Pedal adjusting mechanism and seat

Abstract

The utility model discloses a pedal adjusting mechanism and a seat, the pedal adjusting mechanism comprises a mounting beam, a multi-connecting-rod mechanism and a pedal mounting plate, the rear end of the multi-connecting-rod mechanism is connected with the mounting beam, and the pedal mounting plate is arranged at the front end of the multi-connecting-rod mechanism; a ratchet wheel is arranged at the rear end of the multi-connecting-rod mechanism, a gear shifting poking piece is coaxially arranged on one side of the ratchet wheel, the maximum radius of the gear shifting poking piece is larger than or equal to the outer circle radius of the ratchet wheel, a pawl is arranged on the installation beam in a swinging mode, and the multi-connecting-rod mechanism is matched with the ratchet wheel, the pawl and the gear shifting poking piece in a linkage mode. And stretching, retracting, overturning, moving and locking of the pedal mounting plate are controlled. According to the embodiment of the utility model, the multi-connecting-rod mechanism is matched with the ratchet wheel, the pawl and the gear shifting piece, so that the integrated linkage with the pedal mounting plate is achieved, a user only needs to turn over the pedal with one hand to realize the regulation and the switching of stretching, retracting, turning and stopping and moving states in one step, the operation is simple, and the use is more convenient.

Description

TECHNICAL FIELD

[0001] The utility model relates to furniture technical field especially, and it is a kind of pedal adjusting mechanism and seat. BACKGROUND

[0002] Seat is one of furniture varieties, and it is a seat with long history.Modern seat generally includes bottom support, seat and backrest three parts, and some office chairs will be provided with foot pedal for placing feet, to provide more comfortable riding experience for rider.

[0003] In prior art, such as the utility model patent with announcement number CN206548194U, discloses a kind of adjustable office chair, including foot pedal, backrest and seat, seat is symmetrically provided with hinged support on two sides, the upper end of foot pedal and the lower end of backrest are fixedly provided with hinged shaft, seat is hinged with foot pedal and backrest;It further includes locking mechanism arranged at hinge, locking mechanism includes fixed rod, elastic member, recess and fixed rod seat, fixed rod seat is directly fixedly connected with seat, and is provided with counterbore;Fixed rod includes fixed part, connecting part and stretching part, one end of connecting part is connected with fixed part, the other end passes through counterbore and extends to the outside of fixed rod seat, and then is connected with stretching part, so that fixed part can slide in the large end of counterbore;Elastic member is sleeved on the outside of connecting part, and the lower end of elastic member is connected with the end surface of fixed part, and the upper end is connected with the wall of counterbore;The recess is arranged on the outer wall of hinged shaft and is matched with fixed part, so that fixed part can be clamped into recess.

[0004] The scheme is matched with fixed rod and recess, in use, only need to lift fixed rod to make fixed part disengage from recess, to rotate backrest and foot pedal, to adjust the angle of backrest and foot pedal.But, the locking mechanism needs to be lifted by user with one hand when adjusting, and the other hand is operated, double operation is more troublesome, and it is not convenient to use. UTILITY MODEL CONTENTS

[0005] Therefore, the utility model provides a kind of pedal adjusting mechanism and seat, to solve the problem of adjusting operation of seat pedal adjusting mechanism in prior art is more troublesome, not enough convenient to use.

[0006] To achieve one or part or all of the above purposes or other purposes, the utility model provides a kind of pedal adjusting mechanism, comprising: mounting beam, multiple connecting rod mechanism and foot pedal mounting plate, the rear end of the multiple connecting rod mechanism is connected with the mounting beam, and the foot pedal mounting plate is arranged at the front end of the multiple connecting rod mechanism;

[0007] The rear end of the multiple connecting rod mechanism is provided with a ratchet wheel, and the ratchet wheel has a forward direction limit position and a reverse direction limit position:

[0008] When the ratchet wheel rotates from the reverse direction limit position to the forward direction limit position, the multi-link mechanism gradually extends and drives the pedal mounting plate to flip out;

[0009] When the ratchet wheel rotates from the forward direction limit position to the reverse direction limit position, the multi-link mechanism gradually retracts and drives the pedal mounting plate to flip in;

[0010] One side of the ratchet wheel is coaxially provided with a gear shifting tab, the maximum radius of the gear shifting tab is greater than or equal to the outer circle radius of the ratchet wheel;

[0011] The installation beam is swingably provided with a pawl, the pawl has a falling block state and a lifting block state:

[0012] When the pawl is in the falling block state, the end of the pawl can engage with the outer ratchet teeth of the ratchet wheel, so that the ratchet wheel can only rotate clockwise in one direction, and when the ratchet wheel is rotated clockwise to pass the forward direction limit position in the falling block state, the ratchet wheel can drive the gear shifting tab to swing clockwise, so that the pawl switches from the falling block state to the lifting block state;

[0013] When the pawl is in the lifting block state, the end of the pawl is separated from the ratchet wheel and abuts against the outer end of the gear shifting tab, and the ratchet wheel can rotate in both directions, and when the ratchet wheel is rotated counterclockwise to pass the reverse direction limit position in the lifting block state, the ratchet wheel can drive the gear shifting tab to swing counterclockwise, so that the pawl switches from the lifting block state to the falling block state.

[0014] Preferably, the gear shifting tab is in the shape of a fan, one end of the fan extends outwardly and is provided with a lug, the radius of the fan is less than the inner circle radius of the ratchet wheel, and the radius of the lug is greater than or equal to the outer circle radius of the ratchet wheel.

[0015] Preferably, the ratchet wheel has a double-layer structure, the gear shifting tab is arranged between the ratchet wheels, and a limiting pin is arranged between the ratchet wheels and can abut against one side of the straight edge of the gear shifting tab.

[0016] Preferably, a torsional spring is coaxially connected to the inner side of the pawl, and the torsional spring is used to provide a pre-tightening force for the front end of the pawl.

[0017] Preferably, the pawl is in the shape of a comma, the front end of the pawl is bifurcated and provided with an inner claw and an outer claw, the inner claw is used to abut against the outer end of the gear shifting tab, and the outer claw is used to engage with the outer ratchet teeth of the ratchet wheel.

[0018] Preferably, the multi-link mechanism comprises a first link, a second link, a third link and a fourth link, rear ends of the first link and the second link are hingedly connected on the mounting beam, a rear end of the third link is hingedly connected with a front end of the second link, a middle part of the third link is hingedly connected with a middle part of the first link, a rear end of the fourth link is hingedly connected with a front end of the first link, front ends of the third link and the fourth link are respectively hingedly connected with two ends of the pedal mounting plate, clockwise swinging of the first link can drive the multi-link mechanism to expand, counterclockwise swinging of the first link can drive the multi-link mechanism to fold.

[0019] Preferably, the ratchet is integrally arranged in the rear end of the first link or the second link in a fan shape.

[0020] Preferably, a spring is connected on the mounting beam, the other end of the spring is hung on the middle part of the second link, clockwise swinging of the second link can make the spring stretch, counterclockwise swinging of the second link can make the spring retract.

[0021] Preferably, an electric push rod is arranged on the mounting beam, a telescopic end of the electric push rod is connected on the middle part of the second link, elongation of the electric push rod can drive the second link to swing clockwise, shortening of the electric push rod can drive the second link to swing counterclockwise.

[0022] The utility model further provides: a seat, including the chassis and above described pedal adjusting mechanism, the chassis includes crossbeam and two mounting beams, the crossbeam and two mounting beams are connected in " Gong " type.

[0023] The embodiment of the utility model is implemented, and has the following beneficial effects:

[0024] After the pedal adjusting mechanism is adopted, the multi-link mechanism, the ratchet, the pawl and the gear shifting tab are matched with each other, the pedal mounting plate is integrally linked, a user only needs to turn the pedal with one hand, and the stretching, folding, turning, stopping and moving states can be controlled and switched in one step, the operation is simple, and the use is more convenient. DRAWINGS

[0025] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or the prior art description, and obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can be obtained without creative labor on the basis of these drawings.

[0026] Wherein:

[0027] Figure 1The overall structure schematic diagram of the pedal adjusting mechanism is provided in the utility model.

[0028] Figure 2 The partial structure explosion schematic diagram of the pedal adjusting mechanism is provided in the utility model.

[0029] Figure 3 The structure schematic diagram of the pawl and the gear shifting tab of the pedal adjusting mechanism is provided in the utility model.

[0030] Figure 4 The state schematic diagram of the pawl, the ratchet wheel and the gear shifting tab of the pedal adjusting mechanism is provided in the utility model. Figure 1 ;

[0031] Figure 5 The state schematic diagram of the pawl, the ratchet wheel and the gear shifting tab of the pedal adjusting mechanism is provided in the utility model. Figure 2 ;

[0032] Figure 6 The state schematic diagram of the pawl, the ratchet wheel and the gear shifting tab of the pedal adjusting mechanism is provided in the utility model. Figure 3 ;

[0033] Figure 7 The structure installation schematic diagram of the pedal adjusting mechanism and the chassis is provided in the utility model.

[0034] The drawings show that: 10, mounting beam; 11, pawl; 111, inner claw; 112, outer claw; 12, torsion spring; 13, spring; 20, multi-connecting rod mechanism; 21, ratchet wheel; 211, limit pin; 22, first connecting rod; 23, second connecting rod; 24, third connecting rod; 25, fourth connecting rod; 30, foot pedal mounting plate; 40, gear shifting tab; 41, lug; 42, protrusion; 50, chassis; 51, cross beam. DETAILED DESCRIPTION

[0035] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the utility model belongs; the terms used in the specification of the application are only for the purpose of describing the specific embodiments and are not intended to limit the utility model; the terms "include" and "have" and any variations thereof in the specification and claims of the utility model and the above description of drawings are intended to cover the non-exclusive inclusion; the terms "first", "second" and the like in the specification and claims of the utility model or the above description of drawings are used to distinguish different objects, not to describe a particular order.

[0036] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of the present invention. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0037] To enable those skilled in the art to better understand the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0038] like Figures 1-7 The image shows an embodiment provided by this utility model.

[0039] This utility model embodiment provides a pedal adjustment mechanism; please refer to the appendix. Figure 1 As shown, the system includes: a mounting beam 10, a multi-link mechanism 20, and a foot pedal mounting plate 30. The foot pedal mounting plate 30 is used to mount the foot pedal. The rear end of the multi-link mechanism 20 is connected to the mounting beam 10, and the foot pedal mounting plate 30 is located at the front end of the multi-link mechanism 20, allowing it to move along with the movement of the multi-link mechanism 20. Conversely, moving the foot pedal mounting plate can also drive the multi-link mechanism 20 to move in the opposite direction. Specifically, the rear end of the multi-link mechanism 20 is provided with a ratchet 21. The ratchet 21 has a forward-direction limiting position and a reverse-direction limiting position. The forward-direction limiting position refers to the predetermined farthest position that the ratchet 21 can rotate to in the clockwise direction, and the reverse-direction limiting position refers to the predetermined farthest position that the ratchet 21 can rotate to in the counterclockwise direction. Specifically, this is reflected in the maximum predetermined angle of outward rotation or the maximum predetermined angle of inward rotation of the foot pedal. When the ratchet 21 rotates from the reverse-direction limiting position to the forward-direction limiting position, that is, when the ratchet 21 rotates in the clockwise direction, the multi-link mechanism 20... The foot pedal mounting plate 30 gradually extends and flips open; when the ratchet 21 rotates from the clockwise position to the counterclockwise position, that is, when the ratchet 21 rotates counterclockwise, the multi-link mechanism 20 gradually retracts and flips back the foot pedal mounting plate 30; depending on the usage requirements, the number of links, length and hinge points of the multi-link mechanism 20 can be designed to make the foot pedal extend forward or flip upward. This design scheme is a conventional technical means. To achieve the effect of extending or flipping, only a simple test is needed, which will not be elaborated here.

[0040] Corresponding to the ratchet wheel 21, the mounting beam 10 is swingably provided with a pawl 11, the ratchet wheel 21 cooperates with the pawl 11, and can control the one-way rotation of the ratchet wheel 21. The cooperation principle of the two is a conventional technology, which will not be explained here. Since in this embodiment, the pedal mounting plate 30 can be extended, retracted and locked in the middle, the rotation of the ratchet wheel 21 needs to be controlled so that it can only rotate in one direction or bidirectionally and be conveniently locked in the middle, so as to control and switch the movement state of the ratchet wheel 21. Therefore, a shift knob 40 is coaxially arranged on one side of the ratchet wheel 21, which is used to switch the clutching state of the pawl 11 and the ratchet wheel 21. The maximum radius of the shift knob 40 is greater than or equal to the outer circle radius of the ratchet wheel 21, so that the front end of the pawl 11 and the outer ratchet teeth of the ratchet wheel 21 can be isolated from each other.

[0041] For this purpose, the pawl 11 is provided with a falling state and a lifting state. Please refer to the attached Figures 4-6As shown, the two states can be simply understood as the front end of the pawl 11 falling and lifting: when the pawl 11 is in the falling state, the front end of the pawl 11 is lapped on the outer contour of the ratchet wheel 21, the end of the pawl 11 can be engaged with the outer teeth of the ratchet wheel 21, so that the ratchet wheel 21 can only rotate clockwise in one direction, in the falling state, when the ratchet wheel 21 rotates clockwise, the front end of the pawl 11 will slide along the outer contour of the ratchet wheel 21, the pawl 11 will not hinder the rotation of the ratchet wheel 21, if the ratchet wheel 21 is rotated counterclockwise at this time, the front end of the pawl 11 will be clamped between the outer teeth of the ratchet wheel 21, preventing the ratchet wheel 21 from rotating in the reverse direction, this state is embodied in the actual application as the process of normal unfolding or stretching of the pedal, when the ratchet wheel 21 is rotated clockwise to pass the clockwise limiting position, the ratchet wheel 21 can drive the shift paddle 40 to rotate clockwise, so that the front end of the pawl 11 is lapped on the outer end of the shift paddle 40, and the outer end of the shift paddle 40 is higher than the tooth tip of the outer teeth of the ratchet wheel 21, so that the outer teeth of the ratchet wheel 21 are disengaged from the restriction of the upwardly lifted front end of the pawl 11, that is, the pawl 11 is switched from the falling state to the lifting state; when the pawl 11 is in the lifting state, the end of the pawl 11 is separated from the ratchet wheel 21 and abuts against the outer end of the shift paddle 40, since the front end of the pawl 11 no longer forms a restriction on the outer teeth of the ratchet wheel 21 in this state, the ratchet wheel 21 can rotate freely in both directions, in the lifting state, the pedal can be randomly turned within a certain range during the pedal recovery process, when the ratchet wheel 21 is rotated counterclockwise to pass the counterclockwise limiting position, the ratchet wheel 21 can drive the shift paddle 40 to rotate counterclockwise, so that the front end of the pawl 11 slides off the outer end of the shift paddle 40 and is lapped on the outer contour of the ratchet wheel 21 again, so that the outer teeth of the ratchet wheel 21 return to the restriction of the front end of the pawl 11, that is, the pawl 11 is switched from the lifting state to the falling state.

[0042] In particular, please refer to the accompanying drawings Figures 2-3 As shown, the shift paddle 40 is in the shape of a fan, one end of the fan extends outwardly to be provided with a lug 41, the radius of the fan is smaller than the inner circular radius of the ratchet wheel 21, and the radius of the lug 41 is greater than or equal to the outer circular radius of the ratchet wheel 21, so that the front end of the pawl 11 abuts against the outer end of the lug 41 or is lapped on the outer contour of the ratchet wheel 21. In addition, a smooth protrusion 42 is further provided on the corner near the outer end of the lug 41, which can prevent the front end of the pawl 11 from sliding off the lug 41 in some accidental situations.

[0043] Further, please refer to the accompanying drawings Figures 2-3As shown, the ratchet wheel 21 has a double-layer structure, the shift paddle 40 is arranged between the ratchet wheels 21, and a limiting pin 211 is arranged between the ratchet wheels 21, which can abut against a straight side of the shift paddle 40. When the ratchet wheel 21 rotates counterclockwise to the reverse direction limiting position, the limiting pin 211 just abuts against the straight side of the shift paddle 40. If the ratchet wheel 21 continues to rotate counterclockwise, the shift paddle 40 can be driven to rotate counterclockwise. When the ratchet wheel 21 rotates clockwise to the forward direction limiting position, the limiting pin 211 just abuts against the other straight side of the shift paddle 40. If the ratchet wheel 21 continues to rotate clockwise, the shift paddle 40 can be driven to rotate clockwise.

[0044] Specifically, please refer to the accompanying drawings Figure 2 As shown, the inner side of the pawl 11 is coaxially connected with a torsion spring 12, which is used to provide a pre-tightening force for the front end of the pawl 11 to make the front end of the pawl 11 always keep the tendency of pressing the ratchet wheel 21. When the front end of the pawl 11 is lifted by the shift paddle 40, the torsion spring 12 accumulates elastic force. If the front end of the pawl 11 loses the support of the outer end of the shift paddle 40, it will fall back and press on the ratchet wheel 21 due to the release of the elastic force of the torsion spring 12.

[0045] Specifically, please refer to the accompanying drawings Figures 2-3 As shown, the pawl 11 is in the shape of a comma, and the front end of the pawl 11 is bifurcated to be provided with an inner claw 111 and an outer claw 112. The inner claw 111 is used to abut against the outer end of the shift paddle 40, and the outer claw 112 is used to engage with the outer ratchet teeth of the ratchet wheel 21. Through the arrangement of the inner claw 111 and the outer claw 112, the shift paddle 40 and the outer ratchet teeth of the ratchet wheel 21 can be better matched respectively, so that the shift is more smooth.

[0046] Specifically, please refer to the accompanying drawings Figure 1 As shown, the multi-link mechanism 20 includes a first link 22, a second link 23, a third link 24 and a fourth link 25. The rear ends of the first link 22 and the second link 23 are hingedly connected on the mounting beam 10. The rear end of the third link 24 is hingedly connected with the front end of the second link 23, and the middle part of the third link 24 is hingedly connected with the middle part of the first link 22. The rear end of the fourth link 25 is hingedly connected with the front end of the first link 22. The front ends of the third link 24 and the fourth link 25 are hingedly connected with the two ends of the pedal mounting plate 30 respectively. The clockwise swinging of the first link 22 can drive the multi-link mechanism 20 to unfold, and the counterclockwise swinging of the first link 22 can drive the multi-link mechanism 20 to fold.

[0047] Specifically, please refer to the accompanying drawings Figure 2 As shown, the ratchet wheel 21 is integrally arranged at the rear end of the first link 22 or the second link 23 in the shape of a fan, which is equivalent to distributing a certain number of outer ratchet teeth on the round corners of the rear end of the first link 22 or the second link 23, so as to improve the connection strength of the ratchet wheel 21 and the first link 22 or the second link 23.

[0048] Furthermore, when the foot pedal mounting plate 30 is fully retracted, the multi-link mechanism 20 may automatically unfold due to its own gravity and the gravity of the foot pedal mounting plate 30 and the foot pedal. Therefore, a corresponding mechanism that can overcome the influence of gravity can be selected.

[0049] In a specific implementation plan, please refer to the appendix. Figure 1 As shown, a spring 13 is connected to the mounting beam 10. The other end of the spring 13 is hooked to the middle of the second link 23. The second link 23 can stretch the spring 13 by swinging clockwise and retract the spring 13 by swinging counterclockwise. The spring 13 is used to hold the second link 23, thereby preventing the entire multi-link mechanism 20, foot pedal mounting plate 30 and foot pedal from automatically unfolding.

[0050] In another specific embodiment (not shown in the accompanying drawings), an electric push rod is provided on the mounting beam 10. The telescopic end of the electric push rod is connected to the middle of the second link 23. When the electric push rod extends, it can drive the second link 23 to swing clockwise. When the electric push rod shortens, it can drive the second link 23 to swing counterclockwise. Replacing the spring 13 with an electric push rod can prevent the multi-link mechanism 20 from falling down after being retracted. At the same time, it can also realize the electric control of the expansion or contraction of the multi-link mechanism 20, so that the pedal can be automatically expanded or retracted, making it more convenient to use.

[0051] This utility model also proposes: a seat, including a base frame 50 and a pedal adjustment mechanism, please refer to the attached document. Figure 7 As shown, the base frame 50 includes a crossbeam 51 and two mounting beams 10. The crossbeam 51 and the two mounting beams 10 are connected in an "I" shape. The front ends of the two mounting beams 10 are symmetrically provided with a multi-link mechanism 20 and a foot pedal mounting plate 30. The foot pedal can be installed between the two foot pedal mounting plates 30, or one foot pedal can be installed on each of the two foot pedal mounting plates 30.

[0052] Obviously, the embodiments described above are only some embodiments of this utility model, not all embodiments. The accompanying drawings show preferred embodiments of this utility model, but do not limit the patent scope of this utility model. This utility model can be implemented in many different forms; rather, the purpose of providing these embodiments is to provide a more thorough and comprehensive understanding of the disclosure of this utility model. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing specific embodiments, or make equivalent substitutions for some of the technical features. Any equivalent structures made using the content of this utility model specification and drawings, directly or indirectly applied to other related technical fields, are similarly within the patent protection scope of this utility model.

Claims

1. A pedal adjustment mechanism characterized by, The utility model relates to a kind of footrests, including: Mounting beam (10), multi-connecting rod mechanism (20) and footrest mounting plate (30), the rear end of the multi-connecting rod mechanism (20) is connected with the mounting beam (10), and the footrest mounting plate (30) is arranged at the front end of the multi-connecting rod mechanism (20); The rear end of the multi-connecting rod mechanism (20) is provided with a ratchet wheel (21), and the ratchet wheel (21) has a forward direction limit position and a reverse direction limit position: When the ratchet wheel (21) rotates from the reverse direction limit position to the forward direction limit position, the multi-connecting rod mechanism (20) gradually stretches and drives the footrest mounting plate (30) to overturn and unfold; When the ratchet wheel (21) rotates from the forward direction limit position to the reverse direction limit position, the multi-connecting rod mechanism (20) gradually folds and drives the footrest mounting plate (30) to overturn and retract; One side of the ratchet wheel (21) is coaxially provided with a shift knob (40), and the maximum radius of the shift knob (40) is greater than or equal to the outer circle radius of the ratchet wheel (21). The mounting beam (10) is swingably provided with a pawl (11), and the pawl (11) has a falling state and a lifting state: When the pawl (11) is in the falling state, the end of the pawl (11) can be engaged with the outer ratchet teeth of the ratchet wheel (21), so that the ratchet wheel (21) can only rotate clockwise in one direction, and when the ratchet wheel (21) is rotated clockwise to beyond the forward direction limit position in the falling state, the ratchet wheel (21) can drive the shift knob (40) to swing clockwise, so that the pawl (11) is switched from the falling state to the lifting state; When the pawl (11) is in the lifting state, the end of the pawl (11) is separated from the ratchet wheel (21) and abuts against the outer end of the shift knob (40), and the ratchet wheel (21) can rotate bidirectionally, and when the ratchet wheel (21) is rotated counterclockwise to beyond the reverse direction limit position in the lifting state, the ratchet wheel (21) can drive the shift knob (40) to swing counterclockwise, so that the pawl (11) is switched from the lifting state to the falling state.

2. The pedal adjustment mechanism of claim 1, wherein, The shift knob (40) is in the shape of a sector, one end of the sector extends outwardly and is provided with a lug (41), the radius of the sector is less than the inner circle radius of the ratchet wheel (21), and the radius of the lug (41) is greater than or equal to the outer circle radius of the ratchet wheel (21).

3. The pedal adjustment mechanism of claim 2, wherein, The ratchet wheel (21) has a double-layer structure, the shift knob (40) is arranged between the ratchet wheels (21), and a limiting pin (211) is arranged between the ratchet wheels (21), and the limiting pin (211) can abut against one side of the straight edge of the shift knob (40).

4. The pedal adjustment mechanism of claim 3, wherein, The inside of the pawl (11) is coaxially connected with a torsion spring (12), and the torsion spring (12) is used to provide a pre-tightening force for the front end of the pawl (11).

5. The pedal adjustment mechanism of claim 4, wherein, The pawl (11) is comma-shaped. The front end of the pawl (11) is forked with an inner pawl (111) and an outer pawl (112). The inner pawl (111) is used to abut against the outer end of the shift paddle (40), and the outer pawl (112) is used to mesh with the outer ratchet teeth of the ratchet wheel (21).

6. The pedal adjustment mechanism of claim 1, wherein, The multi-link mechanism (20) includes a first link (22), a second link (23), a third link (24), and a fourth link (25). The rear ends of the first link (22) and the second link (23) are hinged to the mounting beam (10) at intervals. The rear end of the third link (24) is hinged to the front end of the second link (23). The middle part of the third link (24) is hinged to the middle part of the first link (22). The rear end of the fourth link (25) is hinged to the front end of the first link (22). The front ends of the third link (24) and the fourth link (25) are respectively hinged to both ends of the foot pedal mounting plate (30). The first link (22) can cause the multi-link mechanism (20) to unfold when it swings clockwise, and the first link (22) can cause the multi-link mechanism (20) to retract when it swings counterclockwise.

7. The pedal adjustment mechanism of claim 6, wherein, The ratchet (21) is integrally arranged in a fan shape at the rear end of the first link (22) or the second link (23).

8. The pedal adjustment mechanism of claim 6, wherein, A spring (13) is connected to the mounting beam (10). The other end of the spring (13) is attached to the middle of the second connecting rod (23). The second connecting rod (23) can stretch the spring (13) by swinging clockwise and can retract the spring (13) by swinging counterclockwise.

9. The pedal adjustment mechanism of claim 6, wherein, An electric push rod is provided on the mounting beam (10). The telescopic end of the electric push rod is connected to the middle of the second connecting rod (23). When the electric push rod extends, it can drive the second connecting rod (23) to swing clockwise. When the electric push rod shortens, it can drive the second connecting rod (23) to swing counterclockwise.

10. A seat, characterized by The device includes a base frame (50) and a pedal adjustment mechanism as described in any one of claims 1-9. The base frame (50) includes a crossbeam (51) and two mounting beams (10), which are connected in an "I" shape.

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