Magnetic enhancement structure of switching device and switching device
By introducing a magnetic reinforcement structure into the switching device, and using the magnet group and exhaust structure to suck and discharge the arc, the problem of difficulty in extinguishing the arc in the high-voltage DC air-type switching device is solved, and the safety and reliability of the device are improved.
Patent Information
- Application Number
- CN202323341252.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-07
- Publication Date
- 2025-01-07
- Estimated Expiration
- 2033-12-07
AI Technical Summary
High voltage DC air-type switch devices are prone to arcing during opening and closing, and arcing is difficult to enter the arc extinguishing chamber, which may damage the dynamic and static contacts and break through the switch device housing, resulting in accidents.
A magnetic reinforcement structure of a switching device is designed, including a conductive module and a magnetic reinforcement module. The magnetic reinforcement module is close to the air outlet side of the arc extinguishing chamber, and uses multiple magnet groups and exhaust structures to suck the arc into the arc extinguishing chamber and passes the air exhaust. The holes and pressure relief gaps efficiently discharge high-temperature and high-pressure gases to improve the arc extinguishing effect.
Effectively sucking and extinguishing the arc improves the safety and reliability of the switching device, prevents the arc from causing damage to the dynamic and static contacts and housing, and reduces the risk of accidents.
Smart Images
Figure CN222320025U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of low-voltage electrical appliances, in particular to a magnetic enhancement structure of a switch device and the switch device. Background Art
[0002] There are two types of existing switchgears: one is a vacuum type, in which the moving and static contacts are located in an inert gas atmosphere, which can effectively prevent arcs from being generated; the other is an air type, in which the moving and static contacts are in an air environment, and an arc extinguishing chamber is provided in the switchgear to extinguish the arcs generated by the moving and static contacts during the opening and closing process. For high-voltage DC air-type switchgears, arcs may be generated during the opening and closing process, and the arcs are not easy to enter the arc extinguishing chamber, which may easily damage the moving and static contacts, and may also break through the housing of the switchgear, causing accidents. Summary of the invention
[0003] The utility model aims to overcome at least one defect of the prior art and provide a magnetic enhancement structure of a switch device and a switch device.
[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:
[0005] The magnetic enhancement structure of the switching device includes a conductive module, which includes at least one conductive unit. The conductive unit includes an arc extinguishing chamber, a matching moving contact and a static contact. One side of the arc extinguishing chamber is an arc-entry side close to the moving contact and the static contact, and the other side is an air outlet side away from the moving contact and the static contact. It also includes a magnetic enhancement module corresponding to the conductive unit, which is close to the air outlet side of the arc extinguishing chamber and away from the arc-entry side. The magnetic enhancement module includes multiple magnet groups, and the magnet groups include at least one magnet.
[0006] Optionally, the conductive module also includes a conductive module shell, the conductive unit is loaded into the conductive module shell, and the conductive module shell is provided with an exhaust structure corresponding to the outlet side of the arc extinguishing chamber, and the magnetic enhancement module also includes a bracket, the bracket is arranged side by side on one side of the conductive module shell, the magnet group is arranged on the bracket, and there is a gap corresponding to the exhaust structure between two adjacent magnet groups.
[0007] Optionally, the magnet group is plugged and fixed to the bracket, both ends of the magnet group have plug-in parts, and the bracket is provided with a slot that is snap-fitted with the plug-in part.
[0008] Optionally, a pressure relief gap is left between the magnet group and the exhaust structure.
[0009] Optionally, the magnetic enhancement module further includes a plurality of protective covers for wrapping the plurality of magnet groups, and the protective covers are provided with accommodating cavities corresponding to the magnets.
[0010] Optionally, the multiple magnet groups are arranged in parallel and spaced apart, and the N poles of two adjacent magnet groups are arranged opposite to each other.
[0011] Optionally, the multiple magnet groups include two first magnet groups located on both sides and at least one second magnet group located in the middle, the first magnet group having a magnet, the S pole of the magnet of the first magnet group facing outward and the N pole facing the second magnet group, the second magnet group having two magnets arranged at intervals, the S poles of the two magnets of the second magnet group being arranged opposite to each other and the N poles facing outward.
[0012] Optionally, the multiple magnet groups are arranged horizontally and sequentially in the vertical direction.
[0013] Optionally, the exhaust structure of the conductive module includes a plurality of exhaust holes, and the plurality of exhaust holes are arranged in a plurality of rows, wherein the exhaust holes in a row correspond to the gaps between two adjacent magnet groups.
[0014] Optionally, the multiple magnet groups are arranged vertically and sequentially in the horizontal direction.
[0015] Optionally, the exhaust structure of the conductive module includes a plurality of exhaust holes, which are arranged in multiple rows between two first magnet groups located on both sides of the multiple magnet groups, wherein the gap between two adjacent rows of exhaust holes corresponds to a second magnet group located in the middle of the multiple magnet groups.
[0016] Optionally, the magnet is a permanent magnet.
[0017] Optionally, the arc extinguishing chamber includes a plurality of arc extinguishing grids, and the plurality of arc extinguishing grids are arranged in sequence in a vertical direction.
[0018] Optionally, the switch device is a vehicle switch device and also includes an electromagnetic module. The electromagnetic module drives the moving contact and the static contact of the conductive module to open or close through a transmission rod to realize the opening and closing of the switch device. The conductive module also includes a conductive module shell. The conductive unit is installed in the conductive module shell. The electromagnetic module includes a coil, a static iron core, and a moving iron core. The transmission rod is linked to the moving iron core and penetrates into the conductive module shell to connect with the moving contact. When the moving iron core moves under the action of the electromagnetic force of the coil, it drives the moving contact to move and cooperate with the static contact through the transmission rod.
[0019] Optionally, the conductive module has two symmetrical conductive units, a static contact is provided on the bottom surface of the static contacts of the two conductive units, and the moving contacts of the two conductive units are in a bridge-shaped structure, one end is integrally connected, and a moving contact is provided on the top surface of each of the other ends, which is used to correspond to the static contacts of the static contacts of the two conductive units.
[0020] A switch device, comprising the magnetic enhancement structure of the switch device of any one of the above technical solutions.
[0021] The magnetic enhancement structure of the switch device and the switch device of the utility model, the magnetic enhancement module is used to absorb the arc into the arc extinguishing chamber of the conductive unit to improve the arc extinguishing effect, and can be applied to high-voltage DC air-type switch devices.
[0022] In addition, the conductive module of this embodiment is provided with a conductive module shell so that the conductive unit can be assembled into a module, and multiple conductive units can be arranged to be assembled into one module. The magnetic enhancement module can be installed as a functional accessory at the exhaust structure of the conductive module shell to realize magnetic enhancement of the conductive unit. BRIEF DESCRIPTION OF THE DRAWINGS
[0023] Figure 1 It is a three-dimensional diagram of the magnetic enhancement structure of the switch device of the first embodiment of the utility model;
[0024] Figure 2 is a cross-sectional view of a magnetic enhancement structure of a switch device according to a first embodiment of the utility model;
[0025] Figure 3 This is a schematic diagram of a magnetic enhancement module in Embodiment 1 of the present utility model;
[0026] Figure 4 This is another schematic diagram of the magnetic enhancement module of the first embodiment of the utility model;
[0027] Figure 5 This is a schematic diagram of the magnetic circuit of the magnetic enhancement module of the first embodiment of the utility model;
[0028] Figure 6 is a cross-sectional view of a magnetic enhancement module of Embodiment 2 of the present utility model;
[0029] Figure 7 It is a cross-sectional view of the magnetic enhancement module and the conductive module of the second embodiment of the utility model;
[0030] Figure 8 This utility model Figure 7 A magnified view of the local structure in
[0031] Magnetic enhancement module 100; first magnet group 101; second magnet group 102; magnet 110; plug-in part 120; protective cover 130; bracket 140; slot 141; side plate 142; crossbeam 143; pressure relief gap 150; conductive module 200; conductive module housing 210; exhaust hole 211; arc extinguishing chamber 220; static contact 230; static contact 231; moving contact 240; moving contact 241; electromagnetic module 300; coil 310; static iron core 320; moving iron core 330; transmission rod 400. DETAILED DESCRIPTION
[0032] The following embodiments are combined with the accompanying drawings to further illustrate the magnetic enhancement structure of the switch device and the specific implementation of the switch device of the present invention. The magnetic enhancement structure of the switch device and the switch device of the present invention are not limited to the description of the following embodiments.
[0033] like Figure 1-2 As shown, the switch device of this embodiment includes a magnetic enhancement structure of the switch device. The magnetic enhancement structure of the switch device of this embodiment includes a conductive module 200, the conductive module 200 includes at least one conductive unit, the conductive unit includes an arc extinguishing chamber 220, a matching moving contact 240 and a stationary contact 230, the arc extinguishing chamber 220 includes a plurality of arc extinguishing grids, the plurality of arc extinguishing grids are arranged in sequence in the vertical direction, one side of the arc extinguishing chamber 220 is an arc entry side close to the moving contact 240 and the stationary contact 230, and the other side is a gas outlet side away from the moving contact 240 and the stationary contact 230. An arc is generated during the opening and closing process of the moving contact 240 and the stationary contact 230. The arc enters the arc extinguishing chamber 220 from the arc entry side and is extinguished to generate high-temperature and high-pressure gas, which is discharged from the gas outlet side. In particular, the magnetic enhancement structure of the switch device also includes a magnetic enhancement module 100 corresponding to the conductive unit, the magnetic enhancement module 100 is close to the gas outlet side of the arc extinguishing chamber 220 and away from the arc entry side, as shown in FIG. Figure 3-8 As shown, the magnetic enhancement module 100 includes a plurality of magnet groups, and the magnet group includes at least one magnet 110. The magnetic enhancement structure and switch device of the switch device of this embodiment, the magnetic enhancement module 100 is used to absorb the arc into the arc extinguishing chamber 220 of the conductive unit to improve the arc extinguishing effect, and can be applied to high-voltage DC air-type switch devices. The switch device of this embodiment can be a contactor, a circuit breaker, a contactor-type circuit breaker, etc. The magnet 110 of this embodiment is a permanent magnet. Of course, the magnet 110 can also be an electromagnet, etc.
[0034] like Figure 2 As shown, the conductive module 200 of this embodiment further includes a conductive module housing 210, the conductive unit is installed in the conductive module housing 210, and the conductive module housing 210 is provided with an exhaust structure corresponding to the gas outlet side of the arc extinguishing chamber 220. Figure 3-4 or Figure 6-7 As shown, the magnetic enhancement module 100 of this embodiment further includes a bracket 140, which is arranged side by side on one side of the conductive module housing 210, and the magnet group is arranged on the bracket 140, and there is a gap corresponding to the exhaust structure between two adjacent magnet groups. The high-temperature and high-pressure gas generated after the arc enters the arc extinguishing chamber 220 and is extinguished can be discharged from the gap between the two adjacent magnet groups after being discharged from the exhaust structure. Further, as Figure 2As shown, a pressure relief gap 150 is left between the magnet group and the exhaust structure. When the electric arc generates a large amount of gas in a short time, the high-pressure gas can be discharged from the exhaust structure directly from the pressure relief gap 150 without passing through the magnet group to complete the pressure relief. The conductive module 200 of this embodiment is provided with a conductive module housing 210 so that the conductive unit can be assembled into a module, and multiple conductive units can be arranged to be assembled into one module. The magnetic enhancement module 100 can be installed as a functional accessory at the exhaust structure of the conductive module housing 210 to achieve magnetic enhancement of the conductive unit. Of course, as other embodiments, the conductive module housing 210 and the bracket 140 can also be omitted, and the magnetic enhancement module 100 can be directly arranged side by side on the gas outlet side of the arc extinguishing chamber 220.
[0035] like Figure 4 or Figure 6 As shown, the magnet group of this embodiment is plugged and fixed with the bracket 140. The two ends of the magnet group have plug-in parts 120. The bracket 140 is provided with a slot 141 that is snap-fitted with the plug-in part 120. The slot 141 can be a through hole or a blind hole. The installation operation is simple and convenient, and the installation is firm. Of course, as other embodiments, the magnet group and the bracket 140 can also be an integrally formed structure such as Figure 3 shown.
[0036] like Figure 5 or Figure 8 As shown, the magnetic enhancement module 100 of this embodiment also includes a plurality of protective covers 130 for wrapping a plurality of magnet groups, and the protective covers 130 are provided with a receiving cavity corresponding to the magnet 110. The protective cover 130 protects the magnet group from arc gas, and the protective cover 130 has a receiving cavity corresponding to the magnet 110 one by one to prevent the repulsive force between the magnets 110 in the magnet group from being difficult to install. Optionally, the protective cover 130 is made of ceramic to prevent the magnet 110 from directly contacting the arc gas. The magnet group is wrapped and protected by the protective cover 130 at least at a position that may be exposed to the arc gas. Preferably, the protective cover 130 of this embodiment is a fully wrapped structure of the magnet group. In addition, the protective cover 130 of this embodiment can be integrally formed and wrapped on the magnet group, or can be connected by an upper and lower shell, or can be connected by a front and rear shell.
[0037] like Figure 3-5 or Figure 6-8As shown, the multiple magnet groups of this embodiment are arranged in parallel and spaced apart, and the N poles of two adjacent magnet groups are arranged oppositely. This embodiment adopts the N poles of two adjacent magnet groups to be arranged oppositely, and the Lorentz force generated by the magnetic field makes the charged gas (usually mostly negatively charged electrons) have a tendency to be ejected from the center line of the two adjacent magnet groups, which can suck the arc into the arc extinguishing chamber 220, and guide the arc gas to be discharged from the gas outlet side in an orderly manner and then continue to be discharged from the gap between the magnet groups, avoiding air flow turbulence. Of course, as other embodiments, the S poles of two adjacent magnet groups can also be arranged oppositely. The multiple magnet groups of this embodiment include two first magnet groups 101 located on both sides and at least one second magnet group 102 located in the middle, the first magnet group 101 has a magnet 110, the protective cover 130 of the first magnet group 101 has a receiving cavity, the S pole of the magnet 110 of the first magnet group 101 faces outward and the N pole faces the second magnet group 102, the second magnet group 102 has two magnets 110 arranged at intervals, the protective cover 130 of the second magnet group 102 has two receiving cavities, the S poles of the two magnets 110 of the second magnet group 102 are arranged oppositely and the N pole faces outward. The first magnet group 101 of this embodiment adopts a sheet structure of a single magnet 110, and the second magnet group 102 adopts two magnets 110 with opposite S poles to form a ring-like structure, which enhances the magnetic field strength and improves the arc extinguishing effect. Of course, as other embodiments, it can also be a U-shaped, bar-shaped or other structure.
[0038] like Figure 3-5 As shown, the arrangement structure of the magnet group in the magnetic enhancement module of the first embodiment, the multiple magnet groups of this embodiment are arranged horizontally and arranged in sequence in the vertical direction. The bracket 140 of this embodiment includes two side plates 142, and the magnet group is vertically connected between the two side plates 142. The plug-in portion 120 of the magnet group of this embodiment is a protrusion arranged on both ends of the magnet group, and the slot 141 of the bracket 140 of this embodiment is a through-hole structure arranged on the side plate 142. One side of the side plate 142 is attached to the side where the exhaust structure of the conductive module housing 210 is located, and protrudes from the side edge of the magnet group so as to leave the pressure relief gap 150. The exhaust structure of the conductive module 200 of this embodiment includes a plurality of exhaust holes 211, and the plurality of exhaust holes 211 are arranged in multiple rows, wherein the exhaust holes 211 in a row correspond to the gap between two adjacent magnet groups. The magnetic enhancement module of this embodiment has a simple structure, and the direction of the connection between the S pole and the N pole of the magnet 110 is the vertical direction.
[0039] like Figure 6-8As shown, the arrangement structure of the magnet group in the magnetic enhancement module of the second embodiment, the multiple magnet groups of this embodiment are arranged vertically and arranged in sequence in the horizontal direction. The bracket 140 of this embodiment includes two side panels 142 and two crossbeams 143, the two crossbeams 143 are respectively vertically connected between the two ends of the two side panels 142, the magnet group is vertically connected between the two crossbeams 143, and is parallel to the side panels 142. The plug-in portion 120 of the magnet group of this implementation is the two ends of the magnet group, and the slot 141 of the bracket 140 of this embodiment is a groove structure arranged on the crossbeam 143. One side of the side panel 142 is attached to the side where the exhaust structure of the conductive module housing 210 is located, and protrudes from the side edge of the magnet group and the side edge of the crossbeam 143, thereby leaving the pressure relief gap 150. The exhaust structure of the conductive module 200 of this embodiment includes a plurality of exhaust holes 211, which are arranged in multiple rows between two first magnet groups 101 located on both sides of the plurality of magnet groups, wherein the gap between two adjacent rows of exhaust holes 211 corresponds to the second magnet group 102 located in the middle of the plurality of magnet groups. The magnetic enhancement module of this embodiment has a stable structure, and the direction of the line connecting the S pole and the N pole of the magnet 110 is horizontal.
[0040] like Figure 1 As shown, the switch device of this embodiment is a vehicle switch device, and its structure is similar to the combination of a contactor and a circuit breaker, and also includes an electromagnetic module 300. The electromagnetic module 300 drives the moving contact 240 and the static contact 230 of the conductive module 200 to open or close through the transmission rod 400 to realize the opening and closing of the switch device. The electromagnetic module 300 includes a coil 310, a static iron core 320, and a moving iron core 330. The transmission rod is linked to the moving iron core 330 and penetrates into the conductive module housing 210 to connect with the moving contact 240. When the moving iron core 330 moves under the action of the electromagnetic force of the coil 310, it drives the moving contact 240 to move through the transmission rod 400 to cooperate with the static contact 230.
[0041] like Figure 1-2As shown, the conductive module 200 of this embodiment has two conductive units that are symmetrical on the left and right. Accordingly, the magnetic enhancement structure of the switch device of this embodiment has two magnetic enhancement modules 100 that are symmetrical on the left and right. A static contact 231 is provided on the bottom surface of the static contacts 230 of the two conductive units. The movable contacts 240 of the two conductive units are in a bridge-shaped structure, one end of which is integrally connected as a support portion, for example, can be placed on a contact support, and the other end of the top surface is respectively provided with a movable contact 241 for correspondingly cooperating with the static contacts 231 of the static contacts 230 of the two conductive units. When the coil 310 is energized, the moving iron core 330 and the static iron core 320 are attracted, the moving iron core 330 moves upward, and the transmission rod 400 moves upward synchronously, driving the moving contact 240 to move upward and close with the static contact 230, thereby closing the switch device; when the coil 310 is de-energized, the moving iron core 330 and the static iron core 320 are repelled, the moving iron core 330 moves downward, and the transmission rod 400 moves downward synchronously, driving the moving contact 240 to move downward and disconnect from the static contact 230, thereby opening the switch device.
[0042] It should be noted that in the description of the present invention, the terms "upper", "lower", "left", "right", "inner", "outer", etc. indicate directions or positional relationships based on directions or positional relationships shown in the drawings, or directions or positional relationships that are usually placed when in use, and are only for the convenience of description, rather than indicating that the device or element referred to must have a specific direction, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish descriptions, and cannot be understood as indicating relative importance.
[0043] The above contents are further detailed descriptions of the present invention in combination with specific preferred implementations, and the specific implementation of the present invention cannot be considered to be limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, which should be regarded as falling within the protection scope of the present invention.
Claims
1. A magnetic enhancement structure of a switch device, comprising a conductive module (200), the conductive module (200) comprising at least one conductive unit, the conductive unit comprising an arc extinguishing chamber (220), a matching moving contact (240) and a stationary contact (230), one side of the arc extinguishing chamber (220) being an arc entry side close to the moving contact (240) and the stationary contact (230), and the other side being an air outlet side away from the moving contact (240) and the stationary contact (230), characterized in that: It also includes a magnetic enhancement module (100) corresponding to the conductive unit, the magnetic enhancement module (100) being close to the gas outlet side of the arc extinguishing chamber (220) and away from the arc inlet side, the magnetic enhancement module (100) comprising a plurality of magnet groups, the magnet groups comprising at least one magnet (110).
2. The magnetic enhancement structure of the switch device according to claim 1, characterized in that: The conductive module (200) further comprises a conductive module housing (210), the conductive unit is installed in the conductive module housing (210), and the conductive module housing (210) is provided with an exhaust structure corresponding to the gas outlet side of the arc extinguishing chamber (220), and the magnetic enhancement module (100) further comprises a bracket (140), the bracket (140) is arranged side by side on one side of the conductive module housing (210), the magnet group is arranged on the bracket (140), and there is a gap corresponding to the exhaust structure between two adjacent magnet groups.
3. The magnetic enhancement structure of the switch device according to claim 2, characterized in that: The magnet group is plugged and fixed to the bracket (140), both ends of the magnet group are provided with plug-in parts (120), and the bracket (140) is provided with a slot (141) that is snap-fitted with the plug-in part (120).
4. The magnetic enhancement structure of the switch device according to claim 2, characterized in that: A pressure relief gap (150) is left between the magnet group and the exhaust structure.
5. The magnetic enhancement structure of the switch device according to claim 1, characterized in that: The magnetic enhancement module (100) further comprises a plurality of protective covers (130) for wrapping a plurality of magnet groups, wherein the protective covers (130) are provided with accommodating cavities corresponding to the magnets (110).
6. The magnetic enhancement structure of the switch device according to any one of claims 1 to 5, characterized in that: The plurality of magnet groups are arranged in parallel and spaced apart from each other, and the N poles of two adjacent magnet groups are arranged opposite to each other.
7. The magnetic enhancement structure of the switch device according to claim 6, characterized in that: The plurality of magnet groups include two first magnet groups (101) located on both sides and at least one second magnet group (102) located in the middle, the first magnet group (101) having a magnet (110), the S pole of the magnet (110) of the first magnet group (101) facing outwards and the N pole facing the second magnet group (102), the second magnet group (102) having two magnets (110) arranged at intervals, the S poles of the two magnets (110) of the second magnet group (102) facing oppositely and the N poles facing outwards.
8. The magnetic enhancement structure of the switch device according to claim 6, characterized in that: The multiple magnet groups are arranged horizontally and sequentially in the vertical direction.
9. The magnetic enhancement structure of the switch device according to claim 8, characterized in that: The exhaust structure of the conductive module (200) comprises a plurality of exhaust holes (211), wherein the plurality of exhaust holes (211) are arranged in a plurality of rows, wherein the exhaust holes (211) in a row correspond to the gaps between two adjacent magnet groups.
10. The magnetic enhancement structure of the switch device according to claim 6, characterized in that: The multiple magnet groups are arranged vertically and sequentially in the horizontal direction.
11. The magnetic enhancement structure of the switch device according to claim 10, characterized in that: The exhaust structure of the conductive module (200) comprises a plurality of exhaust holes (211), wherein the plurality of exhaust holes (211) are arranged in a plurality of rows between two first magnet groups (101) located on both sides of the plurality of magnet groups, wherein a gap between two adjacent rows of exhaust holes (211) corresponds to a second magnet group (102) located in the middle of the plurality of magnet groups.
12. The magnetic enhancement structure of the switch device according to claim 1, characterized in that: The magnet (110) is a permanent magnet.
13. The magnetic enhancement structure of the switch device according to claim 1, characterized in that: The arc extinguishing chamber (220) comprises a plurality of arc extinguishing grids, and the plurality of arc extinguishing grids are arranged in sequence in a vertical direction.
14. The magnetic enhancement structure of the switch device according to claim 1, characterized in that: The switch device is a vehicle switch device, and further comprises an electromagnetic module (300). The electromagnetic module (300) drives the movable contact (240) and the stationary contact (230) of the conductive module (200) to open or close through a transmission rod (400), thereby realizing the opening and closing of the switch device. The conductive module (200) further comprises a conductive module housing (210). The conductive unit is installed in the conductive module housing (210). The electromagnetic module (300) comprises a coil (310), a stationary iron core (320), and a movable iron core (330). The transmission rod is linked to the movable iron core (330) and penetrates into the conductive module housing (210) to be connected with the movable contact (240). When the movable iron core (330) moves under the electromagnetic force of the coil (310), the transmission rod (400) drives the movable contact (240) to move and cooperate with the stationary contact (230).
15. The magnetic enhancement structure of the switch device according to claim 1, characterized in that: The conductive module (200) has two symmetrical conductive units, a static contact point (231) is provided on the bottom surface of the static contacts (230) of the two conductive units, and the movable contacts (240) of the two conductive units are in a bridge-shaped structure, one end of which is integrally connected, and the other end of which is provided with a movable contact point (241) on the top surface, respectively, for correspondingly cooperating with the static contacts (231) of the static contacts (230) of the two conductive units.
16. A switch device, characterized in that: A magnetic enhancement structure comprising a switching device according to any one of claims 1-15.