Large-current switch moving and static contact separation anti-pull arc method, static contact group and switch
By suspended assisted contacts between the static contacts of the large current switch and the dynamic contact point, the rebound movement is used to avoid the phenomenon of pulling the arc, which solves the arc problem caused by the slow movement speed when the movement is separated, and improves the switch. Use safety and life.
Patent Information
- Application Number
- CN202411975365.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-31
- Publication Date
- 2025-01-28
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
When the dynamic contacts are separated, high-current switches are prone to arc drawing due to the slow movement of the dynamic contacts, which leads to burns and oxide scales, affects the conductivity, shortens the service life and ignites the risk of fire.
A auxiliary contact between the static contact and the movement contact point, the auxiliary contact elastic setting is set above the static contact and the static terminal is kept with the static terminal. Static contact resistance, acceleration movement movement during disconnection, the auxiliary contact rebound maintains the replacement, and quickly separate to avoid pulling the arc.
Through the rebound movement of the auxiliary contact, maintain the informant relationship between the contact and the static end, avoid generating arcs between the contact and static contacts, protect the safety of the contacts and conductive performance, and extend the service life and safety of the switch.
Smart Images
Figure CN119381186A_ABST
Abstract
Description
Technical Field
[0001] The invention belongs to the technical field of switches, and in particular relates to a method for separating moving and static contacts of a large current switch to resist arcing, a static contact group and a switch. Background Art
[0002] Due to the large overcurrent of high-current switches, the moving terminals, moving contact pieces, moving contacts, static contacts, and static terminals inside are all made of conductive materials with large cross-sectional areas. This causes the static terminals to lose their elasticity. When the moving contacts and static contacts are separated, the movement speed of the moving contact will change from slow to fast. In the initial stage of separation, the moving contact moves slowly, so an arc is easily generated between the moving and static contacts when it is separated from the static contact. This is commonly known as arcing. The generated arc will burn the moving contact and static contact, causing oxide scale to appear on the surface of the moving and static contacts, affecting the conductive properties of both, resulting in a shortened service life of the switch, and even a risk of fire. Summary of the invention
[0003] The first technical problem to be solved by the present invention is to provide a method for resisting arcing when moving and static contacts of a large current switch are separated, so as to solve the technical problem of arcing caused by slow moving speed of the moving contact when moving and static contacts of a conventional large current switch are separated.
[0004] In order to solve the above technical problems, the technical solution adopted by the present invention is: a method for separating the moving and static contacts of a large current switch to resist arcing, wherein an auxiliary contact is suspended between the static contact and the moving contact, the auxiliary contact is elastically arranged above the static contact and keeps conduction with the static terminal, and when the moving contact is to be conducted with the static contact, the auxiliary contact is pressed to abut against the static contact, so as to achieve abutment and conduction among the moving contact, the auxiliary contact and the static contact, and when the moving contact is to be disconnected from the static contact, the moving contact accelerates in a direction away from the static contact, and the auxiliary contact relies on the rebound force to maintain abutment with the moving contact when the moving contact is disconnected at a low speed, so as to maintain the conduction relationship between the moving contact and the static terminal, and when the auxiliary contact rebounds into place, the moving contact enters a high-speed movement stage and is quickly separated from the auxiliary contact.
[0005] The present invention further aims to solve the technical problem of providing an arc-resistant static contact group for a high-current switch, which solves the technical problem of arcing caused by the slow movement speed of the moving contact when the moving and static contacts of a conventional high-current switch are separated.
[0006] In order to solve the above technical problems, the technical solution adopted by the present invention is: an arc-resistant high-current switch static contact group, including a static terminal and a static contact fixedly connected to the static terminal, and also including an auxiliary contact arranged opposite to the static contact. The auxiliary contact is connected to the static terminal through a spring sheet. In the absence of external force, the elastic force of the spring sheet keeps the auxiliary contact and the static contact separated. When the switch is closed, the auxiliary contact abuts against the static contact under the pressure of the moving contact to be connected.
[0007] As a preferred solution, the current conducting cross-section of the static terminal is larger than the current conducting cross-section of the spring.
[0008] A further technical problem to be solved by the present invention is to provide an arc-resistant high-current switch to solve the technical problem that traditional high-current switches are prone to arcing, resulting in low safety and short life.
[0009] In order to solve the above technical problems, the technical solution adopted by the present invention is: an arc-resistant high-current switch, comprising a shell, a static contact group, a moving contact group and a driving mechanism arranged in the shell, characterized in that the static contact group is the static contact group of the arc-resistant high-current switch according to claim 2 or 3, the moving contact group comprises a moving terminal fixedly connected in the shell, a moving contact piece swingably connected to the moving terminal with the moving terminal as a fulcrum, a moving contact fixedly connected to one end of the moving contact piece and facing the auxiliary contact of the static contact group, the driving mechanism comprises a handle slidably connected to the shell and one end extending out of the shell, a sliding rod elastically connected to the handle and driven by the handle to move along the moving contact piece, the lower end of the sliding rod abuts against the moving contact piece, the handle drives the sliding rod to move back and forth on both sides of the swing fulcrum of the moving contact piece, driving the moving contact piece to swing to realize the closing and opening of the switch.
[0010] The cam is an angular movement of the cam which is engaged with the step of moving the cam and the step of moving the cam in a direction opposite to that of the cam, the cam being arranged on a platform so that the cam can move relative to the moving element.
[0011] As a preferred solution, one end of the swing block close to the swing opening is an arc surface bent along the sliding direction of the handle, the inner walls of the linkage box on both sides of the swing opening are concave arc surfaces matching the arc surfaces of the swing block, and the width of the swing opening along the sliding direction of the handle is smaller than the width of the swing block.
[0012] As a preferred solution, the shell includes a base and a cover body that are matched to each other, and a long hole is opened on the cover body. One end of the handle passes through the long hole and extends out of the cover body. Leaf springs are respectively connected to both sides of the handle, and the two leaf springs are respectively abutted against the inner walls of the cover body on both sides. Protrusions are symmetrically arranged on the inner walls of the cover body on both sides. When the leaf spring slides over the protrusions, the user who pushes the handle to slide feels a sense of frustration, and the handle is locked in this position to maintain the open or closed state of the switch.
[0013] As a preferred solution, a dustproof plate is sleeved on the dial handle, and the dustproof plate is in contact with the inner wall of the cover body with the long hole. The dustproof plate slides with the dial handle and blocks the empty area of the long hole.
[0014] As a preferred embodiment, one end of the moving terminal is a supporting portion, which serves as a fulcrum of the moving contact piece and is used to support the moving contact piece. A U-shaped compression spring is connected to the supporting portion, and the open end of the compression spring faces the end of the supporting portion. The two side walls of the compression spring extend toward the end of the supporting portion and are arranged on both sides of the moving contact piece. The two side walls of the compression spring are elastically pressed inward and downward on both sides of the moving contact piece, so that the moving contact piece is stably abutted against the supporting portion.
[0015] As a preferred solution, a magnet is further connected to the inner wall of the housing, and the magnet is located on one side of the auxiliary contact.
[0016] The beneficial effects of the present invention are as follows: the present invention arranges an auxiliary contact between the moving and static contacts, and utilizes the rebound motion of the auxiliary contact to enable the moving contact to maintain a conductive relationship with the auxiliary contact in the slow moving stage at the initial stage of disconnection, that is, to maintain a conductive relationship between the moving contact and the static terminal. This process can avoid the generation of an arc between the moving contact and the auxiliary contact. When the auxiliary contact returns to the initial position, the moving contact has passed the slow moving stage and entered the high-speed moving stage, so that it can quickly move away from the auxiliary contact, avoiding the generation of an arc when the moving contact and the auxiliary contact are separated, thereby protecting the safety and high conductivity of each contact, and extending the safety and service life of the switch. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] The specific embodiments of the present invention are further described in detail below with reference to the accompanying drawings, wherein: Figure 1 is a schematic diagram of the three-dimensional structure of the static contact group of the large current switch described in Example 1; Figure 2 is a three-dimensional structural exploded diagram of the arc-resistant high-current switch described in Example 2; Figure 3 is a cross-sectional view of the arc-resistant high-current switch described in Example 2; Figure 4 is an exploded view of the assembly structure of the linkage box and the swing block described in Example 2; Figure 5 is an exploded view of the assembly structure of the cover body, the dial handle and the linkage box described in Example 2; Figure 6 is a schematic diagram of the assembly structure of the moving contact piece described in Example 2; Figure 7 is a cross-sectional view of the assembly structure of the linkage box and the swing block described in Example 2; Figure 1 to Figure 7 In: 1. Shell; 101. Base; 102. Cover; 2. Static contact group; 201. Static terminal; 202. Static contact; 203. Auxiliary contact; 204. Spring; 3. Moving terminal; 301. Support; 4. Moving contact; 5. Moving contact; 6. Handle; 7. Slide bar; 8. Linkage box; 9. Swing opening; 10. Swing block; 11. Mounting hole; 12. Spring; 13. Spring leaf; 14. Bump; 15. Groove; 16. Arc surface; 17. Concave arc surface; 18. Long hole; 19. Leaf spring; 20. Protrusion; 21. Dustproof plate; 22. Compression spring; 23. Magnet. DETAILED DESCRIPTION
[0018] The specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. Example 1
[0019] like Figure 1 The arc-resistant high-current switch static contact group shown includes a static terminal 201 and a static contact 202 fixedly connected to the static terminal 201, and also includes an auxiliary contact 203 arranged opposite to the static contact 202. The auxiliary contact 203 is connected to the static terminal 201 through a spring sheet 204. In the absence of external force, the elastic force of the spring sheet 204 keeps the auxiliary contact 203 and the static contact 202 separated. When the switch is closed, the auxiliary contact 203 abuts against the static contact 202 under the pressure of the moving contact 5 to be conductive.
[0020] In this embodiment, the current conducting cross-section of the static terminal 201 is larger than the current conducting cross-section of the spring 204 .
[0021] The working principle of the arc-resistant high-current switch static contact group described in this embodiment refers to Example 3. Example 2
[0022] like Figure 2~Figure 7The illustrated embodiment of an arc-resistant high-current switch comprises a housing 1, a stationary contact group 2, a moving contact group and a driving mechanism arranged in the housing 1, the stationary contact group 2 being the stationary contact group of the arc-resistant high-current switch according to claim 2 or 3, the moving contact group comprising a moving terminal 3 fixedly connected in the housing 1, a moving contact piece 4 swingably connected to the moving terminal 3 with the moving terminal 3 as a fulcrum, a moving contact 5 fixedly connected to one end of the moving contact piece 4 and directly facing the auxiliary contact 203 of the stationary contact group 2, the driving mechanism comprising a dial handle 6 slidably connected to the housing 1 and with one end extending out of the housing 1, a slide bar 7 elastically connected to the dial handle 6 and driven by the dial handle 6 to move along the moving contact piece 4, the lower end of the slide bar 7 abuts against the moving contact piece 4, the dial handle 6 can slide on the housing 1 along the length direction of the moving contact piece 4, the dial handle 6 drives the slide bar 7 to move back and forth on both sides of the swing fulcrum of the moving contact piece 4, and drives the moving contact piece 4 to swing to realize the closing and opening of the switch.
[0023] As an improvement to the above technical solution, the driving mechanism described in this embodiment also includes a linkage box 8 slidably arranged in the housing 1, and a swing opening 9 is provided at one end of the linkage box 8 facing the movable contact piece 4. A swing block 10 is provided inside the linkage box 8, and a mounting hole 11 is provided at one end of the swing block 10 facing the swing opening 9. The slide rod 7 and the spring 12 are inserted into the mounting hole 11, and the slide rod 7 extends out of the linkage box 8 through the swing opening 9. The slide rod 7 is kept in contact with the movable contact piece 4 under the elastic force of the spring 12, and the swing block 10 can move along the linkage box 8. The handle 6 moves and swings in the sliding direction, and the swing block 10 extends outwardly with springs 13 on both sides of the sliding direction of the handle 6. Any spring 13 extends from the end of the swing block 10 close to the swing opening 9 to the end away from the swing opening 9 and finally slides against the inner wall of the linkage box 8. When the slide bar 7 is subjected to the friction force opposite to the sliding direction of the handle 6, it drives the swing block 10 to swing to squeeze the spring 13 on one side of the swing block 10. The squeezed spring 13 elastically deforms to store the kinetic energy that drives the swing block 10 to reset. The linkage box 8 is connected to the handle 6 and slides with the handle 6. A protrusion 14 is provided on the outer wall of the linkage box 8 facing the handle 6. The handle 6 is provided with an embedding groove 15 that cooperates with the protrusion 14. The protrusion 14 is inserted into the embedding groove 15 to realize the connection between the linkage box 8 and the handle 6. The handle 6 drives the linkage box 8 to move back and forth through the protrusion 14.
[0024] By setting the linkage box 8 and the swing block 10, the slide bar 7 lags behind the sliding distance of the dial handle 6 due to the swing of the swing block 10 at the initial sliding stage. When the slide bar 7 passes over the fulcrum of the moving contact piece 4, the compressed spring sheet 13 releases the elastic force to drive the slide bar 7 to quickly reset, accelerate the sliding in the direction away from the fulcrum, and drive the moving contact piece 4 to swing quickly. When the switch is closed, the moving contact 5 and the auxiliary contact 203 can be quickly contacted to avoid arcing. When the switch is opened, the moving contact 5 and the auxiliary contact 203 can also be quickly separated to further avoid arcing.
[0025] like Figure 7 As shown, in order to improve the smooth swinging of the swing block 10, one end of the swing block 10 close to the swing opening 9 is a circular arc surface 16 bent along the sliding direction of the handle 6, and the inner walls of the linkage box 8 on both sides of the swing opening 9 are concave arc surfaces 17 that cooperate with the circular arc surfaces 16 of the swing block 10, and the width of the swing opening 9 along the sliding direction of the handle 6 is smaller than the width of the swing block 10.
[0026] The shell 1 described in this embodiment includes a base 101 and a cover body 102 that are matched with each other. A long hole 18 is opened on the cover body 102. One end of the handle 6 passes through the long hole 18 and extends out of the cover body 102. Leaf springs 19 are respectively connected to both sides of the handle 6. The two leaf springs 19 are respectively abutted against the inner walls of the cover body 102 on both sides. Protrusions 20 are symmetrically arranged on the inner walls of the cover body 102 on both sides. When the leaf spring 19 slides over the protrusion 20, the user who pushes the handle 6 to slide will feel a sense of frustration, and the handle 6 will be locked in this position to maintain the open or closed state of the switch.
[0027] To improve the dustproof effect, a dustproof plate 21 is preferably sleeved on the handle 6, and the dustproof plate 21 is in contact with the inner wall of the cover body 102 with the long hole 18. The dustproof plate 21 slides with the handle 6 and blocks the empty area of the long hole 18 to prevent dust from entering the interior of the shell 1.
[0028] like Figure 6 As shown, one end of the moving terminal 3 is a support portion 301, and the support portion 301 serves as a fulcrum for the moving contact piece 4 and is used to support the moving contact piece 4. A U-shaped compression spring 22 is connected to the support portion 301, and the open end of the compression spring 22 faces the end of the support portion 301. Both side walls of the compression spring 22 extend toward the end of the support portion 301 and are arranged on both sides of the moving contact piece 4. Both side walls of the compression spring 22 are elastically pressed inwardly and downwardly on both sides of the moving contact piece 4, so that the moving contact piece 4 is stably abutted against the support portion 301.
[0029] A magnet 23 is also connected to the inner wall of the housing 1, and the magnet 23 is located on one side of the auxiliary contact 203. The magnet 23 can attract the arc. When an arc unexpectedly occurs between the auxiliary contact 203 and the movable contact 5, the magnet 23 draws the arc toward itself, thereby preventing the arc from connecting the auxiliary contact 203 and the movable contact 5, causing the two to be turned on and generate a large current and high temperature, which can also properly protect the safety of each contact.
[0030] The working process of this embodiment is as follows: Figure 3 The arc-resistant high-current switch shown is in the disconnected state, the slide bar 7 is located on the right side of the fulcrum of the moving contact piece 4, the slide bar 7 abuts against the moving contact piece 4 to tilt the left end of the moving contact piece 4, and the moving contact 5 is separated from the auxiliary contact 203.
[0031] When the switch needs to be closed, the linkage box 8 is pushed to the right by the handle 6. Figure 3As shown in the figure, the sliding bar 7 moves to the left, and the sliding bar 7 drives the swing block 10 to swing to the right due to the friction resistance of the moving contact piece 4, causing the sliding bar 7 to lag behind the displacement of the lever 6. When the swing block 10 swings to the right, it squeezes the spring piece 13 on its left side, causing the spring piece 13 on the left side to elastically deform and accumulate elastic potential energy. When the swing block 10 swings to the limit position or the elastic force of the spring piece 13 is balanced with the friction force on the sliding bar 7, the sliding bar 7 moves to the left following the lever 6. When the sliding bar 7 passes over the fulcrum of the moving contact piece 4 (i.e., the supporting portion 301 of the moving terminal 3), driven by the elastic force of the spring 12, the sliding bar 7 presses down the moving contact piece 4 to make the left end of the moving contact piece 4 tilt downward, and the friction between the sliding bar 7 and the moving contact piece 4 The friction force is reduced and affected by the downward tilt of the left end of the moving contact piece 4, the spring piece 13 on the left side of the swing block 10 releases elastic potential energy to drive the swing block 10 to drive the slide bar 7 to swing to the left, quickly catching up with the displacement of the upper handle 6, and when the slide bar 7 swings rapidly to the left, the spring 12 also drives the slide bar 7 to move downward rapidly, driving the left end of the moving contact piece 4 to swing downward rapidly, so that the moving contact 5 quickly abuts against the auxiliary contact 203 to realize circuit conduction. After the circuit is conducted, no arcing phenomenon will occur. The auxiliary contact 203 is pressed and continues to move toward the static contact 202 until it abuts against the static contact 202 to realize effective conduction, and the spring piece 204 supporting the auxiliary contact 203 is elastically deformed.
[0032] Before the auxiliary contact 203 contacts the stationary contact 202 , the circuit is temporarily turned on through the spring 204 , and this process does not affect the normal function of the spring 204 .
[0033] When the switch needs to be disconnected, the linkage box 8 is pushed to the left by the handle 6. Figure 3 As shown in the right side movement, the action of the slide bar 7 is opposite to that when the switch is closed. In the lag stage of the slide bar 7, the left end of the movable contact piece 4 is slowly lifted up. At this time, under the elastic force of the spring piece 204, the auxiliary contact 203 follows the movable contact 5 to rise and maintain abutment relationship, maintaining the circuit conduction. When the slide bar 7 passes over the fulcrum of the movable contact piece 4 to the right, the left end of the movable contact piece 4 is quickly tilted up and separated from the auxiliary contact 203, thereby improving or even avoiding the generation of an arc when the movable contact 5 is separated from the auxiliary contact 203. Example 3
[0034] This embodiment uses Figure 1 and Figure 3 Taking the example, the method of separating the moving and static contacts of a large current switch from one to another to resist arcing is described in detail. Figure 1 and Figure 3As shown, an auxiliary contact 203 is suspended between the static contact 202 and the moving contact 5. The auxiliary contact 203 is elastically arranged above the static contact 202 and keeps conducting with the static terminal 201. When the moving contact 5 is to be conducted with the static contact 202, the auxiliary contact 203 is pressed to abut against the static contact 202, so that the moving contact 5, the auxiliary contact 203 and the static contact 202 are abutted and conducted. When the moving contact 5 is to be disconnected from the static contact 202, the moving contact 5 accelerates in the direction away from the static contact 202. The auxiliary contact 203 relies on the rebound force to maintain the abutment with the moving contact 5 when the moving contact 5 is disconnected at a low speed, so as to keep the conducting relationship between the moving contact 5 and the static terminal 201. When the auxiliary contact 203 rebounds into place, the moving contact 5 enters a high-speed movement stage and quickly separates from the auxiliary contact 203 to avoid arcing.
[0035] The above embodiments are only illustrative of the principles and effects of the invention, as well as some embodiments of its application, and are not intended to limit the invention. It should be pointed out that a person skilled in the art can make several modifications and improvements without departing from the inventive concept of the invention, and all of these belong to the protection scope of the invention.
Claims
1. A method for separating moving and static contacts of a high current switch to resist arcing, characterized in that: An auxiliary contact is suspended between the static contact and the moving contact. The auxiliary contact is elastically arranged above the static contact and keeps conduction with the static terminal. When the moving contact is to be conducted with the static contact, the auxiliary contact is pressed to abut against the static contact, so as to achieve abutment and conduction among the moving contact, the auxiliary contact and the static contact. When the moving contact is to be disconnected from the static contact, the moving contact accelerates in a direction away from the static contact. The auxiliary contact relies on the rebound force to maintain abutment with the moving contact when the moving contact is disconnected at a low speed, so as to maintain the conduction relationship between the moving contact and the static terminal. When the auxiliary contact rebounds into place, the moving contact enters a high-speed movement stage and quickly separates from the auxiliary contact.
2. A static contact group of a high current switch with arc resistance, comprising a static terminal (201) and a static contact point (202) fixedly connected to the static terminal (201), characterized in that: It also includes an auxiliary contact (203) arranged opposite to the static contact (202); the auxiliary contact (203) is connected to the static terminal (201) via a spring sheet (204); in the absence of external force, the elastic force of the spring sheet (204) keeps the auxiliary contact (203) and the static contact (202) separated; when the switch is closed, the auxiliary contact (203) abuts against the static contact (202) under the pressure of the moving contact to achieve conduction.
3. The arc-resistant high-current switch static contact assembly according to claim 2, wherein a current conducting cross-section of the static terminal (201) is larger than a current conducting cross-section of the spring (204).
4. A high current switch resistant to tensile arc, comprising a housing (1), a stationary contact group (2) arranged in the housing (1), a moving contact group and a driving mechanism, characterized in that: The static contact group (2) is the arc-resistant high-current switch static contact group as claimed in claim 2 or 3, the dynamic contact group comprises a dynamic terminal (3) fixedly connected in the housing (1), a dynamic contact piece (4) swingably connected to the dynamic terminal (3) with the dynamic terminal (3) as a fulcrum, and a dynamic contact (5) fixedly connected to one end of the dynamic contact piece (4) and facing the auxiliary contact (203) of the static contact group (2), the driving mechanism comprises a handle (6) slidably connected to the housing (1) and one end of which extends out of the housing (1), and a slide bar (7) elastically connected to the handle (6) and driven by the handle (6) to move along the dynamic contact piece (4), the lower end of the slide bar (7) abuts against the dynamic contact piece (4), and the handle (6) drives the slide bar (7) to move back and forth on both sides of the swing fulcrum of the dynamic contact piece (4), driving the dynamic contact piece (4) to swing to achieve the closing and opening of the switch.
5. The arc-resistant high-current switch according to claim 4, characterized in that: The driving mechanism further comprises a linkage box (8) slidably arranged in the housing (1); a swing opening (9) is provided at one end of the linkage box (8) facing the movable contact piece (4); a swing block (10) is provided inside the linkage box (8); a mounting hole (11) is provided at one end of the swing block (10) facing the swing opening (9); the slide bar (7) and the spring (12) are inserted into the mounting hole (11); the slide bar (7) passes through the swing opening and extends out of the linkage box (8); the slide bar (7) is kept in contact with the movable contact piece (4) under the elastic force of the spring (12); the swing block (10) can slide along the handle (6) in the linkage box (8) to move in a certain direction. The swing block (10) is swayed and swung, and reeds (13) are extended obliquely outward on both sides of the swing block (10) along the sliding direction of the handle (6). Any reed (13) extends from the end of the swing block (10) close to the swing opening (9) to the end away from the swing opening (9) and finally slides against the inner wall of the linkage box (8). When the slide bar (7) is subjected to a friction force in the opposite direction of the sliding direction of the handle (6), the swing block (10) is driven to swing to squeeze the reed (13) on one side of the swing block (10). The squeezed reed (13) elastically deforms to store kinetic energy for driving the swing block (10) to reset. The linkage box (8) is connected to the handle (6) and slides with the handle (6).
6. The arc-resistant high-current switch according to claim 5, characterized in that: One end of the swing block (10) close to the swing opening (9) is a circular arc surface (16) bent along the sliding direction of the lever (6); the inner walls of the linkage box (8) located on both sides of the swing opening (9) are concave arc surfaces (17) matching the circular arc surface (16) of the swing block (10); and the width of the swing opening (9) along the sliding direction of the lever (6) is smaller than the width of the swing block (10).
7. The arc-resistant high-current switch according to claim 4, characterized in that: The housing (1) comprises a base (101) and a cover (102) which are matched to each other. The cover (102) is provided with a long hole (18). One end of the dial handle (6) passes through the long hole (18) and extends out of the cover (102). Leaf springs (19) are respectively connected to both sides of the dial handle (6). The two leaf springs (19) are respectively in contact with the inner walls of both sides of the cover (102). Protrusions (20) are symmetrically arranged on the inner walls of both sides of the cover (102). When the leaf spring (19) slides over the protrusions (20), the user who pushes the dial handle (6) to slide feels a sense of frustration, and the dial handle (6) is locked at this position to maintain the open or closed state of the switch.
8. The arc-resistant high-current switch according to claim 7, characterized in that: A dustproof plate (21) is sleeved on the dial handle (6), and the dustproof plate (21) is in contact with the inner wall of the cover body (102) having the long hole (18). The dustproof plate (21) slides along with the dial handle (6) and blocks the empty area of the long hole (18).
9. The arc-resistant high-current switch according to claim 4, characterized in that: One end of the movable terminal (3) is a support portion (301), the support portion (301) serving as a fulcrum of the movable contact piece (4) and used to support the movable contact piece (4), the support portion (301) being connected to a U-shaped compression spring (22), the opening end of the compression spring (22) facing the end of the support portion (301), the two side walls of the compression spring (22) extending toward the end of the support portion (301) and being arranged on both sides of the movable contact piece (4), the two side walls of the compression spring (22) being elastically pressed inwardly and downwardly on both sides of the movable contact piece (4), so that the movable contact piece (4) is stably abutted against the support portion (301).
10. The arc-resistant high-current switch according to claim 4, characterized in that: A magnet (23) is also connected to the inner wall of the housing (1), and the magnet (23) is located on one side of the auxiliary contact (203).
Citation Information
Patent Citations
Slide switch
CN110853960A
Reliable type D.C. high -current switch for appliance
CN207097726U