Pedal and treadle conversion structure

Abstract

The present invention relates to a pedal and tread bar conversion structure, including a stepping module, side plates, a support tube, and a locking pin. The stepping module is provided with a sliding channel having a diameter larger than that of the support tube. The stepping module is provided with a first stepping surface and a second stepping surface, and the area of the first stepping surface is larger than that of the second stepping surface. The side plates are provided with arc-shaped chutes. One end of the support tube is connected to the side plates, and the other end of the support tube extends into the sliding channel. A locking pin is arranged at a position of the stepping module corresponding to the arc-shaped chute. The locking pin extends into the arc-shaped chute and slides along the arc-shaped chute. The locking pin drives the stepping module to rotate around the support tube and move the position of the stepping module, so that either the first stepping surface or the second stepping surface of the stepping module serves as the stepping surface of the stepping module. In the tread bar state, it is convenient for users to fold or store the ladder, thus forming a ladder that is both convenient for users to stand on and easy to fold or store.

Description

Technical Field

[0001] The present invention relates to the field of ladders, and particularly to a pedal and tread rod conversion structure. Background Art

[0002] The advantages of the tread rod are: it occupies a small space in the ladder, saves space, reduces the packaging size, lowers the transportation cost, and it is easy to realize the multi-functional design of the ladder.

[0003] The disadvantages of the tread rod are: the stepping area is small. When the user works for a long time, the standing surface is easy to cause the feet to feel uncomfortable, and the stepping area is small, so the user is prone to stepping over, slipping, etc., resulting in accidents.

[0004] The advantages of the pedal are: the stepping surface is wider, which allows the user to exert force more easily with the feet, can choose a comfortable working state, and is safer to use.

[0005] The disadvantages of the pedal are: it occupies a large space, it is not easy to realize the multi-functional design, the overall ladder structure is single, and currently there are very few ladders that can achieve multiple functions and are pedals at the same time. Summary of the Invention

[0006] The purpose of the present invention is to provide a pedal and tread rod conversion structure that can freely convert between a tread rod and a pedal and has a simple conversion.

[0007] The purpose of the present invention is achieved as follows:

[0008] A pedal and tread rod conversion structure includes a stepping module, side plates, support pipes and locking pins. The stepping module is provided with a sliding channel whose diameter is larger than the diameter of the support pipe. The stepping module is provided with a first stepping surface and a second stepping surface, and the area of the first stepping surface is larger than the area of the second stepping surface;

[0009] The side plates are provided with arc-shaped chutes. One end of the support pipe is connected to the side plates, and the other end of the support pipe extends into the sliding channel. The stepping module is provided with locking pins corresponding to the positions of the arc-shaped chutes. The locking pins extend into the arc-shaped chutes and slide along the arc-shaped chutes. The locking pins drive the stepping module to rotate around the support pipe and move the position of the stepping module, so that the first stepping surface or the second stepping surface of the stepping module serves as the stepping surface of the stepping module.

[0010] The user pushes the stepping module, causing the locking pin to slide along the arc-shaped chute, resulting in the stepping module rotating around the support pipe and moving the position of the stepping module. When the locking pin slides to the upper end of the arc-shaped chute, the first stepping surface of the stepping module faces upward to form the stepping surface of the stepping module, constituting the pedal. Since the stepping area of the pedal is relatively large, when in the pedal state, it is more comfortable for the user to stand on the pedal of the ladder. When the locking pin slides to the lower end of the arc-shaped chute, the second stepping surface of the stepping module faces upward to form the stepping surface of the stepping module, constituting the tread bar. Since the tread bar occupies less space, it is convenient for the user to fold or store the ladder in the tread bar state, thus forming a ladder that is both convenient for the user to stand on and easy to fold or store.

[0011] The object of the present invention can also be solved by the following technical measures:

[0012] Further, it also includes a ladder frame and a connecting rod. The connecting rod passes through the support pipe, and both ends of the connecting rod are respectively connected to the ladder frame, realizing the installation of the stepping module and the side plate on the ladder frame. The upper insertion hole is opened at the upper position of the ladder frame corresponding to the arc-shaped chute, and the lower insertion hole is opened at the lower position of the ladder frame corresponding to the arc-shaped chute.

[0013] The stepping module and the side plate are fixed in the ladder frame through the connecting rod, and the connection is more stable and reliable. Moreover, the upper insertion hole is opened at the upper position of the ladder frame corresponding to the arc-shaped chute. When the locking pin moves to the upper end of the arc-shaped chute, the stepping module constitutes the pedal, and the locking pin is inserted into the upper insertion hole to lock the position of the locking pin, preventing the stepping module from rotating and maintaining the pedal state, improving the safety of the ladder. The lower insertion hole is opened at the lower position of the ladder frame corresponding to the arc-shaped chute. When the locking pin moves to the lower end of the arc-shaped chute, the stepping module constitutes the pedal, and the locking pin is inserted into the lower insertion hole to lock the position of the locking pin, preventing the stepping module from rotating and maintaining the tread bar state, improving the safety of the ladder.

[0014] Further, the stepping module includes a stepping profile and end caps. The stepping profile is provided with an installation channel and the sliding channel. The end caps are respectively fixed at both ends of the stepping profile, and the end caps are opened at the positions corresponding to the ports of the sliding channel and the installation channel.

[0015] Further, the stepping profile is a cuboid stepping profile. The upper end surface of the stepping profile is the first stepping surface, and the rear end surface of the stepping profile is the second stepping surface.

[0016] Further, it also includes a locking pin telescoping device. The locking pin telescoping device includes a bottom box, a spring, and a push button. A limiting notch communicating with the installation channel is opened on the front end surface of the stepping profile. The push button includes a pushing portion and a connecting portion. The connecting portion passes through the limiting notch and is inserted into the installation channel. The pushing portion is arranged outside the stepping profile in a sliding manner, and the pushing portion and the connecting portion are connected;

[0017] The bottom box is placed in the installation channel, the bottom box is provided with a limited slideway, the lock pin is placed in the limited slideway, one end of the lock pin passes through the outside of the bottom box and extends out of the installation channel, the other end of the lock pin passes through the outside of the bottom box and is connected to the connecting part, and the pushing part drives the lock pin to extend and retract through the connecting part;

[0018] The spring is placed in the limiting slideway, the spring is sleeved on the lock pin, one end of the spring abuts against the lock pin, and the other end of the spring abuts against the inner wall of the limiting slideway, and the spring constitutes a reset mechanism of the lock pin.

[0019] When the user pushes the pushing part to move, the spring is compressed, and the locking pin shrinks toward the installation channel and disengages from the upper plug hole / lower plug hole. At this time, the treadle module is in a loose state, and the user can push the treadle module to rotate and switch the treadle module to a pedal / treadle. At this time, the spring is reset, and the spring pushes the locking pin into the upper plug hole / lower plug hole, thereby locking the state of the treadle module, greatly improving the safety of the ladder.

[0020] Furthermore, there are two groups of locking pin retractable devices, and there are two locking pins. The first group of locking pin retractable devices is arranged on the left side of the installation channel, one end of the first locking pin extends out of the left port of the installation channel, and the other end of the first locking pin is connected to the first group of locking pin retractable devices, and the first group of locking pin retractable devices drives the first locking pin to retract along the installation channel; the second group of locking pin retractable devices is arranged on the right side of the installation channel, one end of the second locking pin extends out of the right port of the installation channel, and the other end of the second locking pin is connected to the second group of locking pin retractable devices, and the second group of locking pin retractable devices drives the second locking pin to retract along the installation channel.

[0021] Furthermore, it also includes a shielding cover, which is provided with a limiting column. The shielding cover is fixed to the front end surface of the treading profile. The shielding cover and the front end surface of the treading profile form a shielding cavity. The pushing part is placed in the shielding cavity in a sliding manner. The shielding cavity corresponds to the position of the limiting column to open a limiting slide groove. The limiting column extends into the limiting slide groove, and the limiting column limits the sliding distance of the pushing part.

[0022] The shielding cover shields part of the pushing part, making the ladder more beautiful, and the shielding cover is provided with a limiting column, which limits the moving distance of the pushing part to prevent the locking pin from being disengaged, thereby greatly improving the safety of the ladder.

[0023] Furthermore, the shielding hood is provided with a window, and the pushing part is provided with a warning status mark and a safety status mark. The pushing part slides along the shielding cavity, and the pushing part drives the locking pin to retract and leave the upper hole / lower hole, and the warning status mark moves to the window. The pushing part drives the locking pin to extend into the upper hole / lower hole, and the safety status mark moves to the window.

[0024] When the pedal module is loose, the pedal module is in a dangerous state, and the warning state mark moves to the window. The user can observe the state of the pedal module through the window, thereby reminding the user. When the pedal module is locked, the pedal module is in a safe state, and the safe state mark moves to the window. The user can observe the state of the pedal module through the window, thereby reminding the user.

[0025] Furthermore, the pushing portion is provided with a card slot, the safety status mark is a colored card, the card is fixed at the card slot, and the warning status mark is arranged on the outer wall of the pushing portion outside the card.

[0026] Furthermore, the side panels are respectively arranged at both ends of the support tube, and the side panels are provided with connecting ports corresponding to the support tubes. The ends of the support tubes are provided with flanges, and the ends of the support tubes extend out of the connecting ports. The flanges are against the outer periphery of the connecting ports to realize the connection between the side panels and the support tubes.

[0027] Further, the slideway is a "runway-shaped" slideway. When the support tube moves to the lower end of the "runway-shaped" slideway of the treading module, the first treading surface of the treading module serves as the treading surface of the treading module to form a pedal, and when the support tube moves to the upper end of the "runway-shaped" slideway of the treading module, the second treading surface of the treading module serves as the treading surface of the treading module to form a tread roller.

[0028] The beneficial effects of the present invention are as follows:

[0029] According to the present invention, the user pushes the pedal module to make the locking pin slide along the arc-shaped slide groove, causing the pedal module to rotate around the support tube and move the position of the pedal module. When the locking pin slides to the upper end of the arc-shaped slide groove, the first pedal surface of the pedal module faces upward to form the pedal surface of the pedal module to constitute a pedal. Since the pedal has a large pedal area, it is more comfortable for the user to stand on the pedal of the ladder in the pedal state. When the locking pin slides to the lower end of the arc-shaped slide groove, the second pedal surface of the pedal module faces upward to form the pedal surface of the pedal module to constitute a step stick. Since the step stick occupies a small space, it is convenient for the user to fold or store the ladder in the step stick state, thereby forming a ladder that is convenient for the user to stand and is also convenient to fold or store.

[0030] According to the present invention, when the user pushes the pushing part to move, the spring is compressed, and the locking pin shrinks toward the installation channel and disengages from the upper socket / lower socket. At this time, the pedal module is in a loose state, and the user can push the pedal module to rotate and switch the pedal module to a pedal / treadle. At this time, the spring is reset, and the spring pushes the locking pin into the upper socket / lower socket, thereby locking the state of the pedal module, greatly improving the safety of the ladder.

[0031] In the present invention, when the stepping module becomes loose, the stepping module is in a dangerous state. Coincidentally, the warning state identifier moves to the viewing window, and the user can observe the state of the stepping module through the viewing window, thus reminding the user. When the stepping module is locked, the stepping module is in a safe state. Coincidentally, the safety state identifier moves to the viewing window, and the user can observe the state of the stepping module through the viewing window, thus reminding the user. Description of the Drawings

[0032] Figure 1 It is a schematic diagram of the pedal and treadle conversion structure (pedal state).

[0033] Figure 2 It is a cross-sectional view of the pedal and treadle conversion structure (pedal state).

[0034] Figure 3 It is another cross-sectional view of the pedal and treadle conversion structure (when the pushing part is not pressed, the stepping module cannot rotate).

[0035] Figure 4 It is another cross-sectional view of the pedal and treadle conversion structure (when the pushing part is not pressed, the stepping module cannot rotate).

[0036] Figure 5 It is another cross-sectional view of the pedal and treadle conversion structure (when the pushing part is pressed, the stepping module can rotate).

[0037] Figure 6 It is another cross-sectional view of the pedal and treadle conversion structure (when the pushing part is pressed, the stepping module can rotate).

[0038] Figure 7 It is a schematic diagram of the separation of the shielding cover and the stepping module of the pedal and treadle conversion structure.

[0039] Figure 8 It is a schematic diagram of the separation of the locking pin telescopic device and the stepping module of the pedal and treadle conversion structure.

[0040] Figure 9 It is a schematic diagram of the pedal and treadle conversion structure (treadle state).

[0041] Figure 10 It is a cross-sectional view of the pedal and treadle conversion structure (treadle state).

[0042] Figure 11 It is an exploded view of the pedal and treadle conversion structure.

[0043] Figure 12 It is a schematic diagram of the shielding cover of the pedal and treadle conversion structure. Detailed Embodiments

[0044] The present invention will be further described below in conjunction with the drawings and embodiments:

[0045] Example, in combination with Figures 1 to 12 As shown, a pedal and tread rod conversion structure includes a ladder frame (not shown in the figure), a stepping module 1, side plates 2, support tubes 3, connecting rods 4, two locking pins 5, two sets of locking pin telescoping devices 6, and a shielding cover 7.

[0046] The stepping module 1 includes a stepping profile 8 and end caps 11. The stepping profile 8 is a rectangular stepping profile 8. The upper end surface of the stepping profile 8 is a first stepping surface 81, and the rear end surface of the stepping profile 8 is a second stepping surface 82. The area of the first stepping surface 81 is larger than the area of the second stepping surface 82. The stepping profile 8 is provided with an installation channel 83 and a sliding channel 84 with a diameter larger than that of the support tube 3. The sliding channel 84 is a "runway-shaped" sliding channel 84. The end caps 11 are respectively fixed at both ends of the stepping profile 8, and the end caps 11 are provided with openings 85 corresponding to the ports of the sliding channel 84 and the ports of the installation channel 83.

[0047] Each set of locking pin telescoping devices 6 includes a bottom box 61, a spring 62, and a push button 9. The front end surface of the stepping profile 8 is provided with a limiting notch 86 communicating with the installation channel 83. The push button 9 includes a pushing portion 91 and a connecting portion 92. The connecting portion 92 passes through the limiting notch 86 and is inserted into the installation channel 83. The pushing portion 91 is arranged outside the stepping profile 8 in a sliding manner, and the pushing portion 91 and the connecting portion 92 are connected.

[0048] The bottom box 61 of the first set of locking pin telescoping devices 6 is placed on the left side of the installation channel 83. The bottom box 61 is provided with a limiting slideway 611. The first locking pin 5 is placed in the limiting slideway 611. One end of the first locking pin 5 passes through the bottom box 61 and extends outside the left port of the installation channel 83. The other end of the first locking pin 5 passes through the outside of the bottom box 61 and is connected to the connecting portion 92 of the first set of locking pin telescoping devices 6. The pushing portion of the first set of locking pin telescoping devices 6 drives the first locking pin 5 to expand and contract through the connecting portion 92 of the first set of locking pin telescoping devices 6.

[0049] The spring 62 is placed in the limiting slideway 611. The spring 62 is sleeved on the first locking pin 5. One end of the spring 62 abuts against the first locking pin 5, and the other end of the spring 62 abuts against the inner wall of the limiting slideway 611. The spring 62 constitutes a reset mechanism for the first locking pin 5.

[0050] The bottom box 61 of the second group of lock pin retracting device 6 is placed on the right side of the installation channel 83, and the bottom box 61 is provided with a limiting slide 611. The second lock pin 5 is placed in the limiting slide 611. One end of the second lock pin 5 passes through the bottom box 61 and extends out of the right port of the installation channel 83. The other end of the second lock pin 5 passes through the outside of the bottom box 61 and is connected to the connecting part 92 of the first group of lock pin retracting device 6. The pushing part of the second group of lock pin retracting device 6 drives the second lock pin 5 to retract and retract through the connecting part 92 of the second group of lock pin retracting device 6.

[0051] The spring 62 is placed in the limiting slide 611 , and the spring 62 is sleeved on the second lock pin 5 . One end of the spring 62 abuts against the second lock pin 5 , and the other end of the spring 62 abuts against the inner wall of the limiting slide 611 . The spring 62 constitutes a reset mechanism for the second lock pin 5 .

[0052] The shielding cover 7 is provided with a limiting column 72, and the shielding cover 7 is fixed on the front end surface of the treading profile 8. The shielding cover 7 and the front end surface of the treading profile 8 form a shielding cavity 73. The pushing part 91 is placed in the shielding cavity 73 in a sliding manner. The pushing part 91 has a limiting slide groove 93 corresponding to the position of the limiting column 72. The limiting column 72 extends into the limiting slide groove 93, and the limiting column 72 limits the sliding distance of the pushing part 91.

[0053] The shielding cover 7 is provided with a window 71, the pushing part 91 is provided with a warning status mark 911 and a safety status mark 912, the pushing part 91 is provided with a card slot 913, the safety status mark 912 is a colored card, the color is set to green, the card is fixed at the card slot 913, the warning status mark 911 is provided on the outer wall of the pushing part 91 outside the card, and the warning status mark 911 is coated with red.

[0054] The pushing portion 91 slides along the shielding cavity 73, and the pushing portion 91 drives the locking pin 5 to retract and leave the upper socket / lower socket, and the warning status mark 911 moves to the window 71. The pushing portion 91 drives the locking pin 5 to extend into the upper socket / lower socket, and the safety status mark 912 moves to the window 71.

[0055] The side panels 2 are respectively arranged at both ends of the support tube 3, and the side panels 2 are provided with arc-shaped sliding grooves 21. The side panels 2 are provided with connecting ports 22 corresponding to the support tube 3. The support tube 3 extends into the sliding channel 84, and the ends of the support tube 3 are provided with flanges 31. The ends of the support tube 3 pass through the sliding channel 84 and extend out of the connecting port 22. The flanges 31 abut against the outer periphery of the connecting port 22 to realize the connection between the side panels 2 and the support tube 3.

[0056] The locking pin 5 extends into the arc-shaped slide groove 21 and slides along the arc-shaped slide groove 21 . The locking pin 5 drives the pedal module 1 to rotate around the support tube 3 and moves the position of the pedal module 1 .

[0057] The stepping module 1 and the side plate 2 are placed inside the ladder frame. The connecting rod 4 passes through the support tube 3, and both ends of the connecting rod 4 are respectively connected to the ladder frame, realizing the installation of the stepping module 1 and the side plate 2 on the ladder frame. The upper insertion hole (not shown in the figure) is opened at the upper end position of the ladder frame corresponding to the arc-shaped chute 21, and the lower insertion hole (not shown in the figure) is opened at the lower end position of the ladder frame corresponding to the arc-shaped chute 21.

[0058] Working principle:

[0059] The user simultaneously pushes the pushing parts of the first group of pin telescopic devices 6 and the second group of pin telescopic devices 6 to move, the spring 62 is compressed, and at the same time, the first pin 5 and the second pin 5 retract into the installation channel 83 and disengage from the upper insertion hole / lower insertion hole.

[0060] The user rotates the stepping module 1, and the first pin 5 and the second pin 5 respectively slide along the arc-shaped chute 21. When the first pin 5 and the second pin 5 respectively slide to the upper end of the arc-shaped chute 21, the first pin 5 and the second pin 5 respectively align with the upper socket of the ladder frame, the spring 62 resets, and the spring 62 respectively pushes the first pin 5 and the second pin 5 into the corresponding upper insertion holes. At this time, the first stepping surface 81 of the stepping profile 8 is exactly facing upwards, and the stepping module 1 is converted into a pedal.

[0061] Since the stepping module 1 is converted into a pedal, the stepping surface is widened, enabling the user to apply force more easily with their feet, allowing for a more comfortable working state and safer use. For example, when the ladder is unfolded into a ladder in the shape of a V, it is safer and more comfortable for the user to step on the pedal to work.

[0062] The user rotates the stepping module 1, and the first pin 5 and the second pin 5 respectively slide along the arc-shaped chute 21. When the first pin 5 and the second pin 5 respectively slide to the lower end of the arc-shaped chute 21, the first pin 5 and the second pin 5 respectively align with the lower socket of the ladder frame, the spring 62 resets, and the spring 62 respectively pushes the first pin 5 and the second pin 5 into the corresponding lower insertion holes. At this time, the second stepping surface 82 of the stepping profile 8 is exactly facing upwards, and the stepping module 1 is converted into a tread roller.

[0063] Since the stepping module 1 is converted into a tread roller, the tread roller occupies a small space in the ladder, saves space, reduces the packaging size, and lowers the transportation cost. It is easy to achieve a multi-functional design for the ladder. For example, the ladder has a small volume after being folded, which is convenient for storage. For example, when the ladder is unfolded into a straight ladder and the straight ladder leans against a wall, the tread roller occupies a small volume of the ladder and does not hinder the ladder from leaning against the wall, facilitating the user's climbing.

[0064] Furthermore, when the user pushes the pushing part of the first group of lock pin retracting devices 6 and the pushing part of the second group of lock pin retracting devices 6 at the same time, the first lock pin 5 and the second lock pin 5 shrink toward the installation channel 83 and disengage from the upper socket / lower socket. At this time, the pedal module 1 is loose and is in a dangerous state. The warning status mark 911 happens to move to the window 71, and the user can observe the state of the pedal module 1 through the window 71, thereby reminding the user.

[0065] When the pushing part of the first group of lock pin retracting devices 6 and the pushing part of the second group of lock pin retracting devices 6 are reset, the spring 62 pushes the first lock pin 5 and the second lock pin 5 into the corresponding upper socket / lower socket respectively. At this time, the pedal module 1 is locked and the pedal module 1 is in a safe state. The safety state mark 912 happens to move to the window 71. The user can observe the state of the pedal module 1 through the window 71, thereby reminding the user.

Claims

1. A pedal and treadle conversion structure, comprising a stepping module, side plates, a support tube and a locking pin, characterized in that: The stepping module is provided with a sliding channel having a diameter larger than that of the support tube. The stepping module is provided with a first stepping surface and a second stepping surface, and the area of the first stepping surface is larger than that of the second stepping surface. The side plate is provided with an arc-shaped sliding groove. One end of the support tube is connected to the side plate, and the other end of the support tube extends into the sliding channel. A locking pin is provided at the position of the stepping module corresponding to the arc-shaped sliding groove. The locking pin extends into the arc-shaped sliding groove and slides along the arc-shaped sliding groove. The locking pin drives the stepping module to rotate around the support tube and move the position of the stepping module, so that the first stepping surface or the second stepping surface of the stepping module serves as the stepping surface of the stepping module.

2. The pedal and treadle conversion structure according to claim 1, wherein: It further includes a ladder frame and a connecting rod. The connecting rod passes through the support tube, and both ends of the connecting rod are respectively connected to the ladder frame, so as to install the stepping module and the side plate on the ladder frame. The upper insertion hole is opened at the upper end position of the ladder frame corresponding to the arc-shaped sliding groove, and the lower insertion hole is opened at the lower end position of the ladder frame corresponding to the arc-shaped sliding groove.

3. The pedal and treadle conversion structure according to claim 1, characterized in that: The stepping module includes a stepping profile and end caps. The stepping profile is provided with an installation channel and the sliding channel. The end caps are respectively fixed at both ends of the stepping profile, and the end caps are opened at the ports of the sliding channel and the installation channel.

4. The pedal and treadle conversion structure according to claim 3, wherein: The stepping profile is a cuboid stepping profile. The upper end surface of the stepping profile is the first stepping surface, and the rear end surface of the stepping profile is the second stepping surface.

5. The pedal and treadle conversion structure according to claim 3, wherein: It further includes a locking pin telescoping device. The locking pin telescoping device includes a bottom box, a spring and a push button. A limiting notch communicating with the installation channel is opened on the front end surface of the stepping profile. The push button includes a pushing portion and a connecting portion. The connecting portion passes through the limiting notch and is inserted into the installation channel. The pushing portion is arranged outside the stepping profile in a sliding manner, and the pushing portion and the connecting portion are connected. The bottom box is placed in the installation channel. The bottom box is provided with a limiting sliding track. The locking pin is placed in the limiting sliding track. One end of the locking pin passes through the outside of the bottom box and extends out of the installation channel, and the other end of the locking pin passes through the outside of the bottom box and is connected to the connecting portion. The pushing portion drives the locking pin to telescope through the connecting portion. The spring is placed in the limiting sliding track. The spring is sleeved on the locking pin. One end of the spring abuts against the locking pin, and the other end of the spring abuts against the inner wall of the limiting sliding track. The spring constitutes a reset mechanism for the locking pin.

6. The pedal and treadle conversion structure according to claim 5, wherein: There are two groups of the locking pin telescoping devices. There are two locking pins. The first group of locking pin telescoping devices is arranged on the left side of the installation channel. One end of the first locking pin extends out of the left port of the installation channel, and the other end of the first locking pin is connected to the first group of locking pin telescoping devices. The first group of locking pin telescoping devices drives the first locking pin to telescope along the installation channel. The second group of locking pin telescoping devices is arranged on the right side of the installation channel. One end of the second locking pin extends out of the right port of the installation channel, and the other end of the second locking pin is connected to the second group of locking pin telescoping devices. The second group of locking pin telescoping devices drives the second locking pin to telescope along the installation channel.

7. The pedal and treadle conversion structure according to claim 5 or 6, characterized in that: It further includes a shielding cover. The shielding cover is provided with a limiting post. The shielding cover is fixed on the front end surface of the stepping profile. The shielding cover and the front end surface of the stepping profile enclose a shielding cavity. The pushing portion is arranged in the shielding cavity in a sliding manner. A limiting sliding groove is opened in the shielding cavity corresponding to the position of the limiting post. The limiting post extends into the limiting sliding groove, and the limiting post limits the sliding distance of the pushing portion.

8. The pedal and pedal rod conversion structure according to claim 7, characterized in that: The shielding cover is provided with a viewing window. The pushing part is provided with a warning state identifier and a safety state identifier. The pushing part slides along the shielding cavity. When the pushing part drives the locking pin to retract and leave the upper jack / lower jack, the warning state identifier just moves to the viewing window. When the pushing part drives the locking pin to extend into the upper jack / lower jack, the safety state identifier just moves to the viewing window.

9. The pedal and treadle conversion structure according to claim 8, characterized in that: The pushing part is provided with a card slot. The safety state identifier is a colored card, and the card is fixed at the card slot. The warning state identifier is arranged on the outer wall of the pushing part other than the card.

10. The pedal and treadle conversion structure according to claim 1, characterized in that: The side plates are respectively arranged at both ends of the support tube. The side plates are correspondingly provided with connection ports for the support tube. The end of the support tube is provided with a flanging, and the end of the support tube extends out of the connection port, and the flanging abuts against the periphery of the connection port to realize the connection between the side plate and the support tube.

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