阅读说明：本技术 一种座椅腿部斜收装置、座椅支架及座椅单元 (Seat leg oblique-retracting device, seat support and seat unit ) 是由 李晓鸿 张小强 吕战征 李元坤 于 2021-08-18 设计创作，主要内容包括：本发明涉及一种座椅腿部斜收装置、座椅支架及座椅单元,包括铰接在座框安装架前端的腿部组件,座框安装架的内侧设置有安装平台,安装平台的高度低于座框安装架的上边缘,安装平台的所在平面为座框安装面；腿部组件的搁脚驱动杆和搁脚连动杆分别与座框安装架的前端铰接,第一搁脚连杆一端与搁脚驱动杆铰接,另一端与搁脚件的端部铰接,第二搁脚连杆一端与搁脚连动杆铰接,另一端与搁脚件的中部铰接；搁脚件包括用于安装搁脚板的搁脚板安装面,当腿部组件收缩至极限位置时,搁脚板安装面收缩至座框安装面下方,且相对水平面倾斜。本发明座椅正面软包后看上去厚度更薄,增加了底部空间,且可以用于高支脚的座椅款式。(The invention relates to a seat leg oblique-receiving device, a seat support and a seat unit, which comprise a leg component hinged at the front end of a seat frame mounting rack, wherein the inner side of the seat frame mounting rack is provided with a mounting platform, the height of the mounting platform is lower than the upper edge of the seat frame mounting rack, and the plane of the mounting platform is a seat frame mounting surface; a leg rest driving rod and a leg rest linkage rod of the leg component are respectively hinged with the front end of the seat frame mounting rack, one end of a first leg rest connecting rod is hinged with the leg rest driving rod, the other end of the first leg rest connecting rod is hinged with the end part of the leg rest piece, one end of a second leg rest connecting rod is hinged with the leg rest linkage rod, and the other end of the second leg rest connecting rod is hinged with the middle part of the leg rest piece; the footrest member includes a footrest mounting surface for mounting the footrest, and the footrest mounting surface is retracted below the seat frame mounting surface and inclined with respect to the horizontal plane when the leg assembly is retracted to the extreme position. The front surface of the seat is soft-packed, so that the thickness of the seat is thinner, the bottom space is increased, and the seat can be used for a high-leg seat style.)

1. The seat leg oblique-receiving device is characterized by comprising a leg component (2) hinged to the front end of a seat frame mounting frame (1);

the leg component (2) comprises a leg rest driving rod (21), a leg rest linkage rod (22), a first leg rest connecting rod (23), a second leg rest connecting rod (24) and a leg rest piece (25), the leg rest driving rod (21) and the leg rest linkage rod (22) are respectively hinged with the front end of the seat frame mounting rack (1), one end of the first leg rest connecting rod (23) is hinged with the leg rest driving rod (21), the other end of the first leg rest connecting rod is hinged with the end part of the leg rest piece (25), one end of the second leg rest connecting rod (24) is hinged with the leg rest linkage rod (22), and the other end of the second leg rest connecting rod is hinged with the middle part of the leg rest piece (25);

the footrest (25) comprises a footrest mounting surface (251) for mounting a footrest (6), the footrest mounting surface (251) being retractable below the seat frame mounting (1) and inclined to the horizontal when the leg assembly (2) is retracted to the extreme position.

2. A seat leg recline according to claim 1, wherein said footrest mounting surface (251) is angled at between 20 ° and 26 ° to the horizontal when said leg assembly (2) is retracted to the extreme position.

3. A seat leg recline according to claim 1, wherein the distance of the point of connection of said second footrest link (24) to said foot rest (25) to said footrest mounting surface (251) is less than the distance of the point of connection of said first footrest link (23) to said foot rest (25) to said footrest mounting surface (251).

4. A seat leg recline according to claim 1, wherein said first leg rest link (23) is provided with a stop (231) near one end of said leg rest (25).

5. The seat leg reclining device according to claim 4, wherein the second leg rest link (24) is provided with a first limiting surface (241) engaged with the limiting member (231), and when the first limiting surface (241) interferes with the limiting member (231), the current position of the leg assembly (2) is the extreme position of the leg assembly (2) extending.

6. The seat leg reclining device according to claim 5, wherein a second limiting surface (252) is disposed on a lower edge of the leg rest (25) and is engaged with the limiting member (231), and when the second limiting surface (252) interferes with the limiting member (231), the current position of the leg assembly (2) is a limit position of the leg assembly (2) being retracted.

7. A seat support, characterized by comprising a seat frame mounting frame (1), a seat linkage assembly (3), a driving connecting piece (9) and the leg reclining device of any one of claims 1 to 6, wherein the seat linkage assembly (3) is rotatably connected below the seat frame mounting frame (1), and the driving connecting piece (9) is connected with the seat linkage assembly (3);

an installation platform (11) is arranged on the inner side of the seat frame installation frame (1), the height of the installation platform (11) is lower than the upper edge of the seat frame installation frame (1), and the plane where the installation platform (11) is located is a seat frame installation surface (111);

when the seat support is contracted to the limit position, the distance H1 between the highest point of the seat frame mounting rack (1) on the seat frame mounting surface (111) and the lowest point of the driving connecting piece (9) in the vertical direction is not more than 270 mm.

8. A seat support according to claim 7, wherein the distance H2 between the highest point of the seat frame mounting surface (111) and the highest point of the footrest mounting surface (251) in the vertical direction when the seat support is retracted to the extreme position is no more than 50 mm.

9. A seat support according to claim 7, wherein the seat linkage assembly (3) comprises a leg link (31), the seat linkage assembly (3) being connected to the leg assembly (2) by the leg link (31).

10. A seat support according to claim 9, wherein said seat linkage assembly (3) further comprises a seat frame linkage assembly (32), said seat frame linkage assembly (32) comprising a first linking rod (321), an intermediate linking rod (322) and a second linking rod (323) hinged in sequence;

first connecting rod (321) and second link frame pole (323) respectively with seat frame mounting bracket (1) is articulated, first connecting rod (321), middle gangbar (322), second link frame pole (323) and seat frame mounting bracket (1) forms quadrangle link mechanism, middle gangbar (322) with even leg rod (31) are articulated.

11. A seat support according to claim 10, wherein the seat linkage assembly (3) further comprises a side plate linkage assembly (33), the side plate linkage assembly (33) comprising a mounting side plate (331) and a translating link assembly (332), the translating link assembly (332) being hinged between the seat frame linkage assembly (32) and the mounting side plate (331).

12. A seat support according to claim 11, wherein said translating link assembly (332) comprises a first connecting rod (333), a second connecting rod (334), a first rocker (335), a first intermediate rod (336), a second intermediate rod (337), and a second rocker (338);

one end of the first connecting rod (333) is hinged with the first rocker (335), the other end of the first connecting rod is hinged with the middle linkage rod (322), one end of the second connecting rod (334) is hinged with the second rocker (338), and the other end of the second connecting rod is hinged with the middle linkage rod (322);

the first rocker (335) and the second rocker (338) are respectively hinged at the front end and the middle part of the mounting side plate (331), and the first middle rod (336) and the second middle rod (337) are hinged between the first rocker (335) and the second rocker (338).

13. The seat support according to claim 7, further comprising a backrest assembly (8), the backrest assembly (8) comprising a backrest mount (81), a seat frame connection (82), a backrest connection (83) and a backrest stop (84);

the middle of the seat frame connecting part (82) is fixedly connected with the seat frame mounting frame (1), two ends of the seat frame connecting part (82) are respectively hinged with the backrest mounting part (81) and the backrest limiting part (84), one end of the backrest connecting part (83) is hinged with the middle of the backrest mounting part (81), the other end of the backrest connecting part is hinged with the backrest limiting part (84), and the backrest limiting part (84) is hinged with the rear end of the mounting side plate (331) through a connecting rod (85);

when the seat frame connecting part (82) and the seat frame mounting rack (1) move forwards and upwards in an inclined mode, the backrest limiting part (84) and the backrest connecting part (83) drive the backrest mounting part (81) to rotate backwards.

14. A seat unit comprising a seat support (10) according to any of claims 7 to 13 and a drive assembly, the seat support (10) being in two sets and arranged in opposition, the drive assembly comprising a drive crossbar disposed between the opposed leg assemblies and a fixed crossbar connected between the opposed mounting side plates (331) by a drive connection (9) for connection with a push rod of a drive source, the drive crossbar driving the seat support (10) between a sitting position and a recumbent position.

15. A seating unit according to claim 14, further comprising a seat frame (4) and two armrest frames (5);

the two seat supports (10) are respectively fixedly connected with the inner side surfaces of the two armrest frames (5), and the seat frame (4) is arranged between the two seat frame mounting frames (1) through the mounting platform (11).

16. The seat unit according to claim 14, further comprising a footrest (6), the footrest (6) being fixedly connected with the footrest mounting surface (251), the footrest (6) having a length L not less than 200 mm.

17. A seat unit according to claim 15, further comprising a seat foot (7), said seat foot (7) being arranged below said armrest frame (5), the height of said seat foot (7) being 120-150 mm.

Technical Field

The invention relates to the technical field of sofa supports, in particular to a seat leg oblique-folding device, a seat support and a seat unit.

Background

With the improvement of living standard of people, functional sofas and seats are more and more common in life. Functional seats include recliners, arm chairs, sofas, combination seats, cinema seats, and seating units with moving seats. The functional seat with the telescopic device can be adjusted among the positions of sitting posture, leisure posture and lying posture through the telescopic device.

The existing seat unit has the following defects: when the chair is designed to be a chair with high legs and low seat height, the leg rest piece of the leg component is easy to rub against the ground, so that the use of a user is influenced; the bottom space of the seat frame is narrow and difficult to clean; in the position of the contracted sitting posture, the footrest of the leg component is contracted in front of the seat, so that the front part of the seat is thick and heavy, the attractiveness is poor, and the lower leg cannot be obliquely placed below the seat in the sitting posture. Therefore, there is a need in the art to provide a seat support structure for a high-leg seat, which has a thinner front thickness and a larger space below the seat frame, and satisfies the style of the high-leg seat.

Disclosure of Invention

In view of the above problems of the prior art, it is an object of the present invention to provide a seat leg reclining mechanism, a seat support and a seat unit, which can make the vertical height of the front of the seat reduced and look thinner after being contracted by adjusting the structures of a seat frame mounting bracket and a leg assembly, and at the same time, the bottom space of the seat frame is increased, making it possible to increase the height of legs and facilitate the bottom cleaning.

In order to solve the above problems, the present invention provides a seat leg reclining mechanism, including a leg assembly hinged to a front end of a seat frame mounting bracket;

the leg component comprises a leg rest driving rod, a leg rest linkage rod, a first leg rest connecting rod, a second leg rest connecting rod and a leg rest piece, the leg rest driving rod and the leg rest linkage rod are respectively hinged with the front end of the seat frame mounting rack, one end of the first leg rest connecting rod is hinged with the leg rest driving rod, the other end of the first leg rest connecting rod is hinged with the end part of the leg rest piece, one end of the second leg rest connecting rod is hinged with the leg rest linkage rod, and the other end of the second leg rest connecting rod is hinged with the middle part of the leg rest piece;

the footrest member includes a footrest mounting surface for mounting a footrest, and when the leg assembly is retracted to the extreme position, the footrest mounting surface is retracted to below the seat frame mounting bracket and inclined with respect to the horizontal plane.

Further, when the leg assembly is retracted to the extreme position, the footrest mounting surface is angled from 20 ° to 26 ° from horizontal.

Further, the distance from the connecting point of the second footrest connecting rod and the footrest piece to the footrest mounting surface is smaller than the distance from the connecting point of the first footrest connecting rod and the footrest piece to the footrest mounting surface.

Furthermore, one end of the first leg rest connecting rod, which is close to the leg rest piece, is provided with a limiting piece.

Furthermore, a first limiting surface matched with the limiting part is arranged on the second leg rest connecting rod, and when the first limiting surface is abutted against the limiting part, the current position of the leg component is the limit position of the extension of the leg component.

Furthermore, be provided with on the lower limb of footrest spare with spacing face of locating part matched with second, when spacing face of second with when the locating part is contradicted, the current position of shank subassembly is the extreme position that the shank subassembly contracts.

The invention also provides a seat support, which comprises a seat frame installation frame, a seat part linkage assembly, a driving connecting piece and the leg part inclined receiving device, wherein the seat part linkage assembly is rotatably connected below the seat frame installation frame; the inner side of the seat frame mounting rack is provided with a mounting platform, the height of the mounting platform is lower than the upper edge of the seat frame mounting rack, and the plane where the mounting platform is located is a seat frame mounting surface;

the distance H1 between the highest point of the seat frame mounting surface and the lowest point of the drive link in the vertical direction when the seat support is retracted to the extreme position is not more than 270 mm.

Further, when the seat support is contracted to the limit position, the distance H2 between the highest point of the seat frame installation surface and the highest point of the footrest installation surface in the vertical direction is not more than 50 mm.

Further, the seat linkage assembly includes a leg link rod through which the seat linkage assembly is connected with the leg assembly.

Furthermore, the seat linkage assembly also comprises a seat frame linkage assembly, and the seat frame linkage assembly comprises a first connecting frame rod, a middle linkage rod and a second connecting frame rod which are sequentially hinged;

first frame pole and second link frame pole respectively with the seat frame mounting bracket is articulated, first frame pole, middle gangbar, second link frame pole and the seat frame mounting bracket forms quadrangle link mechanism, middle gangbar with it is articulated to link the leg pole.

Further, the seat linkage assembly further comprises a side plate linkage assembly, the side plate linkage assembly comprises a mounting side plate and a translation connecting rod assembly, and the translation connecting rod assembly is hinged between the seat frame linkage assembly and the mounting side plate.

Further, the translation connecting rod assembly comprises a first connecting rod, a second connecting rod, a first rocker, a first middle rod, a second middle rod and a second rocker;

one end of the first connecting rod is hinged with the first rocker, the other end of the first connecting rod is hinged with the middle linkage rod, one end of the second connecting rod is hinged with the second rocker, and the other end of the second connecting rod is hinged with the middle linkage rod;

the first rocker and the second rocker are hinged to the front end and the middle of the mounting side plate respectively, and the first middle rod and the second middle rod are hinged between the first rocker and the second rocker.

The backrest assembly comprises a backrest mounting piece, a seat frame connecting part, a backrest connecting piece and a backrest limiting piece;

the middle part of the seat frame connecting part is fixedly connected with the seat frame mounting frame, two ends of the seat frame connecting part are respectively hinged with the backrest mounting part and the backrest limiting part, one end of the backrest connecting part is hinged with the middle part of the backrest mounting part, the other end of the backrest connecting part is hinged with the backrest limiting part, and the backrest limiting part is hinged with the rear end of the mounting side plate through a connecting rod;

when the seat frame connecting part and the seat frame mounting rack move forwards and upwards in an inclined mode, the backrest limiting part and the backrest connecting piece drive the backrest mounting part to rotate backwards.

The invention also provides a seat unit which comprises two groups of seat supports and a driving assembly, wherein the two groups of seat supports are oppositely arranged, the driving assembly comprises a driving cross rod and a fixed cross rod, the driving cross rod is arranged between the two opposite leg assemblies, the fixed cross rod is connected between the two opposite installation side plates through a fixing piece, the driving cross rod is used for being connected with a push rod of a driving source, and the driving cross rod drives the seat supports to move between a sitting posture position and a lying posture position.

Further, the seat frame and the two armrest frames are also included; the two seat supports are respectively and fixedly connected with the inner side surfaces of the two armrest frames, and the seat frame is arranged between the two seat frame mounting frames through the mounting platform.

Further, the shoe plate comprises a shoe plate, wherein the shoe plate is fixedly connected with the mounting surface of the shoe plate, and the length L of the shoe plate is not less than 200 mm.

Further, the seat support leg is further included, the seat support leg is arranged below the armrest frame, and the height of the seat support leg is 120mm and 150 mm.

Due to the technical scheme, the invention has the following beneficial effects:

the seat frame mounting platform is arranged at the lower edge of the inner wall of the seat frame mounting rack, so that the seat frame can be installed between the seat frame mounting racks on the two sides in a sinking mode, and the seat depth is increased.

The leg component has simple and compact structure, the leg rest component can be completely and obliquely received at the bottom of the seat frame, and the seat frame is combined with the sinking and leg rest component in an oblique manner, so that the seat frame and the leg component have smaller size in the vertical direction in a sitting posture state, the seat part is seen to be thinner in the front side, the bottom space of the seat frame is increased, and the cleaning is convenient.

The seat support provided by the invention has the advantages that the vertical height of the seat frame mounting frame and the leg component is compressed after the seat support is contracted, the occupied space after the seat support is contracted is reduced as much as possible, and the seat support can be used for a seat style with high support legs and low seat height.

Drawings

In order to more clearly illustrate the technical solution of the present invention, the drawings used in the description of the embodiment or the prior art will be briefly described below. It is obvious that the drawings in the following description are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.

FIG. 1 is a schematic view of a seat support according to an embodiment of the present invention;

FIG. 2 is a schematic view of an extended position of a seat support according to an embodiment of the present invention;

FIG. 3 is a schematic view of a reclining position structure of a seat support according to an embodiment of the present invention;

FIG. 4 is a schematic structural view of a side plate linkage assembly in accordance with an embodiment of the present invention;

FIG. 5 is a schematic view of the seat support of an embodiment of the present invention during extension;

FIG. 6 is a front view of a seating unit of an embodiment of the present invention;

fig. 7 is a side view of a seating unit in accordance with an embodiment of the present invention.

Wherein the reference numerals are: 10-a seat support, 1-a seat frame mounting, 11-a mounting platform, 111-a seat frame mounting surface, 2-a leg component, 21-a leg rest driving rod, 22-a leg rest linkage rod, 23-a first leg rest linkage rod, 231-a limiting member, 24-a second leg rest linkage rod, 241-a first limiting surface, 25-a leg rest component, 251-a leg rest mounting surface, 252-a second limiting surface, 3-a seat part linkage component, 31-a leg linkage rod, 32-a seat frame linkage component, 321-a first linkage rod, 322-an intermediate linkage rod, 323-a second linkage rod, 33-a side plate linkage component, 331-a mounting side plate, 332-a translational linkage component, 333-a first connecting rod, 334-a second connecting rod, 335-a first rocking rod, 336-a first intermediate rod, 337-second intermediate bar, 338-second rocker, 4-seat frame, 5-armrest frame, 6-footrest, 7-seat foot, 8-backrest module, 81-backrest mount, 82-seat frame connection, 83-backrest connection, 84-backrest limit, 85-connecting rod, 9-drive connection.

Detailed Description

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, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.

Reference herein to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic may be included in at least one implementation of the invention. In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", and the like indicate orientations or positional relationships based on those shown in the drawings, and are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element 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", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. Moreover, the terms "first," "second," and the like are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein.

In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and the like are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

Examples

The seat can be adjusted among a sitting posture, an extending posture and a lying posture position, the seat is adjusted from the sitting posture to the extending posture to be a first adjusting stage, and the seat is adjusted from the extending posture to the lying posture to be a second adjusting stage. In a first adjustment phase, the seat back angle is kept basically constant, and the leg assembly is extended forwards to an extreme position; during the second adjusting stage, the leg component and the seat frame integrally move upwards in an inclined mode, the seat backrest rotates backwards, and the angle between the backrest and the seat frame is increased until the final lying posture position is adjusted.

As shown in fig. 1 and 2, the present embodiment provides a leg reclining device for a seat, including a leg assembly 2 hinged to the front end of a seat frame mounting frame 1, where the leg assembly 2 includes a leg rest driving rod 21, a leg rest linkage 22, a first leg rest connecting rod 23, a second leg rest connecting rod 24 and a leg rest piece 25, the leg rest driving rod 21 and the leg rest linkage 22 are respectively hinged to the front end of the seat frame mounting frame 1, one end of the first leg rest connecting rod 23 is hinged to the leg rest driving rod 21, the other end is hinged to the end of the leg rest piece 25, one end of the second leg rest connecting rod 24 is hinged to the leg rest linkage 22, and the other end is hinged to the middle of the leg rest piece 25;

the foot rest 25 comprises a footrest mounting surface 251 for mounting the footrest 6, the footrest mounting surface 251 being retracted below the frame mounting bracket 1 and inclined to the horizontal when the leg assembly 2 is retracted to the extreme position. Specifically, when leg assembly 2 is retracted to the extreme position, footrest mounting surface 251 is angled from 20 ° to 26 ° from horizontal. Preferably, it may be 20 °, 23 °, 25 ° or 26 °. The distance from the connecting point of the second footrest link 24 and the footrest member 25 to the footrest mounting surface 251 is smaller than the distance from the connecting point of the first footrest link 23 and the footrest member 25 to the footrest mounting surface 251, so that the footrest member 22 is inclined with respect to the horizontal plane after being contracted, and the space occupied in the vertical direction of the leg-reclining device is reduced.

Specifically, one end of the first leg rest link 23 close to the leg rest 25 is provided with a stopper 231. The second leg rest link 24 is provided with a first limiting surface 241 matched with the limiting member 231, and when the first limiting surface 241 abuts against the limiting member 231, the current position of the leg assembly 2 is the limit position of the leg assembly 2. A second limiting surface 252 matched with the limiting member 231 is arranged on the lower edge of the leg rest 25, and when the second limiting surface 252 abuts against the limiting member 231, the current position of the leg assembly 2 is the limit position of the leg assembly 2 in the contraction process.

Specifically, the limiting member 231 is engaged with the first limiting surface 241 or the second limiting surface 252 to limit and prevent the leg rest from being released. On one hand, the leg component can be limited to prevent the leg component from being excessively extended or contracted, so that the leg component cannot be successfully retracted or expanded; on the other hand, the foot rest and the foot rest can be prevented from being easily loosened without being retracted to the predetermined limit position.

Put foot spare and receive seat frame mounting bracket below completely to one side, compare in conventional withdrawal back foot rest spare vertically leg structure, this application finished product seat openly is more frivolous. The vertical height compression of shrink back seat frame mounting bracket 1 and shank subassembly 2 has reduced the space that occupies after the shrink as far as possible, promotes space utilization to make seat dress back seat frame lower part space increase, can make things convenient for cleaning device such as mop, the robot of sweeping the floor to clean, can also inwards receive the shank to one side during on the other hand position of sitting and place, increase more positions of sitting and experience.

The embodiment also provides a seat support, which comprises a seat frame mounting frame 1, a seat part linkage assembly 3, a driving connecting piece 9 and a leg part inclining and accommodating device, wherein the seat part linkage assembly 3 is rotatably connected below the seat frame mounting frame 1, and the driving connecting piece 9 is connected with the seat part linkage assembly 3; the inner side of the seat frame mounting frame 1 is provided with a mounting platform 11, the height of the mounting platform 11 is lower than the upper edge of the seat frame mounting frame 1, and the plane of the mounting platform 11 is a seat frame mounting surface 111; as shown in fig. 1, the distance H1 in the vertical direction between the highest point of the seat frame mount 1 on the seat frame mounting surface 111 and the lowest point of the drive link 9 when the seat bracket is retracted to the extreme position is not more than 270mm, and preferably may be 270mm, 260mm, 250mm, 230mm, 220mm or 200 mm.

It should be noted that, a plurality of mounting platforms 11 may be provided, in this embodiment, the mounting platforms 11 are disposed at the lower edge of the seat frame mounting bracket 1, four mounting platforms 11 are disposed along the length direction of the seat frame mounting bracket 1, and the seat frame may be fixedly mounted on the mounting platforms 11 by fasteners such as bolts, nuts, or rivets. This application mounting platform 11 high reduction for the seat frame can sink the installation, increases the seat deeply, and is highly unchangeable at the seat, under the condition that seat frame installation face reduces, can also make the high increase of seat stabilizer blade, and seat frame lower part space strengthens, and on the other hand also can make the soft packet of thickness of seat cushion increase, improve the comfort level.

Specifically, when the seat bracket 10 is retracted to the extreme position, the distance H1 in the vertical direction between the highest point of the seat frame mount 1 on the seat frame mount surface 111 and the highest point of the footrest mount surface 251 is not more than 50 mm. Preferably, the distance H2 between the highest point of the seat frame mounting bracket 1 on the seat frame mounting surface 111 and the highest point of the footrest mounting surface 251 in the vertical direction may be 50mm, 45mm, or 40 mm. The smaller the distance H2, the smaller the thickness of the seat portion as viewed from the front of the seat after the leg assembly has been retracted.

Specifically, the seat portion linkage assembly 3 of the present embodiment includes a leg connecting rod 31, and the seat portion linkage assembly 3 is connected to the leg portion assembly 2 through the leg connecting rod 31.

Specifically, as shown in fig. 3, the seat linkage assembly 3 further includes a seat frame linkage assembly 32, and the seat frame linkage assembly 32 includes a first connecting frame rod 321, an intermediate linkage rod 322 and a second connecting frame rod 323 which are sequentially hinged; the first connecting frame rod 321 and the second connecting frame rod 323 are respectively hinged with the seat frame mounting rack 1, the first connecting frame rod 321, the middle linkage rod 322, the second connecting frame rod 323 and the seat frame mounting rack 1 form a parallelogram link mechanism, and the middle linkage rod 322 is hinged with the leg connecting rod 31. In this embodiment, during the first adjustment phase, the intermediate linkage rod 322 remains stationary and the seat frame mounting bracket 1 translates forward with the leg assembly 2 extended by rotation of the first and second linkage rods 321, 323 until the leg assembly 2 is fully extended.

Specifically, as shown in fig. 4, the seat linkage assembly 3 further includes a side plate linkage assembly 33, the side plate linkage assembly 33 includes a mounting side plate 331 and a translating link assembly 332, and the translating link assembly 332 is hinged between the seat frame linkage assembly 32 and the mounting side plate 331. During a second adjustment phase, the bezel linkage assembly 32 translates obliquely forward and upward by movement of the translating link assembly 332.

Specifically, the translating linkage assembly 332 includes a first connecting rod 333, a second connecting rod 334, a first rocker 335, a first intermediate rod 336, a second intermediate rod 337, and a second rocker 338; one end of the first connecting rod 333 is hinged with the first rocker 335, the other end is hinged with the middle linkage rod 322, one end of the second connecting rod 334 is hinged with the second rocker 338, and the other end is hinged with the middle linkage rod 322; the first and second rocking bars 335 and 338 are hinged at front and middle portions of the mounting side plate 331, respectively, and the first and second intermediate levers 336 and 337 are hinged between the first and second rocking bars 335 and 338.

Specifically, the backrest assembly 8 is further included, the backrest assembly 8 is rotatably connected to one end, away from the leg assembly 2, of the seat frame mounting frame 1, and the backrest assembly 8 is used for being connected with a seat backrest frame to adjust the backrest angle of the seat. The backrest module 8 includes a backrest mounting member 81, a seat frame connecting portion 82, a backrest connecting member 83, and a backrest limiting member 84; the middle part of the seat frame connecting part 82 is fixedly connected with the seat frame mounting rack 1, two ends of the seat frame connecting part 82 are respectively hinged with the backrest mounting part 81 and the backrest limiting part 84, one end of the backrest connecting part 83 is hinged with the middle part of the backrest mounting part 81, the other end of the backrest connecting part is hinged with the backrest limiting part 84, and the backrest limiting part 84 is hinged with the rear end of the mounting side plate 331 through a connecting rod 85; when the seat frame connecting portion 82 moves up with the seat frame mounting bracket 1, the backrest limiting member 84 and the backrest connecting member 83 drive the backrest mounting member 81 to rotate backward.

In this embodiment, in the first adjustment stage, the leg assembly 2 extends forward to drive the seat frame mounting frame 1 to move forward, the middle linkage rod 322 is not moved, and the first linking rod 321 and the second linking rod 323 rotate forward, and at this time, the angle between the seat frame and the backrest remains unchanged; in the second adjustment stage, the leg assembly 2, the seat frame mounting bracket 1 and the seat frame linkage assembly 32 are moved obliquely forward and upward as a whole, and the seat back is rotated rearward to adjust the angle between the back and the seat frame.

As shown in fig. 6 and 7, the present embodiment further provides a seat unit, which includes a driving assembly and a seat support 10, the seat support 10 is provided in two sets and arranged oppositely, the driving assembly includes a driving cross bar and a fixing cross bar, the driving cross bar is arranged between two opposite leg assemblies, the fixing cross bar is connected between two opposite mounting side plates 331 through a driving connecting piece 9, the driving cross bar is used for being connected with a push rod of a driving source, and the driving cross bar drives the seat support 10 to move between a sitting posture position and a lying posture position.

Specifically, the driving assembly drives the leg assembly to extend through the driving cross rod so as to drive the seat frame mounting frame, the seat linkage assembly 3 and the backrest assembly 8 to move, under the driving of the driving assembly, the seat unit can realize three position postures of a sitting posture position, an extending position and a lying posture position, and the leg assembly and the backrest assembly are retracted to the limit positions in the sitting posture position; when the chair is in the stretching position, the leg component extends forwards to the limit position, and the included angle between the backrest component and the seat frame is kept to be the same as the sitting position; when the user lies down, the leg stretching assembly extends to the limit position, and the backrest assembly rotates backwards to the limit position.

Specifically, the seat frame 4 and the two armrest frames 5 are also included; the two seat supports 10 are respectively fixedly connected with the inner side surfaces of the two armrest frames 5, and the seat frame 4 is arranged between the two seat frame mounting frames 1 through the mounting platform 11. Specifically, two seat support mirror images and looks interval setting to fix on handrail frame 5 through the installation curb plate, seat frame 4 is sunken to be installed on mounting platform, and mounting platform's height is less than the top edge of seat frame mounting bracket.

Specifically, as shown in fig. 5, the shoe support device further comprises a shoe support 6, wherein the shoe support 6 is connected with the shoe support mounting surface 251 through a fastener, and the length L of the shoe support 6 is not less than 200 mm. Since the leg rest of this embodiment can be received obliquely below the leg assembly 2, a longer leg rest 6 can be installed. Preferably, the length L of the footrest 6 can be 200mm, 250mm, 260mm or 280mm, on the basis that the footrest does not interfere with the ground during the telescoping of the leg assembly.

Specifically, a seat leg 7 is further included, the seat leg 7 is disposed below the armrest frame 5, and the height of the seat leg 7 is 120mm and 150 mm. Preferably, the height of the seat foot may be 120mm, 130mm or 150 mm. Compare the seat unit that uses traditional seat support, the height of this embodiment seat stabilizer blade is higher, and traditional seat support is because of the structure is complicated, and occupation space is great, and the seat stabilizer blade is only about 5mm, and the seat below is difficult clean.

The seat frame mounting platform of this application seat unit sets up the lower limb at seat frame mounting bracket inner wall for the seat frame can sink between the installation both sides seat frame mounting bracket, and the seat increases deeply. Leg assembly simple structure, compactness, leg supporter can receive seat frame bottom to one side completely, and seat frame and leg assembly are littleer at the seat front end in vertical direction size when making the position of sitting state, and soft package back thickness is thinner, has increased seat frame bottom space, makes the clearance of being convenient for. The vertical height compression of this application seat support shrink back seat frame mounting bracket and shank subassembly has reduced the space that occupies after the shrink as far as possible, satisfies the seat style requirement of the low seat height of high stabilizer blade.

In this application, the opposite side between two opposite seat supports, i.e., the two frame mounts, is the "inboard" side, and the opposite direction is the "outboard" side. The leg assembly extends in a direction "forward" and in a direction opposite thereto in a direction "rearward".

The foregoing description has disclosed fully preferred embodiments of the present invention. It should be noted that those skilled in the art can make modifications to the embodiments of the present invention without departing from the scope of the appended claims. Accordingly, the scope of the appended claims is not to be limited to the specific embodiments described above.