CN214956603U - Switch device and rotary switch - Google Patents

Abstract

The utility model relates to the field of low-voltage electrical appliances, in particular to a switch device, wherein a static contact group comprises a second static contact, and an arc extinguish chamber is arranged on one side of the second static contact; the moving contact mechanism comprises a contact support, a moving contact group and an arc blocking piece, the contact support, the moving contact group and the arc blocking piece are arranged in the device shell in a pivoting mode, the arc blocking piece is arranged on the contact support and is positioned between the contact support and the arc extinguishing chamber, the arc blocking piece comprises an arc blocking piece side wall, the moving contact group is arranged on the contact support, and one end of the moving contact group penetrates through the arc blocking piece to be matched with a second fixed contact; after the movable contact group is disconnected with the second fixed contact, the side wall of the arc blocking piece is opposite to the inlet of the arc extinguishing chamber; the utility model discloses switching device, its arc extinguishing performance is good. The utility model discloses still relate to one kind and include switching device's rotary switch, its arc extinguishing performance is good.

Description

Switch device and rotary switch

Technical Field

The utility model relates to a low-voltage apparatus field, concretely relates to switching device and one include switching device's rotary switch.

Background

The contact mechanism of the existing rotary switch, such as an isolating switch, a circuit breaker and the like, comprises a moving contact mechanism and a static contact group, the moving contact mechanism comprises a contact support and a moving contact group which are the same with a rotating shaft, the static contact group comprises a first static contact and a second static contact which are respectively arranged at two sides of the moving contact mechanism, one end of the moving contact group is rotationally connected with the first static contact, and the other end of the moving contact group is closed or disconnected with the second static contact; the existing rotary switch has the following problems:

1. the first static contact and the second static contact are both flat plate-shaped structures, the rotating shaft of the moving contact (or the contact support) is positioned on a plane passing through the thickness center positions of the first static contact and the second static contact, and the rotating shafts of the moving contact (or the contact support) are both positioned at the center position of the shell of the rotary switch, so that the shell of the rotary switch cannot be miniaturized under the condition of allowing the minimum opening distance to be determined;

2. the existing rotary switch has poor arc extinguishing performance, and the movable contact group and the second fixed contact are disconnected to generate electric arcs which cannot enter an arc extinguishing chamber to be extinguished quickly.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the defects of the prior art and provide a switching device with good arc extinguishing performance; also provided is a rotary switch including the switching device, which has good arc extinguishing performance.

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

a switching device comprises a device shell, a moving contact mechanism, a static contact group and an arc extinguish chamber, wherein the moving contact mechanism, the static contact group and the arc extinguish chamber are arranged in the device shell; the moving contact mechanism comprises a contact support, a moving contact group and an arc blocking piece, the contact support, the moving contact group and the arc blocking piece are arranged in the device shell in a pivoting mode, the arc blocking piece is arranged on the contact support and is positioned between the contact support and the arc extinguishing chamber, the arc blocking piece comprises an arc blocking piece side wall, the moving contact group is arranged on the contact support, and one end of the moving contact group penetrates through the arc blocking piece to be matched with a second fixed contact; and after the movable contact group is disconnected with the second fixed contact, the side wall of the arc blocking piece is opposite to the inlet of the arc extinguishing chamber.

Preferably, a channel for swinging one end of the movable contact group is arranged between the contact support and the arc extinguish chamber, and after the movable contact group is disconnected from the second fixed contact, the side wall of the arc blocking piece shields the channel.

Preferably, the device housing is provided with a separation structure between the contact support and the arc extinguishing chamber, the arc blocking piece is positioned on one side of the separation structure far away from the arc extinguishing chamber, and a channel for swinging the movable contact group is formed on the separation structure.

Preferably, the side wall of the arc blocking piece is an arc-shaped side wall, and the side wall of the separation structure close to the side of the contact support is an arc-shaped separation side wall of the arc blocking piece.

Preferably, the separation structure includes two first blocking ribs protruding along the thickness direction of the device housing and arranged on the inner side of the side wall of the device housing, and a second blocking rib protruding and arranged on the inner side of the bottom wall of the device housing, the first blocking rib and the second blocking rib enclose the channel, the second static contact is arranged on one first blocking rib, one end of the second blocking rib is connected with the other first blocking rib, the second blocking rib extends to the second static contact, and the side wall of the arc blocking member swings between the two first blocking ribs.

Preferably, the contact support is of a cylindrical structure, a moving contact channel extending along the radial direction of the contact support is arranged in the middle of the contact support, and the moving contact group is inserted into the moving contact channel.

Preferably, the arc blocking piece protrudes out of one side of the contact support and is a gas-generating arc blocking piece made of a gas-generating material, and the arc blocking piece and the contact support are installed in a clamping mode.

Preferably, the arc blocking piece comprises an arc blocking piece hole structure for the movable contact group to pass through; the arc blocking piece hole structure is an integral hole for the movable contact group to pass through; or the arc blocking piece hole structure comprises a plurality of moving contact holes arranged side by side at intervals, and a plurality of moving contacts of the moving contact group respectively penetrate through the arc blocking piece through one moving contact hole.

Preferably, the fixed contact group further comprises a first fixed contact, the first fixed contact and the second fixed contact are respectively arranged on two sides of the moving contact mechanism, and the other end of the moving contact group is rotatably connected with one end of the first fixed contact; the contact support coincides with the axis of rotation of the movable contact set.

A rotary switch comprising at least one of said switching devices; the rotary switch also comprises an operating mechanism in driving fit with the switch device, and the operating mechanism drives the moving contact mechanism to rotate so as to close or open the moving contact group and the second fixed contact.

The utility model discloses switching device, the electric arc that its movable contact group and second static contact disconnection produced can be under the effect of keeping off arc spare lateral wall, gets into rapidly and is extinguished in the arc extinguish chamber, shortens the arc extinguishing time, avoids or is showing the circumstances that reduces movable contact group and second static contact and be burnt and lose, still is favorable to reducing the interior temperature rise of switching device, keeps off arc spare lateral wall moreover and can block electric arc and support the direction removal to the contact, has protected the contact and has supported inside structure.

In addition, a relatively sealed space is defined by the side wall of the arc blocking part, the second fixed contact, the separation structure of the device shell and the arc extinguishing chamber, and after the movable contact group and the second fixed contact are disconnected, the generated electric arc enables the air pressure in the space to be increased, so that the electric arc can be pushed into the arc extinguishing chamber quickly, the arc is extinguished more quickly, and the arc extinguishing performance of the switch device is improved.

The utility model discloses rotary switch, include switching device is showing the arc extinguishing performance that has improved rotary switch.

Drawings

Fig. 1 is a schematic structural diagram of the rotary switch of the present invention;

fig. 2 is a schematic view of a projection structure of the switching device of the present invention, in which the movable contact group and the second stationary contact are in a closed state;

fig. 3 is a schematic perspective view of the switching device of the present invention, in which the moving contact set and the second stationary contact are in a closed state;

fig. 4 is an exploded schematic view of the switching device of the present invention, in which the moving contact set and the second stationary contact are in a closed state;

fig. 5 is a schematic view of a projection structure of the switching device of the present invention, in which the movable contact group and the second stationary contact are in an off state;

fig. 6 is a schematic perspective view of the switch device of the present invention, in which the movable contact group and the second stationary contact are in an off state;

fig. 7 is an exploded schematic view of the switching device of the present invention, in which the moving contact group and the second stationary contact are in an open state;

fig. 8 is a schematic structural diagram of the movable contact group and the fixed contact group of the present invention, the movable contact group and the second fixed contact are in a closed state;

fig. 9 is a schematic structural diagram of the moving contact set and the fixed contact set of the present invention, where the moving contact set and the second fixed contact are in an off state;

fig. 10 is a schematic view of an assembly structure of the moving contact mechanism of the present invention;

fig. 11 is an explosion structure diagram of the moving contact mechanism of the present invention.

Detailed Description

Embodiments of the contact mechanism, the switching device comprising the contact mechanism, and the rotary switch comprising the switching device according to the present invention will be further described with reference to the embodiments shown in fig. 1 to 11. The contact mechanism of the present invention, the switch device including the contact mechanism, and the rotary switch including the switch device are not limited to the description of the following embodiments.

As shown in fig. 1, the rotary switch of the present invention includes an operating mechanism 1A and at least one switching device 1B, each switching device 1B includes a device housing 1, and a moving contact mechanism 3, a stationary contact group and an arc extinguish chamber 4 respectively disposed in the device housing 1, the moving contact mechanism 3 includes a contact support 30 pivotally disposed in the device housing 1 and at least one moving contact group 32 disposed on the contact support 30, the stationary contact group includes a second stationary contact 21; the operating mechanism 1A drives the movable contact mechanism 3 to rotate, so that the movable contact group 32 is closed or disconnected with the second fixed contact 21.

As shown in fig. 1, the rotary switch of the present invention is preferably an isolating switch, the switch device 1B is an isolating chamber, a plurality of isolating chambers are arranged side by side, the operating mechanism 1A is arranged at one end of the isolating switch and arranged side by side with the isolating chamber, and the moving contact mechanism 3 of each isolating chamber is arranged in a linkage manner and is in driving cooperation with the operating mechanism 1A. Further, the utility model discloses rotary switch still includes the linkage 1C with the coaxial setting of contact support 30, links through linkage 1C between two contact supports 30 of adjacent isolation chamber. Further, the end of the contact support 30 is provided with a driving hole for engaging with the link member 1C. Of course, the utility model discloses rotary switch still can not set up linkage 1C, but through the cooperation of mortise and tenon structure between the adjacent contact support 30 in order to realize the linkage, also be in two adjacent contact support 30, the one end of a contact support 30 is equipped with the recess, and another contact support 30 one end is equipped with the arch, and arch and recess cooperation to realize the linkage of adjacent contact support 30.

It should be noted that the movable contact mechanism 3 of each switching device 1B may also be arranged in a linkage manner through a plurality of linkage shafts, for example, adjacent contact supports 30 are connected through at least two linkage shafts, and two ends of each linkage shaft are respectively inserted into two contact supports 30; alternatively, the movable contact mechanism 3 of each of the switch devices 1B may be arranged in a linkage manner by one or more linkage shafts penetrating through each of the contact supports 30.

The utility model discloses a rotary switch still can be the circuit breaker, and switching device 1B is the utmost point that opens circuit, and each opens circuit the utmost point and sets up side by side, and operating device 1A strides and establishes in one of them utmost point top that opens circuit, and the 3 linkages of moving contact mechanism of each utmost point that opens circuit set up and cooperate with operating device 1A drive. It is to be noted that the breaker pole refers to a pole circuit structure including a contact mechanism that can break an electric circuit.

The utility model discloses rotary switch is preferred is isolator or circuit breaker, and its operating device 1A all can realize through prior art, no longer expandes the description here to operating device 1A's structure.

The contact mechanism, the switching device comprising said contact mechanism and the rotary switch comprising said switching device according to the present invention will be further described with reference to the following embodiments.

As shown in fig. 1, the rotary switch of this embodiment is an isolating switch, which includes an operating mechanism 1A and at least one switching device 1B that are in driving fit, where the switching device 1B is an isolating chamber, and includes a device housing 1, and a moving contact mechanism 3, a stationary contact group, and an arc extinguish chamber 4 that are respectively disposed in the device housing 1, where the moving contact mechanism 3 includes a contact support 30 pivotally disposed in the device housing 1, and at least one moving contact group 32 inserted in the contact support 30, and the stationary contact group includes a second stationary contact 21; the operating mechanism 1A drives the movable contact mechanism 3 to rotate, so that the movable contact group 32 and the second fixed contact 21 are closed or opened.

Preferably, as shown in fig. 1, the rotary switch of the present embodiment includes a linkage 1C, the linkage 1C is disposed coaxially with the contact support 30, the number of the switch devices 1B is greater than or equal to 1, the rotary switch of the present embodiment is a three-phase switch, and includes 3 switch devices 1B, and adjacent switch devices 1B are disposed in a linkage manner through the linkage 1C. Further, as shown in fig. 1, the link 1C is a cylindrical member having a polygonal cross section. It should be noted that the number of the switch devices of the rotary switch of the present invention is adjusted according to the actual requirement, which may be a two-phase switch, and the number of the switch devices 1B is 2; or, the rotary switch of the utility model can also be used to switch on or off the single-phase circuit, and the number of the switch devices is 1; or, the utility model discloses rotary switch can also be applied to the circuit of three-phase four-wire mode, and then switching device 1B's number is 4.

Preferably, as shown in fig. 2 to 7, the movable contact mechanism 3 further includes an arc blocking member 31 disposed on the contact support 30, the arc blocking member 31 is located between the contact support 30 and the arc extinguishing chamber 4, one end of the movable contact group 32 passes through the arc blocking member 32 and then is engaged with the second stationary contact 21, and the arc blocking member 31 includes an arc blocking member side wall 310; after the moving contact group 32 is disconnected from the second fixed contact 21, the arc blocking member sidewall 310 is opposite to the inlet of the arc extinguish chamber 4, and the arc blocking member sidewall 310 extends from the second fixed contact 21 to the end of the moving contact group 32 matched with the second fixed contact 21 (as shown in fig. 5, that is, one end of the arc blocking member sidewall 310 is close to the second fixed contact 21, and the other end is close to the end of the moving contact group 32 matched with the second fixed contact 21, so that the arc blocking member sidewall 310 is opposite to the inlet of the arc extinguish chamber 4), thereby blocking the arc from flowing to the side of the contact support 30. The arc generated by the disconnection of the moving contact group 32 and the second fixed contact 21 can rapidly enter the arc extinguish chamber 4 to be extinguished under the action of the arc blocking member side wall 310, so that the arc extinguishing time is shortened, the situation that the moving contact group 32 and the second fixed contact are burnt and damaged is avoided or remarkably reduced, and the arc blocking member side wall 310 can block the arc from moving towards the direction of the contact support 30, thereby protecting the internal structure of the contact support 30.

Preferably, as shown in fig. 2-7 and 10, the arc blocking member 31 is protrudingly disposed on one side of the contact support 30, the arc blocking member 31 protrudes toward the direction of the arc extinguishing chamber 4, one end of the movable contact group 32 penetrates through the arc blocking member 32 and then is matched with the second fixed contact 21, the arc blocking member 31 and the movable contact group 32 rotate along with the contact support 30, one end of the movable contact group 32 swings back and forth to be in contact with or separated from the second fixed contact 21, the arc extinguishing chamber 4 is disposed opposite to the movable contact group 32 and the second fixed contact 21, and is used for extinguishing an arc generated when the movable contact group 32 and the second fixed contact 21 are separated, a channel through which one end of the movable contact group 32 swings is disposed between the contact support 30 and the arc extinguishing chamber 4, and when one end of the movable contact group 32 is separated from the second fixed contact 21, an arc blocking member sidewall 310 of the arc blocking member 31 is opposite to the arc extinguishing chamber 4 to block the channel.

As shown in fig. 2, when one end of the moving contact group 32 contacts and closes the second fixed contact 21, the arc blocking member side wall 310 rotates to a position opposite to the second fixed contact 21, and at this time, the channel between the arc extinguishing chamber 4 and the contact support 30 is communicated. As shown in fig. 5, when one end of the movable contact group 32 is disconnected from the second fixed contact 21, the arc blocking member side wall 310 rotates to a position opposite to the inlet of the arc extinguishing chamber 4, extends along the gap formed when the movable contact and the fixed contact are opened, blocks the channel between the arc extinguishing chamber 4 and the contact support 30, and blocks the arc generated when the movable contact group 32 is disconnected from the second fixed contact 21 from flowing to one side of the contact support 30.

Specifically, as shown in fig. 5, the lower end of the moving contact group 32 passes through the arc blocking member 31 and then is matched with the second fixed contact 21, after the moving contact group 32 is disconnected from the second fixed contact 21, the arc blocking member side wall 310 is located right above the inlet of the arc extinguish chamber 4, and the arc blocking member side wall 310 extends from the second fixed contact 21 to the lower end of the moving contact group 32.

Preferably, the arc blocking member 31 is a gas-generating arc blocking member made of a gas-generating material (such as polyoxymethylene or nylon 66), and the arc blocking member 31 is clamped with the contact support 30, so that the arc generated by the breaking of the movable contact group 32 and the second fixed contact 21 generates gas, thereby further increasing the speed of the arc moving to the arc extinguishing chamber.

Preferably, as shown in fig. 4 and 5, the device housing 1 is provided with a separating structure between the contact support 30 and the arc extinguishing chamber 4, the arc blocking member 31 is located on a side of the separating structure away from the arc extinguishing chamber 4, a channel for swinging the moving contact set 32 is formed on the separating structure, one end of the moving contact set 32 passes through the channel and extends to an inlet of the arc extinguishing chamber 4, and after one end of the moving contact set 32 is disconnected from the second stationary contact 21, the channel is blocked by the arc blocking member side wall 310. The arc blocking part side wall 310, the second fixed contact 21, the device shell 1 and the arc extinguish chamber 4 enclose a relatively sealed space, and after the movable contact group 32 and the second fixed contact 21 are disconnected, the generated electric arc enables the air pressure in the space to rise, so that the electric arc can be pushed into the arc extinguish chamber 4 quickly, the arc is extinguished more quickly, and the arc extinguishing performance of the switch device is improved.

Preferably, the arc-blocking member side wall 310 is a circular arc-shaped side wall, and the side wall of the separating structure close to the contact support 30 is a circular arc-shaped separating side wall which is identical to the arc-blocking member side wall 310.

Preferably, as shown in fig. 4 and 5, the partition structure includes a first blocking rib 12 protruding from the inner side of the side wall of the device housing 1 in the thickness direction of the device housing 1, and a second blocking rib 11 protruding from the inner side of the bottom wall of the device housing 1, and the first blocking rib 12 and the second blocking rib 11 define the channel. In this embodiment, the partition structure is provided with two first blocking ribs 12, the second stationary contact 21 is disposed on one first blocking rib 12, one end of the second blocking rib 11 is connected to the other first blocking rib 12, the second blocking rib 11 extends to the second stationary contact 21, and the arc blocking member side wall 310 swings between the two first blocking ribs 12. Specifically, as shown in fig. 6 and 7, the device housing 1 includes two housing halves that are opposite to each other, two second blocking ribs 11 are respectively disposed on the two housing halves that are opposite to each other, and the first blocking rib 12 is also divided into two segments that are respectively disposed on the two housing halves; one end of each of the two second blocking ribs 11 is connected to two ends of one of the first blocking ribs 12, and the other end of each of the two second blocking ribs extends to at least the second stationary contact 21 or the other first blocking rib 12. As shown in fig. 5, after the movable contact group 32 is disconnected from the second stationary contact 21, one end of the arc blocking member sidewall 310 is adjacent to the second stationary contact 21, the other end of the arc blocking member sidewall 310 is engaged with the other first blocking rib 12 of the device housing 1, and the arc-shaped side edge of the arc blocking member sidewall 310 is engaged with the second blocking rib 11 to block the channel and prevent the arc from flowing to the side of the contact support 30.

As shown in fig. 11, is a preferred embodiment of the contact support 30. The contact support 30 has a cylindrical structure, a moving contact passage 302 extending along a radial direction of the contact support is provided at a middle portion of the contact support, and the moving contact group 32 is inserted into the moving contact passage 302. Further, as shown in fig. 11, the contact support 30 is provided with support shafts 301 at two ends, the support shafts 301 are rotatably inserted into the support shaft holes of the device housing 1, and the support shaft 301 is provided with a support connection hole 3010 at the middle portion thereof for cooperating with the linkage 1C.

Preferably, as shown in fig. 11, a plurality of support heat dissipation holes 303 are further provided on the column body of the contact support 30, and each support heat dissipation hole 303 is respectively communicated with the movable contact channel 302.

As shown in fig. 10 and 11, is a preferred embodiment of the arc stop member 31. The arc blocking piece 31 is a gas-generating arc blocking piece made of a gas-generating material and comprises an arc blocking piece main body, the arc blocking piece main body is provided with an arc blocking piece hole structure for the movable contact group 32 to penetrate through, and one side, close to the arc extinguishing chamber 4, of the arc blocking piece main body is provided with an arc blocking piece side wall 310.

Preferably, the arc blocking member hole structure is an integral opening (not shown in the figures) for the movable contact group 32 to pass through; alternatively, as shown in fig. 11, the arc stop member aperture structure includes a plurality of movable contact apertures 312 spaced side-by-side. Preferably, a barrier rib is disposed between the moving contact holes 312, and the moving contacts 320 of the moving contact group 32 pass through the arc-blocking member 31 through one moving contact hole 312.

Preferably, as shown in fig. 11, the arc blocking member 31 is installed in a clamping manner with the contact support 30, the arc blocking member locking leg 311 is arranged on the other side of the arc blocking member main body, and the arc blocking member locking leg 311 is inserted into the movable contact channel 302 and is in limit fit with the contact support 30, so that the arc blocking member 31 is fixedly connected with the contact support 30. Further, keep off arc spare main part opposite side and be equipped with two sets of at least fender arc spare bayonet socket 311, every group keeps off arc spare bayonet socket 311 including two fender arc spare bayonet sockets 311 that relative interval set up, and every keeps off arc spare bayonet socket 311's free end and all is equipped with the trip, keeps off arc spare bayonet socket 311's trip orientation opposite direction with two of a set of.

Preferably, as shown in fig. 11, the arc blocking member main body includes a main body first portion 313 and a main body second portion 314, the main body second portion 314 is disposed at one end of the main body first portion 313 and is located in the middle of the end of the main body first portion, the width of the main body second portion 314 is smaller than that of the main body first portion 313, so that a right-angle notch is formed on both sides of the connection between the main body second portion 314 and the main body first portion 313. As shown in fig. 2, the upper end and the lower end of the device housing 1 are both provided with heat dissipation holes, and the right-angle notch of the arc blocking member 31 enables the heat dissipation holes at the upper end and the lower end to be better communicated, so that the structure of the switch device is compact, and the communication between the heat dissipation holes at the upper end and the lower end is realized, an air flow channel is formed in the device housing 1, especially, the switch device can be installed according to the direction shown in fig. 2 in the actual use, the lower cold air can enter the device housing 1 through the heat dissipation holes at the lower end, and is discharged through the heat dissipation holes at the upper end through the right-angle notch, thereby being beneficial to the heat dissipation of the switch device. In addition, the right-angle notch is matched with the second stop rib 11 of the device shell 1, so that the electric arc can not pass through the right-angle notch.

Preferably, as shown in fig. 2 to 7, the arc extinguishing chamber 4 comprises a plurality of radially distributed arc extinguishing grids, and the width of the inlet of the arc extinguishing chamber 4 is smaller than the width of the outlet of the arc extinguishing chamber 4.

Preferably, as shown in fig. 2 and 7, the device housing 1 is provided with a vent hole 10 communicating with the outlet of the arc extinguishing chamber 4. Furthermore, the exhaust hole 10 and the outlet of the arc extinguish chamber 4 are arranged oppositely, which is beneficial to the efficient exhaust of the gas generated by the arc extinguish chamber 4 from the device shell 1. Specifically, as shown in fig. 5, the second fixed contact 21, the arc blocking member 31, the first blocking rib 12, the second blocking rib 11 are matched with the device housing 1 to enclose the arc extinguish chamber 4 in a relatively closed space, and when the electric arc is extinguished, the pressure in the space is raised by the high temperature generated by the electric arc and the gas generated by the arc blocking member 31, so as to accelerate the speed of the electric arc entering the arc extinguish chamber 4 and accelerate the speed of the gas exhausted through the exhaust hole 10.

Preferably, as shown in fig. 8 and 9, the fixed contact group further includes a first fixed contact 20, the first fixed contact 20 and a second fixed contact 21 are respectively located at two sides of the movable contact mechanism 3, one end of the movable contact group 32 is rotatably connected to one end of the first fixed contact 20, the other end of the movable contact group is closed or opened to the second fixed contact 21, and the contact support 30 is overlapped with a rotation axis of the movable contact group 32. Of course, as another embodiment, the movable contact group 32 may not be rotatably connected to the first fixed contact 20, but may be in close or open cooperation with the first fixed contact 20 along with the rotation of the contact support 30, and at this time, an arc blocking member 31 may be disposed on a side of the contact support 30 facing the first fixed contact 20.

Preferably, the present invention further provides another main improvement point, as shown in fig. 8 and 9, the fixed contact group further includes a first fixed contact 20, the first fixed contact 20 and the second fixed contact 21 are respectively located at two sides of the movable contact mechanism 3, one end of the movable contact group 32 is rotatably connected to one end of the first fixed contact 20, the other end of the movable contact group is closed or opened to the second fixed contact 21, and the contact support 30 coincides with the rotation axis of the movable contact group 32. The rotating axis of the moving contact group 32 is located on the plane P-P, and when the included angle between the moving contact group 32 and the first fixed contact 20 is 180 degrees, the moving contact group 32 is located on the plane P-P; when the moving contact group 32 is disconnected from the second fixed contact 21, the other end (the end matched with the second fixed contact 21) of the moving contact group 32 is positioned on one side of the plane P-P; when the moving contact group 32 and the second fixed contact 21 are closed, the other end (the end matched with the second fixed contact 21) of the moving contact group 32 is located on the other side of the plane P-P. The ends of the moving contact group 32, which are matched with the second fixed contact 21, are respectively located on two sides of the plane P-P when the moving contact group 32 and the second fixed contact 21 are closed or disconnected, which is beneficial to increasing the distance between the moving contact group 32 and the second fixed contact 21 and is beneficial to the miniaturization design of the device shell 1.

Specifically, as shown in the directions of fig. 8 and 9, the upper end of the moving contact group 32 is connected to the lower end of the first static contact 20, and the lower end of the moving contact group 32 is closed or opened to the upper end of the second static contact 21; when the moving contact group 32 and the second fixed contact 21 are closed, the lower end of the moving contact group 32 is positioned on the left side of the plane P-P; when the moving contact group 32 is disconnected from the second fixed contact 21, the lower end of the moving contact group 32 is located on the right side of the plane.

Preferably, as shown in fig. 8, when the movable contact group 32 and the second fixed contact 21 are closed, the included angle α between the movable contact group 32 and the second fixed contact 21 is 171 and 179 °. Further, as shown in fig. 8, the included angle α is 172 °, which is beneficial to increasing the distance between the movable contact group 32 and the second fixed contact 21, and is beneficial to miniaturization design without enlarging the space of the existing device housing 1.

Preferably, as shown in fig. 8 and 9, the first fixed contact 20 is a straight plate structure, and the first fixed contact 20 is located on a plane P-P. Further, two side surfaces of the first fixed contact 20 in the thickness direction are parallel to the plane P-P. Specifically, the plane P-P is located in the middle of the first fixed contact 20 in the thickness direction of the first fixed contact 20. It should be noted that the shape of the first fixed contact 20 is not limited to the above one, for example, the first fixed contact 20 may also be a shape in which a plurality of straight plate portions are connected in a bending manner, the straight plate portion of the first fixed contact 20 connected to the movable contact group 32 is located on the plane P-P, and the included angle α between the movable contact group 32 and the second fixed contact 21 refers to the included angle α between the straight plate portion of the first fixed contact 20 rotationally connected to the movable contact group 32 and the movable contact group 32, which is not listed here. The plane P-P is therefore a plane formed by the first stationary contact 20 and on which the axis of rotation of the moving contact group 32 lies.

Preferably, as shown in fig. 8 and 9, the second fixed contact 21 includes a second fixed contact wiring board 210 and a second fixed contact plate 211 which are connected in a bent manner, and a second fixed contact 212 disposed on the second fixed contact plate 211; the second fixed contact terminal board 210 is located on the plane P-P, and the second fixed contact plate 211 is bent towards one side of the plane P-P; when the moving contact group 32 and the second fixed contact 21 are closed, the other end of the moving contact group 32 and the second fixed contact 212 are located on the same side of the plane P-P; when the moving contact group 32 is disconnected from the second fixed contact 21, the other end of the moving contact group 32 and the second fixed contact 212 are respectively located on two sides of the plane P-P. Specifically, as shown in fig. 8 and 9, the second fixed contact 21 is connected to an external circuit (not shown in the drawings) through a second fixed contact wiring board 210, the second fixed contact 212 and the second fixed contact wiring board 210 are respectively connected to two ends of a second fixed contact board 211, and the second fixed contact wiring board 210 is parallel to the first fixed contact 20 of the straight plate structure (or the second fixed contact wiring board 210 is parallel to a straight plate portion of the first fixed contact 20 connected to the movable contact group 32); the plane P-P is located in the middle of the second fixed contact terminal board 210 in the thickness direction of the second fixed contact terminal board 210, and the second fixed contact plate 211 is bent and inclined towards the left side of the plane P-P; when the moving contact 32 and the second fixed contact 21 are closed, the lower end of the moving contact group 32 and the second fixed contact 212 are both located on the left side of the plane P-P; when the moving contact group 32 and the second fixed contact 21 are disconnected, the lower end of the moving contact group 32 and the second fixed contact 212 are respectively positioned at the right side and the left side of the plane P-P.

Preferably, as shown in fig. 8 and 9, the first fixed contact 20 is a straight plate structure, and two side surfaces in the thickness direction of the straight plate structure are flush with two side surfaces in the thickness direction of the wiring board 210 of the second fixed contact, respectively.

Preferably, as shown in fig. 10 and 11, each of the moving contact sets 32 includes two moving contacts 320 disposed at an interval; as shown in fig. 4, when the second fixed contact 21 is closed with the movable contact group 32, the second fixed contact 212 is interposed between two movable contacts 320 of the movable contact group 32. Further, the movable contact mechanism 3 includes two movable contact groups 32 arranged side by side at intervals; as shown in fig. 4 and 7, the second fixed contact 21 includes two second fixed contacts 212 spaced side by side on a second fixed contact plate 211, and respectively engaged with the two movable contact groups 32. In the contact mechanism, the second fixed contact 21 is matched with the plurality of movable contact groups 32 through the plurality of second movable contacts 212, which is beneficial to improving the conductivity of the contact mechanism, so that the contact mechanism can bear larger current.

Preferably, as shown in fig. 2 to 7, the switching device further includes a heat dissipation plate set 5, a heat dissipation hole matched with the heat dissipation plate set 5 is formed in the device housing 1, the heat dissipation plate set 5 and the first fixed contact 20 are arranged at one end of the switching device side by side, the second fixed contact 21 and the arc extinguish chamber 4 are arranged at the other end of the switching device side by side, and the movable contact mechanism 3 is arranged in the middle of the switching device and located between the first fixed contact 20 and the second fixed contact 21. The radiating fin group 5 is matched with the radiating holes, so that the temperature rise in the switch device is reduced.

Preferably, as shown in fig. 1 to 7, the device housing 1 is further provided with a set of rails, and a pair of side walls of the device housing 1 are provided with a set of rails respectively, and each set of rails comprises two oppositely arranged rails for mounting the switchgear to a rail bracket (e.g. a rail bracket in a distribution box or a control cabinet).

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 switching device comprises a device shell (1), a moving contact mechanism (3), a static contact group and an arc extinguish chamber (4), wherein the moving contact mechanism, the static contact group and the arc extinguish chamber are arranged in the device shell (1), the static contact group comprises a second static contact (21), and the arc extinguish chamber (4) is arranged on one side of the second static contact (21); the method is characterized in that: the moving contact mechanism (3) comprises a contact support (30) which is arranged in the device shell (1) in a pivoting mode, a moving contact group (32) and an arc blocking piece (31), the arc blocking piece (31) is arranged on the contact support (30) and located between the contact support (30) and the arc extinguishing chamber (4), the arc blocking piece (31) comprises an arc blocking piece side wall (310), the moving contact group (32) is arranged on the contact support (30), and one end of the moving contact group (32) penetrates through the arc blocking piece (31) to be matched with the second fixed contact (21); after the moving contact group (32) is disconnected with the second fixed contact (21), the arc blocking piece side wall (310) is opposite to the inlet of the arc extinguishing chamber (4).

2. The switching device according to claim 1, wherein: a channel with one end of the movable contact group (32) swinging is arranged between the contact support (30) and the arc extinguish chamber (4), and after the movable contact group (32) is disconnected with the second fixed contact (21), the arc blocking piece side wall (310) of the arc blocking piece (31) shields the channel.

3. The switching device according to claim 2, wherein: the device shell (1) is provided with a separation structure between a contact support (30) and an arc extinguishing chamber (4), an arc blocking piece (31) is positioned on one side of the separation structure far away from the arc extinguishing chamber (4), and a channel for swinging a movable contact group (32) is formed on the separation structure.

4. A switching device according to claim 3, characterized in that: the arc blocking part side wall (310) is an arc-shaped side wall, and the side wall of the separating structure close to one side of the contact support (30) is an arc-shaped separating side wall which is connected with the arc blocking part side wall (310).

5. The switching device according to claim 4, wherein: the separation structure comprises two first blocking ribs (12) which are arranged on the inner side of the side wall of the device shell (1) in a protruding mode in the thickness direction of the device shell (1), and a second blocking rib (11) which is arranged on the inner side of the bottom wall of the device shell (1) in a protruding mode, wherein the first blocking rib (12) and the second blocking rib (11) are enclosed to form a channel, a second static contact (21) is arranged on one first blocking rib (12), one end of the second blocking rib (11) is connected with the other first blocking rib (12), the second blocking rib (11) extends to the position of the second static contact (21), and an arc blocking part side wall (310) swings between the two first blocking ribs (12).

6. The switching device according to claim 1, wherein: the contact support (30) is of a cylindrical structure, a moving contact channel (302) extending along the radial direction of the contact support (30) is arranged in the middle of the contact support, and the moving contact group (32) is inserted into the moving contact channel (302).

7. The switching device according to claim 6, wherein: the arc blocking piece (31) protrudes out of one side of the contact support (30) and is a gas production type arc blocking piece made of a gas production material, and the arc blocking piece (31) and the contact support (30) are installed in a clamping mode.

8. The switching device according to claim 1, wherein: the arc blocking piece (31) comprises an arc blocking piece hole structure for the movable contact group (32) to pass through; the arc blocking piece hole structure is an integral hole for the moving contact group (32) to pass through; or the arc blocking piece hole structure comprises a plurality of moving contact holes (312) which are arranged side by side at intervals, and a plurality of moving contacts (320) of the moving contact group (32) respectively penetrate through the arc blocking piece (31) through one moving contact hole (312).

9. The switching device according to claim 1, wherein: the static contact group also comprises a first static contact (20), the first static contact (20) and a second static contact (21) are respectively arranged at two sides of the moving contact mechanism (3), and the other end of the moving contact group (32) is rotationally connected with one end of the first static contact (20); the contact support (30) coincides with the axis of rotation of the movable contact group (32).

10. A rotary switch, characterized in that it comprises at least one switching device according to any one of claims 1 to 9; the rotary switch also comprises an operating mechanism (1A) in driving fit with the switch device, and the operating mechanism (1A) drives the moving contact mechanism (3) to rotate so as to close or open the moving contact group (32) and the second fixed contact (21).

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