CN217510140U - Seat support structure and seat - Google Patents

Abstract

The utility model discloses a seat supporting structure and seat, among this seat supporting structure, the curb plate interval is equipped with shank connecting rod sliding hole and back connecting rod sliding hole, set up and wear to locate shank connecting rod sliding hole in the first slider of first shank connecting rod slides, set up and wear to locate back connecting rod sliding hole in the second slider of first back connecting rod slides, the connecting rod is configured to drive the second slider and slide in back connecting rod sliding hole when first slider slides in shank connecting rod sliding hole, drive structure can drive first slider and slide in shank connecting rod sliding hole, first slider slides in shank connecting rod sliding hole and can drive leg assembly and stretch or contract, the second slider slides and can drive back assembly and lean forward or pitch backward in back connecting rod sliding hole. The seat support structure can adjust the seat to be converted among three postures, namely a sitting posture, a half lying posture and a full lying posture by using one driving structure, and has the advantages of simple structure and low cost.

Description

Seat support structure and seat

Technical Field

The utility model relates to a seat technical field especially relates to a seat supporting structure and seat.

Background

General people stand for a long time and can be more labourious, the time of sitting and lying is far more than the time of standing, along with the continuous improvement of people's standard of living, people pursue more comfortable and can alternate the seat of gesture, people sit on the seat, generally have three kinds of gestures, be the crooked and upright position of sitting in the back gesture of shank respectively, the half position of lying of shank stretching out and back is upright attitude, be fit for watching TV this moment to and the full position of lying that the shank stretched out and back is leaned on backward, be fit for the sleep or have a rest this moment. Thus, it is desirable that the leg structure of the seat be able to extend or retract and the backrest of the seat be able to tilt forward or backward. However, the existing seat has a complicated structure in which the leg structure and the backrest are controlled by two driving structures.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a seat supporting structure and seat to solve current seat and control shank structure and back respectively by two drive structure, problem that the structure is complicated.

To achieve the purpose, the utility model adopts the following technical proposal:

a seat support structure comprising:

the supporting structure comprises a leg component, a backrest component, a connecting rod and a side plate, wherein leg connecting rod sliding holes and backrest connecting rod sliding holes are formed in the side plate at intervals, the leg component comprises a first leg connecting rod, a first sliding piece arranged on the first leg connecting rod is slidably arranged in the leg connecting rod sliding holes, the backrest component comprises a first backrest connecting rod, a second sliding piece arranged on the first backrest connecting rod is slidably arranged in the backrest connecting rod sliding holes, and the connecting rod is configured to drive the second sliding piece to slide in the backrest connecting rod sliding holes when the first sliding piece slides in the leg connecting rod sliding holes;

a driving structure capable of driving the first slider to slide in the leg link sliding hole, the first slider sliding in the leg link sliding hole to have a first position, a second position and a third position, the second slider sliding in the backrest link sliding hole to have a fourth position, a fifth position and a sixth position, the second slider being located at the fourth position when the first slider is located at the first position; when the first slide is in the second position, the second slide is in the fifth position; when the first slide is in the third position, the second slide is in the sixth position;

when the first sliding piece is located at the first position or the second position, the leg assemblies are in an extended state; when the first slide is in the third position, the leg assembly is in a contracted state; when the second sliding piece is located at the fourth position, the backrest assembly is in a backward leaning state; when the second sliding piece is located at the fifth position or the sixth position, the backrest assembly is in a forward tilting state.

As an optimal scheme of the seat support structure, the driving structure includes a driving member, a first support rod and a second support rod, the housing of the driving member is hinged to the first support rod, the output shaft of the driving member is hinged to the second support rod, the first support rod is fixedly disposed on the side plate, and the second support rod is fixedly disposed on the first leg connecting rod.

As a preferable mode of the seat support structure, the driving member is an electric cylinder.

As a preferable scheme of the seat support structure, the number of the support structures is two, the two support structures are arranged at intervals, two ends of the first support rod are respectively and fixedly arranged on the side plates of the two support structures, and two ends of the second support rod are respectively and fixedly arranged on the first leg connecting rods of the two support structures.

As a preferable scheme of the seat support structure, the backrest assembly further includes a second backrest connecting rod and a backrest fixing plate, one end of the second backrest connecting rod is fixedly disposed on the side plate, the other end of the second backrest connecting rod is hinged to the backrest fixing plate, one end of the first backrest connecting rod is hinged to the backrest fixing plate, and the backrest fixing plate is used for mounting a backrest.

As a preferable embodiment of the seat support structure, the leg assembly further includes a second leg link, a third leg link, a fourth leg link, a fifth leg link, and a footrest, one end of the second leg link is hinged to the side plate at a first hinge point, the other end of the second leg link is hinged to the second hinge point, one end of the fourth leg link is hinged to the side plate, the other end of the fourth leg link is hinged to the fifth leg link, the third leg link and the fifth leg link are both hinged to the footrest, the first leg link and the second leg link are hinged to a third hinge point, the third hinge point is located between the first hinge point and the second hinge point, the fourth leg link is provided with a first protrusion, the third leg link is provided with a first slot and a second slot, and when the leg assembly is in an extended state, the first bulge is positioned in the first clamping groove; when the leg assembly is in a contraction state, the first protrusion is located in the second clamping groove, the second leg connecting rod is provided with a second protrusion, and the first leg connecting rod can be abutted to the second protrusion.

As a preferable scheme of the seat support structure, one end of the connecting rod and the first leg link are hinged to a fourth hinge point, the other end of the connecting rod and the first backrest link are hinged to a fifth hinge point, the first backrest link and the backrest fixing plate are hinged to a sixth hinge point, the fourth hinge point is located between the first sliding member and the third hinge point, and the fifth hinge point is located between the second sliding member and the sixth hinge point.

As a preferable mode of the seat support structure, the leg link sliding hole includes a first hole and a second hole that are communicated, and when the first slider is located at an end of the first hole away from the second hole, the first slider is located at the first position; when the first sliding part is positioned at the connecting line of the first hole and the second hole, the first sliding part is positioned at the second position; when the first sliding piece is positioned at one end of the second hole far away from the first hole, the first sliding piece is positioned at the third position;

the backrest connecting rod sliding hole comprises a third hole and a fourth hole which are communicated, and when the second sliding piece is positioned at one end of the third hole far away from the fourth hole, the second sliding piece is positioned at the fourth position; when the second slider is located at a connecting line of the third hole and the fourth hole, the second slider is located at the fifth position; when the second slider is located at an end of the fourth hole remote from the third hole, the second slider is located at the sixth position.

As a preferable mode of the seat support structure, an inner wall of a connecting line between the first hole and the second hole is arc-shaped; the inner wall of the third hole and the connecting line of the fourth hole is arc-shaped.

A seat comprises the seat support structure.

The utility model has the advantages that:

the utility model provides a seat support structure and a seat, wherein, a leg component has an extension state and a contraction state, and when the leg component is in the extension state, the leg component can support the legs of a person sitting on the seat; when the leg components are in a contraction state, the legs of a person sitting on the seat are not prevented from naturally drooping. The backrest assembly has a forward leaning state and a backward leaning state, and when the backrest assembly is in the forward leaning state, the backrest assembly can support the back of a person sitting on the seat to stand upright; when the backrest assembly is in a backward leaning state, the back of a person lying on the chair can be supported to lie backwards. The driving structure drives the first sliding part to slide in the leg connecting rod sliding hole, the first sliding part can drive the second sliding part to slide in the backrest connecting rod sliding hole through the connecting rod, the first sliding part slides in the leg connecting rod sliding hole to drive the leg assembly to extend or contract, and the second sliding part slides in the backrest connecting rod sliding hole to drive the backrest assembly to tilt forwards or backwards. The driving structure can drive the first sliding piece to be located at a first position, a second position and a third position in sequence; or driving the first sliding part to be positioned at the third position, the second position and the first position in sequence. When the first sliding piece is positioned at the third position, the second sliding piece is positioned at the sixth position, the leg assembly is in a contracted state, the backrest assembly is in a forward-inclined state, and the seat is in a sitting posture; when the first sliding part is positioned at the second position, the second sliding part is positioned at the fifth position, the leg component is in an extending state, the backrest component is in a forward inclining state, and the seat is in a semi-lying posture; when the first sliding part is located at the first position, the second sliding part is located at the fourth position, the leg component is in an extending state, the backrest component is in a backward leaning state, and the seat is in a full lying posture. The seat support structure can adjust the seat to be converted among three postures, namely a sitting posture, a half lying posture and a full lying posture by using one driving structure, and has the advantages of simple structure and low cost.

Drawings

Fig. 1 is a schematic structural diagram of a seat support structure according to an embodiment of the present invention;

fig. 2 is a schematic structural view of a seat support structure in a sitting posture according to an embodiment of the present invention;

fig. 3 is a schematic structural view of a seat support structure in a semi-reclining position according to an embodiment of the present invention;

fig. 4 is a schematic structural view of a seat support structure in a full-reclined position according to an embodiment of the present invention;

fig. 5 is a schematic structural view of a side plate in a seat support structure according to an embodiment of the present invention.

In the figure:

1. a support structure; 11. a side plate; 111. a leg link sliding hole; 112. a backrest connecting rod sliding hole; 1111. a first hole; 1112. a second hole; 1121. a third aperture; 1122. a fourth aperture; 12. a leg assembly; 121. a first leg link; 122. a second leg link; 123. a third leg link; 124. a fourth leg link; 125. a fifth leg link; 126. a footrest; 127. a first slider; 128. a second slider; 1221. a second protrusion; 1241. a first protrusion; 13. a backrest assembly; 131. a first back link; 132. a second back link; 133. a backrest fixing plate; 14. a connecting rod;

2. a drive structure; 21. a drive member; 22. a first support bar; 23. a second support bar.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, detachably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood as a specific case by those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "right", and the like are used in the orientation or positional relationship shown in the drawings only for convenience of description and simplicity of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.

The utility model provides a seat support structure and a seat, as shown in fig. 1-4, the seat support structure comprises a support structure 1 and a driving structure 2, the support structure 1 comprises a leg component 12, a backrest component 13, a connecting rod 14 and a side plate 11, the side plate 11 is provided with a leg link sliding hole 111 and a backrest link sliding hole 112 at intervals, the leg component 12 comprises a first leg link 121, a first sliding part 127 arranged on the first leg link 121 is slidably arranged on the leg link sliding hole 111, the backrest component 13 comprises a first backrest link 131, a second sliding part 128 arranged on the first backrest link 131 is slidably arranged on the backrest link sliding hole 112, the connecting rod 14 is configured to drive the second sliding part 128 to slide on the backrest link sliding hole 112 when the first sliding part 127 slides on the leg link sliding hole 111, the driving structure can drive the first sliding part 127 to slide on the leg link sliding hole 111, the first slider 127 slides in the leg link sliding hole 111 to have a first position, a second position, and a third position, the second slider 128 slides in the back link sliding hole 112 to have a fourth position, a fifth position, and a sixth position, and when the first slider 127 is located at the first position, the second slider 128 is located at the fourth position; when the first slide 127 is in the second position, the second slide 128 is in the fifth position; when the first slider 127 is located at the third position, the second slider 128 is located at the sixth position; when the first sliding member 127 is located at the first position or the second position, the leg assembly 12 is in an extended state; when the first slide 127 is in the third position, the leg assembly 12 is in a contracted state; when the second sliding member 128 is located at the fourth position, the backrest module 13 is in a reclining state; when the second slide member 128 is located at the fifth position or the sixth position, the backrest module 13 is in the forward tilting state.

The first sliding member 127 may be fixedly disposed on the first leg link 121, or may be rotatably disposed on the first leg link 121. The first slider 127 may be a screw that is threaded with a nut after passing through the first leg link 121 and the leg link sliding hole 111. The first slider 127 may be a rivet or another structure as long as the first slider 127 can slide in the leg link sliding hole 111 while connecting the first leg link 121 and the side plate 11.

The second sliding member 128 may be fixedly disposed on the first backrest connecting rod 131, or may be rotatably disposed on the first backrest connecting rod 131. The second slider 128 may be a screw, and the screw is threaded with a nut after passing through the first back link 131 and the back link sliding hole 112. The second slider 128 may be a rivet or other structure as long as the second slider 128 can be slid in the backrest link sliding hole 112 while connecting the first backrest link 131 and the side plate 11.

In the seat support structure, the leg component 12 has an extended state and a contracted state, and when the leg component 12 is in the extended state, the leg component can support the flat legs of a person sitting on the seat; the leg units 12 are in a contracted state so as not to prevent the legs of a person sitting on the seat from naturally drooping. The backrest assembly 13 has a forward tilting state and a backward tilting state, and when the backrest assembly 13 is in the forward tilting state, the back of a person sitting on the seat can be supported to be upright; when the backrest module 13 is in the reclined state, the back of a person lying on the seat can be supported for reclining. The driving structure 2 drives the first sliding member 127 to slide in the leg link sliding hole 111, the first sliding member 127 can drive the second sliding member 128 to slide in the backrest link sliding hole 112 through the connecting rod 14, the first sliding member 127 can drive the leg assembly 12 to extend or contract when sliding in the leg link sliding hole 111, and the second sliding member 128 can drive the backrest assembly 13 to tilt forward or backward when sliding in the backrest link sliding hole 112. The driving structure 2 can drive the first sliding part 127 to be located at the first position, the second position and the third position in sequence; or to drive the first slider 127 to the third position, the second position, and the first position in this order. When the first slide member 127 is located at the third position, the second slide member 128 is located at the sixth position, and the leg assembly 12 is in the contracted state, the backrest assembly 13 is in the forward-inclined state, and the seat frame structure is in the sitting posture; when the first sliding member 127 is located at the second position, the second sliding member 128 is located at the fifth position, and at this time, the leg assembly 12 is in the extended state, the backrest assembly 13 is in the forward-inclined state, and the seat support structure is in the semi-lying posture; when the first sliding member 127 is located at the first position, the second sliding member 128 is located at the fourth position, and the leg assembly 12 is in the extended state, the backrest assembly 13 is in the reclined state, and the seat frame structure is in the full-lying position. The seat support structure uses one driving structure 2 to adjust the seat to change among three postures of sitting posture, half lying posture and full lying posture, and has simple structure and low cost.

Alternatively, the driving structure 2 drives the second sliding member 128 to slide in the backrest link sliding hole 112, and the second sliding member 128 can drive the first sliding member 127 to slide in the leg link sliding hole 111 through the connecting rod 14.

Optionally, the driving structure 2 includes a driving member 21, a first support rod 22 and a second support rod 23, the housing of the driving member 21 is hinged to the first support rod 22, the output shaft of the driving member 21 is hinged to the second support rod 23, the first support rod 22 is fixedly disposed on the side plate 11, and the second support rod 23 is fixedly disposed on the first leg link 121. The driving member 21 can control the distance between the first support rod 22 and the second support rod 23, and since the first support rod 22 is fixedly disposed on the side plate 11 and the second support rod 23 is fixedly disposed on the first leg link 121, the driving member 21 can drive the first leg link 121 to move relative to the side plate 11, so that the driving member 21 can drive the first sliding member 127 on the first leg link 121 to slide on the leg link sliding hole 111.

Alternatively, the driver 21 is an electric cylinder. When the output shaft of the electric cylinder extends, the distance between the first support rod 22 and the second support rod 23 increases, and the first sliding member 127 slides in the leg link sliding hole 111 and can be located at the third position, the second position, and the first position in sequence; when the output shaft of the electric cylinder is shortened, the distance between the first support rod 22 and the second support rod 23 becomes smaller, and the first slider 127 slides in the leg link sliding hole 111 and can be located at the first position, the second position, and the third position in this order. In other embodiments, the driving member 21 may be a pneumatic or hydraulic cylinder.

Optionally, the number of the support structures 1 is two, the two support structures 1 are arranged at an interval, two ends of the first support rod 22 are respectively and fixedly arranged on the side plates 11 of the two support structures 1, and two ends of the second support rod 23 are respectively and fixedly arranged on the first leg connecting rods 121 of the two support structures 1. The seat support structure can be more stable, and the stability of the seat is improved.

Optionally, the backrest assembly 13 further includes a second backrest connecting rod 132 and a backrest fixing plate 133, the second backrest connecting rod 132 is fixedly disposed at one end of the side plate 11 and is hinged to the backrest fixing plate 133 at the other end, the first backrest connecting rod 131 is hinged to the backrest fixing plate 133 at one end, and the backrest fixing plate 133 is used for mounting the backrest. The first backrest connecting rod 131 can drive the backrest fixing plate 133 to rotate relative to the second backrest connecting rod 132, and the first backrest connecting rod 131 can drive the backrest fixing plate 133 to rotate relative to the side plate 11 because the second backrest connecting rod 132 is fixedly connected with the side plate 11, so that the backrest assembly 13 has a forward tilting state and a backward tilting state.

Optionally, the leg assembly 12 further includes a second leg link 122, a third leg link 123, a fourth leg link 124, a fifth leg link 125 and a footrest 126, one end of the second leg link 122 is hinged to the side plate 11 at a first hinge point, the other end of the second leg link 122 is hinged to the third leg link 123 at a second hinge point, one end of the fourth leg link 124 is hinged to the side plate 11, the other end of the fourth leg link is hinged to the fifth leg link 125, the third leg link 123 and the fifth leg link 125 are both hinged to the footrest 126, the first leg link 121 and the second leg link 122 are hinged to a third hinge point, the third hinge point is located between the first hinge point and the second hinge point, the fourth leg link 124 is provided with a first protrusion 1241, the third leg link 123 is provided with a first slot and a second slot, and when the leg assembly 12 is in the extended state, the first protrusion 1241 is located in the first slot; when the leg assembly 12 is in the contracted state, the first protrusion 1241 is located in the second slot, the second leg link 122 is provided with a second protrusion 1221, and the first leg link 121 can abut against the second protrusion 1221. First leg connecting rod 121 can drive the relative curb plate 11 rotation of second leg connecting rod 122, and second leg connecting rod 122 drives third leg connecting rod 123 motion, and third leg connecting rod 123 drives the relative curb plate 11 rotation of fourth leg connecting rod 124, and fourth leg connecting rod 124 drives fifth leg connecting rod 125 motion, and fifth leg connecting rod 125 and third leg connecting rod 123 drive footrest 126 motion jointly to leg component 12 can extend or contract. When the leg assembly 12 is in the contracted state, the first leg link 121 abuts against the second protrusion 1221 of the second leg link 122 to limit the position of the second leg link 122.

Alternatively, the connecting rod 14 has one end hinged to the first leg link 121 at a fourth hinge point, the other end hinged to the first backrest link 131 at a fifth hinge point, the first backrest link 131 hinged to the backrest fixing plate 133 at a sixth hinge point, the fourth hinge point located between the first slider 127 and the third hinge point, and the fifth hinge point located between the second slider 128 and the sixth hinge point. The first leg link 121 and the first backrest link 131 can be prevented from being too long, the structure of the seat support structure can be simplified, and the first leg link 121 can stably drive the first backrest link 131 to move through the connecting rod 14.

Alternatively, as shown in fig. 5, the leg link sliding hole 111 includes a first hole 1111 and a second hole 1112 that communicate, and when the first slider 127 is located at an end of the first hole 1111 away from the second hole 1112, the first slider 127 is located at a first position; when the first slider 127 is located at the connecting line of the first hole 1111 and the second hole 1112, the first slider 127 is located at the second position; when the first slider 127 is located at an end of the second hole 1112 far from the first hole 1111, the first slider 127 is located at a third position; the backrest link sliding hole 112 includes a third hole 1121 and a fourth hole 1122 which are communicated, and when the second slider 128 is located at an end of the third hole 1121 remote from the fourth hole 1122, the second slider 128 is located at a fourth position; when the second slider 128 is located at a connection line of the third hole 1121 and the fourth hole 1122, the second slider 128 is located at a fifth position; when the second slider 128 is positioned at an end of the fourth aperture 1122 away from the third aperture 1121, the second slider 128 is positioned in a sixth position.

When the first sliding part 127 is located at one end of the first hole 1111 far away from the second hole 1112, the first sliding part 127 abuts against the inner wall of the first hole 1111 to limit the first sliding part 127 at the first position, so that the first sliding part 127 does not move when the output shaft of the electric cylinder continues to extend; when the first sliding part 127 is located at one end of the second hole 1112 far away from the first hole 1111, the first sliding part 127 abuts against the inner wall of the second hole 1112 to limit the first sliding part 127 at the third position, so that the first sliding part 127 does not move when the output shaft of the electric cylinder continues to be shortened.

Optionally, the inner wall at the connecting line of the first hole 1111 and the second hole 1112 is arc-shaped; the inner wall of the third hole 1121 at the connection line with the fourth hole 1122 is curved. The first sliding element 127 can slide into the second hole 1112 from the first hole 1111 or slide into the first hole 1111 from the second hole 1112, and the second sliding element 128 can slide into the fourth hole 1122 from the third hole 1121 or slide into the third hole 1121 from the fourth hole 1122.

The utility model provides a seat includes foretell seat supporting structure.

It is obvious that the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Numerous obvious variations, rearrangements and substitutions will now occur to those skilled in the art without departing from the scope of the invention. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement or improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims (10)

1. A seat support structure, comprising:

a support structure (1), the support structure (1) comprising a leg assembly (12), a backrest assembly (13), a connecting bar (14) and side plates (11), the side plate (11) is provided with a leg connecting rod sliding hole (111) and a backrest connecting rod sliding hole (112) at intervals, the leg component (12) comprises a first leg connecting rod (121), a first sliding piece (127) arranged on the first leg connecting rod (121) is arranged in the leg connecting rod sliding hole (111) in a sliding mode, the backrest component (13) comprises a first backrest connecting rod (131), a second sliding piece (128) arranged on the first backrest connecting rod (131) is arranged in the backrest connecting rod sliding hole (112) in a sliding mode, the connecting rod (14) is configured to drive the second slider (128) to slide in the back link sliding hole (112) when the first slider (127) slides in the leg link sliding hole (111);

a driving structure (2) capable of driving the first slider (127) to slide in the leg link sliding hole (111), the first slider (127) sliding in the leg link sliding hole (111) to have a first position, a second position and a third position, the second slider (128) sliding in the back link sliding hole (112) to have a fourth position, a fifth position and a sixth position, the second slider (128) being located at the fourth position when the first slider (127) is located at the first position; the second slide (128) is in the fifth position when the first slide (127) is in the second position; when the first slide (127) is in the third position, the second slide (128) is in the sixth position;

when the first slide (127) is in the first position or the second position, the leg assemblies (12) are in an extended state; when the first slide (127) is in the third position, the leg assembly (12) is in a contracted state; when the second slider (128) is in the fourth position, the backrest assembly (13) is in a reclined state; when the second sliding piece (128) is located at the fifth position or the sixth position, the backrest assembly (13) is in a forward tilting state.

2. The seat support structure according to claim 1, characterized in that the drive structure (2) comprises a drive member (21), a first support bar (22) and a second support bar (23), the housing of the drive member (21) being hinged to the first support bar (22), the output shaft of the drive member (21) being hinged to the second support bar (23), the first support bar (22) being fixedly arranged to the side plate (11), the second support bar (23) being fixedly arranged to the first leg link (121).

3. The seat support structure according to claim 2, wherein the drive member (21) is an electric cylinder.

4. The seat support structure according to claim 2, wherein the number of the supporting structures (1) is two, the two supporting structures (1) are arranged at intervals, two ends of the first supporting rod (22) are respectively and fixedly arranged on the side plates (11) of the two supporting structures (1), and two ends of the second supporting rod (23) are respectively and fixedly arranged on the first leg connecting rods (121) of the two supporting structures (1).

5. The seat support structure according to any one of claims 1 to 4, wherein the backrest assembly (13) further comprises a second backrest link (132) and a backrest fixing plate (133), the second backrest link (132) is fixedly disposed at one end of the side plate (11) and is hinged to the backrest fixing plate (133) at the other end, the first backrest link (131) is hinged to the backrest fixing plate (133) at one end, and the backrest fixing plate (133) is used for mounting a backrest.

6. The seat support structure according to claim 5, wherein the leg assembly (12) further comprises a second leg link (122), a third leg link (123), a fourth leg link (124), a fifth leg link (125), and a footrest (126), the second leg link (122) being hingedly connected at one end to the side plate (11) at a first hinge point and at the other end to the third leg link (123), the fourth leg link (124) being hingedly connected at one end to the side plate (11) and at the other end to the fifth leg link (125), the third leg link (123) and the fifth leg link (125) each being hingedly connected to the footrest (126), the first leg link (121) being hingedly connected to the second leg link (122) at a third hinge point, the third hinge point being located between the first hinge point and the second hinge point, the fourth leg connecting rod (124) is provided with a first protrusion (1241), the third leg connecting rod (123) is provided with a first clamping groove and a second clamping groove, and when the leg component (12) is in an extended state, the first protrusion (1241) is positioned in the first clamping groove; when the leg assembly (12) is in a contracted state, the first protrusion (1241) is located in the second clamping groove, the second leg connecting rod (122) is provided with a second protrusion (1221), and the first leg connecting rod (121) can be abutted to the second protrusion (1221).

7. The seat support structure according to claim 6, wherein the connecting rod (14) is hinged at one end to the first leg link (121) at a fourth hinge point and at the other end to the first backrest link (131) at a fifth hinge point, the first backrest link (131) being hinged to the backrest fixing plate (133) at a sixth hinge point, the fourth hinge point being located between the first slider (127) and the third hinge point, the fifth hinge point being located between the second slider (128) and the sixth hinge point.

8. The seat support structure according to any one of claims 1 to 4, wherein the leg link sliding hole (111) includes a first hole (1111) and a second hole (1112) communicating, the first slider (127) being located at the first position when the first slider (127) is located at an end of the first hole (1111) remote from the second hole (1112); the first slider (127) is in the second position when the first slider (127) is located at a connecting line of the first hole (1111) and the second hole (1112); when the first slider (127) is located at an end of the second hole (1112) remote from the first hole (1111), the first slider (127) is located at the third position;

the backrest link sliding hole (112) comprises a third hole (1121) and a fourth hole (1122) which are communicated, and when the second slider (128) is positioned at one end of the third hole (1121) far away from the fourth hole (1122), the second slider (128) is positioned at the fourth position; -when the second slider (128) is located at the connection line of the third hole (1121) and the fourth hole (1122), the second slider (128) is located in the fifth position; when the second slider (128) is located at an end of the fourth hole (1122) remote from the third hole (1121), the second slider (128) is located at the sixth position.

9. The seat support structure of claim 8, wherein an inner wall at a connection line of the first hole (1111) and the second hole (1112) is curved; the inner wall of the third hole (1121) at the connecting line with the fourth hole (1122) is arc-shaped.

10. A seat comprising a seat support structure as claimed in any one of claims 1 to 9.

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