Contact system for electrical switch

Abstract

The utility model provides a contact system of an electrical switch, which comprises a base and a contact support rotationally mounted on the base, a moving contact is mounted on the contact support, a transverse shaft is arranged in the contact support, the moving contact comprises a plurality of moving contact blades which are stacked and arranged at intervals, the plurality of moving contact blades are rotationally mounted on the transverse shaft of the contact support, and the moving contact blades are arranged on the transverse shaft of the contact support. An elastic piece is arranged between each moving contact blade and the contact support, the moving contact rotates along with the contact support and is in contact with or disconnected from a static contact in the base, the contact support comprises two limiting plates located on the two sides of the moving contact, each limiting plate comprises a rotating shaft protruding towards the moving contact, a first boss is arranged in the base, and the first boss is arranged on the rotating shaft. The first boss is provided with rotating shaft grooves matched with the rotating shafts, the bus connection section comprises two first limiting surfaces, and the two first limiting surfaces limit the two rotating shafts in the two rotating shaft grooves respectively. Other rotating shafts or mounting plates do not need to be independently arranged, so that the internal structure is simpler, and the assembly process is simpler.

Description

Technical Field

[0001] This utility model relates to the field of low-voltage electrical appliances, specifically to a contact system for an electrical switch. Background Technology

[0002] In power distribution systems, disconnecting switches or circuit breakers are commonly used to connect and disconnect circuits. The contact system is an indispensable component of disconnecting switches and circuit breakers. The contact system includes moving contacts and stationary contacts. Driven by a mechanism, the contact system rotates via a rotating center to achieve the opening and closing actions of the product.

[0003] The prior art, patent announcement number CN207587659U, discloses a contact system. This contact system has a square groove (or other shape) on the base to accommodate the contact system, and then two limiting plates are added. Two sliding grooves for installing the limiting plates are set on both sides of the square groove. Rotating shafts are set on both sides of the contact system. Mounting holes are opened on the limiting plates. The two rotating shafts are respectively installed in the mounting holes of the two limiting plates. Then the limiting plates are slidably pushed into the sliding grooves so that the contact system is installed on the base. This patent uses a lot of parts and the assembly process is complicated. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a contact system for an electrical switch that is simple in structure and easy to assemble.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] This application provides a contact system for an electrical switch, including a base and at least one contact support. The contact support is rotatably mounted on the base, and a moving contact is mounted on the contact support. A horizontal axis is disposed within the contact support. The moving contact includes multiple stacked and spaced-apart moving contact pieces, which are rotatably mounted on the horizontal axis of the contact support. The contact system also includes a busbar connection section fixedly mounted on the base, which is electrically connected to the moving contact. An elastic element is disposed between the moving contact pieces and the contact support. The moving contact rotates with the contact support, contacting or disengaging with a stationary contact within the base.

[0007] The contact support includes two limiting plates located on both sides of the moving contact. Each limiting plate includes a rotating shaft protruding towards the moving contact. A first boss is provided in the base, and a rotating shaft groove is provided on the first boss to cooperate with the rotating shaft. The busbar connection section includes two first limiting surfaces, which respectively limit the two rotating shafts in the two rotating shaft grooves, so that the contact support rotates around the rotating shaft in the base.

[0008] In one possible implementation, the first limiting surface of the busbar connection segment is tangent to the rotating shaft.

[0009] In one possible implementation, the base includes at least one contact chamber, at least one stationary contact is fixedly mounted in at least one contact chamber, a first boss is disposed at the bottom of the contact chamber, the first boss has a receiving gap with the two chamber walls of the contact chamber, and the rotating shaft groove is provided on the side of the first boss facing the chamber wall.

[0010] In one possible implementation, strip-shaped slide rails are provided on the chamber walls on both sides of the contact chamber, and the back of the rotating shaft protrudes from the side of the limiting plate opposite to the rotating shaft, forming a first rotating shaft protrusion. The first rotating shaft protrusion is slidably installed in the strip-shaped slide rail along the thickness direction of the base.

[0011] In one possible implementation, the busbar connection section includes a bent and integrally formed moving contact connection portion and a transition mounting portion, wherein the moving contact connection portion includes the first limiting surface.

[0012] The moving contact also includes a plurality of flexible connecting pieces. The plurality of moving contact pieces and the plurality of flexible connecting pieces are fixedly connected in a one-to-one correspondence. The end of the flexible connecting piece away from the moving contact includes a first connecting end. The plurality of first connecting ends are fixedly connected into the plurality of first notches in a one-to-one correspondence.

[0013] In one possible implementation, the end of the moving contact connection includes a plurality of spaced-apart support platforms, with the first notch formed between adjacent support platforms. The two support platforms on both sides of the end of the moving contact connection include the first limiting surface, which is the side of the support platform facing the bottom of the base.

[0014] In one possible implementation, at least one cylindrical boss extends from the bottom of the base toward the opening of the base, and the side of the adapter mounting portion facing the cylindrical boss abuts against at least one of the cylindrical bosses.

[0015] In one possible implementation, the contact support further includes a moving contact mounting member and a moving contact support base, the moving contact being mounted between the moving contact mounting member and the moving contact support base, and the moving contact mounting member and the moving contact support base limiting the moving contact, with two limiting plates fixedly mounted on both sides of the moving contact mounting member and the moving contact support base.

[0016] In one possible implementation, the side of the moving contact mounting member facing away from the moving contact is an arc-shaped surface.

[0017] In one possible implementation, one end of the limiting plate includes a rotating mounting portion, the rotating shaft is disposed on the rotating mounting portion, and the other end includes a first mounting portion, the first mounting portion including at least one first mounting hole and at least one second mounting hole, at least one first mounting protrusion is provided on both sides of the moving contact mounting member, and at least one second mounting protrusion is provided on both sides of the moving contact support, the first mounting hole and the first mounting protrusion are fitted together and fixed, and the second mounting hole and the second mounting protrusion are fitted together and fixed.

[0018] Compared to existing technologies, the contact system of the electrical switch provided in this application includes a base and at least one contact support. The contact support is rotatably mounted on the base, and a moving contact is mounted on the contact support. A horizontal axis is provided within the contact support. The moving contact includes multiple stacked and spaced-apart moving contact pieces, which are rotatably mounted on the horizontal axis of the contact support. An elastic element is provided between the moving contact pieces and the contact support. The moving contact rotates with the contact support and contacts or disconnects from a stationary contact within the base. The contact support includes two limiting plates located on both sides of the moving contact. Each limiting plate includes a rotating shaft protruding towards the moving contact. The base contains... The system includes a first boss with a shaft groove for mounting to the rotating shaft. The contact system also includes a busbar connection section fixedly mounted on the base. The busbar connection section includes two first limiting surfaces that respectively limit the two rotating shafts within the two shaft grooves. The limiting plates located on both sides of the contact support can clamp and fix the moving contact. The rotating shaft on the limiting plate can also be mounted rotatably in the base by engaging with the shaft groove on the base. This eliminates the need for separate rotating shafts or mounting plates, reducing the number of parts in the contact system of the electrical switch, making the internal structure simpler and the assembly process easier.

[0019] Furthermore, since the first limiting surface is tangent to the rotating shaft, the busbar connecting section has a better limiting effect on the rotating shaft, improving the stability of the contact supporting rotation.

[0020] Furthermore, the first boss is provided at the bottom of the contact chamber of the base, and the rotating shaft groove is provided on the side of the first boss facing the chamber wall. The first boss is used to create a receiving gap with the chamber walls on both sides of the contact chamber. The limiting plate is installed in the contact chamber. The receiving gap is used to avoid the thickness surface of the limiting plate, so that the rotating shaft can be installed into the rotating shaft groove. After the thickness surface of the limiting plate is inserted into the receiving gap, it can also produce a good limiting effect.

[0021] Furthermore, strip-shaped slide rails are provided on the chamber walls on both sides of the contact chamber. The back of the rotating shaft protrudes from the side of the limiting plate opposite to the rotating shaft, forming a first rotating shaft protrusion. The rotating shafts on both sides of the limiting plate and the first rotating shaft protrusion work together to rotate, improving reliability. The first rotating shaft protrusion is slidably installed in the strip-shaped slide rail along the thickness direction of the base. The positions of the strip-shaped slide rail on the chamber wall and the rotating shaft groove on the first protrusion are correspondingly connected. The sliding cooperation between the strip-shaped slide rail and the first rotating shaft protrusion can not only limit the limiting plate, but also guide it, guiding the limiting plate to slide smoothly into the contact chamber, so that the rotating shaft is just locked into the rotating shaft groove. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the contact system of this utility model;

[0023] Figure 2 and Figure 3 This is a structural diagram of the contact system of this utility model after disassembly;

[0024] Figure 4 This is a disassembly diagram of the contact support, moving contact, and busbar connection section in this utility model;

[0025] Figure 5 This is a schematic diagram of the busbar connection section in this utility model;

[0026] The reference numerals in the attached drawings include: moving contact 3; base 1; contact support 2; limiting plate 21; rotating shaft 22; rotating shaft groove 16; first limiting surface 44; moving contact mounting part 23; moving contact support seat 24; arc-shaped surface 231; first moving contact piece 31; second moving contact piece 32; contact chamber 11; chamber wall 12; strip slide rail 13; first rotating shaft protrusion 25; first boss 14; first mounting part 26; busbar connection section 4; moving contact connection part 41; transition mounting part 42; flexible connecting piece 33; first notch 43; columnar boss 15. Detailed Implementation

[0027] The specific embodiments of this utility model are further described below with reference to the accompanying drawings. The scope of protection of this utility model is not limited to the description of the following embodiments.

[0028] Electrical switches include various types of switching devices such as circuit breakers, disconnectors, load switches, and contactors. They are used to control, protect, and isolate circuits in power systems to ensure the safe and stable operation of the power system. Electrical switches play a vital role in power systems.

[0029] An electrical switch includes a contact system for disconnecting and connecting a circuit. The contact system includes a moving contact 3 and a stationary contact. When the stationary contact and the moving contact 3 are connected, the circuit can be connected. When the moving contact 3 and the stationary contact are disconnected, the circuit can be disconnected.

[0030] Preferably, in this embodiment of the application, the electrical switch is an isolating switch.

[0031] like Figures 1-5 As shown, the electrical switch provided in this application includes a base 1 and at least one contact support 2. The contact support 2 is rotatably mounted on the base 1, and a moving contact 3 is mounted on the contact support 2. A horizontal shaft 27 is provided inside the contact support 2. The moving contact 3 includes a plurality of stacked and spaced moving contact pieces. The plurality of moving contact pieces are rotatably mounted on the horizontal shaft 27 of the contact support 2. An elastic element is provided between the moving contact pieces and the contact support 2. The moving contact 3 rotates with the contact support 2 and contacts or disconnects from the stationary contact in the base 1. Preferably, an elastic element is provided between each moving contact piece and the contact support 2. The elastic element can be, but is not limited to, a compression spring, a torsion spring, a tension spring, or a spring. The elastic element between the moving contact piece and the contact support 2 can play an overtravel role during the contact process between the moving contact and the stationary contact. That is, when the electrical switch is closed, at the moment the moving contact 3 contacts the stationary contact, the moving contact 3 rotates a certain angle around the horizontal axis 27 in the original direction within the contact support 2 due to inertia, which generates a force on the elastic element and causes the elastic element to deform. This can enhance the stability of the electrical connection between the moving contact and the stationary contact. At the same time, the elastic element can also play a buffering role and provide a certain protection for the contact system.

[0032] like Figures 2-4 As shown, the contact support 2 includes two limiting plates 21 located on both sides of the moving contact 3. Each limiting plate 21 includes a rotating shaft 22 protruding towards the moving contact 3. A first boss 14 is provided in the base 1. The first boss 14 is provided with a rotating shaft groove 16 that cooperates with the rotating shaft 22. The contact system also includes a busbar connection section 4 fixedly installed on the base 1. The busbar connection section 4 includes two first limiting surfaces 44. The two first limiting surfaces 44 respectively limit the two rotating shafts 22 in the two rotating shaft grooves 16, so that the contact support 2 is rotatably installed on the base 1 through the rotating shaft 22.

[0033] The limiting plates 21 located on both sides of the contact support 2 can clamp and fix the moving contact 3. The rotating shaft 22 on the limiting plate 21 can cooperate with the rotating shaft groove 16 on the base 1 to allow the contact support 2 to be rotatably installed in the base 1. There is no need to set up other rotating mechanisms or mounting plates separately, which can reduce the number of parts in the contact system of the electrical switch, making the internal structure simpler and the assembly process simpler.

[0034] Preferably, the first limiting surface 44 of the busbar connection section 4 is tangent to the rotating shaft 22, which can have a better limiting effect and improve the stability of the contact support 2 rotation.

[0035] Preferred, such as Figure 3 As shown, the base 1 includes at least one contact chamber 11, at least one stationary contact is fixedly installed in at least one contact chamber 11, and at least one contact support 2 is rotatably installed in at least one contact chamber 11. A first boss 14 is disposed at the bottom of the contact chamber 11, and the first boss 14 has a receiving gap with the chamber walls 12 on both sides of the contact chamber 11. The first boss 14 has a rotating shaft groove 16 on its side facing the chamber wall 12, and the opening direction of the rotating shaft groove 16 faces away from the bottom of the base 1. A first boss 14 is provided at the bottom of the contact chamber 11 of the base 1. The rotating shaft groove 16 is provided on the side of the first boss 14 facing the chamber wall 12. The first boss 14 is used to create a receiving gap with the chamber walls 12 on both sides of the contact chamber 11. The limiting plate 21 is installed in the contact chamber 11. The receiving gap is used to avoid the thickness surface of the limiting plate 21, so that the rotating shaft 22 can be installed into the rotating shaft groove 16. The thickness surface of the limiting plate 21 can also produce a good limiting effect when it is inserted into the receiving gap.

[0036] like Figures 2-4 As shown, strip-shaped slide rails 13 are provided on the two chamber walls 12 on both sides of the contact chamber 11. The strip-shaped slide rails 13 are used to make way. The back of the rotating shaft 22 protrudes from the side of the limiting plate 21 facing away from the rotating shaft 22, forming a first rotating shaft protrusion 25. The rotating shafts on both sides of the limiting plate and the first rotating shaft protrusion work together to rotate, improving reliability. The first rotating shaft protrusion 25 is slidably installed inside the strip-shaped slide rail 13 along the thickness direction of the base 1. The strip-shaped slide rail 13 on the chamber wall 12 and the rotating shaft groove 16 on the first protrusion 14 are correspondingly connected. The sliding cooperation between the strip-shaped slide rail 13 and the first rotating shaft protrusion 25 can not only limit the limiting plate 21, but also guide it, guiding the limiting plate 21 to slide smoothly into the contact chamber 11, so that the rotating shaft 22 is just inserted into the rotating shaft groove 16.

[0037] Preferred, such as Figure 4 As shown, the contact support 2 also includes a moving contact mounting component 23 and a moving contact support seat 24. After installation, the moving contact mounting component 23 and the moving contact support seat 24 limit each other. The moving contact 3 is installed between the moving contact mounting component 23 and the moving contact support seat 24. The side of the moving contact mounting component 23 facing away from the moving contact 3 is an arc-shaped surface 231. The arc-shaped surface 231 adapts to the rotation trajectory of the moving contact 3, making the rotation of the moving contact 3 smoother and more stable. The arc-shaped surface 231 is aesthetically pleasing and saves space.

[0038] Furthermore, such as Figure 4As shown, the plurality of moving contact pieces include a plurality of first moving contact pieces 31 and a second moving contact piece 32 located between the plurality of first moving contact pieces 31. The second moving contact piece 32 protrudes from the plurality of first moving contact pieces 31, that is, the length of the second moving contact piece 32 is greater than the length of the plurality of first moving contact pieces 31. In a preferred embodiment of this application, the second moving contact piece 32 is located in the middle of the plurality of first moving contact pieces 31.

[0039] Furthermore, such as Figures 1-4 As shown, after the moving contact mounting component 23 and the moving contact support base 24 are installed and limited, the two limiting plates 21 are respectively installed and fixed on both sides of the moving contact support base 24 and the moving contact mounting component 23. Preferably, the limiting plates 21 are installed and fixed to the moving contact mounting component 23 and the moving contact support base 24 respectively, so that the limiting plates 21, the moving contact mounting component 23 and the moving contact support base 24 can be fixed into a whole, which simplifies the installation method, improves installation efficiency and reduces costs. Among them, the limiting plates 21 can be fixedly connected to the moving contact mounting component 23 and / or the moving contact support base 24 by means of riveting, welding or screw fixing, but not limited to.

[0040] Preferably, one end of the limiting plate 21 includes a rotating mounting part, and the rotating shaft 22 is disposed on the rotating mounting part. When the contact support 2 is installed in the contact chamber 11, the rotating mounting parts of the limiting plates 21 on both sides first extend into the contact chamber 11. The first rotating shaft protrusion 25 of the limiting plate 21 is installed in the strip slide rail 13 of the chamber wall 12 of the contact chamber 11 and slides along the strip slide rail 13 towards the bottom of the base 1. Then, the thickness surface of the limiting plate 21 is inserted into the receiving gap between the first boss 14 and the chamber wall 12 of the contact chamber 11. The two rotating shafts 22 on the two limiting plates 21 are respectively inserted into the two rotating shaft grooves 16 spaced apart on the first boss 14, thereby limiting the contact support 2 in four linear directions: up, down, left, and right. That is, the contact support 2 can also rotate in the contact chamber 11 with the rotating shaft 22 as the rotation axis.

[0041] Furthermore, such as Figure 4 As shown, the other end of the limiting plate 21 includes a first mounting part 26, which includes at least one first mounting hole and at least one second mounting hole. The moving contact mounting member 23 has at least one first mounting protrusion on each side, and the moving contact support seat 24 has at least one second mounting protrusion on each side. The first mounting hole and the first mounting protrusion can be riveted together, and the second mounting hole and the second mounting protrusion can be riveted together.

[0042] After the limiting plates 21 on both sides of the contact support 2 are installed and fixed with the moving contact mounting part 23 and / or the moving contact support seat 24, multiple moving contact pieces can be clamped and fixed without the need to set up separate fixing elements for multiple moving contact pieces, reducing the number of parts and saving costs.

[0043] Preferred, such as Figures 1-5 As shown, the busbar connection section 4 of the contact system of the electrical switch is electrically connected to the moving contact 3. The busbar connection section 4 includes a bent and integrally formed moving contact connection part 41 and a transition mounting part 42. The moving contact connection part 41 includes the first limiting surface 44. In a preferred embodiment of this application, the bend angle between the moving contact connection part 41 and the transition mounting part 42 is a right angle. Of course, it can also be set to an acute angle or an obtuse angle according to installation needs. Figure 5 A schematic diagram of the structure of busbar connection section 4 is shown.

[0044] Furthermore, such as Figure 4 and Figure 5 As shown, multiple flexible connecting pieces 33 are fixedly electrically connected between the moving contact 3 and the busbar connection section 4. Each moving contact piece and each flexible connecting piece is fixedly connected in a one-to-one correspondence, with adjacent moving contact pieces clamping the flexible connecting piece 33. Specifically, one end of the flexible connecting piece 33 is welded to the moving contact piece, and the other end is welded to the busbar connection section 4. The flexible connecting piece 33 achieves conductivity without affecting the rotation of the moving contact 3. The length of the flexible connecting piece 33 is greater than the length of the moving contact piece. The end of the flexible connecting piece 33 away from the moving contact 3 includes a first connecting end. Multiple first connecting ends are arranged in a cross-layered, fixed connection with the end of the moving contact connection part 41. Multiple first notches 43 are spaced apart at the end of the moving contact connection part 41, and the multiple first connecting ends extend into the multiple first notches 43 for fixed connection. This design increases the contact area between the busbar connection section 4 and the moving contact 3, enhancing conductivity, while not affecting the rotation of the moving contact 3 within the contact chamber 11.

[0045] Furthermore, such as Figure 5 As shown, the end of the moving contact connection part 41 includes a plurality of support platforms spaced apart, and the first notch 43 is formed between adjacent support platforms. The two support platforms on both sides of the end of the moving contact connection part 41 include the first limiting surface 44, which is the side of the support platform facing the bottom of the base.

[0046] Furthermore, the adapter mounting section 42 includes a wire connection area and a base connection area. The base connection area is fixedly installed with the base 1. The wire connection area is used for installation and fixation with external wires. After fixed installation, the busbar connection section 4 can limit the rotating shaft 22 of the limiting plate 21 in the thickness direction of the base 1, and completely limit the rotating shaft 22 in the rotating shaft groove 16 of the base 1, so that the rotating shaft 22 can only rotate in the rotating shaft groove 16 and will not translate.

[0047] Furthermore, such as Figures 1-3As shown, at least one cylindrical boss 15 extends from the bottom of each contact chamber 11 of the base 1 toward the opening of the base 1. The side of the adapter mounting part 42 facing the cylindrical boss 15 abuts against the cylindrical boss 15, which can enhance the stability of the base 1 and the busbar connection section 4 after installation. The cylindrical boss 15 is provided with a third mounting hole and / or a third mounting protrusion. The base connection part is provided with a fourth mounting hole and / or a fifth mounting hole at the position opposite to the cylindrical boss 15. The third mounting hole and the fourth mounting hole are positioned to be installed and fixed by screws and nuts. The third mounting protrusion and the fifth mounting hole are positioned to be fixed by welding or riveting.

[0048] Furthermore, in this embodiment of the application, the wire connection area includes a sixth mounting hole. When the external wire also includes a hole-like structure, the external wire can be electrically connected and fixedly installed to the wire connection area by a combination of screws and nuts.

[0049] In the preferred embodiment of this application, such as Figures 1-3 As shown, the base 1 includes two contact chambers 11 for connection to two lines. Each contact chamber 11 includes three parallel and spaced-apart chamber walls 12. In other embodiments, the base 1 may also include three, four, or multiple contact chambers 11, with three contact chambers 11 connected to three lines, four contact chambers 11 connected to four lines, or multiple contact chambers 11 connected to multiple contact chambers 11.

[0050] It should be noted that in the description of this utility model, the terms "upper," "lower," "left," "right," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used during use. They are only for ease of description and do not indicate that the device or component referred to must have a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating relative importance.

[0051] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of the present invention, and all such modifications and substitutions should be considered within the protection scope of the present invention.

Claims

1. A contact system of an electrical switch, comprising a base (1) and at least one contact support (2), the contact support (2) being rotatably mounted on the base (1), a movable contact (3) being mounted on the contact support (2), a horizontal shaft (27) being arranged in the contact support (2), the movable contact (3) comprising a plurality of movable contact pieces stacked and spaced apart, the plurality of movable contact pieces being rotatably mounted on the horizontal shaft (27) of the contact support (2), the contact system further comprising a busbar connecting section (4) fixedly mounted on the base (1), the busbar connecting section (4) being electrically connected with the movable contact (3), a resilient member being arranged between the movable contact pieces and the contact support (2), the movable contact (3) rotating with the contact support (2) to contact or disconnect with a stationary contact in the base (1), characterized in that the contact support (2) comprising two limiting plates (21) located on both sides of the movable contact (3), the limiting plate (21) comprising a rotating shaft (22) protruding towards the movable contact (3), a first boss (14) being arranged in the base (1), the first boss (14) being provided with a rotating shaft groove (16) matched with the rotating shaft (22), the busbar connecting section (4) comprising two first limiting surfaces (44), the two first limiting surfaces (44) limiting the two rotating shafts (22) in the two rotating shaft grooves (16) respectively, so that the contact support (2) rotates around the rotating shaft (22) in the base (1).

2. Contact system of an electrical switch according to claim 1, characterized in that The first limiting surface (44) of the busbar connecting section (4) is tangent to the rotating shaft (22).

3. Contact system of an electrical switch according to claim 1, characterized in that The base (1) comprises at least one contact chamber (11), at least one stationary contact being fixedly installed in the at least one contact chamber (11) one by one, the first boss (14) being arranged at the bottom of the contact chamber (11), the first boss (14) having a containing gap with two chamber walls (12) of the contact chamber (11), the first boss (14) being provided with the rotating shaft groove (16) towards the side surface of the chamber wall (12).

4. Contact system of an electrical switch according to claim 3, characterized in that The chamber wall (12) on both sides of the contact chamber (11) is provided with a strip-shaped sliding rail (13), the back surface of the rotating shaft (22) protruding from the limiting plate (21) away from the side of the rotating shaft (22) forms a first rotating shaft protrusion (25), the first rotating shaft protrusion (25) being slidingly installed in the strip-shaped sliding rail (13) along the thickness direction of the base (1).

5. The contact system of an electrical switch according to claim 1, characterized in that, The busbar connecting section (4) comprises a movable contact connecting portion (41) and a switching mounting portion (42) integrally formed by bending, the movable contact connecting portion (41) comprising the first limiting surface (44), the movable contact further comprising a plurality of soft connecting pieces, the plurality of movable contact pieces and the plurality of soft connecting pieces being fixedly connected one by one respectively, the end of the soft connecting piece (33) away from the movable contact (3) comprising a first connecting end, the end of the movable contact connecting portion (41) being spaced apart to form a plurality of first notches (43), the plurality of first connecting ends being correspondingly inserted into the plurality of first notches (43) to be fixedly connected.

6. Contact system of an electrical switch according to claim 5, characterized in that The end of the moving contact connecting part (41) comprises a plurality of support platforms arranged at intervals, the first gap (43) is formed between adjacent support platforms, and the two support platforms on both sides of the end of the moving contact connecting part (41) comprise the first limiting surface (44), which is the surface of the support platform facing the bottom of the base.

7. The contact system of an electrical switch according to claim 5, characterized in that, The bottom of the base (1) extends at least one cylindrical boss (15) to the mouth of the base (1), and the side of the adapter mounting part (42) facing the cylindrical boss (15) abuts against at least one of the cylindrical bosses (15).

8. The contact system of an electrical switch according to claim 1, characterized in that, The contact support (2) further comprises a moving contact mounting piece (23) and a moving contact support seat (24), the moving contact (3) is mounted between the moving contact mounting piece (23) and the moving contact support seat (24), and the moving contact mounting piece (23) and the moving contact support seat (24) limit the moving contact (3), and the two limiting plates (21) are fixedly installed on both sides of the moving contact mounting piece (23) and the moving contact support seat (24).

9. Contact system of an electrical switch according to claim 8, characterized in that The side of the moving contact mounting piece (23) facing away from the moving contact (3) is an arc surface (231).

10. Contact system of an electrical switch according to claim 8, characterized in that One end of the limiting plate (21) comprises a rotating mounting part, the rotating shaft (22) is arranged on the rotating mounting part, and the other end comprises a first mounting part (26), the first mounting part (26) comprises at least one first mounting hole and at least one second mounting hole, at least one first mounting protrusion is arranged on both sides of the moving contact mounting piece (23), at least one second mounting protrusion is arranged on both sides of the moving contact support seat (24), the first mounting hole and the first mounting protrusion are fixedly connected, and the second mounting hole and the second mounting protrusion are fixedly connected.

Images