Seat bracket and seat having same

Abstract

Provided in the present application are a seat bracket and a seat having same. The seat bracket comprises: a seat frame; a footrest assembly, which comprises a first footstool rod, a second footstool rod and a footrest plate, a front end of the first footstool rod and a front end of the second footstool rod being both hinged to the footrest plate; a drive assembly, which comprises a linear drive member and a drive rod set, a rear end of the drive rod set being hinged to the seat frame, a front end of the drive rod set being hinged to both the first footstool rod and the second footstool rod, and the linear drive member being fixedly connected to the middle of the drive rod set to enable the drive rod set to rotate, wherein the footrest assembly has a folded position in which the footrest is retracted to the seat frame and an extended position in which the footrest is extended to the front of the seat frame, and the linear drive member can drive the footrest to switch between the folded position and the extended position by means of the drive rod set. By means of the technical solution of the present application, the problem of large change of a linkage portion of a seat iron frame in the prior art can be 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 February 6, 2024, with application number 202420285886.8 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 living standards improve, functional sofas and chairs are becoming increasingly common. Seats typically offer three seating 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 are extended forward, while the backrest remains essentially unchanged. In the reclining position, the backrest tilts back to provide rest.

[0004] Among them, the footrest of conventional chairs is usually folded under the seat frame in a nearly vertical position, resulting in the footrest blocking the bottom of the sofa seat or seat, making the bottom of the sofa or seat difficult to clean. Therefore, the iron frame of the chair with an oblique footrest came into being.

[0005] However, the leg links of conventional seats mostly adopt a four-bar linkage mechanism, and there is no separate leg link designed for the corresponding footrest and tilted seat frame. The leg link needs to be linked with other parts of the seat frame structure, which requires large-scale changes to the linkage part. Summary of the Invention

[0006] 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 linkage part of the seat iron frame requires much modification.

[0007] According to one aspect of the present application, a seat bracket is provided, which includes: a seat frame; a footrest assembly, including a first footrest rod, a second footrest rod and a footrest, the front ends of the first footrest rod and the second footrest rod being hinged to the footrest respectively; a drive assembly, including a linear drive member and a drive rod group, the rear end of the drive rod group being hinged to the seat frame, the front ends of the drive rod group being hinged to the first footrest rod and the second footrest rod respectively, the linear drive member being fixedly connected to the middle portion of the drive rod group to rotate the drive rod group; wherein the footrest assembly has a folded position in which the footrest is retracted to the seat frame and an extended position in which the footrest is extended to the front of the seat frame, and the linear drive member can drive the footrest to switch between the folded position and the extended position via the drive rod group.

[0008] Furthermore, the first footstool rod includes a first connecting rod, a second connecting rod and a third connecting rod arranged in sequence from back to front, the rear end of the first connecting rod is hinged to the driving rod group, the front end of the first connecting rod is hinged to the rear end of the second connecting rod, the middle part of the second connecting rod is hinged to the middle part of the second footstool rod, the front end of the second connecting rod is hinged to the rear end of the third connecting rod, and the front end of the third connecting rod is hinged to the footrest.

[0009] Furthermore, the first connecting rod is located on the outside of the drive rod group, and the linear drive member is located on the inside of the drive rod group; and / or, when the footrest is in the extended position, the hinge point of the first connecting rod and the drive rod group is located in front of the connection point of the linear drive member and the drive rod group.

[0010] Furthermore, a first limiting column is provided on the side of the footrest, and when the footrest is in the extended position, the first limiting column is in contact with the third connecting rod to keep the footrest in the extended position; and / or, the footrest includes a connected hinge plate and a load-bearing plate, and there is an angle between the hinge plate and the load-bearing plate, and the third connecting rod and the second footrest rod are both hinged to the hinge plate, and when the footrest is in the folded position, the second footrest rod is in contact with the load-bearing plate to keep the footrest in the folded position.

[0011] Furthermore, the driving rod group includes a driving rod and a third footstool rod, the rear end of the driving rod is hinged to the seat frame, the front end of the driving rod is hinged to the first footstool rod and the second footstool rod respectively, the linear driving member is fixedly connected to the middle part of the driving rod, the rear end of the third footstool rod is hinged to the seat frame, the front end of the third footstool rod is hinged to the rear end of the second footstool rod, and the front end of the driving rod is hinged to the middle part of the second footstool rod.

[0012] Furthermore, a second limiting column is provided on the seat frame. When the footrest is in the folded position, the second limiting column fits with the third footstool rod to keep the footrest in the folded position.

[0013] Furthermore, the drive assembly also includes a drive tube and a transmission rod. The linear drive member extends in the front-to-back direction. The drive tube is perpendicular to the movement direction of the linear drive member. The linear drive member is driven and connected to the drive tube so that the drive tube rotates around its own axis. The drive tube is connected to the drive rod through the transmission rod.

[0014] Furthermore, the seat frame includes two footrest assemblies, the seat frame includes two seat frame plates, the drive assembly includes two drive rods and two transmission rods, the two seat frame plates are spaced apart along the extension direction of the drive tube, the footrest assembly is hinged to the corresponding seat frame plates through the drive rod, the two ends of the drive tube are respectively connected to the corresponding transmission rods, and each transmission rod is respectively connected to the corresponding drive rod.

[0015] Furthermore, when the footrest is in the folded position, the footrest is retracted to the bottom of the seat frame and tilted, and the angle between the footrest and the horizontal plane is between 20° and 25°.

[0016] According to another aspect of the present application, a seat is provided, comprising the seat bracket provided above.

[0017] Applying the technical solution of the present application, the chair support includes a seat frame, a footrest assembly, and a drive assembly. When the user switches from a sitting position to a TV position, the linear drive member drives the drive rod assembly to rotate counterclockwise relative to the seat frame, and the front end of the drive rod assembly is used to drive the first footstool rod and the second footstool rod to extend relative to the seat frame. During the process of extending the first footstool rod and the second footstool rod, the front end of the first footstool rod and the front end of the second footstool rod drives the footrest to rotate, so that the footrest rotates to a nearly horizontal state, and the footrest moves from a retracted position relative to the seat frame to an extended position extending in front of the seat frame. When the footrest moves from the extended position to the retracted position, this can be achieved by causing the linear drive member to drive the drive rod assembly to rotate clockwise relative to the seat frame. Since the drive rod assembly is only hinged to the seat frame, and the footrest assembly does not form a linkage relationship with other structures of the chair support, there is no need to make large-scale changes to the linkage part. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] 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:

[0019] FIG1 is a schematic structural diagram of a seat support in a TV posture according to an embodiment of the present application;

[0020] FIG2 shows another structural schematic diagram of a seat support in a TV posture according to an embodiment of the present application;

[0021] FIG3 is a schematic structural diagram of a seat support in a lying position according to an embodiment of the present application;

[0022] FIG4 shows another structural schematic diagram of the seat support provided in an embodiment of the present application in a lying position.

[0023] Among them, the above-mentioned drawings include the following figure marks: 10, seat frame; 20, footrest assembly; 21, first footrest rod; 211, first connecting rod; 212, second connecting rod; 213, third connecting rod; 22, second footrest rod; 23, footrest board; 231, first limiting column; 232, hinged plate; 233, load-bearing plate; 24, third footrest rod; 30, drive assembly; 31, drive rod; 32, drive tube; 33, transmission rod. DETAILED DESCRIPTION

[0024] 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.

[0025] As shown in Figures 1 to 4, an embodiment of the present application provides a seat bracket, which includes a seat frame 10, a footrest assembly 20, and a drive assembly 30. The footrest assembly 20 includes a first footrest rod 21, a second footrest rod 22 and a footrest board 23. The front end of the first footrest rod 21 and the front end of the second footrest rod 22 are respectively hinged to the footrest board 23; the drive assembly 30 includes a linear drive member and a drive rod group. The rear end of the drive rod group is hinged to the seat frame 10, and the front end of the drive rod group is respectively hinged to the first footrest rod 21 and the second footrest rod 22. The linear drive member is fixedly connected to the middle part of the drive rod group to rotate the drive rod group; wherein the footrest assembly 20 has a folded position in which the footrest board 23 is retracted to the seat frame 10 and an extended position in which the footrest board 23 is extended to the front of the seat frame 10. The linear drive member can drive the footrest board 23 to switch between the folded position and the extended position through the drive rod group.

[0026] Using the technical solution of the present application, a chair frame includes a seat frame 10, a footrest assembly 20, and a drive assembly 30. When a user switches from a sitting position to a TV position, a linear drive member drives the drive rod assembly to rotate counterclockwise relative to the seat frame 10. The front end of the drive rod assembly drives the first footrest rod 21 and the second footrest rod 22 to extend relative to the seat frame 10. During the extension of the first and second footrest rods 21 and 22, the front ends of the first and second footrest rods 21 and 22 drive the footrest 23 to rotate, causing the footrest 23 to rotate to a substantially horizontal position. The footrest 23 moves from a retracted position relative to the seat frame 10 to an extended position extending forward of the seat frame 10. This is achieved by causing the linear drive member to drive the drive rod assembly to rotate clockwise relative to the seat frame 10 when the user switches from a sitting position to a TV position. Because the drive rod assembly is hinged only to the seat frame 10, and the footrest assembly 20 is not linked to other structures of the chair frame, no major modifications to the linkage components are required.

[0027] As shown in Figure 1, the first footstool rod 21 includes a first connecting rod 211, a second connecting rod 212 and a third connecting rod 213 arranged in sequence from back to front. The rear end of the first connecting rod 211 is hinged to the driving rod group, the front end of the first connecting rod 211 is hinged to the rear end of the second connecting rod 212, the middle part of the second connecting rod 212 is hinged to the middle part of the second footstool rod 22, the front end of the second connecting rod 212 is hinged to the rear end of the third connecting rod 213, and the front end of the third connecting rod 213 is hinged to the footrest 23. Using the above-mentioned first footstool rod 21, when the driving rod 31 rotates relative to the seat frame 10, the driving rod 31 drives the first connecting rod 211 to rotate, the first connecting rod 211 drives the second connecting rod 212 to rotate relative to the second footstool rod 22, the second connecting rod 212 drives the third connecting rod 213 to rotate, and then the third connecting rod 213 and the second footstool rod 22 drive the footrest 23 to rotate, so that the footrest 23 can switch between the retracted position and the extended position.

[0028] In this embodiment, the front portion of the driving rod 31, the first link 211, the rear portion of the second link 212 and the rear portion of the second footrest rod 22 form a four-bar linkage, and the front portion of the second link 212, the third link 213, the footrest 23 and the front portion of the second footrest rod 22 form a four-bar linkage.

[0029] When the footrest 23 is located at the extended position, the hinge point between the third connecting rod 213 and the footrest 23 is located in front of the hinge point between the second footrest rod 22 and the footrest 23 .

[0030] As shown in FIG. 1 and FIG. 2 , the first connecting rod 211 is located on the outside of the driving rod group, and the linear driving member is located on the inside of the driving rod group. The above structure has the advantage of being easy to connect.

[0031] In this embodiment, when the footrest 23 is located at the extended position, the hinge point between the first connecting rod 211 and the driving rod assembly is located in front of the connection point between the linear driving member and the driving rod assembly.

[0032] As shown in Figure 1, a first limiting column 231 is provided on the side of the footrest 23. When the footrest 23 is in the extended position, the first limiting column 231 fits with the third connecting rod 213 to keep the footrest 23 in the extended position. The first limiting column 231 can prevent the footrest assembly 20 from over-extension, thereby improving the consistency between the left and right sides of the seat.

[0033] The footrest 23 includes a hinge plate 232 and a support plate 233 connected to each other. The hinge plate 232 and the support plate 233 form an angle between them. The third connecting rod 213 and the second footrest rod 22 are both hingedly connected to the hinge plate 232. When the footrest 23 is in the retracted position, the second footrest rod 22 abuts against the support plate 233 to maintain the footrest 23 in the retracted position. The use of this footrest 23 prevents the footrest assembly 20 from being over-retracted, thereby improving the consistency between the left and right sides of the seat.

[0034] As shown in Figure 1, the drive rod assembly includes a drive rod 31 and a third footrest rod 24. The rear end of the drive rod 31 is hinged to the seat frame 10, and the front end of the drive rod 31 is hinged to the first footrest rod 21 and the second footrest rod 22, respectively. The linear drive member is fixedly connected to the middle portion of the drive rod 31. The rear end of the third footrest rod 24 is hinged to the seat frame 10, the front end of the third footrest rod 24 is hinged to the rear end of the second footrest rod 22, and the front end of the drive rod 31 is hinged to the middle portion of the second footrest rod 22. The third footrest rod 24 ensures more stable movement of the drive rod 31 relative to the seat frame 10.

[0035] The front portion of the drive rod 31, the first footrest rod 21, the second footrest rod 22, and the footrest 23 form a four-bar linkage. The linear actuator drives the rear portion of the drive rod 31, causing the four-bar linkage to change shape, thereby enabling the footrest 23 to switch between the retracted and extended positions. In this case, because the front end of the drive rod 31 has a longer motion path than the middle portion, the motion path of the second footrest rod 22 can be longer than that of the first footrest rod 21. When the footrest 23 is in the extended position, the hinge point between the second footrest rod 22 and the footrest 23 can be located forward of the hinge point between the first footrest rod 21 and the footrest 23.

[0036] In this embodiment, the driving rod 31, the rear portion of the second footrest rod 22, the third footrest rod 24 and the seat frame 10 form a four-bar linkage, and the seat frame 10 is the fixed end of the four-bar linkage, thereby making the seat more stable during operation.

[0037] The seat frame 10 is provided with a second limiting post. When the footrest 23 is in the retracted position, the second limiting post engages with the third footrest rod 24 to keep the footrest 23 in the retracted position. The second limiting post prevents the footrest assembly 20 from being over-retracted, thereby improving the consistency of the left and right sides of the seat.

[0038] In other embodiments, the third footstool rod 24 may be hinged to the first footstool rod 21 and the second footstool rod 22 respectively to drive the first footstool rod 21 and the second footstool rod 22 to move.

[0039] As shown in FIG2 , when the footrest 23 is in the extended position, the hinge point between the first connecting rod 211 and the driving rod 31 is located in front of the connection point between the linear driving member and the driving rod 31 . The above structure has the advantage of easy connection.

[0040] As shown in FIG2 , the drive assembly 30 further includes a drive tube 32 and a transmission rod 33. The linear drive member extends in the front-to-back direction, and the drive tube 32 is perpendicular to the direction of motion of the linear drive member. The linear drive member is drivingly connected to the drive tube 32, causing the drive tube 32 to rotate about its own axis. The drive tube 32 is connected to the drive rod 31 via the transmission rod 33. With this arrangement, the transmission rod 33 transmits power from the drive tube 32 to the drive rod 31, thereby causing the drive rod 31 to rotate relative to the seat frame 10.

[0041] It should be noted that the linear drive member includes an electric push rod or a slider motor. In this embodiment, when the push rod of the electric push rod extends relative to the cylinder body, it drives the drive tube 32 to rotate counterclockwise, thereby driving the drive rod 31 to rotate counterclockwise relative to the seat frame 10.

[0042] In this embodiment, the transmission plate is a curved plate, and includes a first section and a second section that are arranged at an angle. The first section is connected to the driving tube 32 , and the second section is connected to the driving rod 31 .

[0043] Specifically, the seat frame includes two footrest assemblies 20, the seat frame 10 includes two seat frame plates, and the drive assembly 30 includes two drive rods 31 and two transmission rods 33. The two seat frame plates are spaced apart along the extension direction of the drive tube 32. The footrest assemblies 20 are hingedly connected to the corresponding seat frame plates via the drive rods 31. The ends of the drive tube 32 are respectively connected to corresponding transmission rods 33, and each transmission rod 33 is respectively connected to a corresponding drive rod 31. This arrangement creates a symmetrical structure on the left and right sides of the seat frame 10. Using a single linear drive member and drive tube 32, the footrest assemblies 20 on both sides of the seat can be moved simultaneously, achieving greater consistency between the left and right sides of the seat.

[0044] Two driving rods 31 are provided along the front-to-back direction of the seat frame 10 , and both ends of the linear driving member are connected to two driving tubes 32 respectively.

[0045] In this embodiment, when the footrest 23 is in the retracted position, it is retracted below the seat frame 10 and tilted, with the angle between the footrest 23 and the horizontal plane being between 20° and 25°. With this angle, the space below the seat frame 10 can be accessed through the bottom of the footrest 23 to clean the space below the seat frame 10.

[0046] Another embodiment of the present application provides a chair including the aforementioned seat frame. In this chair, since the drive rod 31 is hinged only to the seat frame 10 and the footrest assembly 20 is not linked to other structures of the seat frame, no major modifications to the linkage parts are required.

Claims

1. A seat bracket, characterized in that: The seat support comprises: seat frame (10); A footrest assembly (20) comprises a first footrest rod (21), a second footrest rod (22) and a footrest board (23), wherein the front ends of the first footrest rod (21) and the second footrest rod (22) are hinged to the footrest board (23) respectively; A drive assembly (30) comprising a linear drive member and a drive rod group, wherein a rear end of the drive rod group is hinged to the seat frame (10), and a front end of the drive rod group is hinged to the first footrest rod (21) and the second footrest rod (22), respectively, and the linear drive member is fixedly connected to the drive rod group to rotate the drive rod group; The footrest assembly (20) has a folded position in which the footrest (23) is retracted to the seat frame (10) and an extended position in which the footrest (23) is extended in front of the seat frame (10), and the linear drive member can drive the footrest (23) to switch between the folded position and the extended position through the drive rod group.

2. The seat bracket according to claim 1, characterized in that The first footstool rod (21) comprises a first connecting rod (211), a second connecting rod (212) and a third connecting rod (213) which are arranged in sequence from back to front. The rear end of the first connecting rod (211) is hinged to the driving rod group, the front end of the first connecting rod (211) is hinged to the rear end of the second connecting rod (212), the middle part of the second connecting rod (212) is hinged to the middle part of the second footstool rod (22), the front end of the second connecting rod (212) is hinged to the rear end of the third connecting rod (213), and the front end of the third connecting rod (213) is hinged to the footrest (23).

3. The seat bracket according to claim 2, characterized in that The first connecting rod (211) is located on the outside of the driving rod group, and the linear driving member is located on the inside of the driving rod group; and / or, When the footrest (23) is located at the extended position, the hinge point between the first connecting rod (211) and the driving rod group is located in front of the connection point between the linear drive member and the driving rod group.

4. The seat bracket according to claim 2, characterized in that A first limiting column (231) is provided on a side surface of the footrest (23), and when the footrest (23) is located in the extended position, the first limiting column (231) is in contact with the third connecting rod (213) to keep the footrest (23) in the extended position; and / or, The footrest (23) comprises a hinge plate (232) and a bearing plate (233) connected to each other, an angle being formed between the hinge plate (232) and the bearing plate (233), the third connecting rod (213) and the second footstool rod (22) being hinged to the hinge plate (232), and when the footrest (23) is located in the folded position, the second footstool rod (22) is in contact with the bearing plate (233) to keep the footrest (23) in the folded position.

5. The seat bracket according to claim 1, characterized in that The driving rod group comprises a driving rod (31) and a third footstool rod (24); the rear end of the driving rod (31) is hinged to the seat frame (10); the front end of the driving rod (31) is hinged to the first footstool rod (21) and the second footstool rod (22) respectively; the linear driving member is fixedly connected to the middle part of the driving rod (31); the rear end of the third footstool rod (24) is hinged to the seat frame (10); the front end of the third footstool rod (24) is hinged to the rear end of the second footstool rod (22); and the front end of the driving rod (31) is hinged to the middle part of the second footstool rod (22).

6. The seat support according to claim 5, characterized in that A second limiting column is provided on the seat frame (10). When the footrest (23) is located at the folded position, the second limiting column fits into the third footrest rod (24) to keep the footrest (23) at the folded position.

7. The seat support according to claim 5, characterized in that The drive assembly (30) further comprises a drive tube (32) and a transmission rod (33). The linear drive member extends in a front-to-rear direction. The drive tube (32) is perpendicular to the movement direction of the linear drive member. The linear drive member is connected to the drive tube (32) in a driving manner so that the drive tube (32) rotates around its own axis. The drive tube (32) is connected to the drive rod (31) or the third footstool rod (24) through the transmission rod (33).

8. The seat support according to claim 7, characterized in that The seat frame includes two footrest assemblies (20), the seat frame (10) includes two seat frame plates, the drive assembly (30) includes two drive rods (31) and two transmission rods (33), the two seat frame plates are spaced apart along the extension direction of the drive tube (32), the footrest assembly (20) is hinged to the corresponding seat frame plate through the drive rod (31), the two ends of the drive tube (32) are respectively connected to the corresponding transmission rod (33), and each transmission rod (33) is respectively connected to the corresponding drive rod (31).

9. The seat support according to claim 1, wherein: When the footrest (23) is located at the folded position, the footrest (23) is retracted to the bottom of the seat frame (10) and tilted, and the angle between the footrest (23) and the horizontal plane is between 20° and 25°.

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

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