Switching device

Abstract

A switching device comprises an electromagnetic system and two contact systems, the electromagnetic system comprises a coil assembly, a movable iron core and a static iron core, a magnetic gap is reserved between the movable iron core and the static iron core, each contact system comprises a movable contact assembly and a static contact assembly which are matched with each other, and the electromagnetic system is arranged between the two contact systems. The movable iron core is in linkage connection with a linkage piece, the two ends of the linkage piece are in linkage connection with the movable contact assemblies of the two contact systems respectively, under driving of the electromagnetic system, the moving tracks of the movable contact assemblies, the movable iron core and the linkage piece are all parallel to the central axis of the linkage piece, and the central axis of the linkage piece is connected between the two ends of the linkage piece. According to the switching device, the two contact units are arranged on the two opposite sides of the electromagnetic system respectively, the two ends of the linkage piece can drive the moving contact assembly, meanwhile, the moving tracks of the moving contact assembly, the moving iron core and the linkage piece are all parallel to the central axis of the linkage piece, the occupied space is small, and the size of the switching device can be reduced.

Description

Technical Field

[0001] The present invention relates to the field of low-voltage electrical appliances, and in particular to a switch device. Background Art

[0002] A switch device is a device that controls the on and off of a circuit. In existing switch devices, it usually has a remote control function, that is, it controls the electromagnetic system to drive the contact system in the contact unit to perform opening and closing movements. Existing products have the following defects: First, the structure in which the electromagnetic system and the contact unit are arranged in parallel increases the overall thickness of the switch device; second, only one end of the moving iron core in the electromagnetic system is used to drive the contact system, which is not conducive to driving multiple contact units; third, when the number of contact units is two or more, the linkage configured by the electromagnetic system spans all contact units, so that the moving trajectory of the linkage is perpendicular to the central axis of the linkage, which requires a large amount of reserved space, which is not conducive to reducing the volume of the switch device. Summary of the Invention

[0003] An object of the present invention is to overcome at least one drawback of the prior art and provide a switch device.

[0004] To achieve the above object, the present invention adopts the following technical solutions:

[0005] The present invention provides a switching device, including an electromagnetic system and two contact systems, the electromagnetic system including a coil assembly, the coil assembly being cooperatively provided with a moving iron core and a stationary iron core, and a magnetic gap being left between the moving iron core and the stationary iron core, each contact system including a moving contact assembly and a stationary contact group cooperating with each other, the electromagnetic system being arranged between the two contact systems, the moving iron core being linked to a linkage part, the two ends of the linkage part being respectively linked to the moving contact assemblies of the two contact systems, and under the drive of the electromagnetic system, the moving trajectories of the moving contact assembly, the moving iron core and the linkage part are all parallel to the central axis of the linkage part, and the central axis of the linkage part is connected between the two ends of the linkage part.

[0006] Preferably, the moving contact assembly in one contact system is located between the electromagnetic system and the static contact group, and the static contact group in the other contact system is located between the electromagnetic system and the moving contact assembly.

[0007] Preferably, the electromagnetic system further comprises at least one reset member, and the reset member is connected to an end of the moving contact assembly away from the coil assembly.

[0008] Preferably, the coil assembly includes a coil frame and a coil wound around the outside of the coil frame, the static iron core is arranged at one end of the coil frame, one end of the moving iron core is slidably assembled in the central hole of the coil frame and is spaced opposite to the static iron core, the linkage part slides through the central hole, and the two ends of the linkage part respectively serve as driving parts extending beyond the two ends of the central hole for linkage connection with the two moving contact assemblies.

[0009] Preferably, the moving iron core and the static iron core are located between the two driving parts.

[0010] Preferably, the linkage member includes two linkage arms that are spaced apart and opposite to each other, and a limiting arm is connected between the two linkage arms, so that the same end of the two linkage arms forms a driving portion with a clamping gap.

[0011] Preferably, the driving parts at both ends of the linkage are a first driving part and a second driving part, the clamping depth of the first driving part is greater than the clamping depth of the second driving part, and the moving iron core is located inside the first driving part and abuts against the limiting arm.

[0012] Preferably, at least one first connecting hole is opened in the middle of the linkage arm corresponding to the moving iron core, and a first connecting member is arranged in the first connecting hole; each driving part and a moving contact assembly are opened with at least one second connecting hole corresponding to each other, and a second connecting member is arranged in the second connecting hole.

[0013] Preferably, the moving contact assembly includes a contact support and a moving contact bridge, the contact support is linked to the linkage part, the moving contact bridge is arranged in the accommodating cavity of the contact support, and the two ends of the moving contact bridge are respectively provided with moving contact parts and extend outside the accommodating cavity, and the static contact group includes two static contacts, and the static contact part of each static contact cooperates with a moving contact part.

[0014] Preferably, a contact spring is provided in the accommodating cavity, one end of the contact spring abuts against the accommodating cavity, and the other end of the contact spring abuts against a side of the moving contact bridge facing away from the static contact group.

[0015] Preferably, the static contact includes a straight static contact plate, the middle part of which is bent at least once so that the planes where the two ends of the static contact plate are located form an angle, one end of the static contact plate is provided with a static contact point as a static contact portion, and the other end of the static contact plate is provided with a wiring portion.

[0016] In the switch device of the present invention, the two contact units are respectively arranged on opposite sides of the electromagnetic system, and both ends of the linkage can drive the moving contact assembly. At the same time, the moving trajectories of the moving contact assembly, the moving iron core and the linkage are all parallel to the central axis of the linkage, occupying a small space, which is conducive to reducing the volume of the switch device.

[0017] In addition, the reset member of the electromagnetic system is arranged at the end of the moving contact assembly away from the coil assembly, which is convenient for assembly and also helps to reset the electromagnetic system as a whole.

[0018] In addition, the driving part of the linkage adopts a clamping structure, which is convenient for connection with the moving contact assembly. In addition, the moving iron core can also be located in one of the driving parts, which improves the connection stability between the linkage and the moving iron core and the moving contact assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the internal structure of the switch device in the present invention;

[0020] Figure 2 yes Figure 1 A top view of

[0021] Figure 3 This is a schematic diagram of the cooperation between the electromagnetic system and the two contact units in the present invention. Figure 1 ;

[0022] Figure 4 This is a schematic diagram of the cooperation between the electromagnetic system and the two contact units in the present invention. Figure 2 ;

[0023] Figure 5 It is a schematic diagram of the coordination between the electromagnetic system and the contact unit in the present invention;

[0024] Figure 6 This is a schematic diagram of the structure of the contact unit in the present invention. Figure 1 ;

[0025] Figure 7 This is a schematic diagram of the structure of the contact unit in the present invention. Figure 2 ;

[0026] Figure 8 This is a schematic diagram of the structure of the contact unit in the present invention. Figure 3 ;

[0027] Figure 9 This is a schematic diagram of the structure of the contact unit in the present invention. Figure 4 ;

[0028] Figure 10 This is a schematic diagram of the structure of the moving contact bridge and the arc extinguishing system in the present invention;

[0029] Figure 11 It is a structural diagram of the electromagnetic system in the present invention;

[0030] Figure 12 It is a schematic diagram of the coordination of the electromagnetic system and the moving contact assembly in the present invention;

[0031] Figure 13 is an exploded schematic diagram of the electromagnetic system of the present invention;

[0032] Figure 14 It is a structural diagram of the linkage member in the present invention;

[0033] Figure 15 It is a structural schematic diagram of the moving contact assembly in the present invention;

[0034] Figure 16 It is a structural diagram of the moving contact bridge in the present invention;

[0035] Figure 17 It is a structural schematic diagram of the static contact in the present invention;

[0036] 1-base, 11-base, 2-contact unit, 21-moving contact assembly, 211-contact support, 2110-accommodation cavity, 212-moving contact bridge, 2121-moving contact part, 2122-moving contact, 2123-moving arc-striking part, 213-contact spring, 22-static contact, 221-static contact plate, 2211-static contact part, 2212-connection part, 2213-connection section, 2214-static contact, 23-arc extinguishing system, 231-arc extinguishing chamber, 2341-moving arc-striking plate, 23 42-static arc-striking plate, 3-electromagnetic system, 31-coil skeleton, 311-end wall, 312-hollow shaft, 32-moving iron core, 321-moving matching part, 33-static iron core, 331-extension arm, 332-static matching part, 34-reset part, 35-linkage part, 35a-central axis of the linkage part, 350-driving part, 351-linkage arm, 352-limiting arm, 36-coil, a1-first connecting hole, b1-second connecting hole, a2-first connecting part, b2-second connecting part. DETAILED DESCRIPTION

[0037] The following embodiments are combined with the accompanying drawings to further illustrate the specific implementation of the switch device of the present invention. The switch device of the present invention is not limited to the description of the following embodiments.

[0038] like Figure 1-3 As shown, the switch device includes a base 1, and two contact units 2 are arranged in the base 1, each contact unit 2 includes a contact system, the contact system is connected between a pair of wiring components (not shown), and the pair of wiring components are divided into input terminals and output terminals. The contact system includes a moving contact component 21 and a static contact group that cooperate with each other. The moving contact component 21 is directly or indirectly driven by the moving iron core 32, and the static contact group includes two static contacts 22. Each static contact 22 is provided with a wiring portion 2212 for connecting to a wiring component, and each wiring portion 2212 corresponds to a wiring slot provided on the base 1; preferably, each contact unit 2 can also be configured with an arc extinguishing system 23, and the arc extinguishing system 23 is arranged on one side of the contact system for extinguishing the arc generated when the contact system is opened and closed. The arc extinguishing system 23 can adopt existing technology.

[0039] An electromagnetic system 3 for driving the contact unit 2 is also provided in the base 1. The electromagnetic system 3 includes a coil assembly, a moving iron core 32 and a static iron core 33. The coil assembly is usually connected to a control system (not shown). The control system can be provided in the base 1 or outside the base 1. The static iron core 33 and the moving iron core 32 are respectively provided on the coil assembly. A magnetic gap is left between the moving iron core 32 and the static iron core 33 (a magnetic gap refers to a very short air distance between two magnetic materials in a magnetic circuit). The coil assembly drives the moving iron core 32 to move according to the control signal output by the control system.

[0040] For the convenience of description, the length direction of the base 1 is taken as the first direction, that is, Figure 1 The direction of the middle X axis is the height direction of the base 1 as the second direction, that is, Figure 1 The direction of the Y axis is the thickness direction of the base 1 as the third direction, that is, Figure 1 In the direction of the middle Z axis, the first direction, the second direction and the third direction are perpendicular to each other.

[0041] like Figure 1-5 , 14, the improvement of the present application is that the electromagnetic system 3 is arranged between the two contact systems, the movable iron core 32 is linked to the linkage member 35, and the two ends of the linkage member 35 are respectively linked to the movable contact assemblies 21 of the two contact systems. Under the drive of the electromagnetic system 3, the moving trajectories of the movable contact assembly 21, the movable iron core 32 and the linkage member 35 are all parallel to the central axis 35a of the linkage member (see Figure 14 ), and the central axis 35a of the linkage member is connected between the two ends of the linkage member 35.

[0042] In this way, the two contact units 2 are respectively arranged on opposite sides of the electromagnetic system 3, and both ends of the linkage 35 can drive the moving contact assembly 21. At the same time, the moving trajectories of the moving contact assembly 21, the moving iron core 32 and the linkage 35 are all parallel to the central axis of the linkage 35, occupying a small space, which is conducive to reducing the volume of the switching device.

[0043] Further, such as Figure 2 As shown, the electromagnetic system 3 also includes at least one reset member 34, which is connected to one end of the moving contact assembly 21 away from the coil assembly. Preferably, only one of the moving contact assemblies 21 is connected with the reset member 34, which is convenient for assembly, helps to reset the electromagnetic system 3 as a whole, and helps to reduce costs.

[0044] Combine Figure 1-17 A specific embodiment of a switch device is provided.

[0045] like Figure 1 、 2As shown, the switch device includes a base 1, and an electromagnetic system 3 is arranged in the middle of the base 1. The electromagnetic system 3 includes a coil assembly and a moving iron core 32 and a static iron core 33 arranged on the coil assembly, wherein the central axis of the coil assembly is parallel to the first direction, and the moving iron core 32 and the static iron core 33 are spaced relative to each other in the first direction to form a magnetic gap for driving the moving iron core 32 to move along the first direction.

[0046] A contact unit 2 is provided at each end of the base 1, so that the two contact units 2 are located on opposite sides of the electromagnetic system 3 in the first direction. Each contact unit 2 includes a contact system and an arc extinguishing system 23. The contact system includes a movable contact assembly 21 and a static contact group that cooperate with each other. The movable contact assembly 21 of each contact unit 22 is directly or indirectly driven and connected to the movable iron core 32, so that the movable contact assembly 21 approaches or moves away from the static contact group along the first direction. The static contact group includes two static contacts 22, each static contact 22 is provided with a wiring portion 2212, and each wiring portion 2212 corresponds to a wiring slot opened on the base 1. The arc extinguishing system 23 is arranged on one side of the contact system for extinguishing the arc generated when the contact system is disconnected.

[0047] In this embodiment, if Figure 2-5 As shown, the contact systems and arc extinguishing systems 23 in the two contact units 2 have the same structure, the moving contact assembly 21 of one contact unit 2 is located between the electromagnetic system 3 and the corresponding static contact group, and the static contact group in the other contact unit 2 is located between the electromagnetic system 3 and the corresponding moving contact assembly 21. Such a structure allows the contact systems of the two contact units 2 to be synchronously driven to close or open when the moving iron core 32 moves along the first direction.

[0048] Combine Figure 1-4 11-13 provide the specific structure of the electromagnetic system 3 in this embodiment.

[0049] like Figure 1-4, 11 and 14, the electromagnetic system 3 includes a coil assembly, a static iron core 33 and a moving iron core 32, the coil assembly includes a coil skeleton 31 and a coil 36 wound on the outside of the coil skeleton 31, the static iron core 33 is fixedly arranged on the coil skeleton 31 and arranged along the outside of the coil assembly, the moving iron core 32 slides through the central hole of the coil skeleton 31, and at least two magnetic gaps are left between the moving iron core 32 and the static iron core 33. Specifically, one end of the moving iron core 32 located in the central hole is spaced apart from the static iron core 33 to form a first magnetic gap, and one end of the moving iron core 32 located outside the central hole is spaced apart from the static iron core 33 to form a second magnetic gap, which is used to ensure the driving force of the moving iron core 32; the moving iron core 32 is also linked to a linkage The linkage member 35 preferably slides through the central hole so that the two ends of the linkage member 35 extend beyond the two ends of the central hole as driving parts 350, and the central axis 35a of the linkage member connected between the two ends of the linkage 35 also passes through the central hole, that is, the central axis 35a of the linkage member is parallel to the first direction. The length of the linkage member 35 is long enough so that the moving iron core 32 and the static iron core 33 are located between the two driving parts 350. Each driving part 350 can be driven and connected to the moving contact assembly 21 in a contact unit 2. In this embodiment, the movement trajectories of the moving contact assembly 21, the moving iron core 32 and the linkage member 35 are all parallel to the first direction, and the central axis of the linkage member 35 is also parallel to the first direction. Of course, the linkage member 35 can also be set along the outside of the coil assembly, but such a structure increases the overall volume of the electromagnetic system 3.

[0050] Specific as Figure 11-13 As shown, the coil bobbin 31 includes a pair of end walls 311 and a hollow shaft 312 connected between the pair of end walls 311. The middle portion of each end wall 311 is connected to the hollow area of ​​the hollow shaft 312 to form a central hole. The coil 36 is wound around the outside of the hollow shaft 312. At least one side edge of each end wall 311 extends outward to form a retaining wall. In the figure, the opposite side edges of each end wall 311 extend outward to form a retaining wall. When the coil bobbin 31 is arranged in the base 1 along the first direction, the two end walls 311 are spaced apart and opposite to each other in the second direction. The retaining wall on each end wall 311 extends in the second direction, which can play a role in separating the two contact units 2. Figure 1 In the figure, each end wall 311 is approximately rectangular plate-shaped after being extended to form a retaining wall. The retaining wall formed by the upper edge of each end wall 311 can abut against the inside of the base 1, and the retaining wall formed by the lower edge of each end wall 311 extends to the middle of the arc extinguishing system 23, that is, part of the area in the arc extinguishing system 23 is opposite to the retaining wall.

[0051] like Figure 1-4As shown in Figures 11-14, the static iron core 33 is fixedly arranged at one end of the coil skeleton 31, with the middle part of the static iron core 33 facing the central hole at one end of the coil skeleton 31, but the middle part of the static iron core 33 does not completely block one end of the central hole, and a gap is left between the edge of the static iron core 33 and the edge of the central hole for the linkage 35 to pass through. The two ends of the static iron core 33 extend along the axial direction of the coil skeleton 31 to form extension arms 331, and the end of each extension arm 331 is bent and extends toward the central hole near the other end of the coil skeleton 31 to form a static fitting portion 332. In the figure, each extension arm 331 extends along the side of the end wall 311 where no retaining wall is set, and the two extension arms 331 are spaced opposite to each other in the third direction, so that the static iron core 33 occupies less space in the third direction when it is set in the base 1. It can also be understood that the static iron core 33 as a whole is a rectangular frame surrounding the outside of the coil assembly.

[0052] like Figure 11-14 As shown, the moving iron core 32 as a whole cooperates with the coil assembly and the static iron core 33 along the first direction. One end of the moving iron core 32 slides through the central hole and is spaced opposite to the static iron core 33 to form a first magnetic gap. The other end of the moving iron core 32 is away from the static iron core 33 and is located outside the central hole. One end of the moving iron core 32 located outside the central hole extends to both sides to form a moving matching part 321, so that the moving iron core 32 as a whole has a T-shaped structure. Each moving matching part 321 is spaced opposite to a static matching part 332 in the first direction to form a second magnetic gap.

[0053] like Figure 13 、 14 As shown, the linkage member 35 includes two linkage arms 351 that are spaced apart and opposite to each other, and each linkage arm 351 is in the shape of a strip plate as a whole. A limiting arm 352 is connected between the two linkage arms 351, so that the same end of the two linkage arms 351 forms a driving portion 350 with a clamping gap. In this embodiment, the overall length of the linkage member 35 is relatively long, so that the static iron core 33 and the moving iron core 32 are located between the two driving portions 350. In this embodiment, one of the driving portions 350 can be simultaneously linked and connected with the moving contact assembly 21 and the moving iron core 32. Preferably, the driving portions 350 at both ends of the linkage member 35 are divided into a first driving portion and a second driving portion, wherein the clamping depth of the first driving portion is greater than the clamping depth of the second driving portion, and the moving iron core 32 is located inside the first driving portion and abuts against the limiting arm 352. The position of the first driving portion away from the limiting arm 352 is used to connect with the moving contact assembly 21 of one contact unit 2, and the second driving portion is connected with the moving contact assembly 21 of another contact unit 2.

[0054] In this embodiment, a first connecting hole a1 is provided in the middle of the linkage member 35, and correspondingly, a first connecting hole a1 is also provided on the moving iron core 32. By arranging a first connecting member a2 in the first connecting hole a1, the moving iron core 32 and the linkage member 35 can be connected together; each driving part 350 is provided with a second connecting hole b1, that is, a second connecting hole b1 is provided near the end of each linkage arm 351, and correspondingly, a second connecting hole b1 is also provided on each moving contact assembly 21. By arranging a second connecting member b2 in the second connecting hole b1, the moving contact assembly 21 and the driving part 350 are connected together. The first connecting member a2 and the second connecting member b2 are preferably pins.

[0055] Further, such as Figure 2 As shown, the electromagnetic system 3 also includes at least one reset member 34. The reset member 34 in this embodiment is a spring. In the first direction, the reset member 34 is connected between the moving contact assembly 21 of the contact unit 2 and the base 1. The reset member 34 can drive the electromagnetic system 3 to reset when the contact system is opened through the linkage relationship between the moving contact assembly 21 and the linkage member 35. In the figure, the reset member 34 is only provided on one of the moving contact assemblies 21. In the third direction, the reset member 34 is located between the two static contacts 22 of the same contact system.

[0056] Combine Figure 3-10 , 12 and 15-17 provide the specific structure of the contact system in this embodiment.

[0057] like Figure 3-10 As shown, the contact system includes a moving contact assembly 21 and a static contact group that cooperate with each other, wherein the moving contact assembly 21 and the static contact group are spaced apart in a first direction, and the moving contact assembly 21 includes a contact support 211 and a moving contact bridge 212, wherein the moving contact bridge 212 is arranged in the accommodating cavity 2110 of the contact support 211 along the third direction, and the two ends of the moving contact bridge 212 respectively serve as two moving contact parts 2121 extending to the outside of the contact support 211, and the contact support 211 is linked to the linkage member 35, that is, a second connecting hole b1 is provided on the contact support 211. Furthermore, a contact spring 213 is provided in the accommodating cavity 2110. The contact spring 213 is provided on the side of the moving contact bridge 212 facing away from the static contact 22, and is used to provide contact pressure when the contact system is closed, that is, one end of the contact spring 213 abuts against the accommodating cavity 2110, and the other end of the contact spring 213 abuts against the side of the moving contact bridge 212 facing away from the static contact group.

[0058] like Figure 15 、 16As shown, the moving contact bridge 212 is a strip-shaped plate structure as a whole, and a moving contact portion 2121 is provided at each end of the moving contact bridge 212. Each moving contact portion 2121 is spaced apart from the static contact portion 2211 of a static contact 22, and each moving contact portion 2121 is provided with a moving contact point 2122. The edge of the moving contact bridge 212 on at least one side of each moving contact point 2122 extends outward to form a moving arc-striking portion 2123, and the moving arc-striking portion 2123 is close to the arc extinguishing system. In this embodiment, the edges of the moving contact bridge 212 on both sides of each moving contact 2122 are It extends outward to form a moving arc-striking portion 2123, and the side of each moving arc-striking portion 2123 facing the static contact portion 2211 is an inclined surface, and the thickness of each moving arc-striking portion 2123 gradually decreases along the direction from the moving contact 2122 to the edge of the moving contact bridge 212. Furthermore, a moving arc-striking portion 2123 on each moving contact portion 2121 is connected to a moving arc-striking plate 2341, and the moving arc-striking plate 2341 can extend obliquely along the inclined surface of the moving arc-striking portion 2123, which not only facilitates the assembly of the moving arc-striking plate 2341, but also improves the arc-striking efficiency.

[0059] like Figure 16 As shown, the static contact group includes two static contacts 22 arranged side by side, each static contact 22 includes a straight-shaped static contact plate 221, and each static contact plate 221 is provided with a static contact portion 2211 and a wiring portion 2212 at both ends. The static contact portion 2211 is provided with a static contact point 2214, and the wiring portion 2212 is provided with a wiring hole. Preferably, the plane where the static contact portion 2211 is located is perpendicular to the plane where the wiring portion 2212 is located.

[0060] When the static contact 22 is arranged in the base 1, the static contact portion 2211 is arranged along the side position close to the end of the base 1 in the second direction, the static contact portion 2211 and the dynamic contact portion 2121 are spaced apart and opposite to each other in the first direction, and the wiring portion 2212 is arranged along the first direction. The wiring portion 2212 corresponds to the wiring slot opened on the base 1. In this embodiment, one wiring portion 2212 in the same contact system is used for incoming wires, and the other wiring portion 2212 is used for outgoing wires.

[0061] Furthermore, in the second direction, at least a partial area in the middle of the static contact plate 221 corresponds to the gap between the static contact portion 2211 and the moving contact portion 2121, so that the current flowing through the middle of the static contact plate 221 is opposite to the direction of the arc current generated between the moving contact portion 2121 and the static contact portion 2211; the edge of one end of the static contact portion 2211 away from the wiring portion 2212 can extend outward to form a static arc-striking portion, and the side of the static arc-striking portion facing the moving contact assembly 21 is a slope, and the inclined surface of the static arc-striking portion is also conducive to connecting the static arc-striking plate 2342.

[0062] like Figure 3-10As shown, each contact unit 2 further includes an arc extinguishing system 23, which is arranged on one side of the contact system. In the figure, in the second direction, the contact system is located above the arc extinguishing system 23, and the arc extinguishing system can adopt existing technology.

[0063] It should be noted that, in the description of the present invention, the terms "upper," "lower," "left," "right," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, or are conventionally placed in use. They are intended solely for ease of description and do not necessarily require the devices or components referred to to have a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," and "third," etc., are used solely for distinction and description and should not be construed as indicating relative importance.

[0064] The above is a further detailed description of the present invention in conjunction with specific preferred embodiments, and the specific implementation of the present invention should not be considered to be limited to these descriptions. For those skilled in the art of the present invention, without departing from the concept of the present invention, several simple deductions or substitutions can be made, which should be considered to fall within the scope of protection of the present invention.

Claims

1. A switch device comprising an electromagnetic system (3) and two contact systems, wherein the electromagnetic system (3) comprises a coil assembly, wherein the coil assembly is provided with a moving iron core (32) and a stationary iron core (33), and a magnetic gap is left between the moving iron core (32) and the stationary iron core (33), and each contact system comprises a moving contact assembly (21) and a stationary contact group that cooperate with each other, characterized in that: The electromagnetic system (3) is arranged between the two contact systems, the movable iron core (32) is linked to a linkage member (35), and the two ends of the linkage member (35) are respectively linked to the movable contact assemblies (21) of the two contact systems. Under the drive of the electromagnetic system (3), the moving contact assembly (21), the movable iron core (32) and the linkage member (35) have moving trajectories parallel to the central axis (35a) of the linkage member, and the central axis (35a) of the linkage member is connected between the two ends of the linkage member (35).

2. The switch device according to claim 1, characterized in that: The moving contact assembly (21) in one of the contact systems is located between the electromagnetic system (3) and the static contact group, and the static contact group in the other contact system is located between the electromagnetic system (3) and the moving contact assembly (21).

3. The switch device according to claim 1, characterized in that: The electromagnetic system (3) further comprises at least one reset member (34), wherein the reset member (34) is connected to an end of the moving contact assembly (21) away from the coil assembly.

4. The switch device according to claim 1, wherein: The coil assembly includes a coil frame (31) and a coil (36) wound around the outside of the coil frame (31); the static iron core (33) is arranged at one end of the coil frame (31); one end of the moving iron core (32) is slidably assembled in the central hole of the coil frame (31) and spaced opposite to the static iron core (33); the linkage member (35) slides through the central hole; the two ends of the linkage member (35) respectively serve as driving parts (350) extending outside the two ends of the central hole for linkage connection with the two moving contact assemblies (21).

5. The switch device according to claim 4, characterized in that: The moving iron core (32) and the static iron core (33) are located between the two driving parts (350).

6. The switch device according to claim 4, characterized in that: The linkage member (35) comprises two linkage arms (351) spaced apart and facing each other, a limiting arm (352) being connected between the two linkage arms (351), so that the same end of the two linkage arms (351) forms a driving portion (350) with a clamping gap.

7. The switch device according to claim 6, characterized in that: The driving parts (350) at both ends of the linkage member (35) are divided into a first driving part and a second driving part, the clamping depth of the first driving part is greater than the clamping depth of the second driving part, and the moving iron core (32) is located inside the first driving part and abuts against the limiting arm (352).

8. The switch device according to claim 6, characterized in that: At least one first connection hole (a1) is provided in the middle of the linkage arm (351) corresponding to the moving iron core (32), and a first connection member (a2) is provided in the first connection hole (a1); and at least one second connection hole (b1) is provided in each driving portion (350) corresponding to a moving contact assembly (21), and a second connection member (b2) is provided in the second connection hole (b1).

9. The switch device according to any one of claims 1 to 8, characterized in that: The moving contact assembly (21) comprises a contact support (211) and a moving contact bridge (212); the contact support (211) is linked to a linkage member (35); the moving contact bridge (212) is arranged in an accommodating cavity (2110) of the contact support (211); both ends of the moving contact bridge (212) are respectively provided with moving contact portions (2121) and extend outside the accommodating cavity (2110); the static contact group comprises two static contacts (22); the static contact portion (2211) of each static contact (22) cooperates with a moving contact portion (2121).

10. The switch device according to claim 9, characterized in that: A contact spring (213) is provided in the accommodating cavity (2110), one end of the contact spring (213) abuts against the accommodating cavity (2110), and the other end of the contact spring (213) abuts against a side of the moving contact bridge (212) facing away from the static contact group.

11. The switch device according to claim 9, characterized in that The static contact (22) comprises a straight static contact plate (221), the middle portion of the static contact plate (221) being bent at least once so that the planes where the two ends of the static contact plate (221) are located form an angle, one end of the static contact plate (221) being a static contact portion (2211) being provided with a static contact point (2214), and the other end of the static contact plate (221) being provided with a wiring portion (2212).

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