CN218769177U - Switch with a switch body - Google Patents

Abstract

A switch comprises a moving contact, a fixed contact, a first wiring terminal and a second wiring terminal, wherein one end of the first wiring terminal and one end of the second wiring terminal are respectively connected with the moving contact and the fixed contact, the other end of the first wiring terminal and the other end of the second wiring terminal are used as an incoming and outgoing line end of the switch, the moving contact comprises two moving contact pieces, and the two moving contact pieces are respectively provided with a moving contact and are arranged on a contact support side by side; the static contact is provided with two static contacts, the second wiring terminal and the static contact are integrally formed, contact reliability and current-carrying capacity of the contacts can be increased, electric repulsion force can be reduced, unnecessary contact repulsion is caused, fusion welding is caused, the first wiring terminal and the second wiring terminal which are connected with the moving contact and the static contact are directly used as wire inlet and outlet terminals, the second wiring terminal and the static contact are integrally formed, the whole circuit is simple, and assembly is convenient.

Description

Switch with a switch body

Technical Field

The utility model relates to a low-voltage apparatus field, concretely relates to switch.

Background

The existing switch is mainly switched on and off through manual operation, and the automation degree is not high. And mainly connect through the screw mode of connection, have artifical wiring problem and lead to the great risk that binding post burns out. With the continuous increase of the electrical load, the current carrying capacity of the contact of the existing switch is small, and the phenomena of serious contact abrasion or fusion welding often occur.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome prior art's defect, provide a switch.

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

a switch comprises a moving contact, a fixed contact, a first wiring terminal and a second wiring terminal, wherein one end of the first wiring terminal and one end of the second wiring terminal are respectively connected with the moving contact and the fixed contact, the other end of the first wiring terminal and the other end of the second wiring terminal are used as an incoming and outgoing line end of the switch, the moving contact comprises two moving contact pieces, and the two moving contact pieces are respectively provided with a moving contact and are arranged on a contact support side by side; two fixed contacts are arranged on the fixed contact, and the second wiring end and the fixed contact are integrally formed; the second wiring end is provided with an integrally formed second arc striking sheet; and/or the first terminal is provided with a first arc striking piece which is integrally formed.

Preferably, the first terminal is also integrally provided with a shunt.

Preferably, the contact support is radially 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, a cavity side wall bulge is arranged in the contact cavity and 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 two movable contact pieces can respectively rotate based on the cavity side wall bulge as a fulcrum.

Preferably, one end of the movable contact piece is provided with a sixth bulge, the movable contact is abutted against the sixth bulge and welded on one end side face of the movable contact piece, the sixth bulge is closer to the end part of the movable contact piece relative to the movable contact, the sixth bulge extends outwards to be provided with an arc striking end, and the other end of the movable contact piece is provided with a fifth bulge used for being in limit fit with the contact spring.

Preferably, the first terminal comprises a first outer connecting piece, a first inner connecting piece and a first arc striking piece which are connected in sequence; the first inner contact piece is electrically connected with the two movable contact pieces, the first outer contact piece extends out of the shell and is connected with the wiring terminal, the first arc striking piece is connected with one side edge of the first inner contact piece, and the plane where the first arc striking piece, the first inner contact piece and the first outer contact piece are located is parallel.

Preferably, the second terminal comprises a second outer connecting piece, a second inner connecting piece and a second arc striking piece which are sequentially connected, the second outer connecting piece extends out of the shell and is connected with the connecting terminal, the second arc striking piece is connected with one side edge of the second inner connecting piece, the planes of the second arc striking piece, the second inner connecting piece and the second outer connecting piece are parallel, and two static contacts are arranged on the second inner connecting piece and serve as static contacts.

Preferably, the first outer connecting piece, the first arc striking piece, the arc extinguishing chamber, the second arc striking piece and the second outer connecting piece are arranged side by side at intervals.

Preferably, the first arc striking plate and the first inner connecting plate are integrally arranged opposite to the first outer connecting plate, and the first connecting plate is connected between the first inner connecting plate and the first outer connecting plate; the second arc striking piece and the second inner connecting piece are integrally arranged opposite to the second outer connecting piece, and the second connecting piece is connected between the second inner connecting piece and the second outer connecting piece.

Preferably, the first connecting piece passes through a current transformer as the current sampling device.

Preferably, the device comprises an electric operating mechanism, 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 contact support.

The utility model discloses a switch, two group contacts are constituteed to moving contact and static contact that two moving contact pieces constitute, not only the reliability and the current-carrying capacity of multiplicable contact, can reduce electronic repulsion simultaneously and make contact unnecessary repel and open and cause the fusion welding, the first wiring end and the second wiring end of being connected with moving contact and static contact are direct as advancing the leading-out terminal moreover, second wiring end and static contact integrated into one piece, whole circuit is simple, high convenience assembling, first wiring end and second wiring end still respectively an organic whole are equipped with first arc piece and second arc piece, further simplify the structure.

In addition, first outer splicing, first run-on piece, explosion chamber, second run-on piece and the outer splicing of second set up at the interval side by side in the second direction, and first wiring end and second wiring end set up in the explosion chamber both sides at the interval side by side for the circuit that the inlet wire end of switch reaches the outlet terminal wholly is located the one end of switch, and return circuit compact structure.

Drawings

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

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

fig. 3 is a schematic diagram of an internal structure of a first embodiment of the switch of the present invention, showing a structure of a side surface of the first embodiment of the electric operating mechanism;

fig. 4 is a schematic view of another internal structure of the first embodiment of the switch of the present invention, showing the structure of another side of the first embodiment of the electric operating mechanism;

fig. 5 is a schematic structural view of an embodiment of an electric operating mechanism of the switch of the present invention, in which one side of the electric operating housing is removed;

fig. 6 is a schematic side view of a second embodiment of an electric operating mechanism in a housing of the switch of the present invention;

fig. 7 is another schematic side view of the second embodiment of the electrical operating mechanism in the switch of the present invention;

fig. 8 is a side schematic view of the output gear and lever of the switch electric operating mechanism of the present invention;

fig. 9 is another side schematic view of the output gear and lever of the switch electric operating mechanism of the present invention;

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

fig. 11 is a schematic structural view of the moving contact assembly of the switch of the present invention;

fig. 12 is a schematic structural diagram of the moving contact and the 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 embodiment of the switch of the present invention;

fig. 14 is a schematic diagram of the internal structure of a second embodiment of the switch of the present invention;

Detailed Description

The following embodiments are provided in connection with the accompanying drawings to further illustrate the switch of the present invention. The switch of the present invention is not limited to the description of the following embodiments.

As shown in fig. 1-5, the utility model discloses an embodiment of an intelligent switch, including the shell 1 and setting up the electrical operation mechanism 3 and at least one phase circuit in the shell 1, each phase circuit all includes moving contact subassembly, static contact 220, first wiring end 21 and second wiring end 22, the moving contact subassembly includes contact support 53 and moving contact 530, first wiring end 21 and second wiring end 22 are connected with moving contact 530 and static contact 220 respectively, electrical operation mechanism 3 is connected with the contact support 53 of at least one phase circuit, drive moving contact 530 and static contact 220 contact and separation, realize the closure and the disconnected control of switch, the one end of first wiring end 21 and second wiring end 22 is connected with moving contact 530 and static contact 220 respectively, the other end is used for the wiring; the electric operator 3 is provided with a corresponding control terminal 310 for receiving a control signal. One of the first terminal 21 and the second terminal 22 serves as a wire inlet terminal, and the other serves as a wire outlet terminal.

The switch of the embodiment is a novel intelligent switch, adopts the electric operating mechanism 3 to drive the moving contact 530, does not adopt the traditional operating mechanism with a lock catch and a jump catch, namely, does not set a button or a handle mechanically driven with the operating mechanism, but carries out closing and breaking control through an analog signal key 50 or an external control signal, and has simple structure, small volume and high reliability.

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

As shown in fig. 1-5, the first terminal 21 and the second terminal 22 are both disposed at one end of the switch. The terminals 21 and 22 may be disposed inside the switch and connected to a terminal 23 (see fig. 3), and an external copper bar is connected to the terminal 23 in a plug-in manner. Alternatively, the first terminal 21 and the second terminal 22 may also extend out of the switch, and the portion extending out of the housing 1 is a terminal board structure and is connected to an external bus bar in a plugging manner. In addition, the user can arrange corresponding connection terminals 23 on the parts of the first terminal 21 and the second terminal 22 extending out of the switch according to the requirement so as to match different connection modes or directly connect without arranging the connection terminals 23.

The utility model discloses an intelligence switch replaces original ordinary switch, not only improves load-carrying current ability and reliability greatly, has promoted intelligent control moreover. The switch adopts the electric operating mechanism 3 to drive the moving contact 530, the on-off control of the intelligent switch can be realized by controlling the electric operating mechanism 3 through the control terminal 310, the connection of a main loop is carried out through the first terminal 21 and the second terminal 22, and the intelligent switch has the advantages of simple structure, small size and high reliability.

As shown in the first embodiment shown in fig. 1-5, the switch of this embodiment is a single-phase switch, and only one phase circuit includes a set 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 component 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 component 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 be in contact with and separated from a fixed contact 220, the moving contact 530 is arranged opposite to the fixed contact 220, one end of a first terminal 21 and one end of a second terminal 22 are respectively connected with the moving contact 530 and the fixed contact 220, and the other end of the first terminal 21 and the other end of the second terminal 22 are used for wiring. The first terminal 21 is connected with the movable contact 530, and the second terminal 22 is connected with the fixed contact 220; alternatively, the first terminal 21 may be connected to the stationary contact 220, and the second terminal 22 may be connected to the movable contact 530. In the embodiment, the first terminal 21 is used as a wire inlet end, and the second terminal 22 is used as a wire outlet end, which can be interchanged as required.

Preferably, as shown in fig. 3-5, the switch is further provided with a current collecting device 7 for collecting a current signal of the switch. Preferably, the current collection device 7 is arranged at the incoming line end, and the current collection device 7 is coupled with the first terminal 21. Further, preferably, the current collecting device 7 of the present embodiment is a current transformer, and the first terminal 21 passes through the current transformer. Of course, as other embodiments, the current collecting device 7 may also be a current divider, preferably a manganese-copper alloy current divider, and the first terminal 21 is integrally formed with the current divider.

As shown in fig. 5 and 7, in the intelligent switch of this embodiment, the moving contact 530 is driven by the electrical operation mechanism 3, the conventional operating mechanism with a latch and a trip is not provided, and the external operating handle or button is not provided, so that the electrical operation mechanism 3 can be controlled by the control terminal 310 to realize on-off control of the intelligent switch.

Preferably, as shown in fig. 3 to 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 disposed corresponding to the moving contact 530 and the stationary contact 220, and is configured to extinguish an arc generated when the moving contact 220 and the stationary contact 220 are separated, so as to improve a circuit bearing capacity of the switch. 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 fit with the transmission mechanism 5. The transmission gear 32 of the present embodiment includes a first transmission gear sleeved on the output shaft of the motor 31, and the first transmission gear directly drives the output gear 33, and as another embodiment, may further include a plurality of second transmission gears for transmitting between the first transmission gear and the output gear 33. Preferably, all gears of the gear set, including the output gear 33 and the transmission gear 32, are spur 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, other embodiments may be bevel gears or bevel gears. The number of the transmission gears 32 can be adjusted according to requirements.

As shown in fig. 3-7, the transmission mechanism 5 includes a lever 51 and a connecting rod 52, the movable contact assembly includes a contact support 53 and a movable 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 movable 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 movable contact 530 to swing, so as to implement the closing and opening actions of the switch, and the structure is simple without a complex tripping structure.

Preferably, the transmission mechanism 5 is composed of a lever 51 and a link 52, and only has the lever 51 and the link 52, the lever 51 is connected with the output gear 33, and the link 52 is connected between the lever 51 and the contact support 53, so that the structure is very simple, no complicated structure is provided, the transmission is reliable, and the volume is small. Of course, as an embodiment of the deterioration, other transmission connecting rods can be added; alternatively, the contact support 53 may be directly actuated by the lever 51, for example, by an extension of the lever 51 having an integral actuating arm that engages in an actuating slot in the plug support 53.

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

As shown in fig. 2, the housing 1 of the switch of the present embodiment includes a first housing 11 and a second housing 12, the first housing 11 and the second housing 12 are relatively buckled to form the housing 1 of the switch, and the two are buckled 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 the control circuit of the electric operating mechanism 3 is far away from a wiring terminal of a main circuit of the switch to separate weak current and strong current.

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 assembled into an integral driving module with the electric operating mechanism 3 and then installed in the shell 1, so that the assembling efficiency is high, and the insulativity is improved. In a preferred embodiment, the contact holder 53 is also mounted on the electrical operating housing 8, the contact holder 53 is at least partially mounted in the electrical operating housing 8, and the end of the movable contact 530 having the movable contact extends out of the electrical operating housing 8 to be engaged with the stationary contact 220.

Referring to fig. 3-5, in the first embodiment of the electric operating mechanism 3, the motor 31 is disposed at one end of the housing, the first terminal 21 and the second terminal 22, which are respectively a wire inlet end and a wire outlet end, are disposed at the other end of the housing 1, the first direction is from the end of the housing 1 where the motor 31 is disposed to the end where the wire inlet end and the wire outlet end are disposed, and the height direction of the housing 1 is also from the end where the motor 1 is disposed, in the height direction, the motor 1 is disposed above the lever 51 and the output gear 33 (not shown in the figures by being hidden), the lever 51 is disposed 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, which are used for wiring, both extend from the end away from the motor 31 in the first direction of the housing 1. In the embodiment, the first terminal 21 and the second terminal 22 are both arranged at the other end of the shell, which is not only beneficial to wiring but also beneficial to simplifying the structural layout, and simultaneously, strong electricity is far away from weak electricity. Of course, as another embodiment 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 operating mechanism 3 is different from the first embodiment in the mounting 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 is coaxially arranged with the output gear 33, 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 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, the motor 31 is connected to the control circuit 4, and the control circuit 4 receives a control signal and controls the motor 31 to rotate forward, backward and/or stop rotating, so as to drive the gear set 30 and the transmission mechanism 5. Preferably, the control circuit comprises at least one microswitch for monitoring the position of the gear set 30 and/or the transmission 5 to achieve 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 for easy assembly, and the control terminal 310 may also be disposed on the circuit board 40 and extend out of the housing 1 for easy connection. Referring to fig. 2, a communication interface hole is provided on the housing 1 for the control terminal 310 of the electric operating mechanism 3 to protrude. Preferably, as another embodiment, the control terminal 310 may be connected to the circuit board 40 by a wire, which extends out of the housing 1 and is connected to a controller of the electric distribution box. Preferably, the control terminal 310 and an external controller may be plug-connected through a plug terminal.

As shown in fig. 3 to 5, the electric operating mechanism 3, the moving contact assembly, the fixed contact 220, and the first terminal 21 and the second terminal 22 as the wire inlet and outlet terminals are sequentially arranged along a first direction, i.e., a height direction of the housing 1, and the arc extinguishing mechanism 6 is disposed between the first terminal 21 and the second terminal 22 along a second direction, i.e., a length direction of the housing 1. The switch of the embodiment adopts the electric operating mechanism 3 to drive the moving contact 530, can control the electric operating mechanism 3 through a control signal to realize the closing and breaking control of a switch main circuit, and sets the arc extinguishing mechanism to improve the circuit bearing capacity, and sets the electric operating mechanism 3 and the first wiring terminal 21 and the second wiring terminal 22 which are used as the wiring terminals of the switch main circuit at the two ends of the shell 1 respectively, thereby not only facilitating wiring but also simplifying the structural layout, and keeping strong current away from weak 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 the third direction, i.e., the width (i.e., thickness) direction of the housing 1, and are located between the arc extinguishing mechanism 6 and the motor 31 in the first direction, the arc extinguishing mechanism 6 is disposed between the movable 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 located between the first terminal 21 and the second terminal 22 in the second direction, the movable contact component is connected with the transmission mechanism 5, the movable contact component is located between the transmission mechanism 5 and the corresponding arc extinguishing mechanism 6 in the first direction, one end of the fixed contact 220, which is provided with the fixed contact, is arranged corresponding to one end of the corresponding movable contact 530, which is provided with the movable contact, the arc extinguishing mechanism 6 comprises an arc extinguishing chamber 60, the arc extinguishing chamber 60 is superposed on the corresponding fixed contact 220 along the two directions, namely the length direction of the shell 1, and the first direction, the second direction and the third direction are perpendicular to each other. The gear set 30, the transmission mechanism 5 and the control circuit 4 of the present embodiment are sequentially stacked along the third direction, so that the structure is compact, the size of the switch is reduced, the transmission mechanism 5 is located between the gear set 30 and the control circuit 4, and the relationship between the three can be adjusted according to the requirement, for example, the gear set 30 is located in the middle. The axial direction of the output shaft of the motor 1 is arranged along a third direction.

Preferably, as shown in fig. 3 to 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 operating housing 8 of the present embodiment includes a partition 81, an electric operating first housing 82 and an electric operating second housing 83, the electric operating first housing 82 and the electric operating second housing 83 are respectively located at both sides of the partition 81, the partition 81 and the electric operating first housing 82 are oppositely disposed to form an electric operating first space for assembling the gear set 30, and the partition 81 and the electric operating second housing 83 are oppositely disposed to form an electric operating 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 electrically operated second space, one end of the moving contact 530 having a moving contact extends out of the electrically operated housing 8, the partition 81, the electrically operated first housing 82 and the electrically operated second housing 83 are fixedly connected and then assembled into the outer shell 1, and a moving contact avoiding hole through which the moving contact 530 penetrates is formed in the electrically operated housing 8.

As another embodiment, the components may be directly mounted in the housing 1 without providing the electrically operated first housing 82, the electrically operated second housing 83, and the partition 81, and may be positioned and mounted by a structure on the side wall of the housing 1. Or only set up baffle 81, baffle 81 can dismantle with shell 1 and be connected be equipped with motor fixed knot on the baffle 81 constructs, can install motor 31 and baffle 81 after the assembly in shell 1 again, fixes motor 31 through baffle 81 and the cooperation of shell 1, and 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, and the first housing 11 and the second housing 12 are buckled with each other to form the housing 1 of the switch. Preferably, the engaging direction of the first housing 11 and the second housing 12 is the first direction, but may be the second or third direction. When the first shell 11 and/or the second shell 12 are/is provided with the pressing convex ribs for pressing the partition 81 or the electric operation shell 8 during buckling, and/or the first shell 11 and/or the second shell 12 are/is provided with the buckling structures matched with the partition 81 or the electric operation shell 8 in a clamping manner and fixedly connected with screws, so that the shell 1 and the partition 81 or the electric operation shell 8 can be detachably mounted.

Preferably, as shown in fig. 8-9, the output gear 33 of the present embodiment is in transmission fit with the lever 51, and the output gear 33 of the present embodiment is in transmission fit with the lever 51 coaxially. 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 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 state 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 convexly arranged on the end face of the output gear 33 close to one end of the lever 51, and the radial side wall of the output gear 33 is provided with a first tooth 331 for being meshed with the transmission gear 32. The output gear 33 and the lever 51 are coaxially assembled, the driving boss 330 and the limiting boss 511 are arranged in a staggered mode, the transmission gear 32 drives the output gear 33 to rotate through the first tooth 331, when the output gear 33 rotates to enable the driving boss 330 and the limiting boss 511 to limit, the lever 51 is driven to rotate, and the driving lever 51 rotates between a lever closing position and a lever breaking position. The lever 51 of this embodiment is provided with two limiting protrusions 511 at two sides of the rotation axis of the lever 51, the driving protrusion 330 drives the lever 51 to rotate towards the lever closing position through one limiting protrusion 511, and drives the lever 51 to rotate towards the lever breaking position through the other limiting protrusion 511, and the directions of the rotation of the lever 51 towards the lever closing position and the rotation of the lever 51 towards the lever breaking position are opposite. Two driving protrusions 330 are also provided on the output gear 33, but it is also possible to provide one driving protrusion 330 and one restricting protrusion 511.

The link 52 is a U-shaped rod, one end of which is inserted into the first connection hole 512 of the lever 51, and the other end of which is inserted into the second connection hole 533 of the contact support 53, so as to link the two.

It should be noted that, 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 output gear 33 and the lever 51 are spaced apart from each other in parallel with the axis, the output gear 33 is radially provided with a first gear, the lever 51 is radially provided with a lever gear, and the first gear and the lever gear are in mesh transmission. In addition, as another embodiment, the output gear 33 and the lever 51 may be driven by gear engagement, and the first gear of the output gear 33 and/or the lever gear of the lever 51 may be a sector gear, and when the driving lever 51 is rotated to the lever closing position or the lever breaking position, it is also possible that the output gear 33 and the lever 51 are disengaged from each other, so that the control circuit may drive the motor to rotate for a preset time period according to the control signal without providing the microswitch K to perform the closing and breaking control.

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 microswitch K, and when the output gear 33 or the lever 51 or the contact support 53 rotates to a position for driving the switch to close and/or driving the switch to open, the switching state of the microswitch K is triggered to monitor the position state of the gear set 30 and/or the transmission mechanism 5 and/or the contact support 53, or the closing state or the opening state of the switch. In this embodiment, when the switch is in a closed state, that is, the lever 51 rotates to the lever-closed position, the first protrusion 510 on the lever 51 acts on the microswitch K; when the circuit breaker is in the breaking state, the first protrusion 510 on the lever 51 avoids the microswitch K. As an alternative embodiment, the microswitch K can also be acted on by the output gear 33 or the contact support 53. As another embodiment, two microswitches may be provided, in which the gear set 30 and/or the transmission 5 and/or the contact support 53 act on one of the microswitches to clear the other microswitch when the switch is in the closed state, and in which the gear set 30 and/or the transmission 5 and/or the contact support 53 clear the one microswitch to act on the other microswitch when the switch is in the open state.

The switch of the embodiment does not adopt a traditional operating mechanism with a lock catch and a jump catch, and is not provided with a button or a handle, the transmission mechanism 5 is controlled only by a control circuit, the control circuit has no intervention of manual closing and breaking operation, so that the control circuit has a simple structure, external equipment such as a distribution box and the like controls the positive rotation and the negative rotation of a motor by changing the polarity direction of an input power supply, the control circuit is automatically cut off after the switch is closed or broken, the switch is controlled to be closed and broken only by a microswitch K, and the switch is beneficial to reducing the switch volume and simplifying the trigger structure of the microswitch K.

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

The contact support 53 is rotatably installed in the housing 1, a rotary installation structure 532 is arranged at the axial end of the contact support 53, and the rotary installation structure 532 is a rotary protrusion or a rotary 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 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 protrudingly provided on a radial sidewall of the contact support 53, and the second connection hole 533 is provided on the second protrusion 537; a third protrusion 538 is further protrudingly provided on a radial sidewall of the contact holder 53, the third protrusion 538 being provided adjacent to the first opening 5341, on a side of the first opening 5341 adjacent to the movable contact 531 provided with the movable contact, for supporting the movable contact 531 and increasing an electrical gap with the fixed contact.

Preferably, the moving contact 530 includes a plurality of moving contacts 531 arranged side by side, the moving contact 530 of this embodiment is provided with two moving contacts 531, the two moving contacts 531 are a first moving contact and a second moving contact respectively, each of the two moving contacts 531 is provided with a moving contact, and the two moving contacts are arranged side by side on the contact support 53; two static contacts are arranged on the corresponding static contact 220, and the movable contact 530 formed by the two movable contact pieces 521 and the static contact 220 form a double contact. The first terminal 21, the first movable contact piece, the fixed contact 220 and the second terminal 22 form a first loop, the first terminal 21, the second movable contact piece, the fixed contact 220 and the second 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, increases the contact reliability and current-carrying capacity of the contact, and can reduce electric repulsion force to cause unnecessary repulsion of the contact to cause fusion welding, thereby prolonging the service life of the contact.

Preferably, the two movable contacts 531 are arranged side by side at intervals, a small gap is formed between the adjacent side edges of the two movable contacts 531, and positioning protrusions are arranged on the adjacent side edges of the two movable contacts 531 to form a gap, so that the two movable contacts 531 can be independently and rotatably adjusted, the two movable contacts are respectively in full contact fit with the two fixed contacts, and the problem of insufficient contact between a certain movable contact and the fixed contact caused by mutual interference and non-positioning on a plane due to processing and the like of the two movable contacts and/or the two fixed contacts is avoided. The first terminal 21 is connected to the first movable contact piece and the second movable contact piece, respectively. The fixed contact 220 is provided with two fixed contacts, and the second terminal 22 is connected with the fixed contact 220. Or as another embodiment of the static contact 220, the static contact 220 includes two static contacts arranged side by side, both of the two static contacts are provided with static contacts, and the second terminal 22 is connected to the two static contacts respectively.

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 movable contacts 531 are both provided with movable contacts, one end provided with the movable contacts extends out of the first opening 5341, and the contact spring 535 is loaded into 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 moving contact 530 of the moving contact assembly of this embodiment is provided with two moving contacts 531, which not only can increase the contact reliability and current-carrying capacity of the contacts, but also can reduce the electric repulsive force to make the contacts unnecessarily open to cause fusion welding, and the two moving contacts 531 are easy to assemble and 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 moving contact 531 to form a reliable assembly.

The two movable contact pieces 531 are symmetrically arranged and arranged in parallel in the contact cavity 534, and one end provided with the movable contact extends out of the contact cavity 534; the movable contact 531 is provided with a sixth protrusion 5302 at one end for reinforcing connection of the movable contact, the movable contact may be a silver alloy contact or a contact made of other materials, and may be further coated with a graphene plating layer, the movable contact is welded on one end side of the movable contact 531 against the sixth protrusion 5302, the sixth protrusion 5302 is closer to the end of the movable contact 531 than the movable contact, the movable contact is protected, and connection of the movable contact can be reinforced, the sixth protrusion 5302 extends outwards for a section to be provided with an arc striking end 5303, and the other end of the movable contact 531 is provided with a fifth protrusion 5301 for limiting matching with the contact spring 535 to limit the elastic arm 5352 or 5353 of the contact spring 535.

The middle parts of the side edges of the two movable contacts 531, which are far away from each other, are provided with fourth protrusions 5304, one end of each movable contact 531, which is provided with a fifth protrusion 5301, is located in the contact cavity 534, the end provided with the movable contact extends out of the contact cavity 534 from the first opening 5341, the fourth protrusion 5304 is located inside the contact cavity 534 and abuts against the side wall of the first opening 5341 and is used for limiting the position of the movable contact 531, which extends out of the contact cavity 534, a cavity side wall protrusion 5342 is arranged in the contact cavity 534, the cavity side wall protrusion 5342 is arranged close to the first opening 5341, the middle part of each movable contact 531 abuts against the cavity side wall protrusion 5342 under the action of the contact spring 535, so that the two movable contacts 531 can respectively rotate to achieve overtravel based on the cavity side wall protrusion 5342 as a fulcrum, the fourth protrusion 5304 abuts against the side wall of the first opening 5341 of the contact cavity 534, and one end of the contact spring 535 is limited to the fifth protrusion 5301 of the movable contact 531 and is relatively fixed on the contact support 53.

The contact spring 535 of the present embodiment is formed by integrally connecting two rotating bodies, each of which is provided with two elastic arms, one elastic arm of the two rotating bodies is bent and connected with each other to form a connecting portion 5351, the other elastic arm of the two rotating bodies is oppositely arranged at an interval 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 connecting portion 5351 of the contact spring 535 acts on the contact support 53, and the two elastic arms 5352 and 5353 act on the two movable contacts 531 respectively and are in limit fit with the fifth protrusion 5301. The contact spring 535 of this embodiment is integrally formed by two rotating bodies for easy assembly, but two independent springs may be used for assembling the movable contact 531 as required. The contact spring 535 may be a compression spring, a leaf spring, or other types of spring structures.

As shown in fig. 3-5, a preferred embodiment of a first terminal 21 and a second terminal 22. The first terminal 21 is integrally formed, a first end of the first terminal is connected to the connection 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 to the movable contact 530 through a flexible conductor, the first terminal 21 is further provided with a first tab 213, and the first tab 213 extends from a position close to a breaking position of the movable contact 530 to the direction of the arc extinguish chamber 60 of the arc extinguishing mechanism 6. The second terminal 22 is integrally formed, a first end of the second terminal is connected with the connecting terminal 23 or extends out of the housing 1 to serve as an outlet terminal, a second end of the second terminal is provided with a static contact to serve as a static contact 220, namely, the static contact 220 and the second terminal 22 are integrally formed, the second terminal 22 is further provided with a second arc striking plate 223, the second arc striking plate 223 extends from the static contact 220 to the direction of the arc extinguish chamber 60 of the arc extinguishing mechanism 6, the first terminal 21 and the second terminal 22 which are connected with the moving contact 530 and the static contact 220 are directly used as inlet and outlet terminals, and the second terminal 22 and the static contact 220 are integrally formed.

The first arc striking plate 213 and the second arc striking plate 223 are respectively and closely arranged at two sides of the arc extinguish chamber 60 in the second direction, and respectively introduce electric arcs generated when the moving contact and the static contact are disconnected into the arc extinguish chamber 60, so that rapid arc extinction is realized. The plane of the first arc striking plate 213 and the plane of the second arc striking plate 223 are substantially parallel to the plane of the arc extinguishing grid plate of the arc extinguishing chamber 60, the second arc striking plate 223, the arc extinguishing chamber 60 and the first arc striking plate 213 are sequentially arranged along the length direction of the shell 1, and the plane of the swing direction of the movable contact 530 is parallel to the length direction of the shell 1.

The first connecting piece 214 is arranged between the first end and the second end of the first terminal 21, the second connecting piece 224 is arranged between the first end and the second end of the second terminal 22, and the first connecting piece 214 and the second connecting 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 other embodiments, the first terminal 21 may also be provided with an integrated shunt as the current sampling device 7.

Specifically, the first terminal 21 includes a first outer contact piece 211, a first contact piece 214, a first inner contact piece 212 and a first arc piece 213, which are connected in sequence and serve as a first end, the first inner contact piece 212 is connected with one end of the first contact piece 214 in a bending manner, the first inner contact piece 212 is electrically connected with the movable contact 530, the first inner contact piece 212 is electrically connected with two movable contact pieces 531 through two flexible wires, the first outer contact piece 211 is connected with the other end of the first contact piece 214 in a bending manner, the first outer contact piece 211 is connected with the connection terminal 23, the first arc piece 213 is connected with one side edge of the first inner contact piece 212, the planes of the first arc piece 213, the first inner contact piece 212 and the first outer contact piece 211 are parallel to and perpendicular to the plane of the first contact piece 214, and the current sampling device 7 is coupled with the first contact piece 214. The second terminal 22 includes a second outer contact piece 221, a second connection piece 224, a second inner contact piece 222, and a second arc piece 223, which are connected in sequence and serve as a first end, the second inner contact piece 222 is connected with one end of the second connection piece 224 in a bending manner, the second outer contact piece 221 is connected with the other end of the second connection piece 224 in a bending manner, the second outer contact piece 221 is connected with the terminal 23, the second arc piece 223 is connected with one side edge of the second inner contact piece 222, the second arc piece 223, the second inner contact piece 222, and the second outer contact piece 221 are parallel to a plane in which the second connection piece 224 is located and perpendicular to the plane in which the second connection piece 224 is located, the second inner contact piece 222 is electrically connected with the stationary contact 220, and preferably, two stationary contacts are arranged on the second inner contact piece 222 and serve as the stationary contact 220.

The explosion chamber 60 includes the arc-extinguishing chamber and sets up a plurality of arc extinguishing bars piece in the arc-extinguishing chamber, and the range upon range of interval of a plurality of arc extinguishing bars piece sets up, and the one end that is close to moving contact 530 is equipped with the arc extinguishing breach, the one end that the explosion chamber 60 is close to the moving contact is the inlet end, and the other end is the exhaust end, and the range upon range of orientation of a plurality of arc extinguishing bars piece is the direction of height of explosion chamber 60 promptly. The first and second arc ignition pieces 213 and 223 are respectively disposed at both sides of the height of the arc extinguishing chamber 60 in the second direction. Preferably, the first outer connecting piece 211, the first arc striking piece 213, the arc extinguishing chamber 60, the second arc striking piece 223 and the second outer connecting piece 221 are arranged side by side at intervals in the second direction, have the same length extending direction and all extend along the first direction. The first arc striking plate 213 and the first inner connecting plate 212 are integrally arranged opposite to the first outer connecting plate 211, and the first connecting plate 214 is connected between the first inner connecting plate 212 and the first outer connecting plate 211 to enable the first terminal 21 to be in an approximately U-shaped structure; the second arc striking piece 223 and the second inner connecting piece 222 are integrally arranged opposite to the second outer connecting piece 221, the second connecting piece 224 is connected between the second inner connecting piece 222 and the second outer connecting piece 221 to enable the second terminal 22 to be of an approximate U-shaped structure, the first terminal 21 is integrally provided with the first arc striking piece 213, and the second terminal 22 is integrally provided with the fixed contact 220 and the second arc striking piece 223, so that the structure is simple and the assembly is convenient. The first terminal 21 and the second terminal 22 are arranged on two sides of the arc extinguish chamber at intervals side by side, so that the whole loop from the wire inlet end to the wire outlet end of the switch is positioned at one end of the switch, and the loop is compact in structure.

Preferably, as shown in fig. 3-4, the electric operating mechanism 3 and the moving contact assembly of the present embodiment are mounted on the electric operating housing 8 to form a driving module and then mounted in the housing 1, which is highly reliable, efficient in assembly and convenient for automatic assembly. Specifically, the driving module includes an electrical operation housing 8, an electrical operation mechanism 3 and a moving contact assembly, the electrical operation mechanism 3 includes 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, the moving contact assembly includes 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 movable contact 530 provided with a movable 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 microswitch, 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 operating housing 8, one end of the electric operating 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 operating housing 8, and the lever 51 is disposed between the motor 1 and the contact support 53. Referring to the second embodiment of the electric operating mechanism 3 shown in fig. 6-7, the lever 51 is arranged at one end of the electric operating housing 8, the contact support 53 is rotatably arranged at the other end of the electric operating housing 8, and the motor 1 is arranged between the lever 51 and the contact support 53.

Preferably, the electric operating housing 8 of the present embodiment includes an electric operating first housing 82 and an electric operating second housing 83, the electric operating first housing 82 and the electric operating second housing 83 are relatively buckled to form a module accommodating chamber, a partition 81 is disposed in the electric operating housing 8 to divide the module accommodating chamber into an electric operating first space and an electric operating second space, the electric operating first space is formed between the partition 81 and the electric operating first housing 82, the electric operating second space is formed between the partition 81 and the electric operating second housing 83, a gear set 30 is disposed in the electric operating first space, a transmission mechanism 5, a moving contact assembly and a control circuit 4 are disposed in the electric operating second space, a communication hole is disposed between the electric operating first space and the electric operating second space, and an output gear 33 of the gear set 30 is disposed in the electric operating first space through the communication hole driving lever 51, or disposed in the electric operating second space and is in driving cooperation with the transmission gear 32 through the communication hole. Specifically, a plurality of transmission gears 32 and output gears 33 are installed in an electrically operated first space of one side of the partition 81, and the lever 51, the link 52, the contact support 53 and the movable contact 530 are installed in an electrically operated second space of the other side of the partition 81. The partition plate 81, the first electrically operated housing 82 and the second electrically operated housing 83 are provided with assembling structures at corresponding positions, and the assembling structures are assembling holes and the like which are fastened or fixed by rivets or screws.

Embodiment two as shown in fig. 13-14

This embodiment is different from the first embodiment in that the connection terminal 23 is not provided inside the switch, and the ends of the first terminal 21 and the second terminal 22 for connection are extended outside the switch for connection. Preferably, the part of first wiring end 21 and second wiring end 22 that stretches out the shell 1 is the wiring board structure, and with outside female row clamp carry out plug connection, the user can set up corresponding binding post 23 at the part that first wiring end 21 and second wiring end 22 stretch out the switch outside as required in addition with different mode of connection or do not set up binding post 23 direct wiring all can.

It should be noted that, in the description of the present invention, the terms "upper", "lower", "left", "right", "inner", "outer", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings or the orientation or positional relationship that is usually placed when used, and are only for convenience of description, but do not indicate that the device or element that is 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 one description from another, and are not to be construed as indicating relative importance.

The foregoing is a more detailed description of the present invention, taken in conjunction with the specific preferred embodiments thereof, and it is not intended that the invention be limited to the specific embodiments shown and described. To the utility model belongs to the technical field of ordinary technical personnel, do not deviate from the utility model discloses under the prerequisite of design, can also make a plurality of simple deductions or replacement, all should regard as belonging to the utility model discloses a protection scope.

Claims (10)

1. A switch comprises a moving contact (530), a fixed contact (220), a first terminal (21) and a second terminal (22), wherein one end of the first terminal (21) and one end of the second terminal (22) are respectively connected with the moving contact (530) and the fixed contact (220), and the other ends of the first terminal and the second terminal are used as wire inlet and outlet ends of the switch, and the switch is characterized in that: the moving contact (530) comprises two moving contacts (531), and the two moving contacts (531) are provided with moving contacts and are arranged on the contact support (53) side by side; two static contacts are arranged on the static contact (220), and the second terminal (22) and the static contact (220) are integrally formed; the second terminal (22) is provided with a second arc striking piece (223) which is integrally formed; and/or the first terminal (21) is provided with a first arc striking sheet (213) which is integrally formed.

2. The switch of claim 1, wherein: the first terminal (21) is also integrally provided with a shunt.

3. The switch of claim 1, wherein: the contact support (53) is radially 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), a cavity side wall protrusion (5342) is arranged in the contact cavity (534), the cavity side wall protrusion (5342) is arranged close to the first opening (5341), the middle part of the movable contact piece (531) is abutted against the cavity side wall protrusion (5342) under the action of a contact spring (535), so that the two movable contact pieces (531) can respectively rotate based on the cavity side wall protrusion (5342) as a fulcrum.

4. The switch of claim 3, wherein: one end of the movable contact piece (531) is provided with a sixth protrusion (5302), the movable contact is abutted against the sixth protrusion (5302) and welded on one end side face of the movable contact piece (531), the sixth protrusion (5302) is closer to the end portion of the movable contact piece (531) relative to the movable contact, an arc striking end (5303) extends outwards from the sixth protrusion (5302), and the other end of the movable contact piece (531) is provided with a fifth protrusion (5301) used for being in limit fit with the contact spring (535).

5. The switch of claim 1, wherein: the first terminal (21) comprises a first outer connecting piece (211), a first connecting piece (214), a first inner connecting piece (212) and a first arc striking piece (213) which are connected in sequence; the first inner connecting piece (212) is electrically connected with the two movable contact pieces (531), the first outer connecting piece (211) extends out of the shell (1) and is connected with the wiring terminal (23), the first arc striking piece (213) is connected with one side edge of the first inner connecting piece (212), and the planes of the first arc striking piece (213), the first inner connecting piece (212) and the first outer connecting piece (211) are parallel.

6. The switch of claim 5, wherein: the second terminal (22) comprises a second outer connecting piece (221), a second connecting piece (224), a second inner connecting piece (222) and a second arc striking piece (223) which are connected in sequence, the second outer connecting piece (221) extends out of the shell (1) to be connected with the terminal (23), the second arc striking piece (223) is connected with one side edge of the second inner connecting piece (222), the plane where the second arc striking piece (223), the second inner connecting piece (222) and the second outer connecting piece (221) are located is parallel, and two static contacts are arranged on the second inner connecting piece (222) to serve as a static contact (220).

7. The switch of claim 6, wherein: the first outer connecting piece (211), the first arc striking piece (213), the arc extinguishing chamber (60), the second arc striking piece (223) and the second outer connecting piece (221) are arranged side by side at intervals.

8. The switch of claim 7, wherein: the first arc ignition piece (213) and the first inner connecting piece (212) are integrally arranged opposite to the first outer connecting piece (211), and the first connecting piece (214) is connected between the first inner connecting piece (212) and the first outer connecting piece (211); the second arc striking piece (223) and the second inner connecting piece (222) are integrally arranged opposite to the second outer connecting piece (221), and the second connecting piece (224) is connected between the second inner connecting piece (222) and the second outer connecting piece (221).

9. The switch of claim 5, wherein: the first connecting piece (214) passes through a current transformer as a current sampling device (7).

10. The switch of any one of claims 1-9, wherein: including the electricity behaviour mechanism, the electricity behaviour mechanism includes motor (31), gear train (30) and drive mechanism (5), and motor (31) pass through gear train (30) drive mechanism (5), and drive mechanism (5) are connected with contact support (53).

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