Differential driving assembly applied to rocker switch and anti-pull arc rocker switch

Abstract

The invention relates to a differential driving assembly applied to a rocker switch and an anti-pull arc rocker switch, a linkage box and a swing block are used for connecting a sliding rod and a shifting handle, so that the sliding rod is inclined due to the friction force of a movable contact piece and slides towards the other end of the movable contact piece after the shifting handle at the initial stage of pushing the shifting handle; and when the sliding rod moves to the other side of the fulcrum of the movable contact piece, the sliding rod is driven by the elastic force of the reed to quickly reset, so that the sliding speed is increased, the movable contact piece is driven to quickly swing in place, the swing speed of the movable contact piece is increased, and the technical problem that an electric arc is generated between the movable contact and the static contact is solved.

Description

Technical Field

[0001] The invention belongs to the technical field of switches, and in particular relates to a differential drive assembly applied to a seesaw switch and an anti-arc seesaw switch. Background Art

[0002] Rocker switches are widely used in the field of electric switches. Their structure mainly consists of a moving contact piece swingably connected to a moving terminal, a moving contact point connected to one end of the moving contact piece, a fixed static terminal, a static contact point fixedly connected to the static terminal, and a driving component slidably connected in a switch housing for a user to drive the moving contact piece to swing back and forth at a fulcrum. The driving component partially extends out of the switch housing for user control. For example, a toggle switch is disclosed in the utility model patent with publication number CN219642714U.

[0003] When this traditional toggle switch is closed, an arc is generated between the moving contact and the stationary contact because the swing speed of the moving contact is not fast enough. The arc will oxidize the surface of the moving contact and the stationary contact to form an oxide layer, resulting in a decrease in conductivity and affecting the normal use of the switch. If the arc is to be avoided as much as possible, the swing speed of the moving contact needs to be increased, but conventional drive components are difficult to achieve the technical goal of increasing the swing speed of the moving contact. Summary of the invention

[0004] The first technical problem to be solved by the present invention is to provide a differential drive assembly applied to a rocker switch to solve the technical problem that the conventional drive assembly drives the moving contact piece to swing slowly.

[0005] The cam is provided with a plurality of springs, each of which is provided with a plurality of springs, each of which is provided with a plurality of springs, each of which is provided with a plurality of springs, each of which is provided with a plurality of springs, each of which is provided with a plurality of springs, each of which is provided with a plurality of springs, each of which is provided with a plurality of springs, each of which is provided with a plurality of springs, each of which is provided with a plurality of springs, each of which is provided with a plurality of springs, each of which is provided with a plurality of springs, each of which is provided with a plurality of springs, each of which is provided with a plurality of springs, each of which is provided with a plurality of springs, each of which is provided with a plurality of springs, each of which is provided with a plurality of springs, each of which is provided with a plurality of springs,

[0006] 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.

[0007] As a preferred solution, an assembly opening for installing the swing block is provided at one end of the linkage box away from the swing opening.

[0008] As a preferred solution, one end of the spring sheet abutting against the inner wall of the linkage box is bent toward the swing block to form an arc-shaped sliding contact portion.

[0009] As a preferred solution, the same side of the two spring leaves near the end are connected to each other through a connecting plate, a through hole is provided on the connecting plate, a groove adapted to the connecting plate is provided on the swing block, a convex column adapted to the through hole is provided on the bottom surface of the groove, and the connecting plate is embedded in the groove and sleeved on the convex column.

[0010] As a preferred solution, the side walls of the swing block on both sides of the groove are respectively provided with embedding grooves corresponding to the two springs, and one end of any spring connected to the connecting piece is inserted into the embedding groove.

[0011] As a preferred solution, the interior of the linkage box is a U-shaped cavity that is larger at the top and smaller at the bottom. The top of the cavity is an assembly opening, and the swing opening is opened on the arc bottom of the cavity. The two inner side walls of the cavity opposite to the two reeds gradually tilt outward from bottom to top and the inclination angle is smaller than the inclination angle of the reeds.

[0012] A further technical problem to be solved by the present invention is to provide an arc-resistant rocker switch to solve the technical problem that the traditional rocker switch is prone to arcing, resulting in low safety and short life.

[0013] In order to solve the above technical problems, the technical solution adopted by the present invention is: an anti-tension arc rocker switch, comprising a shell, a static terminal and a moving terminal connected inside the shell, a static contact fixedly connected to the static terminal, a moving contact piece swung to the moving terminal with the moving terminal as a fulcrum, and a moving contact connected to one end of the moving contact piece, the moving contact is directly opposite to the static contact, and it is characterized in that it also includes a differential drive assembly as described in any one of claims 1 to 7 above, the differential drive assembly is slidably arranged in the shell, a long hole is provided on the shell for one end of the dial handle to extend out, the dial handle and the linkage box located in the shell are slidably connected to the inner wall of the shell, the swing opening is directly opposite to the moving contact piece, and one end of the slide rod extending out of the swing opening abuts against the moving contact piece, when the dial handle is toggled, the dial handle drives the linkage box and the slide rod to move from one side of the fulcrum to the other side along the surface of the moving contact piece, driving the moving contact piece to swing to disconnect or close the moving contact and the static contact.

[0014] As a preferred solution, when the slide bar and the moving contact are arranged on both sides of the moving contact piece fulcrum, the moving contact piece is inclined 3°-20° toward one side of the slide bar.

[0015] The beneficial effects of the present invention are as follows: the present invention utilizes a linkage box and a swing block to connect the slide bar and the dial handle, so that in the initial stage of the dial handle being pushed, the slide bar is tilted by the friction force of the moving contact piece and slides toward the other end of the moving contact piece lagging behind the dial handle; and when the slide bar moves to the other side of the fulcrum of the moving contact piece, the slide bar is driven by the elastic force of the spring sheet to quickly reset, thereby accelerating the sliding speed, driving the moving contact piece to quickly swing into place, increasing the swinging speed of the moving contact piece, and improving the technical problem of arc generation between the moving contact and the static contact. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] 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 differential drive assembly described in Example 1; Figure 2 is a schematic diagram of the three-dimensional structure of the swing block described in Example 1; Figure 3 is a cross-sectional view of the assembly structure of the linkage box and the swing block described in Example 1; Figure 4 is a schematic diagram of the three-dimensional structure of the arc-resistant rocker switch described in Example 2; Figure 5 is a cross-sectional view of the arc-resistant rocker switch described in Example 2; Figure 6 is a schematic diagram of the assembly structure of the housing, the dial handle and the linkage box described in Example 2; Figure 1 to Figure 6 In: 1. Handle; 2. Slide bar; 3. Linkage box; 4. Swing opening; 5. Swing block; 6. Mounting hole; 7. Spring; 8. Spring leaf; 9. Assembly opening; 10. Sliding contact portion; 11. Connecting piece; 12. Through hole; 13. Recess; 14. Boss; 15. Embedded groove; 16. Cavity; 17. Housing; 18. Static terminal; 19. Moving terminal; 20. Static contact; 21. Moving contact piece; 22. Moving contact; 23. Long hole; 24. Arc surface; 25. Concave arc surface; 26. Plug-in body; 27. Socket; 100. Differential drive assembly. DETAILED DESCRIPTION

[0017] The specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. Example 1

[0018] like Figure 1~Figure 3The differential drive assembly for a rocker switch shown in the figure comprises a handle 1, a slide bar 2 driven by the handle 1 to slide, and a linkage box 3, one end of which is provided with a swing opening 4, a swing block 5 is arranged inside the linkage box 3, and a mounting hole 6 is arranged at one end of the swing block 5 facing the swing opening 4, the slide bar 2 and the spring 7 are inserted into the mounting hole 6, the outer end of the slide bar 2 passes through the swing opening and extends out of the linkage box 3, and the inner end abuts against the spring 7, the slide bar 2 is kept in an outwardly extended state under the elastic force of the spring 7, and is kept abutting against the moving contact piece of the switch, and the swing block 5 can be in the linkage box 3. The swing block 5 moves and swings along the sliding direction of the handle 1. Reed leaves 8 extend obliquely outward on both sides of the swing block 5 along the sliding direction of the handle 1. Any reed leaf 8 extends from the end of the swing block 5 close to the swing opening 4 to the end away from the swing opening 4 and finally slides against the inner wall of the linkage box 3. When the slide bar 2 is subjected to a radial force along the arrangement direction of the two reed leaves 8, the swing block 5 is driven to swing to squeeze the reed leaf 8 on one side of the swing block 5. The squeezed reed leaf 8 elastically deforms to store kinetic energy that drives the swing block 5 to quickly reset. When the swing block 5 resets, it drives the slide bar 2 to quickly reset. The linkage box 3 is connected to the handle 1 and slides with the handle 1.

[0019] When the differential drive assembly of the present embodiment is used to drive the moving contact piece of the rocker switch, when the user pushes the handle 1 of the drive assembly to move in the swinging direction of the moving contact piece, the slide bar 2 lags behind the handle 1 due to the friction force, that is, when the handle 1 drives the linkage box 3 to move, the slide bar 2 moves in the direction of the swing fulcrum of the moving contact piece, the outer end of the slide bar 2 remains prohibited due to the friction force, and the inner end of the slide bar 2 is driven by the linkage box 3 to move, causing the slide bar 2 to tilt, driving the swing block 5 to deflect, and the swing block 5 deflects and squeezes the spring sheet 8 on one side to make the spring sheet 8 elastically deformed. When the rod 2 swings to the extreme position or the rebound force provided by the spring 8 overcomes the friction between the outer end of the slide rod 2 and the moving contact piece, the slide rod 2 follows the linkage box 3 and the handle 1 in an inclined posture to slide along the moving contact piece. When the slide rod 2 moves from one side of the fulcrum of the moving contact piece to the other side, the friction between the moving contact piece and the slide rod 2 drops sharply due to the change in the inclination direction of the moving contact piece. Under the action of the restoring force of the spring 8, the slide rod 2 quickly returns to the vertical state, which is equivalent to quickly moving in the direction of the swing fulcrum away from the moving contact piece. The movement speed is superimposed on the movement speed of the handle 1, which can quickly push the moving contact piece to swing into place, so that the moving contact and the static contact quickly contact or separate, thereby avoiding the generation of arcs when the switch is opened and closed.

[0020] In this embodiment, one end of the swing block 5 close to the swing opening 4 is an arc surface 24 bent along the sliding direction of the handle 1, and the inner walls of the linkage box 3 on both sides of the swing opening 4 are concave arc surfaces 25 that cooperate with the arc surface 24 of the swing block 5. The width of the swing opening 4 along the sliding direction of the handle 1 is smaller than the width of the swing block 5.

[0021] The provision of the arc surface 24 and the concave arc surface 25 can reduce the swing resistance of the swing block 5 and improve the effect of the compressed spring piece 8 driving the swing block 5 to return to its original position.

[0022] In this embodiment, an assembly opening 9 for mounting the swing block 5 is provided at one end of the linkage box 3 away from the swing opening 4, so as to facilitate the assembly of the swing block 5 and improve the assembly efficiency.

[0023] In this embodiment, one end of the spring 8 abutting against the inner wall of the linkage box 3 is bent toward the swing block 5 to form an arc-shaped sliding contact portion 10. The sliding contact portion 10 can effectively reduce the friction between the spring 8 and the inner wall of the linkage box 3, making the swing block 5 swing more easily and smoothly.

[0024] In this embodiment, the two spring leaves 8 are connected to each other at the same side near the end through a connecting piece 11. A through hole 12 is formed on the connecting piece 11. A groove 13 adapted to the connecting piece 11 is formed on the swing block 5. A convex column 14 adapted to the through hole 12 is provided on the bottom surface of the groove 13. The connecting piece 11 is embedded in the groove 13 and sleeved on the convex column 14.

[0025] The two spring leaves 8 and the connecting piece 11 are integrally bent and fixed by means of the groove 13 and the protruding column 14 , which simplifies the assembly structure and improves the connection stability between the spring leaves 8 and the swing block 5 .

[0026] In this embodiment, preferably, the side walls of the swing block 5 on both sides of the groove 13 are respectively provided with embedding grooves 15 corresponding to the two springs 8, and one end of any spring 8 connected to the connecting piece 11 is inserted into the embedding groove 15. This further limits the positions of the two springs 8, and prevents the two springs 8 from twisting relative to the swing block 5, resulting in an error in the swing angle of the swing block 5 when the springs 8 drive the swing block 5 to swing.

[0027] The linkage box 3 has a U-shaped cavity 16 formed inside, which is larger at the top and smaller at the bottom. The top of the cavity 16 is the assembly opening 9, and the swing opening 4 is provided on the arc bottom of the cavity 16. The two inner side walls of the cavity 16 opposite to the two springs 8 gradually tilt outward from bottom to top, and the tilt angle is smaller than the tilt angle of the springs 8. The U-shaped cavity 16 can not only improve the assembly convenience of the swing block 5, but also help to improve the swing flexibility of the swing block 5.

[0028] The specific working process of the differential drive assembly described in this embodiment refers to the working process of Embodiment 2. Example 2

[0029] like Figure 4~Figure 6The anti-tension arc rocker switch shown in the figure comprises a housing 17, a static terminal 18 and a dynamic terminal 19 connected to the inside of the housing 17, a static contact 20 fixedly connected to the static terminal 18, a dynamic contact piece 21 swingably connected to the dynamic terminal 19 with the dynamic terminal 19 as a fulcrum, and a dynamic contact 22 connected to one end of the dynamic contact piece 21, the dynamic contact 22 is directly opposite to the static contact 20, and also comprises the differential drive assembly 100 described in the above embodiment 1, the differential drive assembly 100 is slidably arranged on the housing 17, a long hole 23 is provided on the shell 17 for one end of the handle 1 to extend out, the handle 1 and the linkage box 3 located in the shell 17 are slidably connected to the inner wall of the shell 17, the swing opening 4 is opposite to the moving contact piece 21, and one end of the slide bar 2 extending out of the swing opening 4 abuts on the moving contact piece 21. When the handle 1 is turned, the handle 1 drives the linkage box 3 and the slide bar 2 to move from one side of the fulcrum to the other side along the surface of the moving contact piece 21, driving the moving contact piece 21 to swing to disconnect or close the moving contact 22 and the static contact 20.

[0030] In this embodiment, when the slide bar 2 and the moving contact 22 are respectively arranged on both sides of the supporting point of the moving contact piece 21, the moving contact piece 21 is inclined toward one side of the slide bar 2 by 3°-20°.

[0031] In this embodiment, a socket 27 is formed on one side of the handle 1 facing the linkage box 3, and a plug-in body 26 that cooperates with the socket 27 is integrally formed on the swing block 5. The plug-in body 26 is plugged into the socket 27 to achieve the connection between the handle 1 and the linkage box 3. The moving direction of the handle 1 is perpendicular to the axial direction of the socket 27.

[0032] The working process of this embodiment is as follows: Figure 5 The anti-tension arc rocker switch shown is in the disconnected state, the slide bar 2 is located on the right side of the fulcrum of the moving contact piece 21, the slide bar 2 abuts against the moving contact piece 21 to tilt the left end of the moving contact piece 21, and the moving contact 22 is separated from the static contact 20.

[0033] When the switch needs to be closed, push the linkage box 3 to Figure 5As shown in the figure, the slide bar 2 moves to the left, and the friction resistance of the movable contact piece 21 drives the swing block 5 to swing to the right, causing the slide bar 2 to lag behind the displacement of the dial handle 1. When the swing block 5 swings to the right, it squeezes the spring piece 8 on its left side, causing the spring piece 8 on the left side to elastically deform and accumulate elastic potential energy. When the swing block 5 swings to the limit position or the elastic force of the spring piece 8 is balanced with the friction force on the slide bar 2, the slide bar 2 moves to the left with the dial handle 1 in an inclined posture. When the slide bar 2 passes the fulcrum of the movable contact piece 21, it is driven by the elastic force of the spring 7. The rod 2 presses down the moving contact piece 21 to make the left end of the moving contact piece 21 tilt downward, the friction between the slide bar 2 and the moving contact piece 21 is reduced, and the spring piece 8 on the left side of the swing block 5 releases elastic potential energy to drive the swing block 5 to drive the slide bar 2 to swing to the left, quickly catching up with the displacement of the upper handle 1, and when the slide bar 2 swings rapidly to the left, the spring 7 also drives the slide bar 2 to move downward rapidly, driving the left end of the moving contact piece 21 to swing downward rapidly, so that the moving contact 22 quickly abuts against the static contact 20 to achieve circuit conduction, thereby avoiding arcing.

[0034] When the switch needs to be disconnected, push the linkage box 3 to Figure 5 As shown in the right side movement, the action of the slide bar 2 is opposite to that when the switch is closed. In the lag stage of the slide bar 2, the lifting speed of the left end of the moving contact piece 21 is the same as that of a conventional rocker switch. When the slide bar 2 passes the fulcrum of the moving contact piece 21 to the right, the left end of the moving contact piece 21 quickly lifts up and separates from the static contact 20, thereby improving the problem of arc generation when the moving contact 22 is separated from the static contact 20.

[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 differential drive assembly for a rocker switch, comprising a handle (1) and a slide bar (2) driven by the handle (1) to slide, characterized in that: The invention also comprises a linkage box (3), one end of which is provided with a swing opening (4), a swing block (5) is arranged inside the linkage box (3), one end of the swing block (5) facing the swing opening (4) is provided with a mounting hole (6), the slide bar (2) and the spring (7) are inserted into the mounting hole (6), the outer end of the slide bar (2) passes through the swing opening and extends out of the linkage box (3), and the inner end abuts against the spring (7), the swing block (5) can move and swing along the sliding direction of the handle (1) in the linkage box (3), and the swing block (5) can move along the sliding direction of the handle (1) on both sides. The two sides of the swing block (5) extend outwardly obliquely, and any one of the spring leaves (8) extends from one end of the swing block (5) close to the swing opening (4) to the end away from the swing opening (4) and finally slides against the inner wall of the linkage box (3). When the slide bar (2) is subjected to radial force, it drives the swing block (5) to swing to squeeze the spring leaves (8) on one side of the swing block (5). The squeezed spring leaves (8) elastically deform to store kinetic energy for driving the swing block (5) to quickly reset. The swing block (5) resets and drives the slide bar (2) to quickly reset. The linkage box (3) is connected to the handle (1) and slides along with the handle (1).

2. The differential drive assembly according to claim 1, characterized in that: One end of the swing block (5) close to the swing opening (4) is a circular arc surface (24) curved along the sliding direction of the handle (1); the inner walls of the linkage box (3) located on both sides of the swing opening (4) are concave arc surfaces (25) matching the circular arc surface (24) of the swing block (5); and the width of the swing opening (4) along the sliding direction of the handle (1) is smaller than the width of the swing block (5).

3. The differential drive assembly according to claim 1, characterized in that: An assembly opening (9) for mounting a swing block (5) is provided at one end of the linkage box (3) away from the swing opening (4).

4. The differential drive assembly according to claim 1, characterized in that: One end of the spring sheet (8) abutting against the inner wall of the linkage box (3) is bent in the direction of the swing block (5) to form an arc-shaped sliding contact portion (10).

5. The differential drive assembly according to claim 1, characterized in that: The two spring leaves (8) are connected to each other at the same side of the proximal ends via a connecting piece (11), a through hole (12) is provided on the connecting piece (11), a groove (13) adapted to the connecting piece (11) is provided on the swing block (5), a convex column (14) adapted to the through hole (12) is provided on the bottom surface of the groove (13), and the connecting piece (11) is embedded in the groove (13) and sleeved on the convex column (14).

6. The differential drive assembly according to claim 5, characterized in that: The side walls of the swing block (5) on both sides of the groove (13) are respectively provided with embedding grooves (15) corresponding to the two spring leaves (8) one by one, and one end of any spring leaf (8) connected to the connecting piece (11) is inserted into the embedding groove (15).

7. The differential drive assembly according to claim 3, characterized in that: The linkage box (3) has a U-shaped cavity (16) formed inside, which is larger at the top and smaller at the bottom. The top of the cavity (16) is an assembly opening (9). The swing opening (4) is formed on the arc bottom of the cavity (16). The two inner side walls of the cavity (16) opposite to the two reeds (8) are gradually inclined outwards from bottom to top and the inclination angle is smaller than the inclination angle of the reeds (8).

8. An arc-resistant rocker switch, comprising a housing (17), a static terminal (18) and a dynamic terminal (19) connected to the inside of the housing (17), a static contact (20) fixedly connected to the static terminal (18), a dynamic contact piece (21) swingably connected to the dynamic terminal (19) with the dynamic terminal (19) as a fulcrum, and a dynamic contact (22) connected to one end of the dynamic contact piece (21), the dynamic contact (22) facing the static contact (20), characterized in that: It also includes a differential drive assembly (100) as described in any one of claims 1 to 7, wherein the differential drive assembly (100) is slidably arranged in a housing (17), and a long hole (23) is provided on the housing (17) for one end of the dial handle (1) to extend out. The dial handle (1) and the linkage box (3) located in the housing (17) are slidably connected to the inner wall of the housing (17), and the swing opening (4) is directly opposite to the moving contact piece (21). One end of the slide bar (2) extending out of the swing opening (4) abuts against the moving contact piece (21). When the dial handle (1) is moved, the dial handle (1) drives the linkage box (3) and the slide bar (2) to move from one side of the fulcrum to the other side along the surface of the moving contact piece (21), driving the moving contact piece (21) to swing to disconnect or close the moving contact (22) and the stationary contact (20).

9. The arc-resistant rocker switch according to claim 8, characterized in that: When the slide bar (2) and the moving contact point (22) are arranged on both sides of the supporting point of the moving contact piece (21), the moving contact piece (21) is inclined by 3°-20° toward one side of the slide bar (2).

Images