Pedal system with self-unlocking function

Abstract

The application provides a self-unlocking foot pedal system, and relates to the technical field of trolley foot pedal systems.The self-unlocking foot pedal system comprises a base body, gear shifting mechanisms symmetrically arranged on the front side of the base body, a first central control caster assembly connected to the output end of the gear shifting mechanism on the right side, the gear shifting mechanism on the right side being used for adjusting the gear of the first central control caster assembly, a second central control caster assembly connected to the output end of the gear shifting mechanism on the left side, the gear shifting mechanism on the left side being used for adjusting the gear of the second central control caster assembly, a right foot pedal arranged at the input end of the gear shifting mechanism on the right side, a left foot pedal arranged at the input end of the gear shifting mechanism on the left side, and a gear unlocking mechanism arranged between the gear shifting structure and the base body.In the application, when the foot pedals are pressed downward, the gear of the first central control caster assembly and the second central control caster assembly can be automatically unlocked through the gear unlocking mechanism, and the foot pedals do not need to be lifted upward, so that the operability is improved, and the safety of the foot pedal system is improved.

Description

Technical Field

[0001] This invention relates to the field of trolley pedal systems, and particularly to a pedal system with a self-unlocking function. Background Technology

[0002] Trolleys are commonly used equipment in hospitals. They are typically used to hold temporary medical instruments and are equipped with casters to facilitate the movement of medical instruments and make it easier to examine patients.

[0003] Application CN218876766U discloses a braking mechanism and a mobile medical device. The braking mechanism includes a base, a drive mechanism, at least two transmission mechanisms, and at least two caster assemblies. Each caster assembly and each transmission mechanism is connected in a corresponding manner. The drive mechanism includes a rotating rod rotatably connected to the base and a foot pedal fixed to one side of the rotating rod. The transmission mechanism includes a transmission rod connected to the rotating rod. The caster assemblies are fixed to the base, and each caster assembly contains a brake component connected to the transmission rod of the corresponding transmission mechanism. The rotating rod drives the transmission rod to rotate, and the rotation of the transmission rod controls the braking action of the brake component. The braking mechanism provided in this application allows for simultaneous control of the braking action of multiple caster assemblies by pressing only one foot pedal, making the locking operation of the casters simpler and the braking accuracy higher.

[0004] However, the above-mentioned mechanism requires the user to hook their foot on the foot pedal and lift it upwards when unlocking, which poses a risk of foot injury. In addition, there is no rebound structure, resulting in a stiff shifting problem and a poor user experience. Summary of the Invention

[0005] This invention provides a foot pedal system with a self-unlocking function to solve the technical problems of current foot pedal systems, which require the user to hook the foot on the pedal and lift it upwards to unlock, posing a risk of foot injury, and lacking a rebound structure, resulting in stiff gear shifting.

[0006] To solve the above-mentioned technical problems, the present invention discloses a foot pedal system with a self-unlocking function, comprising: a base body, a gear shifting mechanism symmetrically arranged on the front side of the base body, the output end of the gear shifting mechanism on the right side being connected to a first central control caster assembly, the gear shifting mechanism on the right side being used to adjust the gear of the first central control caster assembly, the output end of the gear shifting mechanism on the left side being connected to a second central control caster assembly, the gear shifting mechanism on the left side being used to adjust the gear of the second central control caster assembly, a right foot pedal being provided at the input end of the gear shifting mechanism on the right side, a left foot pedal being provided at the input end of the gear shifting mechanism on the left side, and a gear unlocking mechanism being provided between the gear shifting mechanism and the base body, the gear unlocking mechanism being used to automatically unlock the gears of the first central control caster assembly and the second central control caster assembly.

[0007] Preferably, the gear sequence of the first central control caster assembly and the second central control caster assembly is different.

[0008] Preferably, the gear shifting mechanism includes a first rotating shaft base located near the center of the front side of the base body and a second rotating shaft base located near the front edge of the base body. A first central control wheel rotating shaft is rotatably connected between the first rotating shaft base and the second rotating shaft base. A central control wheel foot pedal support plate is provided at one end of the first central control wheel rotating shaft near the first rotating shaft base. A reset foot pedal connecting plate is provided at the end of the central control wheel foot pedal support plate away from the first central control wheel rotating shaft. One end of the reset foot pedal connecting plate is rotatably connected to the central control wheel foot pedal support plate through a reset foot pedal rotating shaft. A reset foot pedal spring is provided between the reset foot pedal connecting plate and the central control wheel foot pedal support plate. A right foot pedal is provided on the right reset foot pedal connecting plate, and a left foot pedal is provided on the left reset foot pedal connecting plate.

[0009] Preferably, a torsion spring is fitted on the first central control wheel shaft, with one end of the torsion spring connected to the central control wheel foot pedal support plate and the other end of the torsion spring connected to the base body.

[0010] Preferably, the first central control caster assembly includes a central control caster 1, which is located at the front right of the base body. A stop lever 1 is provided at the upper end of the central control caster 1, and a first adjusting rod is provided inside the stop lever 1. The first adjusting rod is rotatably connected to a first connecting seat, which is fixedly mounted on the base body. The end of the first adjusting rod away from the stop lever 1 is connected to one end of a first connecting plate. The other end of the first connecting plate is hinged to one end of a first connecting rod. The other end of the first connecting rod is hinged to one end of a second connecting plate. The other end of the second connecting plate is connected to the rotating shaft of the first central control wheel.

[0011] Preferably, the second central control caster assembly includes a second central control caster located at the front left of the base body, a third central control caster located at the rear left of the base body, and a fourth central control caster located at the rear right of the base body. A stop lever is located at the upper end of the second central control caster, and a second adjusting rod is located inside the stop lever. The second adjusting rod is rotatably connected to a second connecting seat, which is fixedly mounted on the base body. The end of the second adjusting rod away from the stop lever is connected to one end of a third connecting plate. The other end of the third connecting plate is hinged to a second connecting rod, and the other end of the second connecting rod is hinged to one end of a fourth connecting plate. The other end of the fourth connecting plate is connected to the second central control wheel shaft. The two ends of the second central control wheel shaft are rotatably connected to two third connecting seats respectively. The third connecting seats are symmetrically arranged on the base body. The two ends of the second central control wheel shaft are respectively provided with a third adjusting rod and a fourth adjusting rod. The third adjusting rod is connected to the stop rod three at the upper end of the central control caster three. The fourth adjusting rod is connected to the stop rod four at the upper end of the central control caster four. A fifth connecting plate is provided between the first central control wheel shaft and the second connecting rod. One end of the fifth connecting plate is connected to the first central control wheel shaft, and the other end of the fifth connecting plate is hinged to the second connecting rod.

[0012] Preferably, the gear unlocking mechanism includes a limiting plate, one end of which is fixedly connected to the first central control wheel shaft. An arc-shaped inner groove is provided on the side of the limiting plate near the second shaft base, and an inner hole is provided at the end of the arc-shaped inner groove. The depth of the inner hole is greater than the depth of the arc-shaped inner groove. An unlocking component is provided on the side of the two limiting plates that are far apart from each other. The unlocking component includes an unlocking sleeve base, which is connected to the base body. A positioning bead base is provided inside the unlocking sleeve base, and the positioning bead base is slidably connected to the inner wall of the unlocking sleeve base. A positioning bead is provided at the end of the positioning bead base near the arc-shaped inner groove, and the positioning bead is slidably connected to the inner wall of the arc-shaped inner groove. The positioning bead is adapted to the inner hole. The end of the positioning bead base away from the positioning bead is connected to the inner wall of the unlocking sleeve base via a positioning bead compression spring. An unlocking sleeve cover is provided on the side of the unlocking sleeve base away from the base body, and the interior of the unlocking sleeve cover communicates with the interior of the unlocking sleeve base. A driving component is provided inside the unlocking sleeve cover, and the driving component is used to drive the positioning bead base to slide left and right inside the unlocking sleeve base.

[0013] Preferably, the driving assembly includes an unlocking lever. One end of the unlocking lever is connected to the unlocking sleeve base via an unlocking spring. Several large and small arc-shaped protrusions are alternately arranged on the outer wall of the end of the unlocking lever near the unlocking spring. The other end of the unlocking lever is provided with four first sliders, each in the shape of a right-angled trapezoid. A first inclined surface is provided at the upper end of each first slider. The four first sliders are slidably connected to four sets of guide components on the inner wall of the unlocking sleeve cover. The four sets of guide components are arranged in a circular array about the central axis of the unlocking sleeve cover. Each guide component includes a first groove and a second groove formed on the inner wall of the unlocking sleeve cover. The first groove and the second groove are spaced apart. A first limiting block is provided between the first groove and the second groove. A second inclined surface is provided at the lower end of the first limiting block. The second inclined surface... The first inclined surface is adapted to the second slide groove. A second limiting block is set on the side of the second slide groove away from the first limiting block. A third inclined surface is set at the lower end of the second limiting block. The third inclined surface is adapted to the first inclined surface. The depth of the second slide groove is less than the depth of the first slide groove. The lower end of the second slide groove is inclined and is in the same plane as the third inclined surface. The first slider is slidably connected to the first slide groove. A sliding column is set at the upper end of the unlocking rod. The outer wall of the sliding column is slidably connected to the inner wall of the guide hole at the lower end of the unlocking button. Eight second sliders are set on the outer periphery of the lower end of the unlocking button. Four of the second sliders are slidably connected to the first slide groove. The other four second sliders are slidably connected to the second slide groove. The lower end cross section of the second slider is an isosceles triangle shape. The lower ends of four of the second sliders abut against the first inclined surface of the first slider near the middle position.

[0014] Preferably, the pressing component includes a reset foot pedal plate, which is located between the center console foot pedal support plate and the unlock button. One end of the reset foot pedal plate is rotatably connected to the lower side of the center console foot pedal support plate via a reset foot pedal plate pivot. A sliding hole is provided through the center console foot pedal support plate. The reset foot pedal plate is L-shaped, and the end of the reset foot pedal plate away from the unlock button passes through the sliding hole and abuts against the lower surface of the reset foot pedal connecting plate.

[0015] Preferably, a reset foot pedal pressure plate tension spring is provided between the reset foot pedal pressure plate and the center console wheel foot pedal support plate, with one end of the reset foot pedal pressure plate tension spring connected to the reset foot pedal pressure plate and the other end of the reset foot pedal pressure plate tension spring connected to the center console wheel foot pedal support plate.

[0016] The technical solution of the present invention has the following advantages: The present invention provides a foot pedal system with a self-unlocking function, relating to the technical field of trolley foot pedal systems, including a base body, with gear switching mechanisms symmetrically arranged on the front side of the base body. The output end of the gear switching mechanism on the right side is connected to a first central control caster assembly, and the gear switching mechanism on the right side is used to adjust the gear of the first central control caster assembly. The output end of the gear switching mechanism on the left side is connected to a second central control caster assembly, and the gear switching mechanism on the left side is used to adjust the gear of the second central control caster assembly. A right foot pedal is provided at the input end of the gear switching mechanism on the right side, and a left foot pedal is provided at the input end of the gear switching mechanism on the left side. A gear unlocking mechanism is provided between the gear switching mechanism and the base body. In this invention, when the foot pedal is pressed down, the gear unlocking mechanism can automatically unlock the gears of the first central control caster assembly and the second central control caster assembly without lifting the foot pedal upwards. This solves the problem that existing mechanisms require the user to hook the foot pedal upwards and lift it with force when unlocking, which can damage the instep. By setting up the gear unlocking mechanism, operability is improved, the safety of the foot pedal system is enhanced, and the user experience and comfort are improved.

[0017] Other features and advantages of the invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention may be realized and obtained by means of the means particularly pointed out in the written description and the accompanying drawings.

[0018] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0019] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings:

[0020] Figure 1 This is a schematic diagram of the overall structure of a foot pedal system with self-unlocking function according to the present invention;

[0021] Figure 2 This is a schematic diagram of the gear shifting mechanism in the present invention;

[0022] Figure 3 This is a schematic diagram of the overall structure of the gear unlocking mechanism in this invention;

[0023] Figure 4 This is a partial structural diagram of the gear unlocking mechanism in this invention;

[0024] Figure 5 This is a cross-sectional view of the unlocking state of the gear unlocking mechanism in this invention;

[0025] Figure 6 This is a partially enlarged cross-sectional view of the gear unlocking mechanism in the unlocked state of the present invention;

[0026] Figure 7 This is a cross-sectional view of the gear unlocking mechanism in the locked state in this invention;

[0027] Figure 8 This is a partially enlarged cross-sectional view of the gear unlocking mechanism in the locked state of the present invention;

[0028] Figure 9 This is a schematic diagram of the driving component structure in this invention;

[0029] Figure 10 In this invention Figure 9 A bottom view;

[0030] Figure 11 This is a schematic diagram showing the connection between the unlock button and the unlock lever in this invention;

[0031] Figure 12 This is a schematic diagram of a partial internal structure of the unlocking sleeve cover in this invention;

[0032] Figure 13 In this invention Figure 12 A bottom view.

[0033] In the diagram: 1. Base body; 2. Right foot pedal; 3. Left foot pedal; 4. First central control wheel pivot; 5. Central control wheel foot pedal support plate; 6. Reset foot pedal connecting plate; 7. Reset foot pedal pivot; 8. Reset foot pedal spring; 9. Torsion spring; 10. Central control caster one; 11. First adjusting rod; 12. First connecting plate; 13. First connecting rod; 14. Second connecting plate; 15. Central control caster two; 16. Central control caster three; 17. Central control caster four; 18. Second adjusting rod; 19. Third connecting plate; 20. Second connecting rod; 21. Fourth connecting plate; 22. Second central control wheel pivot; 23. 24. Third adjusting rod; 25. Fourth adjusting rod; 26. Fifth connecting plate; 27. Limiting plate; 28. Unlocking sleeve base; 29. ​​Positioning bead base; 30. Positioning bead; 31. Positioning bead compression spring; 32. Unlocking sleeve cover; 33. Unlocking lever; 34. Unlocking button; 35. Unlocking spring; 36. Reset foot pedal pressure plate; 37. Reset foot pedal pressure plate tension spring; 38. Reset foot pedal pressure plate pivot; 39. First slider; 40. First slide groove; 41. Second slide groove; 42. First limiting block; 43. Second limiting block; 44. Second slider; 101. Gear unlocking mechanism. Detailed Implementation

[0034] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0035] Furthermore, in this invention, the use of terms such as "first" and "second" is for descriptive purposes only and does not specifically refer to any order or sequence, nor is it intended to limit the invention. They are merely used to distinguish components or operations described using the same technical terms and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions and features of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If a combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0036] Example 1:

[0037] This invention provides a foot pedal system with a self-unlocking function, such as... Figures 1-8As shown, it includes: a base body 1, with gear shifting mechanisms symmetrically arranged on the front side of the base body 1. The output end of the gear shifting mechanism on the right is connected to the first central control caster assembly, and the gear shifting mechanism on the right is used to adjust the gear of the first central control caster assembly. The output end of the gear shifting mechanism on the left is connected to the second central control caster assembly, and the gear shifting mechanism on the left is used to adjust the gear of the second central control caster assembly. A right foot pedal 2 is provided at the input end of the gear shifting mechanism on the right, and a left foot pedal 3 is provided at the input end of the gear shifting mechanism on the left. A gear unlocking mechanism 101 is provided between the gear shifting mechanism and the base body 1, and the gear unlocking mechanism 101 is used to automatically unlock the gears of the first central control caster assembly and the second central control caster assembly.

[0038] The gear sequence of the first central control caster assembly and the second central control caster assembly is different;

[0039] The gear shifting mechanism includes a first rotating shaft base located near the center of the front side of the base body 1 and a second rotating shaft base located near the edge of the front side of the base body 1. A first central control wheel rotating shaft 4 is rotatably connected between the first rotating shaft base and the second rotating shaft base. A central control wheel foot pedal support plate 5 is provided at one end of the first central control wheel rotating shaft 4 near the first rotating shaft base. A reset foot pedal connecting plate 6 is provided at the other end of the central control wheel foot pedal support plate 5 away from the first central control wheel rotating shaft 4. One end of the reset foot pedal connecting plate 6 is rotatably connected to the central control wheel foot pedal support plate 5 through a reset foot pedal rotating shaft 7. A reset foot pedal spring 8 is provided between the reset foot pedal connecting plate 6 and the central control wheel foot pedal support plate 5. A right foot pedal 2 is provided on the right reset foot pedal connecting plate 6, and a left foot pedal 3 is provided on the left reset foot pedal connecting plate 6.

[0040] A torsion spring 9 is fitted on the first central control wheel shaft 4. One end of the torsion spring 9 is connected to the central control wheel foot pedal support plate 5, and the other end of the torsion spring 9 is connected to the base body 1.

[0041] The working principle and beneficial effects of the above technical solution are as follows: A gear shifting mechanism is respectively installed on the front side of the base body 1. The gear shifting mechanism on the right side is connected to the first central control caster assembly. Stepping on the right foot pedal 2 adjusts the gear position of the first central control caster assembly. The gear shifting mechanism on the left side is connected to the second central control caster assembly. Stepping on the left foot pedal 3 adjusts the gear position of the second central control caster assembly. Since the gear shifting sequence of the first and second central control caster assemblies is different, when the left foot pedal 3 and the right foot pedal 2 are pressed simultaneously, the gear positions of the first and second central control caster assemblies are different, thus realizing the switching of the three functions of the central control caster. Specifically, taking the gear shifting mechanism on the right side as an example, when the right foot pedal 2 is pressed, the right foot pedal 2 resets... The foot pedal connecting plate 6 compresses the reset foot pedal spring 8, which in turn moves the central control wheel foot pedal support plate 5 downward. The downward movement of the central control wheel foot pedal support plate 5 causes the first central control wheel shaft 4 to rotate between the first shaft base and the second shaft base, thereby driving the first central control caster assembly on the right side to adjust the gear. When the first central control wheel shaft 4 rotates, the torsion spring 9 twists. Through the elasticity of the torsion spring 9, the problems of stiff gear shifting and uneven gear shifting force can be solved, and the buffering and shock absorption functions are realized, enhancing the operator's experience and comfort. When the first central control caster assembly needs to be unlocked, continue to press the right foot pedal 2 downward, and the first central control caster assembly can be automatically unlocked through the gear unlocking mechanism 101. The operation is simple and more labor-saving. In this invention, by stepping down on the foot pedal, the gear unlocking mechanism 101 can automatically unlock the gears of the first central control caster assembly and the second central control caster assembly without lifting the foot pedal upwards. This solves the problem that existing mechanisms require the user to hook their foot on the foot pedal and lift it upwards, which can damage the foot. By setting the gear unlocking mechanism 101, operability is improved, the safety of the foot pedal system is enhanced, and the user experience and comfort are increased.

[0042] Example 2

[0043] Based on the above embodiment 1, as follows Figure 2 As shown, the first central control caster assembly includes a central control caster 10, which is located at the front right of the base body 1. A stop bar is provided at the upper end of the central control caster 10, and a first adjusting rod 11 is provided inside the stop bar. The first adjusting rod 11 is rotatably connected to a first connecting seat, which is fixedly mounted on the base body 1. The end of the first adjusting rod 11 away from the stop bar is connected to one end of the first connecting plate 12. The other end of the first connecting plate 12 is hinged to one end of the first connecting rod 13. The other end of the first connecting rod 13 is hinged to one end of the second connecting plate 14. The other end of the second connecting plate 14 is connected to the first central control wheel shaft 4.

[0044] The second central control caster assembly includes a second central control caster 15 located at the front left of the base body 1, a third central control caster 16 located at the rear left of the base body 1, and a fourth central control caster 17 located at the rear right of the base body 1. A stop lever 2 is provided at the upper end of the second central control caster 15, and a second adjusting rod 18 is provided inside the stop lever 2. The second adjusting rod 18 is rotatably connected to a second connecting seat, which is fixedly mounted on the base body 1. One end of the second adjusting rod 18 away from the stop lever 2 is connected to one end of a third connecting plate 19. The other end of the third connecting plate 19 is hinged to a second connecting rod 20, and the other end of the second connecting rod 20 is hinged to one end of a fourth connecting plate 21. The other end of the connecting plate 21 is connected to the second central control wheel shaft 22. The two ends of the second central control wheel shaft 22 are rotatably connected to two third connecting seats respectively. The third connecting seats are symmetrically arranged on the base body 1. The two ends of the second central control wheel shaft 22 are respectively provided with a third adjusting rod 23 and a fourth adjusting rod 24. The third adjusting rod 23 is connected to the stop rod 3 at the upper end of the central control caster 3 16. The fourth adjusting rod 24 is connected to the stop rod 4 at the upper end of the central control caster 4 17. A fifth connecting plate 25 is provided between the first central control wheel shaft 4 and the second connecting rod 20. One end of the fifth connecting plate 25 is connected to the first central control wheel shaft 4, and the other end of the fifth connecting plate 25 is hinged to the second connecting rod 20.

[0045] The working principle and beneficial effects of the above technical solution are as follows: The first central control caster assembly includes central control caster 10, and the second central control caster assembly includes central control caster 2 15, central control caster 3 16, and central control caster 4 17. Central control caster 10, central control caster 2 15, central control caster 3 16, and central control caster 4 17 all adopt existing three-speed, three-function central control casters. The adjustment angle of the central control caster is 30° / speed, and the speeds from top to bottom are directional, swivel, and... The locking mechanism allows the center control caster lever to be rotated 180° axially, changing its position to locked, swivel, or directional. Therefore, in this invention, the levers of center control caster 10, center control caster 2, center control caster 3, and center control caster 4 are adjusted to opposite directions. When the right foot pedal 2 and left foot pedal 3 are pressed down, the first and second center control caster assemblies are in different positions, allowing the four center control casters under the base body 1 to switch between three functions. Taking the second central control caster assembly as an example, when the left foot pedal 3 is pressed, the first central control wheel shaft 4 rotates, driving the second connecting rod 20 to move through the fifth connecting plate 25. The second connecting rod 20 drives the second adjusting rod 18 to rotate through the third connecting plate 19. The second adjusting rod 18 drives the second stop lever to rotate. At the same time, the second connecting rod 20 drives the second central control wheel shaft 22 to rotate through the fourth connecting plate 21. The second central control wheel shaft 22 drives the third adjusting rod 23 and the fourth adjusting rod 24 to rotate respectively. The third adjusting rod 23 drives the third stop lever to rotate, and the fourth adjusting rod 24 drives the fourth stop lever to rotate. This achieves synchronous adjustment of the stop levers of the central control caster 2 15, central control caster 3 16, and central control caster 4 17. Here, only the central control caster 2 15 can be set, which can also achieve the effect of switching the gear position separately with the central control caster 1 10. Through the above scheme, the switching of the three functions of the central control caster can be realized, making the use of the medical trolley more convenient and reliable.

[0046] The selection of the torsion spring 9 requires comprehensive consideration of parameters such as its torque. For example, the torque and elastic force of the torsion spring 9 must be greater than the force required for the corresponding gear position. This ensures that the gear position can be restored by the restoring force of the torsion spring 9 when the gear is unlocked. Based on the three-speed, three-function central control caster selected in this invention, the torque required for gear switching is as follows:

[0047] 1. Switching from fully free to fully locked, torque value: 5.5 Nm;

[0048] 2. Switching from fully locked to fully free, the torque value is 4.3 Nm;

[0049] 3. Switching from fully free-flowing to directional, the torque value is: 1.8 Nm;

[0050] 4. Switching from directional to fully free, the torque value is 2.6 Nm.

[0051] Example 3

[0052] Based on Example 1 or 2, such as Figures 3-13 As shown, the gear unlocking mechanism 101 includes a limiting plate 26. One end of the limiting plate 26 is fixedly connected to the first central control wheel shaft 4. An arc-shaped inner groove is provided on the side of the limiting plate 26 near the second shaft base. An inner hole is provided at the end of the arc-shaped inner groove, and the depth of the inner hole is greater than the depth of the arc-shaped inner groove. An unlocking component is provided on one side away from each other of the two limiting plates 26. The unlocking component includes an unlocking sleeve base 27, which is connected to the base body 1. A positioning bead base 28 is provided inside the unlocking sleeve base 27, and the positioning bead base 28 is slidably connected to the inner wall of the unlocking sleeve base 27. A positioning bead 29 is provided at one end of the positioning bead base 28 near the inner groove of the arc. The positioning bead 29 is slidably connected to the inner wall of the inner groove of the arc. The positioning bead 29 is adapted to the inner hole. The end of the positioning bead base 28 away from the positioning bead 29 is connected to the inner wall of the unlocking sleeve base 27 through the positioning bead compression spring 30. An unlocking sleeve cover 31 is provided on the side of the unlocking sleeve base 27 away from the base body 1. The inside of the unlocking sleeve cover 31 is connected to the inside of the unlocking sleeve base 27. A driving component is provided inside the unlocking sleeve cover 31. The driving component is used to drive the positioning bead base 28 to slide left and right inside the unlocking sleeve base 27.

[0053] The driving assembly includes an unlocking lever 32. One end of the unlocking lever 32 is connected to the unlocking sleeve base 27 via an unlocking spring 34. Several large and small arc-shaped protrusions are alternately arranged on the outer wall of the end of the unlocking lever 32 near the unlocking spring 34. Four first sliders 39 are provided at the other end of the unlocking lever 32. Each first slider 39 is in the shape of a right-angled trapezoid and has a first inclined surface at its upper end. The four first sliders 39 are slidably connected to four sets of guide components on the inner wall of the unlocking sleeve cover 31. The four sets of guide components are arranged in a circular array about the central axis of the unlocking sleeve cover 31. The guide components include those formed on the unlocking sleeve. The inner wall of the cover 31 has a first sliding groove 40 and a second sliding groove 41, which are spaced apart. A first limiting block 42 is provided between the first sliding groove 40 and the second sliding groove 41. A second inclined surface is provided at the lower end of the first limiting block 42, which is adapted to the first inclined surface. A second limiting block 43 is provided on the side of the second sliding groove 41 away from the first limiting block 42. A third inclined surface is provided at the lower end of the second limiting block 43, which is adapted to the first inclined surface. The depth of the second sliding groove 41 is less than the depth of the first sliding groove 40, and the lower end of the second sliding groove 41 is inclined and is on the same plane as the third inclined surface. The first slider 39 and the first... A sliding groove 40 is connected vertically. A sliding post is provided at the upper end of the unlocking lever 32. The outer wall of the sliding post is slidably connected to the inner wall of the guide hole at the lower end of the unlocking button 33. Eight second sliders 44 are provided on the outer periphery of the lower end of the unlocking button 33. Four of the second sliders 44 are slidably connected vertically to the first sliding groove 40, and the other four are slidably connected vertically to the second sliding groove 41. The lower cross-section of the second sliders 44 is an isosceles triangle shape. The lower ends of four of the second sliders 44 abut against the unlocking lever 32, the unlocking sleeve cover 31, the unlocking button 33, the unlocking lever 32, and the unlocking spring 34 near the middle of the first inclined surface of the first slider 39. The sleeve base 27 unlocking lever 32 unlocking button 33 unlocking lever 32 unlocking lever 32 unlocking sleeve cover 31 unlocking button 33 pressing assembly includes a reset foot pedal plate 35, the reset foot pedal plate 35 is located between the central control wheel foot pedal support plate 5 and the unlocking button 33, one end of the reset foot pedal plate 35 is rotatably connected to the lower side of the central control wheel foot pedal support plate 5 through the reset foot pedal plate pivot 38, a sliding hole is provided through the central control wheel foot pedal support plate 5, the reset foot pedal plate 35 is L-shaped, the end of the reset foot pedal plate 35 away from the unlocking button 33 passes through the sliding hole and abuts against the lower surface of the reset foot pedal connecting plate 6;

[0054] A reset foot pedal pressure plate tension spring 37 is provided between the reset foot pedal pressure plate 35 and the center control wheel foot pedal support plate 5. One end of the reset foot pedal pressure plate tension spring 37 is connected to the reset foot pedal pressure plate 35, and the other end of the reset foot pedal pressure plate tension spring 37 is connected to the center control wheel foot pedal support plate 5.

[0055] The working principle and beneficial effects of the above technical solution are as follows: When the foot pedal system performs the gear switching and locking function: central control caster 10, central control caster 2 15, central control caster 3 16, and central control caster 4 17 are divided into two groups according to the control function. Central control caster 10 is arranged at the right front of the equipment and its function is controlled independently by the right foot pedal 2. Since the right foot pedal 2 is fixed to the center control wheel foot pedal support plate 5, when the right foot pedal 2 is pressed, the right foot pedal 2 drives the center control wheel foot pedal support plate 5 to rotate downwards by 30° along the axis of the first center control wheel shaft 4. At this time, the force is transmitted to the first adjusting rod 11 through the second connecting plate 14, the first connecting rod 13, and the first connecting plate 12, thereby driving the gear lever of the center control caster 10 to rotate downwards, realizing the gear adjustment of the center control caster 10. The limit plate 26 is fixed on the first center control wheel shaft 4 and moves synchronously with the first center control wheel shaft 4. The reset foot pedal pressure plate 35 and the center control wheel foot pedal support plate 5 are connected by the reset foot pedal pressure plate shaft 38. Next, the reset foot pedal pressure plate 35 can rotate around the reset foot pedal pressure plate pivot 38 on the center control wheel foot pedal support plate 5; the reset foot pedal connecting plate 6 and the center control wheel foot pedal support plate 5 are connected by the reset foot pedal pivot 7, and the reset foot pedal connecting plate 6 can rotate around the reset foot pedal pivot 7 on the center control wheel foot pedal support plate 5, thereby ensuring the linkage of the entire unlocking mechanism; when the left foot pedal 3 or the right foot pedal 2 is pressed, the reset foot pedal connecting plate 6 is driven to rotate along the reset foot pedal pivot 7, which in turn drives the reset foot pedal pressure plate 35 to rotate along the reset foot pedal pressure plate pivot 38, so that the reset foot pedal pressure plate 35 gradually contacts the unlock button 33;As you continue to press the left foot pedal 3 or right foot pedal 2, while engaging the gear shift via the central control wheel, the reset foot pedal pressure plate 35 and the unlock button 33 change from contact to compression. The unlock button 33 drives the unlock lever 32 to slide within the unlock sleeve cover 31. As the unlock button 33 slides along the first slide groove 40 and the second slide groove 41, the second slider 44, which abuts against the first slider 39 at the lower end of the unlock button 33, can drive the first slider 39 to slide downwards along the first slide groove 40. After the first slider 39 slides until it separates from the first slide groove 40, the unlock spring 34... Under the elastic force, the first inclined surface and the third inclined surface are in contact. The first inclined surface slides along the third inclined surface and slides to the lower end of the second groove 41. Since the depth of the second groove 41 is less than the depth of the first groove 40, the first slider 39 cannot slide into the second groove 41. The first slider 39 is blocked by the first limiting block 42. During the sliding of the first inclined surface along the third inclined surface, the first slider 39 drives the unlocking lever 32 to rotate, thereby causing the large arc protrusion of the unlocking lever 32 to contact the positioning bead base 28. The large arc protrusion drives the unlocking lever 32 to rotate. The positioning bead base 28 moves closer to the limiting plate 26, and the positioning bead 29 protrudes outward. At this time, overcoming the force of the torsion spring 9, the first central control wheel shaft 4 drives the limiting plate 26 to rotate downward. The arc-shaped inner groove of the limiting plate 26 engages with the positioning bead 29, and the limiting plate 26 rotates 30° along the positioning bead 29, thereby causing the central control wheel foot pedal support plate 5 to move downward by 30°. When the positioning bead 29 encounters the inner hole of the limiting plate 26, because the depth of the inner hole is greater than the depth of the arc-shaped inner groove of the limiting plate 26, the positioning bead... 29 will spring up and engage with the inner hole of the limiting plate 26, thus locking it in place. Because the first limiting block 42 prevents the first slider 39 from sliding into the first groove 40, the unlocking lever 32 is stabilized below the second groove 41, and the gear unlocking mechanism 101 enters the locked state. At this time, when the right foot pedal 2 is pressed down alone, the first set of individual central control casters 10 is in a directional state. Meanwhile, regardless of the state of the other set of central control casters 15, 16, and 17, the equipment trolley can only move forward or backward in a directional manner.

[0056] Similarly, the remaining central control casters 15, 16, and 17 are connected to form a group. Since the left foot pedal 3 is fixed to the central control wheel foot pedal support plate 5, when the left foot pedal 3 is pressed, the left foot pedal 3 drives the central control wheel foot pedal support plate 5 to rotate downward 30° along the axis of the first central control wheel shaft 4. At this time, the force is transmitted to the second adjusting rod 18 through the fifth connecting plate 25, the second connecting rod 20, and the third connecting plate 19. At the same time, the force is transmitted to the second central control wheel shaft 22 through the fifth connecting plate 25, the second connecting rod 20, and the fourth connecting plate 21, thereby simultaneously driving the central control casters 15, 16, and 17 to rotate downward. During this period, when the left foot pedal 3 or the right foot pedal 2 is pressed, the reset foot pedal connecting plate 6 rotates along the reset foot pedal pivot 7, which in turn rotates the reset foot pedal pressure plate 35 along the reset foot pedal pressure plate pivot 38. Continuing to press the left foot pedal 3 or the right foot pedal 2, while engaging the central control wheel, the reset foot pedal pressure plate 35 changes from contact to compression with the unlock button 33. The unlock button 33 causes the unlock lever 32 to slide within the unlock sleeve cover 31. As the unlock button 33 slides along the first slide groove 40 and the second slide groove 41, the second slider 44, which abuts against the first slider 39 at the lower end of the unlock button 33, can drive the first slider 39 to slide downwards along the first slide groove 40. After the first slider 39 slides until it separates from the first slide groove 40, under the elastic force of the unlock spring 34, the first inclined surface and the third inclined surface come into contact. The first inclined surface slides along the third inclined surface and slides to the lower end of the second slide groove 41. Since the depth of the second slide groove 41 is less than the depth of the first slide groove 40... This prevents the first slider 39 from sliding into the second groove 41. The first slider 39 is blocked by the first limiting block 42. During the sliding process of the first inclined surface along the third inclined surface, the first slider 39 drives the unlocking lever 32 to rotate, thereby causing the large arc protrusion of the unlocking lever 32 to contact the positioning bead base 28. The large arc protrusion drives the positioning bead base 28 to move closer to the limiting plate 26, and the positioning bead 29 protrudes outward. At this time, under the force of the torsion spring 9, the first central control wheel shaft 4 drives the limiting plate 26 to rotate downward. The arc inner groove of the limiting plate 26 cooperates with the positioning bead 29. The limiting plate 26 rotates 30° along the positioning bead 29, thereby causing the central control wheel foot pedal support plate 5 to move downward by 30°. When the positioning bead 29 encounters the inner hole of the limiting plate 26, because the depth of the inner hole is greater than the depth of the arc inner groove of the limiting plate 26, the positioning bead 29 will bounce up and lock into the inner hole of the limiting plate 26, thus completing the locking. When the left foot pedal 3 is pressed down, the second set of central control casters 15, 16, and 17 are locked. At the same time, regardless of the state of the single set of central control casters 10, the equipment trolley remains locked.

[0057] When the pedal system's gear unlocking mechanism 101 performs the gear unlocking function (Note: this includes the following situations: a. the left center console wheel has completed the gear shifting and locking function; b. the right center console wheel has completed the gear shifting and locking function; only one of these situations is used as an example for the invention's unlocking description), continuing to press down on the pedal triggers the gear unlocking mechanism 101. The specific working principle is as follows: When the left pedal 3 or the right pedal 2 is pressed, the reset pedal connecting plate 6 is driven to rotate along the reset pedal shaft 7, thereby driving the reset pedal pressure plate 35 along the reset pedal... The pressure plate shaft 38 rotates, causing the reset foot pedal pressure plate 35 and the unlock button 33 to change from contact to compression. The unlock button 33 drives the unlock lever 32 to slide down and rotate within the unlock sleeve cover 31. The second slider 44, located in the second slide groove 41, slides down along the second slide groove 41 and contacts the first slider 39 near the middle position. Then, the second slider 44 drives the first slider 39 to move downward and drives the unlock lever 32 to slide downward. When the first slider 39 slides to the lower end of the first limit block 42, under the action of the unlock spring 34, the first inclined surface and the second inclined surface come into contact. The slider slides along the second inclined plane, causing the first slider 39 to slide into the first groove 40. Under the action of the unlocking spring 34, the first slider 39 slides to the upper end of the first groove 40, causing the unlocking lever 32 to return to its original position. At this time, the small arc protrusion of the unlocking lever 32 contacts the positioning bead base 28, which applies a rebound force to the compressed positioning bead spring 30, causing the positioning bead base 28 to move closer to the center of the unlocking sleeve base 27. At this time, under the action of the torsion spring 9, the limiting plate 26 applies a shearing force to the positioning bead 29, causing the positioning bead 29 to move towards the center of the unlocking sleeve base 27. The locking sleeve base 27 is recessed inward, causing the limiting plate 26 to rotate 30° along the positioning bead 29. This causes the center control wheel foot pedal support plate 5 to rotate upward by 30°, allowing it to unlock and reset under the force of the torsion spring 9. Since the torque of the torsion spring 9 is greater than the values ​​for switching from full lock to full free and from directional to full free, the gear position will automatically switch from full lock to full free or from directional to full free, thereby lifting the center control wheel and completing the gear unlocking function, entering the unlocked state.To unlock, simply press the left foot pedal 3 or the right foot pedal 2 all the way down and release your foot. This will unlock the central control caster pedal, allowing the pedal to automatically switch from fully locked to fully free or from directional to fully free. By setting up the pedal unlocking mechanism 101, the mutual rotation and cooperation between the unlocking sleeve cover 31, the unlocking lever 32, and the unlocking sleeve base 27 will enable the axial movement of the positioning bead 29 and the movement of its related positions. The locking and unlocking functions will be achieved through the enclosing relationship between the positioning bead 29 and the inner hole of the limit plate 26. By pressing the foot pedal down, the pedals of the first and second central control caster assemblies will be automatically unlocked without lifting the foot pedal. This solves the problem of existing mechanisms requiring the user to hook the foot pedal and lift it up, which can damage the foot. This improves operability, enhances the safety of the pedal system, and increases the user's experience and comfort.

[0058] This invention can be applied not only to medical ultrasound trolleys, but also to various medical trolleys, and to the three-speed three-function, three-speed two-function, and two-speed two-function central control caster foot pedal locking and unlocking functions of trolleys and carts in various fields and industries. Therefore, this invention is not limited to use in medical equipment; it can be used in trolleys and carts in various fields and industries as well. Different combinations of central control casters are also possible, such as: one set on the left, with one fully free to fully locked front and rear central control caster, and one set on the right, with one fully free to oriented front and rear central control caster; another set on the left, with one fully free to oriented front and rear central control caster, and one set on the right, with one fully free to fully locked front and rear central control caster; another set on the left, with one fully free to fully locked left front, left rear, and right rear central control caster, and one set on the right, with one fully free to oriented right front central control caster; and another set on the left, with one fully free to oriented right front central control caster, and one set on the right, with one fully free to fully locked left front, left rear, and right rear central control caster.

[0059] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0060] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0061] Although embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the specification and embodiments. They can be applied to various fields suitable for the present invention. Other modifications can be easily made by those skilled in the art. Therefore, without departing from the general concept defined by the claims and their equivalents, the present invention is not limited to the specific details and illustrations shown and described herein.

Claims

1. A foot pedal system with a self-unlocking function, characterized in that, include: The base body (1) has a gear switching mechanism symmetrically arranged on the front side. The output end of the gear switching mechanism on the right side is connected to the first central control caster assembly. The gear switching mechanism on the right side is used to adjust the gear of the first central control caster assembly. The output end of the gear switching mechanism on the left side is connected to the second central control caster assembly. The gear switching mechanism on the left side is used to adjust the gear of the second central control caster assembly. The input end of the gear switching mechanism on the right side is equipped with a right foot pedal (2), and the input end of the gear switching mechanism on the left side is equipped with a left foot pedal (3). A gear unlocking mechanism (101) is set between the gear switching mechanism and the base body (1). The gear unlocking mechanism (101) is used to automatically unlock the gears of the first central control caster assembly and the second central control caster assembly. The gear shifting mechanism includes a first rotating shaft base located near the center of the front side of the base body (1) and a second rotating shaft base located near the edge of the front side of the base body (1). A first central control wheel rotating shaft (4) is rotatably arranged between the first rotating shaft base and the second rotating shaft base. A central control wheel foot pedal support plate (5) is arranged at one end of the first central control wheel rotating shaft (4) near the first rotating shaft base. A reset foot pedal connecting plate (6) is arranged at one end of the central control wheel foot pedal support plate (5) away from the first central control wheel rotating shaft (4). One end of the reset foot pedal connecting plate (6) is rotatably connected to the central control wheel foot pedal support plate (5) through a reset foot pedal rotating shaft (7). A reset foot pedal spring (8) is arranged between the reset foot pedal connecting plate (6) and the central control wheel foot pedal support plate (5). A right foot pedal (2) is arranged on the right reset foot pedal connecting plate (6), and a left foot pedal (3) is arranged on the left reset foot pedal connecting plate (6). The second central control caster assembly includes a central control caster two (15) located at the front left of the base body (1), a central control caster three (16) located at the rear left of the base body (1), and a central control caster four (17) located at the rear right of the base body (1). A stop lever two is provided at the upper end of the central control caster two (15), and a second adjusting rod (18) is provided inside the stop lever two. The second adjusting rod (18) is rotatably connected to the second connecting seat, and the second connecting seat is fixedly installed on the base body (1). The end of the second adjusting rod (18) away from the stop lever two is connected to one end of the third connecting plate (19), and the other end of the third connecting plate (19) is hinged to the second connecting rod (20). The other end of the second connecting rod (20) is hinged to one end of the fourth connecting plate (21). (21) The other end is connected to the second central control wheel shaft (22). The two ends of the second central control wheel shaft (22) are rotatably connected to two third connecting seats respectively. The third connecting seats are symmetrically arranged on the base body (1). The two ends of the second central control wheel shaft (22) are respectively provided with a third adjusting rod (23) and a fourth adjusting rod (24). The third adjusting rod (23) is connected to the stop bar three at the upper end of the central control caster three (16). The fourth adjusting rod (24) is connected to the stop bar four at the upper end of the central control caster four (17). A fifth connecting plate (25) is provided between the first central control wheel shaft (4) and the second connecting rod (20). One end of the fifth connecting plate (25) is connected to the first central control wheel shaft (4). The other end of the fifth connecting plate (25) is hinged to the second connecting rod (20).

2. The foot pedal system with self-unlocking function according to claim 1, characterized in that, The gear sequence of the first central control caster assembly and the second central control caster assembly is different.

3. A foot pedal system with self-unlocking function according to claim 1, characterized in that, A torsion spring (9) is fitted on the first central control wheel shaft (4). One end of the torsion spring (9) is connected to the central control wheel foot pedal support plate (5), and the other end of the torsion spring (9) is connected to the base body (1).

4. A foot pedal system with self-unlocking function according to claim 3, characterized in that, The first central control caster assembly includes a central control caster (10), which is located at the front right of the base body (1). A stop bar is provided at the upper end of the central control caster (10), and a first adjusting rod (11) is provided inside the stop bar. The first adjusting rod (11) is rotatably connected to the first connecting seat, and the first connecting seat is fixedly installed on the base body (1). The end of the first adjusting rod (11) away from the stop bar is connected to one end of the first connecting plate (12). The other end of the first connecting plate (12) is hinged to one end of the first connecting rod (13). The other end of the first connecting rod (13) is hinged to one end of the second connecting plate (14). The other end of the second connecting plate (14) is connected to the first central control wheel shaft (4).

5. A foot pedal system with self-unlocking function according to claim 3, characterized in that, The gear unlocking mechanism (101) includes a limiting plate (26). One end of the limiting plate (26) is fixedly connected to the first central control wheel shaft (4). The limiting plate (26) has an arc-shaped inner groove on the side near the second shaft base. An inner hole is provided at the end of the arc-shaped inner groove. The depth of the inner hole is greater than the depth of the arc-shaped inner groove. The two limiting plates (26) are set with an unlocking component on the side away from each other. The unlocking component includes an unlocking sleeve base (27). The unlocking sleeve base (27) is connected to the base body (1). A positioning bead base (28) is provided inside the unlocking sleeve base (27). The positioning bead base (28) is slidably connected to the inner wall of the unlocking sleeve base (27). A positioning bead (29) is provided at one end of the seat (28) near the inner groove of the arc. The positioning bead (29) is slidably connected to the inner wall of the inner groove of the arc. The positioning bead (29) is adapted to the inner hole. The end of the positioning bead base (28) away from the positioning bead (29) is connected to the inner wall of the unlocking sleeve base (27) through the positioning bead compression spring (30). The unlocking sleeve base (27) is provided with an unlocking sleeve cover (31) on the side away from the base body (1). The inside of the unlocking sleeve cover (31) is connected to the inside of the unlocking sleeve base (27). A driving component is provided inside the unlocking sleeve cover (31). The driving component is used to drive the positioning bead base (28) to slide left and right inside the unlocking sleeve base (27).

6. A foot pedal system with self-unlocking function according to claim 5, characterized in that, The drive assembly includes an unlocking lever (32), one end of which is connected to the unlocking sleeve base (27) via an unlocking spring (34). Several large and small arc-shaped protrusions are alternately arranged on the outer wall of the end of the unlocking lever (32) near the unlocking spring (34). Four first sliders (39) are provided at the other end of the unlocking lever (32). Each first slider (39) is in the shape of a right-angled trapezoid, with a first inclined surface at its upper end. The four first sliders (39) are respectively connected to the unlocking sleeve base. Four sets of guide components are slidably connected on the inner wall of the cover (31). The four sets of guide components are arranged in a ring array about the central axis of the unlocking sleeve cover (31). The guide components include a first slide groove (40) and a second slide groove (41) opened on the inner wall of the unlocking sleeve cover (31). The first slide groove (40) and the second slide groove (41) are spaced apart. A first limiting block (42) is set between the first slide groove (40) and the second slide groove (41). A second inclined surface is set at the lower end of the first limiting block (42). The surface is adapted to the first inclined surface. The second sliding groove (41) is provided with a second limiting block (43) on the side away from the first limiting block (42). The lower end of the second limiting block (43) is provided with a third inclined surface, which is adapted to the first inclined surface. The depth of the second sliding groove (41) is less than the depth of the first sliding groove (40), and the lower end of the second sliding groove (41) is inclined and is on the same plane as the third inclined surface. The first slider (39) is connected to the first sliding groove (40) by sliding up and down. The upper end of the unlocking rod (32) is provided with a sliding column. The outer wall of the sliding column is slidably connected to the inner wall of the guide hole at the lower end of the unlock button (33). Eight second sliders (44) are provided on the outer periphery of the lower end of the unlock button (33). Four of the second sliders (44) are slidably connected to the first slide groove (40) and the other four second sliders (44) are slidably connected to the second slide groove (41). The lower cross section of the second slider (44) is an isosceles triangle shape. The lower ends of four of the second sliders (44) abut against the first inclined surface of the first slider (39) near the middle position.

7. A foot pedal system with self-unlocking function according to claim 5, characterized in that, The pressing assembly includes a reset foot pedal plate (35), which is located between the central control wheel foot pedal support plate (5) and the unlock button (33). One end of the reset foot pedal plate (35) is rotatably connected to the lower side of the central control wheel foot pedal support plate (5) through the reset foot pedal plate pivot (38). A sliding hole is provided through the central control wheel foot pedal support plate (5). The reset foot pedal plate (35) is L-shaped. The end of the reset foot pedal plate (35) away from the unlock button (33) passes through the sliding hole and abuts against the lower surface of the reset foot pedal connecting plate (6).

8. A foot pedal system with self-unlocking function according to claim 7, characterized in that, A reset foot pedal pressure plate tension spring (37) is provided between the reset foot pedal pressure plate (35) and the center control wheel foot pedal support plate (5). One end of the reset foot pedal pressure plate tension spring (37) is connected to the reset foot pedal pressure plate (35), and the other end of the reset foot pedal pressure plate tension spring (37) is connected to the center control wheel foot pedal support plate (5).

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