CN117672776A - Driving structure of moving contact assembly and switch - Google Patents

Abstract

The movable contact assembly comprises a contact support, a movable contact and a contact spring, wherein the contact support is provided with a contact cavity penetrating through the contact support, two ends of the contact cavity are respectively provided with a first opening and a second opening, the movable contact comprises two movable contact pieces which are arranged side by side, the size of the first opening of the contact cavity is smaller than the inner diameter size of the contact cavity, the size of the first opening is smaller than the size of the second opening, the two movable contact pieces are respectively provided with a movable contact, one end provided with the movable contact extends out of the first opening, the contact spring is arranged in the contact cavity from the second opening and acts between the movable contact and the side wall of the contact cavity, and the driving structure of the switch comprises the movable contact assembly, and is high in reliability and current-carrying capacity and simple to assemble.

Description

Driving structure of moving contact assembly and switch

Technical Field

The invention relates to the field of piezoelectric devices, in particular to a driving structure of a moving contact assembly and a switch.

Background

The current-carrying capacity of the movable contact of the existing switch is low or the size is large, and for a movable contact structure with a plurality of movable contact pieces and movable contacts, the assembly structure is complex, particularly the assembly and positioning structure of a contact spring, so that the assembly efficiency is low.

Most of the existing switching devices such as circuit breakers adopt a single-contact structure, the electric repulsive force capacity of the existing switching devices is poor, and faults such as fusion welding and the like can occur frequently. And the contact resistance of the single contact is high, and the contact reliability is poor.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provides a driving structure of a moving contact assembly and a switch.

In order to achieve the above purpose, the invention adopts the following technical scheme:

the utility model provides a moving contact subassembly, includes contact support, moving contact and contact spring, the contact support is equipped with the contact cavity that runs through the contact support, the both ends of contact cavity are first opening and second opening respectively, the moving contact is including two moving contact pieces that set up side by side, the first open-ended size of contact cavity is less than the internal diameter size of contact cavity, and the size of first open-ended size is less than the size of second open-ended, and two moving contact pieces all are equipped with the moving contact, and are equipped with the one end of moving contact and stretch out from first opening, and contact spring is packed into in the contact cavity from the second opening, acts between moving contact and contact cavity lateral wall.

Preferably, the cavity side wall bulge is arranged in the contact cavity, the cavity side wall bulge is close to the first opening, and the middle part of the movable contact piece is abutted against the cavity side wall bulge under the action of the contact spring, so that the movable contact piece can rotate based on the cavity side wall bulge as a fulcrum.

Preferably, the two movable contact pieces are arranged at intervals side by side, a fourth bulge is arranged on the side edge of the two movable contact pieces, which is far away from each other, and the fourth bulge is positioned on the inner side of the contact cavity and is abutted with the side wall of the first opening, so that the position of the brake contact piece extending out of the contact cavity is limited.

Preferably, one end of the movable contact is provided with a sixth bulge, the movable contact is welded on one end side surface of the movable contact against the sixth bulge, the sixth bulge is closer to the end of the movable contact relative to the movable contact, and the sixth bulge is provided with an arc striking end in an outward extending mode.

Preferably, the other end of the movable contact piece is provided with a fifth bulge for limiting and matching with the contact spring.

Preferably, the contact spring is formed by integrally connecting two rotating bodies, the two rotating bodies are respectively provided with two elastic arms, one elastic arm of each of the two rotating bodies is bent and connected with each other to form a connecting part, and the other elastic arms of the two rotating bodies are oppositely arranged at intervals to form two elastic arms; the connecting part of the contact spring acts on the contact support, and the two elastic arms act on the two movable contact pieces respectively.

Preferably, the axial end of the contact support is provided with a rotary mounting structure, the contact cavity penetrates through the contact support along the radial direction of the contact support, and the contact support is further provided with a second connecting hole for connecting the connecting rod.

Preferably, a second protrusion and a third protrusion are arranged on the radial direction of the contact support, the second connection hole is arranged on the second protrusion, the third protrusion is arranged adjacent to the first opening and is positioned on one side of the first opening, which is close to the movable contact, and the movable contact is arranged on the movable contact.

The invention also provides a driving structure of the switch, which comprises an electric operating mechanism and the moving contact assembly, wherein the electric operating mechanism comprises a motor, a gear set and a transmission mechanism, the motor drives the transmission mechanism through the gear set, and the transmission mechanism is connected with the moving contact assembly.

Preferably, the electric control device further comprises an electric control shell, the gear set and the transmission mechanism are arranged in the electric control shell, the motor and the contact support are arranged on the electric control shell, and one end of the moving contact assembly, provided with the moving contact, extends out of the electric control shell.

The movable contact of the movable contact assembly is provided with the two movable contact pieces, so that the contact reliability and the current-carrying capacity of the contact can be improved, meanwhile, the electric repulsive force can be reduced to enable the contact to be unnecessarily repelled to cause fusion welding, the two movable contact pieces are simple to assemble and are inserted into a contact cavity supported by the contact, the contact spring is arranged in the contact cavity through the second opening, and the movable contact pieces are limited by the contact spring and the first opening, so that a reliable assembly is formed.

In addition, the cavity side wall bulge is arranged in the contact cavity, so that the movable contact piece can rotate based on the cavity side wall bulge as a fulcrum. And a third bulge is arranged on the radial direction of the contact support and is used for supporting the movable contact and increasing the electric gap between the movable contact and the fixed contact.

In addition, be equipped with the sixth arch on the movable contact, the sixth arch is closer to the tip of movable contact relative to the movable contact, protects the movable contact and can strengthen the connection of movable contact.

The driving structure of the switch has simple structure, reliable transmission and small volume, so that the volume of the switch is small, the reliability of the switch is greatly improved, and the service life of the switch is greatly prolonged.

In addition, the driving structure of the switch is integrated with the operating mechanism and the moving contact assembly, and the driving structure is installed in the switch after forming a driving module, so that the reliability is high, the assembly efficiency is high, and the automatic assembly of the switch is convenient.

Drawings

FIG. 1 is a schematic view of the overall structure of a first embodiment of the switch of the present invention;

FIG. 2 is an exploded schematic view of the overall structure of a first switch embodiment of the present invention;

FIG. 3 is a schematic view of the internal structure of a first switch embodiment of the present invention showing the structure of one side of the first electrical actuator embodiment;

FIG. 4 is another internal schematic view of a first embodiment of the switch of the present invention showing the configuration of the other side of the first embodiment of the electrical actuator;

FIG. 5 is a schematic illustration of a switch of the present invention with one side of the electrically operated housing removed;

FIG. 6 is a schematic side view of a second embodiment of an electrical actuator within a housing of a switch of the present invention;

FIG. 7 is a schematic diagram of another side structure of a second embodiment of an electrical actuator within a housing of a switch of the present invention;

FIG. 8 is a schematic side view of the output gear and lever of the switching mechanism of the present invention;

FIG. 9 is another side schematic view of the output gear and lever of the switching mechanism of the present invention;

FIG. 10 is a cross-sectional view of the moving contact assembly of the switch of the present invention;

FIG. 11 is a schematic view of the structure of the moving contact assembly of the switch of the present invention;

FIG. 12 is a schematic view of the structure of the moving contact and contact spring of the moving contact assembly of the switch of the present invention;

FIG. 13 is a schematic view of the overall structure of a second switch embodiment of the present invention;

FIG. 14 is a schematic view showing the internal structure of a second embodiment of the switch of the present invention;

Detailed Description

Specific embodiments of the switch of the present invention are further described below with reference to the examples shown in the drawings. The switch of the present invention is not limited to the description of the following embodiments.

As shown in fig. 1-5, an embodiment of an intelligent switch disclosed by the invention comprises a shell 1, an electric operating mechanism 3 and at least one phase circuit, wherein the electric operating mechanism 3 and the at least one phase circuit are arranged in the shell 1, each phase circuit comprises a moving contact assembly, a fixed contact 220, a first wiring terminal 21 and a second wiring terminal 22, the moving contact assembly comprises a contact support 53 and a moving contact 530, the first wiring terminal 21 and the second wiring terminal 22 are respectively connected with the moving contact 530 and the fixed contact 220, the electric operating mechanism 3 is connected with the contact support 53 of the at least one phase circuit, the moving contact 530 is driven to contact and separate from the fixed contact 220 to realize the closing and breaking control of the switch, one end of the first wiring terminal 21 and one end of the second wiring terminal 22 are respectively connected with the moving contact 530 and the fixed contact 220, and the other end of the first wiring terminal 22 is used for wiring; the electric operator 3 is provided with corresponding control terminals 310 for receiving control signals. The first terminal 21 and the second terminal 22 are described, one of which is a wire inlet terminal and the other of which is a wire outlet terminal.

The switch of this embodiment is a novel intelligent switch, adopts electric operating mechanism 3 to drive moving contact 530, does not adopt traditional operating mechanism with hasp and jump knot, does not set up promptly with operating mechanism mechanical transmission's button or handle either, but carries out closure and breaking control through analog signal button 50 or external control signal, its simple structure, small reliability height.

Preferably, the switch further comprises a current acquisition device 7 for acquiring a current signal of the switch.

As shown in fig. 1-5, the first terminal 21 and the second terminal 22 are both provided at one end of the switch. The connection terminals 21 and 22 may be provided inside the switch, and a connection terminal 23 (see fig. 3) is connected thereto, and an external copper bar is connected to the connection terminal 23 in a pluggable manner. Alternatively, the first terminal 21 and the second terminal 22 may extend out of the switch, and the portion extending out of the housing 1 is a terminal structure, and is connected to an external busbar clamp in a pluggable manner. In addition, the user can set corresponding wiring terminals 23 on the parts of the first wiring terminal 21 and the second wiring terminal 22 extending out of the switch according to the needs so as to match different wiring modes or can directly connect wires without setting the wiring terminals 23.

The intelligent switch replaces the original common switch, so that the current carrying capacity and reliability are greatly improved, and intelligent control is improved. The switch adopts the electric operating mechanism 3 to drive the movable contact 530, and the electric operating mechanism 3 can be controlled by the control terminal 310 to realize the on-off control of the intelligent switch, and the first terminal 21 and the second terminal 22 are used for connecting the main loop, so that the intelligent switch has a simple structure, a small volume and high reliability.

As shown in fig. 1-5, in the first embodiment, the switch of the present embodiment is a single-phase switch, and only one phase circuit, that is, includes a group of moving contact assemblies, a fixed contact 220, a first terminal 21, and a second terminal 22; the electric operating mechanism 3 is connected with a moving contact assembly of a phase circuit, the electric operating mechanism 3 comprises a motor 31, a gear set 30 and a transmission mechanism 5, the moving contact assembly comprises a moving contact 530 arranged on a contact support 53, the motor 31 drives the transmission mechanism 5 through the gear set 30, the transmission mechanism 5 is connected with the contact support 53, the moving contact 530 is driven to contact with and separate from a fixed contact 220, the moving contact 530 is arranged opposite to the fixed contact 220, one ends of a first wiring terminal 21 and a second wiring terminal 22 are respectively connected with the moving contact 530 and the fixed contact 220, and the other ends are used for wiring. The first wiring terminal 21 is connected with the moving contact 530, and the second wiring terminal 22 is connected with the fixed contact 220; alternatively, the first terminal 21 may be connected to the fixed contact 220, and the second terminal 22 may be connected to the movable contact 530. The present embodiment uses the first terminal 21 as the inlet terminal and the second terminal 22 as the outlet terminal, although it is possible to interchange the terminals as required.

Preferably, as shown in fig. 3-5, the switch is further provided with current acquisition means 7 for acquiring a current signal of the switch. Preferably, the current collecting means 7 is arranged at the inlet terminal, and the current collecting means 7 is coupled to the first terminal 21. Further, it is preferable that the current collecting means 7 of the present embodiment is a current transformer through which the first terminal 21 passes. Of course, as another embodiment, the current collecting device 7 may be a shunt, preferably a manganese-copper alloy shunt, and the first terminal 21 is integrally formed with the shunt.

As shown in fig. 5 and 7, the intelligent switch of the embodiment adopts the electric operating mechanism 3 to drive the moving contact 530, does not provide a traditional operating mechanism with a lock catch and a jump buckle, does not provide an external operating handle or button, and can control the electric operating mechanism 3 through the control terminal 310 to realize the on-off control of the intelligent switch, and has simple structure, small volume and high reliability.

Preferably, as shown in fig. 3-5, the switch is further provided with an arc extinguishing mechanism 6, the arc extinguishing mechanism 6 includes an arc extinguishing chamber 60, and the arc extinguishing chamber 60 is arranged corresponding to the moving contact 530 and the fixed contact 220, and is used for extinguishing an arc generated when the moving contact 220 and the fixed contact 220 are separated, so that the circuit bearing capacity of the switch can be improved. Of course, as another embodiment, the arc extinguishing mechanism 6 may not be provided.

As shown in fig. 6-7, the gear set 30 includes an output gear 33 and a plurality of transmission gears 32, the motor 31 drives the output gear 33 through the transmission gears 32, and the output gear 33 is in driving engagement with the transmission mechanism 5. The transmission gear 32 of the present embodiment includes a first transmission gear fitted over the output shaft of the motor 31, the first transmission gear directly driving the output gear 33, and as other embodiments, a plurality of second transmission gears that transmit between the first transmission gear and the output gear 33 may be included. Preferably, each gear of the gear set, including the output gear 33 and the transmission gear 32 are all straight gears, and teeth are arranged on radial side walls of the output gear 33 and the transmission gear 32, so that the transmission is simple and reliable. Of course, bevel gears or bevel gears are also possible as other embodiments. The number of the transmission gears 32 can be adjusted as required.

As shown in fig. 3-7, the transmission mechanism 5 includes a lever 51 and a connecting rod 52, the moving contact assembly includes a contact support 53 and a moving contact 530 disposed on the contact support 53, the lever 51 and the contact support 53 are rotatably disposed, the connecting rod 52 is connected between the lever 51 and the contact support 53, the lever 51 is in driving fit with the output gear 33, the moving contact 530 is mounted on the contact support 53, the output gear 33 drives the lever 51 to rotate, the lever 51 drives the contact support 53 to rotate through the connecting rod 52, and the contact support 53 rotates to drive the moving contact 530 to swing, so as to realize the closing and opening actions of the switch.

Preferably, the transmission mechanism 5 is composed of a lever 51 and a connecting rod 52, only the lever 51 and the connecting rod 52 are provided, the lever 51 is connected with the output gear 33, the connecting rod 52 is connected between the lever 51 and the contact support 53, the structure is very simple, no complex structure exists, and the transmission is reliable and the volume is small. Of course, as a modified embodiment, other transmission links may be added; or the contact support 53 is directly driven by the lever 51, for example, the lever 51 extension projection is provided with an integral driving arm which is inserted into the driving groove of the plug support 53 to be engaged.

Preferably, the moving contact assembly further comprises a contact supporting spring 54, the contact supporting 53 is installed in the shell 1 through the contact supporting spring 54, and the acting force of the contact supporting spring 54 drives the contact supporting 53 to rotate towards the breaking position, so that a control circuit can be simplified. Of course, as other embodiments, the contact support spring 54 may not be provided.

As shown in fig. 2, the switch housing 1 of the present embodiment includes a first housing 11 and a second housing 12, where the first housing 11 and the second housing 12 are fastened together to form the switch housing 1, and the two housings are fastened together to form an integral housing 1. The electric operating mechanism 3 is arranged at one end of the shell 1 and is mainly positioned in the second shell 12, the phase circuit is arranged at the other end of the shell 1 and is mainly covered by the second shell 11, so that a control circuit of the electric operating mechanism 3 is far away from a wiring terminal of a main circuit of the switch, and weak current and strong current are separated.

Preferably, the electric operating mechanism 3 comprises an electric operating shell 8, a motor 31, a gear set 30 and a transmission mechanism 5 are arranged in the electric operating shell 8, and the electric operating shell 8 is installed in the shell 1 after the electric operating mechanism 3 is assembled into an integral driving module, so that the assembly efficiency is high, and the insulation property is improved. As a preferred embodiment, the contact support 53 is also mounted on the electric operation housing 8, the contact support 53 is at least partially mounted in the electric operation housing 8, and one end of the moving contact 530 provided with the moving contact extends out of the electric operation housing 8 to be matched with the fixed contact 220.

Referring to fig. 3-5, in the first embodiment of the electric actuator 3, the motor 31 is disposed at one end of the housing, the first terminal 21 and the second terminal 22, which are the lead-in terminal and the lead-out terminal, are disposed at the other end of the housing 1 at the same time, the first direction from the end of the housing 1 where the motor 31 is disposed to the end where the lead-in terminal and the lead-out terminal are also the height direction of the housing 1, the motor 1 is disposed above the lever 51 and the output gear 33 (not shown in the drawing), the lever 51 is located between the motor 1 and the contact support 53, the link 52 is connected between the lever 51 and the contact support 53, and the ends of the first terminal 21 and the second terminal 22 for wiring each extend in the first direction of the housing 1 from the end far from the motor 31. In this embodiment, the first terminal 21 and the second terminal 22 are both disposed at the other end of the housing, which is advantageous not only for wiring but also for simplifying the structural layout, and simultaneously for keeping strong current away from weak current. Of course, as other embodiments of the deterioration, the first terminal 21 and the second terminal 22 may not be provided on the same end side wall.

As shown in fig. 6 to 7, the second embodiment of the electric actuator 3 is different from the first embodiment in the assembly positions of the motor 31 and the lever 51. In the second embodiment, the lever 51 is disposed at one end of the housing 1, away from the first terminal 21 and the second terminal 22, and the motor 31 is disposed between the lever 51 and the first terminal 21. In the height direction, the lever 51 and the output gear 33 are arranged above the motor 31, the motor 1 is arranged between the lever 51 and the contact support 53, the connecting rod 52 is connected between the lever 51 and the contact support 53, the output shaft of the motor 31 is parallel to the axial direction of the lever 51, the lever 51 and the output gear 33 are coaxially arranged, and the transmission gear on the output shaft of the motor 31 is directly in driving fit with the output gear 33. Referring to fig. 7, the other end of the lever 51 remote from the output gear 33 is connected to a link 52, and the link 52 is connected to a contact support 53. Preferably, as shown in fig. 5 and 7, the electric operating mechanism 3 further includes a control circuit 4, and the motor 31 is connected to the control circuit 4, and receives a control signal through the control circuit 4 and controls the motor 31 to rotate forward, backward and/or stop to drive the gear set 30 and the transmission mechanism 5. Preferably, the control circuit comprises at least one micro-switch for monitoring the position of the gear set 30 and/or the transmission 5 for accurate closing and opening control. Preferably, the control circuit 4 includes a circuit board 40, the components such as the micro switch and the diode are mounted on the circuit board 40, so as to facilitate assembly, and the control terminal 310 may also be disposed on the circuit board 40 and extend out of the housing 1, so as to facilitate wiring. Referring to fig. 2, a communication interface hole is provided in the housing 1 for the control terminal 310 of the electric actuator 3 to protrude. Preferably, as another embodiment, the control terminal 310 may be connected to the circuit board 40 by a wire, and the wire extends out of the housing 1 and is connected to a controller of the distribution box. Preferably, the control terminal 310 and the external controller can be connected by plugging in a plug-in terminal.

As shown in fig. 3 to 5, the electric operating mechanism 3, the movable contact assembly, the fixed contact 220, and the first terminal 21 and the second terminal 22 as the in-out terminals are sequentially arranged in the first direction, i.e., the height direction of the housing 1, and the arc extinguishing mechanism 6 is disposed between the first terminal 21 and the second terminal 22 in the second direction, i.e., the length direction of the housing 1. The switch of this embodiment adopts electric operating mechanism 3 to drive moving contact 530, can control electric operating mechanism 3 through control signal and realize the closed and break control of switch main loop, and set up the arc extinguishing mechanism and improve circuit bearing capacity, set up electric operating mechanism 3 and the first wiring end 21 and the second wiring end 22 that are the wiring of switch main loop respectively at the both ends of shell 1 moreover, not only do benefit to the wiring but also do benefit to the simplification structural layout, keep away from the weak current with the strong current.

Preferably, as shown in fig. 3 to 5, the electric operating mechanism 3 includes a motor 31, a gear set 30, a control circuit 4 and a transmission mechanism 5, the motor 31 is disposed at one end of the housing 1 in the height direction, the first terminal 21 and the second terminal 22 are disposed at the other end of the housing 1 in the height direction side by side at intervals, the gear set 30, the transmission mechanism 5 and the control circuit 4 are stacked in a third direction, that is, the width (i.e., thickness) direction of the housing 1, and are disposed between the arc extinguishing mechanism 6 and the motor 31 in the first direction, the arc extinguishing mechanism 6 is disposed between the moving contact assembly and the other end of the housing 1 provided with the first terminal 21 and the second terminal 22 in the first direction, the arc extinguishing mechanism 6 is disposed between the first terminal 21 and the second terminal 22 in the second direction, the moving contact assembly is connected with the transmission mechanism 5 in the first direction, the moving contact assembly is disposed between the transmission mechanism 5 and the corresponding arc extinguishing mechanism 6 in the first direction, the end of the fixed contact 220 provided with the fixed contact is disposed in correspondence with the one end of the corresponding moving contact 530 provided with the moving contact, the arc extinguishing chamber 60 is disposed in the third direction, that the arc extinguishing mechanism 6 includes the arc extinguishing chamber 60, and the arc extinguishing chamber 60 is disposed in the second direction, that is the length direction 220 of the housing 1 is disposed in the corresponding third direction, and perpendicular to each other. The gear set 30, the transmission mechanism 5 and the control circuit 4 of the present embodiment are stacked in sequence along the third direction, the structure is compact, the volume of the switch is reduced, the transmission mechanism 5 is located between the gear set 30 and the control circuit 4, and of course, the relationship between the three can be adjusted as required, for example, the gear set 30 is located in the middle. The axial direction of the output shaft of the motor 1 is arranged in a third direction.

Preferably, as shown in fig. 3-7, a partition 81 is provided in the housing 1 to separate the transmission mechanism 5 from the gear set 30 and/or the control circuit 4, and the lever 51 and the contact support 53 are rotatably mounted on the partition 81, and insulation and reliability are improved by the partition 81. The electric operation housing 8 of the present embodiment includes a partition plate 81, an electric operation first housing 82 and an electric operation second housing 83, the electric operation first housing 82 and the electric operation second housing 83 are respectively located at two sides of the partition plate 81, the partition plate 81 and the electric operation first housing 82 are oppositely arranged to form an electric operation first space for assembling the gear set 30, and the partition plate 81 and the electric operation second housing 83 are oppositely arranged to form an electric operation second space for assembling the transmission mechanism 5 and the control circuit 4; the contact support 53 and the moving contact 530 are also installed in the second space of the electric operation, one end of the moving contact 530 provided with the moving contact extends out of the electric operation shell 8, the partition board 81, the first electric operation shell 82 and the second electric operation shell 83 are fixedly connected and then assembled into the shell 1, and a moving contact avoiding hole for the moving contact 530 to penetrate out is formed in the electric operation shell 8.

As another embodiment, the electric operation first casing 82, the electric operation second casing 83, and the partition 81 may be omitted, and the components may be directly mounted in the casing 1, and may be positioned and mounted by a structure on a side wall of the casing 1. Or only set up the baffle 81, the baffle 81 can dismantle with shell 1 and be connected be equipped with motor fixed knot on the baffle 81 and construct, can install shell 1 again after assembling motor 31 and baffle 81 in, it is fixed with motor 31 through baffle 81 and shell 1 cooperation, convenient assembling is efficient, and the reliability is high.

Preferably, referring to fig. 1, the housing 1 includes a first housing 11 and a second housing 12, where the first housing 11 and the second housing 12 are fastened relatively to form the housing 1 of the switch. The engagement direction of the first housing 11 and the second housing 12 is preferably the first direction, but may be the second or third direction. The first shell 11 and/or the second shell 12 are/is provided with a pressing convex rib which presses the partition board 81 or the electric operation shell 8 when being buckled, and/or the first shell 11 and/or the second shell 12 are/is provided with a buckling structure which is matched with the partition board 81 or the electric operation shell 8 in a clamping way, and the first shell 11 and/or the second shell 12 are/is fixedly connected with screws, so that the shell 1 and the partition board 81 or the electric operation shell 8 can be detachably installed.

Preferably, as shown in fig. 8-9, in a preferred embodiment in which the output gear 33 of the present embodiment is in driving engagement with the lever 51, the output gear 33 of the present embodiment is in driving engagement coaxially disposed with the lever 51. The lever 51 is provided with a first connecting hole 512 for connecting the connecting rod 52, at least one limiting protrusion 511 matched with the output gear 33 and a first protrusion 510, the limiting protrusion 511 is convexly arranged on the end face of the lever 51, which is close to one end of the output gear 33, the first protrusion 510 is convexly arranged on the radial side wall of the connecting rod 52, and the lever 51 triggers the micro switch K to switch when rotating to the driving switch closing and/or driving switch breaking position.

The output gear 33 is provided with at least one driving protrusion 330 matched with the lever 51, the driving protrusion 330 is arranged on the end surface of the output gear 33 close to one end of the lever 51, and a first tooth 331 is arranged on the radial side wall of the output gear 33 and is used for being meshed with the transmission gear 32. The output gear 33 and the lever 51 are coaxially assembled, the driving protrusion 330 and the limiting protrusion 511 are arranged in a staggered mode, the transmission gear 32 drives the output gear 33 to rotate through the first tooth 331, and when the driving protrusion 330 and the limiting protrusion 511 are limited by rotation of the output gear 33, the lever 51 is driven to rotate, and the lever 51 is driven to rotate between a lever closing position and a lever breaking position. The lever 51 of this embodiment is provided with two limiting protrusions 511 on both sides of the rotation axis of the lever 51, the driving protrusion 330 drives the lever 51 to rotate towards the lever closing position by one limiting protrusion 511, and drives the lever 51 to rotate towards the lever breaking position by the other limiting protrusion 511, and the rotation direction of the lever 51 towards the lever closing position is opposite to the rotation direction of the lever breaking position. The output gear 33 is also provided with two driving protrusions 330, although it is also possible to provide one driving protrusion 330 and one limiting protrusion 511.

The connecting rod 52 is a U-shaped rod, one end of which is inserted into the first connecting hole 512 of the lever 51, and the other end of which is inserted into the second connecting hole 533 of the contact support 53, and the two are linked.

The output gear 33 of the present embodiment is disposed coaxially with the lever 51, so that the occupied space can be reduced. As another embodiment, the output gear 33 and the lever 51 may not be coaxially disposed, for example, the axes of the output gear 33 and the lever 51 may be disposed in parallel with each other, the output gear 33 may be radially provided with a first gear 331, and the lever 51 may be radially provided with a lever gear, and the first gear 331 and the lever gear may be engaged with each other for transmission. In addition, as other embodiments, the output gear 33 and the lever 51 may be driven by gear engagement, and the first gear 331 of the output gear 33 and/or the lever gear of the lever 51 may be a sector gear, and when the lever 51 is driven to rotate to the lever closing position or the lever breaking position, the output gear 33 and the lever 51 may be disengaged, so that the micro switch K may not be provided, and the control circuit may drive the motor to rotate for a preset time according to the control signal to realize the control of closing and breaking.

Preferably, in order to achieve accurate control of closing and opening, the control circuit 4 of the electric operating mechanism 3 is further provided with at least one micro switch K, and when the output gear 33 or the lever 51 or the contact support 53 rotates to a position for closing and/or opening the driving switch, the micro switch K is triggered to switch to monitor the position state of the gear set 30 and/or the transmission mechanism 5 and/or the contact support 53, or to monitor the closing state or opening state of the switch. In this embodiment, when the switch is in the closed state, i.e. the lever 51 is turned to the lever closed position, the first protrusion 510 on the lever 51 acts on the micro switch K; when in a breaking state, the first protrusion 510 on the lever 51 avoids the micro switch K. As other embodiments, the output gear 33 or the contact support 53 may act on the microswitch K. As another embodiment, two micro switches may be provided, when the switch is in the closed state, the gear set 30 and/or the transmission mechanism 5 and/or the contact support 53 acts on one micro switch to avoid the other micro switch, and when the switch is in the breaking state, the gear set 30 and/or the transmission mechanism 5 and/or the contact support 53 avoids the one micro switch to act on the other micro switch.

The switch of this embodiment does not adopt traditional operating mechanism with lock catch and jump button, does not set up button or handle, and drive mechanism 5 only passes through control circuit control, and control circuit does not have the intervention of manual closure breaking operation for control circuit simple structure, external equipment such as block terminal etc. through the positive rotation and the reversal of change input power supply's polarity direction control motor, and the switch is closed or is broken the back control circuit automatic cutout, only needs a micro-gap switch K to realize the control of switch closure and breaking, does benefit to the reduction switch volume and simplifies micro-gap switch K's trigger structure.

As shown in fig. 3-5 and 10, the moving contact assembly comprises a contact support 53, a moving contact 530 and a contact spring 535, wherein the moving contact 530 is connected with the contact support 53 through the contact spring 535 to realize over travel. The contact support 53 of this embodiment is provided with a contact cavity 534, the moving contact 530 extends into the contact cavity 534, and one end provided with the moving contact extends out of the contact cavity 534, and a contact spring 535 is installed in the contact cavity 534 and acts between the moving contact 530 and the side wall of the contact cavity 534 to fix the moving contact 530. Of course, as other embodiments, the contact support 53 is not provided with the contact cavity 534, but it is also possible to provide a corresponding clamping structure to connect with the moving contact 530. The movable contact 530 of the embodiment includes two movable contact pieces 531 arranged side by side at intervals, the two movable contact pieces 531 are respectively provided with a movable contact, and the corresponding fixed contact 220 is provided with two fixed contacts. Of course, as other embodiments, only one movable contact piece 531 and one movable contact point may be provided for the movable contact 530, and one stationary contact point may be provided for the stationary contact point.

The contact support 53 is rotatably mounted in the housing 1, a rotation mounting structure 532 is arranged at the axial end of the contact support 53, and the rotation mounting structure 532 is a rotation protrusion or a rotation groove; the contact cavity 534 penetrates through the contact support 53 along the radial direction of the contact support 53, and two ends of the contact cavity 534 are respectively provided with a first opening 5341 and a second opening 5343; the contact support 53 is further provided with a second connection hole 533 for connecting the link 52. Preferably, a second protrusion 537 is provided to protrude on a radial side wall of the contact support 53, and the second connection hole 533 is provided to the second protrusion 537; a third protrusion 538 is further provided on a radial side wall of the contact holder 53 in a protruding manner, the third protrusion 538 being provided adjacent to the first opening 5341 on a side of the first opening 5341 near the movable contact point of the movable contact piece 531 for supporting the movable contact piece 531 and increasing an electrical gap with the stationary contact.

Preferably, the movable contact 530 includes a plurality of movable contact pieces 531 arranged side by side, the movable contact 530 of the embodiment is provided with two movable contact pieces 531, the contact support 53 rotates to drive the two movable contact pieces 531 to contact or separate from the fixed contact 220, the two movable contact pieces 531 are respectively a first movable contact piece and a second movable contact piece, the two movable contact pieces 531 are respectively provided with a movable contact, and the two movable contact pieces are mounted on the contact support 53 side by side; two fixed contacts are arranged on the corresponding fixed contact 220, and a moving contact 530 formed by two moving contact pieces 521 and the fixed contact 220 form a double contact. The first wiring terminal 21, the first movable contact, the fixed contact 220 and the second wiring terminal 22 form a first loop, the first wiring terminal 21, the second movable contact, the fixed contact 220 and the second wiring terminal 22 form a second loop, and the first loop and the second loop are connected in parallel to form a double-contact loop. The embodiment adopts a parallel connection mode of two loops, thereby increasing the contact reliability and current-carrying capacity of the contact, reducing the electric repulsive force to lead the contact to be unnecessarily repelled to cause fusion welding, and prolonging the service life of the contact. It should be noted that, the moving contact assembly and the dual-contact circuit of the present embodiment are not only applicable to the electric operating mechanism of the present embodiment, but also applicable to the existing mechanical operating mechanism, that is, the moving contact 530 is driven by the operating mechanism driven by the handle and the button, and the operating mechanism may also have corresponding lock catch and trip buckle, which all belong to the protection scope of the present invention.

Preferably, the two movable contact pieces 531 are arranged at intervals side by side, a small gap is formed between the adjacent side edges of the two movable contact pieces 531, and a positioning protrusion is arranged on the adjacent side edges of the two movable contact pieces 531 to form a gap, so that the two movable contact pieces 531 can be respectively and independently rotated and adjusted, the two movable contact pieces are respectively and fully contacted and matched with the two fixed contact pieces, and the problems of mutual interference and insufficient contact between a certain movable contact piece and the fixed contact piece caused by the fact that the two movable contact pieces and/or the two fixed contact pieces are not located on the same plane due to processing and the like are avoided. The first terminal 21 is connected to the first movable contact and the second movable contact, respectively. The fixed contact 220 is provided with two fixed contacts, and the second wiring terminal 22 is connected with the fixed contact 220. Alternatively, as another embodiment of the stationary contact 220, the stationary contact 220 includes two stationary contacts disposed side by side, both stationary contacts being provided with stationary contacts, and it is also possible that the second terminal 22 is connected to both stationary contacts, respectively.

The first opening 5341 of the contact cavity 534 has a size smaller than the inner diameter of the contact cavity 534, the first opening 5341 has a size smaller than the second opening 5343, the two movable contacts 531 are provided with movable contacts, one end provided with the movable contacts extends out of the first opening 5341, and the contact spring 535 is installed in the contact cavity 534 from the second opening 5343 and acts between the movable contact 530 and the side wall of the contact cavity 534. The movable contact 530 of the movable contact assembly of the embodiment is provided with two movable contact pieces 531, which not only can increase the contact reliability and the current-carrying capacity, but also can reduce the electric repulsive force to make the contact unnecessary to be separated to cause fusion welding, and the two movable contact pieces 531 are simply assembled and are inserted into the contact cavity 534 of the contact support 53, the contact spring 535 is installed in the contact cavity 534 through the second opening 5343, and the contact spring 535 and the first opening 5341 limit the movable contact piece 531 to form a reliable assembly.

The two movable contact pieces 531 are symmetrically arranged and arranged in the contact cavity 534 side by side, and one end provided with a movable contact extends out of the contact cavity 534; the movable contact 531 one end is provided with the connection that the sixth protruding 5302 is used for strengthening the movable contact, the movable contact can be silver alloy contact or other material contact, still can coat the graphite alkene cladding material, the movable contact supports and leans on the sixth protruding 5302 to weld in the one end side of movable contact 531, and the end that the sixth protruding 5302 is closer to movable contact 531 relative to movable contact, protects the movable contact and can strengthen the connection of movable contact, the outward one section of extension of sixth protruding 5302 is equipped with the striking end 5303, and movable contact 531 other end sets up by the fifth protruding 5301 for with the spacing cooperation of contact spring 535, restriction contact spring 535's elastic arm 5352 or 5353.

The middle part of the side edge of the two movable contact pieces 531 far away from each other is provided with a fourth bulge 5304, one end of the movable contact piece 531 provided with a fifth bulge 5301 is positioned in the contact cavity 534, one end provided with a movable contact extends out of the contact cavity 534 from the first opening 5341, the fourth bulge 5304 is positioned at the inner side of the contact cavity 534 and is abutted against the side wall of the first opening 5341 for limiting the position of the movable contact piece 531 extending out of the contact cavity 534, a cavity side wall bulge 5342 is arranged in the contact cavity 5341, the cavity side wall bulge 5342 is close to the first opening 5341, the middle part of the movable contact piece 531 is abutted against the cavity side wall bulge 5342 under the action of the contact spring 535, so that the two movable contact pieces 531 can respectively rotate based on the cavity side wall bulge 5342 as a fulcrum to realize over travel, and the fourth bulge 5304 is abutted against the side wall of the first opening 5341 of the contact cavity 534, and one end of the contact spring 535 is limited by the fifth bulge 5301 of the movable contact piece 531 and is relatively fixed on the contact support 53.

The contact spring 535 of this embodiment is formed by integrally connecting two rotating bodies, each of which is provided with two elastic arms, one of the two rotating bodies is bent and connected to form a connecting portion 5351, the other of the two rotating bodies is disposed at a distance relative to each other to form two elastic arms 5352, 5353, the size of the first opening 5341 of the contact cavity 534 is smaller than the inner diameter size of the contact cavity 534, the size of the first opening 5341 is smaller than the size of the second opening 5343, and the contact spring 535 is loaded into the contact cavity 534 from the second opening 5343. The connection portion 5351 of the contact spring 535 acts on the contact support 53, and the two elastic arms 5352, 5353 act on the two movable contact pieces 531, respectively, and are in a limit fit with the fifth protrusion 5301. The contact spring 535 of the present embodiment is integrally formed with two rotating bodies, so that the assembly is facilitated, and two independent springs may be used to assemble the movable contact 531, respectively, as required. In addition, the contact spring 535 may be a compression spring, a leaf spring, or other spring structure.

As shown in fig. 3-5, a preferred embodiment of the first terminal 21 and the second terminal 22. The first terminal 21 is integrally formed, a first end of the first terminal 21 is connected with the connecting terminal 23 or extends out of the housing 1 to serve as a wire inlet end, a second end of the first terminal is connected with the moving contact 530 through a flexible wire, and the first terminal 21 is further provided with a first striking plate 213, and the first striking plate 213 extends from a breaking position close to the moving contact 530 to the direction of the arc extinguishing chamber 60 of the arc extinguishing mechanism 6. The second terminal 22 is integrally formed, the first end of the second terminal 22 is connected with the connecting terminal 23 or extends out of the housing 1 to serve as a wire outlet, the second end of the second terminal 22 is provided with a fixed contact serving as a fixed contact 220, namely, the fixed contact 220 and the second terminal 22 are integrally formed, the second terminal 22 is further provided with a second arc striking piece 223, the second arc striking piece 223 extends from the fixed contact 220 to the direction of the arc extinguishing chamber 60 of the arc extinguishing mechanism 6, the first terminal 21 and the second terminal 22 connected with the moving contact 530 and the fixed contact 220 are directly used as wire inlet and outlet ends, the second terminal 22 and the fixed contact 220 are integrally formed, and the whole circuit is simple and convenient to assemble.

The first striking piece 213 and the second striking piece 223 are respectively and closely arranged at two sides of the arc extinguishing chamber 60 in the second direction, and respectively introduce the electric arcs generated when the moving and static contacts are disconnected into the arc extinguishing chamber 60, so as to realize quick arc extinguishing. The plane where the first striking plate 213 and the second striking plate 223 are located is basically parallel to the plane where the arc extinguishing grid plate of the arc extinguishing chamber 60 is located, the second striking plate 223, the arc extinguishing chamber 60 and the first striking plate 213 are basically arranged in sequence along the length direction of the housing 1, and the plane where the swinging direction of the moving contact 530 is located is parallel to the length direction of the housing 1.

Between the first end and the second end of the first terminal 21 is a first connection piece 214, and between the first end and the second end of the second terminal 22 is a second connection piece 224, where the first connection piece 214 and the second connection piece 224 are arranged in parallel at intervals. Preferably, the first connecting piece 214 passes through a current transformer as the current sampling device 7. As a further embodiment, the first terminal 21 may be provided with an integrally formed shunt as the current sampling means 7.

Specifically, the first terminal 21 includes a first outer tab 211, a first connecting tab 214, a first inner tab 212 and a first striking tab 213, which are sequentially connected, and are used as a first end, the first inner tab 212 is bent and connected with one end of the first connecting tab 214, the first inner tab 212 is electrically connected with the moving contact 530, the first inner tab 212 is electrically connected with two moving contact tabs 531 through two flexible wires, the first outer tab 211 is bent and connected with the other end of the first connecting tab 214, the first outer tab 211 is connected with the connecting terminal 23 or extends out of the housing 1 for connecting, the first striking tab 213 is connected with one side edge of the first inner tab 212, the first striking tab 213, the first inner tab 212 and the first outer tab 211 are parallel, and are perpendicular to the plane of the first connecting tab 214, and the current sampling device 7 is coupled with the first connecting tab 214. The second terminal 22 includes a second outer tab 221 as a first end, a second connecting tab 224, a second inner tab 222 as a second end, and a second striking tab 223, where the second inner tab 222 is connected with one end of the second connecting tab 224 in a bending manner, the second outer tab 221 is connected with the other end of the second connecting tab 224 in a bending manner, the second outer tab 221 is connected with the connecting terminal 23 or extends out of the housing 1 to be used for wiring, the second striking tab 223 is connected with one side edge of the second inner tab 222, the planes of the second striking tab 223, the second inner tab 222 and the second outer tab 221 are parallel, and are perpendicular to the plane of the second connecting tab 224, the second inner tab 222 is electrically connected with the fixed contact 220, and preferably, two fixed contacts are disposed on the second inner tab 222 as the fixed contact 220. Preferably, the first outer tab 211 and the second outer tab 221 are disposed in parallel and spaced apart side by side in the second direction.

The arc-extinguishing chamber 60 comprises an arc-extinguishing chamber and a plurality of arc-extinguishing gate sheets arranged in the arc-extinguishing chamber, wherein the plurality of arc-extinguishing gate sheets are stacked at intervals, an arc-extinguishing notch is arranged at one end close to the moving contact 530, one end of the arc-extinguishing chamber 60 close to the moving contact is an air inlet end, the other end of the arc-extinguishing chamber is an air outlet end, and the stacking direction of the plurality of arc-extinguishing gate sheets is the height direction of the arc-extinguishing chamber 60. The first striking plate 213 and the second striking plate 223 are respectively disposed at two sides of the height of the arc extinguishing chamber 60 in the second direction. Preferably, the first outer tab 211, the first striking tab 213, the arc extinguishing chamber 60, the second striking tab 223 and the second outer tab 221 are sequentially arranged at intervals side by side in the second direction, and the length extension directions are consistent and all extend along the first direction. The first striking plate 213 and the first inner plate 212 are integrally arranged opposite to the first outer plate 211, and the first connecting plate 214 is connected between the first inner plate 212 and the first outer plate 211 to enable the first terminal 21 to be in an approximate U-shaped structure; the second striking piece 223 and the second inner tab 222 are integrally opposite to the second outer tab 221, the second connecting piece 224 is connected between the second inner tab 222 and the second outer tab 221 to enable the second terminal 22 to be in a similar U-shaped structure, the first terminal 21 is integrally provided with the first striking piece 213, the second terminal 22 is integrally provided with the fixed contact 220 and the second striking piece 223, and the structure is simple and convenient to assemble. The first wiring terminal 21 and the second wiring terminal 22 are arranged on two sides of the arc extinguishing chamber at intervals side by side, so that the whole loop from the inlet end to the outlet end of the switch is positioned at one end of the switch, and the loop structure is compact.

Preferably, as shown in fig. 3-4, the electric operating mechanism 3 and the moving contact assembly of the embodiment are installed on the electric operating shell 8, and are installed in the shell 1 after forming a driving module, so that the reliability is high, the assembly efficiency is high, and the automatic assembly is convenient. Specifically, the driving module comprises an electric operation shell 8, an electric operation mechanism 3 and a moving contact assembly, wherein the electric operation mechanism 3 comprises a motor 31, a gear set 30 and a transmission mechanism 5, the motor 31 drives the transmission mechanism 5 through the gear set 30, the transmission mechanism 5 is connected with the moving contact assembly, and the moving contact assembly comprises a contact support 53 and a moving contact 530 arranged on the contact support 53; the gear set 30 and the transmission mechanism 5 are arranged in the electric operation shell 8, the motor 31 and the contact support 53 are arranged on the electric operation shell 8, the contact support 53 is arranged in the electric operation shell 8 or partially extends out of the electric operation shell 8, one end of the moving contact 530 provided with a moving contact point extends out of the electric operation shell 8, and the motor 31 is arranged in the electric operation shell 8 or partially extends out of the electric operation shell 8 or is fixedly arranged outside the electric operation shell 8. Preferably, the electric operating mechanism 3 further comprises a control circuit 4, the control circuit 4 comprises a circuit board 40 and a micro switch, and the control circuit 4 is also arranged in the electric operating shell 8. In this embodiment, the motor 31 is disposed at one end of the electric operation housing 8, one end of the electric operation housing 8 is provided with a motor fixing structure for fixing the motor 31, the contact support 53 is rotatably disposed at the other end of the electric operation housing 8, and the lever 51 is located between the motor 1 and the contact support 53. Referring to fig. 6-7, in the second embodiment of the electric actuator 3, the lever 51 is disposed at one end of the electric actuator housing 8, the contact support 53 is rotatably disposed at the other end of the electric actuator housing 8, and the motor 1 is disposed between the lever 51 and the contact support 53.

Preferably, the electric operation housing 8 of the present embodiment includes an electric operation first housing 82 and an electric operation second housing 83, the electric operation first housing 82 and the electric operation second housing 83 are buckled relatively to form a module accommodating cavity, a partition 81 is provided in the electric operation housing 8 to partition the module accommodating cavity into an electric operation first space and an electric operation second space, an electric operation first space is formed between the partition 81 and the electric operation first housing 82, an electric operation second space is formed between the partition 81 and the electric operation second housing 83, a gear set 30 is provided in the electric operation first space, a transmission mechanism 5, a moving contact assembly and a control circuit 4 are provided in the electric operation second space, a communication hole is provided between the electric operation first space and the electric operation second space, and the output gear 33 of the gear set 30 is arranged in the electric operation first space through the communication hole to drive the lever 51, or is arranged in the electric operation second space through the communication hole to be in driving fit with the transmission gear 32. Specifically, the plurality of transmission gears 32 and the output gear 33 are installed in an electrically operated first space on one side of the partition 81, and the lever 51, the link 52, the contact support 53 and the moving contact 530 are installed in an electrically operated second space on the other side of the partition 81. Corresponding positions of the partition board 81, the electric operation first shell 82 and the electric operation second shell 83 are provided with assembly structures, and the assembly structures are assembly holes fixed by buckles or rivets or screws.

Embodiment II as shown in FIGS. 13-14

The present embodiment differs from the first embodiment in that the connection terminal 23 is not provided inside the switch, and one end of the first connection terminal 21 and the second connection terminal 22 for connection extends outside the switch for connection. Preferably, the parts of the first wiring terminal 21 and the second wiring terminal 22 extending out of the casing 1 are wiring board structures and are connected with an external busbar clamp in a plugging manner, in addition, a user can set corresponding wiring terminals 23 at the parts of the first wiring terminal 21 and the second wiring terminal 22 extending out of the switch according to the needs so as to match different wiring modes or can directly wire without setting the wiring terminals 23.

It should be noted that, in the description of the present invention, the terms "upper", "lower", "left", "right", "inner", "outer", and the like indicate an orientation or a positional relationship based on that shown in the drawings or an orientation or a positional relationship conventionally put in use, and are merely for convenience of description, and do not indicate that the apparatus or element to be referred to must have a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used merely to distinguish between descriptions and should not be construed as indicating relative importance.

The foregoing is a further detailed description of the invention in connection with the preferred embodiments, and it is not intended that the invention be limited to the specific embodiments described. It will be apparent to those skilled in the art that several simple deductions or substitutions may be made without departing from the spirit of the invention, and these should be considered to be within the scope of the invention.

Claims (10)

1. A moving contact assembly comprising a contact support (53), a moving contact (530) and a contact spring (535), characterized in that: the contact support (53) is provided with a contact cavity (534) penetrating through the contact support (53), two ends of the contact cavity (534) are respectively provided with a first opening (5341) and a second opening (5343), the moving contact (530) comprises two moving contact pieces (531) which are arranged side by side, the size of the first opening (5341) of the contact cavity (534) is smaller than the inner diameter size of the contact cavity (534), the size of the first opening (5341) is smaller than the size of the second opening (5343), the two moving contact pieces (531) are respectively provided with a moving contact, one end provided with the moving contact extends out of the first opening (5341), and a contact spring (535) is arranged in the contact cavity (534) from the second opening (5343) and acts between the moving contact (530) and the side wall of the contact cavity (534).

2. The moving contact assembly of claim 1, wherein: the contact cavity (5341) is internally provided with a cavity side wall bulge (5342), the cavity side wall bulge (5342) is close to the first opening (5341), and the middle part of the movable contact piece (531) is abutted against the cavity side wall bulge (5342) under the action of the contact spring (535) so that the movable contact piece (531) can rotate based on the cavity side wall bulge (5342) as a fulcrum.

3. The moving contact assembly of claim 1, wherein: the two movable contact pieces (531) are arranged at intervals side by side, a fourth protrusion (5304) is arranged on the side edge, away from each other, of the two movable contact pieces (531), the fourth protrusion (5304) is located on the inner side of the contact cavity (534) and is abutted with the side wall of the first opening (5341) and used for limiting the position, extending out of the contact cavity (534), of the movable contact pieces (531).

4. The moving contact assembly of claim 1, wherein: one end of the movable contact piece (531) is provided with a sixth bulge (5302), the movable contact is welded on one end side surface of the movable contact piece (531) against the sixth bulge (5302), the sixth bulge (5302) is closer to the end part of the movable contact piece (531) relative to the movable contact, and the sixth bulge (5302) is outwards extended to be provided with an arc striking end (5303).

5. The movable contact assembly of claim 4, wherein: the other end of the movable contact piece (531) is provided with a fifth bulge (5301) for limiting cooperation with the contact spring (535).

6. The moving contact assembly of claim 1, wherein: the contact spring (535) is formed by integrally connecting two rotating bodies, each rotating body is provided with two elastic arms, one elastic arm of each rotating body is bent and connected with the other elastic arm to form a connecting part (5351), and the other elastic arms of each rotating body are oppositely arranged at intervals to form two elastic arms (5352, 5353); the connection portion (5351) of the contact spring (535) acts on the contact support (53), and the two elastic arms (5352, 5353) act on the two movable contacts (531) respectively.

7. The moving contact assembly of claim 1, wherein: the axial end of the contact support (53) is provided with a rotary mounting structure (532), the contact cavity (534) penetrates through the contact support (53) along the radial direction of the contact support (53), and the contact support (53) is further provided with a second connecting hole (533) for connecting the connecting rod (52).

8. The movable contact assembly of claim 7, wherein: a second protrusion (537) and a third protrusion (538) are arranged on the contact support (53) in the radial direction, the second connection hole (533) is arranged on the second protrusion (537), and the third protrusion (538) is arranged adjacent to the first opening (5341) and is positioned on one side of the first opening (5341) which is close to the movable contact (531) and is provided with a movable contact.

9. A driving structure of a switch, characterized in that: the movable contact assembly comprises an electric operating mechanism and any one of claims 1-8, wherein the electric operating mechanism comprises a motor (31), a gear set (30) and a transmission mechanism (5), the motor (31) drives the transmission mechanism (5) through the gear set (30), and the transmission mechanism (5) is connected with the movable contact assembly.

10. The switch actuation structure of claim 9, wherein: still include electric operation casing (8), gear train (30) and drive mechanism (5) are installed in electric operation casing (8), and motor (31) and contact support (53) are installed on electric operation casing (8), and the one end that movable contact (530) of movable contact subassembly was equipped with the movable contact stretches out electric operation casing (8).