Seat support and seat comprising same

Abstract

A seat support and a seat comprising same. The seat support comprises: a base (10), a linkage mechanism (20), and a footrest driving assembly (30); the linkage mechanism (20) comprises a footrest assembly (21) and a linkage assembly (22), wherein the footrest assembly (21) comprises a first footrest plate group (211), a second footrest plate group (212) and a footrest (213), the first footrest plate group (211) and the second footrest plate group (212) are rotatably connected to the footrest (213), the footrest plate group (211) and the second footrest plate group (212) are rotatably connected to the linkage assembly (22), and the linkage assembly (22) is rotatably connected to the base (10); the footrest driving assembly (30) comprises a driving connection rod (311), a footrest driving plate (312) and a footrest lifting plate (32), wherein the driving connection rod (311) is rotatably connected to the base (10), the driving connection rod (311) is rotatably connected to the footrest driving plate (312), the footrest driving plate (312) is rotatably connected to the linkage assembly (22), the footrest lifting plate (32) is rotatably connected to the footrest driving plate (312), and the footrest lifting plate (32) is rotatably connected to the first footrest plate group (211) or the second footrest plate group (212); the footrest assembly (21) has a retracted position and a stretched position, and when the footrest assembly (21) is located at the retracted position, the footrest (213) is retracted to a position below the linkage assembly (22). The problem of difficulties in clearing a position below the seat is solved.

Description

Seat bracket and seat having the same

[0001] This application claims priority to a patent application filed with the State Intellectual Property Office of China on December 21, 2023, with application number 2023235183958 and invention name “Seat bracket and seat having the same”. Technical Field

[0002] The present application relates to the technical field of furniture, and in particular to a chair bracket and a chair having the same. Background Art

[0003] As people's living standards improve, functional sofas and chairs are becoming increasingly common. Seats generally offer three sitting positions: reclining, TV position, and sitting. A seat consists of legs, a seat, and a backrest. In the sitting position, the legs are not extended, the seat is horizontal, and the backrest is nearly upright. In the TV position, also known as the television position, the legs extend forward, while the backrest remains essentially unchanged. In the reclining position, the backrest tilts back, while the legs remain essentially unchanged, providing a comfortable rest.

[0004] However, when the legs of the existing seats are not opened, the leg footrests can only be retracted to a vertical state and blocked in front of the bottom of the seat, making the bottom of the seat difficult to clean. Summary of the Invention

[0005] The present application provides a seat bracket and a seat having the same, so as to solve the problem in the related art that the bottom of the seat is not easy to be cleaned.

[0006] According to one aspect of the present application, a seat bracket is provided, which includes: a base; a linkage mechanism, including a footrest assembly and a linkage assembly, the footrest assembly including a first footrest plate group, a second footrest plate group and a footrest, the front of the first footrest plate group and the front of the second footrest plate group are rotatably connected to the front end and rear end of the footrest respectively, the middle of the first footrest plate group and the middle of the second footrest plate group are rotatably connected, the rear end of the first footrest plate group and the rear end of the second footrest plate group are both rotatably connected to the linkage assembly, and the linkage assembly is rotatably connected to the base; a footrest drive assembly, including a drive connecting rod, a footrest drive plate and a footrest lifting plate, the upper end of the drive connecting rod is connected to the base The footrest assembly is rotatably connected, the lower end of the driving connecting rod is rotatably connected to the lower end of the footrest driving plate, the upper end of the footrest driving plate is rotatably connected to the linkage assembly, the rear end of the footrest lifting plate is rotatably connected to the middle part of the footrest driving plate, and the front end of the footrest lifting plate is rotatably connected to the first footrest plate group or the second footrest plate group; wherein, the footrest assembly has a retracted position in which the first footrest plate group and the second footrest plate group are relatively retracted and an extended position in which the first footrest plate group and the second footrest plate group are relatively opened, and the footrest driving assembly can drive the footrest assembly to switch between the retracted position and the extended position. When the footrest assembly is in the retracted position, the footrest is retracted to the bottom of the linkage assembly and tilted and extended.

[0007] Furthermore, the footstool driving plate includes a first driving plate and a second driving plate, the rear end of the first driving plate is rotatably connected to the lower end of the driving connecting rod, the front end of the first driving plate is rotatably connected to the lower end of the second driving plate, the upper end of the second driving plate is rotatably connected to the linkage assembly, and the rear end of the footstool lifting plate is rotatably connected to the middle part of the second driving plate.

[0008] Furthermore, the linkage assembly includes a linkage plate and a seat frame mounting plate, and the linkage mechanism also includes a backrest assembly, the rear ends of the first footrest plate group and the second footrest plate group are both rotatably connected to the front end of the seat frame mounting plate, the rear end of the seat frame mounting plate is rotatably connected to the backrest assembly, the front end of the linkage plate is rotatably connected to the middle part of the second drive plate, the rear end of the footrest lifting plate is rotatably connected to the middle front part of the linkage plate, the middle rear part of the linkage plate is rotatably connected to the base, and the rear end of the linkage plate is rotatably connected to the backrest assembly.

[0009] Furthermore, the linkage plate includes a first section, a second section and a third section which are connected in sequence, an angle is formed between the first section and the second section, an angle is formed between the second section and the third section, the first section and the third section are respectively located on both sides of the second section, the upper end of the first section is rotatably connected to the backrest assembly, the lower end of the first section is rotatably connected to the base, the upper end of the third section is rotatably connected to the rear end of the footrest lifting plate, and the lower end of the third section is rotatably connected to the middle part of the second driving plate.

[0010] Furthermore, the backrest assembly includes a backrest driving plate, a backrest mounting plate and a backrest rotating plate, the front end of the backrest driving plate is rotatably connected to the linkage plate, the rear end of the backrest driving plate is rotatably connected to the upper end of the backrest rotating plate, the middle part of the backrest rotating plate is rotatably connected to the base, the lower end of the backrest rotating plate is rotatably connected to the rear end of the backrest mounting plate, and the front end of the backrest mounting plate is rotatably connected to the seat frame mounting plate; the backrest assembly has a reclining position in which the backrest mounting plate is tilted backward relative to the seat frame mounting plate and a recovery position in which the backrest mounting plate is recovered relative to the seat frame mounting plate, and the driving connecting rod can drive the backrest assembly to switch between the reclining position and the recovery position through the backrest driving plate and the backrest rotating plate.

[0011] Furthermore, the backrest assembly also includes an adapter plate, the upper end of the adapter plate is rotatably connected to the rear end of the backrest mounting plate, and the lower end of the adapter plate is rotatably connected to the lower end of the backrest rotating plate.

[0012] Furthermore, a first limiting column is provided on the base, and the linkage plate can fit with the first limiting column to place the backrest assembly in a reclining position.

[0013] Furthermore, a first guide groove is provided on the base, and the rear end of the backrest driving plate is rotatably connected to the upper end of the backrest rotating plate through a first hinge shaft. The first hinge shaft can be slidably arranged in the first guide groove. When the backrest assembly switches from the retracted position to the reclining position, the first hinge shaft slides from the front end of the first guide groove to its rear end.

[0014] Furthermore, the backrest assembly also includes a guide plate, the upper end of the guide plate is rotatably connected to the middle and rear part of the seat frame mounting plate, and the lower end of the guide plate is rotatably connected to the middle and front part of the backrest rotating plate.

[0015] Furthermore, a second guide groove is provided on the base, and the lower end of the guide plate is rotatably connected to the front and middle part of the backrest rotating plate through a second hinge shaft. The second hinge shaft is slidably arranged in the second guide groove. When the backrest assembly switches from the retracted position to the reclining position, the second hinge shaft slides from the lower end of the second guide groove to its upper end.

[0016] Furthermore, the first footrest board group includes a front board and an inner board, and the second footrest board group includes a rear board and an outer board, the rear end of the front board is rotatably connected to the linkage assembly, the front end of the front board is rotatably connected to the rear end of the inner board, the front end of the inner board is rotatably connected to the front end of the footrest, the rear end of the rear board is rotatably connected to the linkage assembly, the front end of the rear board is rotatably connected to the rear end of the outer board, the front end of the outer board is rotatably connected to the rear end of the footrest, and the front end of the footrest lifting plate is rotatably connected to the rear board.

[0017] Furthermore, a second limiting column is provided on the side of the outer bench plate, and when the footrest assembly is in the extended position, the second limiting column abuts against the front bench plate.

[0018] Furthermore, the footstool drive assembly also includes a linear drive member and a drive tube. A linkage mechanism and a footstool drive assembly are provided on both sides of the base. The drive tube extends laterally, and both ends of the drive tube are respectively connected to corresponding drive connecting rods. The front end of the linear drive member is rotatably connected to the drive tube, and the rear end of the linear drive member is rotatably connected to the base.

[0019] Furthermore, the base includes a base body and two armrest mounting plates, the two armrest mounting plates are respectively located on both sides of the base body and connected to the base body, the linkage assembly is rotatably connected to the base body, and the driving connecting rod is rotatably arranged on the base body.

[0020] Furthermore, the seat bracket also includes a return spring, and both ends of the return spring are respectively connected to the footrest drive plate and the front end of the seat body.

[0021] According to another aspect of the present application, a seat bracket is provided, the seat bracket comprising: a base; a linkage mechanism, including a footrest assembly and a linkage assembly, the footrest assembly comprising a first footrest plate group, a second footrest plate group and a footrest, the front portion of the first footrest plate group and the front portion of the second footrest plate group being rotatably connected to the front end and rear end of the footrest respectively, the middle portion of the first footrest plate group and the middle portion of the second footrest plate group being rotatably connected, the rear end of the first footrest plate group and the rear end of the second footrest plate group being rotatably connected to the linkage assembly, and the linkage assembly being rotatably connected to the base; a footrest drive assembly, the footrest drive assembly being rotatably connected between the base and the linkage assembly; wherein the footrest assembly has a stowed position in which the first footrest plate group and the second footrest plate group are relatively retracted and an extended position in which the first footrest plate group and the second footrest plate group are relatively opened, the footrest drive assembly being capable of driving the footrest assembly to switch between the stowed position and the extended position, and when the footrest assembly is in the stowed position, the footrest is retracted to the bottom of the linkage assembly, and the angle between the bottom surface of the footrest and the horizontal plane is between 25° and 35°.

[0022] According to another aspect of the present application, a seat is provided, comprising the seat bracket provided above.

[0023] According to the technical solution of the present application, a seat frame includes a base, a linkage mechanism, and a footrest drive assembly. When the footrest assembly moves from a stowed position to an extended position, the drive link rotates counterclockwise relative to the base, thereby driving the lower end of the footrest drive plate forward, causing the footrest drive plate to rotate counterclockwise relative to the linkage assembly. The footrest drive plate then drives the footrest lift plate forward, which then drives the first or second footrest plate assembly to move relative to the linkage assembly. Simultaneously, the first footrest plate assembly drives the second footrest plate assembly, or the second footrest plate assembly drives the first footrest plate assembly. Consequently, the footrest assembly moves from a stowed position, in which the first and second footrest plate assembly are relatively retracted, to an extended position, in which the first and second footrest plate assembly are relatively open. When the footrest assembly moves from the extended position to the stowed position, it is sufficient for the components to move in opposite directions, which is not described in detail herein. When the footstool assembly is in the folded position, the footrest can be retracted to the bottom of the linkage assembly and extended obliquely, entering the space under the base through the bottom of the footrest to clean the space under the base. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The drawings that constitute part of this application are used to provide a further understanding of this application. The illustrative embodiments of this application and their descriptions are used to explain this application and do not constitute an improper limitation on this application. In the drawings:

[0025] FIG1 is a schematic structural diagram of an electric seat in a sitting position according to an embodiment of the present application;

[0026] FIG2 shows another structural schematic diagram of the electric seat in a sitting position according to an embodiment of the present application;

[0027] FIG3 shows a schematic structural diagram of an electric seat in a TV posture according to an embodiment of the present application;

[0028] FIG4 shows another structural schematic diagram of the electric seat provided in the TV posture according to an embodiment of the present application;

[0029] FIG5 is a schematic structural diagram of an electric seat in a lying position according to an embodiment of the present application;

[0030] FIG6 shows another structural schematic diagram of the electric seat in a lying position according to an embodiment of the present application;

[0031] FIG7 shows a schematic structural diagram of a manual chair in a sitting position according to an embodiment of the present application;

[0032] FIG8 is a schematic structural diagram of a manual chair in a TV posture according to an embodiment of the present application;

[0033] FIG9 shows another structural schematic diagram of a manual chair in a TV posture according to an embodiment of the present application.

[0034] The above drawings include the following reference numerals: 10, base; 11, first guide groove; 12, second guide groove; 13, seat body; 14, armrest mounting plate; 15, first limiting column; 20, linkage mechanism; 21, footrest assembly; 211, first footrest plate group; 2111, front bench plate; 2112, inner bench plate; 212, second footrest plate group; 2121, rear bench plate; 2122, outer bench plate; 2123, second limiting column; 213, footrest; 22, linkage assembly; 221, linkage plate; 2211, first section; 2212, second section; 2213, third section; 222, seat frame mounting plate; 23, backrest assembly; 231, backrest drive plate; 232, backrest mounting plate; 233, backrest rotation plate; 234, adapter plate; 235, guide plate; 30. Footrest drive assembly; 311. Drive connecting rod; 312. Footrest drive plate; 3121. First drive plate; 3122. Second drive plate; 32. Footrest lifting plate; 33. Linear drive member; 34. Drive tube. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is in no way intended to limit the present application and its application or use. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0036] As shown in Figures 1 to 9, the embodiment of the present application provides a seat bracket, which includes a base 10, a linkage mechanism 20, and a footrest driving assembly 30. The linkage mechanism 20 includes a footrest assembly 21 and a linkage assembly 22. The footrest assembly 21 includes a first footrest plate group 211, a second footrest plate group 212, and a footrest 213. The front portion of the first footrest plate group 211 and the front portion of the second footrest plate group 212 are rotatably connected to the front end and rear end of the footrest 213 respectively, the middle portion of the first footrest plate group 211 and the middle portion of the second footrest plate group 212 are rotatably connected, the rear end of the first footrest plate group 211 and the rear end of the second footrest plate group 212 are both rotatably connected to the linkage assembly 22, and the linkage assembly 22 is rotatably connected to the base 10; the footrest driving assembly 30 includes a driving connecting rod 311, a footrest driving plate 312, and a footrest lifting plate 32. The upper end of the driving connecting rod 311 is rotatably connected to the base 10, the lower end of the driving connecting rod 311 is rotatably connected to the lower end of the footrest driving plate 312, the upper end of the footrest driving plate 312 is rotatably connected to the linkage assembly 22, the rear end of the footrest lifting plate 32 is rotatably connected to the middle part of the footrest driving plate 312, and the front end of the footrest lifting plate 32 is rotatably connected to the first footrest plate group 211 or the second footrest plate group 212; wherein, the footrest assembly 21 has a retracted position in which the first footrest plate group 211 and the second footrest plate group 212 are relatively retracted and an extended position in which the first footrest plate group 211 and the second footrest plate group 212 are relatively opened, and the footrest driving assembly 30 can drive the footrest assembly 21 to switch between the retracted position and the extended position. When the footrest assembly 21 is in the retracted position, the footrest 213 is retracted to the bottom of the linkage assembly 22 and extends obliquely.

[0037] When the footrest assembly 21 moves from the folded position to the extended position, the driving connecting rod 311 rotates counterclockwise relative to the base 10, thereby driving the lower end of the footrest driving plate 312 to move forward, causing the footrest driving plate 312 to rotate counterclockwise relative to the linkage assembly 22. The footrest driving plate 312 drives the footrest lifting plate 32 to move forward, and the footrest lifting plate 32 drives the first footrest plate group 211 or the second footrest plate group 212 to move relative to the linkage assembly 22. At the same time, the first footrest plate group 211 drives the second footrest plate group 212, or the second footrest plate group 212 drives the first footrest plate group 211 to move. The footrest assembly 21 moves from the folded position in which the first footrest plate group 211 and the second footrest plate group 212 are relatively retracted to the extended position in which the first footrest plate group 211 and the second footrest plate group 212 are relatively opened. When the footrest assembly 21 moves from the extended position to the retracted position, the various components simply move in opposite directions, which will not be described in detail here. When the footrest assembly 21 is in the retracted position, the footrest 213 can be retracted below the linkage assembly 22 and tilted to extend downward, passing below the footrest 213 into the space below the base 10 to clear the space below the base 10.

[0038] In the process of the footrest assembly 21 moving from the folded position to the extended position, the footrest 213 gradually changes from an inclined setting to a horizontal setting, and the user's feet can move along with the movement of the footrest 213.

[0039] It should be noted that this seat bracket can be used in both power and manual seats. In power seats, the linear drive member 33 drives the drive link 311 via the drive tube 34, causing the drive link 311 to rotate counterclockwise relative to the base 10, thereby enabling the footrest assembly 21 to move between the stowed and extended positions. In manual seats, the user operates the armrest on the base 10, causing the armrest and the linkage assembly 22 to move relative to each other. The linkage assembly 22 moves backward relative to the base 10, driving the first and second footrest plate groups 211 and 212 backward. Under the action of the reaction force, the base 10 drives the drive link 311 to move. The specific movement process is as described above, enabling the footrest assembly 21 to move between the stowed and extended positions.

[0040] The rotational connection referred to in this application includes two structures: direct rotational connection and indirect rotational connection. The drive link 311 is directly rotationally connected to the base 10, the lower end of the footrest drive plate 312 is directly rotationally connected to the drive link 311, the upper end of the footrest drive plate 312 is directly rotationally connected to the linkage assembly 22, the rear end of the footrest lifting plate 32 is indirectly rotationally connected to the footrest drive plate 312, and the front end of the footrest lifting plate 32 is directly rotationally connected to the second footrest plate assembly 212.

[0041] In this embodiment, when the footrest assembly 21 moves from the folded position to the extended position, the angle between the bottom surface of the footrest 213 and the horizontal plane is between 25° and 35°.

[0042] As shown in Figures 3 and 9, the footrest drive plate 312 includes a first drive plate 3121 and a second drive plate 3122. The rear end of the first drive plate 3121 is rotatably connected to the lower end of the drive link 311, the front end of the first drive plate 3121 is rotatably connected to the lower end of the second drive plate 3122, the upper end of the second drive plate 3122 is rotatably connected to the linkage assembly 22, and the rear end of the footrest lifting plate 32 is rotatably connected to the middle portion of the second drive plate 3122. The footrest drive plate 312 with the above-described structure can make the movement of the footrest assembly 21 smoother.

[0043] Specifically, when the driving link 311 rotates counterclockwise relative to the base 10, the driving link 311 drives the lower end of the first driving plate 3121 to move forward, and then the first driving plate 3121 drives the lower end of the second driving plate 3122 to move forward relative to the linkage assembly 22, so that the second driving plate 3122 rotates counterclockwise, and then the second driving plate 3122 drives the footstool lifting plate 32 to move forward, so that the footstool assembly 21 moves from the folded position to the extended position.

[0044] As shown in Figures 3 and 9, the linkage assembly 22 includes a linkage plate 221 and a seat frame mounting plate 222. The linkage mechanism 20 also includes a backrest assembly 23. The rear ends of the first footrest plate group 211 and the second footrest plate group 212 are both rotatably connected to the front end of the seat frame mounting plate 222. The rear end of the seat frame mounting plate 222 is rotatably connected to the backrest assembly 23. The front end of the linkage plate 221 is rotatably connected to the middle portion of the second drive plate 3122. The rear end of the footrest lifting plate 32 is rotatably connected to the middle front portion of the linkage plate 221. The middle rear portion of the linkage plate 221 is rotatably connected to the base 10. The rear end of the linkage plate 221 is rotatably connected to the backrest assembly 23. With the linkage assembly 22 having the above structure, after the footrest assembly 21 moves to the extended position, the linkage plate 221 can drive the backrest assembly 23 to move, thereby achieving rearward tilt and retraction of the backrest.

[0045] Specifically, when the lower end of the second driving plate 3122 moves forward relative to the seat frame mounting plate 222, the second driving plate 3122 drives the front end of the linkage plate 221 to move forward, and the linkage plate 221 drives the footrest lifting plate 32 to move forward, so as to realize the movement of the footrest assembly 21 from the folded position to the extended position.

[0046] As shown in FIG3 , the linkage plate 221 includes a first section 2211, a second section 2212, and a third section 2213, which are sequentially connected. The first section 2211 and the second section 2212 are angled with each other, and the second section 2212 and the third section 2213 are angled with each other. The first section 2211 and the third section 2213 are located on either side of the second section 2212. The upper end of the first section 2211 is pivotally connected to the backrest assembly 23, and the lower end of the first section 2211 is pivotally connected to the base 10. The upper end of the third section 2213 is pivotally connected to the rear end of the footrest lifting plate 32, and the lower end of the third section 2213 is pivotally connected to the middle portion of the second drive plate 3122. The linkage plate 221 with the above-described structure not only makes the movement of the seat frame smoother, but also provides a higher structural strength.

[0047] In this embodiment, the footrest lifting plate 32 is an L-shaped structure, which can not only make the movement of the seat bracket smoother, but also make it have a higher structural strength.

[0048] As shown in Figures 5 and 8, the backrest assembly 23 includes a backrest drive plate 231, a backrest mounting plate 232, and a backrest rotation plate 233. The front end of the backrest drive plate 231 is rotatably connected to the linkage plate 221, the rear end of the backrest drive plate 231 is rotatably connected to the upper end of the backrest rotation plate 233, the middle portion of the backrest rotation plate 233 is rotatably connected to the base 10, the lower end of the backrest rotation plate 233 is rotatably connected to the rear end of the backrest mounting plate 232, and the front end of the backrest mounting plate 232 is rotatably connected to the seat frame mounting plate 222. The backrest assembly 23 has a reclining position in which the backrest mounting plate 232 is tilted backward relative to the seat frame mounting plate 222 and a retracted position in which the backrest mounting plate 232 is retracted relative to the seat frame mounting plate 222. The driving link 311 can drive the backrest assembly 23 to switch between the reclining position and the retracted position via the backrest drive plate 231 and the backrest rotation plate 233. Using the above-mentioned backrest assembly 23, after the footrest assembly 21 moves to the extended position, the second drive plate 3122 drives the linkage plate 221 to rotate counterclockwise relative to the base 10, and the linkage plate 221 drives the backrest drive plate 231 to move backward. The backrest drive plate 231 drives the backrest rotation plate 233 to rotate counterclockwise relative to the base 10, and then the backrest rotation plate 233 drives the backrest mounting plate 232 to rotate counterclockwise relative to the seat frame mounting plate 222, so that the backrest assembly 23 moves from the retracted position to the reclining position.

[0049] It should be noted that the backrest rotating plate 233 is indirectly rotatably connected to the backrest mounting plate 232 .

[0050] As shown in Figures 5 and 8, the backrest assembly 23 further includes an adapter plate 234. The upper end of the adapter plate 234 is rotatably connected to the rear end of the backrest mounting plate 232, and the lower end of the adapter plate 234 is rotatably connected to the lower end of the backrest rotating plate 233. The provision of the adapter plate 234 can make the movement of the backrest mounting plate 232 smoother.

[0051] As shown in Figure 5, the base 10 is provided with a first limiting post 15, and the linkage plate 221 can be fitted with the first limiting post 15 to place the backrest assembly 23 in the reclining position. The first limiting post 15 can keep the backrest assembly 23 in the reclining position, making the seat frame more stable.

[0052] As shown in Figures 5 and 8, the backrest assembly 23 further includes a guide plate 235. The upper end of the guide plate 235 is pivotally connected to the middle and rear portion of the seat frame mounting plate 222, and the lower end of the guide plate 235 is pivotally connected to the middle and front portion of the backrest rotation plate 233. The use of the guide plate 235 enables the movement of the backrest rotation plate 233 to be linked with the movement of the seat frame mounting plate 222, thereby enabling the seat and back to be linked, thereby providing a more comfortable user experience.

[0053] As shown in FIG2 , the base 10 is provided with a second guide slot 12. The lower end of the guide plate 235 is pivotally connected to the center-front portion of the backrest rotation plate 233 via a second hinge shaft. The second hinge shaft slidably extends through the second guide slot 12. When the backrest assembly 23 is switched from the retracted position to the reclining position, the second hinge shaft slides from the lower end of the second guide slot 12 to the upper end thereof. The second guide slot 12 guides the movement of the guide plate 235 and the backrest adapter plate 234, allowing the center-front portion of the backrest rotation plate 233 to move along the direction in which the second guide slot 12 extends.

[0054] As shown in Figures 3 and 9, the first footrest board group 211 includes a front board 2111 and an inner board 2112, and the second footrest board group 212 includes a rear board 2121 and an outer board 2122. The rear end of the front board 2111 is rotatably connected to the linkage assembly 22, the front end of the front board 2111 is rotatably connected to the rear end of the inner board 2112, the front end of the inner board 2112 is rotatably connected to the front end of the footrest 213, the rear end of the rear board 2121 is rotatably connected to the linkage assembly 22, the front end of the rear board 2121 is rotatably connected to the rear end of the outer board 2122, the front end of the outer board 2122 is rotatably connected to the rear end of the footrest 213, and the front end of the footrest lifting plate 32 is rotatably connected to the rear board 2121. With the footrest assembly 21 having the above-mentioned structure, when the footrest assembly 21 is switched from the folded position to the extended position, the footrest lifting plate 32 can be used to drive the front bench board 2111 to rotate counterclockwise relative to the seat frame mounting plate 222, thereby causing the front bench board 2111 to drive the inner bench board 2112 to move forward. At the same time, the front bench board 2111 drives the rear bench board 2121 rotatably connected thereto to move forward, and the rear bench board 2121 drives the outer bench board 2122 rotatably connected thereto to move forward, so that the footrest assembly 21 is switched from the folded position to the extended position, and the footrest 213 is moved to a nearly horizontal state.

[0055] As shown in Figures 3 and 9, a second limiting post 2123 is provided on the side of the outer bench plate 2122. When the footrest assembly 21 is in the extended position, the second limiting post 2123 abuts against the front bench plate 2111. The second limiting post 2123 can keep the footrest assembly in the extended position.

[0056] As shown in Figure 1, the base 10 includes a seat body 13 and two armrest mounting plates 14. The two armrest mounting plates 14 are located on either side of the seat body 13 and are connected to the seat body 13. The linkage assembly 22 is rotatably connected to the seat body 13, and the drive link 311 is rotatably mounted on the seat body 13. The use of the base 10 with the above structure can make the structure of the chair frame more reasonable and improve the user experience.

[0057] The two armrest mounting plates 14 are respectively located on two sides of the base body 13 , namely, the left side and the right side of the base body 13 .

[0058] As shown in FIG1 , a first embodiment of the present application provides a chair support. In this embodiment, a footrest drive assembly 30 includes a linear drive member 33 and a drive tube 34. A linkage mechanism 20 and a footrest drive assembly 30 are provided on both sides of the base 10. The drive tube 34 extends laterally, and both ends of the drive tube 34 are rotatably connected to corresponding drive links 311. The front end of the linear drive member 33 is rotatably connected to the drive tube 34, and the rear end of the linear drive member 33 is rotatably connected to the base 10. By shortening the length of the linear drive member 33, the drive tube 34 can rotate counterclockwise, and the drive tube 34 drives the drive link 311 to rotate counterclockwise relative to the base 10, thereby moving the footrest assembly 21 from the stowed position to the extended position. Furthermore, through the linkage assembly 22, the backrest assembly 23 can be moved from the retracted position to the reclining position.

[0059] In the first embodiment, the seat bracket is applied to an electric seat.

[0060] The linear drive member 33 may be an electric push rod or a slider motor.

[0061] In the first embodiment, mounting plates are provided on the base 10 and the driving tube 34 , and the front end and the rear end of the linear driving member 33 are rotatably connected to the base 10 and the driving tube 34 respectively through the mounting plates.

[0062] As shown in FIG2 , in the first embodiment, a first guide slot 11 is provided on the base 10. The rear end of the backrest drive plate 231 and the upper end of the backrest rotation plate 233 are rotatably connected via a first hinge shaft. The first hinge shaft is slidably disposed within the first guide slot 11. When the backrest assembly 23 switches from the retracted position to the reclining position, the first hinge shaft slides from the front end of the first guide slot 11 to the rear end thereof. The provision of the first guide slot 11 guides the movement of the rear end of the backrest drive plate 231 and the upper end of the backrest rotation plate 233, allowing the upper end of the backrest rotation plate 233 to move along the direction extending from the first guide slot 11.

[0063] As shown in Figures 7 to 9, a second embodiment of the present application provides a seat frame. In this embodiment, the seat frame further includes a return spring, the ends of which are respectively connected to the footrest drive plate 312 and the front end of the seat body 13. The return spring can achieve automatic return of the footrest assembly 21 and the backrest assembly 23, allowing the footrest assembly 21 to move from an extended position to a retracted position and the backrest assembly 23 to move from a reclined position to a retracted position.

[0064] In the second embodiment, the seat bracket is applied to a manual seat.

[0065] Another embodiment of the present application provides a seat frame, which includes a base 10, a linkage mechanism 20, and a footrest drive assembly 30. The linkage mechanism 20 includes a footrest assembly 21 and a linkage assembly 22. The footrest assembly 21 includes a first footrest plate group 211, a second footrest plate group 212, and a footrest 213. The front portion of the first footrest plate group 211 and the front portion of the second footrest plate group 212 are rotatably connected to the front end and the rear end of the footrest 213, respectively. The middle portion of the first footrest plate group 211 and the middle portion of the second footrest plate group 212 are rotatably connected. The rear end of the first footrest plate group 211 and the rear end of the second footrest plate group 212 are both rotatably connected to the linkage assembly 22. The linkage assembly 22 is rotatably connected to the base 10; the footstool drive assembly 30 is rotatably connected between the base 10 and the linkage assembly 22; wherein, the footstool assembly 21 has a retracted position in which the first footstool board group 211 and the second footstool board group 212 are relatively retracted, and an extended position in which the first footstool board group 211 and the second footstool board group 212 are relatively opened. The footstool drive assembly 30 can drive the footstool assembly 21 to switch between the retracted position and the extended position. When the footstool assembly 21 is in the retracted position, the footrest 213 is retracted to the bottom of the linkage assembly 22, and the angle between the bottom surface of the footrest 213 and the horizontal plane is between 25° and 35°. With this seat bracket, when the footrest assembly 21 is in the folded position, the footrest 213 can be retracted to the bottom of the linkage assembly 22, and the angle between the bottom surface of the footrest 213 and the horizontal plane is between 25° and 35°. The space below the base 10 can be entered through the bottom of the footrest 213 to clean the space below the base 10.

[0066] The angle between the bottom surface of the footrest 213 and the horizontal plane can be between 20° and 40°, preferably between 25° and 35°. In this embodiment, the angle between the bottom surface of the footrest 213 and the horizontal plane is 27°.

[0067] It should be noted that, in this embodiment, the footrest drive assembly 30 is not limited to the structure of the first embodiment of the present application, and may be other structures as long as it can drive the footrest assembly 21 to switch between the folded position and the extended position.

[0068] Another embodiment of the present application provides a chair comprising the aforementioned seat bracket. With this chair, when the footrest assembly 21 is in the folded position, the footrest 213 can be retracted below the linkage assembly 22 and tilted to extend downward, thereby accessing the space below the base 10 through the footrest 213 to clear the space below the base 10.

[0069] The following is an explanation of the specific working process of the electric seat:

[0070] When the electric chair switches from a sitting position to a TV position, when the length of the linear drive member 33 is shortened, the linear drive member 33 drives the drive tube 34 to rotate counterclockwise, and the drive tube 34 drives the drive link 311 to rotate counterclockwise relative to the seat body 13, and the drive link 311 drives the first drive plate 3121 to move forward, and the first drive plate 3121 drives the lower end of the second drive plate 3122 to move forward, and the second drive plate 3122 drives the linkage plate 221 to rotate counterclockwise relative to the seat body 13. At the same time, the front end of the linkage plate 221 moves forward. , and the seat frame mounting plate 222 moves rearward relative to the seat body 13, the linkage plate 221 drives the footrest lifting plate 32 forward, causing the rear bench plate 2121 to rotate counterclockwise relative to the seat frame mounting plate 222, and driving the outer bench plate 2122 forward. The outer bench plate 2122 drives the front bench plate 2111 to rotate counterclockwise relative to the seat frame mounting plate 222, and the front bench plate 2111 drives the inner bench plate 2112 forward. Simultaneously, the inner bench plate 2112 and the outer bench plate 2122 jointly drive the footrest 213 to move to a nearly horizontal state. After the footrest assembly 21 is in the extended position, the backrest assembly 23 is in the retracted position.

[0071] When the electric chair switches from the TV position to the lying position, the length of the linear drive member 33 continues to shorten, the linear drive member 33 drives the drive tube 34 to continue to rotate counterclockwise, the drive tube 34 drives the drive connecting rod 311 to continue to rotate counterclockwise relative to the seat body 13, the drive connecting rod 311 drives the first drive plate 3121 to move forward, the first drive plate 3121 drives the lower end of the second drive plate 3122 to move forward, and the second drive plate 3122 drives the linkage plate 221 to rotate counterclockwise relative to the seat body 13. At this time, due to the limiting effect of the second limiting column 2123, the footrest assembly 21 cannot continue to extend. The linkage plate 221 drives the backrest drive plate 231 to move backward, which in turn drives the backrest rotation plate 233 to rotate counterclockwise relative to the seat body 13. Simultaneously, the first hinge shaft moves backward along the extension direction of the first guide slot 11. The backrest rotation plate 233 drives the backrest mounting plate 232 to rotate counterclockwise relative to the seat frame mounting plate 222 via the adapter plate 234, thereby moving the backrest assembly 23 from the retracted position to the reclining position. Simultaneously, during the rotation of the backrest rotation plate 233, the seat frame mounting plate 222 and the backrest mounting plate 232 are linked via the guide plate 235.

[0072] The process of the electric seat moving from a lying position to a sitting position only requires the linear drive member 33 to be extended and the movement process of each component to be reversed, which will not be described in detail here.

[0073] The following is an explanation of the specific working process of the manual seat:

[0074] When the electric seat switches from a sitting position to a TV position, the user pushes the armrest with his hand, and the armrest transmits the force to the seat body 13 through the armrest mounting plate 14. Due to the action of the reaction force, the seat frame mounting plate 222 moves backward relative to the armrest mounting plate 14. Since the armrest mounting plate 14 is set on the seat body 13, the seat frame mounting plate 222 and the seat body 13 move relative to each other, causing the upper end of the second drive plate 3122 to move backward, and the lower end of the second drive plate 3122 will move forward through the drive connecting rod 311 and the first drive plate 3121. At the same time, the second drive plate 3122 drives the linkage plate 221 to move forward. The subsequent working process is the same as that of the electric seat, causing the footrest assembly 21 to move to the extended position. At this time, the backrest assembly 23 is in the retracted position.

[0075] When the electric seat switches from the TV position to the lying position, the user squeezes the backrest backward, and the backrest is tilted back relative to the seat frame mounting plate 222 through the backrest mounting plate 232. Specifically, during the process of tilting back, the backrest mounting plate 232 drives the backrest rotating plate 233 to rotate counterclockwise through the adapter plate 234. At the same time, during the rotation of the backrest rotating plate 233, the seat frame mounting plate 222 and the backrest mounting plate 232 are linked through the guide plate 235.

Claims

1. A seat bracket, characterized in that: The seat support comprises: Base (10); A linkage mechanism (20) comprises a footstool assembly (21) and a linkage assembly (22), wherein the footstool assembly (21) comprises a first footstool board group (211), a second footstool board group (212) and a footrest board (213), wherein the front portion of the first footstool board group (211) and the front portion of the second footstool board group (212) are rotatably connected to the front end and the rear end of the footrest board (213), respectively, the middle portion of the first footstool board group (211) and the middle portion of the second footstool board group (212) are rotatably connected, the rear ends of the first footstool board group (211) and the rear ends of the second footstool board group (212) are both rotatably connected to the linkage assembly (22), and the linkage assembly (22) is rotatably connected to the base (10); A footstool driving assembly (30), comprising a driving connecting rod (311), a footstool driving plate (312) and a footstool lifting plate (32), wherein the upper end of the driving connecting rod (311) is rotatably connected to the base (10), the lower end of the driving connecting rod (311) is rotatably connected to the lower end of the footstool driving plate (312), the upper end of the footstool driving plate (312) is rotatably connected to the linkage assembly (22), the rear end of the footstool lifting plate (32) is rotatably connected to the middle part of the footstool driving plate (312), and the front end of the footstool lifting plate (32) is rotatably connected to the first footstool plate group (211) or the second footstool plate group (212); The footrest assembly (21) has a folded position in which the first footrest board group (211) and the second footrest board group (212) are relatively retracted, and an extended position in which the first footrest board group (211) and the second footrest board group (212) are relatively opened. The footrest driving assembly (30) is capable of driving the footrest assembly (21) to switch between the folded position and the extended position. When the footrest assembly (21) is located at the folded position, the footrest (213) is retracted to the bottom of the linkage assembly (22) and extends obliquely.

2. The seat support according to claim 1, characterized in that: The footstool driving plate (312) comprises a first driving plate (3121) and a second driving plate (3122); the rear end of the first driving plate (3121) is rotatably connected to the lower end of the driving connecting rod (311); the front end of the first driving plate (3121) is rotatably connected to the lower end of the second driving plate (3122); the upper end of the second driving plate (3122) is rotatably connected to the linkage assembly (22); and the rear end of the footstool lifting plate (32) is rotatably connected to the middle part of the second driving plate (3122).

3. The seat support according to claim 2, characterized in that: The linkage assembly (22) comprises a linkage plate (221) and a seat frame mounting plate (222); the linkage mechanism (20) further comprises a backrest assembly (23); the rear ends of the first footrest plate group (211) and the second footrest plate group (212) are both rotatably connected to the front end of the seat frame mounting plate (222); the rear end of the seat frame mounting plate (222) is rotatably connected to the backrest assembly (23); the front end of the linkage plate (221) is rotatably connected to the middle part of the second driving plate (3122); the rear end of the footrest lifting plate (32) is rotatably connected to the middle front part of the linkage plate (221); the middle rear part of the linkage plate (221) is rotatably connected to the base (10); and the rear end of the linkage plate (221) is rotatably connected to the backrest assembly (23); The linkage plate (221) comprises a first section (2211), a second section (2212) and a third section (2213) which are connected in sequence; an angle is formed between the first section (2211) and the second section (2212); an angle is formed between the second section (2212) and the third section (2213); the first section (2211) and the third section (2213) are respectively located on both sides of the second section (2212); the upper end of the first section (2211) is rotatably connected to the backrest assembly (23); the lower end of the first section (2211) is rotatably connected to the base (10); the upper end of the third section (2213) is rotatably connected to the rear end of the footrest lifting plate (32); and the lower end of the third section (2213) is rotatably connected to the middle part of the second driving plate (3122).

4. The seat support according to claim 3, characterized in that: The backrest assembly (23) comprises a backrest driving plate (231), a backrest mounting plate (232) and a backrest rotating plate (233); the front end of the backrest driving plate (231) is rotatably connected to the linkage plate (221); the rear end of the backrest driving plate (231) is rotatably connected to the upper end of the backrest rotating plate (233); the middle part of the backrest rotating plate (233) is rotatably connected to the base (10); the lower end of the backrest rotating plate (233) is rotatably connected to the rear end of the backrest mounting plate (232); and the front end of the backrest mounting plate (232) is rotatably connected to the seat frame mounting plate (222); The backrest assembly (23) has a reclining position in which the backrest mounting plate (232) is tilted backward relative to the seat frame mounting plate (222) and a retracted position in which the backrest mounting plate (222) is retracted relative to the seat frame mounting plate (222), and the driving connecting rod (311) can drive the backrest assembly (23) to switch between the reclining position and the retracted position via the backrest driving plate (231) and the backrest rotating plate (233); The backrest assembly (23) further comprises an adapter plate (234), the upper end of which is rotatably connected to the rear end of the backrest mounting plate (232), and the lower end of which is rotatably connected to the lower end of the backrest rotating plate (233).

5. The seat support according to claim 4, characterized in that: The base (10) is provided with a first limiting column (15), and the linkage plate (221) can be fitted with the first limiting column (15) so that the backrest assembly (23) is located in the reclining position; The base (10) is provided with a first guide groove (11), the rear end of the backrest driving plate (231) is rotatably connected to the upper end of the backrest rotating plate (233) via a first hinge shaft, the first hinge shaft is slidably arranged in the first guide groove (11), and when the backrest assembly (23) is switched from the recovery position to the reclining position, the first hinge shaft slides from the front end of the first guide groove (11) to the rear end thereof; The backrest assembly (23) further comprises a guide plate (235), the upper end of the guide plate (235) being rotatably connected to the middle and rear part of the seat frame mounting plate (222), and the lower end of the guide plate (235) being rotatably connected to the middle and front part of the backrest rotating plate (233); A second guide groove (12) is provided on the base (10), and the lower end of the guide plate (235) is rotatably connected to the middle front part of the backrest rotating plate (233) via a second hinge shaft. The second hinge shaft is slidably arranged in the second guide groove (12). When the backrest assembly (23) switches from the recovery position to the reclining position, the second hinge shaft slides from the lower end of the second guide groove (12) to its upper end.

6. The seat support according to claim 1, characterized in that: The first footrest board group (211) comprises a front bench board (2111) and an inner bench board (2112); the second footrest board group (212) comprises a rear bench board (2121) and an outer bench board (2122); the rear end of the front bench board (2111) is rotatably connected to the linkage assembly (22); the front end of the front bench board (2111) is rotatably connected to the rear end of the inner bench board (2112); the front end of the inner bench board (2112) is rotatably connected to the front end of the footrest board (213); the rear end of the rear bench board (2121) is rotatably connected to the linkage assembly (22); the front end of the rear bench board (2121) is rotatably connected to the rear end of the outer bench board (2122); the front end of the outer bench board (2122) is rotatably connected to the rear end of the footrest board (213); and the front end of the footrest lifting plate (32) is rotatably connected to the rear bench board (2121); A second limiting column (2123) is provided on the side of the outer stool board (2122), and when the footstool assembly (21) is located in the extended position, the second limiting column (2123) abuts against the front stool board (2111); The footstool drive assembly (30) further comprises a linear drive member (33) and a drive tube (34). The linkage mechanism (20) and the footstool drive assembly (30) are arranged on both sides of the base (10). The drive tube (34) extends in a transverse direction. Both ends of the drive tube (34) are respectively connected to the corresponding drive connecting rods (311) in a driving manner. The front end of the linear drive member (33) is rotatably connected to the drive tube (34), and the rear end of the linear drive member (33) is rotatably connected to the base (10).

7. The seat support according to claim 1, characterized in that: The base (10) comprises a base body (13) and two armrest mounting plates (14), wherein the two armrest mounting plates (14) are respectively located on two sides of the base body (13) and connected to the base body (13), the linkage assembly (22) is rotatably connected to the base body (13), and the driving connecting rod (311) is rotatably arranged on the base body (13).

8. The seat support according to claim 7, characterized in that: The seat support also includes a return spring, the two ends of which are respectively connected to the footrest drive plate (312) and the front end of the seat body (13).

9. A seat support, characterized in that: The seat support comprises: Base (10); A linkage mechanism (20) comprises a footstool assembly (21) and a linkage assembly (22), wherein the footstool assembly (21) comprises a first footstool board group (211), a second footstool board group (212) and a footrest board (213), wherein the front portion of the first footstool board group (211) and the front portion of the second footstool board group (212) are rotatably connected to the front end and the rear end of the footrest board (213), respectively, the middle portion of the first footstool board group (211) and the middle portion of the second footstool board group (212) are rotatably connected, the rear ends of the first footstool board group (211) and the rear ends of the second footstool board group (212) are both rotatably connected to the linkage assembly (22), and the linkage assembly (22) is rotatably connected to the base (10); A footstool drive assembly (30), the footstool drive assembly (30) being rotatably connected between the base (10) and the linkage assembly (22); The footstool assembly (21) has a folded position in which the first footstool board group (211) and the second footstool board group (212) are relatively retracted, and an extended position in which the first footstool board group (211) and the second footstool board group (212) are relatively opened. The footstool drive assembly (30) is capable of driving the footstool assembly (21) to switch between the folded position and the extended position. When the footstool assembly (21) is located at the folded position, the footrest (213) is retracted to the bottom of the linkage assembly (22), and the angle between the bottom surface of the footrest (213) and the horizontal plane is between 25° and 35°.

10. A seat, characterized in that: The seat comprises the seat support according to any one of claims 1 to 9.

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