Pedal structure and seat

Abstract

The utility model relates to the technical field of components, parts or accessories of A47C7 / 00 chairs or stools, and discloses a pedal structure and a seat, the pedal structure comprises a chair leg frame and a pedal, support parts are symmetrically arranged on the chair leg frame, and more than one mounting groove is arranged on each support part in parallel; the two ends of the supporting rod are respectively provided with a sliding block; the sliding block is provided with a first retaining protrusion and a second retaining protrusion, and the first retaining protrusion and the second retaining protrusion are located on different planes of the sliding block. When the sliding block slidably extends into the mounting groove and slides in place, the first retaining protrusion is changed into an extending state from a retracting state and abuts against the interior of the first retaining groove in the first side surface of the mounting groove. The second retaining bulge is inserted into a second retaining groove in the second side surface of the mounting groove; the supporting rod is connected with the pedal in a folding mode. The first retaining protrusion abuts against the first retaining groove, the second retaining protrusion is inserted into the second retaining groove, and clamping and fixing of the supporting rod and the supporting part are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of parts, components or accessories of chairs or stools of A47C7 / 00, and particularly relates to a footrest structure and a seat. Background Art

[0002] Footrests can be classified into medical footrests, car footrests, piano footrests, etc. according to their functions. Of course, footrests can also be used for daily office work and rest. As a supporting device for the soles of the feet, they come in a wide variety of types and functions.

[0003] For example, a children's pedal piano stool with the application number "CN201120083796.3" consists of: a seat stool, a slide track, a footrest plate, a bracket, an adjusting ring, a folding ring, stool legs, and adjusting bolts. Four stool legs are installed at the lower part of the seat stool. Slide tracks are installed on the stool legs, and a footrest plate is installed on the slide tracks. The footrest plate can be pulled out. Adjusting bolts are installed on the stool legs. A bracket is installed on one side of the bottom of the footrest plate, and an adjusting ring is installed on the bracket. A folding ring is installed between the footrest plate and the bracket.

[0004] However, in terms of its essence, as a foot support device, during the adjustment process of the bilateral adjusting bolts, it is possible that the heights are inconsistent, resulting in uneven stress on the slide track when the footrest plate is subjected to the pressure of the feet, and it is easy to be damaged. For the tightening and loosening adjustment of the adjusting bolts, manual screwing is required, and there is an inconsistent situation in the screwing degree on both sides. The footrest plate is assisted by the bracket for fixation, but the bracket supports the surface where the footrest plate is located at a point, which affects the stability effect. In view of this, the utility model provides a footrest structure. Content of the Utility Model

[0005] Aiming at the deficiencies of the prior art, the utility model provides a footrest structure to solve the above technical problems.

[0006] To achieve the above object, the utility model is realized through the following technical solutions: A footrest structure includes a chair leg frame and a pedal. Support parts are symmetrically arranged on the chair leg frame, and more than one installation groove is arranged in parallel on the support parts;

[0007] It further includes: a support rod with sliding blocks installed at both ends;

[0008] The sliding block has a first anti-retreat protrusion and a second anti-retreat protrusion, and the first anti-retreat protrusion and the second anti-retreat protrusion are located on different planes of the sliding block;

[0009] When the sliding block slides into the installation groove and slides in place:

[0010] The first anti-retreat protrusion changes from a retracted state to an extended state and abuts against the first anti-retreat groove on the first side surface of the installation groove;

[0011] The second anti-retreat protrusion is inserted into the second anti-retreat groove on the second side surface of the installation groove;

[0012] The support rod is foldably connected to the pedal.

[0013] Preferably, a return spring is provided in the sliding block, and the extending end of the return spring is fixedly connected to the first anti-retreat protrusion.

[0014] When the sliding block slides into the installation groove:

[0015] The first anti-retreat protrusion is pressed against the first side surface of the installation groove, and the return spring is in a compressed state;

[0016] When the sliding block slides into place:

[0017] The return spring returns to its extended state, and the first anti-retreat protrusion enters the first anti-retreat groove and abuts against the inner wall of the first anti-retreat groove.

[0018] Preferably, the first anti-retreat protrusion is a convex structure made of an elastic material. When the sliding block slides into the installation groove:

[0019] The first anti-retreat protrusion is pressed against the first side surface of the installation groove, and the first anti-retreat protrusion undergoes concave elastic deformation under pressure;

[0020] When the sliding block slides into place:

[0021] The first anti-retreat protrusion rebounds and restores, and the first anti-retreat protrusion enters the first anti-retreat groove and abuts against the inner wall of the first anti-retreat groove.

[0022] Preferably, the opening direction of the second anti-retreat groove is the same as the direction of the gravity received by the sliding block.

[0023] Preferably, the central axis of the cross-section of the same group of installation grooves forms any three combinations of an angle of +10 degrees to +30 degrees, 0 degrees, -10 degrees to -30 degrees with the horizontal line.

[0024] Preferably, the central axis of the cross-section of the same group of installation grooves forms an angle of +10 degrees to +30 degrees with the horizontal line.

[0025] Preferably, the central axis of the cross-section of the same group of installation grooves is parallel to the horizontal line.

[0026] Preferably, the central axis of the cross-section of the same group of installation grooves forms an angle of -10 degrees to -30 degrees.

[0027] Preferably, a connecting shaft is provided on the support rod, and an arc-shaped clamping sleeve is provided on the pedal. The arc-shaped clamping sleeve completely wraps or semi-wraps the connecting shaft and flips around the connecting shaft.

[0028] To solve the above technical problems, a seat provided by the present invention includes the above-mentioned footrest structure.

[0029] Beneficial effects

[0030] The present utility model provides a footrest structure, which has the following beneficial effects:

[0031] First, by inserting the sliding block into the installation groove, and when the sliding block slides into the installation groove and slides in place: the first anti-retreat protrusion changes from a retracted state to an extended state and abuts against the first anti-retreat groove on the first side surface of the installation groove; the second anti-retreat protrusion is inserted into the second anti-retreat groove on the second side surface of the installation groove, forming an abutment with different contact surfaces, so as to realize the sliding in place and relative fixation of the sliding block.

[0032] Second, the extension end of the return spring is fixedly connected to the first anti-retreat protrusion. When the sliding block slides into the installation groove: the first anti-retreat protrusion and the first side surface of the installation groove are mutually extruded, and the return spring is in a compressed state; when the sliding block slides in place: the return spring resumes its extended state, and the first anti-retreat protrusion enters the first anti-retreat groove and abuts against the inner wall of the first anti-retreat groove.

[0033] Third, a convex structure is made of an elastic material. When the sliding block slides into the installation groove: the first anti-retreat protrusion and the first side surface of the installation groove are mutually extruded, and the first anti-retreat protrusion undergoes a concave elastic deformation under pressure; when the sliding block slides in place: the first anti-retreat protrusion rebounds and resumes, and the first anti-retreat protrusion enters the first anti-retreat groove and abuts against the inner wall of the first anti-retreat groove.

[0034] Fourth, the opening direction of the second anti-retreat groove is the same as the direction of the gravity force received by the sliding block. By using the downward gravity of the sliding block, the second anti-retreat protrusion of the sliding block falls into the second anti-retreat groove. Since the natural gravity of the sliding block applies force in the extending direction of the second anti-retreat groove, in the absence of external force, the second anti-retreat protrusion and the second anti-retreat groove maintain a mutual balance of gravity and supporting force.

[0035] Fifth, the included angle between the central axis of the cross-section of the same group of installation grooves and the horizontal line is any three combinations of positive 10 degrees to positive 30 degrees, 0 degrees, negative 10 degrees to negative 30 degrees. By setting different opening angles in the same group of installation grooves, it can meet the various requirements of different types of applicable populations. For example:

[0036] To achieve a state where the surface where the sole is located is tilted upward with respect to the horizontal plane, it is possible to select an included angle between the central axis of the cross-section of the same group of installation grooves and the horizontal line of negative 10 degrees to negative 30 degrees. After the sliding block slides into the installation groove and is installed in place, the pedal tilts upward relative to the horizontal plane towards the seat direction.

[0037] To achieve a downward swing state between the surface where the sole of the foot is and the horizontal plane, the included angle between the central axis of the cross section of the same set of mounting grooves and the horizontal line can be selected to be positive 10 degrees to positive 30 degrees. After the sliding block is inserted into the mounting groove and installed in place, the pedal is turned downward relative to the horizontal plane toward the seat.

[0038] The surface where the sole of the foot is parallel to the horizontal plane is realized, and the surface where the sole of the foot is parallel to the horizontal plane is realized. After the sliding block is inserted into the installation groove and installed in place, the pedal is parallel to the direction of the seat relative to the horizontal plane;

[0039] The same group of seats can be set at different angles to meet the requirements of public seating for use by different groups of people.

[0040] Sixth, the angle between the central axis of the cross section of the same set of mounting grooves and the horizontal line is positive 10 degrees to positive 30 degrees, so that the surface where the sole of the foot is located is in a downward state with respect to the horizontal plane. The angle between the central axis of the cross section of the same set of mounting grooves and the horizontal line can be selected to be positive 10 degrees to positive 30 degrees. After the sliding block is inserted into the mounting groove and installed in place, the pedal is turned down relative to the horizontal plane toward the seat direction;

[0041] Seventh, the central axis of the cross section of the same group of mounting grooves is parallel to the horizontal line, so that the surface where the sole of the foot is located is parallel to the horizontal plane. After the sliding block is inserted into the mounting groove and installed in place, the pedal is horizontal relative to the horizontal plane towards the seat direction.

[0042] Eighth, the central axis of the cross section of the same set of mounting grooves has an angle of negative 10 degrees to negative 30 degrees with the horizontal line. After the sliding block is inserted into the mounting groove and installed in place, the pedal tilts toward the seat relative to the horizontal plane.

[0043] Ninth, use the arc-shaped sleeve to fully or half-wrap the connecting shaft and flip it around the connecting shaft to adjust the rotation angle of the pedal for easy storage.

[0044] Tenth, a seat provided by the present invention has any one of the advantages of the above-mentioned footrest structure because it includes the above-mentioned footrest structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Figure 1 This is a first structural schematic diagram of the first embodiment of the utility model;

[0046] Figure 2 This is a second structural schematic diagram of the first embodiment of the utility model;

[0047] Figure 3 for Figure 2 Schematic diagram of part A;

[0048] Figure 4 for Figure 2 Schematic diagram of part B;

[0049] Figure 5 Exploded view of the sliding block of Embodiment 1 of the present utility model with a first limiting protrusion assembled thereto;

[0050] Figure 6 Schematic structural view of the support part of Embodiment 2 of the present utility model;

[0051] Figure 7 Schematic structural view of the sliding block of Embodiment 2 of the present utility model;

[0052] Figure 8 Schematic structural view of the support part of Embodiment 3 of the present utility model;

[0053] Figure 9 Schematic structural view of the sliding block of Embodiment 3 of the present utility model.

[0054] Wherein, 101, support part; 102, installation groove; 1021, first anti-retreat groove; 1022, second anti-retreat groove; 201, sliding block; 2011, first anti-retreat protrusion; 2012, second anti-retreat protrusion; 2013, connecting part; 202, support rod; 3, chair leg frame; 301, chair leg; 4, pedal; 401, arc-shaped clamping sleeve; 5, return spring; 6, connecting shaft; 7, screw; 8, fixing sleeve. Detailed implementation manners

[0055] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.

[0056] Through those skilled in the art, the components in this case are connected in sequence. For the specific connection and operation sequence, reference should be made to the following working principle. The detailed connection means are well-known technologies in the art. The following mainly introduces the working principle and process.

[0057] From Figure 1As shown in the figure, a pedal structure in this case includes a chair leg frame 3 and a pedal 4. It should be further pointed out that the chair leg frame 3 includes a pair of front support legs 301 and a pair of rear support legs 302. The pair of front support legs 301 are connected by a first cross bar to maintain the relative stability of the pair of front support legs 301; the pair of rear support legs 302 are connected by a second cross bar to maintain the relative stability of the pair of rear support legs 302; the pair of rear support legs 302 are of a folded structure, and the horizontal part of the folded rear support leg is fixedly connected to the front support leg 301 in one of the ways of welding, plugging or bolt fixing. The extended part of the folded rear support leg extends away from the front support leg 301, so that the points of the pair of front support legs 301 and the pair of rear support legs 302 supporting the ground are connected into a rectangle or a trapezoid, maintaining the stability of the chair leg frame 3 and providing a stable base for the pedal to bear the weight of the user.

[0058] Furthermore, the design of the pedal 4 can be folded and stored on the projection plane of the above-mentioned rectangle or trapezoid, which is convenient for placing the calves when the user does not need to use the pedal. When the user uses the pedal, the pedal 4 is folded, and the edge protrudes outside the projection plane of the rectangle or trapezoid to provide space for placing the feet. It should be noted that the combination of the connecting shaft 6 on the support rod 202 and the arc-shaped sleeve 401 on the pedal 4 enables the arc-shaped sleeve 401 to fully or semi-wrap the connecting shaft 6 and realizes the flexible operation of the pedal 4 by flipping around the connecting shaft 6.

[0059] Furthermore, as Figure 1 shown, a number of through holes are provided in the support part 101, and a number of threaded holes are provided on the front support leg 301 of the chair leg frame 3. The screw 7 passes through the through holes of the support part 101 and finally reaches the threaded holes on the chair leg frame 3 for fixation. It should be noted that the screw connection method is only a preferred solution in this embodiment, and it can also be plugging fixation or integral molding of the two, both of which realize the relative fixation of the support part 101 and the front support leg 301.

[0060] Furthermore, as Figure 3 shown, more than one mounting groove 102 is provided in parallel on the support part 101. In this embodiment, the number of mounting grooves 102 can be even or odd, and the length of the specific design of the support part 101 and the special requirements of the user group are used as the influencing factors for the number.

[0061] Furthermore, one end of the sliding block 201 extends to form a connecting portion 2013, and the connecting portion 2013 of the sliding block 201 is inserted into the two ends of the support rod 202. Since the anti-slip grooves are formed on the surface of the connecting portion 2013, the relative friction between the end of the support rod 202 and the connecting portion 2013 is increased to prevent the two from slipping; the sliding block 201 has a first stop protrusion 2011 and a second stop protrusion 2012. In the present embodiment, the first stop protrusion 2011 is specifically a spherical result with a 360-degree protrusion design; the second stop protrusion 2012 needs to have an abutting plane or arc surface, so that when the sliding block 201 is subjected to gravity and moves on the horizontal plane, it is subjected to mutually conflicting forces, thereby achieving relative stillness with the mounting groove. Only when the sliding block 201 is lifted by an external force, the second stop protrusion 2012 is separated from the second stop groove, the mutually conflicting forces on the horizontal plane are eliminated, and the relative stillness condition of the mounting groove is released.

[0062] Further, such as Figure 4 As shown, the first stop protrusion 2011 and the second stop protrusion 2012 are located in different planes of the sliding block 201, and the angle formed by the extension of the planes where the first stop protrusion 2011 and the second stop protrusion 2012 are respectively located is less than 180. That is to say, while the second stop protrusion 2012 sinks into the second stop groove due to gravity, the first stop protrusion extends along the extension direction of the support rod 202 or retracts in the opposite direction.

[0063] Furthermore, when the sliding block 201 slides into the installation groove 102 and slides into place: the first stop protrusion 2011 changes from a retracted state to an extended state, abutting against the first stop groove 1021 on the first side surface of the installation groove 102; the second stop protrusion 2012 is inserted into the second stop groove 1022 on the second side surface of the installation groove 102.

[0064] The pedal structure recorded in this embodiment is a structure in which sliding blocks are installed at both ends of a support rod to ensure the consistency of height adjustment on both sides. The pedal is evenly stressed as a whole in the installed state, and the cross bar is used as a linear support, so the stability is better; the sliding block enters the installation groove and abuts against the first stop groove through the first stop protrusion 2011, and the second stop protrusion 2012 is inserted into the second stop groove, so as to realize the clamping fixation of the support rod and the support part, and the first stop protrusion rebounds and locks, which is easy to install and suitable for a wide range of people.

[0065] Further, such as Figure 5As shown, an installation area is formed inside the sliding block 202, and a fixing sleeve 8 is arranged in the installation area. The fixing sleeve 8 is a structure with both ends open, and in the installed state, one side corresponding to the first stop groove serves as the end of the extension or retraction channel of the first stop protrusion 2011, one end of the reset spring 5 is fixedly connected to the surface of the installation area, and the other end of the reset spring 5 is fixedly connected to the surface of the first stop protrusion 2011, and the fixing sleeve 8 is sleeved on the reset spring 5 to limit the compression or extension direction of the reset spring 5.

[0066] When the sliding block 201 is pushed and extends into the installation groove 102, the first stop protrusion 2011 will closely contact and squeeze the first side surface of the installation groove 102. In this process, the return spring 5 will enter a compressed state due to the pressure. This change in state not only provides the necessary resistance for the sliding block, but also provides a basis for its subsequent positioning and fixing. Once the sliding block 201 slides into place, the return spring 5 will return to its extended state. At this time, the first stop protrusion 2011 will smoothly enter the first stop groove 1021 and form a close contact with the inner wall of the groove, thereby ensuring the stable positioning of the sliding block.

[0067] Further, such as Figures 1 to 3 As shown, the same group of mounting grooves 102 is designed so that the angle between the central axis of its cross section and the horizontal line is positive 10 degrees to positive 30 degrees. Under this design, when the user holds the support rod 202 with sliding blocks 201 at both ends and slides into a pair of symmetrically arranged mounting grooves 102, the first stop protrusion 2011 retracts due to the pressure of the first side surface of the mounting groove 102. At this time, the reset spring 5 is in a compressed state. When the first stop protrusion 2011 continues to penetrate until it reaches the first stop groove 1021, the reset spring 5 rebounds, pushing the first stop protrusion 2011 and the first stop groove 102 out of contact. 1 are squeezed against each other to form a first locking; then the user lets go of the support rod, the support rod loses its supporting force, and due to the gravity of the support rod, the second stop protrusions on the sliding blocks at both ends fall into the second stop grooves, forming the second stop protrusions and the second stop groove surfaces being squeezed against each other to achieve a second locking. At this time, if these two conditions are not met: first, the user's external force lifts (the second stop protrusion is separated from the second stop groove surface) and second, the user pulls the sliding block out of the support groove (the first stop protrusion is separated from the first stop groove surface), then the footrest structure remains relatively stable and stationary with the chair leg frame 3.

[0068] Embodiment 2, as Figure 6 and Figure 7 As shown, the same set of mounting grooves 102 is designed so that the angle between the central axis of its cross section and the horizontal line is 0 degrees, so that the surface where the sole of the foot is parallel to the horizontal plane, and the surface where the sole of the foot is parallel to the horizontal plane. After the sliding block is inserted into the mounting groove and installed in place, the pedal is horizontal relative to the horizontal plane in the direction of the seat.

[0069] Embodiment three, as Figure 8 and Figure 9 As shown, the same set of mounting grooves 102 is designed so that the included angle between the central axis of its cross section and the horizontal line is negative 10 degrees to negative 30 degrees, so that the surface where the sole of the foot is located is in an upward state relative to the horizontal plane. The included angle between the central axis of the cross section of the same set of mounting grooves and the horizontal line can be selected to be negative 10 degrees to negative 30 degrees. After the sliding block is extended into the mounting groove and installed in place, the pedal is tilted toward the seat relative to the horizontal plane.

[0070] Finally, the combination of the connecting shaft 6 on the support rod 202 and the arc-shaped clamping sleeve 401 on the pedal 4 shows the ingenuity and practicality of the design. The arc-shaped clamping sleeve 401 can fully or half-wrap the connecting shaft 6, and realize the flexible operation of the pedal 4 by turning around the connecting shaft 6. This design not only enhances the operating performance of the pedal, but also provides additional protection for the stability and durability of the entire mechanical system.

[0071] Embodiment 4:

[0072] The first stop protrusion 2011 is made of elastic material to reduce the setting of the return spring. The selection of this material enables the protrusion to undergo appropriate elastic deformation when subjected to pressure, thereby providing buffering and adaptability during the sliding process of the sliding block 201. When the sliding block 201 slides into place, the elastic characteristics of the first stop protrusion 2011 enable it to rebound quickly, further enhancing the stability and reliability of the structure.

[0073] Embodiment five:

[0074] A seat is provided, including the above-mentioned footrest structure, by extending the sliding block into the installation groove, and when the sliding block slides into the installation groove and slides into place: the first stop protrusion changes from a retracted state to an extended state, abutting against the first stop groove on the first side surface of the installation groove; the second stop protrusion is inserted into the second stop groove on the second side surface of the installation groove, forming an abutment of different contact surfaces, so that the sliding block can slide into place and be relatively fixed; the extended end of the return spring is fixedly connected to the first stop protrusion, and when the sliding block slides into the installation groove: the first stop protrusion and the installation groove are in contact with each other. The first side surfaces are squeezed against each other, and the reset spring is in a compressed state; when the sliding block slides into place: the reset spring returns to an extended state, the first stop protrusion enters the first stop groove and abuts against the inner wall of the first stop groove; third, a protrusion-shaped structure is made of elastic material, and when the sliding block slides into the installation groove: the first stop protrusion and the first side surface of the installation groove are squeezed against each other, and the first stop protrusion undergoes a concave elastic deformation under pressure; when the sliding block slides into place: the first stop protrusion rebounds and recovers, the first stop protrusion enters the first stop groove and abuts against the inner wall of the first stop groove.

[0075] It is understandable that the pedal, as the part of the footrest structure for placing the sole of the foot, can be made of a suitable material according to actual needs. For example, for general needs, it can be made of PVC material, etc. For warmth or softness needs, a heat preservation pad can be added to its surface. Of course, active heating can also be achieved by installing a heating device such as a heating wire. For heat dissipation needs, mesh holes or other ventilation and sweat-absorbing materials can be added. This application document only records one implementable technical solution, not all embodiments, and can be specifically designed according to actual needs.

[0076] In an implementable manner, floor feet 25 are provided on both the front support leg and the rear support leg.

[0077] In the specific implementation process, it is particularly worth noting that the floor feet can be made of plastic material or any other material that meets actual needs. For example, if made of rubber material, it can reduce wear on the ground, and at the same time, when the user steps on this footrest structure, it has a certain softness and shock absorption effect. More importantly, when pushing this footrest structure to move on the ground, it can reduce noise.

[0078] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "including a..." does not exclude the existence of additional identical elements in the process, method, article or device including the said element.

[0079] In the present utility model, unless otherwise clearly specified and defined, terms such as "installation", "setting", "connection", "fixation", "swivel connection", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements. Unless otherwise clearly defined, for those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0080] Although embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. A footrest structure, comprising a chair leg frame (3) and a pedal (4), characterized in that: The chair leg frame (3) is symmetrically provided with a support portion (101), and the support portion (101) is provided with more than one mounting groove (102) in parallel; Also includes: A support rod (202) with sliding blocks (201) mounted on both ends; The sliding block (201) has a first stop-retraction protrusion (2011) and a second stop-retraction protrusion (2012), wherein the first stop-retraction protrusion (2011) and the second stop-retraction protrusion (2012) are located on different planes of the sliding block (201); When the sliding block (201) slides into the installation groove (102) and slides into place: The first stop protrusion (2011) changes from a retracted state to an extended state, and abuts against a first stop groove (1021) on a first side surface of the installation groove (102); The second stop protrusion (2012) is inserted into a second stop groove (1022) on the second side surface of the installation groove (102); The support rod (202) is foldably connected to the pedal (4).

2. A pedal structure according to claim 1, characterized in that: The sliding block (201) is provided with a return spring (5), and the extended end of the return spring (5) is fixedly connected to the first stop protrusion (2011). When the sliding block (201) slides into the mounting groove (102): The first stop protrusion (2011) and the first side surface of the installation groove (102) are pressed against each other, and the return spring (5) is in a compressed state; When the sliding block (201) slides into place: The return spring (5) returns to the extended state, and the first stop protrusion (2011) enters the first stop groove (1021) and abuts against the inner wall of the first stop groove (1021).

3. A pedal structure according to claim 1, characterized in that: The first stop protrusion (2011) is a protrusion-shaped structure made of elastic material. When the sliding block (201) slides into the installation groove (102), the first stop protrusion (2011) and the first side surface of the installation groove (102) are pressed against each other, and the first stop protrusion (2011) undergoes concave elastic deformation under pressure. When the sliding block (201) slides into place: The first stop-retraction protrusion (2011) rebounds and recovers, and the first stop-retraction protrusion (2011) enters the first stop-retraction groove (1021) and abuts against the inner wall of the first stop-retraction groove (1021).

4. A footrest structure according to claim 1, 2 or 3, characterized in that: The opening direction of the second stop groove (1022) is the same as the direction of gravity on which the sliding block (201) is subjected.

5. A pedal structure according to claim 4, characterized in that: The included angle between the central axis of the cross section of the same group of mounting grooves (102) and the horizontal line is any three combinations of positive 10 degrees to positive 30 degrees, 0 degrees, and negative 10 degrees to negative 30 degrees.

6. A footrest structure according to claim 4, characterized in that: The included angle between the central axis of the cross section of the same group of installation grooves (102) and the horizontal line is positive 10 degrees to positive 30 degrees.

7. A footrest structure according to claim 1 or 2, characterized in that: The central axis of the cross section of the same group of mounting grooves (102) is parallel to the horizontal line.

8. A footrest structure according to claim 1 or 2, characterized in that: The central axis of the cross section of the same group of mounting grooves (102) has an included angle of negative 10 degrees to negative 30 degrees.

9. A footrest structure according to claim 1 or 2, characterized in that: The support rod (202) is provided with a connecting shaft (6), and the pedal (4) is provided with an arc-shaped clamping sleeve (401), wherein the arc-shaped clamping sleeve (401) fully or half-wraps the connecting shaft (6) and turns around the connecting shaft (6).

10. A seat, characterized in that: It comprises the pedal structure described in any one of claims 1 to 9.

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