 410 and the arcing sheet 420 can be made more compact, preventing the arc from traveling through the gap between the conductive sheet 410 and the arcing sheet 420. In addition, the provision of the support portion 21 can also function as a magnetic conduction structure, further enhancing the magnetic blow effect of the conductive sheet 410.

[0071] The support portion 421 is located above one end of the arcing sheet 420, and the other end of the second transverse section 412 is inserted between the support portion 421 and one end of the arcing sheet 420 along the opening 4241. Such a structural design can further improve the reliability of the connection between the conductive sheet 410 and the arc extinguishing sheet 422, facilitating the cooperative installation among the conductive sheet 410, the arc extinguishing sheet 422, and the contactor housing.

[0072] A silver contact (not shown in the figure) is provided at the lower end of the second transverse section 412, which is correspondingly arranged in the notch 424. The silver contact on the second transverse section 412 is used to cooperate with the silver contact on the moving contact for conductive contact. By arranging it in the notch 424, it can be cut off in a timely manner when an arc is generated, which is beneficial to improving the overall arc extinguishing effect.

[0073] A stepped groove 415 for cooperating and aligning with the silver contact is provided at the lower end of the second transverse section 412. The stepped groove 415 has an arc-shaped side wall, which can be used for auxiliary positioning during the welding between the silver contact and the conductive sheet, thus facilitating production and processing.

[0074] A first convex block 4121 is provided at the lower end of the second transverse section 412, and a guide groove 4211 for cooperating and guiding the insertion of the first convex block 4121 is provided at the upper end of the support portion 421. Through the sliding cooperation between the first convex block 4121 and the guide groove 4211, the support portion 421 can be conveniently inserted into the accommodation groove 414 in a guiding and sliding manner, and it can also play a role in limiting, improving the reliability of the connection between the conductive sheet 410 and the arcing sheet 420.

[0075] The first protrusion 4121 of the second transverse section 412 is provided with a screw hole 4122, which is used to insert a screw, and the conductive sheet 410 and the contactor housing can be fixed by the screw, which has a simple structure and is easy to install. The support portion 421 is provided with a second protrusion 4212, and the second protrusion 4212 is provided with a screw hole, and the first transverse section 411 is correspondingly provided with a through hole 4111. By passing one end of the screw through the through hole 4111 and connecting it with the screw hole of the second protrusion 4212, the conductive sheet 410 and the arc-starting sheet 420 can be reliably connected and fixed together.

[0076] The advantages of the above structure are: through the arc blowing and arc striking integrated conductive sheet 410 and the cooperation with the arc striking sheet 420, the arc blowing of the conductive sheet 410 itself and the overall arc striking effect can be strengthened, and the arc root is accelerated to transfer to the arc extinguishing chamber for cooling until it is extinguished. The conductive material of the moving contact bridge is preferably mainly copper material, and the parallel use of steel material increases the bending strength of the conductive sheet 410 and further increases the arc blowing magnetic force. The conductive sheet 410 connected to the arc striking sheet 420 can increase the arc voltage and increase the arc voltage, and can also well reduce the wear of the moving contact material.

[0077] like Figures 6 - 10 As shown, the wiring device includes a wiring slot 510 arranged on the side of the shell, a wiring terminal 520 arranged in the wiring slot 510, the wiring terminal 520 is arranged at the other end of the second transverse section 412, and a wiring hole 521 is arranged on the wiring terminal 520. A wiring block 530 is also arranged in the wiring slot 510, and the wiring block 530 is correspondingly arranged at the upper or lower position of the wiring terminal 520, and a screw hole is arranged on the wiring block 530. The wiring slot 510 has a notch 511 of the wiring slot on the side of the shell 1, and the wiring slot 510 has two oppositely arranged side walls 512. The two sides of the wiring block 530 and the two side walls 512 of the wiring slot 510 form a guiding active fit, so that the connection The wiring block 530 can slide in the lateral direction and in the vertical direction. There is a limit structure between the two oppositely arranged side walls of the wiring block 530 and the wiring slot 510. The limit structure is used to limit the wiring block 530 to move up and down only in the direction of approaching or moving away from the wiring terminal 520 within a limited distance, and can also limit the wiring block 530 to move in the direction of approaching or moving away from the notch 511 of the wiring slot 510 within a limited distance. That is, the limit structure can limit the lateral movement distance and the vertical movement distance of the wiring block 530 to avoid the wiring block 530 from moving too far, and can also prevent the wiring block 530 from slipping out along the notch 511 of the wiring slot, and prevent the wiring block 530 from being lost. When the wiring is tightened, the two side walls 512 of the wiring slot 510 also have the function of limiting the rotation of the wiring block 530, so that when tightening the screws, there is no need to use a wrench to fix the wiring block 530, and the wiring operation is more convenient.

[0078] The limiting structure includes a limiting portion 541 arranged on at least one side wall of the wiring slot 510. The limiting portion 541 is located on the side of the wiring block 530 that is away from the wiring terminal 520. The limiting portion 541 can be a convex rib arranged on the side wall 512 of the wiring slot 510, or it can be a stepped portion arranged on the side wall 512 of the wiring slot 510.

[0079] The limiting structure also includes a guide groove 542 arranged in the wiring groove 510, and movable blocks 531 that are movably connected to the guide groove 542 are arranged on both sides of the wiring block 530. The movable block 531 can move along the up and down directions of the guide groove 542 and in the direction approaching or moving away from the notch 511 of the wiring groove 510. One end of the guide groove 542 corresponding to the notch 511 of the wiring groove 510 cooperates with the movable block 531 for limiting, so as to prevent the movable block 531 from escaping out of the notch 511 of the wiring groove.

[0080] In this embodiment, the guide groove 542 and the side wall of the wiring groove 510 have the same width, a wedge-shaped groove 513 is provided between the side wall of the guide groove 542 and the side wall 512 of the wiring groove 510, and the two ends of the wedge-shaped groove 513 along the length direction thereof are extended in the up-down direction, and the two movable blocks 531 of the wiring block 530 are connected to the main body of the wiring block 530 by an elastic connecting portion 532, and the movable block 531 is wedge-shaped, and the movable block 531 cooperates with the wedge-shaped groove 513 to limit the position. When the wedge-shaped movable block 531 is inserted along the notch 511 of the wiring groove under the action of the elastic connecting portion 532, it can be inserted into the wedge-shaped groove 513 by itself, and it can form a sliding fit with the wedge-shaped groove 513 in the up-down direction, and it can also play a role in preventing the movable block 531 from coming out along the notch 511 of the wiring groove. In addition, by driving the movable block 531 to continue to move inward, the movable block 531 can be guided to be inserted into the guide groove 542 , so that the movable block 531 can move in a direction away from the notch of the wiring groove 510 .

[0081] The terminal block 530 includes a through hole 533 which is arranged throughout. A hexagonal hole 534 which is connected to the through hole 533 is arranged on the side of the terminal block 530 which is away from the terminal 520. A hexagonal nut is embedded and positioned in the hexagonal hole 534. The screw hole is arranged on the hexagonal nut. The screw hole provided by the hexagonal nut can improve the screw connection effect with the screw. The rest of the terminal block 530 except the hexagonal nut can be made of plastic material, which helps to reduce the cost and weight of the product. The hexagonal hole 534 is provided with a convex rib, which can improve the embedding and positioning effect with the hexagonal nut.

[0082] During the wiring operation, insert the copper ring at the end of the wire into the wiring slot 510 and simultaneously between the wiring terminal 520 and the wiring block 530. By adjusting the position of the wiring block 530, align the wiring hole 521 of the wiring terminal 520, the screw hole of the wiring block 530, and the hole of the copper ring. Pass a screw through these holes to lock and fix the wiring terminal 520, the wiring block 530, and the copper ring together, realizing the electrical connection between the wire and the contactor. During the wiring process, due to machining precision errors, such as different thicknesses, hole positions, and sizes of the copper rings, adjusting the position of the wiring block 530 can compensate for the precision errors and improve the adaptability of the contactor product during wiring.

[0083] As Figures 17 - 18 shown, the contact device includes a contact support 610 movably arranged in the middle mounting hole 121. The electromagnetic drive device includes an iron core 620. The iron core 620 is arranged at the upper end of the contact support 610. The iron core 620 includes a connection hole 621 penetrating through both sides thereof, and a second connecting rod 622 is inserted through the connection hole 621. A connection member 630 is arranged on each side of the contact support 610. The connection member 630 forms a transverse plug-in positioning fit with both sides of the contact support 610 and both ends of the second connecting rod 622. A connection fit is established between the contact support 610 and the iron core 620 through the connection member 630. The arrangement of the connection member 630 can particularly form a limit fit between the contact support 610 and the iron core 620 in the suction and movement direction, keeping a reliable connection between the contact support 610 and the iron core 620. The outer side of the connection member 630 has a sliding connection portion 631, and a sliding groove 1218 for sliding connection with the sliding connection portion 631 is provided on the side wall of the middle mounting hole 121. The outer side of the connection member 630 refers to the side of the connection member 630 facing the direction opposite to the contact support 610. The sliding connection portion 631 is used to form a guiding sliding fit with the sliding groove 1218 to improve the stability of the up and down sliding of the contact support 610. A state indicating portion 632 is arranged at the upper end of the connection member 630. By cooperating with the state indicating hole 1312 of the upper cover 131, the working state of the contactor can be visually checked from the outside. The principle is that the connection member 630 will move up and down synchronously with the contact support 610. By observing whether the state indicating portion 1312 is completely inserted into the state indicating hole 1312, the suction state of the contactor armature can be judged.

[0084] A notch 611 is provided at the upper end of the contact support 610, and the lower end of the iron core 620 is inserted into the notch 611, which can further improve the connection and cooperation effect between the contact support 610 and the iron core 620. An interlock hole 634 is provided on the side of the connection member 630, and the interlock hole 634 is used to cooperate with other devices to achieve mechanical interlock. An auxiliary contact interface 633 is also provided on the side of the connection member 630, and the auxiliary contact interface 633 is used to cooperate with the auxiliary contact to achieve connection and linkage. With this connection structure, the overall contact device not only has many functional derivative interfaces, is structurally compact, and is convenient for assembly, but also has good connection reliability between the contact support 610 and the iron core 620 of the contact device.

[0085] It should be noted that the structural features and functions such as the above-mentioned interlock hole 634, auxiliary contact interface 633, and status indication part 1312 exist in conventional contactor products. However, they are usually directly configured on the contact support 610, which has certain requirements for the structure of the contact support 610, increasing the difficulty of the production process, or are realized through the linkage of other components cooperating with the contact support 610, which leads to an increase in the number of components and the complexity of the overall structure of the contactor, and also increases the assembly difficulty. In the present invention, these structural features are combined into the connection member for connecting between the contact support 610 and the iron core 620, with a simple structure, fewer components, and convenient production and processing.

[0086] T-shaped slots 612 are provided on both sides of the contact support 610. The connection member 630 includes a plug-in part 635 that is horizontally plugged in cooperation with the T-shaped slots 612. A positioning hole for plug-in and positioning in cooperation with the end of the second connecting rod 622 is provided at the front end of the plug-in part 635. Third protrusions 613 are provided on both sides of the contact support 610 at positions corresponding to the lower sides of the T-shaped slots 612. A plug-in hole 636 for horizontal plug-in and positioning cooperation with the third protrusions 613 is provided at the lower end of the connection member 630.

[0087] The design of the above-mentioned horizontal plug-in and positioning structure enables the second connecting rod 622 on the contact support 610 and the iron core 620 to be restricted from moving away from each other when horizontally plugged in cooperation with the connection member 630, improving the connection reliability.

[0088] Such as Figures 19 - 20As shown, the contact device includes a spring 7. The contact support 610 includes a support platform 614. A plurality of first insertion and positioning portions 6141 for mating and inserting and positioning with one end of the spring 7 are distributed on the support platform 614. A plurality of spring grooves 124 for mating and inserting and positioning with the other end of the spring 7 are provided around the central mounting hole 121. One end of the spring groove 124 corresponding to the support platform 614 has an insertion opening 1241. An installation opening 1242 communicating with the outside of the spring groove 124 is provided on the side of the other end of the spring groove 124. The installation opening 1242 communicates with the first side mounting hole 122 or the second side mounting hole 123. A second support wall 1243 for supporting the other end of the spring 7 is provided at the other end of the spring groove 124. The spring 7 can be inserted into the spring groove 124 from the first side mounting hole 122 or the second side mounting hole 123 along the installation opening 1242 for installation.

[0089] A second insertion and positioning portion 1244 is provided on the second support wall 1243. The setting of the second insertion and positioning portion 1244 can cooperate with the other end of the spring 7 for insertion and positioning, which can further improve the insertion and positioning effect between the spring 7 and the spring groove 124 and improve the reliability of spring installation.

[0090] In this embodiment, both the first insertion and positioning portion 6141 and the second insertion and positioning portion 1244 are protrusions, which are inserted and positioned in the inner hole of the spring 7. In other embodiments, the first insertion and positioning portion 6141 and the second insertion and positioning portion 1244 can also be insertion holes sleeved on the outside of the end of the spring 7, which can also achieve the same effect.

[0091] In this embodiment, the second insertion and positioning portion 6141 further includes an inclined end face arranged in the direction of the installation opening 1242. The inclined end face can promote the compression of the spring 7 when the spring 7 is inserted laterally, so as to further facilitate the installation of the spring 7.

[0092] The length of the spring 7 in the unpressurized state is greater than the distance between the support portion 11 and the second support wall 1243, which enables the spring 7 to have a certain pre-tightening force after being installed, helping to improve the effect of driving the contact support to reset.

[0093] During installation, first insert the contact support 610 and the middle shell 120 together. Insert one end of the spring 7 into the spring groove 124 along the installation port 1242. Under the guiding action of the spring groove 124, one end of the spring 7 passes through the socket 1241 and is inserted and positioned in cooperation with the first insertion positioning portion 6141. Then, compress the other end of the spring 7 appropriately and horizontally place it into the spring groove 124, so that the other end of the spring 7 is inserted and positioned in cooperation with the second insertion positioning portion 1244 of the spring groove 124, thereby enabling the quick installation of the spring 7. Especially when the number of springs 7 is large, it is not easy to be interfered by the elastic force of other springs 7 during the installation of the spring 7, and the operation is relatively convenient.

[0094] Advantages of the attraction and repulsion force structure composed of the electromagnetic drive device and the contact: The moving and static iron core structures of the electromagnetic drive device can not only ensure sufficient solenoid force, but also have a large-area pole shoe to enhance the initial attraction force, an appropriate residual magnetic gap, and the reverse force of the electronic control circuit. Even without adding a damping ring part, the moving contact can also be opened equally quickly after the coil is powered off.

[0095] As Figure 2 shown, the protection module includes a secondary current monitoring element installed in the second side installation hole 123. There is a horizontally arranged partition wall 112 between the middle shell 120 and the base 110. The partition wall 112 is integrally formed on the base 110. The conductive sheet 410 is fixedly installed at the lower part of the partition wall 112. An embedding port 1121 is provided through the upper part of the partition wall 112 at the position corresponding to the conductive sheet 410. The secondary current monitoring element 8 is arranged in the second side installation hole 123, and is simultaneously embedded and fixed in the embedding port 1121 and cooperates with the conductive sheet 410 for monitoring. The secondary current monitoring element 8 is a patch-type Hall current transformer. Connection holes are correspondingly provided on the secondary current monitoring element 8, the partition wall 112, and the conductive sheet 410. A lug 81 is provided on the side of the secondary current monitoring element 8, and the connection hole is provided on the lug 81. The lug 81, the partition wall 112, and the conductive sheet 410 are fixed together by a connecting piece passing through the connection hole, which can simplify the structure, facilitate installation, and improve the fixed installation effect of the Hall current transformer.

[0096] The secondary current monitoring element 8 adopts the above installation structure, which is simple and compact, can reduce the circuit layout, and is convenient for installation.

[0097] The above embodiments are only one of the preferred specific embodiments of the present invention. The common changes and substitutions made by those skilled in the art within the scope of the technical solution of the present invention are included in the protection scope of the present invention.

Claims

1. A contactor, comprising a housing, an arc - starting device, a wiring device, an electromagnetic driving device, a contact device, a control module, and a protection module provided on the housing, Characterized in that: The housing includes a base, a middle shell, and an upper cover. There is a middle mounting hole and two side mounting holes provided at the upper end of the middle shell. The middle mounting hole is located in the middle of the middle shell and is used to accommodate and install the electromagnetic driving device. The two side mounting holes are respectively located on both sides of the middle mounting hole and are respectively used to accommodate and install the control module and the protection module. The upper cover is used to cooperate and seal with the upper ends of the middle mounting hole and the side mounting holes. The electromagnetic driving device includes a yoke provided in the middle mounting hole. A plurality of support blocks are provided on the upper side of the yoke. The support block includes a first connecting rod fixedly connected and matched with the yoke, and a rubber pad provided on the outside of the first connecting rod. A plurality of first slots for fitting and positioning with the support blocks are provided at the upper side of the side of the middle mounting hole. The insertion direction of the support block relative to the first slot is the same as the insertion direction of the yoke relative to the middle mounting hole. The control module or the protection module includes a circuit board. Second slots for fitting and connecting with the two side edges of the circuit board are correspondingly provided on the inner walls of both sides of the side mounting hole. Rubber connectors are also provided on both sides of the circuit board. Third slots for fitting and inserting with the rubber connectors are provided on the inner walls of both sides of the side mounting hole. The insertion direction of the circuit board and the side mounting hole and the insertion direction of the rubber connector and the third slot are the same; On the two opposite side walls of the middle mounting hole, fourth slots for corresponding plug - in cooperation with both sides of the yoke are provided. The first slots are provided at the upper ends of the two opposite side walls of the two fourth slots. Two support blocks are correspondingly provided on each side of the yoke. The first slot includes an insertion port at the upper end of the middle mounting hole, a first support wall at the bottom, and guiding walls distributed on both sides of the first support wall. First protrusions for limiting or clamping and positioning with the support block are provided on the guiding walls. The rubber pad is cylindrical. The first support wall includes an arc - shaped groove.

2. The contactor according to claim 1, Characterized in that: The second slot is correspondingly connected to the lower end of the third slot. The upper end of the third slot has an insertion port. The rubber connectors are provided on the upper parts of the two side edges of the circuit board. The second slot and the third slot are connected by a connecting groove. The width of the connecting groove is gradually narrowed from top to bottom. The lower end of the third slot has an inclined limiting wall. A stop wall is provided at the lower end of the second slot.

3. The contactor according to claim 1, Characterized in that: Second protrusions are provided on the upper parts of the two side edges of the circuit board. The rubber connector includes a jack for fitting and positioning with the second protrusion. The second protrusion is horizontally inserted into the jack of the rubber connector. Notches are provided on the upper parts of the two side edges of the circuit board. The second protrusion is formed between the top of the two side edges of the circuit board and the notch. The notch is fitted and installed with the rubber connector.

4. The contactor according to claim 1, Characterized in that: The arc-striking device includes a conductive sheet and an arc-striking sheet arranged between the base and the middle shell, the conductive sheet includes a first transverse section, a second transverse section, and a vertical section connected between one end of the first transverse section and one end of the second transverse section, the first transverse section is located above the second transverse section, and a receiving groove is formed between one end of the first transverse section and one end of the second transverse section, one end of the arc-striking sheet includes a supporting portion inserted in the receiving groove, and the upper and lower ends of the supporting portion respectively form a supporting cooperation with the first transverse section and the second transverse section, the other end of the arc-striking sheet includes an arc-extinguishing sheet extending longitudinally, the arc-striking sheet and the arc-extinguishing sheet are integrally connected by an arc-shaped connecting section, and one end of the arc-striking sheet is provided with a notch for dividing the arc at a position corresponding to one end of the second transverse section and the lower end of the second transverse section.

5. The contactor according to claim 1, Features: The wiring device includes a wiring slot arranged on the side of the shell, a wiring terminal arranged in the wiring slot, a wiring hole is arranged on the wiring terminal, and a wiring block is also arranged in the wiring slot. The wiring block is correspondingly arranged above or below the wiring terminal, and a screw hole is arranged on the wiring block. The two sides of the wiring block and the two side walls of the wiring slot form a guiding movable fit. There is a limiting structure between the wiring block and the two oppositely arranged side walls of the wiring slot. The limiting structure is used to limit the wiring block to only move up and down in a direction close to or away from the wiring terminal within a limited distance, and can also limit the wiring block to move in a direction close to or away from the notch of the wiring slot within a limited distance.

6. The contactor according to claim 5, Features: The limiting structure includes a limiting portion arranged on at least one side wall of the wiring slot, which is located on a side of the wiring block opposite to the wiring terminal. The limiting structure also includes a guide slot arranged in the wiring slot, and movable blocks movably connected with the guide slot are arranged on both sides of the wiring block. The movable block can move along the up and down directions of the guide slot and in a direction approaching or moving away from the notch of the wiring slot. One end of the guide slot corresponding to the notch direction of the wiring slot cooperates with the movable block for limiting. The two movable blocks of the wiring block are connected to the main body of the wiring block by an elastic connecting portion. One end of the guide slot corresponding to the notch direction of the wiring slot is provided with a wedge-shaped slot. The movable block is wedge-shaped, and the movable block cooperates with the wedge-shaped slot for limiting.

7. The contactor according to claim 1, Features: The contact device includes a contact support movably arranged in the central mounting hole. The electromagnetic drive device includes an iron core, which is arranged at the upper end of the contact support. The iron core includes a connection hole penetrating through its two sides, and a second connecting rod is inserted through the connection hole. One connection member is arranged on each side of the contact support. The connection member, the two sides of the contact support and the two ends of the second connecting rod form a transverse plug-in positioning fit. The outer side of the connection member has a sliding connection part, and a sliding groove for cooperating with the sliding connection part is arranged on the side wall of the central mounting hole. A state indicating part is arranged at the upper end of the connection member. A notch is arranged at the upper end of the contact support, and the lower end of the iron core is inserted into the notch. An interlock hole is arranged on the side part of the connection member, and an auxiliary contact interface is arranged on the side part of the connection member.

8. The contactor according to claim 1, characterized in that: the contact device includes a contact support movably arranged in the central mounting hole and a spring arranged between the contact support and the middle shell. The contact support includes a support platform, and a plurality of first plug-in positioning parts for cooperating with one end of the spring for plug-in positioning are distributed on the support platform. A plurality of spring grooves for cooperating with the other end of the spring for plug-in positioning are arranged around the central mounting hole. One end of the spring groove corresponding to the support platform has a socket, and an installation port communicating with the outside of the spring groove is arranged on the side part of the other end of the spring groove. A second support wall for cooperating with and supporting the other end of the spring is arranged at the other end of the spring groove.

9. The contactor according to claim 1, characterized in that: the protection module includes a secondary current monitoring element installed in the side mounting hole. A horizontal partition wall is included between the middle shell and the base. A conductive sheet is arranged at the lower part of the partition wall. A fitting port is penetrated through the upper part of the partition wall at a position corresponding to the conductive sheet. The secondary current monitoring element is embedded and fixed in the fitting port and cooperates with the conductive sheet for monitoring.

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