Seat

Abstract

A seat, comprising a support (1) serving as a main body support of the seat, a backrest member (3) supporting the back of a human body, and a seat part (5) supporting the buttocks of the human body. The backrest member (3) is rotatably connected to the support (1), and the seat part (5) is also movably connected to the support (1) by means of rotary connection parts (4) and links (6). The seat part (5), the rotary connection parts (4), the links (6) and the support (1) constitute a four-link mechanism. The seat part (5) is driven to move by means of rotation of the backrest member (3) on the support (1), thereby achieving a seat-back linkage function, and the seat-back linage function enables the seat to have effects of preventing back rubbing and preventing loss of lumbar support. In order to avoid tipping, when the backrest member (3) tilts backwards, the seat part (5) moves forwards and upwards to maintain a balance point, such that the self-adaptive effect is always maintained in an optimal state.

Description

A seat TECHNICAL FIELD

[0001] The present application relates to the field of furniture, in particular to a seat. BACKGROUND

[0002] As a necessary life tool for home life and office environment, chairs have higher and higher comfort requirements for home life, and the comfort and operability of chairs have obviously improved on the premise of work efficiency in office environment. The design of the general chair on the traditional bottom plate structure limits the corresponding displacement of the seat when the user leans back on the back of the chair; that is, the movement between the back and the seat is independent. When the back leans back, the distance between the back and the seat will change, and in the case of unchanged seat position, the back and the user's back will relatively displace and rub, causing discomfort, and thus the so-called "rubbing back and running waist" problem occurs.

[0003] In view of the above problems, manufacturers have developed seat-back linkage chairs, which can realize ergonomic linkage of the seat and the back. Most of the seat-back linkage chairs on the market realize linkage between the back and the seat through the bottom plate structure below the seat.

[0004] The bottom plate structure is very common in the structure of office chairs at present. However, the cooperation and structure of the corresponding bottom plate are undoubtedly complex and tedious, which leads to the problem that the cost of processing and manufacturing the bottom plate is very high. The cost of a set of bottom plate mold and manufacturing the bottom plate is very high, which indirectly leads to a high price of the chair.

[0005] Therefore, it is necessary to design a seat with a simple structure and a lower price. TECHNICAL PROBLEM

[0006] In order to solve the above technical problems, the present application provides a seat, which comprises a support as a main support, a back support for supporting the back of the human body, and a seat part for supporting the hips of the human body. The support is the main support, and the bottom plate in the traditional seat is removed and replaced. The back support is rotatably connected to the support, and the seat part is movably connected to the support through a rotating connecting part and a connecting rod. The seat part, the rotating connecting part, the connecting rod, and the support constitute a four-bar linkage mechanism. The seat part is driven to move by the rotation of the back support on the support, realizing the seat-back linkage function. The seat-back linkage makes the seat have the effect of preventing rubbing back and running waist. The cost of the seat is greatly reduced after the bottom plate is cancelled, the production and assembly time is saved, and the production efficiency is improved. The present application increases the production benefit while ensuring comfort. In order to avoid tilting, the seat part moves upward and forward when the back support leans back, maintaining the balance point and keeping the adaptive effect in the best state. TECHNICAL SOLUTION

[0007] The technical scheme of the present application is implemented as follows:

[0008] A seat, comprising:

[0009] A support configured to support the main body of the seat, the lower end of the support being connected to a chair leg;

[0010] A back support configured to support the back of a human body, the back support being provided with a rotary connection portion, the rotary connection portion being rotatably connected to the support and the seat portion, respectively;

[0011] A seat portion configured to support the hips of a human body, the seat portion being provided with a link rod extending upward, the lower end of the link rod being rotatably connected to the seat portion, and the upper end of the link rod being rotatably connected to the support;

[0012] The seat has an initial state and a backward tilting state; in the initial state, the back support is vertical, and the back support and the seat portion are used for normal sitting of a human body; when switching from the initial state to the backward tilting state, the back support is rotated backward on the support to drive the seat portion to move, the rotary connection portion and the link rod cause the seat portion to move upward and forward; in the backward tilting state, the back support supports the back of a human body in a backward tilting manner.

[0013] The design starting point, concept and beneficial effects of the present application adopting the above technical scheme are as follows:

[0014] In the present scheme, the support serves as the main support, and the bottom plate in the traditional seat is removed and replaced; the back support is rotatably connected to the support, and the seat portion is movably connected to the support through the rotary connection portion and the link rod; the seat portion is driven to move by the rotation of the back support on the support, the seat-back linkage function is realized, the seat-back linkage makes the seat have the effect of preventing the back from being rubbed and the waist from being bent, the bottom plate is cancelled, the cost of the seat is greatly reduced, the production and assembly time is saved, and the production efficiency is improved; the present scheme increases the production benefit while ensuring the comfort.

[0015] However, since the present scheme is a bottomless suspended chair seat, the seat portion is in a state of being suspended on the support under the action of the rotary connection portion and the link rod, and there is no support of the bottom plate below, so it is necessary to keep the force concentration point of the human body on the seat within the support range of the chair leg, so as to avoid tilting:

[0016] Firstly, the center of gravity of the human body on the seat will move with the back driving the back support to tilt backward; secondly, when the back support tilts backward, the seat portion moves upward and forward, the balance point is maintained, and the self-adaptive effect is always maintained in the best state,

[0017] Specifically, the pressure of the buttocks on the seat can be fed back to the back support, generating a pushing force on the back support, and the pressure of the back on the back support can be fed back to the seat, generating an upward pushing force on the buttocks, thereby achieving the adaptive function; when the back support is tilted at an increased angle, the pressure of the back of the human body on the waist and back increases, and the distance of the seat moving forward and upward increases, the feedback of the pressure of the buttocks on the seat on the back support increases, thereby balancing the forces on the back support and the seat; the movement of the human body with the seat during the backward leaning and the adaptive balance of the forces on the back support and the seat keep the stress concentration point within the support range of the chair legs, avoiding tipping over. BRIEF DESCRIPTION OF DRAWINGS

[0018] Fig. 1 is a perspective view of the seat in the initial state according to the present application in embodiment 1;

[0019] Fig. 2 is a side view of the seat in the initial state according to the present application in embodiment 1;

[0020] Fig. 3 is a perspective view of the seat in the backward leaning state according to the present application in embodiment 1;

[0021] Fig. 4 is a side view of the seat in the backward leaning state according to the present application in embodiment 1;

[0022] Fig. 5 is a perspective view of the seat in the folded state according to the present application in embodiment 1;

[0023] Fig. 6 is a side view of the seat in the folded state according to the present application in embodiment 1;

[0024] Fig. 7 is a perspective view of the seat according to the present application in embodiment 2;

[0025] Fig. 8 is a side view of the seat according to the present application in embodiment 2;

[0026] Fig. 9 is a perspective view of the seat according to the present application in embodiment 2;

[0027] Fig. 10 is a perspective view of the adjusting and locking mechanism connected between the seat and the rotating connecting part according to the present application in embodiment 2;

[0028] Fig. 11 is a perspective view of the seat in the initial state according to the present application in embodiment 3;

[0029] Fig. 12 is a perspective view of the seat in the backward leaning state according to the present application in embodiment 3;

[0030] Fig. 13 is a perspective view of the seat in the initial state according to the present application in embodiment 3;

[0031] Fig. 14 is a schematic view of the switching of the seat furniture between the initial state and the reclined state in Example 3 of the present application;

[0032] Fig. 15 is a schematic view of the seat furniture in the initial state in Example 4 of the present application;

[0033] Fig. 16 is a schematic view of the seat furniture in the reclined state in Example 4 of the present application;

[0034] Fig. 17 is a schematic view of the switching of the seat furniture between the initial state and the reclined state in Example 4 of the present application;

[0035] Fig. 18 is a schematic view of the seat furniture in the initial state in Example 4 of the present application;

[0036] Fig. 19 is a schematic view of the seat furniture in the reclined state in Example 4 of the present application.

[0037] The reference signs are as follows: support 1; base 101; suspension part 102; support arm 103; chair leg 2; back support 3; rotating connection part 4; transmission rod 41; seat part 5; connecting rod 6; locking assembly 7; base plate 71; movable part 72; switch part 721; limiting part 722; spring 73; limiting column 74; adjustment locking mechanism 8; locked part 9; hook groove 10; recess 11; upper support 12; lower housing 13; rotating seat 14; accommodating groove 15; armrest part 16; mounting plate 17; connecting plate 18; handle 19; locking piece 20; rotating limiting groove 21; avoiding groove 22; limiting part 23.

[0038] DETAILED DESCRIPTION

[0039] In order to enable a more complete understanding of the above-mentioned objects, features and advantages of the present application, the present application will be described in further detail below with reference to the accompanying drawings and specific embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0040] In the following description, many specific details are set forth in order to provide a thorough understanding of the present application. However, the present application can be practiced in other ways different from those described herein, and therefore, the scope of protection of the present application is not limited by the specific embodiments disclosed below.

[0041] In the description of the present application, the terms "first", "second", "third" and the like are only used for the purpose of description and should not be understood as indicating or implying relative importance.

[0042] The specific embodiments of the present application are as follows:

[0043] Example 1: As shown in Figs. 1-4, the present application provides a seat furniture, comprising:

[0044] The support 1 is configured to support the main body of the seat, and the lower end of the support 1 is connected with the chair leg 2.

[0045] The back support 3 is configured to support the back of the human body, and the back support 3 is provided with a rotating connection part 4, which is respectively connected with the support 1 and the seat part 5.

[0046] The seat part 5 is configured to support the hips of the human body, and the seat part 5 is provided with an upwardly extending connecting rod 6, the lower end of the connecting rod 6 is connected with the seat part 5, and the upper end of the connecting rod 6 is connected with the support 1.

[0047] The seat has an initial state and a backward tilting state; in the initial state, the back support 3 is vertical, and the back support 3 and the seat part 5 support the human body normally; when switching from the initial state to the backward tilting state, the back support 3 drives the seat part 5 to move backward on the support 1, and the rotating connection part 4 and the connecting rod 6 make the seat part 5 move forward and upward; in the backward tilting state, the back support 3 supports the back of the human body backwardly.

[0048] In the scheme, the support 1 serves as the main body support, and the traditional bottom plate is removed and replaced. The back support 3 is connected with the support 1, and the seat part 5 is movably connected with the support 1 through the rotating connection part 4 and the connecting rod 6. The seat part 5, the rotating connection part 4, the connecting rod 6 and the support 1 form a four-bar linkage mechanism. The seat part 5 is driven to move by the rotation of the back support 3 on the support 1, realizing the seat-back linkage function. The seat-back linkage makes the seat have the effect of preventing the back from being rubbed and the waist from being moved. The removal of the bottom plate greatly reduces the cost of the seat, saves the production and assembly time, and improves the production efficiency. The scheme increases the production benefit while ensuring the comfort.

[0049] However, since the scheme is a bottomless suspended chair seat, the seat part 5 is in a state of being suspended on the support 1 under the action of the rotating connection part 4 and the connecting rod 6, and there is no support of the bottom plate below, so it is necessary to keep the force concentration point of the human body on the seat within the support range of the chair leg 2, so as to avoid tilting:

[0050] Firstly, the center of gravity of the human body on the seat moves with the back driving the back support 3 to tilt backward; secondly, when the back support 3 tilts backward, the seat part 5 moves forward and upward to maintain the balance point, and the self-adaptive effect is always maintained in the best state.

[0051] Specifically, the pressure of the buttocks on the seat 5 can be fed back to the back support 3, generating a pushing force on the back support 3, and the pressure of the back on the back support 3 can be fed back to the seat 5, generating an upward pushing force on the buttocks, thereby achieving the adaptive function; when the back support 3 is tilted at an increased angle, the pressure of the back of the human body on the waist and back increases, and at the same time, the seat 5 moves forward and upward by a larger distance, the pressure of the buttocks of the human body on the seat 5 increases the feedback to the back support 3, thereby balancing the forces on the back support 3 and the seat 5; the movement of the human body with the chair and the adaptive balance of the forces on the back support 3 and the seat 5 when leaning back make the force concentration point always remain within the support range of the chair leg 2, avoiding tipping over.

[0052] As shown in FIGS. 5 and 6, it also has a folded state, the back support 3 is flipped forward to be horizontal, and the seat 5 moves backward and upward to be close to the back support 3, to switch from the initial state to the folded state; when the chair is in the folded state, the back support 3 is close to the seat 5, and the back support 3 is vertically changed to be horizontal and parallel to the seat 5, making the shape more regular, reducing the space occupied in the height direction, reducing the outer contour size of the chair, reducing the packing volume, improving the space utilization rate when packing and moving, facilitating packaging and transportation, and reducing the cost of packaging and transportation, and at the same time, the back support 3 does not need to be disassembled during packaging and transportation. The structure for realizing folding or not is as follows:

[0053] As shown in FIG. 1, 6, the support 1 is provided with a locking assembly 7 and an adjusting locking mechanism 8, both of which are rotationally connected to the support 1, and the adjusting locking mechanism 8 is rotationally connected to the locking assembly 7; the adjusting locking mechanism 8 has an unlocked state and a locked state, in the unlocked state, the adjusting locking mechanism 8 can be adjusted in length, and in the locked state, the length of the adjusting locking mechanism 8 is locked; the back support 3 or the rotationally connected part 4 is provided with a locked piece 9, which is a bolt, or a rivet or a welded pin, etc.; in the initial state, the locking assembly 7 is locked with the locked piece 9, and the adjusting locking mechanism 8 is in the locked state; when switching from the initial state to the reclining state, the locking assembly 7 is locked with the locked piece 9, the locking assembly 7 rotates relative to the support 1 with the rotation of the back support 3, and the adjusting locking mechanism 8 is in the unlocked state and adjusts in length; in the reclining state, the locking assembly 7 is locked with the locked piece 9, and the adjusting locking mechanism 8 is in the locked state to maintain the reclining angle of the back support 3; in the folding state, the adjusting locking mechanism 8 is in the locked state, and the locked piece 9 is unlocked from the locking assembly 7; in this scheme, the locking assembly 7 is used to lock or unlock the locked piece 9, so that the back support 3 can rotate forward when the locked piece 9 is unlocked, and the seat can be switched to the folding state, and when the back support 3 rotates backward to switch to the reclining state, the locking assembly 7 rotates synchronously with the back support 3 and the rotationally connected part 4; it can also form a transmission relationship between the back support 3 and the adjusting locking mechanism 8 when the locking assembly 7 locks the locked piece 9; the adjusting locking mechanism 8 can be used to maintain the position of the locking assembly 7 in the folding state, and when switching from the folding state to the initial state, the locked piece 9 can be smoothly locked by the locking assembly 7 again, and the adjusting locking mechanism 8 does not affect the locking of the locked piece 9 at any position, because the rotation points of the locking assembly 7 and the rotationally connected part 4 coincide; it can also be used to lock the back support 3 at different reclining angles to make the seat in the reclining state; when the back support 3 rotates backward, the adjusting locking mechanism 8 in the unlocked state adjusts in length synchronously, and when the adjusting locking mechanism 8 is in the locked state again, the length of the adjusting locking mechanism 8 remains unchanged, and the back support 3 cannot rotate again to provide support.

[0054] Specifically, the locking assembly 7 comprises a base plate 71, a movable piece 72 and a spring 73, the base plate 71 is rotationally connected to the support 1, and the adjusting locking mechanism 8 is rotationally connected to the base plate 71; the movable piece 72 is rotationally connected to the base plate 71, and the spring 73 is connected to the base plate 71 and the movable piece 72 and acts on the movable piece 72; the movable piece 72 is provided with a hook groove 10, and the base plate 71 is provided with a recess 11; when the locked piece 9 enters the hook groove 10 and the recess 11, the locked piece 9 is locked by the locking assembly 7; when the locked piece 9 is separated from the hook groove 10 and the recess 11, the locked piece 9 is unlocked; the spring 73 is configured to keep the locking assembly 7 locked to the locked piece 9; in order to prevent the locking assembly 7 and the locked piece 9 from being separated in the initial state and the reclining state, the spring 73 needs to always keep the movable piece 72 in the state of locking the locked piece 9, so that the locked piece 9 can always be in the hook groove 10 and the recess 11 without being separated.

[0055] The movable piece 72 comprises a switch part 721 and a limiting part 722, the switch part 721 protrudes from the base plate 71, and the switch part 721 is configured to be actuated by a user to make the movable piece 72 and the base plate 71 open, so that the locked piece 9 can be separated; the switch part 721 protrudes from the base plate 71, which is convenient for the user to control, so as to switch to the folded state; the base plate 71 is provided with a limiting column 74, the limiting column 74 protrudes from the surface of the base plate 71, and the limiting column 74 is configured to abut against the limiting part 722 under the action of the spring 73; when the locked piece 9 is unlocked by actuating the switch part 721, the limiting part 722 abuts against the limiting column 74; the limiting part 722 prevents the movable piece 72 from rotating excessively when the locked piece 9 is unlocked; the adjusting locking mechanism 8 is a gas rod, and the locking and unlocking states of the gas rod are switched by controlling the switch of the gas rod; the gas rod can realize stepless adjustment, and each angle in the reclining state can be locked, so that the reclining state of the seat is more useful; when the reclining angle is small, it is suitable for switching the sitting posture to continue working when tired, or taking a break in time; when the reclining angle is large, it is suitable for lying and resting; in addition, when the switch of the gas rod is not opened, the connecting point between the gas rod, the base plate 71 and the support 1 forms a triangular stable structure, which supports the back support 3 better.

[0056] The rotating connecting part 4 is L-shaped, the rear end of the rotating connecting part 4 is fixedly connected with the back supporting part 3, the other end of the rotating connecting part 4 is rotatably connected with the rear end of the seat part 5, and the corner of the rotating connecting part 4 is rotatably connected with the support 1. The rotating connecting part 4 comprises a transmission rod 41, in the initial state, the transmission rod 41 is substantially vertical, the upper end of the transmission rod 41 is rotatably connected with the support 1, and the lower end of the transmission rod 41 is rotatably connected with the seat part 5; the upper end of the transmission rod is rotatably connected with the support, the lower end of the transmission rod is rotatably connected with the seat part; the rotating connecting point of the transmission rod 41 and the support 1 is 85-105mm away from the rotating connecting point of the connecting rod 6 and the support 1; the rotating connecting point of the transmission rod 41 and the seat part 5 is 85-105mm away from the rotating connecting point of the connecting rod 6 and the seat part 5. In the embodiment, the transmission rod 41 is arranged in parallel with the connecting rod 6, the distance between the rotating connecting points of the transmission rod 41 and the connecting rod 6 on the support 1 is 90mm, and the distance between the rotating connecting points of the transmission rod 41 and the connecting rod 6 on the support 1 is also 90mm. Compared with the prior art, the transmission rod 41 and the connecting rod 6 are closer as two swing rods in the four-bar linkage mechanism, the structure is more compact, the sense of strangeness of the transmission rod 41 and the connecting rod 6 is weakened, and the integrity of the seat is better; in order to make the visual effect of the seat part 5 being suspended more obvious, the transmission rod 41 and the connecting rod 6 are both rotatably connected with the rear end of the seat part 5, the front end of the seat part 5 is more obviously suspended, and the visual effect is stronger.

[0057] The seat part 5 has a seat surface for fitting the human buttocks, the rotating connecting point of the rotating connecting part 4 and the seat part 5 is 10-25cm higher than the lowest point of the seat surface, and in the embodiment, the height is 12cm; after the buttocks are located on the seat surface, the rotating connecting position is close to the position of the human hip joint, so that the user is more comfortable when switching between the sitting position and the lying position, and has no feeling of rubbing back and running waist.

[0058] A gas rod is arranged between the lower end of the support 1 and the chair leg 2, and the gas rod can adjust the height of the seat part 5.

[0059] Further, the support 1 comprises a base 101 and two left and right spaced suspension parts 102, the base 101 and the suspension parts 102 are vertically spaced, the base 101 is connected with the air rod; the base 101 is provided with at least two upward extending supporting arms 103, and the base 101 and each suspension part 102 are connected through the supporting arm 103; the rotating connecting part 4 and the connecting rod 6 are both rotatably connected on the suspension part 102; the suspension part 102 is configured to allow the seat part 5 to be suspended between the suspension part 102 and the base 101; the base 101 and the seat part 5 are vertically spaced; the base 101 is not a bottom plate, but only serves as a lower end of the support 1 to be connected with the chair leg 2, and is spaced from the seat part 5, so that the base 101 is in a suspended state; the supporting arm 103 extending from the base 101 also extends to the left and right sides respectively and is connected with the left and right two suspension parts 102, and the suspension of the seat part 5 provides a basis for the overall structure of the support 1; moreover, from bottom to top, the supporting arm 103 extends backward from the base 101 and bends forward, and when viewed in the left and right directions, the feature of the suspended seat part 5 is more obvious, the visual perception of the suspended seat part 5 is stronger, and the seat part 5 is more eye-catching.

[0060] Embodiment 2: The difference between this embodiment and embodiment 1 is only that the folding state and the locking assembly 7 and the locked part 9 are cancelled, and the rotating connection point between the rotating connecting part and the seat part in this embodiment is not higher than the seat surface; in particular:

[0061] The adjusting and locking mechanism 8 is used to unlock or lock the movement between the rotating connecting part 4, the seat part 5, the connecting rod 6 and the support 1, when unlocked, the four-bar linkage mechanism composed of the rotating connecting part 4, the seat part 5, the connecting rod 6 and the support 1 can move to adjust the reclining angle of the back support 3, when the adjusting and locking mechanism 8 is locked, the four-bar linkage mechanism is locked, and the back support 3 cannot move, and the back support 3 has the ability to support the back of the human body.

[0062] Therefore, in order to achieve the above purpose, the adjusting and locking mechanism 8 needs to be arranged between two distance variable parts, that is, one end of the adjusting and locking mechanism 8 is rotatably arranged on the seat part 5 or the support 1, and the other end of the adjusting and locking mechanism 8 is rotatably arranged on the rotating connecting part 4 or the connecting rod 6, and the adjusting and locking mechanism 8 is configured to unlock or lock the movement between the rotating connecting part 4, the seat part 5, the connecting rod 6 and the support 1.

[0063] The length of the adjusting and locking mechanism 8 can be adjusted, and when the four-bar linkage mechanism formed by the rotating connecting part 4, the seat part 5, the connecting rod 6 and the support 1 moves, the distance between the seat part 5 and the rotating connecting part 4 and the support 1 changes, and the distance between the support 1 and the rotating connecting part 4 also changes. Therefore, the adjusting and locking mechanism 8 is rotatably connected to the two parts whose distance changes, respectively, so as to adjust the length with the movement of the four-bar linkage mechanism. When the adjusting and locking mechanism 8 is locked, the movement of the four-bar linkage mechanism is locked, thereby providing the supporting force.

[0064] In the embodiment, as shown in FIGS. 7-10, the seat part 5 comprises an upper support body 12 and a lower housing 13, the lower housing 13 is installed below the upper support body 12, the upper support body 12 downwardly protrudes a rotating seat 14, the rotating seat 14 protrudes downwardly from the seat part 5 through the lower housing 13, the adjusting and locking mechanism 8 is located between the upper support body 12 and the lower housing 13, and one end of the adjusting and locking mechanism 8 is rotatably arranged on the rotating seat 14; the rotating connecting part 4 is rotatably connected to the rear end of the seat part 5 through a rotating shaft (not shown), the upper support body 12 is upwardly provided with a receiving groove 15, the rotating shaft is inserted into the seat part 5 and enters the receiving groove 15, and the other end of the adjusting and locking mechanism 8 is rotatably connected to the rotating shaft in the receiving groove 15.

[0065] Embodiment 3: The difference between the embodiment and the embodiment 2 is only that the adjusting and locking mechanism 8 is arranged at different positions, and the rotating connecting point of the rotating connecting part 4 and the seat part 5 is higher than the seat surface in the embodiment. Specifically:

[0066] As shown in FIGS. 11-14, the upper end of the support 1 is provided with a handrail 16, the handrail 16 is configured to support the human hand; the adjusting and locking mechanism 8 is a gas rod, the adjusting and locking mechanism 8 is arranged between the handrail 16 and the rotating connecting part 4, one end of the adjusting and locking mechanism 8 is rotatably connected to the handrail 16, and the other end is rotatably connected to the rotating connecting part 4; the rotating connecting point of the rotating connecting part 4 and the seat part 5 is 15 cm higher than the lowest point of the seat surface.

[0067] Embodiment 4: The difference between the embodiment and the embodiment 3 is only that the adjusting and locking mechanism 8 is different, and the adjusting and locking mechanism 8 in the embodiment is a knob; specifically:

[0068] As shown in FIGS. 15-19, the upper end of the support 1 is provided with a handrail 16, the handrail 16 and the support 1 are connected through a mounting plate 17, the mounting plate 17 downwardly extends a connecting plate 18, the connecting rod 6 and the rotating connecting part 4 are rotatably connected to the connecting plate 18.

[0069] The knob is arranged on the connecting plate 18 and is connected with the connecting plate 18 through a threaded connection; one end of the knob is a handle 19, the handle 19 protrudes outward from the support 1, the other end is connected with a locking piece 20, and the locking piece 20 is located beside the rotating connecting part 4; rotating the handle 19 drives the locking piece 20 to be close to or away from the rotating connecting part 4, when the locking piece 20 abuts against the rotating connecting part 19, the adjusting locking mechanism 8 adjusts the reclining adjustment of the chair back.

[0070] Further, the rotating connecting part 4 is provided with a rotating limiting groove 21 and an avoiding groove 22, the rotating limiting groove 21 and the avoiding groove 22 are concentric and arranged at intervals, the connecting plate 18 is provided with a limiting piece 23, the limiting piece 23 is located beside the knob, the avoiding groove 22 is configured to avoid the knob, one end of the knob protrudes from the rotating connecting part 4 through the avoiding groove 22, and the locking piece 20 is arranged at the end; the limiting piece 23 is arranged in the rotating limiting groove 21, moves in the rotating limiting groove 21 with the rotation of the rotating connecting part 4, and the limiting piece 23 and the rotating limiting groove 21 limit the movement, preventing the chair back from excessive movement; the avoiding groove 22 can also avoid the knob during the reclining of the chair back.

[0071] The rotating connecting point of the rotating connecting part 4 and the seat part 5 is higher than the lowest point of the seat surface 13.5 cm.

Claims

1. A seat furniture, characterized in that, The chair comprises: a support configured to support a main body of the chair, a lower end of the support being connected to a chair leg; a back support configured to support a back of a human body, the back support being provided with a rotating connection part, the rotating connection part being rotatably connected to the support and the seat part respectively; a seat part configured to support a hip of the human body, the seat part being provided with a link rod extending upward, a lower end of the link rod being rotatably connected to the seat part, and an upper end of the link rod being rotatably connected to the support; the chair having an initial state and a backward tilting state; in the initial state, the back support is vertical, and the back support and the seat part are used for normal sitting of the human body; when the initial state is switched to the backward tilting state, the back support is rotated backward on the support to drive the seat part to move, the rotating connection part and the link rod enable the seat part to move forward and upward; in the backward tilting state, the back support supports the back of the human body in a backward tilting manner.

2. The sitter of claim 1, wherein: The chair further comprises an adjusting and locking mechanism, one end of the adjusting and locking mechanism being rotatably arranged on the seat part or the support, the other end of the adjusting and locking mechanism being rotatably arranged on the rotating connection part or the link rod, and the adjusting and locking mechanism being configured to unlock or lock the movement between the rotating connection part, the seat part, the link rod and the support.

3. The sitter of claim 1, wherein: The chair further has a folding state, the back support being flipped forward to be horizontal, and the seat part being moved backward and upward to be close to the back support, so as to switch from the initial state to the folding state.

4. The sitter of claim 3, wherein: The support is provided with a locking assembly and the adjusting and locking mechanism, the locking assembly and the adjusting and locking mechanism being rotatably connected to the support, and the adjusting and locking mechanism being rotatably connected to the locking assembly; the adjusting and locking mechanism has an unlocked state and a locked state, in the unlocked state, the adjusting and locking mechanism can be adjusted in length, and in the locked state, the length of the adjusting and locking mechanism is locked; the back support or the rotating connection part is provided with a locked part, in the initial state, the locking assembly is locked with the locked part, and the adjusting and locking mechanism is in the locked state; when the initial state is switched to the backward tilting state, the locking assembly is locked with the locked part, the locking assembly and the adjusting and locking mechanism are rotated relative to the support with the rotation of the back support, the adjusting and locking mechanism is in the unlocked state, and the length of the adjusting and locking mechanism is adjusted; in the backward tilting state, the locking assembly is locked with the locked part, and the adjusting and locking mechanism is in the locked state to keep the backward tilting angle of the back support; in the folding state, the adjusting and locking mechanism is in the locked state, and the locked part is separated from the locking assembly.

5. The sitter of claim 4, wherein: The locking assembly comprises a base plate, a movable part and a spring, the base plate being rotatably connected to the support, and the adjusting and locking mechanism being rotatably connected to the base plate; the movable part is rotatably connected to the base plate, and the spring is connected to the base plate and the movable part and acts on the movable part; a hook groove is formed in the movable part, and a recess is formed in the base plate, the locked part being locked by the locking assembly when the locked part enters the hook groove and the recess, and the locked part being unlocked when the locked part is separated from the hook groove and the recess; the spring is configured to keep the locking assembly to lock the locked part.

6. The sitter of claim 5, wherein: The movable part comprises a switch part, the switch part protruding from the base plate, and the switch part being configured to be actuated by a user to enable the movable part and the base plate to be opened, and the locked part to be unlocked.

7. The article of furniture of claim 6, wherein: The movable part further comprises a limiting part, and a limiting column is arranged on the base plate; the limiting part is configured to abut against the limiting column under the action of the spring, and the limiting part abuts against the limiting column when the switch part is actuated to unlock the locked part.

8. The sitter of claim 4, wherein: The adjusting and locking mechanism is a gas rod.

9. The sitter of claim 1, wherein: The rotating connecting part is L-shaped, the rear end of the rotating connecting part is fixedly connected with the back supporting part, the other end of the rotating connecting part is rotatably connected with the rear end of the seat part, and the corner of the rotating connecting part is rotatably connected with the support.

10. The sitter of claim 1, wherein: An air cylinder is arranged between the lower end of the support and the chair leg.

11. The sitter of claim 1, wherein: The seat part has a seat surface for fitting the human buttocks, and the rotating connecting point of the rotating connecting part and the seat part is 10-25 cm higher than the lowest point of the seat surface.

12. The sitter of claim 1, wherein: The rotating connecting part comprises a transmission rod, the upper end of the transmission rod is rotatably connected with the support, and the lower end of the transmission rod is rotatably connected with the seat part; the rotating connecting point of the transmission rod and the support is 85-105 mm away from the rotating connecting point of the connecting rod and the support; and the rotating connecting point of the transmission rod and the seat part is 85-105 mm away from the rotating connecting point of the connecting rod and the seat part.

13. The sitter of claim 12, wherein: The transmission rod and the connecting rod are arranged in parallel.

14. The sitter of claim 12, wherein: The transmission rod and the connecting rod are both rotatably connected with the rear end of the seat part.

15. The sitter of claim 1, wherein: The support comprises a base and two left and right spaced suspension parts, the base and the suspension parts are arranged in vertical space, at least two upward extending supporting arms are arranged on the base, and the base and each suspension part are connected through the supporting arms; the rotating connecting part and the connecting rod are both rotatably connected with the suspension parts; the suspension parts are configured to hang the seat part between the suspension parts and the base; and the base and the seat part have vertical space.

16. The sitter of claim 1, wherein: From bottom to top, the supporting arms extend rearward from the base and bend forward.

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