Seat

Abstract

The invention discloses a seat. The seat comprises a chassis; the base is arranged on the upper side of the chassis, and the base is provided with a first pivoting part; the base is connected with the chassis through the connecting rod assembly, so that the base can move relative to the chassis; the backrest is arranged on the rear side of the base, the lower end of the backrest is rotatably connected with the chassis around a first axis extending left and right, and the backrest is provided with a second pivoting part; one end of the linkage rod is rotationally connected with the first pivoting part, and the other end of the linkage rod is rotationally connected with the second pivoting part. According to the seat, the base can be driven to move synchronously when the backrest rotates, so that linkage of the backrest and the seat can be effectively achieved, the situation that clothes on the back of a user are pulled when the backrest rotates is avoided, the comfort of the seat is effectively improved, and then the use experience of the user is effectively improved.

Description

Technical Field

[0001] The invention relates to the technical field of seats, and in particular to a seat. Background Art

[0002] As people's living standards improve, their quality of life requirements are getting higher and higher. Traditional wooden chairs, bamboo chairs, etc. are gradually being replaced by chairs with beautiful styles and diverse functions. The design of chairs is also becoming more and more humanized. The purpose of their design is mostly to make consumers more comfortable and convenient to use, so as to meet the different needs of consumers.

[0003] In the prior art, the backrest of the chair is designed to be rotatable, and the user can adjust the rotation angle of the chair to meet different usage requirements. However, the base of such chairs is often fixed and immovable. Since the rotation center and rotation radius of the chair back are different from the rotation center and rotation radius of the human back, the backrest will pull the clothes on the user's back upwards under the action of friction, thereby reducing the user's comfort and affecting the user experience. Summary of the invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention is to provide a chair, wherein the backrest can drive the base to move synchronously when the backrest rotates, thereby effectively realizing the linkage between the backrest and the chair, avoiding pulling the clothes on the back of the user when the backrest rotates, thereby effectively improving the comfort of the chair, and further effectively improving the user experience.

[0005] The seat according to the present invention includes: a chassis; a base, which is arranged on the upper side of the chassis and is provided with a first pivot; a connecting rod assembly, through which the base is connected to the chassis so as to be movable relative to the chassis; a backrest, which is arranged on the rear side of the base, the lower end of the backrest is rotatably connected to the chassis around a first axis extending left and right, and the backrest is provided with a second pivot; a linkage rod, one end of the linkage rod is rotatably connected to the first pivot and the other end is rotatably connected to the second pivot.

[0006] According to the seat of the present invention, a chassis, a base, a connecting rod assembly, a backrest and a linkage rod are arranged in the seat, the base is arranged on the upper side of the chassis, the base is provided with a first pivot part, the base is connected to the chassis through the connecting rod assembly so as to be movable relative to the chassis, the backrest is arranged on the rear side of the base, the lower end of the backrest is rotatably connected to the first axis extending left and right around the chassis, the backrest is provided with a second pivot part, one end of the linkage rod is rotatably connected to the first pivot part and the other end is rotatably connected to the second pivot part, so that the backrest can drive the base to move synchronously when it rotates, so that the linkage between the backrest and the seat can be effectively realized, and the clothes on the user's back are avoided from being pulled when the backrest rotates, thereby effectively improving the comfort of the seat, and then effectively improving the user's experience.

[0007] In some embodiments, the seat further comprises: a bottom plate, which is disposed on the chassis and is movable relative to the chassis, and the connecting rod assembly is connected between the bottom plate and the base.

[0008] In some embodiments, the backrest is provided with a third pivot portion spaced apart from the second pivot portion, the rear end of the base plate is rotatably connected to the third pivot portion, and the seat further includes: a first connecting rod, one end of the first connecting rod is rotatably connected to the front end of the base plate, and the other end of the first connecting rod is rotatably connected to the chassis.

[0009] In some embodiments, the first axis, the second pivot portion and the third pivot portion are arranged at intervals in the front-to-back direction, the first axis is located at the front side of the third pivot portion, and the second pivot portion is located at the rear side of the third pivot portion.

[0010] In some embodiments, the backrest includes: a backrest body and a connecting portion, the backrest body extends up and down, the connecting portion is connected to the lower end of the backrest body and extends forward, wherein the front end of the connecting portion is rotatably connected to the chassis around the first axis, the third pivot portion is formed on the connecting portion and extends upward, and the second pivot portion is formed at the lower end of the backrest body and extends forward.

[0011] In some embodiments, the connecting rod assembly includes a plurality of second connecting rods arranged at intervals, one end of the plurality of second connecting rods is rotatably connected to the base, and the other end of the plurality of second connecting rods is rotatably connected to the bottom plate.

[0012] In some embodiments, a plurality of the second connecting rods are symmetrically arranged on the left and right sides of the bottom plate.

[0013] In some embodiments, a first axial hole is formed at the upper end of the first link and passes through the first link in the left-right direction, a second axial hole is formed at the lower end of the second link and passes through the second link in the left-right direction, and a third axial hole is formed at the front end of the base plate and passes through the base plate in the left-right direction. The seat also includes: a pivot shaft, which is passed through the first axial hole, the second axial hole of the second link arranged on the left and right sides of the front end of the base plate, and the third axial hole, so that the first link and the second link are rotatably connected to the base plate around the pivot shaft.

[0014] In some embodiments, a first limiting portion is provided on the chassis, and a second limiting portion is provided on the backrest, and the first limiting portion cooperates with the second limiting portion to limit the rotation angle of the backrest relative to the chassis.

[0015] In some embodiments, one of the first limiting portion and the second limiting portion is formed as a limiting column and the other is formed as a limiting hole, the limiting hole extends in an arc shape around the first axis, and the limiting column can be slidably fitted in the limiting hole.

[0016] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic diagram of a seat according to an embodiment of the present invention;

[0018] Figure 2 is a schematic diagram of a chassis according to an embodiment of the present invention;

[0019] Figure 3 is a schematic diagram of a base according to an embodiment of the present invention;

[0020] Figure 4 is a schematic diagram of a connecting rod assembly according to an embodiment of the present invention;

[0021] Figure 5 is a schematic diagram of a backrest according to an embodiment of the present invention;

[0022] Figure 6 is a schematic diagram of a linkage rod according to an embodiment of the present invention;

[0023] Figure 7 is a schematic diagram of a base plate according to an embodiment of the present invention;

[0024] Figure 8 is a schematic diagram of a first connecting rod according to an embodiment of the present invention.

[0025] Reference numerals:

[0026] 100. Seat;

[0027] 10. chassis; 11. fourth through hole; 12. second rotating connection portion; 121. fifth connection hole; 13. limiting hole;

[0028] 20. base; 21. first pivoting portion; 211. first connecting hole; 22. seat plate; 23. first rotating connecting portion; 231. sixth connecting hole;

[0029] 30. connecting rod assembly; 31. second connecting rod; 311. sixth through hole; 312. second shaft hole;

[0030] 40. backrest; 41. backrest body; 411. second pivoting portion; 4111. second connecting hole; 42. connecting portion; 421. third pivoting portion; 4211. third connecting hole; 422. first side plate; 4221. fourth connecting hole; 4222. seventh connecting hole;

[0031] 50. linkage rod; 51. first through hole; 52. second through hole;

[0032] 60, bottom plate; 61, third through hole; 62, third rotating connection portion; 621, third shaft hole; 63, seventh through hole;

[0033] 70. First connecting rod; 71. Fifth through hole; 72. First shaft hole. DETAILED DESCRIPTION

[0034] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0035] Reference below Figure 1-Figure 8 A seat 100 according to an embodiment of the present invention is described.

[0036] like Figure 1-Figure 6 As shown, the seat 100 according to the embodiment of the present invention includes: a chassis 10 , a base 20 , a connecting rod assembly 30 , a backrest 40 and a linkage rod 50 .

[0037] The base 20 is arranged on the upper side of the chassis 10, and the base 20 is provided with a first pivot portion 21; the base 20 is connected to the chassis 10 through a connecting rod assembly 30 so as to be movable relative to the chassis 10; the backrest 40 is arranged on the rear side of the base 20, and the lower end of the backrest 40 is rotatably connected to the first axis extending left and right around the chassis 10, and the backrest 40 is provided with a second pivot portion 411; one end of the linkage rod 50 is rotatably connected to the first pivot portion 21 and the other end is rotatably connected to the second pivot portion 411.

[0038] In a specific example, if Figure 1 and Figure 3 As shown, the base 20 is also provided with a seat plate 22 and a first rotating connection part 23. The seat plate 22 is in the shape of a plate, and the front end of the seat plate 22 extends along an arc line forward and downward. The first rotating connection part 23 is fixedly connected to the lower side surface of the bottom plate 60. The upper end of the connecting rod assembly 30 is movably connected to the first rotating connection part 23, and the lower end of the connecting rod assembly 30 is movably connected to the chassis 10, so that the base 20 can move relative to the chassis 10.

[0039] Furthermore, if Figure 1 and Figure 3 As shown, the first pivot portion 21 is fixedly connected to the lower side surface of the rear end of the seat plate 22, and the first pivot portion 21 is arranged on the rear side of the connecting rod assembly 30, and the first pivot portion 21 is provided with a first connecting hole 211 penetrating the first pivot portion 21 along the left-right direction, and the second pivot portion 411 is provided with a second connecting hole 4111 penetrating the second pivot portion 411 along the left-right direction, and the front and rear ends of the linkage rod 50 are respectively provided with a first through hole 51 and a second through hole 52 penetrating the linkage rod 50 along the left-right direction, and the seat 100 is also provided with a first rotating shaft and a second rotating shaft, the first rotating shaft is penetrated in the first connecting hole 211 and the first through hole 51, and the second rotating shaft is penetrated in the second connecting hole 4111 and the second through hole 52, thereby, the linkage rod 50 can be rotatably connected to the base 20 and the linkage rod 50 can be rotatably connected to the backrest 40.

[0040] In a specific example, if Figure 1 and Figure 3 As shown, a fourth connection hole 4221 is provided at the lower end of the backrest 40, and a fourth through hole 11 is correspondingly provided on the chassis 10, the fourth connection hole 4221 penetrates the lower end of the backrest 40 in the left-right direction, and the fourth through hole 11 penetrates the chassis 10 in the left-right direction, and a fourth rotating shaft is further provided in the seat 100, and the fourth rotating shaft penetrates the fourth connection hole 4221 and the fourth through hole 11, thereby enabling the backrest 40 to be rotatably connected to the chassis 10. Among them, the axis of the fourth rotating shaft coincides with the first axis.

[0041] When the user adjusts the backrest 40 so that the backrest 40 rotates around the first axis extending left and right, the backrest 40 can drive the linkage rod 50 to move, and the movement of the linkage rod 50 can drive the base 20 to move. Since the base 20 is rotatably connected to the chassis 10 through the connecting rod assembly 30, the base 20 can move relative to the chassis 10 driven by the linkage rod 50. Therefore, the rotation of the backrest 40 can drive the base 20 to move, thereby effectively realizing the linkage between the base 20 and the backrest 40.

[0042] It should be noted that, for seats in the prior art, since the rotation center and rotation radius of the chair back are different from the rotation center and rotation radius of the human back, when the user turns the backrest while sitting on the chair, relative movement will occur between the user's back and the backrest. Under the action of friction, the backrest will pull the clothes on the user's back upwards, thereby reducing the comfort of the seat.

[0043] In this embodiment, when the user sits on the seat 100 and turns the backrest 40 backward, the backrest 40 can drive the linkage rod 50 to move toward the rear and downward direction, and the linkage rod 50 can drive the base 20 to move toward the rear and downward direction, so that the movement of the backrest 40 and the base 20 is as consistent as possible, thereby effectively reducing the relative movement between the user's back and the backrest 40; when the user sits on the seat 100 and turns the backrest 40 forward, the backrest 40 can drive the linkage rod 50 to move toward the front and upward direction, and the linkage rod 50 can drive the base 20 to move toward the front and upward direction, so that the movement of the backrest 40 and the base 20 is as consistent as possible, thereby effectively reducing the relative movement between the user's back and the backrest 40.

[0044] As a result, the backrest 40 and the base 20 of the seat 100 can move synchronously, thereby effectively realizing the linkage between the seat 100 and the backrest 40, so that the seat 100 can actively adapt to changes in the sitting posture of the human body and comply with ergonomic principles, thereby avoiding the backrest 40 of the seat 100 from pulling the user's back clothes, thereby effectively improving the comfort of the seat 100.

[0045] According to the seat 100 of the embodiment of the present invention, a chassis 10, a base 20, a connecting rod assembly 30, a backrest 40 and a linkage rod 50 are arranged in the seat 100, the base 20 is arranged on the upper side of the chassis 10, the base 20 is provided with a first pivot portion 21, the base 20 is connected to the chassis 10 through the connecting rod assembly 30 so as to be movable relative to the chassis 10, the backrest 40 is arranged on the rear side of the base 20, the lower end of the backrest 40 is rotatably connected to the first axis extending left and right around the chassis 10, the backrest 40 is provided with a second pivot portion 411, one end of the linkage rod 50 is rotatably connected to the first pivot portion 21 and the other end is rotatably connected to the second pivot portion 411, so that when the backrest 40 rotates, it can drive the base 20 to move synchronously, so that the linkage between the backrest 40 and the seat 100 can be effectively realized, and the clothes on the user's back are prevented from being pulled when the backrest 40 rotates, thereby effectively improving the comfort of the seat 100, and further effectively improving the user experience.

[0046] In one embodiment of the present invention, Figure 1 and Figure 7 As shown, the seat 100 further includes: a bottom plate 60, which is disposed on the chassis 10 and is movable relative to the chassis 10, and the connecting rod assembly 30 is connected between the bottom plate 60 and the base 20. In a specific example, as shown in FIG. Figure 1 and Figure 7 As shown, the bottom plate 60 is disposed on the upper side of the chassis 10 , and the connecting assembly is disposed on the upper side of the chassis 10 and located on the lower side of the base 20 .

[0047] Furthermore, if Figure 1As shown, the lower end of the connecting rod assembly 30 is movably connected to the bottom plate 60, that is, the base 20 is movably connected to the bottom plate 60 through the connecting rod assembly 30, and the base 20 can move relative to the bottom plate 60. In addition, the bottom plate 60 is movably connected to the chassis 10, that is, the bottom plate 60 can move relative to the chassis 10.

[0048] When the backrest 40 rotates, the backrest 40 drives the base 20 to move through the linkage rod 50, and the base 20 drives the bottom plate 60 to move through the connecting rod assembly 30. Therefore, the arrangement of the bottom plate 60 can provide an additional adjustment level for the seat 100, so that the seat 100 can respond more flexibly to changes in the user's sitting posture. In this embodiment, the bottom plate 60 is arranged in the seat 100, and the bottom plate 60 is arranged on the chassis 10 and is movable relative to the chassis 10. The connecting rod assembly 30 is connected between the bottom plate 60 and the base 20, which can effectively improve the flexibility and adaptability of the seat 100.

[0049] In one embodiment of the present invention, Figure 1 , Figure 2 , Figure 5 and Figure 8 As shown, the backrest 40 is provided with a third pivot portion 421 spaced apart from the second pivot portion 411, the rear end of the base plate 60 is rotatably connected to the third pivot portion 421, and the seat 100 also includes: a first connecting rod 70, one end of the first connecting rod 70 is rotatably connected to the front end of the base plate 60, and the other end of the first connecting rod 70 is rotatably connected to the chassis 10.

[0050] In a specific example, if Figure 1 and Figure 5 As shown, the third pivot portion 421 is arranged on the backrest 40 and is spaced apart from the second pivot portion 411 in the front-to-rear direction. Further, the third pivot portion 421 is arranged on the rear side of the connecting rod assembly 30. The third pivot portion 421 is provided with a third connecting hole 4211 which passes through the third pivot portion 421 along the left-right direction. The rear end of the base plate 60 is provided with a third through hole 61 which passes through the base plate 60 along the left-right direction. A third rotating shaft is also provided in the seat 100. The third rotating shaft passes through the third connecting hole 4211 and the third through hole 61, thereby enabling the base plate 60 to be rotatably connected to the backrest 40.

[0051] In a specific example, if Figure 1 , Figure 2 and Figure 8As shown, the upper end of the first connecting rod 70 is rotatably connected to the front end of the base plate 60, the lower end of the first connecting rod 70 is provided with a fifth through hole 71 penetrating the first connecting rod 70 along the left-right direction, the upper side of the front end of the chassis 10 is provided with a second rotating connecting part 12, the second rotating connecting part 12 is provided with a fifth connecting hole 121 penetrating the second rotating connecting part 12 along the left-right direction, and a fifth rotating shaft is also provided in the seat 100, the fifth rotating shaft is penetrated through the fifth connecting hole 121 and the fifth through hole 71, thereby, the first connecting rod 70 can be rotatably connected to the chassis 10.

[0052] In this embodiment, by providing a third pivoting portion 421 spaced apart from the second pivoting portion 411 on the backrest 40, the rear end of the bottom plate 60 is rotatably connected to the third pivoting portion 421, and a first connecting rod 70 is provided in the seat 100, one end of the first connecting rod 70 is rotatably connected to the front end of the bottom plate 60, and the other end of the first connecting rod 70 is rotatably connected to the chassis 10, which can provide a stable support point for the rotation of the bottom plate 60, thereby effectively improving the stability and reliability of the bottom plate 60. In addition, the backrest 40 can drive the bottom plate 60 to move, thereby driving the base 20 to move, thereby further ensuring the reliability of the linkage between the backrest 40 and the base 20.

[0053] In one embodiment of the present invention, Figure 1 As shown, the first axis, the second pivot portion 411 and the third pivot portion 421 are arranged at intervals in the front-to-back direction, the first axis is located at the front side of the third pivot portion 421, and the second pivot portion 411 is located at the rear side of the third pivot portion 421. In other words, the first axis is located at the frontmost position, the third pivot portion 421 is located in the middle position, and the second pivot portion 411 is located at the rearmost position.

[0054] In a specific example, if Figure 1 As shown, the lower end of the backrest 40 is connected to the chassis 10 via a first axis, so that the backrest 40 can rotate relative to the chassis 10 around the first axis extending left and right. The rear end of the bottom plate 60 is rotatably connected to the third pivot portion 421, so that the rotation of the backrest 40 can drive the bottom plate 60 to move, and then drive the base 20 to move. The backrest 40 is rotatably connected to the linkage rod 50 via the second pivot portion 411, and the linkage rod 50 is rotatably connected to the base 20 via the first pivot portion 21, so that the rotation of the backrest 40 can drive the base 20 to move.

[0055] This embodiment can effectively optimize the structural layout of the seat 100 by arranging the first axis, the second pivot part 411 and the third pivot part 421 in an alternate arrangement in the front-to-back direction, with the first axis located in front of the third pivot part 421 and the second pivot part 411 located in the rear of the third pivot part 421, thereby effectively ensuring the coordinated movement between the backrest 40, the base 20 and the bottom plate 60, reducing mechanical interference, and thus effectively improving the overall linkage efficiency of the seat 100.

[0056] In one embodiment of the present invention, Figure 1 and Figure 5 As shown, the backrest 40 includes: a backrest 40 main body and a connecting portion 42, the backrest 40 main body extends up and down, the connecting portion 42 is connected to the lower end of the backrest 40 main body and extends forward, wherein the front end of the connecting portion 42 is rotatably connected to the chassis 10 around a first axis, a third pivot portion 421 is formed on the connecting portion 42 and extends upward, and a second pivot portion 411 is formed at the lower end of the backrest 40 main body and extends forward.

[0057] In a specific example, if Figure 1 and Figure 5 As shown, the lower end of the backrest 40 body is connected to the rear end of the connecting portion 42, the backrest 40 body can provide back support for the user, and the connecting portion 42 can connect the backrest 40 body to the chassis 10. The front end of the connecting portion 42 is provided with two first side plates 422, and the two first side plates 422 are spaced and symmetrically arranged in the left-right direction.

[0058] Further, the fourth connection hole 4221 is provided on the first side plate 422, the fourth connection hole 4221 penetrates the first side plate 422 in the left-right direction, the rear end of the chassis 10 extends between the two first side plates 422, and the fourth through hole 11 on the chassis 10 is aligned with the fourth connection hole 4221 on the first side plate 422 in the left-right direction, and the fourth shaft is passed through the fourth connection hole 4221 and the fourth through hole 11, thereby enabling the backrest 40 to be rotatably connected to the chassis 10 around the axis of the fourth shaft. The axis of the fourth shaft coincides with the first axis.

[0059] In this embodiment, a backrest 40 main body and a connecting portion 42 are provided in the backrest 40. The backrest 40 main body extends up and down, and the connecting portion 42 is connected to the lower end of the backrest 40 main body and extends forward, wherein the front end of the connecting portion 42 is rotatably connected to the chassis 10 around a first axis, a third pivot portion 421 is formed on the connecting portion 42 and extends upward, and a second pivot portion 411 is formed at the lower end of the backrest 40 main body and extends forward, which can optimize the structural structure of the backrest 40 and make the connection between the second pivot portion 411 and the third pivot portion 421 and the backrest 40 more reasonable, thereby effectively improving the structural strength and durability of the backrest 40.

[0060] In one embodiment of the present invention, Figure 1 and Figure 4 As shown, the connecting rod assembly 30 includes a plurality of second connecting rods 31 arranged at intervals, one end of the plurality of second connecting rods 31 is rotatably connected to the base 20, and the other end of the plurality of second connecting rods 31 is rotatably connected to the bottom plate 60. For example, the number of the second connecting rods 31 can be four, six, eight, ten, or more than twelve.

[0061] In a specific example, if Figure 1 and Figure 4 As shown, the number of the second connecting rods 31 is four, and the plurality of second connecting rods 31 are arranged at intervals, and the plurality of second connecting rods 31 correspond to the plurality of first rotating connecting parts 23 one by one. Further, the first rotating connecting part 23 is provided with a sixth connecting hole 231 penetrating the first rotating connecting part 23 in the left-right direction, and the upper end of the second connecting rod 31 is provided with a sixth through hole 311 penetrating the second connecting rod 31 in the left-right direction. The seat 100 is also provided with a sixth rotating shaft, and the sixth rotating shaft is penetrated in the sixth connecting hole 231 and the sixth through hole 311.

[0062] Thus, the plurality of second connecting rods 31 can be rotatably connected to the base 20. Since the lower ends of the plurality of second connecting rods 31 are rotatably connected to the bottom plate 60, the base 20 can move relative to the bottom plate 60. Furthermore, since the bottom plate 60 is disposed on the chassis 10 and is movable relative to the chassis 10, the base 20 can move relative to the chassis 10.

[0063] In this embodiment, a plurality of second links 31 are arranged at intervals in the link assembly 30, one end of the plurality of second links 31 is rotatably connected to the base 20, and the other end of the plurality of second links 31 is rotatably connected to the bottom plate 60. This not only effectively simplifies the structural construction of the link assembly 30, but also enables the plurality of second links 31 to work in coordination to effectively ensure precise synchronous movement between the base 20 and the bottom plate 60, thereby effectively improving the response speed of the overall linkage function of the seat 100.

[0064] In one embodiment of the present invention, Figure 1 and Figure 4 As shown, a plurality of second connecting rods 31 are symmetrically arranged on the left and right sides of the bottom plate 60. In a specific example, as shown in FIG. Figure 1 and Figure 4 As shown, the number of the second connecting rods 31 is four, and the plurality of second connecting rods 31 are arranged at intervals. Furthermore, the plurality of second connecting rods 31 are arranged symmetrically in the left-right direction.

[0065] This embodiment can effectively ensure that the base 20 and the base 60 are evenly stressed in the left and right directions by symmetrically arranging the plurality of second connecting rods 31 on the left and right sides of the base 60, thereby avoiding the tilt or instability caused by uneven stress on one side of the seat 100, thereby improving the smoothness and comfort of the operation of the seat 100. In addition, it can also avoid the stress concentration caused by uneven stress on the base 20 and the base 60, thereby effectively improving the service life of the seat 100.

[0066] In one embodiment of the present invention, Figure 1 , Figure 4 , Figure 7 and Figure 8 As shown, the upper end of the first connecting rod 70 is formed with a first axial hole 72 that passes through the first connecting rod 70 along the left-right direction, the lower end of the second connecting rod 31 is formed with a second axial hole 312 that passes through the second connecting rod 31 along the left-right direction, and the front end of the bottom plate 60 is formed with a third axial hole 621 that passes through the bottom plate 60 along the left-right direction. The seat 100 also includes: a pivot shaft, which is passed through the first axial hole 72, the second axial hole 312 of the second connecting rod 31 arranged on the left and right sides of the front end of the bottom plate 60, and the third axial hole 621, so that the first connecting rod 70 and the second connecting rod 31 are rotatably connected to the bottom plate 60 around the pivot shaft.

[0067] In a specific example, if Figure 7 As shown, a third rotating connection part 62 is provided at the front end of the base plate 60. The number of the third rotating connection parts 62 is two, and the two third rotating connection parts 62 are arranged at intervals in the left-right direction. Furthermore, a third axial hole 621 is formed on the third rotating connection part 62 and passes through the third rotating connection part 62 along the left-right direction.

[0068] For example Figure 1 As shown, the front end of the base plate 60 is arranged between the two second connecting rods 31 on the front side, that is, the two third rotating connecting parts 62 are arranged between the two second connecting rods 31 on the front side, and the second axial hole 312 is aligned with the third axial hole 621 in the left-right direction, and the upper end of the first connecting rod 70 extends between the two third rotating connecting parts 62, and the first axial hole 72 is aligned with the third axial hole 621 in the left-right direction.

[0069] That is to say, the first axis hole 72, the second axis hole 312 and the third axis hole 621 are aligned in the left-right direction, and the pivot axis is passed through the first axis hole 72, the second axis hole 312 of the second connecting rod 31 arranged on the left and right sides of the front end of the base plate 60, and the third axis hole 621, which not only enables the first connecting rod 70 to be rotatably connected to the base plate 60 around the pivot axis, but also enables the second connecting rod 31 to be rotatably connected to the base plate 60 around the pivot axis.

[0070] In a specific example, if Figure 7As shown, the bottom plate 60 is further provided with a seventh through hole 63 which passes through the bottom plate 60 in the left-right direction, and the second axial holes 312 at the lower ends of the two second connecting rods 31 at the rear side are respectively aligned with the seventh through hole 63 in the left-right direction. The seat 100 is also provided with a seventh rotating shaft, which passes through the seventh through hole 63 and the second axial holes 312 at the lower ends of the two second connecting rods 31 at the rear side, so that the two second connecting rods 31 at the rear side can rotate relative to the bottom plate 60.

[0071] In this embodiment, a first axial hole 72 is formed at the upper end of the first link 70, which passes through the first link 70 in the left-right direction, a second axial hole 312 is formed at the lower end of the second link 31, which passes through the second link 31 in the left-right direction, and a third axial hole 621 is formed at the front end of the base plate 60, which passes through the base plate 60 in the left-right direction. A pivot shaft is provided in the seat 100, and the pivot shaft passes through the first axial hole 72, the second axial hole 312 of the second link 31 arranged on the left and right sides of the front end of the base plate 60, and the third axial hole 621, so that the first link 70 and the second link 31 are rotatably connected to the base plate 60 around the pivot shaft, which can effectively reduce the mechanical wear and noise between the first link 70 and the second link 31 and the base plate 60, thereby effectively improving the reliability and durability of the seat 100.

[0072] In one embodiment of the present invention, Figure 1 As shown, the chassis 10 is provided with a first limiting portion, and the backrest 40 is provided with a second limiting portion, and the first limiting portion and the second limiting portion are limitedly matched to limit the rotation angle of the backrest 40 relative to the chassis 10. In other words, the first limiting portion on the chassis 10 and the second limiting portion on the backrest 40 are limitedly matched with each other, so as to limit the rotation angle of the backrest 40 relative to the chassis 10, and prevent the backrest 40 from rotating too much.

[0073] In this embodiment, a first limiting portion is provided on the chassis 10 and a second limiting portion is provided on the backrest 40. The first limiting portion cooperates with the second limiting portion to limit the rotation angle of the backrest 40 relative to the chassis 10. This can prevent the backrest 40 from rotating too much, thereby preventing the seat 100 from being damaged due to the excessive rotation angle, thereby effectively ensuring the safety and reliability of the seat 100.

[0074] In one embodiment of the present invention, Figure 1 , Figure 2 and Figure 5 As shown, one of the first limiting portion and the second limiting portion is formed as a limiting column and the other is formed as a limiting hole 13 . The limiting hole 13 extends in an arc shape around the first axis, and the limiting column can be slidably fitted in the limiting hole 13 .

[0075] For example, a limiting column is formed on the first limiting portion, and a limiting hole 13 is formed on the second limiting portion; for another example, a limiting hole 13 is formed on the first limiting portion, and a limiting column is formed on the second limiting portion. Figure 2 and Figure 5 As shown, a limiting hole 13 is formed on the first limiting portion, and a limiting column is formed on the second limiting portion.

[0076] Furthermore, if Figure 2 and Figure 5 As shown, the limiting hole 13 passes through the chassis 10 in the left-right direction and extends in an arc shape around the first axis. A seventh connecting hole 4222 passing through the first side plate 422 in the left-right direction is formed on the first side plate 422 of the connecting portion 42 of the backrest 40, and the limiting post is penetrated through the seventh connecting hole 4222 and the limiting hole 13. The limiting post is slidably fitted in the limiting hole 13, that is, the limiting post can rotate around the first axis in the limiting hole 13, and the limiting hole 13 limits the rotation range of the limiting post, thereby limiting the rotation range of the backrest 40 around the first axis.

[0077] In this embodiment, a limiting column is provided on one of the first limiting portion and the second limiting portion and a limiting hole 13 is provided on the other. The limiting hole 13 extends in an arc shape around the first axis. The limiting column can be slidably fitted in the limiting hole 13. This can effectively simplify the structural structure of the first limiting portion and the second limiting portion, thereby effectively reducing the cost of the seat 100.

[0078] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0079] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0080] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or a communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0081] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0082] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A seat, characterized in that: include: Chassis; A base, the base is arranged on the upper side of the chassis, and the base is provided with a first pivoting portion; A connecting rod assembly, through which the base is connected to the chassis so as to be movable relative to the chassis; A backrest, the backrest is arranged at the rear side of the base, the lower end of the backrest is rotatably connected to the chassis around a first axis extending left and right, and the backrest is provided with a second pivoting portion; A linkage rod, one end of which is rotationally connected to the first pivoting portion and the other end of which is rotationally connected to the second pivoting portion.

2. The seat according to claim 1, characterized in that: Also includes: The bottom plate is arranged on the chassis and is movable relative to the chassis, and the connecting rod assembly is connected between the bottom plate and the base.

3. The seat according to claim 2, characterized in that: The backrest is provided with a third pivoting portion spaced apart from the second pivoting portion, and the rear end of the base plate is rotatably connected to the third pivoting portion. The seat further comprises: a first connecting rod, one end of which is rotatably connected to the front end of the bottom plate, and the other end of which is rotatably connected to the chassis.

4. The seat according to claim 3, characterized in that: The first axis, the second pivot portion and the third pivot portion are arranged at intervals in the front-to-rear direction, the first axis is located at the front side of the third pivot portion, and the second pivot portion is located at the rear side of the third pivot portion.

5. The seat according to claim 4, characterized in that: The backrest comprises: a backrest body and a connecting portion, wherein the backrest body extends up and down, and the connecting portion is connected to the lower end of the backrest body and extends forward. The front end of the connecting portion is rotatably connected to the chassis around the first axis, the third pivot portion is formed on the connecting portion and extends upward, and the second pivot portion is formed at the lower end of the backrest body and extends forward.

6. The seat according to claim 3, characterized in that: The connecting rod assembly includes a plurality of second connecting rods arranged at intervals, one end of the plurality of second connecting rods is rotatably connected to the base, and the other end of the plurality of second connecting rods is rotatably connected to the bottom plate.

7. The seat according to claim 6, characterized in that A plurality of the second connecting rods are symmetrically arranged on the left and right sides of the bottom plate.

8. The seat according to claim 7, characterized in that The first connecting rod has a first axial hole formed at the upper end thereof and passing through the first connecting rod in the left-right direction, the second connecting rod has a second axial hole formed at the lower end thereof and passing through the second connecting rod in the left-right direction, and the bottom plate has a third axial hole formed at the front end thereof and passing through the bottom plate in the left-right direction. The seat also includes: a pivot shaft, which is passed through the first shaft hole, the second shaft hole of the second connecting rod arranged on the left and right sides of the front end of the base plate, and the third shaft hole, so that the first connecting rod and the second connecting rod are rotatably connected to the base plate around the pivot shaft.

9. The seat according to any one of claims 1 to 8, characterized in that: The chassis is provided with a first limiting portion, and the backrest is provided with a second limiting portion, and the first limiting portion and the second limiting portion are limitedly matched to limit the rotation angle of the backrest relative to the chassis.

10. The seat according to claim 9, characterized in that One of the first limiting portion and the second limiting portion is formed as a limiting column and the other is formed as a limiting hole. The limiting hole extends in an arc shape around the first axis. The limiting column can be slidably fitted in the limiting hole.

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