CN116195847A - Pedal mechanism and leisure sofa chair - Google Patents

Abstract

The invention discloses a pedal mechanism, comprising: the fixed rod is used for being mounted to the bottom of the bearing surface of the chair seat; the telescopic rod group comprises a first connecting rod, a second connecting rod, a third connecting rod, a fourth connecting rod and a pedal connecting seat, wherein the first end of the first connecting rod and the first end of the second connecting rod are respectively hinged to the fixed rod, the first end of the third connecting rod and the first end of the fourth connecting rod are respectively hinged to the pedal connecting seat, the second end of the first connecting rod is hinged to the second end of the third connecting rod, the second end of the second connecting rod is hinged between two ends of the third connecting rod, and the second end of the fourth connecting rod is hinged between two ends of the second connecting rod; the driving device is configured to drive the rotating rod to rotate, and the rotating rod pushes the power rod to drive the telescopic connecting rod group to extend or retract. The pedal mechanism occupies small space of the installation height, is higher in lifting height, and can improve the overall comfort level of the leisure sofa. The invention also discloses a leisure couch.

Description

Pedal mechanism and leisure sofa chair

Technical Field

The invention relates to the technical field of furniture, in particular to a pedal mechanism and a leisure sofa.

Background

With the development of social economy, couch with functionality has been increasingly introduced into people's daily lives, and leisure couch with electrically-stretched pedals has also been very popular. The functional sofa comprises a pedal stretching device, a seat frame and the like, wherein sponge and a covering are added on the top surface of the seat frame to form a seat surface, and the pedal, the seat surface and a backrest are subjected to different angle and position change adjustment through the series of mechanical linkage actions of all parts of the seat frame so as to realize different conversion of a user in a sofa sitting posture, a leisure posture, a lying posture and the like.

The seat surface height of the finished leisure sofa chair is in a standard height range according to the comfort level of the human body and the requirements of different heights, and the leisure sofa chair on the market at present has higher seat frame height due to the limitation of a mechanical structure. The higher the seat frame, the thinner the thickness of the seat surface and the sponge skin will be, resulting in no better sitting comfort when the user sits on the leisure sofa seat surface. Meanwhile, the shape of the seat surface finished product is limited due to the fact that the thickness of the sponge leather is thinner, so that the leisure sofa chair has no better aesthetic property.

The pedal stretching device of the leisure sofa chair is realized through different mechanical structure designs, and has a full-connecting-rod structure and a structure mode of using a guide rail and a connecting rod. However, the existing pedal stretching device has the following problems:

(1) The full-connecting-rod structure is used, the number of the connecting rod parts is large, the height space below the seat frame is occupied in the rotating process of the connecting rod, and if the height of the seat frame is reduced, the connecting rod parts can scratch the ground, so that a mechanical device is damaged;

(2) When the pedal connecting rod part extends to the outside of the seat frame, the height of the extending pedal and the top surface of the seat frame is smaller, so that after the seat frame is covered with the sponge, the pedal is lower than the seat surface of the leisure sofa chair, and the better height of lifting the foot cannot be achieved, thereby affecting the comfort level of a user.

Disclosure of Invention

In order to overcome at least one defect of the prior art, the invention provides a pedal mechanism and a leisure sofa, wherein the pedal mechanism occupies smaller space below a seat, is convenient for reducing the overall seat height of the leisure sofa, has higher lifting height, and ensures that the pedal of the leisure sofa is better matched with the seat surface height of the leisure sofa, thereby improving the overall comfort of the leisure sofa.

The invention adopts the technical proposal for solving the problems that:

a pedal mechanism comprising:

the fixed rod is used for being mounted to the bottom of the bearing surface of the chair seat;

the telescopic rod group comprises a first connecting rod, a second connecting rod, a third connecting rod, a fourth connecting rod and a pedal connecting seat, wherein the first end of the first connecting rod and the first end of the second connecting rod are respectively hinged to the fixed rod, the first end of the third connecting rod and the first end of the fourth connecting rod are respectively hinged to the pedal connecting seat, the second end of the first connecting rod is hinged to the second end of the third connecting rod, the second end of the second connecting rod is hinged between two ends of the third connecting rod, and the second end of the fourth connecting rod is hinged between two ends of the second connecting rod;

the rotating rod is rotationally connected to the fixed rod;

the first end of the power rod is eccentrically hinged to the rotating rod, and the second end of the power rod is hinged to one connecting rod of the telescopic rod group;

the driving device is configured to drive the rotating rod to rotate, and the rotating rod pushes the power rod to drive the telescopic connecting rod group to extend or retract.

Further, in the extended state of the telescopic link group, a height difference between the upper surface of the step plate connecting seat and the upper surface of the fixing rod is 140mm or more in the vertical direction.

Further, a distance between the first end hinge point of the second connecting rod and the second end hinge point of the second connecting rod is smaller than or equal to 153mm, and a distance between the first end hinge point of the third connecting rod and the second end hinge point of the third connecting rod is larger than or equal to 280mm.

Further, the hinge point of the second connecting rod and the fixed rod is a second hinge point, the hinge point of the third connecting rod and the first connecting rod is a third hinge point, the hinge point of the second connecting rod and the fourth connecting rod is a fourth hinge point, the hinge point of the second connecting rod and the third connecting rod is a fifth hinge point, and the hinge point of the third connecting rod and the pedal connecting seat is a sixth hinge point;

in the second connecting rod, the fourth hinge point is positioned at one side of the connecting line of the second hinge point and the fifth hinge point;

in the third link, the fifth hinge point is located on one side of the line connecting the sixth hinge point and the third hinge point.

Further, the fourth hinge point is located the second hinge point and the one side of fifth hinge point line towards the telescopic link group direction of stretching out and drawing back, and the fifth hinge point is located the sixth hinge point and the one side of third hinge point line towards the telescopic link group direction of stretching out and drawing back.

Further, the dead lever is including the horizontal segment that connects gradually, roll over the section and lift the section down, along vertical direction, rolls over the section and buckle downwards relative horizontal segment down, lifts the section and rolls over the section and upwards lifts down relatively, and lifts the free end of section and be higher than the horizontal segment, and the first end of first connecting rod and the first end of second connecting rod articulate respectively in the free end of lifting the section down, and the dwang rotates to be connected in the section of rolls over down.

Further, the lower folding section is arc-shaped, the horizontal section and the lifting section are respectively connected to two ends of the lower folding section, and the horizontal section, the lower folding section and the lifting section are integrally formed.

Further, one end of the driving device is hinged to the horizontal section, and the other end of the driving device is hinged to the rotating rod eccentrically through a first crank, and the first crank extends along the radial direction of the rotating rod.

Further, the first end of the power rod is eccentrically hinged to the rotating rod through a second crank extending in the radial direction of the rotating rod, and the second end of the power rod is hinged to the second connecting rod.

Based on the same conception, the invention also discloses a leisure sofa chair, which comprises a chair seat, a pedal and the pedal mechanism, wherein the pedal mechanism is arranged at the bottom of a bearing surface of the chair seat, and the pedal is arranged on a pedal connecting seat of the pedal mechanism;

when the telescopic connecting rod group of the pedal mechanism is in an extending state, the height difference between the upper surface of the pedal and the bearing surface of the seat is 50-150 mm along the vertical direction, and the distance between the bearing surface of the seat and the ground is less than or equal to 270mm.

In summary, the pedal mechanism and the leisure sofa chair provided by the invention have the following technical effects:

1) According to the pedal mechanism provided by the invention, through the optimized combination of the telescopic rod groups, cross hinging does not exist between every two connecting rods, at the moment, the first part of the third connecting rod, the fixed rod, the first connecting rod and the second connecting rod form a first quadrilateral connecting rod structure, and the part of the second connecting rod, the second part of the third connecting rod, the fourth connecting rod and the pedal connecting seat form a second quadrilateral connecting rod structure;

2) The pedal mechanism has compact structure, simplicity, novelty, smaller overall volume and strong universality, and can be assembled into frames of different types of couch seats;

3) The whole intensity of dead lever is high, long service life, and the swing orbit of dwang, the promotion orbit of power pole and drive arrangement's swing orbit all can not influence this step mechanism and install the height in the seat support, when calculating the seat support bottom height space that step mechanism occupy, only need consider the activity orbit of telescopic link group can, further reduce the whole seat height of seat support.

Drawings

Fig. 1 is a schematic perspective view of a leisure couch according to an embodiment of the present invention;

FIG. 2 is a schematic side view of the overall height of the seat and the height of the foot rest of the leisure couch according to the embodiment of the present invention;

FIG. 3 is a perspective view showing an expanded state of a pedal mechanism according to an embodiment of the present invention;

FIG. 4 is a side cross-sectional view of an extended state of a step mechanism according to an embodiment of the present invention;

FIG. 5 is a side cross-sectional view of an intermediate state of the step mechanism of an embodiment of the present invention;

fig. 6 is a side cross-sectional view of a pedal mechanism in a contracted state according to an embodiment of the present invention.

Wherein the reference numerals have the following meanings:

1. a fixed rod; 11. a horizontal section; 12. a lower folding section; 13. lifting the section; 2. a telescopic rod group; 21. a first link; 22. a second link; 23. a third link; 24. a fourth link; 25. a pedal connecting seat; 201. a first hinge point; 202. a second hinge point; 203. a third hinge point; 204. a fourth hinge point; 205. a fifth hinge point; 206. a sixth hinge point; 207. a seventh hinge point; 208. an eighth hinge point; 3. a rotating lever; 301. an axis of rotation; 31. a first crank; 32. a second crank; 4. a power lever; 5. a driving device; 6. a seat; 7. foot pedals.

Detailed Description

For a better understanding and implementation, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, merely to facilitate description of the present invention and simplify the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

Referring to fig. 1 and 2, the invention discloses a leisure sofa chair, which comprises a pedal mechanism, a seat 6 and a pedal 7, wherein sponge can be added on the bearing surface of the seat 6 and the seat can be covered, so that the seat surface of the leisure sofa chair is formed, the pedal mechanism is arranged at the bottom of the bearing surface of the seat 6, the pedal 7 is arranged at the extending end of the pedal mechanism, the pedal 7 can be lifted upwards when the pedal mechanism extends, and the pedal 7 can be retracted and attached to the front side of the seat 6 or the bottom of the seat 6 when the pedal mechanism contracts.

Of course, in other preferred embodiments, the step mechanism may also be mounted on a multi-position couch or on other types of lounge chairs.

Referring to fig. 3 and 4, in the present embodiment, the pedal mechanism includes two fixed rods 1, two telescopic rod groups 2, a rotating rod 3, two power rods 4 and a driving device 5. Wherein, the fixed bars 1 are used as bearing pieces, and the two fixed bars 1 are oppositely arranged at the bottom of the bearing surface of the chair seat 6 so as to realize the installation of the pedal mechanism on the chair seat 6; the telescopic rod groups 2 are used as output pieces, the two telescopic rod groups 2 are respectively hinged to different fixing rods 1, the foot pedals 7 are arranged at the output ends of the two telescopic rod groups 2, the foot pedals 7 are driven to lift when the telescopic rod groups 2 extend, and the foot pedals 7 are driven to retract when the telescopic rod groups 2 retract; the rotating rods 3 and the power rods 4 form a transmission component of the pedal mechanism, the driving device 5 is used as a power source, the rotating rods 3 are rotatably connected between the two fixed rods 1, the first end of each power rod 4 is respectively and eccentrically hinged to the rotating rod 3, the second end of each power rod 4 is hinged to one connecting rod of different telescopic rod groups 2, the driving device 5 is configured to drive the rotating rods 3 to rotate, the rotating rods 3 push the power rods 4 to drive the telescopic rod groups 2 to extend or retract, specifically, the driving device 5 is an electric push rod or an air cylinder, one end of the driving device 5 is hinged to one fixed rod 1, and the other end of the driving device 5 is eccentrically hinged to the rotating rods 3.

Importantly, the telescopic rod set 2 comprises a first connecting rod 21, a second connecting rod 22, a third connecting rod 23, a fourth connecting rod 24 and a pedal connecting seat 25, wherein the first end of the first connecting rod 21 and the first end of the second connecting rod 22 are respectively hinged to the fixed rod 1, the first end of the third connecting rod 23 and the first end of the fourth connecting rod 24 are respectively hinged to the pedal connecting seat 25, the second end of the first connecting rod 21 is hinged to the second end of the third connecting rod 23, the second end of the second connecting rod 22 is hinged between two ends of the third connecting rod 23, and the second end of the fourth connecting rod 24 is hinged between two ends of the second connecting rod 22.

Specifically, referring to fig. 3 and 4, each hinge point in the telescopic link group 2 is defined as follows:

the hinge point of the first connecting rod 21 and the fixed rod 1 is a first hinge point 201, the hinge point of the second connecting rod 22 and the fixed rod 1 is a second hinge point 202, the hinge point of the first connecting rod 21 and the third connecting rod 23 is a third hinge point 203, the hinge point of the second connecting rod 22 and the fourth connecting rod 24 is a fourth hinge point 204, the hinge point of the second connecting rod 22 and the third connecting rod 23 is a fifth hinge point 205, the hinge point of the third connecting rod 23 and the pedal connecting seat 25 is a sixth hinge point 206, and the hinge point of the fourth connecting rod 24 and the pedal connecting seat 25 is a seventh hinge point 207.

Then, as can be seen from a combination of the above descriptions, the specific positions of each hinge point on the different links are as follows:

in the first link 21, the first hinge point 201 is located at a first end of the first link 1, and the third hinge point 203 is located at a second end of the first link 1;

in the second link 22, the second hinge point 202 is located at a first end of the second link 22, the fifth hinge point 205 is located at a second end of the second link 22, and the fourth hinge point 204 is located between the second hinge point 202 and the fifth hinge point 205;

in the third link 23, a sixth hinge point 206 is located at a first end of the third link 23, a third hinge point 203 is located at a second end of the third link 23, and a fifth hinge point 205 is located between the sixth hinge point 206 and the third hinge point 203;

in the fourth link 24, the seventh hinge point 207 is located at a first end of the fourth link 24 and the fourth hinge point 204 is located at a second end of the fourth link 24;

in addition, in the step board connecting seat 25, the sixth hinge point 206 and the seventh hinge point 207 are respectively located on the step board connecting seat 25 at intervals.

In the above-mentioned scheme, through the optimization combination of telescopic link group 2, make every two connecting rods between have no cross hinge (needs to be explained, what refers to in this scheme is cross hinge, refers to: the hinge point between the two connecting rods is located at the non-end part position of the two connecting rods, namely, in each connecting rod, two sides of the hinge point are respectively provided with two other hinge points), at this time, the first part of the third connecting rod 23, the fixed rod 1, the first connecting rod 21 and the second connecting rod 22 form a first quadrilateral connecting rod structure, a part of the second connecting rod 22, the second part of the third connecting rod 23, the fourth connecting rod 24 and the pedal connecting seat form a second quadrilateral connecting rod structure, and the design of the rotating rod 3 and the power rod 4 is added, so that the number of rod parts used by the pedal mechanism is small, the space below the bearing surface of the seat 6 occupied in the rotating process of the telescopic rod group 2 is small, thereby the overall seat height of the seat 6 can be reduced, more thickness spaces with sponge leather seat can be reserved, the sitting comfort of the seat surface is improved, and when the telescopic rod group 2 stretches out, the pedal connecting seat 25 drives the pedal 7 to a higher height, the pedal and the sofa seat can be better matched with the seat surface, and the sofa seat can be better lifted, and the sitting comfort of the sofa can be better, and the sitting comfort of the sofa seat can be better.

In particular, referring to fig. 4, in the extended state of the telescopic link group 2, the height difference C between the upper surface of the step plate connecting seat 25 and the upper surface of the fixing rod 1 is 140mm or more, preferably 150mm or more in the vertical direction.

Referring to fig. 5, the distance D between the first end hinge point (i.e., the second hinge point 202) of the second link 22 and the second end hinge point (i.e., the fifth hinge point 205) of the second link 22 is less than or equal to 153mm, preferably 140mm.

The distance E between the first end hinge point (i.e., the sixth hinge point 206) of the third link 23 and the second end hinge point (i.e., the third hinge point 203) of the third link 23 is 280mm or more, preferably 300mm.

In addition, the overall length of the second link 22 is greater than that of the first link 21; the overall length of the fourth link 23 is greater than the overall length of the fourth link 24.

Through physical proofing verification, referring to fig. 2, the overall height a of the seat 6 (i.e. the distance between the bearing surface of the seat 6 and the ground) can be reduced to 270mm or less, preferably, the height a is 260mm to 240mm; the height difference B between the raised foot pedal 7 and the supporting surface of the seat 6 can reach 50 mm-150 mm, and the preferred height difference B is 130 mm-150 mm, so that the overall comfort level of the leisure sofa chair is ensured. Of course, the parameters as above may be adjusted within the relevant range as required.

Referring to fig. 4, in the present embodiment, preferably, in the second link 22, the fourth hinge point 204 is located on one side of the connection line between the second hinge point 202 and the fifth hinge point 205, and in particular, the fourth hinge point 204 is located on one side of the connection line between the second hinge point 202 and the fifth hinge point 205 toward the extending direction of the telescopic link group 2.

Referring to fig. 4, in the present embodiment, preferably, in the third link 23, the fifth hinge point 205 is located on one side of the line connecting the sixth hinge point 206 and the third hinge point 203, and in particular, the fifth hinge point 205 is located on one side of the line connecting the sixth hinge point 206 and the third hinge point 203 toward the extending direction of the telescopic link group 2.

When the pedal mechanism is in the extended state, the second link 22 is positioned on the side of the first link 21 facing the pedal connecting seat 25, and the second link 22 and the fourth link 24 are positioned on the inner side of the angle defined by the first link 21 and the third link 23.

Through the deflection of the positions of the hinge points and the relative positions of the connecting rods, the pedal mechanism is compact in structure, simple and novel, small in whole size and high in universality, and can be assembled into frames of different types of couch seats.

Referring to fig. 3 and 4, in the present embodiment, in order to realize eccentric hinging of the driving device 5 on the rotating rod 3, the rotating rod 3 is provided with a first crank 31, the first crank 31 extends along the radial direction of the rotating rod, and the output end of the driving device 5 is hinged on the first crank 31.

Similarly, in order to realize eccentric articulation of the power rod 4 on the rotating rod 3, the rotating rod 3 is provided with a second crank 32, the second crank 32 extends along the radial direction of the rotating rod, and the first end of the power rod 4 is articulated on the second crank 32.

In addition, the second end of the power rod 4 is hinged to the second link 22. Specifically, the hinge point of the power lever 4 and the second connecting rod 22 is an eighth hinge point 208; in the second link 22, the eighth hinge point 208 is located between the second hinge point 202 and the fourth hinge point 204.

In this way, the linear thrust of the driving device 5 can be better utilized to drive the telescopic rod group 2 to extend or retract in a rotating manner.

Of course, in other preferred embodiments, the second end of the power rod 4 may be hinged to the first link 21, and the telescopic rod set 2 can be driven to rotate.

Referring to fig. 3 and 4, in this embodiment, preferably, the fixing rod 1 includes a horizontal section 11, a lower folded section 12 and an upper folded section 13 connected in sequence, the lower folded section 12 is folded downward relative to the horizontal section 11 along a vertical direction, the upper folded section 13 is lifted upward relative to the lower folded section 12, a free end of the upper folded section 13 is higher than the horizontal section 11, a first end of the first connecting rod 21 and a first end of the second connecting rod 22 are respectively hinged to the free end of the upper folded section 13, the rotating rod 3 is connected to the lower folded section 12 in a rotating manner, and the driving device 5 is hinged to the horizontal section 11. That is, the first hinge point 21 and the second hinge point 22 are located at the free end of the lifting section 13, the rotation axis 301 of the rotation lever 3 is located at the lower folded section 12, and the hinge point of the driving device 5 is located at the horizontal section 11.

Specifically, the lower folding section 12 is arc-shaped, the horizontal section 11 and the lifting section 13 are respectively connected to two ends of the lower folding section 12, and the horizontal section 11, the lower folding section 12 and the lifting section 13 are integrally formed, so that the integral strength of the fixing rod 1 is ensured.

In the above-mentioned scheme about the fixing rod 1, the user's feet are placed on the foot rest 7, and the load is transferred to the free end of the lifting section 13 through the telescopic rod group 2 and dispersed to the folding section 12, so that the load can be well absorbed and digested, and the service life of the fixing rod 1 is prolonged.

On the other hand, a larger height difference is formed between the first hinging point 21 and the second hinging point 22 and the rotation axis 301, so that a larger movable space can be provided for the swing of the rotating rod 3 and the pushing of the power rod 4, and the installation height of the pedal mechanism in the seat 6 cannot be influenced by the swing track of the rotating rod 3 and the pushing track of the power rod 4; similarly, the first hinge point 21 and the second hinge point 22 form a smaller height difference with the hinge point of the driving device 5 on the fixed rod 1, and the swing amplitude of the driving device 5 in the telescopic process is basically maintained in a small range of up-and-down fluctuation of the horizontal plane in cooperation with the arrangement of the first crank 31, so that the installation height of the pedal mechanism in the seat 6 cannot be influenced by the swing track of the driving device 5. Thus, when calculating the height space of the bottom of the seat 6 occupied by the pedal mechanism, only the moving track of the telescopic rod group 2 needs to be considered, so that the overall seat height of the seat 6 is further reduced.

Referring to fig. 4 to 6, the pedal mechanism provided by the present invention has the following operation processes:

(1) Taking the contracted state shown in fig. 6 as an initial state, in the initial state, the driving device 5 extends, the rotating rod 3 is driven to rotate anticlockwise through the first crank 31, the rotating rod 3 drives the power rod 4 to move leftwards through the second crank 32, the power rod 4 pushes the second connecting rod 22 to rotate clockwise, so that the telescopic rod group 2 stretches out and lifts, and after passing through the intermediate state shown in fig. 5, the telescopic rod group enters the unfolded state shown in fig. 4;

(2) The driving device 5 contracts, the rotating rod 3 is driven to rotate clockwise through the first crank 31, the rotating rod 3 drives the power rod 4 to move rightwards through the second crank 32, and the power rod 4 pushes the second connecting rod 22 to rotate anticlockwise, so that the telescopic rod group 2 contracts, and after passing through the intermediate state shown in fig. 5, the telescopic rod group returns to the contracted state shown in fig. 6.

The technical means disclosed by the scheme of the invention is not limited to the technical means disclosed by the embodiment, and also comprises the technical scheme formed by any combination of the technical features. It should be noted that modifications and adaptations to the invention may occur to one skilled in the art without departing from the principles of the present invention and are intended to be within the scope of the present invention.

Claims (10)

1. A pedal mechanism, comprising:

the fixed rod is used for being mounted to the bottom of the bearing surface of the chair seat;

the telescopic rod group comprises a first connecting rod, a second connecting rod, a third connecting rod, a fourth connecting rod and a pedal connecting seat, wherein the first end of the first connecting rod and the first end of the second connecting rod are respectively hinged to the fixed rod, the first end of the third connecting rod and the first end of the fourth connecting rod are respectively hinged to the pedal connecting seat, the second end of the first connecting rod is hinged to the second end of the third connecting rod, the second end of the second connecting rod is hinged between two ends of the third connecting rod, and the second end of the fourth connecting rod is hinged between two ends of the second connecting rod;

the rotating rod is rotationally connected to the fixed rod;

the first end of the power rod is eccentrically hinged to the rotating rod, and the second end of the power rod is hinged to one connecting rod of the telescopic rod group;

the driving device is configured to drive the rotating rod to rotate, and the rotating rod pushes the power rod to drive the telescopic connecting rod group to extend or retract.

2. The pedal mechanism according to claim 1, wherein a height difference between an upper surface of the pedal attachment seat and an upper surface of the fixing rod in a vertical direction is 140mm or more in the extended state of the telescopic link group.

3. The pedal mechanism in accordance with claim 1 wherein a distance between the first end hinge point of the second link and the second end hinge point of the second link is 153mm or less and a distance between the first end hinge point of the third link and the second end hinge point of the third link is 280mm or more.

4. The pedal mechanism according to claim 1, wherein the hinge point of the second link and the fixed rod is a second hinge point, the hinge point of the third link and the first link is a third hinge point, the hinge point of the second link and the fourth link is a fourth hinge point, the hinge point of the second link and the third link is a fifth hinge point, and the hinge point of the third link and the pedal connecting seat is a sixth hinge point;

in the second connecting rod, the fourth hinge point is positioned at one side of the connecting line of the second hinge point and the fifth hinge point;

in the third link, the fifth hinge point is located on one side of the line connecting the sixth hinge point and the third hinge point.

5. The pedal mechanism of claim 4 wherein the fourth hinge point is located on a side of the second hinge point and fifth hinge point connection toward the extension direction of the telescopic link set, and the fifth hinge point is located on a side of the sixth hinge point and third hinge point connection toward the extension direction of the telescopic link set.

6. The pedal mechanism according to claim 1, wherein the fixing rod comprises a horizontal section, a lower folded section and an upper folded section which are sequentially connected, the lower folded section is folded downwards relative to the horizontal section along the vertical direction, the upper folded section is lifted upwards relative to the lower folded section, the free end of the upper folded section is higher than the horizontal section, the first end of the first connecting rod and the first end of the second connecting rod are respectively hinged to the free end of the upper folded section, and the rotating rod is connected to the lower folded section in a rotating manner.

7. The pedal mechanism according to claim 6, wherein the lower folding section is arc-shaped, the horizontal section and the upper lifting section are respectively connected to two ends of the lower folding section, and the horizontal section, the lower folding section and the upper lifting section are integrally formed.

8. The pedal mechanism in accordance with claim 6 wherein one end of the drive is hinged to the horizontal segment and the other end of the drive is hinged to the rotary lever eccentrically by a first crank extending radially of the rotary lever.

9. The pedal mechanism in accordance with claim 6 wherein the first end of the power rod is eccentrically hinged to the rotary rod by a second crank extending radially of the rotary rod, the second end of the power rod being hinged to the second link.

10. A leisure sofa chair, characterized by comprising a chair seat, a pedal and a pedal mechanism as claimed in any one of claims 1 to 9, wherein the pedal mechanism is arranged at the bottom of a bearing surface of the chair seat, and the pedal is arranged on a pedal connecting seat of the pedal mechanism;

when the telescopic connecting rod group of the pedal mechanism is in an extending state, the height difference between the upper surface of the pedal and the bearing surface of the seat is 50-150 mm along the vertical direction, and the distance between the bearing surface of the seat and the ground is less than or equal to 270mm.

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