Multifunctional contactor

Abstract

The invention relates to the technical field of contactors, and discloses a multifunctional contactor which comprises an upper shell and a base connected with the upper shell in a clamped mode, a movable support, a movable iron core, a coil support, a coil winding and a static iron core are arranged in the upper shell and the base from top to bottom, and the coil support, the coil winding and the static iron core are fixed in the base. The coil support is arranged on the static iron core in a sleeved mode, a return spring is arranged between the coil support and the movable iron core, the movable support is connected with the movable iron core and slides in the upper shell, a plurality of movable contact sets are arranged on the movable support in parallel, and fixed contact sets are arranged on the two sides of each movable contact set. According to the multifunctional contactor, through the cooperation design of the contact roller and the semi-arc groove, line contact is converted into surface contact, the contact area is increased, the connection resistance is reduced, and the current loss is reduced; the combination of the friction strip and the inclined groove surface enables the contact roller to generate tiny rotation during each contact, so that local excessive wear is avoided, and the service life of the contact is prolonged.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of contactors, in particular to a multifunctional contactor. BACKGROUND

[0002] A contactor is an electrical component that controls the on-off of a circuit using electromagnetic principles. It is composed of an electromagnetic system (coil, core) and a contact system. Through a small current control signal, the electromagnetic system is driven to act, driving the contacts to close or open, thereby indirectly controlling the main circuit of large current. It is widely used in the fields of electric power and industrial automation, and can frequently operate the circuit, with the functions of control and protection.

[0003] In the patent with the patent number CN118571709A, a contactor is disclosed, which includes a shell, a contact structure including a contact assembly, a first electromagnetic assembly, and a drive shaft extending in a first direction. The contact assembly includes a static contact assembly and a moving contact arranged in sequence along the first direction. The static contact assembly is spaced apart from the drive shaft and includes first and second static contacts arranged in a circumferential direction of the drive shaft. The moving contact and the first electromagnetic assembly are connected to the drive shaft in sequence, and the first electromagnetic assembly can drive the drive shaft to move in the first direction. A rotating structure is provided in the shell and is spaced apart from the contact structure, and includes a second electromagnetic assembly connected to the drive shaft. The second electromagnetic assembly can drive the drive shaft to rotate.

[0004] The existing technology has the following defects: In the prior art, the contact structure of the contactor is mostly in the form of simple linear contact or point contact, and the contact area is limited, resulting in a large contact resistance. When the current passes through, a large amount of heat is generated, which not only increases the energy consumption, but also accelerates the wear of the contact points. At the same time, the contact part of the contact point is fixed, and after long-term use, it is easy to appear indentation or deformation due to local excessive friction, which seriously affects the conductivity and service life.

[0005] In terms of attraction and retention, the traditional contactor relies on the continuous energization of the coil to generate electromagnetic force to maintain the attraction state. Not only is the power consumption high, but the long-term heating of the coil also accelerates the aging and shortens the overall life. Moreover, the alternating current contactor produces a continuous "hum" noise due to the pulsation of electromagnetic force, and the stability of the attraction state is poor in a vibrating environment. It is easy to be disturbed to cause the contact point to loosen, affecting the reliability of the circuit control. SUMMARY

[0006] In view of the above problems existing in the prior art, a multifunctional contactor is proposed.

[0007] In one aspect of the present application, a multifunctional contactor is provided, which aims to prolong the service life of the coil, eliminate the continuous action of the electromagnetic force, reduce the current loss, and prolong the service life of the contact point.

[0008] The technical scheme of the present application is as follows: a multifunctional contactor comprises an upper shell and a base connected with the upper shell, and movable supports, a moving iron core, a coil support, a coil winding and a static iron core are arranged in the upper shell and the base from top to bottom, wherein the coil support, the coil winding and the static iron core are fixed in the base, the coil support is sleeved on the static iron core, a return spring is arranged between the coil support and the moving iron core, the movable supports are connected with the moving iron core and slide in the upper shell, and a plurality of movable contact point groups are arranged in parallel on the movable supports, and fixed contact point groups are arranged on both sides of each movable contact point group. The end sides of the movable contact point groups are provided with symmetrical shaft supports, a support shaft is connected between the shaft supports, a contact roller is rotatably arranged on the support shaft, the end of the fixed contact point group corresponding to the movable contact point group is provided with a contact pad, a semicircular arc groove is formed in the contact pad, and the semicircular arc groove is matched with the contact roller.

[0009] Further, an installation groove is arranged on the movable support, and a movable contact point spring is arranged in the installation groove, and the movable contact point spring presses the movable contact point group against the bottom of the installation groove.

[0010] Further, an arc chute is arranged at the end of each movable contact point group, and the cross section of the arc chute is in the shape of a Chinese character.

[0011] Further, a folding air bag is arranged in the arc chute, an installation wall is arranged at the lower end surface of the folding air bag, the installation wall is connected with the movable contact point group, a hanging ear is arranged at the upper end surface of the folding air bag, a support piece is arranged on the inner wall of the arc chute, the hanging ear is arranged on the support piece, an air outlet pipe is connected with the upper end surface of the folding air bag, and the other end of the air outlet pipe extends to the fixed contact point group.

[0012] Further, the semicircular arc groove is arranged obliquely, and a friction strip is arranged at the highest point of the semicircular arc groove.

[0013] Further, an arc-shaped groove is arranged on the movable contact point group, and the arc-shaped groove is attached to the outer wall of the contact roller.

[0014] Further, a pin rod is arranged on the moving iron core, a hook rod is arranged on the pin rod, the hook rod is elastic, a locking plate is arranged on the inner wall of the coil support, a right-angled triangular groove is arranged on the locking plate, an obtuse-angled triangular convex island is arranged in the right-angled triangular groove, a clamping groove is arranged at the lowermost side of the obtuse-angled triangular convex island, and a clamping rod is arranged at the corresponding position of the edge of the right-angled triangular groove and the clamping groove; when the coil winding is disconnected, the lower end of the hook rod is attached to the longest side of the obtuse-angled triangular convex island; when the coil winding is connected, the lower end of the hook rod slides along the longest side of the obtuse-angled triangular convex island to the clamping groove.

[0015] Further, a support plate is arranged in the static iron core, and the support plate is clamped on the base.

[0016] Further, an elastic sheet is arranged in the moving iron core, and the elastic sheet is connected with the movable support.

[0017] Beneficial effects of the present invention: 1. Based on the principle of electromagnet, a small current control signal is used to indirectly control the large current main circuit. The precise connection between the movable contact group and the fixed contact group ensures that the main circuit's on-off response is rapid and the basic control logic is stable and reliable.

[0018] 2. The coordinated design of the contact roller and the semicircular arc groove converts line contact into surface contact, thereby increasing the contact area, reducing the on-resistance, and reducing current loss. The combination of the friction strip and the inclined groove surface causes the contact roller to rotate slightly each time it contacts, thus avoiding local excessive wear and extending the service life of the contact.

[0019] 3. The mechanical locking structure of the hook rod and the locking plate does not require the coil to be continuously energized after attraction, significantly reducing maintenance power consumption and heat generation, and extending the life of the coil; it gets rid of the continuous action of electromagnetic force and eliminates the AC "buzzing" noise of traditional contactors. At the same time, the rigid connection of the mechanical lock improves vibration resistance and ensures a stable attraction state. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a three-dimensional diagram of the multifunctional contactor of the present invention; Figure 2 It is a front view of the multifunctional contactor of the present invention; Figure 3 For the present invention Figure 2 Cross-sectional view at AA in the middle; Figure 4 An exploded view of the multifunctional contactor of the present invention; Figure 5 For the present invention Figure 4 Another perspective of Figure 6 This is a cross-sectional view of the folded airbag in the multifunctional contactor of the present invention; Figure 7 A three-dimensional diagram of the foldable airbag in the multifunctional contactor of the present invention; Figure 8 A three-dimensional diagram of a movable contact group in a multifunctional contactor of the present invention; Figure 9 It is a three-dimensional diagram of the moving iron core, coil support, coil winding, and static iron core in the multifunctional contactor of the present invention; Figure 10 It is a top view of the moving iron core, coil support, coil winding, and static iron core in the multifunctional contactor of the present invention; Figure 11 For the present invention Figure 10 Cross-sectional view at the middle BB; Figure 12 For the present invention Figure 11 Enlarged view of the structure at point C in the middle.

[0021] Fig.: 1, the upper shell; 2, the base; 3, the movable support; 4, the moving iron core; 5, the coil support; 6, the coil winding; 7, the static iron core; 8, the return spring; 9, the movable contact group; 10, the fixed contact group; 11, the installation slot; 12, the movable contact spring; 13, the arc extinguishing cover; 14, the folding air bag; 15, the installation wall; 16, the hanging ear; 17, the support piece; 18, the air outlet pipe; 19, the shaft support; 20, the support shaft; 21, the contact roller; 22, the contact pad; 23, the semicircular arc slot; 24, the friction strip; 25, the arc-shaped slot; 26, the pin rod; 27, the hook rod; 28, the locking plate; 29, the right-angled triangular recess; 30, the obtuse-angled triangular convex island; 31, the clamping slot; 32, the clamping rod; 33, the support plate; 34, the elastic sheet. DETAILED DESCRIPTION

[0022] In order to make the above-mentioned objectives, features and advantages of the present application more apparent and easy to understand, the specific embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0023] Embodiment 1, refer to Figures 1-5 For the first embodiment of the present application, it comprises an upper shell 1 and a base 2 clamped with the upper shell 1, the upper shell 1 and the base 2 jointly form a closed installation space, and inside the installation space, from top to bottom, are sequentially arranged a movable support 3, a moving iron core 4, a coil support 5, a coil winding 6 and a static iron core 7. Among them, the coil support 5, the coil winding 6 and the static iron core 7 are fixed in the base 2 by clamping or tight fitting, the coil support 5 is in a cylindrical shape and is sleeved outside the static iron core 7, and between the coil support 5 and the moving iron core 4 is arranged a return spring 8, one end of the spring is abutted against the top of the coil support 5, and the other end is abutted against the moving iron core 4, thereby providing the moving iron core 4 with a reset elastic force. The movable support 3 is fixedly connected with the moving iron core 4 through a connecting piece, and can slide up and down along the guide structure inside the upper shell 1, and on the movable support 3 are arranged in parallel a plurality of movable contact groups 9, each movable contact group 9 is composed of movable contact pieces connected with each other, and on both sides of each movable contact group 9 are correspondingly arranged fixed contact groups 10, and the fixed contact groups 10 are fixed on the inner wall of the upper shell 1 through an insulating support, thereby forming a stable connection with the external circuit.

[0024] Refer to Figures 3-4 On the movable support 3 is arranged an installation slot 11, and in the installation slot 11 is arranged a movable contact spring 12, the movable contact spring 12 presses the movable contact group 9 against the bottom of the installation slot 11, and the movable contact spring 12 provides the movable contact group 9 with a continuous downward pressure, thereby ensuring that the contacts between the movable contact group 9 and the fixed contact group 10 are in close contact after the movable contact group 9 and the fixed contact group 10 are closed, and avoiding the generation of electric sparks.

[0025] Refer to Figures 3-4The end of each movable contact group 9 is provided with an arc extinguishing cover 13, which is shaped like a Chinese character "fang" in cross section. The end of the movable contact group 9 extends into the arc extinguishing cover 13 from the open side of the arc extinguishing cover 13, and the other side of the arc extinguishing cover 13 is provided with a hole through which the fixed contact group 10 extends into the arc extinguishing cover 13.

[0026] With reference to Figure 3 A supporting plate 33 is arranged in the static iron core 7, and the supporting plate 33 is clamped on the base 2 to fix the static iron core 7.

[0027] With reference to Figure 3 A spring 34 is arranged in the moving iron core 4, and the spring 34 is connected with the movable support 3 to connect the moving iron core 4 with the movable support 3.

[0028] The working principle of the embodiment is as follows: when a small current control signal is input into the coil winding 6, the coil winding 6 and the static iron core 7 together form an electromagnet, and the magnetic force generated by the static iron core 7 overcomes the elastic force of the return spring 8 to attract the moving iron core 4 to move downward, the moving iron core 4 drives the movable support 3 and the movable contact group 9 thereon to move downward synchronously, so that the movable contact group 9 is in precise contact with the fixed contact groups 10 on both sides, thereby realizing the corresponding connection of the originally disconnected fixed contact groups 10, and indirectly controlling the on-off of the large current main circuit by using the small current control signal. When the coil winding 6 is powered off, the magnetic force of the electromagnet disappears, and the elastic force of the return spring 8 pushes the moving iron core 4 to move upward, the movable support 3 is reset with the moving iron core 4, the movable contact group 9 is separated from the fixed contact group 10, and the main circuit is disconnected. The whole process is fast in response and reliable in control.

[0029] Embodiment 2, with reference to Figures 6-9 The second embodiment of the present application is different from the first embodiment in that a folding air bag 14 is arranged in the arc extinguishing cover 13. The folding air bag 14 is made of temperature-resistant elastic material, and has an organ-like wrinkle structure in cross section, which has good stretching performance and can greatly reduce the longitudinal height when being pressed, and can naturally stretch back to the original position when being released. An open ring-shaped mounting wall 15 is integrally formed on the lower end surface of the folding air bag 14, and the mounting wall 15 is fixedly connected with the top of the movable contact group 9 through buckling or bolts, and moves synchronously with the vertical movement of the movable contact group 9, thereby controlling the unfolding and folding of the folding air bag 14. A hanging ear 16 is arranged on the edge of the upper end surface of the folding air bag 14; correspondingly, a support piece 17 adapted to the hanging ear 16 is horizontally arranged on the inner wall of the arc extinguishing cover 13 at a corresponding height, and the support piece 17 is provided with a limiting groove matched with the hanging ear 16, the hanging ear 16 is arranged in the limiting groove and is limited, so that the upper end of the folding air bag 14 is always fixed. A gas outlet pipe 18 is connected to the center of the upper end surface of the folding air bag 14, and the gas outlet pipe 18 is made of hard temperature-resistant pipe material, one end of which is communicated with the inside of the folding air bag 14, and the other end is bifurcated and extends to the vicinity of the contact position of each fixed contact group 10, and forms a flat gas outlet at the pipe opening.

[0030] Referring to Figure 8 The end sides of the movable contact group 9 are integrally formed with symmetrical shaft supports 19, the shaft supports 19 are opposite to each other, corresponding positions of the pair of shaft supports 19 are provided with shaft holes, a support shaft 20 is arranged in the holes, the support shaft 20 is in clearance fit with the shaft holes, so that the support shaft 20 can rotate flexibly. The middle part of the support shaft 20 is sleeved with a contact roller 21, the inner wall of the contact roller 21 is tightly combined with the support shaft 20, and can rotate synchronously with the support shaft 20, and the outer wall of the contact roller 21 is made of a material with excellent electrical conductivity and is subjected to smooth treatment. The movable contact group 9 is provided with an arc-shaped groove 25 on the side close to the contact roller 21, the curvature of the arc-shaped groove 25 is matched with the curvature of the outer wall of the contact roller 21, the groove surface is tightly combined with the outer wall of the contact roller 21, which not only plays an auxiliary supporting role on the contact roller 21, but also can ensure that the current is stably conducted through the arc-shaped groove 25 and the contact roller 21.

[0031] The end part of the fixed contact group 10 corresponding to the movable contact group 9 is fixed with a contact pad 22 by riveting or welding, the contact pad 22 is made of an alloy material with high temperature resistance and good electrical conductivity. The side of the contact pad 22 facing the contact roller 21 is provided with a semicircular arc groove 23, the curvature of the semicircular arc groove 23 is completely matched with the outer wall of the contact roller 21, when the movable contact group 9 contacts with the fixed contact group 10, the contact roller 21 can be precisely embedded in the semicircular arc groove 23, so that the contact surfaces of the two are changed from linear contact to surface contact, thereby significantly increasing the contact area, effectively reducing the resistance when being turned on, and reducing the heat loss when the current passes through.

[0032] The semicircular arc groove 23 is arranged in an inclined state, the groove surface gradually rises from one end to the other end, at the highest point of the semicircular arc groove 23, a friction strip 24 is embedded along the groove length direction, the friction strip 24 is made of a wear-resistant conductive material with lower hardness than the outer wall of the contact roller 21.

[0033] The working principle of the embodiment is as follows: when the movable contact group 9 separates from the fixed contact group 10, the movable contact group 9 moves upward under the action of the return spring 8, simultaneously driving the mounting wall 15 to move upward, the mounting wall 15 extrudes the bottom surface of the folding air bag 14, and the organ-like wrinkle structure is compressed upward; at this time, the gas in the folding air bag 14 is quickly extruded, and high-speed airflow is sprayed from the flat air outlet through the air outlet pipe 18, the airflow precisely hits the electric arc generated between the movable contact group 9 and the fixed contact group 10, which can not only use the impact force of the airflow to lengthen and blow away the electric arc, but also can take away the heat generated by the electric arc through the airflow, so as to quickly extinguish the electric arc and reduce the temperature of the contact point, effectively reducing the ablation of the contact point by the electric arc, improving the service life and working safety of the contactor. When the movable contact group 9 moves downward and contacts with the fixed contact group 10, the folding air bag 14 naturally unfolds with the downward movement of the mounting wall 15, and the inside reabsorbs air, preparing for the next arc extinguishing action.

[0034] When the movable contact group 9 drives the contact roller 21 to move down and contact the contact pad 22 of the fixed contact group 10, the contact roller 21 first contacts the higher side of the semicircular groove 23, and then rolls up along the inclined groove surface as the downward movement continues, until it reaches the highest point and contacts the friction strip 24. Due to the friction of the friction strip 24, the contact roller 21 will rotate a small angle during this process. Through this small rotation of the contact roller 21 each time it contacts, the contact position of the contact roller 21 and the contact pad 22 can be evenly alternated, avoiding local excessive wear due to long-term stress and friction, thereby prolonging the service life of the contact group and improving the stability of the contactor operation.

[0035] The rest of the structure is the same as that of Example 1.

[0036] Example 3, refer to Figures 10-12 , this is the third embodiment of the application, which is different from the second embodiment: a pin 26 is provided in the interior of the moving iron core 4, and a hook rod 27 is connected to the side wall of the pin 26 by hinging or integral forming. The hook rod 27 is made of elastic metal material, and its free end is L-shaped, with an elastic pre-tightening force bending to one side. Correspondingly, a locking plate 28 is vertically fixed on the inner wall of the coil support 5, and a right triangle recess 29 is formed on the side of the locking plate 28 facing the hook rod 27. The two right angle sides of the recess are arranged in vertical and horizontal directions respectively. Inside the right triangle recess 29, a obtuse triangle convex island 30 is integrally formed, with one long side parallel to the oblique side of the recess and a certain gap, and the other short side inclined to the inner side of the recess. At the lowermost side of the obtuse triangle convex island 30, an inwardly recessed clamping groove 31 is provided, and at the edge of the right triangle recess 29 corresponding to the clamping groove 31, a clamping rod 32 is protruded inwardly, and the position of the clamping rod 32 is just able to form a cooperative limiting with the hook end of the hook rod 27.

[0037] When the coil winding 6 is in an open circuit state, the hook end of the hook rod 27 at its lower end is tightly attached to the longest side of the obtuse triangle convex island 30, maintaining the initial standby state. When the coil winding 6 is in a closed circuit state, as the moving iron core 4 moves downward, the hook rod 27 moves downward synchronously with the pin 26, and its hook end gradually slides along the longest side of the obtuse triangle convex island 30, and finally embeds into the clamping groove 31, forming a lock with the clamping rod 32.

[0038] This cooperation structure of the hook rod 27 and the locking plate 28 constitutes a mechanical locking device, and the core action is that the end of the hook rod 27 slides along the edge of the obtuse triangle convex island 30, and is locked in the clamping groove 31 through a single downward movement, and when pressed again, it can be unlocked from the clamping groove 31 and reset.

[0039] The working principle of the embodiment is as follows: When the coil winding 6 is powered, the electromagnetic force generated drives the static iron core 7 to generate suction force to pull the moving iron core 4 downward against the elastic force of the return spring 8. In the process of the moving iron core 4 moving downward, the hook rod 27 moves downward synchronously with the pin rod 26, and the hook end thereof slides along the longest side of the obtuse triangle convex island 30 while being elastically deformed due to the extrusion of the convex island. When the moving iron core 4 is attracted to the position, the hook end of the hook rod 27 is just slid into the clamping slot 31, and is clamped with the clamping rod 32 under the action of its own elastic force, thereby forming a stable locking state.

[0040] After entering the holding state, the coil winding 6 can be immediately powered off. At this time, the attraction state of the contactor is no longer dependent on the electromagnetic force, but is continuously maintained by the physical locking structure of the mechanical lock, thereby ensuring the stable connection of the main circuit.

[0041] The breaking process is as follows: when the main circuit needs to be broken, only a short current pulse needs to be applied to the coil winding 6. The electromagnetic force generated by the pulse drives the static iron core 7 again, and the moving iron core 4 is again attracted downward against the elastic force of the return spring 8. At the moment when the moving iron core 4 is attracted to the position, the hook rod 27 continues to move downward with the moving iron core 4, and the hook end thereof is detached from the clamping slot 31 and slides upward along the second longest side (inclined side) of the obtuse triangle convex island 30. After being released from the constraint of the convex island, the hook rod 27 is reset to the initial position under the action of its own elasticity. Once the mechanical locking is released, the elastic force of the return spring 8 rapidly pulls the moving iron core 4 back upward, thereby driving the movable support 3 and the movable contact group 9 to reset, and realizing the breaking of the main contact.

[0042] The advantages of the mechanical locking structure are as follows: first, the maintenance power consumption and heat can be significantly reduced, the coil does not need to be continuously powered after being attracted, and the energy consumption loss caused by the long-term power supply of the coil of the traditional contactor is fundamentally avoided; second, the alternating current noise can be eliminated, and the “hum” sound problem of the traditional alternating current contactor during operation is completely solved due to the absence of continuous electromagnetic force pulsation; third, the anti-vibration performance is improved, the rigid connection of the mechanical lock can effectively resist external vibration interference, and the stability of the attraction state is ensured; and fourth, the service life is potentially prolonged, the power-on time of the coil is greatly reduced, the aging speed of the coil caused by long-term heating is reduced, and the overall durability of the contactor is improved.

[0043] It should be noted that the above embodiment is only used to illustrate the technical solutions of the present application but not limit the present application. Although the present application has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solutions of the present application can be modified or replaced equivalently without departing from the spirit and scope of the present application, and all of them should be covered in the scope of the claims of the present application.

Claims

1. A multifunctional contactor, comprising an upper housing (1) and a base (2) connected to the upper housing (1), characterized in that: A movable bracket (3), a movable iron core (4), a coil bracket (5), a coil winding (6), and a static iron core (7) are arranged in the upper shell (1) and the base (2) from top to bottom, wherein the coil bracket (5), the coil winding (6), and the static iron core (7) are fixed in the base (2), the coil bracket (5) is sleeved on the static iron core (7), a return spring (8) is arranged between the coil bracket (5) and the movable iron core (4), the movable bracket (3) is connected to the movable iron core (4) and slides in the upper shell (1), and a plurality of movable contact groups (9) are arranged in parallel on the movable bracket (3), and fixed contact groups (10) are arranged on both sides of each movable contact group (9); Symmetrical shaft frames (19) are provided on both sides of the end of the movable contact group (9), a support shaft (20) is connected between the pair of shaft frames (19), a contact roller (21) is rotatably provided on the support shaft (20), and a contact pad (22) is provided at the end of the fixed contact group (10) corresponding to the movable contact group (9), a semicircular arc groove (23) is provided on the contact pad (22), and the semicircular arc groove (23) matches the contact roller (21); The movable iron core (4) is provided with a pin rod (26), and a hook rod (27) is provided on the pin rod (26). The hook rod (27) is elastic. A locking plate (28) is provided on the inner wall of the coil bracket (5). A right-angled triangle groove (29) is provided on the locking plate (28). An obtuse-angled triangle convex island (30) is provided in the right-angled triangle groove (29). A clamping groove (31) is provided on the lowermost side of the obtuse-angled triangle convex island (30). A clamping rod (32) is provided at the edge of the right-angled triangle groove (29) corresponding to the clamping groove (31). When the coil winding (6) is disconnected, the lower end of the hook rod (27) is in close contact with the longest side of the obtuse-angled triangle convex island (30). When the coil winding (6) is open, the lower end of the hook rod (27) slides along the longest side of the obtuse-angled triangle convex island (30) into the clamping groove (31).

2. The multifunctional contactor according to claim 1, characterized in that: The movable bracket (3) is provided with a mounting groove (11), and a movable contact spring (12) is provided in the mounting groove (11). The movable contact spring (12) presses the movable contact group (9) against the bottom of the mounting groove (11).

3. The multifunctional contactor according to claim 1, characterized in that: An arc extinguishing hood (13) is provided at the end of each movable contact group (9), and the arc extinguishing hood (13) has a U-shaped cross section.

4. The multifunctional contactor according to claim 3, characterized in that: A folding airbag (14) is provided in the arc extinguishing cover (13), a mounting wall (15) is provided on the lower end surface of the folding airbag (14), the mounting wall (15) is connected to the movable contact group (9), a hanging ear (16) is provided on the upper end surface of the folding airbag (14), a supporting sheet (17) is provided on the inner wall of the arc extinguishing cover (13), the hanging ear (16) is passed through the supporting sheet (17), the upper end surface of the folding airbag (14) is connected to an air outlet pipe (18), and the other end of the air outlet pipe (18) extends to the fixed contact group (10).

5. The multifunctional contactor according to claim 1, characterized in that: The semi-circular arc groove (23) is arranged obliquely, and a friction strip (24) is provided at the highest point of the semi-circular arc groove (23).

6. The multifunctional contactor according to claim 1, characterized in that: The movable contact group (9) is provided with an arc-shaped groove (25), and the arc-shaped groove (25) is in contact with the outer wall of the contact roller (21).

7. The multifunctional contactor according to claim 1, characterized in that: A support plate (33) is provided inside the static iron core (7), and the support plate (33) is engaged with the base (2).

8. The multifunctional contactor according to claim 1, characterized in that: A spring piece (34) is inserted into the movable iron core (4), and the spring piece (34) is connected to the movable bracket (3).

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