A bracket structure and a seat

Abstract

The present invention discloses a bracket structure and a seat, relating to the technical field of mechanical structures, including a seat frame assembly, a footrest assembly, and a motion link assembly. Among them, the bracket structure further includes a first reset elastic member, which is arranged on the seat frame assembly and connected to the motion drive assembly or the footrest assembly. The first reset elastic member applies a reset elastic force to the motion drive assembly, directly or indirectly driving the footrest assembly to rotate relative to the seat frame assembly to retract. The bracket structure and the seat provided by the present invention adopt the first reset elastic member to assist in retracting the pedal, reducing the force required for the footrest assembly to retract, and having a fast retraction speed, with the advantages of convenience, labor saving, and rapidity.

Description

Technical Field

[0001] The present invention relates to the technical field of mechanical structures, and in particular to a bracket structure, and more specifically, to a seat. Background Art

[0002] Ordinary furniture seats usually do not come with a footrest device. When a person sits on the seat to relax, due to the lack of support for the feet, people do not feel so relaxed and comfortable. If a separate external footrest is used, it occupies a large amount of space, is not conducive to storage, and the height of the footrest is not convenient to match the height of the seat.

[0003] Some seats with footrest devices are disclosed in the prior art. Such seats cooperate with a link mechanism and a rotating mechanism to extend or retract the footrest device from the bottom of the seat.

[0004] For example, German Patent Application No. DE102017100637A1 discloses a footrest structure and a seat furniture. In the solution disclosed in this patent application, during the process of driving the rear pedal assembly to rotate by means of a motion driving component, by means of a link motion component, the follow-up of the front pedal assembly is simultaneously realized, so that when the rear pedal assembly rotates outwards, the front pedal assembly extends forward, or when the rear pedal assembly rotates inwards, the front pedal assembly moves backward and is retracted.

[0005] This footrest structure also discloses that a handle or a motor can be used to drive the rotation of the motion driving component. However, in the solution using the handle as the driving part, since both the retraction and the extension need to be completed by a person operating the rotating shaft, especially during the retraction process, the handle needs to be rotated and the elastic force of the pre-tightening spring set to assist the extension of the front pedal link needs to be overcome, resulting in inconvenient and laborious retraction. Summary of the Invention

[0006] In order to overcome at least one of the above-mentioned defects of the prior art, the first object of the present invention is to provide a bracket structure.

[0007] The technical solution adopted by the present invention to solve its problems is as follows:

[0008] A bracket structure, comprising:

[0009] A seat frame assembly;

[0010] A footrest assembly rotatably connected to the seat frame assembly;

[0011] A motion driving component for driving the footrest assembly to rotate relative to the seat frame assembly;

[0012] A first reset elastic member is disposed on the seat frame assembly and connected to the motion drive assembly or the footrest assembly. The first reset elastic member provides a reset elastic force to indirectly or directly drive the footrest assembly to rotate relative to the seat frame assembly for retraction.

[0013] The bracket structure provided by the present invention includes a first reset elastic member, which indirectly or directly drives the footrest assembly to rotate relative to the seat frame assembly through the first reset elastic member, so that the footrest assembly retracts, solving the problems of inconvenient retraction and laborious retraction of the pedal in the prior art, and achieving the advantages of labor saving and high speed.

[0014] In a possible implementation manner, it further includes a fixed mounting seat and a support link. The seat frame assembly is pivotally connected to the fixed mounting seat so as to be swingable up and down. Two ends of the support link are respectively rotatably connected to the motion drive assembly and the fixed mounting seat. When the seat frame assembly is pressed and swings downward relative to the fixed mounting seat in a state where the footrest assembly is opened outward, the seat frame assembly drives the motion drive assembly to be self-locked through the support link.

[0015] In a possible implementation manner, it further includes an elastic reset mechanism disposed between the fixed mounting seat and the seat frame assembly. The elastic reset mechanism is used to drive the seat frame assembly to rotate relative to the fixed mounting seat to achieve reset.

[0016] In a possible implementation manner, the elastic reset mechanism includes a reset rotating shaft and a compression spring. Among them, the seat frame assembly is pivotally connected to the fixed mounting seat through the reset rotating shaft, and the reset rotating shaft is fixed to the seat frame assembly;

[0017] The reset rotating shaft is fixedly connected with a reset plate. A screw is fixed on the fixed mounting seat. The screw passes through the reset plate and is threadedly connected with a fixed nut. The compression spring is sleeved on the screw, and one end of the compression spring abuts against the fixed nut, and the other end of the compression spring applies an elastic force to the reset plate so that the reset plate abuts against the fixed mounting seat.

[0018] In a possible implementation manner, the motion drive assembly includes a rotating shaft, a rear drive link, a middle drive link, and a front drive link that are sequentially rotatably connected. The rotating shaft is rotatably connected to the seat frame assembly, and the front drive link is rotatably connected to the footrest assembly;

[0019] The first reset elastic member is connected to at least one of the rotating shaft, the rear drive link, the middle drive link, and the front drive link.

[0020] In a possible implementation, a first crank and a second crank are fixed on the rotating shaft. The first crank is hinged to the rear driving connecting rod, and the second crank is hinged to the supporting connecting rod.

[0021] When the footrest assembly is in the outward open state and the seat frame assembly is pressed and swings downward relative to the fixed mounting base, the seat frame assembly drives the rotating shaft to rotate, so that the hinge point of the first crank and the rear driving connecting rod remains at or bypasses the dead point, thereby realizing the self-locking of the motion driving assembly.

[0022] In a possible implementation, a limiting block for restricting the rotation angle of the first crank is fixed on the seat frame assembly, and the limiting block is located between the rotating shaft and the middle driving connecting rod.

[0023] In a possible implementation, a handle is further included, and the handle is in transmission connection with the motion driving assembly.

[0024] In a possible implementation, a linear telescopic assembly is further included, and the linear telescopic assembly is in transmission connection with the motion driving assembly.

[0025] Based on the same inventive concept, a second object of the present invention is to provide a seat including the above-mentioned bracket structure.

[0026] The seat provided by the present invention adopts a bracket structure that can be quickly retracted and labor-saving, thus having the advantages of being convenient to use and having good application and market prospects.

[0027] In summary, the bracket structure and the seat provided by the present invention have the following technical effects:

[0028] 1) The bracket structure of the present invention uses a first reset elastic member to assist in retracting the pedal, reducing the force required for retraction and having a fast retraction speed, with the advantages of being convenient, labor-saving, and fast.

[0029] 2) In the bracket structure of the present invention, when the seat frame assembly is pressed, it also has the function of self-locking the motion driving assembly. Specifically, by setting the seat frame assembly to be swingable up and down relative to the fixed mounting base, and rotatably connecting the fixed mounting base and the motion driving assembly through the supporting connecting rod. When the seat frame assembly is pressed and swings downward relative to the fixed mounting base, the supporting connecting rod provides a self-locking holding force for the motion driving assembly to realize the self-locking of the motion driving assembly to maintain the outward open state of the footrest assembly, with a clever structure.

[0030] 3) The bracket structure further includes a reset mechanism, and through the reset mechanism, the inclination angle of the seat frame assembly relative to the support base is reset.

[0031] 4) A four-bar linkage mechanism is formed by the second crank, the support connecting rod, the fixed mounting seat, and the seat frame assembly. When a person sits on the seat frame assembly or applies a downward pressure to the seat frame assembly, the support connecting rod applies a driving force to the rotating shaft through the second crank, thereby generating a torque to achieve the self-locking of the motion driving assembly. When the person gets up or the applied pressure is removed, the elastic force generated by the first reset elastic member can assist in retracting the pedal. The self-locking structure is ingenious and the retraction is fast and convenient.

[0032] 5) The seat of the present invention thus has the advantages of quick and convenient storage, and has good application and market prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 is a schematic structural view of the bracket structure of one embodiment of the present invention;

[0034] Figure 2 is a schematic view of another perspective of the bracket structure of one embodiment of the present invention;

[0035] Figure 3 is a top view of the bracket structure of one embodiment of the present invention;

[0036] Figure 4 is Figure 3 a cross-sectional view taken along the line A-A in

[0037] Figure 5 is a schematic diagram of the structural principle of the motion driving assembly in the bracket structure of one embodiment of the present invention;

[0038] Figure 6 is Figure 3 a cross-sectional view taken along the line B-B in

[0039] Figure 7 is a schematic diagram of the structural principle of the locking structure in the bracket structure of one embodiment of the present invention;

[0040] Figure 8 is a schematic structural view of the bracket structure of one embodiment of the present invention.

[0041] Among them, the meanings of the reference numerals are as follows:

[0042] 11. Seat frame assembly; 1101. Limit block; 12. Rear pedal assembly; 13. Front pedal assembly; 14. Motion drive assembly; 1401. Rotating shaft; 14011. Fixed rocker; 14012. Rotating connecting rod; 14013. First crank; 1402. Rear drive connecting rod; 1403. Middle drive connecting rod; 1404. Front drive connecting rod; 15. Motion connecting rod assembly; 16. First reset elastic member; 17. Fixed mounting seat; 1701. Mounting sleeve; 1702. Fixed plate; 18. Second crank; 19. Support connecting rod; 20. Reset rotating shaft; 21. Second reset elastic member; 22. Reset plate; 23. Screw; 2301. Fixed nut; 24. Handle; 25. Linear telescopic rod; 2501. Drive rocker handle. Detailed implementation manner

[0043] For better understanding and implementation, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0044] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0045] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present invention belongs. The terms used in the description of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0046] Embodiment 1

[0047] Refer to Figures 1 - 7 , the present invention discloses a bracket structure, including a seat frame assembly 11 and a foot pedal assembly; wherein, the foot pedal assembly includes a rear pedal assembly 12 and a front pedal assembly 13;

[0048] The rear pedal assembly 12 is rotatably connected to the seat frame assembly 11;

[0049] The front pedal assembly 13 is connected to the seat frame assembly 11 and can slide relative to the rear pedal assembly 12;

[0050] The motion drive assembly 14 is used to drive the rear pedal assembly 12 to rotate relative to the seat frame assembly 11;

[0051] The motion link assembly 15 is used to drive the front pedal assembly 13 to move relative to the rear pedal assembly 12 when the rear pedal assembly 12 is driven to rotate by the motion drive assembly 14.

[0052] The above-mentioned rear pedal assembly 12, front pedal assembly 13, motion drive assembly 14 and motion link assembly 15 are not the main inventive points to be protected in this application. The specific structures of the rear pedal assembly 12, front pedal assembly 13, motion drive assembly 14 and motion link assembly 15 can refer to the German patent application with the publication number DE102017100637A1.

[0053] Among them, the bracket structure further includes:

[0054] The first reset elastic member 16 is disposed on the seat frame assembly 11 and is connected to the motion drive assembly 14 or the rear pedal assembly 12. The first reset elastic member 16 applies a reset elastic force to the motion drive assembly 14, so that the motion drive assembly 14 drives the rear pedal assembly 12 to rotate relative to the seat frame assembly 11 to retract, or the first reset elastic member 16 directly drives the rear pedal assembly 12 to rotate relative to the seat frame assembly 11 to retract.

[0055] For the convenience of description, the process of the rear pedal assembly 12 rotating outwards relative to the seat frame assembly 11 to extend the pedal is defined as the forward rotation of the rear pedal assembly 12. Correspondingly, the reverse rotation of the rear pedal assembly 12 refers to the rear pedal assembly 12 rotating back relative to the seat frame assembly 11 to shorten the pedal and store it.

[0056] The first reset elastic member 16 applies a reset elastic force to the motion drive assembly 14, so that the motion drive assembly 14 applies a reverse driving force to the rear pedal assembly 12, or the first reset elastic member 16 directly applies a reset elastic force to the rear pedal assembly 12 to make it reverse, thereby assisting the pedal to retract, achieving the purpose of saving effort and improving the retraction efficiency. It is especially suitable for pedal devices with manually operated pedal telescoping. When applied to pedal devices with electrically actuated pedal telescoping, it can also play the role of reducing power consumption.

[0057] Refer to Figure 1 , in this embodiment, the motion drive assembly 14 includes a rotating shaft 1401, a rear drive link 1402, a middle drive link 1403 and a front drive link 1404 that are rotatably connected in sequence. The rotating shaft 1401 is rotatably connected to the seat frame assembly 11, and the front drive link 1404 is rotatably connected to the front pedal assembly 13.

[0058] For the sake of description, correspondingly, the process of driving the rear pedal assembly 12 to rotate forward by rotating the rotating shaft 1401 forward is defined as the forward rotation of the motion driving assembly 14. Correspondingly, the process of the rotating shaft 1401 rotating backward to cause the reverse rotation of the motion driving assembly 14 is the process of the motion driving assembly 14 driving the rear pedal assembly 12 to rotate back relative to the seat frame assembly 11 to shorten the pedal and store it.

[0059] Refer to Figure 1 、 Figure 3 The first reset elastic member 16 is connected to at least one of the rotating shaft 1401, the rear driving link 1402, the middle driving link 1403, and the front driving link 1404. The first reset elastic member 16 directly or indirectly applies a force to the rotating shaft 1401, so that the rotating shaft 1401 can rotate backward to sequentially drive the rear driving link 1402, the middle driving link 1403, and the front driving link 1404 to move backward and retract, thereby driving the rear pedal assembly 12 to rotate backward and achieving the purpose of assisting the pedal to retract.

[0060] Furthermore, for the sake of description, the seat frame assembly 11 is divided into a front end and a rear end. The front end of the seat frame assembly 11 is the end close to the connection with the rear pedal assembly 12, and the rear end of the seat frame assembly 11 is the end close to the connection with the rotating shaft 1401.

[0061] Furthermore, refer to Figure 1 、 Figure 3 In this embodiment, the first reset elastic member 16 is a tension spring. A fixed rocker 14011 is fixedly arranged on the rotating shaft 1401. A rotating pull rod 14012 is hinged on the fixed rocker 14011. One end of the first reset elastic member 16 is connected to the rotating pull rod 14012, and the other end is connected to the seat frame assembly 11. Specifically, in this embodiment, the first reset elastic member 16 is located on the side of the rotating shaft 1401 facing the rear end of the seat cushion base. The first reset elastic member 16 applies a counterclockwise reset elastic force to the rotating shaft 1401 through the rotating pull rod 14012, so that the rotating shaft 1401 has a tendency to rotate backward.

[0062] In another possible implementation manner, the first reset elastic member 16 can also be arranged on the side of the rotating shaft 1401 facing the rear end of the seat frame assembly 11. The first reset elastic member 16 is connected to the rear end of the seat frame assembly 11, and can also achieve the purpose of applying a reverse reset elastic force to the rotating shaft 1401.

[0063] Furthermore, more preferably, the rotating pull rod 14012 is arc-shaped.

[0064] The rotating pull rod 14012 is set to be arc-shaped. When the rotating pull rod 14012 is under the tensile force of the first reset elastic member 16, its arc-shaped surface can be in contact with the surface of the rotating shaft 1401, increasing the contact area between the rotating pull rod 14012 and the rotating shaft 1401, reducing the possibility of the rotating pull rod 14012 being broken under force. In addition, the arc-shaped rotating pull rod 14012 is more conducive to applying a rotational torque to the rotating shaft 1401, thereby assisting the pedal to reset.

[0065] Refer to Figure 2 、 Figure 4 In a possible implementation manner, a first crank 14013 is fixed on the rotating shaft 1401, and the first crank 14013 is hinged to the rear driving connecting rod 1402.

[0066] When the rotation center of the rotating shaft 1401, the hinge point of the first crank 14013 and the rear driving connecting rod 1402, and the hinge point of the rear driving connecting rod 1402 and the middle driving connecting rod 1403 are on a straight line, the hinge point of the first crank 14013 and the rear driving connecting rod 1402 is at the dead center position, and at this time the motion driving assembly is in a self-locking state.

[0067] Alternatively, in a more optimal implementation manner, a limit block 1101 is fixed on the seat frame assembly 11. The limit block 1101 is located between the rotating shaft 1401 and the middle driving connecting rod 1403. The limit block 1101 is used to limit the rotation angle of the first crank 14013. The limit block 1101 can be set in the following way: when the hinge position of the first crank 14013 and the rear driving connecting rod 1402 abuts against the limit block 1101, the rotation center of the rotating shaft 1401, the hinge point of the first crank 14013 and the rear driving connecting rod 1402, and the hinge point of the rear driving connecting rod 1402 and the middle driving connecting rod 1403 are on a straight line, that is, the hinge point of the first crank 14013 and the rear driving connecting rod 1402 is at the dead center position.

[0068] Alternatively, in a more optimal implementation manner, when the hinge position of the first crank 14013 and the rear driving connecting rod 1402 abuts against the limit block 1101, the first crank 14013 forms an angle a with the first crank 14013 at the dead center position. The value range of a is 0 < a ≤ 10°, and the preferred angle of a is 0 < a ≤ 0.5°;

[0069] When the first crank 14013 forms an angle a with the first crank 14013 at the dead center position and 0 < a ≤ 0.5°, its locking effect is stable, and the reset elastic force required for reset is small.

[0070] Refer to Figure 5, the linkage mechanism formed by the first crank 14013, the rear drive link 1402, the middle drive link 1403, and the front drive link 1404 has a dead point, that is, a self-locking point. The dead point position is generated when the center of the rotating shaft 1401, the hinge point between the first crank 14013 and the rear drive link 1402, and the hinge point between the rear drive link 1402 and the middle drive link 1403 are in a straight line. Theoretically, there are two dead point positions. One is on the side of the rotating shaft 1401 away from the middle drive link 1403, which is the far dead point position, and the other is between the rotating shaft 1401 and the middle drive link 1403, which is the near dead point position. The dead point position referred to in this embodiment is the near dead point position.

[0071] The bracket structure further includes a locking structure (not marked in the figure) that makes the hinge position between the first crank 14013 and the rear drive link 1402 abut against the limit block 1101.

[0072] The locking structure makes the hinge position between the first crank 14013 and the rear drive link 1402 abut against the limit block 1101, so that the linkage mechanism formed by the first crank 14013, the rear drive link 1402, the middle drive link 1403, and the front drive link 1404 forms self-locking, thereby keeping the pedal stably in the extended state.

[0073] Furthermore, in this embodiment, the bracket structure further includes a fixed mounting seat 17. The fixed mounting seat 17 is provided with a mounting sleeve 1701 and a fixing plate 1702. The mounting sleeve 1701 is for connecting the support base, and the fixing plate 1702 is fixedly inclined with the mounting sleeve 1701. The support base is an existing structure and is not shown in the figure.

[0074] The side of the seat frame assembly 11 connected to the rear pedal assembly 12 is rotatably connected to the fixing plate 1702. The locking structure includes a second crank 18 and a support link 19. The second crank 18 is fixedly connected to the rotating shaft 1401, and both ends of the support link 19 are rotatably connected to the second crank 18 and the fixing plate 1702 respectively.

[0075] Refer to Figure 6 , Figure 7, the second crank 18, the support link 19, the fixed plate 1702, and the seat frame assembly 11 form a four-bar linkage. When a person sits on the seat frame assembly 11 or applies pressure to the rear end of the seat frame assembly 11, the seat frame assembly 11 rotates around the position connected to the fixed plate 1702, and during the rotation process, the rear end of the seat frame assembly 11 descends while the front end rises, so that the inclination angle of the seat frame assembly 11 changes. In addition, the pressure acting on the seat frame assembly 11 generates a moment M, which overcomes the restoring elastic force of the first restoring elastic member 16, making the rotating shaft 1401 unable to stop and realizing the locking of the rotating shaft 1401. Since the rotating shaft 1401 is fixed to the first crank 14013, it also makes the linkage formed by the first crank 14013, the rear driving link 1402, the middle driving link 1403, and the front driving link 1404 form a self-locking state.

[0076] Furthermore, in a possible implementation manner, the bracket structure further includes a reset mechanism (not marked in the figure). The reset mechanism is used to drive the seat frame assembly 11 to rotate around the connection point with the fixed plate 1702 to achieve reset. During reset, the seat frame assembly 11 rotates with the end connected to the rear pedal assembly 12 downward and the end connected to the rotating shaft 1401 upward.

[0077] After the person gets up or the pressure applied to the rear end of the seat frame assembly 11 is removed, the reset mechanism can reset the inclination angle of the seat frame assembly 11, reduce the elastic force required by the first restoring elastic member 16. On the other hand, it also plays a role in assisting the pedal to retract and is beneficial to reducing the difficulty of structural design and production and manufacturing.

[0078] In this embodiment, the reset mechanism includes a reset rotating shaft 20 and a second restoring elastic member 21. The reset rotating shaft 20 is arranged at the connection position between the seat frame assembly 11 and the fixed plate 1702. The reset rotating shaft 20 is fixed to the seat frame assembly 11 and is rotatably connected to the fixed plate 1702. The second restoring elastic member 21 is arranged on the fixed plate 1702 and connected to the reset rotating shaft 20, and applies a rotational torque to the reset rotating shaft 20 to drive the reset rotating shaft 20 to rotate and drive the seat frame assembly 11 to reset.

[0079] Refer to Figure 7 , the second restoring elastic member 21 applies a restoring elastic force to the reset rotating shaft 20 through the fixed plate 1702, that is, generates a reset torque, such as M' shown in the figure. This torque M' makes the seat frame assembly 11 have a tendency to rotate and reset around the connection point with the fixed plate 1702, that is, makes the front end of the seat frame assembly 11 descend and the rear end rise, that is, the seat frame assembly 11 rotates clockwise around the connection point with the fixed plate 1702.

[0080] Further, in this embodiment, the reset rotating shaft 20 is fixedly connected to a reset plate 22. The second reset elastic member 21 is a spring. One end of the second reset elastic member 21 is connected to the fixed plate 1702, and the other end is connected to the reset plate 22.

[0081] Further, referring to Figure 2 , the second reset elastic member 21 is a compression spring. A screw rod 23 is fixed on the fixed plate 1702. A through hole (not marked in the figure) is formed on the reset plate 22. The screw rod 23 passes through the through hole of the reset plate 22. The second reset elastic member 21 is sleeved on the screw rod 23. A fixing nut 2301 is threadedly connected to the end of the screw rod 23 away from the fixed plate 1702. One end of the second reset elastic member 21 abuts against the fixing nut 2301, and the other end applies an elastic force to the reset plate 22 to make it abut against the fixed plate 1702.

[0082] Embodiment 2

[0083] The difference between this embodiment and Embodiment 1 is only that the first reset elastic member 16 is a torsion spring. One end of the first reset elastic member 16 is connected to the seat frame assembly 11, and the other end is connected to the rear pedal assembly 12. The first reset elastic member 16 applies a torsional force to the rear pedal assembly 12.

[0084] Embodiment 3

[0085] The difference between this embodiment and Embodiment 1 is only that the first reset elastic member 16 is a torsion spring. One end of the torsion spring is connected to the seat frame assembly 11, and the other end is connected to the rotating shaft 1401. The first reset elastic member 16 applies a torsional force to the rotating shaft 1401, so that the rotating shaft 1401 has a reverse movement trend, thereby assisting the movement driving assembly 14 to reverse, and further driving the rear pedal assembly 12 to reverse to realize the retraction of the pedal.

[0086] Embodiment 4

[0087] The difference between this embodiment and Embodiment 1 is only that the locking structure is a locking pin (not shown in the figure). A through hole for the locking pin to pass through is formed on the side of the seat frame assembly 11. The locking pin passes through and abuts against the first crank 14013 or the rear driving link 1402 or the connection position between the first crank 14013 and the rear driving link 1402, so that the hinged position of the first crank 14013 and the rear driving link 1402 abuts against the limiting block 1101 to realize locking. The hinged position of the first crank 14013 and the rear driving link 1402 is fixed by the locking pin to realize locking. In this process, since the locking pin needs to be repeatedly inserted and pulled out, the convenience is slightly worse than that of Embodiment 1.

[0088] Embodiment 5

[0089] The difference between this embodiment and Embodiment 1 is only that the reset mechanism includes a spring. One end of the spring is connected to the fixed mounting base 17, and the other end is connected to the seat frame assembly 11. The spring applies a torque to the seat frame assembly 11 to rotate around the connection point with the fixed plate 1702.

[0090] The spring only needs to provide a torque for the seat frame assembly 11 to rotate around the connection point with the fixed plate 1702, and this torque can cause the front end of the seat frame assembly 11 to descend and the rear end to rise.

[0091] In a possible implementation, the spring is a compression spring, and the spring is located on the side of the seat frame assembly 11 away from the rear pedal assembly 12.

[0092] In another possible implementation, the spring is a tension spring, and the spring is located on the side of the seat frame assembly 11 close to the rear pedal assembly 12.

[0093] Embodiment 6

[0094] The difference between this embodiment and Embodiment 1 is only that the reset mechanism includes a linear telescopic rod. One end of the linear telescopic rod is hinged to the fixed mounting base 17, and the other end is hinged to the seat frame assembly 11.

[0095] The linear telescopic rod can be connected to the front end of the seat frame assembly 11, or can be connected to the rear end of the seat frame assembly 11, or one can be provided at each of the front end and the rear end of the seat frame assembly 11.

[0096] By providing a reset torque to the seat frame assembly 11 through the linear telescopic rod, the seat frame assembly 11 can rotate around the connection point with the fixed plate 1702 in a state where the front end descends and the rear end rises.

[0097] Further, the linear telescopic rod is an electric telescopic rod, a pneumatic telescopic rod or a hydraulic telescopic rod.

[0098] Embodiment 7

[0099] The difference between this embodiment and Embodiment 1 is only that the second reset elastic member 21 is a tension spring. One end of the second reset elastic member 21 is fixed to the fixed plate 1702, and the other end is fixed to the reset plate 22. The second reset elastic member 21 applies an elastic force to the reset plate 22 to make it abut against the fixed plate 1702. By applying a pulling force to the fixed plate 1702 through the tension spring, the reset plate 22 abuts against the fixed plate 1702, and the purpose of providing a reset torque to the reset rotating shaft 20 and realizing the reset of the seat frame assembly 11 can also be achieved.

[0100] Embodiment 8

[0101] The present invention discloses a seat, including any one of the pedal devices in the above embodiments. The seat further includes components such as a backrest, a support base, and a seat cushion, which are not shown in the figure and are all prior art structures, and will not be elaborated here.

[0102] Further, the seat further includes a driving member for driving the movement driving assembly 14 to act.

[0103] In a possible implementation manner, referring to Figure 1 , the driving member is a handle 24, and the handle 24 is fixedly connected to the driving shaft for directly driving the driving shaft to rotate.

[0104] The way the handle 24 is fixed to the driving shaft can be detachable fixation or non-detachable fixation.

[0105] Embodiment 9

[0106] Referring to Figure 8 , the difference between this embodiment and Embodiment 1 is only that the driving member is a linear telescopic assembly, and the linear telescopic assembly includes a linear telescopic rod 25 and a driving crank 2501. The driving crank 2501 is fixed to the rotating shaft 1401. One end of the linear telescopic rod 25 is hinged to the seat frame assembly 11, and the other end is hinged to the driving crank 2501.

[0107] The linear telescopic rod 25 is an electric push rod, a pneumatic push rod or a hydraulic push rod.

[0108] In summary, for the pedal device and the seat provided by the present invention, when in use, the pedal is extended by means of the handle 24 or electric drive, and the hinged position of the first crank 14013 and the rear driving link 1402 abuts against the limit block 1101. When a person lies or sits on the seat frame assembly 11, the body gravity exerts a moment M on the seat frame assembly 11, and this moment overcomes the elastic force of the first elastic member and the elastic force of the second reset elastic member 21, so that the rotating shaft 1401 maintains a locked state, making the linkage mechanism formed by the first crank 14013, the rear driving link 1402, the middle driving link 1403 and the front driving link 1404 form self-locking, that is, using the body gravity to provide a supporting force for the footrest;

[0109] When a person gets up, without the suppression of body weight, the seat frame assembly 11 realizes inclination reset under the action of the second reset elastic member 21, and the rear pedal assembly 12 and the front pedal assembly 13 realize auxiliary retraction under the auxiliary action of the first elastic member. In the driving mode of the linear telescopic rod, the effect of power consumption saving can be achieved, and in the manual driving mode, automatic folding and storage can be realized, with a fast retraction speed, and having the advantages of convenience, labor saving and rapidity.

[0110] The technical means disclosed in the solution of the present invention are not limited to the technical means disclosed in the above embodiments, but also include technical solutions formed by any combination of the above technical features. It should be noted that for those of ordinary skill in the art in this technical field, without departing from the principle of the present invention, several improvements and retouches can be made, and these improvements and retouches are also regarded as the protection scope of the present invention.

Claims

1. A bracket structure, characterized in that, include: A seat frame assembly (11); A footrest assembly rotatably connected to the seat frame assembly (11); A motion drive assembly (14) for driving the footrest assembly to rotate relative to the seat frame assembly (11); a first resetting elastic member (16) disposed on the seat frame assembly (11) and connected to the motion driving assembly (14) or the pedal assembly, wherein the first resetting elastic member (16) provides a resetting elastic force to indirectly or directly drive the pedal assembly to rotate relative to the seat frame assembly (11) to be retracted; It also includes a fixed mounting seat (17) and a supporting link (19), the seat frame assembly (11) is hingedly connected to the fixed mounting seat (17) so as to be able to swing up and down, and the two ends of the supporting link (19) are rotatably connected to the motion drive assembly (14) and the fixed mounting seat (17) respectively; when the footrest assembly is in an outwardly opened state, the seat frame assembly (11) is pressed and swings downward relative to the fixed mounting seat (17), the seat frame assembly (11) drives the motion drive assembly (14) to self-lock through the supporting link (19); It also includes a handle (24), the handle (24) being in driving connection with the motion drive assembly (14); The motion driving assembly (14) comprises a rotating shaft (1401), a rear driving link (1402), a middle driving link (1403) and a front driving link (1404) which are rotatably connected in sequence, the rotating shaft (1401) is rotatably connected to the seat frame assembly (11), and the front driving link (1404) is rotatably connected to the pedal assembly; The first resetting elastic member (16) is connected to at least one of the rotating shaft (1401), the rear driving connecting rod (1402), the middle driving connecting rod (1403) and the front driving connecting rod (1404); A first crank (14013) and a second crank (18) are fixed to the rotating shaft (1401), the first crank (14013) being hinged to the rear driving connecting rod (1402), and the second crank (18) being hinged to the supporting connecting rod (19); When the footrest assembly is opened outward, the seat frame assembly (11) is pressed and swings downward relative to the fixed mounting seat (17), and the seat frame assembly (11) drives the rotating shaft (1401) to rotate, so that the hinge point between the first crank (14013) and the rear driving connecting rod (1402) is maintained at the dead point or bypasses the dead point, so as to achieve self-locking of the motion driving assembly (14).

2. The bracket structure according to claim 1, characterized in that, It also includes an elastic reset mechanism disposed between the fixed mounting seat (17) and the seat frame assembly (11), the elastic reset mechanism being used to drive the seat frame assembly (11) to rotate relative to the fixed mounting seat (17) to achieve reset.

3. The bracket structure according to claim 2, characterized in that, The elastic reset mechanism includes a reset rotating shaft (20) and a compression spring (21). Among them, the seat frame assembly (11) is hinged to the fixed mounting seat (17) through the reset rotating shaft (20), and the reset rotating shaft (20) is fixed on the seat frame assembly (11). The reset rotating shaft (20) is fixedly connected with a reset plate (22). A screw rod (23) is fixed on the fixed mounting seat (17). The screw rod (23) passes through the reset plate (22) and is threadedly connected with a fixed nut (2301). The compression spring (21) is sleeved on the screw rod (23). One end of the compression spring (21) abuts against the fixed nut (2301), and the other end of the compression spring (21) applies an elastic force to the reset plate (22) so that the reset plate (22) abuts against the fixed mounting seat (17).

4. The bracket structure according to claim 1, characterized in that, A limiting block (1101) for limiting the rotation angle of the first crank (14013) is fixed on the seat frame assembly (11). The limiting block (1101) is located between the rotating shaft (1401) and the middle driving connecting rod (1403).

5. The bracket structure according to claim 1, characterized in that, It further includes a linear telescopic assembly, and the linear telescopic assembly is in transmission connection with the motion driving assembly (14).

6. A seat, characterized in that, It includes the bracket structure according to any one of claims 1-5.

Images