Backrest folding assembly and seat

Abstract

The invention provides a backrest folding assembly and a seat. The backrest folding assembly comprises a fixing piece, an upper connecting rod, a lower connecting rod, a turning plate fixing piece, a middle connecting rod and a protective plate; one ends of the upper connecting rod and the lower connecting rod are rotationally connected with the fixing piece, and the other ends of the upper connecting rod and the lower connecting rod are rotationally connected with the turning plate fixing piece; and the protective plate is rotationally connected with the upper connecting rod and the middle connecting rod. The backrest folding assembly is unfolded and folded through rotary connection among the fixing piece, the upper connecting rod, the lower connecting rod and the turning plate fixing piece, the number of parts is small, and the manufacturing cost is low. Meanwhile, by arranging the middle connecting rod and the protection plate, the protection effect is achieved in the folding process of the backrest folding assembly, and safety is improved.

Description

Technical Field

[0001] The present application relates to the field of seating, and in particular to a backrest folding assembly and seating. Background Art

[0002] As people's living standards continue to improve, many different types of seats have appeared on the market. Seats may include furniture that provides rest, such as sofas, beds, chairs or office chairs. Traditional seats use a simple fixed connection between the backrest and the flap, which cannot be folded or adjusted in angle, limits the usage scenarios, and takes up a large amount of space. Existing seats use hydraulic systems or electric systems to fold the backrest folding assembly, but these designs make the structure of the backrest folding assembly complex, with a large number of parts and high manufacturing costs. At the same time, there is no protective plate on the backrest folding assembly of the seat, which can easily cause users to be pinched during the folding process of the backrest and the flap, and the safety is low.

[0003] Therefore, it is necessary to provide an improved backrest folding assembly and seat to solve the above problems. Summary of the invention

[0004] The present application provides a backrest folding assembly and a seat with low cost and high safety.

[0005] The present application provides a backrest folding assembly, including a fixing member, an upper connecting rod, a lower connecting rod, a flap fixing member, an intermediate connecting rod and a protective plate; one end of the upper connecting rod and the lower connecting rod are both rotatably connected to the fixing member, and the other end of the upper connecting rod and the lower connecting rod are both rotatably connected to the flap fixing member; the intermediate connecting rod is rotatably connected to the lower connecting rod, and the protective plate is rotatably connected to the upper connecting rod and the intermediate connecting rod.

[0006] Furthermore, the protective plate and the flap fixing member are respectively located at inner and outer sides of the upper connecting rod and the lower connecting rod, and the flipping directions of the protective plate and the flap fixing member are the same.

[0007] Furthermore, when unfolded, the flap fixing member and the bottom of the protective plate are lifted up and approach the fixing member, and the flap fixing member and the top of the protective plate are lifted up and away from the fixing member.

[0008] Furthermore, the protective plate is constructed so as to cover a gap enclosed by the upper connecting rod, the lower connecting rod and the flap fixing member when the backrest folding assembly is unfolded or folded.

[0009] Furthermore, the protective plate includes a top edge, a first side edge, a bottom edge and a second side edge connected in sequence, the top edge is arranged opposite to the bottom edge, the first side edge is arranged opposite to the second side edge; the length of the bottom edge is greater than the length of the top edge.

[0010] Furthermore, when the backrest folding assembly is unfolded, the first side edge is flush with the upper edge of the upper connecting rod, the second side edge is located below the upper connecting rod, the bottom edge is located in front of the fixing member, and the protective plate covers the upper part of the lower connecting rod; when the backrest folding assembly is folded, the first side edge is located in front of the fixing member, and the first side edge and the second side edge are respectively located on both sides of the upper connecting rod; the protective plate covers the flap fixing member.

[0011] Furthermore, the protective plate includes a first fixing portion, a second fixing portion and a first bending portion connecting the first fixing portion and the second fixing portion; the first fixing portion is rotatably connected to the upper connecting rod, and the connection point between the protective plate and the upper connecting rod is located on the first fixing portion; the second fixing portion is rotatably connected to the intermediate connecting rod, and the connection point between the protective plate and the intermediate connecting rod is located on the second fixing portion.

[0012] Furthermore, the flap fixing member includes a fixing portion and a connecting portion fixed together, the connecting portion is perpendicular to the fixing portion, and the connecting portion is rotatably connected to the upper connecting rod and the lower connecting rod respectively.

[0013] Furthermore, the intermediate connecting rod includes a first connecting portion, a second connecting portion and a second bending portion connecting the first connecting portion and the second connecting portion; the first connecting portion is rotatably connected to the lower connecting rod, and the connection point between the intermediate connecting rod and the lower connecting rod is located on the first connecting portion; the second connecting portion is rotatably connected to the second fixed portion, and the connection point between the protective plate and the intermediate connecting rod is located on the second connecting portion.

[0014] Furthermore, the lower connecting rod includes a first mounting portion, a second mounting portion and a main body portion connecting the first mounting portion and the second mounting portion; the first mounting portion is rotatably connected to the intermediate connecting rod and the flap fixing member respectively; the main body portion is arc-shaped, and the main body portion protrudes in a direction away from the upper connecting rod; the second mounting portion is rotatably connected to the bottom of the fixing member.

[0015] The present application also provides a seat, including a backrest assembly, a flap assembly and the above-mentioned backrest folding assembly, the fixing member is fixedly connected to the backrest assembly, and the flap fixing member is fixedly connected to the flap assembly.

[0016] Furthermore, when the backrest folding assembly is folded, the upper connecting rod, the lower connecting rod, the flap fixing member and the protective plate are folded between the side plate of the backrest assembly and the flap assembly, and are all arranged along the inclination direction of the side plate.

[0017] Furthermore, when the backrest folding assembly is unfolded, the edge of the protective plate fits against the front edge of the backrest assembly, and the protective plate and the backrest assembly together cover the gap formed by the fixing member and the upper connecting rod.

[0018] The present invention realizes the unfolding and folding of the backrest folding assembly by rotating the fixing member, the upper connecting rod, the lower connecting rod, the middle connecting rod, the flap fixing member and the protective plate, with a small number of parts and low manufacturing cost. At the same time, by providing the middle connecting rod and the protective plate, the backrest folding assembly plays a protective role in the folding process, thereby improving the safety of use. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a front view of the backrest folding assembly of the present application in the unfolded state.

[0020] Figure 2 yes Figure 1 A schematic diagram of another viewing angle of the backrest folding assembly is shown.

[0021] Figure 3 yes Figure 1 A side view of the folding backrest assembly is shown.

[0022] Figure 4 yes Figure 1 The schematic diagram shown is a folding backrest assembly without a protective plate.

[0023] Figure 5 yes Figure 1 The schematic diagram of the backrest folding assembly during the folding process is shown.

[0024] Figure 6 It is a front view of the backrest folding assembly of the present application in a folded state.

[0025] Figure 7 yes Figure 6 A schematic diagram of another viewing angle of the backrest folding assembly is shown.

[0026] Figure 8 yes Figure 6 A side view of the folding backrest assembly is shown.

[0027] Fig. 9 yes Figure 1 A schematic diagram of the lower link of the backrest folding assembly is shown.

[0028] Fig.10 yes Figure 1 A schematic diagram of the flap fixing member of the backrest folding assembly is shown.

[0029] Fig.11 yes Figure 1 A schematic diagram of the intermediate link of the backrest folding assembly is shown.

[0030] Fig.12 yes Figure 1 A schematic diagram of the protective plate of the folding backrest assembly is shown.

[0031] Fig.13 It is a schematic diagram of the seat of the present application when the flap is folded.

[0032] Fig.14 It is a schematic diagram of the seat of the present application when the flap is unfolded.

[0033] Description of Figure Numbers:

[0034] 100, backrest assembly; 101, side panel; 102, back panel; 103, storage space; 104, front edge; 200, flap assembly; 201, groove; 202, storage hole; 300, seat; 10, fixing member; 11, mounting hole; 12, first fixing hole; 13, second fixing hole; 20, upper connecting rod; 21, connecting hole; 22, connecting hole; 23, connecting hole; 30, lower connecting rod; 31, first mounting part; 311, first mounting hole; 312, second mounting hole; 32, main body; 33, second mounting part; 331, third mounting hole; 40, flap fixing member; 41, fixing part; 411, third fixing hole; 412, first Four fixing holes; 42, connecting part; 421, fourth mounting hole; 422, fifth mounting hole; 50, middle connecting rod; 51, first connecting part; 511, first through hole; 52, second connecting part; 521, second through hole; 53, second bending part; 60, protective plate; 601, first fixing part; 602, second fixing part; 603, first bending part; 604, third through hole; 605, fourth through hole; 61, top edge; 62, first side edge; 63, bottom edge; 64, second side edge; 70, connecting point; 71, connecting point; 72, connecting point; 73, connecting point; 74, connecting point; 75, connecting point; 76, connecting point; 77, connecting point. DETAILED DESCRIPTION

[0035] Here, the technical solutions in the embodiments (or "implementations") of the present application will be described clearly and completely in conjunction with the accompanying drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements.

[0036] If there are terms involving directional indications or positional relationships in the embodiments of the present application (such as up, down, left, right, front, back, inside, outside, top, bottom, center, vertical, horizontal, longitudinal, transverse, length, width, counterclockwise, clockwise, axial, radial, circumferential, etc.), such terms are only used to explain the relative positional relationship, movement, etc. between the components under a certain specific posture (as shown in the accompanying drawings); if the specific posture changes, the directional indication or positional relationship will also change accordingly. In addition, the terms "first", "second", etc. involved in the embodiments of the present application are only used for the purpose of convenience of description and cannot be understood as indicating or implying relative importance.

[0037] See also Figures 1 to 5 As shown, the backrest folding assembly includes a fixing member 10, an upper connecting rod 20, a lower connecting rod 30, a flap fixing member 40, an intermediate connecting rod 50 and a protective plate 60. One end of the upper connecting rod 20 and the lower connecting rod 30 are both rotatably connected to the fixing member 10, and the other end of the upper connecting rod 20 and the lower connecting rod 30 are both rotatably connected to the flap fixing member 40. The intermediate connecting rod 50 is rotatably connected to the lower connecting rod 30, and the protective plate 60 is rotatably connected to the upper connecting rod 20 and the intermediate connecting rod 50. A connection point 70 is formed between the fixing member 10, the upper connecting rod 20, the lower connecting rod 30, the flap fixing member 40, the intermediate connecting rod 50 and the protective plate 60.

[0038] The fixing member 10 is in the shape of a long straight rod, and a mounting hole 11 is provided on the fixing member 10. The number of the mounting holes 11 can be one or more. When the number of the mounting holes 11 is one, the mounting hole 11 needs to be a long strip mounting hole to limit the fixing member 10. When the number of the mounting holes 11 is multiple, the mounting hole 11 can be a round hole or a combination of a round hole and a long strip hole. The top and bottom of the fixing member 10 are respectively provided with a first fixing hole 12 and a second fixing hole 13.

[0039] The upper connecting rod 20 is in the shape of a long straight rod, and is provided with three connecting holes 21, 22, and 23. The connecting holes 21 and 23 are respectively located at the two ends of the upper connecting rod 20, and the connecting hole 22 is located between the connecting holes 21 and 23. The distance between the connecting holes 22 and 23 is smaller than the distance between the connecting holes 21 and 22. The upper connecting rod 20 is riveted to the top of the fixing member 10. The first fixing hole 12 is aligned with the connecting hole 21, and the rivet is assembled into the first fixing hole 12 and the connecting hole 21 to rivet the fixing member 10 and the upper connecting rod 20.

[0040] The fixing member 10 and the upper connecting rod 20 are in the shape of a long straight rod or a rod close to a long straight rod, so that when the backrest folding assembly is folded, the gap and angle between the fixing member 10 and the upper connecting rod 20 are smaller, and the space occupied is smaller. In addition, the fixing member 10 and the upper connecting rod 20 can also be set as a curved connecting rod or an arc connecting rod according to aesthetic or design requirements.

[0041] See also Fig. 9 As shown, the lower connecting rod 30 includes a first mounting portion 31, a second mounting portion 33, and a main body portion 32 connecting the first mounting portion 31 and the second mounting portion 33. The main body portion 32 is arc-shaped, and the main body portion 32 protrudes in a direction away from the upper connecting rod 20. The first mounting portion 31 is provided with a first mounting hole 311 and a second mounting hole 312. The second mounting portion 33 is provided with a third mounting hole 331. The second fixing hole 13 is aligned with the third mounting hole 331. Rivets are assembled to the second fixing hole 13 and the third mounting hole 331 to rivet the fixing member 10 and the second mounting portion 33.

[0042] See also Fig.10 As shown, the flap fixing member 40 includes a fixing portion 41 and a connecting portion 42 fixed together, and the connecting portion 42 is perpendicular to the fixing portion 41. The fixing portion 41 is provided with a third fixing hole 411 and a fourth fixing hole 412. The connecting portion 42 is provided with a fourth mounting hole 421 and a fifth mounting hole 422. The fourth mounting hole 421 is aligned with the second mounting hole 312. A rivet is assembled to the fourth mounting hole 421 and the second mounting hole 312 to rivet and fix the connecting portion 42 to the first mounting portion 31. The fifth mounting hole 422 is aligned with the connecting hole 23. A rivet is assembled to the fifth mounting hole 422 and the connecting hole 23 to rivet and fix the connecting portion 42 to the upper connecting rod 20.

[0043] See also Fig.11 As shown, the intermediate connecting rod 50 includes a first connecting portion 51, a second connecting portion 52, and a second bent portion 53 connecting the first connecting portion 51 and the second connecting portion 52. The first connecting portion 51 is provided with a first through hole 511, and the second connecting portion 52 is provided with a second through hole 521. The first through hole 511 is aligned with the first mounting hole 311. Rivets are assembled to the first through hole 511 and the first mounting hole 311 to rivet the first connecting portion 51 and the first mounting portion 31. The second connecting portion 52 is fixed to the protective plate 60.

[0044] See also Fig.12 As shown, the protective plate 60 includes a top edge 61, a first side edge 62, a bottom edge 63 and a second side edge 64 connected in sequence. The top edge 61 is disposed opposite to the bottom edge 63, and the first side edge 62 is disposed opposite to the second side edge 64. The length of the bottom edge 63 is greater than that of the top edge 61. The lengths of the first side edge 62 and the second side edge 64 are close and both are smooth curves.

[0045] The protective plate 60 includes a first fixing portion 601, a second fixing portion 602, and a first bent portion 603 connecting the first fixing portion 601 and the second fixing portion 602. The first fixing portion 601 is provided with a third through hole 604, and the third through hole 604 is aligned with the connecting hole 22. A rivet is assembled to the third through hole 604 and the connecting hole 22 to rivet the first fixing portion 601 and the upper connecting rod 20. The second fixing portion 602 is provided with a fourth through hole 605, and the fourth through hole 605 is aligned with the second through hole 521. A rivet is assembled to the fourth through hole 605 and the second through hole 521 to rivet the second fixing portion 602 and the second connecting portion 52.

[0046] The protective plate 60 is provided with the first bending portion 603. When viewed from the side of the backrest folding assembly, the first fixing portion 601 is parallel to the second fixing portion 602 with a gap therebetween. When the backrest folding assembly is folded, the protective plate 60 and the rivets provided on the lower connecting rod 30 will not generate friction or collision, thereby reducing noise and increasing service life.

[0047] The connection points 70 include connection points 71, 72, 73, 74, 75, 76, and 77. The upper connecting rod 20 is riveted to the first fixing portion 601 to form the connection point 71. The upper connecting rod 20 is riveted to the connecting portion 42 to form the connection point 72. The second fixing portion 602 is riveted to the second connecting portion 52 to form the connection point 73. The first connecting portion 51 is riveted to the first mounting portion 31 to form the connection point 74. The first mounting portion 31 is riveted to the connecting portion 42 to form the connection point 75. The top of the fixing member 10 is riveted to the upper connecting rod 20 to form the connection point 76. The bottom of the fixing member 10 is riveted to the second mounting portion 33 to form the connection point 77.

[0048] The connection point 71 is close to the connection point 72. The connection point 73 is located in the middle of the protection plate 60. The distance between the connection point 74 and the connection point 73 is close to the distance between the connection point 74 and the connection point 75. The connection point 72 and the connection point 75 are located at two ends of the connection portion 42, respectively.

[0049] Please also see Figures 6 to 8 As shown, when the backrest folding assembly is unfolded, the bottom of the flap fixing member 40 and the protective plate 60 are lifted and approached to the fixing member 10, and the top of the flap fixing member 40 and the protective plate 60 are lifted and away from the fixing member 10. The first side edge 62 is flush with the upper edge of the upper link 20, and the second side edge 64 is located below the upper link 20. The bottom edge 63 is located at the front side of the fixing member 10. The protective plate 60 covers the upper part of the lower link 30. The first side edge 62 is flush with the upper edge of the upper link 20, which means that the overall trend of the first side edge 62 is close to the upper edge of the upper link 20. In some embodiments, the first side edge 62 can be slightly higher or slightly lower than the upper edge of the upper link 20.

[0050] When the backrest folding assembly is folded, the bottom of the flap fixing member 40 and the protective plate 60 are lowered and away from the fixing member 10, and the top of the flap fixing member 40 and the protective plate 60 are lowered and close to the fixing member 10. The first side edge 62 is located at the front side of the fixing member 10, and the first side edge 62 and the second side edge 64 are respectively located at both sides of the upper connecting rod 20. The protective plate 60 covers the flap fixing member 40.

[0051] The flap fixing member 40 and the protective plate 60 are always located in front of the fixing member 10 during the folding process. The protective plate 60 and the flap fixing member 40 are located at the inner and outer sides of the upper connecting rod 20 and the lower connecting rod 30 respectively, and the flipping direction of the protective plate 60 and the flap fixing member 40 is the same. When the backrest folding assembly is unfolded or folded, the protective plate 60 can block the gap surrounded by the upper connecting rod 20, the lower connecting rod 30 and the flap fixing member 40.

[0052] See also Fig.13 and Fig.14 As shown, the present application also provides a seat, including a backrest assembly 100, a flap assembly 200, a seat 300 and the above-mentioned backrest folding assembly. The flap assembly 200 can be folded relative to the backrest assembly 100. The backrest assembly 100 is fixed to the seat 300, and the flap assembly 200 is located above the seat 300. The fixing member 10 is fixedly connected to the backrest assembly 100, and the flap fixing member 40 is fixedly connected to the flap assembly 200.

[0053] The backrest assembly 100 includes two side panels 101 and a back panel 102. The two side panels 101 are arranged opposite to each other and are fixed to the back panel 102. The two side panels 101 and the back panel 102 enclose a storage space 103. When the backrest folding assembly is folded, the flap assembly 200 and part of the backrest folding assembly are accommodated in the storage space 103, and the flap assembly 200 is parallel to the front edge 104 of the side panel 101. The upper connecting rod 20, the lower connecting rod 30, the flap fixing member 40 and the protective plate 60 are all arranged along the inclined direction of the side panel 101, that is, along the length direction of the front edge 104. The inclination angle of the upper connecting rod 20, the lower connecting rod 30, the flap fixing member 40 and the protective plate 60 in the folded state is close to the inclination angle of the side panel 101.

[0054] When the backrest folding assembly is unfolded, the flap assembly 200 and part of the backrest folding assembly protrude out of the accommodating space 103. The protective plate 60 is located at the front side of the side plate 101, and the bottom edge 63 is in contact with the front edge 104. The protective plate 60 and the side plate 101 together block the gap formed by the fixing member 10 and the upper connecting rod 20. The protective plate 60 generally blocks the gap surrounded by the side plate 101, the upper connecting rod 20 and the lower connecting rod 30.

[0055] A groove 201 is provided on the side of the flap assembly 200, and the fixing portion 41 is inserted into the groove 201. The thickness of the fixing portion 41 is less than or equal to the width of the groove 201. The width of the connecting portion 42 is less than or equal to the thickness of the flap assembly 200. Two storage holes 202 are provided on the flap assembly 200. When the flap assembly 200 is unfolded, the storage holes 202 are used for placing items such as water cups and tea cups. The number of storage holes 202 can also be one or more. The storage holes 202 can also be set as through holes or semi-enclosed holes.

[0056] The present application realizes the unfolding and folding of the backrest folding assembly by the rotational connection among the fixing member 10, the upper connecting rod 20, the lower connecting rod 30, the intermediate connecting rod 50, the flap fixing member 40 and the protective plate 60, with a small number of parts and low manufacturing cost. At the same time, by providing the intermediate connecting rod 50 and the protective plate 60, a protective effect is played during the folding process of the backrest folding assembly, preventing accidental pinching of the user and improving the safety of use.

[0057] It should be noted that the technical solutions or technical features described in the above embodiments can be combined or supplemented with each other without causing conflicts. The scope of protection of this application is not limited to the precise structures described in the above embodiments and shown in the drawings; all modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of this application should be included in the scope of protection of this application.

Claims

1. A backrest folding assembly, characterized in that: It includes a fixing part, an upper connecting rod, a lower connecting rod, a flap fixing part, an intermediate connecting rod and a protective plate; one end of the upper connecting rod and the lower connecting rod are both rotatably connected to the fixing part, and the other end of the upper connecting rod and the lower connecting rod are both rotatably connected to the flap fixing part; the intermediate connecting rod is rotatably connected to the lower connecting rod, and the protective plate is rotatably connected to the upper connecting rod and the intermediate connecting rod.

2. The backrest folding assembly according to claim 1, characterized in that: The protective plate and the flap fixing member are respectively located at inner and outer sides of the upper connecting rod and the lower connecting rod, and the flipping directions of the protective plate and the flap fixing member are the same.

3. The backrest folding assembly according to claim 1, characterized in that: When unfolded, the flap fixing piece and the bottom of the protective plate are lifted up and approach the fixing piece, and the flap fixing piece and the top of the protective plate are lifted up and away from the fixing piece.

4. The backrest folding assembly according to claim 1, characterized in that: The protective plate is constructed so as to cover a gap formed by the upper connecting rod, the lower connecting rod and the flap fixing member when the backrest folding assembly is unfolded or folded.

5. The backrest folding assembly according to claim 4, characterized in that: The protective plate includes a top edge, a first side edge, a bottom edge and a second side edge connected in sequence, the top edge is arranged opposite to the bottom edge, the first side edge is arranged opposite to the second side edge; the length of the bottom edge is greater than the length of the top edge.

6. The backrest folding assembly according to claim 5, characterized in that: When the backrest folding assembly is unfolded, the first side edge is flush with the upper edge of the upper connecting rod, the second side edge is located below the upper connecting rod, the bottom edge is located in front of the fixing member, and the protective plate covers the upper part of the lower connecting rod; when the backrest folding assembly is folded, the first side edge is located in front of the fixing member, and the first side edge and the second side edge are respectively located on both sides of the upper connecting rod; the protective plate covers the flap fixing member.

7. The backrest folding assembly according to claim 1, characterized in that: The protective plate includes a first fixing portion, a second fixing portion and a first bending portion connecting the first fixing portion and the second fixing portion; the first fixing portion is rotatably connected to the upper connecting rod, and the connection point between the protective plate and the upper connecting rod is located on the first fixing portion; the second fixing portion is rotatably connected to the intermediate connecting rod, and the connection point between the protective plate and the intermediate connecting rod is located on the second fixing portion.

8. The backrest folding assembly according to claim 1, characterized in that: The flap fixing member includes a fixing portion and a connecting portion fixed together, the connecting portion is perpendicular to the fixing portion, and the connecting portion is rotatably connected to the upper connecting rod and the lower connecting rod respectively.

9. The backrest folding assembly according to claim 7, characterized in that: The intermediate connecting rod includes a first connecting portion, a second connecting portion and a second bending portion connecting the first connecting portion and the second connecting portion; the first connecting portion is rotatably connected to the lower connecting rod, and the connection point between the intermediate connecting rod and the lower connecting rod is located on the first connecting portion; the second connecting portion is rotatably connected to the second fixed portion, and the connection point between the protective plate and the intermediate connecting rod is located on the second connecting portion.

10. The backrest folding assembly according to claim 1, characterized in that: The lower connecting rod includes a first mounting portion, a second mounting portion and a main body portion connecting the first mounting portion and the second mounting portion; the first mounting portion is rotatably connected to the intermediate connecting rod and the flap fixing member respectively; the main body portion is arc-shaped, and the main body portion protrudes in a direction away from the upper connecting rod; the second mounting portion is rotatably connected to the bottom of the fixing member.

11. A seat, characterized in that: It comprises a backrest assembly, a flap assembly and a backrest folding assembly as claimed in any one of claims 1 to 10, wherein the fixing member is fixedly connected to the backrest assembly, and the flap fixing member is fixedly connected to the flap assembly.

12. The sitting device according to claim 11, characterized in that: When the backrest folding assembly is folded, the upper connecting rod, the lower connecting rod, the flap fixing member and the protective plate are folded between the side plate of the backrest assembly and the flap assembly, and are all arranged along the inclination direction of the side plate.

13. The seat according to claim 12, characterized in that: When the backrest folding assembly is unfolded, the edge of the protective plate is in contact with the front edge of the backrest assembly, and the protective plate and the backrest assembly together cover the gap formed by the fixing member and the upper connecting rod.

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