CN220963077U - Contact device and switchgear - Google Patents

Abstract

The application discloses a contact device and a switch device, comprising a bracket which is arranged in a sliding way along a direction; three first contact bridges arranged on the bracket and moving along with the bracket; three second contact bridges arranged beside the bracket to be connected/disconnected with the first contact bridges when the first contact bridges move; a first contact bridge biasing member for providing a contact pressure when the first contact bridge contacts the second contact bridge; the three first contact bridges are a first contact bridge I, a first contact bridge II and a first contact bridge III respectively, and the first contact bridge I and the first contact bridge II realize short circuit or are integrated through a hard conductor; the first contact bridge III and the first contact bridge I and/or the first contact bridge II are/is short-circuited through a flexible conductor; the application has the characteristics of simpler structure and fewer parts.

Description

Contact device and switchgear

Technical Field

The application relates to the field of low-voltage switch electricity, in particular to a contact device of a switch device.

Background

In the fields of motor starting, elevator starting, etc., star connection is often required.

Taking a star-seal contactor as an example, for example, CN209675211U discloses an ac star-seal contactor, which includes three normally closed main contacts that form a star-seal connection through a short-circuit piece, as shown in fig. 13, the star-seal contactor includes three fixed contacts located on a first side of a bracket, three fixed contacts located on a second side of the bracket (each moving contact has two moving contacts and is matched with two fixed contacts), the three fixed contacts located on the second side of the bracket are shorted through a short-circuit piece, and when the moving contacts are contacted with the fixed contacts, the star-seal connection is formed.

In the star-delta starting field, the short circuit mode is similar to that of the star-delta sealing contactor, and a plurality of conductors are needed to realize the short circuit, so that the structure is simplified, and the cost is reduced.

Disclosure of Invention

In view of the above, the present application aims to overcome the defects in the prior art, and aims to provide a contact device and a switching device, which have the advantages of simplifying the product structure, reducing the cost, and the like.

The application provides a contact device, which comprises a bracket arranged in a sliding way along a direction; three first contact bridges arranged on the bracket and moving along with the bracket; three second contact bridges arranged beside the bracket to be connected/disconnected with the first contact bridges when the first contact bridges move; a first contact bridge biasing member for providing a contact pressure when the first contact bridge contacts the second contact bridge; the three first contact bridges are a first contact bridge I, a first contact bridge II and a first contact bridge III respectively, and the first contact bridge I and the first contact bridge II realize short circuit or are integrated through a hard conductor; the first contact bridge III and the first contact bridge I and/or the first contact bridge II are/is short-circuited through a flexible conductor.

Firstly, adopt above-mentioned structure, utilize stereoplasm conductor or an organic whole structure to realize first contact bridge I and the short circuit of first contact bridge II, then utilize the flexible conductor to realize first contact bridge III and the short circuit between them, finally make all first contact bridges form the short circuit, realize star connection, compare in prior art's short circuit mode, such structure can save more than 3 electrically conductive pieces at least, greatly reduced the cost. Secondly, the first contact bridge I and the first contact bridge II are in short circuit through a hard conductor or an integrated piece, so that the first contact bridge I and the first contact bridge II can be ensured to have stronger synchronism; the first contact bridge III is connected by adopting a flexible conductor, so that the first contact bridge III can move independently, and the first contact bridge I and the first contact bridge II are not influenced and are not influenced by the first contact bridge I and the first contact bridge II.

In some embodiments of the application, the flexible conductor is a wire or a soft connection or a soft conductive braid, and the flexible conductor is fixed by welding; and/or the hard conductor is a conductive bar, and the conductive bar is welded or riveted or fastened by screws or lapped with the first contact bridge I and the first contact bridge II.

By adopting the structure, the flexible conductor is a wire or soft connection or soft conductive braid, and the flexible conductor is very convenient to fix by welding and is beneficial to processing. The hard conductor is a conductive bar, and is fixed by welding or riveting or fastened by screws or lapped, and the method has the characteristics of convenient processing and convenient assembly.

In some embodiments of the application, the first contact bridge i is disposed adjacent to the first contact bridge ii, and the first contact bridge iii is disposed beside the first contact bridge i or the first contact bridge ii; or, the first contact bridge III is arranged between the first contact bridge I and the first contact bridge II.

By adopting the structure, the relation among the three first contact bridges can be set arbitrarily, and no special setting rule is needed.

In some embodiments of the present application, three first contact bridge installation spaces are provided on the bracket, the top of the first contact bridge installation space is in an open structure, and the contact positions of the first contact bridge and the second contact bridge are in the range of the open structure; or, be provided with big installation space and little installation space on the bracket, big installation space's size is greater than little installation space's size, and big installation space is used for placing first bridge I and the first bridge II that touches, and little installation space is used for placing first bridge III that touches, and big, little installation space's top is open structure, and first bridge I, first bridge II that touches, first bridge III that touches and the second touch the contact position of bridge and be in the scope of corresponding open structure.

By adopting the structure, the first contact bridge installation space, the large installation space and the small installation space of the open structure are adopted, and the contact positions of the first contact bridge and the second contact bridge are in the range of the corresponding open structure, so that the stress point of the first contact bridge can be ensured to be closer to the bracket, and the attenuation of force is reduced.

In some embodiments of the present application, three first contact bridge installation spaces are provided on the bracket, the top of the first contact bridge installation space is in an open structure, and the contact positions of the first contact bridge and the second contact bridge are in the range of the open structure; the width dimension of the bottom surface of the first contact bridge installation space is D, and the dimension of the first contact bridge does not exceed D.

By adopting the design of the open structure, the size of the first contact bridge does not exceed D, so that the stress of the first contact bridge is very close to the bracket, and the attenuation of the force is reduced.

In some embodiments of the present application, the cross-sectional shape of the first contact bridge is U-shaped, and an opening of the U-shape is disposed toward a direction in which the bracket is located.

In some embodiments of the application, a guide groove is formed at the side wall position of the bracket, and the length direction of the guide groove is parallel to the sliding direction of the bracket; the first contact bridge is provided with a bent guide part, and the guide part is arranged in the guide groove in a sliding manner along the length direction of the guide groove.

By adopting the design of the guide structure, the first contact bridge can be guided in the moving process, and the first contact bridge is ensured to move stably.

In some embodiments of the present application, three first contact bridge installation spaces are provided on the bracket, and two ends of the first contact bridge penetrate out of the first contact bridge installation spaces to form a first end and a second end, wherein the first end is used for contacting with the second contact bridge; the shell is integrally formed with a balance piece or the balance piece is arranged in the shell, the position of the balance piece is matched with the position of the second contact bridge, and the balance piece is contacted with the second end part while the first end part is contacted with the second contact bridge.

By adopting the structure, the balance piece is arranged, so that the first contact bridge is more stable when in contact with the second contact bridge.

In some embodiments of the present application, the first contact bridge and the second contact bridge are normally closed, and are switched to an on-off state after the bracket is forced to move. Or the first contact bridge and the second contact bridge are contacted in a propping mode or in a clamping mode.

A switching device comprising an electromagnetic arrangement; the electromagnetic device is used for driving the bracket to move.

The contact device can be used for a common contactor, a star-delta starting switch or a star-sealing contactor as long as a star connection method is needed to be arranged inside.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 shows a schematic diagram of the structure of one embodiment of the contact system of example 1 of the present application;

FIG. 2 shows the schematic structure of FIG. 1 after removal of the mounting base;

FIG. 3 shows another embodiment of the contact system of example 1 of the present application

FIG. 4 shows yet another implementation of the contact system of example 1 of the present application;

Fig. 5 shows a schematic structural view of a bracket according to embodiment 1 of the present application;

FIG. 6 shows a cross-sectional view of one embodiment of the contact system of example 1 of the present application;

FIGS. 7-8 illustrate yet another implementation of the contact system of example 1 of the present application;

Fig. 9 is a schematic view showing the structure of a contactor to which the above-described contact system is applied according to embodiment 1 of the present application;

Fig. 10 is a schematic diagram showing the structure of a star-seal contactor of embodiment 1 of the present application to which the above-described contact system is applied;

FIGS. 11-12 are schematic diagrams showing the structure of an integrated star-delta start switch according to embodiment 1 of the present application using the above-described contact system;

fig. 13 shows a schematic diagram of a prior art structure.

Detailed Description

Embodiments of the present application are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the application.

In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present application and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present application.

Furthermore, the terms "primary," "secondary," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "primary" or "secondary" may include one or more such feature, either explicitly or implicitly. In the description of the present application, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

In the present application, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed, mechanically connected, electrically connected, directly connected, indirectly connected via an intervening medium, or in communication between two elements or in an interaction relationship between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present application, unless expressly stated or limited otherwise, a primary feature "up" or "down" a secondary feature may be a direct contact of the primary and secondary features, or an indirect contact of the primary and secondary features through an intervening medium. Moreover, a main feature "above", "over" and "above" a second feature may be that the main feature is directly above or obliquely above the second feature, or simply that the main feature level is higher than the second feature. The main feature "under", "below" and "beneath" the second feature may be the main feature directly under or obliquely under the second feature, or simply indicate that the main feature level is less than the second feature.

Examples

As shown in fig. 1-12, an embodiment of the present application provides a contact device comprising a mount 100, a bracket 101, three first contact bridges 102, three second contact bridges 103, and a first contact bridge bias 104.

The mounting base 100, three second contact bridges 103 are mounted on the mounting base 100. The mounting base 100 is provided with a channel for the bracket 101 to move, so that the bracket 101 can slide reciprocally along the channel.

Three first contact bridges 102 are arranged on the carrier 101, sliding together with the carrier 101, so that a connection and disconnection with three second contact bridges 103 is achieved. The number of the first contact bridge biasing members 104 is three, and the first contact bridge biasing members 104 are disposed in the bracket 101 to correspond to the three first contact bridges 102, respectively, so that a contact pressure can be provided to the first contact bridges 102 when they are in contact with the second contact bridges 103. The first contact bridge biasing member 104 may be selected from a spring plate, a torsion spring, a spring, and a disc spring.

When the bracket 101 is not stressed, the three first contact bridges 102 and the three second contact bridges 103 are normally closed, that is, when the bracket 101 is stressed and slides, the bracket is converted into an open state. Of course, in the present embodiment, the first contact bridge 102 and the second contact bridge 103 are in contact by abutting, but other ways of clamping may be used to achieve contact, for example, the first contact bridge 102 clamps the second contact bridge 103, or the first contact bridge 102 is clamped by the second contact bridge 103.

The shorting structure of the three first contact bridges 102 is as follows: the three first contact bridges 102 are a first contact bridge I102A, a first contact bridge II 102B and a first contact bridge III 102C, and the first contact bridge I102A and the first contact bridge II 102B are integrated into a whole 105B or short-circuited through a hard conductor 105A. The hard conductor 105A is a conductive strip, and the conductive strip is welded to the first contact bridge i 102A and the first contact bridge ii 102B, which may be riveted, screwed or overlapped. The first contact bridge III 102C and the first contact bridge I102A are in short circuit through the flexible conductor 105C, or the first contact bridge III 102C and the first contact bridge II 102B are in short circuit through the flexible conductor 105C, or the first contact bridge III 102C and the first contact bridge I102A and the first contact bridge II 102B are in short circuit through the flexible conductor 105C. In this embodiment, the first contact bridge iii 102C and the first contact bridge ii 102B are shorted by the flexible conductor 105C. The flexible conductor 105C is a wire, a flexible connection or a flexible conductive braid, and the flexible conductor 105C is fixed with the first contact bridge iii 102C and the first contact bridge ii 102B by welding.

In this embodiment, the first contact bridge i 102A, the first contact bridge ii 102B, and the first contact bridge iii 102C are disposed side by side in this order, that is, the first contact bridge ii 102B is disposed between the first contact bridge i 102A and the first contact bridge iii 102C. Of course, in addition to this, the first contact bridge iii 102C may also be arranged between the first contact bridge i 102A and the first contact bridge ii 102B. Alternatively, the first contact bridge I102A is in the form of a first contact bridge II 102B and a first contact bridge III 102C.

There are a number of arrangements of the first contact bridge 102 and the bracket 101, and several embodiments are described below for illustrating the structure of the first contact bridge 102.

As an embodiment, as shown in fig. 1 to 6, the cross-sectional shape of the first contact bridge 102 is U-shaped, and the opening of the U-shape is disposed toward the direction in which the bracket 101 is located. Three first contact bridge installation spaces 1011 are arranged on the bracket 101, the top of the first contact bridge installation spaces 1011 is an open structure 1012, and the contact positions of the first contact bridge 102 and the second contact bridge 103 are in the range of the open structure 1012. That is, the first contact bridge installation space 1011 is opened, and the first contact bridge 102 and the second contact bridge 103 are contacted at the opened position, so that the design can improve the contact stability of the first contact bridge and the second contact bridge and ensure the balance of the bracket 101. The first contact bridge 102 does not exceed the bottom width D of the first contact bridge installation space 1011. Of course, this embodiment may be modified appropriately, for example, the bracket 101 is provided with a large mounting space 1011a and a small mounting space 1011B, the size of the large mounting space 1011a (the large space corresponds to the mounting position of the two connected first contact bridges 102 in the above embodiment) is larger than the size of the small mounting space 1011B (corresponds to the mounting position of one first contact bridge 102), the large mounting space 1011a is used for placing the first contact bridge i 102A and the first contact bridge ii 102B, the small mounting space 1011B is used for placing the first contact bridge iii 102C, and the tops of the large and small mounting spaces 1011a and 1011B are both open structures 1012, and the contact positions of the first contact bridge i 102A, the first contact bridge ii 102B, the first contact bridge iii 102C and the second contact bridge 103 are in the range of the corresponding open structures 1012.

In order to ensure the stability of the engagement of the first contact bridge 102, the first contact bridge 102 is slidably disposed on the bracket 101, and the first contact bridge biasing member 104 abuts between the bottom surface and the first contact bridge 102 to provide a contact pressure thereto, and in this embodiment, the biasing member is a spring, although a structure having an elastic restoring force such as a torsion spring, a spring plate, or the like may be adopted instead of the spring. The first contact bridge 102 slides along the guiding structure during sliding, and in this embodiment, the limiting structure adopts a concave-convex matching structure, that is, guiding grooves 1013 are provided at two side walls on the bracket 101, the length direction of the guiding grooves 1013 is parallel to the sliding direction of the bracket 101, the first contact bridge 102 has a bent guiding portion 1021, and the guiding portion 1021 is located in the guiding grooves 1013 and can slide along the length direction of the guiding grooves 1013.

As another embodiment, as shown in fig. 7 to 8, three first contact bridge mounting spaces 1011 are provided on the bracket 101, and the first contact bridges 102 are provided in the respective corresponding first contact bridge mounting spaces 1011 and have both ends beyond the bracket 101 to form first end portions 102a and second end portions 102b, where the first end portions 102a are for contact with the second contact bridges 103. In order to ensure that the second contact bridge 103 can maintain balance as much as possible when contacting the first contact bridge 102, the mounting seat 100 is provided with a balance piece 106, the balance piece 106 is just located at the opposite side of the second contact bridge 103 (i.e. the position corresponding to the second end 102 b), and when the second contact bridge 103 contacts the first contact bridge 102, the balance piece 106 can just contact the second end 102b, so that the contact balance of the first contact bridge 102 and the second contact bridge 103 is ensured. Of course, the balance 106 may be part of the mount 100.

The contact device can be applied to all switching devices requiring star connection, such as contactors, star-sealed contactors, integrated star-delta start switches and the like. These applications are briefly exemplified below:

As a mode of application to the contactor, as shown in fig. 9, the contactor includes the above-described contact device and electromagnetic device.

The electromagnetic device comprises a magnetic yoke 201, a coil assembly 202 and an armature 203 which are sequentially arranged from bottom to top to form an electromagnet, and a reset structure is arranged between the magnetic yoke 201 and the armature 203. The return structure is a compression spring, and it is needless to say that, other than the compression spring, a torsion spring, a spring piece, or the like may be used as long as it can ensure that a return force is generated after the armature 203 moves. The bracket 101 is fixed to the armature 203, and the bracket 101 is located above the armature 203. The specific working flow is as follows: when the coil assembly 202 is electrified, the magnetic yoke 201 attracts the armature 203 to move downwards, the reset structure compresses to generate a reset force, and the first contact bridge 102 and the second contact bridge 103 are switched from a normally closed state to an open state (the initial states of the first contact bridge 102 and the second contact bridge 103 are normally closed); when the coil assembly 202 is powered off, the attractive force disappears, and the armature 203 returns to the original position under the action of the reset force of the reset structure, so that the first contact bridge 102 and the second contact bridge 103 are in a normally closed state from the disconnected state.

The contactor can be directly applied to an environment requiring star connection, such as a bulk star delta start switch, and no additional shorting is needed.

As one way of applying the contactor to the star-sealed contactor, as shown in fig. 10, the contactor includes an electromagnetic device and a second contact device (normally-open contact system) in addition to the above-described contact device.

The second contact means comprises three third contact bridges 301, three fourth contact bridges 302, three fifth contact bridges 303 and a third contact bridge bias 304. The fourth contact bridge 302 and the fifth contact bridge 303 are disposed on both sides of the bracket 101, and the third contact bridge 301 and the third contact bridge biasing member 304 are disposed in the bracket 101. With the sliding of the bracket 101, the third contact bridge 301, the fourth contact bridge 302 and the fifth contact bridge 303 can be simultaneously connected and disconnected. In the present embodiment, the states of the first contact bridge 102 and the second contact bridge 103 and the states of the third contact bridge 301, the fourth contact bridge 302, and the fifth contact bridge 303 are opposite to each other, so that a mechanical interlock is formed. The three fourth contact bridges 302 are respectively electrically connected to a three-phase power supply, and the three fifth contact bridges 303 are respectively electrically connected to three-phase wires of a load, so that an angular connection is formed when the third contact bridge 301 is connected to the fourth contact bridge 302 and the fifth contact bridge 303.

The electromagnetic device comprises a magnetic yoke 201, a coil assembly 202 and an armature 203 which are sequentially arranged from bottom to top to form an electromagnet, and a reset structure is arranged between the magnetic yoke 201 and the armature 203. The return structure is a compression spring, and it is needless to say that, other than the compression spring, a torsion spring, a spring piece, or the like may be used as long as it can ensure that a return force is generated after the armature 203 moves. The bracket 101 is fixed to the armature 203, and the bracket 101 is located above the armature 203. The specific working flow is as follows: when the coil assembly 202 is electrified, the magnetic yoke 201 attracts the armature 203 to move downwards, the reset structure compresses to generate a reset force, the first contact bridge 102 and the second contact bridge 103 are switched from a normally closed state to an off state (the initial states of the first contact bridge 102 and the second contact bridge 103 are normally closed), and the third contact bridge 301, the fourth contact bridge 302 and the fifth contact bridge 303 are switched to an on state; when the coil assembly 202 is powered off, the attractive force disappears, the second armature 203 returns under the action of the reset force of the second reset structure, the first contact bridge 102 and the second contact bridge 103 are changed from the disconnected state to the normally closed state, and the third contact bridge 301, the fourth contact bridge 302 and the fifth contact bridge 303 are changed to the disconnected state.

The star-sealing contactor can be directly applied to the field of elevator starting.

As an example of an integrated star-delta start switch, as shown in fig. 11-12, the structures of an electromagnetic device, a contact bridge and the like in the star-delta contact device are identical to the above-mentioned star-sealing contactor scheme, and this part will not be repeated, which is equivalent to adding a group of controllers and a main contact device on the basis of the electromagnetic device, the contact bridge structure and the like of the star-sealing contactor.

The main contact device comprises a first incoming wire wiring group 401 and a first outgoing wire wiring group 402, wherein the number of terminals in each of the first incoming wire wiring group 401 and the first outgoing wire wiring group 402 is three, and the number of terminals is consistent with the number of three-phase power supplies and motor windings. The first incoming wire connection set 401 is electrically connected with the three-phase power supply, the first outgoing wire connection set 402 is electrically connected with one end of the motor winding, and meanwhile, three terminals of the first incoming wire connection set 401 are respectively electrically connected with the three fourth contact bridges 302 through conductors 403.

The main contact device is internally provided with a main contact assembly, a main bracket for driving the main contact assembly to be connected/disconnected and a main electromagnetic device for driving the main bracket to move. The drive principle of such an internal system is identical to that of a conventional contactor and will not be described in detail here.

The controller comprises an MCU, a control program is arranged in the MCU, and the MCU is used for controlling the starting of the contact device. Specifically, the MCU is used for controlling the connection and disconnection of the main contact device and the star-angle contact device, so that the star connection method and the angle connection method are started, and the starting of the motor is realized. Of course, the control device can adopt DSP, CPU, MPU or the like besides adopting the MCU, so long as a certain control logic can be realized through a built-in program, and the starting of the contact device can be controlled.

In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present application. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.

While embodiments of the present application have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the application, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the application.

Claims (10)

1. A contact device, which comprises,

A bracket (101) which is slidably arranged along a direction;

three first contact bridges (102) arranged on the bracket (101) and moving along with the bracket;

three second contact bridges (103) arranged beside the bracket (101) for switching on/off the first contact bridges (102) when they move;

A first contact bridge biasing member (104) to provide a contact pressure when the first contact bridge (102) is in contact with the second contact bridge (103);

The method is characterized in that: the three first contact bridges (102) are respectively a first contact bridge I (102A), a first contact bridge II (102B) and a first contact bridge III (102C), and the first contact bridge I (102A) and the first contact bridge II (102B) are in short circuit through a hard conductor (105A) or the first contact bridge I (102A) and the first contact bridge II (102B) are integrated into a whole (105B); the first contact bridge III (102C) and the first contact bridge I (102A) and/or the first contact bridge II (102B) are/is shorted by a flexible conductor (105C).

2. A contact arrangement according to claim 1, characterized in that: the flexible conductor (105C) is a wire or a soft connection or a soft conductive braid, and the flexible conductor (105C) is fixed by welding; and/or the hard conductor (105A) is a conductive bar, and the conductive bar is welded or riveted or fastened or lapped with the first contact bridge I (102A) and the first contact bridge II (102B).

3. A contact arrangement according to claim 1, characterized in that: the first contact bridge I (102A) is arranged adjacent to the first contact bridge II (102B), and the first contact bridge III (102C) is arranged beside the first contact bridge I (102A) or the first contact bridge II (102B); or, the first contact bridge III (102C) is arranged between the first contact bridge I (102A) and the first contact bridge II (102B).

4. A contact arrangement according to claim 1, characterized in that: three first contact bridge installation spaces (1011) are arranged on the bracket (101), the top of each first contact bridge installation space (1011) is an open structure (1012), and the contact positions of the first contact bridge (102) and the second contact bridge (103) are in the range of the open structure (1012); or, be provided with big installation space (1011 a) and little installation space (1011B) on bracket (101), the size of big installation space (1011 a) is greater than the size of little installation space (1011B), big installation space (1011 a) is used for placing first bridge I (102A) and first bridge II (102B) that touches, little installation space (1011B) is used for placing first bridge III (102C), the top of big installation space (1011 a), little installation space (1011B) is open structure (1012), first bridge I (102A), first bridge II (102B), first bridge III (102C) and second bridge (103) contact position is in the scope of corresponding open structure (1012).

5. A contact arrangement according to claim 1, characterized in that: three first contact bridge installation spaces (1011) are arranged on the bracket (101), the top of each first contact bridge installation space (1011) is an open structure (1012), and the contact positions of the first contact bridge (102) and the second contact bridge (103) are in the range of the open structure (1012); the width dimension of the bottom surface of the first contact bridge installation space (1011) is D, and the dimension of the first contact bridge (102) does not exceed D.

6. A contact arrangement according to claim 4, wherein: the cross section of the first contact bridge (102) is U-shaped, and the opening of the U-shaped is arranged towards the direction of the bracket (101).

7. A contact arrangement according to claim 4, wherein: a guide groove (1013) is formed in the side wall position of the bracket (101), and the length direction of the guide groove (1013) is parallel to the sliding direction of the bracket (101); the first contact bridge (102) is provided with a bent guide part (1021), and the guide part (1021) is arranged in the guide groove (1013) in a sliding manner along the length direction of the guide groove (1013).

8. A contact arrangement according to claim 1, characterized in that: three first contact bridge installation spaces (1011) are formed in the bracket (101), two ends of the first contact bridge (102) penetrate through the first contact bridge installation spaces (1011) to form a first end (102 a) and a second end (102 b), and the first end (102 a) is used for being in contact with the second contact bridge (103); the balance piece (106) is matched with the second contact bridge (103) in position, and the balance piece (106) is contacted with the second end (102 b) at the same time of contacting the first end (102 a) with the second contact bridge (103).

9. A contact arrangement according to claim 1, characterized in that: the first contact bridge (102) and the second contact bridge (103) are normally closed, and are switched to an on-off state after the bracket (101) is stressed and moved; or, the first contact bridge (102) and the second contact bridge (103) are contacted in a propping way or in a clamping way.

10. A switching device comprising an electromagnetic arrangement; the method is characterized in that: a contact device according to any one of claims 1-9, said electromagnetic means being adapted to drive the movement of the carrier (101).