Labor-saving structure of foot switch

Abstract

The utility model discloses a labor-saving structure of a foot switch, which relates to the field of foot switches and has the technical key points that the labor-saving structure comprises a bottom plate, a switch valve core and a switch connecting pin are arranged at the top of the bottom plate, the switch connecting pin is in sliding fit with the top of the bottom plate, one end of the switch connecting pin faces the switch valve core, and the other end of the switch connecting pin faces the switch valve core. A shell is arranged at the top of the bottom plate, a pedal is hinged to one side of the shell, a pedal connecting rod is arranged at the top of the bottom plate and located below the pedal, one end of the pedal connecting rod is hinged to the top of the bottom plate, and a labor-saving rotating frame is arranged at the other end of the pedal connecting rod. The labor-saving rotating frame is located between the pedal connecting rod and the switch connecting pin, and the technical problems that when the switch valve element is opened, the switch connecting pin needs to have certain thrust, so that a doctor treads on the switch valve element for a long time, the foot ache is caused, especially a female doctor difficultly treads on the pedal for multiple times, and operation is inconvenient are solved.

Description

Technical Field

[0001] The utility model relates to the field of foot switches, in particular to a labor-saving structure of a foot switch. Background Art

[0002] The foot switch is a control tool frequently used by dentists. It is a switch that controls the on and off of the circuit by stepping on it. It is used in control circuits that cannot be touched by both hands to replace both hands to achieve the purpose of operation. It is used frequently. Usually, the foot switch consists of a shell, a switch valve spool, a pedal, and a switch connecting pin. When the doctor steps on the pedal, the pedal will drive the switch connecting pin to move, and the switch connecting pin will conflict with the switch valve spool to open the switch valve spool. Since the switch connecting pin needs a certain thrust to open the switch valve spool, the doctor will suffer foot pain if he steps on it for a long time. In particular, it is difficult for female doctors to step on the pedal multiple times, which causes inconvenience in operation. Utility Model Content

[0003] In order to solve the above-mentioned technical problems, the utility model provides a labor-saving structure of a foot switch, aiming to solve the technical problem that the switch connecting pin needs to have a certain thrust to open the switch valve core. Therefore, doctors will suffer from foot pain after stepping on the pedal for a long time, especially female doctors find it difficult to step on the pedal multiple times, causing inconvenience in operation.

[0004] The technical solution of the utility model to solve the above technical problems is:

[0005] The cam is hinged on the top of the base plate, and a pedal is hinged on one side of the shell; a pedal connecting rod is provided on the top of the base plate, and the pedal connecting rod is located below the pedal; one end of the pedal connecting rod is hinged on the top of the base plate; a labor-saving rotating frame is provided on the other end of the pedal connecting rod; the labor-saving rotating frame is located between the pedal connecting rod and the switch connecting pin; one end of the labor-saving rotating frame is provided with a sliding end, and the sliding end is slidably connected to the other end of the pedal connecting rod; the other end of the labor-saving rotating frame is provided with a rotating end, and the rotating end is hinged to the top of the base plate; a pushing protrusion is provided at the bottom of the rotating end, and the pushing protrusion conflicts with the other end of the switch connecting pin so that the switch connecting pin is pushed toward the switch valve core.

[0006] When the doctor steps on the pedal, the pedal moves downward and drives the pedal connecting rod to rotate downward during the downward movement. One end of the pedal connecting rod rotates downward along the top of the base plate. During the rotation of the pedal connecting rod, the other end of the pedal connecting rod drives the sliding end of the labor-saving rotating frame to slide, so that the rotating end of the labor-saving rotating frame rotates upward along the top of the base plate. The labor-saving rotating frame drives the push cam and the switch connecting pin through the lever theorem, so that the switch connecting pin is pushed toward the switch valve core to open it, so that the pedal force required is smaller to push the switch connecting pin toward the switch valve core, thereby achieving a labor-saving effect.

[0007] Furthermore, in the present application, a piston at one end of the switch valve core is connected to a valve core piston rod, a return spring is passed through the outside of the valve core piston rod, one end of the return spring is connected to one end of the switch valve core, and the other end of the return spring is connected to one end of the switch connecting pin.

[0008] When the doctor steps on the pedal, the switch connecting pin pushes the valve core piston rod, so that the valve core piston rod is slid into the switch valve core to open the switch valve core, and the reset spring is in a contracted state under the push of the switch connecting pin; when the doctor releases the pedal, the reset spring loses the thrust of the switch connecting pin and is in an extended state, and the reset spring drives the switch connecting pin to push the push convex, and the push convex drives the effort-saving rotating frame to rotate upward, and the effort-saving rotating frame drives the pedal connecting rod to rotate upward, so that the pedal is reset to facilitate the next use of the pedal.

[0009] Furthermore, in the present application, a guide seat is provided on the top of the base plate, a sliding groove is provided inside the guide seat, the switch connecting pin is slidably matched with the sliding groove, a limit plate is provided at one end of the switch connecting pin, the size of the limit plate is larger than the size of the sliding groove, and the other end of the reset spring is connected to the limit plate.

[0010] When the switch connecting pin moves, the switch connecting pin slides along the sliding groove of the guide seat, thereby guiding the moving position of the switch connecting pin; and when the reset spring drives the switch connecting pin to move, since the size of the limit plate is larger than the size of the sliding groove, the limit plate limits the sliding position of the switch connecting pin to prevent the switch connecting pin from sliding out of the sliding groove.

[0011] Furthermore, in the present application, a reset bracket is provided on the top of the base plate, a reset rotating shaft is rotatably connected inside the reset bracket, a reset torsion spring is provided outside the reset rotating shaft, a torsion spring limit frame is provided on one side of the reset torsion spring, the torsion spring limit frame is in contact with one side of the guide seat, a torsion spring limit foot is provided on the other side of the reset torsion spring, a fixed plate is provided on one side of the pedal, and the torsion spring limit foot is in contact with the fixed plate.

[0012] Furthermore, in the present application, the number of the reset brackets is two, one side of the two reset brackets is provided with a reset rotation groove, and both ends of the reset rotation shaft are respectively rotationally matched with the reset rotation grooves of the two reset brackets.

[0013] Furthermore, in the present application, a mounting groove is provided at the top of the pedal connecting rod, a switch roller is rotatably connected in the mounting groove, one side of the switch roller protrudes upward out of the mounting groove, and the switch roller rolls with the bottom of the pedal.

[0014] Furthermore, in the present application, rotation holes are provided on both sides of the installation slot, a roller shaft is passed through the interior of the switch roller, and the roller shaft is rotationally matched with the rotation holes on both sides of the installation slot respectively.

[0015] Furthermore, in the present application, two first fixed brackets are provided on the top of the base plate, a first rotation groove is opened on one side of the two first fixed brackets, a first setting groove is opened inside one end of the pedal connecting rod, a first connecting shaft is passed through the first setting groove, and both ends of the first connecting shaft are respectively rotatably matched with the first rotation grooves of the two first fixed brackets.

[0016] Furthermore, in the present application, a second setting groove is provided inside the sliding end, a movable shaft is passed through the second setting groove, both ends of the movable shaft protrude out of the second setting groove, a guide wheel is provided at the protruding end of the movable shaft, a limiting groove is provided on the outer edge of the guide wheel, and two guide grooves are provided inside the other end of the pedal connecting rod, and the two guide wheels are slidably matched with the two guide grooves.

[0017] Furthermore, in the present application, two second fixed brackets are provided on the top of the base plate, a second rotation groove is opened on one side of the two second fixed brackets, a third setting groove is opened inside the labor-saving rotating bracket, a second connecting shaft is passed through the third setting groove, and both ends of the second connecting shaft are respectively rotatably matched with the second rotation grooves of the two second fixed brackets.

[0018] The utility model has the following beneficial effects:

[0019] When the doctor steps on the pedal, the pedal moves downward and drives the pedal connecting rod to rotate downward during the downward movement. One end of the pedal connecting rod rotates downward along the top of the base plate. During the rotation of the pedal connecting rod, the other end of the pedal connecting rod drives the sliding end of the labor-saving rotating frame to slide, so that the rotating end of the labor-saving rotating frame rotates upward along the top of the base plate. The labor-saving rotating frame drives the push cam and the switch connecting pin through the lever theorem, so that the switch connecting pin is pushed toward the switch valve core to open it, so that the pedal force required is smaller to push the switch connecting pin toward the switch valve core, thereby achieving a labor-saving effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of the utility model.

[0021] Figure 2 It is a structural schematic diagram of a pedal of the utility model.

[0022] Figure 3 It is a structural schematic diagram of a fixing plate of the utility model.

[0023] Figure 4 It is a structural schematic diagram of the first fixing bracket of the utility model.

[0024] Figure 5 It is a structural schematic diagram of the switch roller of the utility model.

[0025] Figure 6 It is a structural schematic diagram of the pedal connecting rod of the utility model.

[0026] Figure 7 It is a structural schematic diagram of the second rotating groove of the utility model.

[0027] Figure 8 It is a structural schematic diagram of the guide seat of the utility model.

[0028] Fig. 9 It is a structural schematic diagram of the reset spring of the utility model.

[0029] Wherein, the reference numerals are:

[0030] 1. Bottom plate; 2. Shell; 3. Pedal; 4. First fixed bracket; 5. Second fixed bracket; 6. First rotating groove; 7. First connecting shaft; 8. Second rotating groove; 9. Mounting groove; 10. Switch roller; 11. First setting groove; 12. Rotating hole; 13. Guide groove; 14. Labor-saving rotating frame; 15. Movable shaft; 16. Second setting groove; 17. Third setting groove; 18. Second connecting shaft; 19. Guide seat; 20. Switch valve Valve core; 21, valve core piston rod; 22, reset spring; 23, switch connecting pin; 24, reset bracket; 25, reset rotation groove; 26, reset rotation shaft; 27, reset torsion spring; 28, torsion spring limit bracket; 29, torsion spring limit foot; 30, pedal connecting rod; 31, roller shaft; 32, push cam; 33, guide wheel; 34, limit groove; 35, sliding groove; 36, limit plate; 37, fixed plate; 38, sliding end; 39, rotating end. DETAILED DESCRIPTION

[0031] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0032] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0033] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or mutual communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0034] Reference Figure 1-Figure 9In some specific embodiments, a labor-saving structure of a foot switch includes a bottom plate 1, a switch valve core 20 and a switch connecting pin 23 are provided on the top of the bottom plate 1, the switch connecting pin 23 is slidably matched with the top of the bottom plate 1, one end of the switch connecting pin 23 faces the switch valve core 20, a shell 2 is provided on the top of the bottom plate 1, a pedal 3 is hinged on one side of the shell 2, a foot pedal connecting rod 30 is provided on the top of the bottom plate 1, the foot pedal connecting rod 30 is located below the pedal 3, one end of the foot pedal connecting rod 30 is hinged to the top of the bottom plate 1, and the foot pedal A labor-saving rotating frame 14 is provided at the other end of the connecting rod 30, and the labor-saving rotating frame 14 is located between the pedal connecting rod 30 and the switch connecting pin 23. A sliding end 38 is provided at one end of the labor-saving rotating frame 14, and the sliding end 38 is slidably connected to the other end of the pedal connecting rod 30. A rotating end 39 is provided at the other end of the labor-saving rotating frame 14, and the rotating end 39 is hinged to the top of the base plate 1. A push protrusion 32 is provided at the bottom of the rotating end 39, and the push protrusion 32 contacts the other end of the switch connecting pin 23 to push the switch connecting pin 23 toward the switch valve core 20.

[0035] Through the above technical scheme, when the doctor steps on the pedal 3, the pedal 3 moves downward, and in the process of moving downward, it drives the pedal connecting rod 30 to rotate downward, and one end of the pedal connecting rod 30 rotates downward along the top of the base plate 1. During the rotation of the pedal connecting rod 30, the other end of the pedal connecting rod 30 drives the sliding end 38 of the labor-saving rotating frame 14 to slide, so that the rotating end 39 of the labor-saving rotating frame 14 rotates upward along the top of the base plate 1. Through the lever theorem, the labor-saving rotating frame 14 drives the push protrusion 32 and the switch connecting pin 23 to push, so that the switch connecting pin 23 is pushed toward the switch valve core 20 to open it, so that the pedaling force required for the pedal 3 is smaller to push the switch connecting pin 23 toward the switch valve core 20, thereby achieving a labor-saving effect.

[0036] Reference Figure 5-Figure 9 In some specific embodiments, the piston at one end of the switch valve core 20 is connected to the valve core piston rod 21, and a return spring 22 is provided outside the valve core piston rod 21. One end of the return spring 22 is connected to one end of the switch valve core 20, and the other end of the return spring 22 is connected to one end of the switch connecting pin 23.

[0037] Through the above technical solution, when the doctor steps on the pedal 3, the switch connecting pin 23 pushes toward the valve core piston rod 21, so that the valve core piston rod 21 is slid into the switch valve core 20, and the switch valve core 20 is opened. The reset spring 22 is in a contracted state under the push of the switch connecting pin 23; when the doctor releases the pedal 3, the reset spring 22 loses the thrust of the switch connecting pin 23 and is in an extended state. The reset spring 22 drives the switch connecting pin 23 to push toward the push protrusion 32, and the push protrusion 32 drives the sliding end 38 of the labor-saving rotating frame 14 to rotate upward, and the labor-saving rotating frame 14 drives the pedal connecting rod 30 to rotate upward, so that the pedal 3 is reset to facilitate the next use of the pedal 3.

[0038] It should be noted that an elastic member is preset inside the switch valve core 20, so that after the switch connecting pin 23 loses the thrust of the push protrusion 32, the valve core piston rod 21 can be driven to slide out of the switch valve core 20 through the extension of the elastic member.

[0039] Reference Figure 8 In some specific embodiments, a guide seat 19 is provided on the top of the base plate 1, a sliding groove 35 is opened inside the guide seat 19, the switch connecting pin 23 slides with the sliding groove 35, a limit plate 36 is provided at one end of the switch connecting pin 23, the size of the limit plate 36 is larger than the size of the sliding groove 35, and the other end of the return spring 22 is connected to the limit plate 36.

[0040] Through the above technical solution, when the switch connecting pin 23 moves, the switch connecting pin 23 slides along the sliding groove 35 of the guide seat 19, thereby guiding the moving position of the switch connecting pin 23; and when the return spring 22 drives the switch connecting pin 23 to move, since the size of the limit plate 36 is larger than the size of the sliding groove 35, the limit plate 36 limits the sliding position of the switch connecting pin 23 to prevent the switch connecting pin 23 from sliding out of the sliding groove 35.

[0041] Reference Figure 2-Figure 9 In some specific embodiments, a reset bracket 24 is provided on the top of the base plate 1, and a reset rotating shaft 26 is rotatably connected inside the reset bracket 24. A reset torsion spring 27 is provided outside the reset rotating shaft 26, and a torsion spring limiting frame 28 is provided on one side of the reset torsion spring 27. The torsion spring limiting frame 28 contacts one side of the guide seat 19, and a torsion spring limiting foot 29 is provided on the other side of the reset torsion spring 27. A fixed plate 37 is provided on one side of the pedal 3, and the torsion spring limiting foot 29 contacts the fixed plate 37.

[0042] Through the above technical solution, when the doctor steps on the pedal 3, the pedal 3 drives the torsion spring limit foot 29 of the reset torsion spring 27 to rotate, so that the reset torsion spring 27 is in a contracted state; when the doctor releases the pedal 3, the reset torsion spring 27 is in an extended state, and the torsion spring limit foot 29 of the reset torsion spring 27 drives the pedal 3 to rotate upward, thereby facilitating the acceleration of the reset of the pedal 3.

[0043] Reference Fig. 9 In some specific implementations, there are two reset brackets 24 , one side of the two reset brackets 24 is provided with a reset rotation groove 25 , and both ends of the reset rotation shaft 26 are respectively rotatably matched with the reset rotation grooves 25 of the two reset brackets 24 .

[0044] Through the above technical solution, when the reset torsion spring 27 drives the reset rotating shaft 26 to rotate, the two ends of the reset rotating shaft 26 rotate with the reset rotating grooves 25 of the two reset brackets 24 respectively, so as to facilitate guiding the rotation position of the reset rotating shaft 26.

[0045] Reference Figure 2-Figure 8 In some specific embodiments, a mounting groove 9 is provided at the top of the pedal connecting rod 30, and a switch roller 10 is rotatably connected in the mounting groove 9. One side of the switch roller 10 protrudes upward out of the mounting groove 9, and the switch roller 10 rolls with the bottom of the pedal 3. Rotation holes 12 are provided on both sides of the mounting groove 9, and a roller shaft 31 is passed through the inside of the switch roller 10, and the roller shaft 31 rotates with the rotation holes 12 on both sides of the mounting groove 9 respectively.

[0046] Through the above technical solution, when the pedal 3 is stepped on, the pedal 3 drives the switch roller 10 to roll, so that the switch roller 10 drives the pedal connecting rod 30 to rotate downward, thereby reducing the friction between the pedal 3 and the pedal connecting rod 30 through the rolling cooperation between the switch roller 10 and the pedal 3, thereby improving the service life of the pedal 3 and the pedal connecting rod 30.

[0047] Reference Figure 2-Figure 8 In some specific embodiments, two first fixed brackets 4 are provided on the top of the base plate 1, a first rotation groove 6 is opened on one side of the two first fixed brackets 4, a first setting groove 11 is opened inside one end of the pedal connecting rod 30, a first connecting shaft 7 is passed through the first setting groove 11, and both ends of the first connecting shaft 7 are respectively rotatably matched with the first rotation grooves 6 of the two first fixed brackets 4.

[0048] Through the above technical solution, when the pedal connecting rod 30 rotates, the two ends of the first connecting shaft 7 of the pedal connecting rod 30 are respectively rotated and matched with the first rotating grooves 6 of the two first fixed brackets 4, so as to facilitate guiding the rotating position of the pedal connecting rod 30.

[0049] Reference Figure 8 In some specific embodiments, a second setting groove 16 is opened inside the sliding end 38, and a movable shaft 15 is passed through the second setting groove 16. Both ends of the movable shaft 15 protrude out of the second setting groove 16. A guide wheel 33 is provided at the protruding end of the movable shaft 15, and a limiting groove 34 is opened on the outer edge of the guide wheel 33. Two guide grooves 13 are opened inside the other end of the pedal connecting rod 30, and the two guide wheels 33 slide in cooperation with the two guide grooves 13.

[0050] Through the above technical solution, when the labor-saving rotating frame 14 rotates, the guide wheel 33 of the sliding end 38 slides along the guide groove 13, thereby preventing the labor-saving rotating frame 14 from being separated from the pedal connecting rod 30.

[0051] Reference Figure 5-Figure 9In some specific embodiments, two second fixed brackets 5 are provided on the top of the base plate 1, and a second rotation groove 8 is opened on one side of the two second fixed brackets 5. A third setting groove 17 is opened inside the labor-saving rotation frame 14, and a second connecting shaft 18 is passed through the third setting groove 17. The two ends of the second connecting shaft 18 are respectively rotatably matched with the second rotation grooves 8 of the two second fixed brackets 5.

[0052] Through the above technical solution, when the labor-saving rotating frame 14 rotates, the two ends of the second connecting shaft 18 of the rotating end 39 respectively rotate with the second rotating grooves 8 of the two second fixed brackets 5, thereby facilitating the guiding of the rotating position of the labor-saving rotating frame 14.

[0053] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

Claims

1. A labor-saving structure of a foot switch, comprising a bottom plate, a switch valve core and a switch connecting pin are arranged on the top of the bottom plate, the switch connecting pin is slidably matched with the top of the bottom plate, one end of the switch connecting pin faces the switch valve core, a shell is arranged on the top of the bottom plate, a pedal is hinged on one side of the shell, and the characteristics are as follows: A pedal connecting rod is provided on the top of the base plate, and the pedal connecting rod is located below the pedal. One end of the pedal connecting rod is hinged to the top of the base plate, and the other end of the pedal connecting rod is provided with a labor-saving rotating frame, and the labor-saving rotating frame is located between the pedal connecting rod and the switch connecting pin. A sliding end is provided at one end of the labor-saving rotating frame, and the sliding end is slidably connected to the other end of the pedal connecting rod. The other end of the labor-saving rotating frame is provided with a rotating end, and the rotating end is hinged to the top of the base plate. A push protrusion is provided at the bottom of the rotating end, and the push protrusion contacts the other end of the switch connecting pin so that the switch connecting pin is pushed toward the valve core of the switch valve.

2. The labor-saving structure of a foot switch according to claim 1, characterized in that: One end of the piston of the switch valve core is connected to a valve core piston rod, and a return spring is provided outside the valve core piston rod. One end of the return spring is connected to one end of the switch valve core, and the other end of the return spring is connected to one end of the switch connecting pin.

3. The labor-saving structure of a foot switch according to claim 2, characterized in that: A guide seat is provided on the top of the base plate, a sliding groove is provided inside the guide seat, the switch connecting pin is slidably matched with the sliding groove, a limit plate is provided at one end of the switch connecting pin, the size of the limit plate is larger than the size of the sliding groove, and the other end of the reset spring is connected to the limit plate.

4. The labor-saving structure of a foot switch according to claim 3, characterized in that: A reset bracket is provided on the top of the base plate, a reset rotating shaft is rotatably connected inside the reset bracket, a reset torsion spring is provided outside the reset rotating shaft, a torsion spring limiting frame is provided on one side of the reset torsion spring, the torsion spring limiting frame abuts against one side of the guide seat, a torsion spring limiting foot is provided on the other side of the reset torsion spring, a fixed plate is provided on one side of the pedal, and the torsion spring limiting foot abuts against the fixed plate.

5. The labor-saving structure of a foot switch according to claim 4, characterized in that: There are two reset brackets, one side of the two reset brackets is provided with a reset rotation groove, and both ends of the reset rotation shaft are respectively rotationally matched with the reset rotation grooves of the two reset brackets.

6. The labor-saving structure of a foot switch according to claim 1, characterized in that: A mounting groove is provided on the top of the pedal connecting rod, a switch roller is rotatably connected in the mounting groove, one side of the switch roller protrudes upward out of the mounting groove, and the switch roller is rollingly matched with the bottom of the pedal.

7. The labor-saving structure of a foot switch according to claim 6, characterized in that: Rotation holes are provided on both sides of the installation slot, a roller shaft is passed through the interior of the switch roller, and the roller shaft is rotatably matched with the rotation holes on both sides of the installation slot respectively.

8. The labor-saving structure of a foot switch according to claim 1, characterized in that: Two first fixed brackets are provided on the top of the base plate, and a first rotation groove is opened on one side of the two first fixed brackets. A first setting groove is opened inside one end of the pedal connecting rod, and a first connecting shaft is passed through the first setting groove. The two ends of the first connecting shaft are respectively rotatably matched with the first rotation grooves of the two first fixed brackets.

9. The labor-saving structure of a foot switch according to claim 1, characterized in that: A second setting groove is provided inside the sliding end, a movable shaft is passed through the second setting groove, both ends of the movable shaft protrude out of the second setting groove, a guide wheel is provided at the protruding end of the movable shaft, a limiting groove is provided on the outer edge of the guide wheel, and two guide grooves are provided inside the other end of the pedal connecting rod, and the two guide wheels are slidably matched with the two guide grooves.

10. The labor-saving structure of a foot switch according to claim 1, characterized in that: Two second fixed brackets are provided on the top of the base plate, and a second rotation groove is opened on one side of the two second fixed brackets. A third setting groove is opened inside the labor-saving rotating bracket, and a second connecting shaft is passed through the third setting groove. The two ends of the second connecting shaft are respectively rotatably matched with the second rotation grooves of the two second fixed brackets.

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