A power switch

Abstract

The utility model relates to a kind of power switch, including handle, upper cover, pedestal, moving contact and two isolated static contacts, the static contact includes fixedly connected on the terminal stud of pedestal, static contact point is set on the terminal stud top, the terminal stud and static contact point are turning integral molding structure;The moving contact includes the moving contact plate of relative to the sliding arrangement of pedestal and the two moving contact points of setting in the moving contact plate bottom, the moving contact point and moving contact plate are stamping integral molding structure;The handle is contacted or separated by transmission component control moving contact point on moving contact plate and corresponding static contact point.Adopt above technical scheme, the utility model is turning integral molding by static contact point and terminal stud and stamping integral molding by moving contact point and moving contact plate, the structure of integral molding all need not welding fixed, overall process is simple, avoid the problem that contact point is not firmly combined and leads to drop, and connection place resistance is stable.

Description

Technical Field

[0001] This utility model belongs to the field of switch technology, and in particular relates to a power switch. Background Technology

[0002] Currently, the main power switch in the industry typically uses a separate structure for its moving and stationary contacts. That is, the moving and stationary contacts are first processed separately and then fixed to the actuators such as the moving contact plate and terminal block by welding or other methods.

[0003] The above-mentioned process of fixing contacts by welding has the following main drawbacks: First, the production process is complex, with the addition of welding steps, resulting in numerous production steps, low efficiency, and high labor and material costs; second, welding quality is difficult to control precisely, and defects such as pores and cavitation are easily generated in the welding area, leading to weak contact bonding, risk of detachment, and significantly increased contact resistance, reducing the conductivity and current carrying capacity of the switch; third, when the switch carries a large current, the local high temperature caused by the increased contact resistance can easily cause the contacts to stick together, seriously affecting the service life and operational reliability of the switch. Utility Model Content

[0004] The purpose of this utility model is to overcome the defects of the prior art by providing a power switch that solves the problem of the power switch contacts sticking together when a large current passes through.

[0005] The technical solution of this utility model is as follows: A power switch includes a handle, a top cover, a base, a moving contact disposed within the base, and two isolated stationary contacts. The top cover is connected to the base and forms a cavity. The stationary contact includes a terminal fixedly connected to the base, with the top end of the terminal inside the base and the bottom end extending outside the base. A stationary contact point is disposed on the top end of the terminal. The terminal and the stationary contact point are integrally formed by machining. The moving contact includes a moving contact plate slidably disposed relative to the base and two moving contacts disposed at the bottom of the moving contact plate. The moving contacts and the moving contact plate are integrally formed by stamping. A transmission assembly is disposed within the cavity. The handle controls the moving contacts on the moving contact plate to contact or separate from the corresponding stationary contacts through the transmission assembly.

[0006] By adopting the above technical solution, the stationary contact and the terminal block are machined into one piece, and the moving contact and the moving contact plate are stamped into one piece. The one-piece structure does not require welding for fixation, the overall process is simple, and the problem of contact detachment due to weak connection is avoided. At the same time, the resistance at the connection is stable, and the situation of local high temperature caused by increased resistance is avoided when subjected to large current. This avoids the problem of contact adhesion and ensures the service life and operation reliability of the switch.

[0007] Further features of this invention: The transmission assembly includes a spring seat, a slider, and a return spring. The bottom of the handle extends into the upper cover and is connected to the slider via transmission. The slider is driven by the handle to rotate within the upper cover. The spring seat is slidably disposed in the cavity. Vertical holes for a moving contact plate are provided on the left and right sides of the spring seat. A pressure spring is disposed in the vertical hole. One end of the pressure spring abuts against the upper surface of the vertical hole, and the other end presses the moving contact plate against the lower surface of the vertical hole. A ring-shaped protrusion is provided on the top of the spring seat. The top end face of the protrusion is a curved surface that undulates regularly along the circumference. The curved surface is abutted against the bottom of the slider by the pressure spring. The two ends of the return spring abut against the bottom of the spring seat and the bottom surface of the cavity, respectively.

[0008] With the above-mentioned further configuration, the return spring pushes the curved surface to abut against the bottom surface of the slider. At the same time, the undulating configuration of the curved surface converts the rotation of the handle and the slider into the linear motion of the spring seat in the cavity. Meanwhile, the pressure spring acts as an intermediate component to ensure that the moving contact plate abuts against the lower surface of the vertical hole, ensuring that the moving contact plate moves linearly with the spring seat. Together with the return spring, the moving contact plate moves closer to or away from the stationary contact, realizing the contact or separation of the moving contact with the corresponding stationary contact.

[0009] A further feature of this invention is that the handle is fixedly connected to the slider, the top of the cavity is provided with a countersunk surface, and the top of the slider rests against the countersunk surface.

[0010] With the above-mentioned further configuration, the slider rests against the countersunk surface to achieve positioning of the slider within the cavity, facilitating the assembly of the handle and the slider within the cavity. During operation, the slider is pressed against the countersunk surface by the return spring, so that it is constrained within the cavity under the pressure of the spring seat, preventing it from detaching outward.

[0011] A further feature of this invention is that the curved surface includes peaks and troughs, which are alternately arranged on the curved surface, and the surface connecting the peaks and troughs is a smooth transition surface.

[0012] With the above-mentioned further settings, the peaks on the curved surface are used as the high position and the troughs as the low position, and the transition surface is set smoothly, so that the slider can smoothly switch between the high and low positions, and smoothly realize the movement of the spring seat in the cavity.

[0013] A further improvement of this invention is that the bottom of the slider is provided with a plurality of abutting parts that abut against the curved surface. The number of crests and troughs is the same. When the slider rotates, all abutting parts abut against all crests or all troughs at the same time. The bottom surface of the abutting parts is an arc surface. Arc-shaped grooves adapted to the arc surface are provided on the crests and troughs.

[0014] With the above-mentioned further design, when the handle is rotated and the contact part moves to the crest or trough, its arc surface enters the corresponding arc-shaped groove. When the arc surface slides out of the arc-shaped groove, it has greater resistance, so that the handle and slider can be in a stable and balanced state when the contact part contacts the high and low points of the curved surface, and remain locked. This provides a clear sense of the open and closed position, allowing the operator to clearly perceive whether the rotation is in place by hand. At the same time, when the bottom of the slider is at the high position of the curved surface, the spring seat moves down to the low point, and the moving contact and the stationary contact make contact and conduct. When the handle is not rotated to the right position, under the action of the smooth transition curved surface, it slides into the arc-shaped groove at the trough, and the moving contact and the stationary contact are in a disconnected state, avoiding accidental operation that could cause them to conduct.

[0015] A further feature of this invention is that: a strip-shaped column protrudes from the inner wall of the base, the strip-shaped column is distributed on the front and rear sides of the left and right ends of the movable contact plate, and the strip-shaped column is clearance-fitted with the side of the movable contact plate; protrusions are provided on the front and rear end faces of the movable contact plate, and the protrusions are distributed on the left and right sides of the spring seat.

[0016] With the above-mentioned further configuration, the strip column and the side of the moving contact plate are fitted with a clearance to prevent the left and right ends of the moving contact plate from swinging in the front and back directions. Similarly, the protrusion is set so that when the left and right ends of the moving contact plate swing in the up and down directions, they contact the side wall of the spring seat to realize the swing limit of the left and right ends of the moving contact plate, ensuring that the two ends of the moving contact plate can also move linearly up and down with the spring seat, thus ensuring the stability of the linear movement of the moving contact.

[0017] A further feature of this invention is that a sealing ring is provided at the connection between the top cover and the base, an O-ring is provided between the handle and the inner wall of the top cover, a sealing plug is fitted at the opening at the top of the top cover, and the handle passes through the sealing plug and rotates relative to it.

[0018] By further implementing the above-mentioned design, the sealing ring and O-ring are used to seal the cavity, preventing external dust, moisture and other contaminants from entering. The O-ring acts as a dynamic seal, and a sealing plug is placed outside the O-ring as a barrier to fill the space at the handle and top cover opening, further protecting the sliding part of the O-ring and ensuring smooth sliding.

[0019] A further feature of this invention is that a protective sleeve is fitted over the sealing plug, and the upper cover has a stepped surface. One end of the protective sleeve rests against the stepped surface, and the other end is snapped into the handle located on the outer side of the upper cover. The protective sleeve and the stepped surface are slidably arranged relative to each other.

[0020] With the above-mentioned further configuration, the protective sleeve is fixedly installed on the handle, with its bottom abutting against the stepped surface as a positioning surface to ensure the accurate installation of the handle and slider. Together with the countersunk surface, it constrains and restricts the handle and slider in the vertical direction to prevent the static and moving contacts from accidentally touching due to vertical shaking.

[0021] A further feature of this invention is as follows: a guide strip protrudes from the side of the spring seat, and a strip groove adapted to the guide strip is provided on the inner wall of the upper cover. The guide strip slides in the strip groove. A guide groove is also provided on the side of the spring seat, and a limiting post adapted to the guide groove is provided on the inner wall of the base. The limiting post slides in the guide groove.

[0022] With the above-mentioned further configuration, the guide strip and guide groove on the spring seat cooperate with the strip groove located on the inner wall of the upper cover in the cavity and the limiting post located on the inner wall of the base in the cavity, respectively, to play a positioning and guiding role in the assembly and movement of the spring seat.

[0023] A further feature of this invention is that threaded inserts are embedded on both sides of the base, and an opening is provided on the outer surface of the upper cover for the top of the threaded inserts to be exposed.

[0024] With the above-mentioned further configuration, the threaded insert is fixed on the base. After the bolt is screwed into the threaded insert, the bolt head presses against the upper surface of the cover to complete the locking of the cover and the base. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure of a specific embodiment of the present utility model; Figure 2 This is a top view of a specific embodiment of the present utility model; Figure 3 for Figure 2 Schematic diagram of the cross section at point AA; Figure 4 for Figure 2 Schematic diagram of the cross section at point BB; Figure 5 This is a schematic diagram of the overall structure of the spring seat in a specific embodiment of this utility model; Figure 6 This is a schematic diagram of the structure of the spring seat and the moving contact plate in the base in a specific embodiment of this utility model; Figure 7 This is a schematic diagram of the overall structure of the base in a specific embodiment of this utility model; Figure 8 This is a schematic diagram of the overall structure of the upper cover in a specific embodiment of the present utility model; Figure 9 This is a schematic diagram of the overall structure of the slider in a specific embodiment of this utility model; Figure 10 This is a schematic diagram of the overall structure of the stationary contact in a specific embodiment of the present utility model; Figure 11 This is a schematic diagram of the overall structure of the moving contact in a specific embodiment of this utility model.

[0026] In the diagram: 1. Handle; 2. Top cover; 21. Stepped surface; 22. Strip groove; 23. Countersunk surface; 3. Base; 31. Strip post; 32. Limiting post; 4. Stationary contact; 41. Terminal post; 42. Stationary contact point; 5. Moving contact; 51. Moving contact plate; 52. Moving contact point; 53. Protrusion; 6. Spring seat; 61. Circular groove; 62. Protrusion; 621. Curved surface; 622. Crest; 623. Trough; 63. Vertical hole; 64. Guide groove; 65. Guide strip; 7. Slider; 72. Abutment part; 8. Pressure spring; 9. Return spring; 10. Sealing ring; 11. O-ring; 12. Sealing plug; 13. Protective sleeve; 14. Cavity; 15. Threaded insert. Detailed Implementation

[0027] The technical solutions in this embodiment will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0028] It should be noted that in the description of this utility model, all directional indicators (such as up, down, forward, backward, etc.) are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0029] Furthermore, in this utility model, the use of terms such as "first," "second," etc., is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. In the description of this utility model, "a number" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0030] Furthermore, the technical solutions of the various embodiments of this utility model can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0031] like Figure 1-11As shown, a power switch includes a handle 1, a top cover 2, a base 3, a moving contact 5 disposed in the base 3, and two isolated stationary contacts 4. The top cover 2 is connected to the base 3 and forms a cavity 14. A sealing ring 10 is sealed at the connection between the top cover 2 and the base 3. One end of the handle 1 is a handle located above the top cover 2, and the other end of the handle 1 extends into the cavity 14 through the inlet of the top cover 2. An O-ring 11 is sealed between the handle 1 and the inner wall of the cavity 14. The O-ring 11 is dynamically sealed, so the switch in this embodiment is in a sealed state on the outside, which can effectively prevent dust, moisture and other contaminants from entering. In this embodiment, a sealing plug 12 is fitted at the opening at the top of the top cover 2 to further protect the O-ring 11. At the same time, the handle 1 passes through the sealing plug 12 and rotates relative to it.

[0032] Each stationary contact 4 includes a terminal 41 fixedly connected to the base 3. The top end of the terminal 41 is inside the base 3, and the bottom end extends out of the base 3 for connection to external wires. The part of the terminal 41 extending out of the base 3 is set as a threaded post structure, which can be press-fitted with wires by matching non-metallic insert hexagonal flange nuts. A stationary contact 42 is provided on the top end of the terminal 41. The terminal 41 and the stationary contact 42 are machined into one piece. The moving contact 5 includes a moving contact plate 51 and two moving contacts 52 disposed at the bottom of the moving contact plate 51. The moving contact plate 51 is slidably disposed relative to the base 3. The moving contacts 52 are distributed on the bottom surfaces at both ends of the moving contact plate 51 and correspond to the stationary contacts 42 at the top of the two terminals 41, respectively. The moving contacts 52 and the moving contact plate 51 are integrally formed by stamping. It should be noted that in this embodiment, the stationary contacts 42 are planar silver dot structures, and the moving contacts 52 are spherical silver dot structures.

[0033] A transmission assembly is also provided inside the cavity 14. The transmission assembly includes a spring seat 6, a slider 7, a pressure spring 8, and a return spring 9. The bottom of the handle 1 extends into the upper cover 2 and is connected to the slider 7 in a transmission manner. In this embodiment, the two are fixedly connected. The bottom of the handle 1 is locked in the groove at the top of the slider 7 by a screw. The slider 7 rotates inside the upper cover 2. The top of the cavity 14 is provided with a countersunk surface 23, which is located in the inner cavity of the upper cover 2. The top of the slider 7 rests on the countersunk surface 23. During assembly, the slider 7 can be positioned inside the cavity 14, which facilitates the assembly of the handle 1 and the slider 7 inside the cavity 14.

[0034] The spring seat 6 is slidably disposed in the cavity 14: a guide strip 65 protrudes circumferentially from the side of the spring seat 6, and a strip groove 22 adapted to the guide strip 65 is provided on the inner wall of the upper cover 2, and the guide strip 65 is constrained to slide in the strip groove 22; a guide groove 64 is also provided on the side of the spring seat 6, and a limiting post 32 adapted to the guide groove 64 is provided on the inner wall of the base 3, and the limiting post 32 slides in the guide groove 64, wherein the guide strip 65, the guide groove 64, the strip groove 22 and the limiting post 32 all extend along the direction in which the handle 1 is inserted into the cavity 14.

[0035] The top of the spring seat 6 is provided with a circular groove 61 for the slider 7 to be inserted. The bottom of the circular groove 61 protrudes towards the side closer to the slider 7 and is provided with a ring-shaped protrusion 62. The top end face of the protrusion 62 is a curved surface 621 with regular circumferential undulations. The curved surface 621 includes peaks 622 and troughs 623. The peaks 622 and troughs 623 are alternately arranged on the curved surface 621. The surface connecting the peaks 622 and troughs 623 is a smooth transition surface. The curved surface 621 is pressed against the bottom of the slider 7 by a pressure spring 8. The bottom of the slider 7 is provided with a number of abutting parts 72 that abut against the curved surface 621. The number of peaks 622 and troughs 623 is the same. In this embodiment, there are two abutting parts 72, two peaks 622, and two troughs 623. When the slider 7 rotates, all abutting parts 72 abut against all peaks 622 or all troughs 623 at the same time. The left and right sides of the middle part of the spring seat 6 are provided with vertical holes 63 for passing through the movable contact plate 51. The pressure spring 8 is disposed in the vertical hole 63. One end of the pressure spring 8 abuts against the upper surface of the vertical hole 63, and the other end abuts against the movable contact plate 51 against the lower surface of the vertical hole 63. A return spring 9 is provided on the lower side of the bottom of the spring seat 6, and the two ends of the return spring 9 abut against the bottom end face of the spring seat 6 and the bottom surface of the cavity 14, respectively.

[0036] It should be noted that the top surface of the vertical hole 63 and the upper surface of the moving contact plate 51 have protruding positioning post structures for positioning and fitting the pressure spring 8. The bottom of the spring seat 6 is provided with a groove for accommodating the positioning and reset spring 9, and the bottom surface of the cavity 14 has protruding positioning post structures for fitting the positioning and reset spring 9.

[0037] The transmission assembly utilizes a return spring 9 to press and push the curved surface 621 to abut against the contact part 72. The curved surface 621 is undulating, so when the handle 1 is rotated, the contact part 72 switches between abutting on the crests 622 and troughs 623. The crests 622 and troughs 623 have a height difference, and the top of the cavity 14 is provided with a countersunk surface 23. The top of the slider 7 abuts against the countersunk surface 23 and cannot move backward. Thus, the rotation of the slider 7 is converted into the linear movement of the spring seat 6 in the cavity 14. At the same time, the pressure spring 8 acts as an intermediate pressure component to ensure that the moving contact plate 51 abuts against the lower surface of the vertical hole 63, ensuring that the moving contact plate 51 moves linearly with the spring seat 6, thereby realizing the contact or separation of the moving contact 52 and the corresponding stationary contact 42.

[0038] Specifically, after the abutting part 72 of the slider 7 rotates from the abutting trough 623 to the abutting crest 622, the spring seat 6 slides away from the handle 1, at which time the return spring 9 is squeezed, and the pressure spring 8 maintains pressure at both ends, keeping the moving contact plate 51 against the lower surface of the vertical hole 63. Therefore, the moving contact plate 51 and the spring seat 6 move together, so that the two moving contacts 52 simultaneously contact the two corresponding stationary contacts 42. After the abutting part 72 of the slider 7 rotates from the abutting crest 622 to the abutting trough 623, since the spring seat 6 cannot rotate in the cavity 14, the spring seat 6 slides towards the handle 1 under the push of the return spring 9 and abuts against the bottom of the slider 7. At the same time, the moving contact plate 51 and the spring seat 6 move together, so that the two moving contacts 52 simultaneously separate from the two corresponding stationary contacts 42.

[0039] Furthermore, in this embodiment, the bottom surface of the abutment 72 is an arc surface, and both the crest 622 and the trough 623 are provided with arc-shaped grooves adapted to the arc surface. When the handle 1 is rotated, the abutment 72 moves to the crest 622 or the trough 623, and its arc surface enters the corresponding arc-shaped groove. When the arc surface slides out of the arc-shaped groove, it has greater resistance, so that the handle 1 and the slider 7 can be in a stable and balanced state and remain locked when the abutment 72 contacts the high point and low point of the curved surface. This provides a clear sense of the open and closed position, allowing the operator to clearly perceive whether the rotation is in place by hand. At the same time, when the bottom of the slider 7 is at the high position of the curved surface 621, the spring seat 6 moves down to the low point, and the moving contact 52 contacts the stationary contact 42 to conduct. When the handle 1 is not rotated to the right position, under the action of the smooth transition curved surface, it slides into the arc-shaped groove of the trough 623, and the moving contact 52 and the stationary contact 42 are in a disconnected state, avoiding accidental operation that could cause them to conduct.

[0040] In this embodiment, a strip column 31 protrudes from the inner wall of the base 3. The strip column 31 is distributed on the front and rear sides of the left and right ends of the movable contact plate 51. The strip column 31 is in clearance fit with the side of the movable contact plate 51. A protrusion 53 is provided on both the front and rear end surfaces of the movable contact plate 51. The protrusion 53 is distributed on the left and right sides of the spring seat 6.

[0041] The strip column 31 and the side clearance of the movable contact plate 51 prevent the left and right ends of the movable contact plate 51 from swinging in the front and back directions. Similarly, the protrusion 53 is set so that when the left and right ends of the movable contact plate 51 swing in the up and down directions, it contacts the side wall of the spring seat 6, thereby limiting the swing of the left and right ends of the movable contact plate 51 and ensuring that the two ends of the movable contact plate 51 can also move linearly up and down with the spring seat 6, thus ensuring the stability of the linear movement of the movable contact 52.

[0042] In this embodiment, a protective sleeve 13 is provided on the outside of the sealing plug 12, and the upper cover 2 is provided with a stepped surface 21. One end of the protective sleeve 13 abuts against the stepped surface 21, and the other end is snapped into the bottom of the handle 1 located above the upper cover 2. The protective sleeve 13 is slidably disposed relative to the stepped surface 21 and can rotate relative to it. The bottom of the protective sleeve 13 abuts against the stepped surface 21 as a support and positioning surface to ensure the accurate installation of the handle 1 and the slider 7. Together with the countersunk surface 23, it constrains and restricts the handle 1 and the slider 7 in the vertical direction to prevent the vertical shaking from causing the static contact and the moving contact to be accidentally touched.

[0043] Threaded inserts 15 are embedded on both sides of the base 3. The outer surface of the upper cover 2 is provided with an opening for the top of the threaded inserts 15 to be exposed. The threaded inserts 15 are fixed on the base 3. After the bolt is screwed into the threaded inserts 15, the bolt head presses against the upper surface of the upper cover 2 to complete the locking of the upper cover 2 and the base 3.

[0044] Specifically, in this embodiment, the stationary contact 42 and the terminal block 41 are machined into one piece, and the moving contact 52 and the moving contact plate 51 are stamped into one piece. The one-piece structure does not require welding for fixation, and the overall process is simple. This avoids the problem of contact detachment due to weak contact bonding. At the same time, the resistance at the connection is stable. When subjected to large current, it avoids the situation of increased resistance leading to local high temperature. This avoids the problem of contact adhesion and ensures the service life and operation reliability of the switch.

Claims

1. A power switch, comprising a handle (1), a top cover (2), a base (3), a moving contact (5) disposed within the base (3), and two isolated stationary contacts (4), wherein the top cover (2) is connected to the base (3) and forms a cavity (14), characterized in that, The stationary contact (4) includes a terminal (41) fixedly connected to the base (3). The top end of the terminal (41) is inside the base (3) and the bottom end extends out of the base (3). A stationary contact (42) is provided on the top end of the terminal (41). The terminal (41) and the stationary contact (42) are machined into one piece. The moving contact (5) includes a moving contact plate (51) that is slidably disposed relative to the base (3) and two moving contacts (52) disposed at the bottom of the moving contact plate (51). The moving contacts (52) and the moving contact plate (51) are integrally formed by stamping. A transmission assembly is provided inside the cavity (14), and the handle (1) controls the moving contact (52) on the moving contact plate (51) to contact or separate from the corresponding stationary contact (42) through the transmission assembly.

2. A power switch according to claim 1, characterized in that, The transmission assembly includes a spring seat (6), a slider (7), and a return spring (9). The bottom of the handle (1) extends into the upper cover (2) and is connected to the slider (7) in a transmission manner. The slider (7) is driven by the handle (1) to rotate within the upper cover (2). The spring seat (6) is slidably disposed in the cavity (14). The left and right sides of the spring seat (6) are provided with vertical holes (63) for passing through the moving contact plate (51). A pressure spring (8) is disposed in the vertical hole (63). One end of the pressure spring (8) abuts against the upper surface of the vertical hole (63), and the other end abuts against the moving contact plate (51) on the lower surface of the vertical hole (63); the top of the spring seat (6) is provided with a protrusion (62) in the shape of a ring, and the top end face of the protrusion (62) is a curved surface (621) with regular undulation along the circumference, and the curved surface (621) is abutted against the bottom of the slider (7) by the pressure spring (8); the two ends of the reset spring (9) abut against the bottom of the spring seat (6) and the bottom surface of the cavity (14) respectively.

3. A power switch according to claim 2, characterized in that, The top of the cavity (14) is provided with a countersunk surface (23), and the top of the slider (7) abuts against the countersunk surface (23).

4. A power switch according to claim 2 or 3, characterized in that, The curved surface (621) includes peaks (622) and troughs (623), which are alternately arranged on the curved surface (621), and the surface connecting the peaks (622) and troughs (623) is a smooth transition surface.

5. A power switch according to claim 4, characterized in that, The bottom of the slider (7) is provided with a number of abutting parts (72) that abut against the curved surface (621). The number of crests (622) and troughs (623) is the same. When the slider (7) rotates, all abutting parts (72) abut against all crests (622) or all troughs (623) at the same time. The bottom surface of the abutting part (72) is an arc surface. Both the crests (622) and troughs (623) are provided with arc-shaped grooves that are adapted to the arc surface.

6. A power switch according to claim 2, characterized in that, The inner wall of the base (3) has a protruding strip column (31), which is distributed on the front and rear sides of the left and right ends of the movable contact plate (51). The strip column (31) is in clearance fit with the side of the movable contact plate (51). The front and rear ends of the movable contact plate (51) are provided with protrusions (53), which are distributed on the left and right sides of the spring seat (6).

7. A power switch according to claim 6, characterized in that, A sealing ring (10) is provided at the connection between the upper cover (2) and the base (3). An O-ring (11) is provided between the handle (1) and the inner wall of the upper cover (2). A sealing plug (12) is fitted at the opening at the top of the upper cover (2). The handle (1) passes through the sealing plug (12) and rotates relative to it.

8. A power switch according to claim 7, characterized in that, The sealing plug (12) is covered with a protective sleeve (13), and the upper cover (2) is provided with a stepped surface (21). One end of the protective sleeve (13) abuts against the stepped surface (21), and the other end is snapped into the handle (1) located on the outer part of the upper cover (2). The protective sleeve (13) and the stepped surface (21) are slidably arranged relative to each other.

9. A power switch according to claim 6, characterized in that, The spring seat (6) has a guide strip (65) protruding from its side. The inner wall of the upper cover (2) is provided with a strip groove (22) that matches the guide strip (65). The guide strip (65) slides in the strip groove (22). The spring seat (6) also has a guide groove (64) on its side. The inner wall of the base (3) is provided with a limiting post (32) that matches the guide groove (64). The limiting post (32) slides in the guide groove (64).

10. A power switch according to claim 1, characterized in that, The base (3) has threaded inserts (15) embedded on both sides, and the outer surface of the top cover (2) has an opening for the top of the threaded inserts (15) to be exposed.

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