WO2020232839A1

WO2020232839A1 - Seat

Info

Publication number: WO2020232839A1
Application number: PCT/CN2019/099880
Authority: WO
Inventors: 王大秋; 周骏
Original assignee: 浙江胜途家具科技有限公司
Priority date: 2019-03-28
Filing date: 2019-08-09
Publication date: 2020-11-26
Also published as: CN210276509U; CN110123054A

Abstract

A seat, comprising a seat frame (100) having a first seat frame side (110) and a second seat frame side (120) that are symmetrically arranged; a back frame (200), the lower part of which is connected to the seat frame (100), having a first back frame side (210) and a second back frame side (220) that are symmetrically arranged; a connecting base (300) connected to the lower part of the seat frame (100) and the lower part of the back frame (200), the connecting base (300), the lower part of the seat frame (100), and the lower part of the back frame (200) being connected together to form a kinematic chain mechanism (400); and a first flexible member (500), two ends of which are connected to the seat frame (100) and the back frame (200) respectively, being able to elastically deform and reset and rebound under the effect of an external force. Under the effect of the kinematic chain mechanism (400), when the back frame (200) is subjected to a backward acting force, the seat frame (100) moves backward and lifted, the first flexible member (500) deforms and an opening at a bend is expanded; when the backward acting force applied to the back frame (200) is gradually reduced, the seat frame (100) gradually moves forward and is lowered, and the first flexible member (500) gradually resets and rebounds until it returns to an initial state. The operation is simple and the structure is simple.

Description

A seat

Technical field

The invention belongs to the technical field of furniture equipment, and particularly relates to a seat with a reclining adaptive gravity adjustment function.

Background technique

As an indispensable product in office furniture, office chairs are favored by consumers because of their good practicability. At present, there are many functions of seat backs on the market, such as forward and backward reclining functions, but these functions need to rely on the chassis. The complex structure and adjustment difficulty of the chassis will not only increase the difficulty of operation for users, but also increase the cost.

The prior art CN102905579B discloses a “reaction mechanism for the backrest of a chair and a chair equipped with the mechanism”. The mechanical rearward tilt linkage mechanism composed of the seat, the backrest and the spring enables the backrest to link up when the seat is tilted backward. The main point of the design is to change the spring that was originally set on the back of the backrest to the bottom of the seat. The appearance is simple. However, this mechanical backward tilt linkage mechanism is very complicated, and the seat and backrest are separated. When tilting, only linking the underside of the backrest with the underside of the seat has poor stability. In order to increase stability, it will inevitably complicate the linkage mechanism with springs. At the same time, the separation of the seat and the backrest will inevitably reduce the backward tilt of the backrest. Smoothness and stability when resetting, strong feeling of rubbing back, poor comfort.

In order to overcome the above-mentioned deficiencies in the prior art, the present invention provides an ergonomic seat with a reclining adaptive gravity adjustment function that has simple operation, simple structure, high stability, good safety, and good comfort.

Summary of the invention

In order to solve the above technical problems, the purpose of the present invention is to provide an ergonomic seat with a reclining adaptive gravity adjustment function with simple operation, simple structure, high stability, good safety and good comfort.

In order to achieve the above objectives, the present invention adopts the following technical solutions:

A seat including:

The seat frame has a first seat frame side and a second seat frame side symmetrically arranged, and both the first seat frame side and the second seat frame side are U-shaped with openings facing backward;

A back frame, the lower part of which is connected to the seat frame, and has a first back frame side and a second back frame side that are symmetrically arranged;

The connecting seat is connected to the lower part of the seat frame and the lower part of the back frame at the same time. The seat frame, the back frame, and the connecting seat are connected to form a kinematic chain mechanism useful to realize the back frame and reset;

The first flexible part, the two ends of which are respectively connected with the seat frame and the back frame, can be elastically deformed and can be reset and rebound under the action of external force;

Under the action of the kinematic chain mechanism, when the back frame receives a backward force, the seat frame moves backward and the height is raised, and the first flexible member deforms; when the force disappears or gradually decreases, the back The frame is tilted forward, the seat frame is gradually forward and the height is reduced, and the first flexible member gradually resets and rebounds until it returns to the initial state.

The present invention realizes the reclining and resetting of the back frame by combining with a simple kinematic chain mechanism, wherein the first flexible member also helps to realize the reclining and resetting of the back frame. The present invention can automatically adjust according to the size of the user's own weight The user’s reclining force can realize the function of reclining adaptive gravity adjustment and ergonomics. Among them, the first seat frame side and the second seat frame side are set in a U-shape to provide a structural foundation for the kinematic chain mechanism and provide deformation space ; Under the action of the kinematic chain mechanism, when the back frame receives a backward force, the seat frame is raised backward and height, and the first flexible member is squeezed and deformed; when the back frame is gradually reduced by the backward force , The seat frame is gradually forward and the height is reduced, the first flexible member gradually resets and rebounds until it returns to the initial state, without the help of external power source, the structure is simple, and the operation is simple; at the same time, the seat frame and the back frame adopt the first A flexible piece is connected to make the seat frame and back frame more integrated. On the one hand, it helps to realize the back frame and resetting, and on the other hand, it increases the stability and comfort when tilting back and reduces the feeling of back rubbing. In other words, the first flexible part will also be squeezed by force when the back frame is leaning back, so that it has a certain buffering effect during the back frame leaning back, and has good comfort, stability, stability and safety. When you start to lean forward, the force on the back frame is gradually reduced. Because the first flexible part has resilience, the back frame can be better reset. At the same time, the first flexible part also has the function of supporting the user's waist and back. Better firmness; in addition, the seat frame of the present invention is highly integrated and has an integrated streamlined shape, which does not break into two parts on the upper surface of the seat frame in order to realize the adaptive function of backwards like in the prior art. , And then use a complex hinge mechanism for hinge connection. Not only is the structure complicated and the mold opening cost is high, but also, when the seat frame is raised upward, sharp bulges will be formed between the front and rear parts. After sitting up, the comfort is very poor; the present invention does not have such a problem.

Preferably, the kinematic chain mechanism includes a virtual four-bar linkage mechanism formed by a first turning point, a second turning point, a third turning point and a virtual tough fourth turning point that are connected end to end.

A virtual four-bar linkage mechanism is formed by the four rotation points formed between the seat frame, the back frame and the connecting seat, which realizes the functions of the back frame backward, the seat frame backward and upward, and the back frame reset, the seat frame forwards, Lowering function; at the same time, three of the four turning points are the actual turning points. The overall seat is mostly rigid or slightly tough, which greatly reduces the material requirements without considering its deformation factors, and at the same time it is firm Good, and better support for users.

Preferably, the side of the first seat frame includes an upper support rod, a lower support rod, and a second flexible member that can be elastically deformed and reset and rebound under the action of an external force. The upper and lower ends of the second flexible member are respectively connected to The front end of the upper support rod and the front end of the lower support rod are connected.

The upper support rod, the lower support rod, and the second flexible member are connected to form a U-shaped structure, which provides a structural foundation for the kinematic chain mechanism and provides deformation space; the elastically deformable second flexible member is used to form a virtual in the kinematic chain mechanism The turning point of the U-shaped first seat frame facilitates the deformation of the side of the U-shaped first seat frame, thereby realizing the functions of the back frame backward, the seat frame upward, the back frame reset, and the seat frame fall forward. At the same time, the back frame can be restored Provide resilience to facilitate the reset of the back frame.

Preferably, the rear part of the upper support rod and the lower part of the first back frame are hinged to form a first rotation point, and the lower part of the first back frame and the rear part of the connecting seat are hinged to form a second rotation point. The hinged connection between the upper part and the front part of the connecting seat forms a third pivot point, and the second flexible part forms a virtual tough fourth pivot point.

The first turning point, the second turning point, and the third turning point are the actual turning points formed by the hinged connection. The angle and amplitude that facilitate the rotation of the seat frame can be larger, and the effect of the back frame and the seat frame is more For obvious and better comfort; the elastically deformable second flexible member forms a virtual tough fourth turning point, which is used to realize the back frame and also provide resilience for the back frame to recover; when the human body is leaning back , Generate the force of point F acting on the back frame, while the seat frame is also under the downward pressure of point E, the back frame rotates with the second rotation point as the axis and tilts backward, and the second rotation point rotates backward while driving The first turning point rotates backward, because the first turning point connects the lower part of the first back frame and the rear part of the upper support rod, and combines the U-shaped shape on the side of the first seat frame and the second flexible part to be elastically deformable When the first turning point pulls the rear of the upper support rod to rotate backwards, the height of the first turning point becomes higher, the angle between the upper support rod and the lower support rod becomes larger, the upper support rod is raised, and the seat frame is realized Backward and lift up, (at the same time, when the first rotation point rotates backward, the first flexible member is also squeezed and deformed by the first rotation point and the side of the first back frame, resulting in a certain buffering effect), when When the human body starts to lean forward, the force on the back frame is gradually reduced. The back frame realizes forward reset under the action of the linkage of the kinematic chain mechanism and the elastic resetting of the first and second flexible parts, and the seat frame moves forward at the same time , Height reduction. Of course, the angle change between the upper support rod and the lower support rod should be appropriate. If the angle is too large, the elastic performance of the second flexible member will be damaged and the service life will be affected. It can be seen that the present invention does not need to use a complicated mechanical adjustment method, and only needs to use the user's own weight to realize the automatic adjustment function of the user's reclining force and the reset process, which is ergonomic.

Preferably, the first flexible member is provided with a forward bending opening, and the bending is located in the gap between the rear end of the seat frame and the front surface of the back frame; when the back frame receives a backward force, the first bending A flexible piece deforms, which makes the opening at the bend larger. When the back frame receives a gradually reduced force, the first flexible piece gradually resets and rebounds, and the shape of the opening at the bend gradually decreases until it returns to the original status.

When the first turning point rotates backward, the bending will be squeezed and deformed by the first turning point and the side of the first back frame to increase the buffering effect. At the same time, the setting of the bending also makes the back frame and the seat frame The reset rebound effect is better.

Preferably, the upper surface portion of the seat frame, the first flexible member, and the front surface portion of the back frame form a continuous curved surface structure, and an integrated cloth layer is connected to the continuous curved surface structure.

The seat frame and the back frame are connected through the first flexible member and the three form a coherent curved surface structure, and an integrated cloth layer can be arranged on the top frame, which has good integrity, good comfort, simple and beautiful appearance.

Preferably, both ends of the first flexible member are respectively connected with the upper surface of the seat frame and the front surface of the back frame.

Preferably, the connection point a between the first flexible part and the seat frame is located at the middle and rear part of the upper surface of the seat frame, and the connection point b between the first flexible part and the back frame is located at the middle and lower part of the front surface of the back frame.

As the user sits on the seat surface, the contact area between the middle and rear part of the upper surface of the seat frame and the middle and lower part of the front surface of the back frame and the user is relatively small, which can avoid affecting the rebound reset and cushioning effect of the first flexible member .

Preferably, the lower support rod is provided with a limiting protrusion at the rear, and the front of the connecting seat is provided with a limiting groove for accommodating the limiting protrusion, and the limiting protrusion is accommodated in the limiting groove and both The hinged connection forms the third rotation point, and there is a limit gap in the limit groove for rotating the limit protrusion.

At the third rotation point, there is a limit gap when the back of the lower support rod is rotated, which can effectively avoid the too small rotation amplitude, excessive rotation and deformation of the lower support rod and the entire seat frame, and adjust the upper support rod and the lower layer The angle between the support rods is deformed, so that the angle of the back frame can be adjusted according to the needs, and the safety, stability, and comfort are better, and it is more ergonomic.

Preferably, the bottom of the first back frame side is sequentially bent forward to form a first bending part, and upward to form a second bending part, and the first back frame side is a hook-shaped structure with an upward opening as a whole; The upper part of the two bending parts forms a first turning point, and the lower part forms a second turning point.

The side of the first back frame is a hook-like structure with an opening upward as a whole to realize the functions of lifting the seat frame when the back frame is tilted back and lowering the seat frame when the back frame is reset. Specifically, when the human body is tilted back, the back frame is The second turning point is the axis rotation and tilting backward. The second turning point turns backward while driving the first turning point to turn backward. The hook structure on the side of the first back frame can make the height of the first turning point higher. , The angle between the upper support rod and the lower support rod becomes larger, the upper support rod is raised, and the seat frame is raised.

Preferably, the first flexible member is L-shaped or V-shaped as a whole, and includes a flexible portion a, a flexible portion b, and a bend formed between the flexible portion a and the flexible portion b; A tough flexible material, the first flexible part adopts a toughened flexible material, and the angle of the opening at the bend can be increased from 40-48° in the initial state to 60°-80°.

The L-shaped or V-shaped shape is to reflect the bending structure of the first flexible part, so that the back frame, the seat frame deformation and the resetting process of the two are more stable; the first flexible part is made of toughened flexible material, because the first flexible part A flexible part has a high frequency of bending changes, so the use of toughened flexible materials can prevent the first flexible part from being unrecoverable after frequent deformation, so that it has a better elastic reset effect and prolongs its service life; the bending angle can be Increased from 40-48° in the initial state to 60°-80°, effectively ensuring the comfort and stability of the back frame, the seat frame up and the reset.

Preferably, the upper support rod, the lower support rod and the second flexible part are integrally formed, wherein the upper support rod and the lower support rod are rigid, and the second flexible part is softer than the upper support rod and the lower support rod.

The three-in-one molding increases the integrity and firmness of the side of the first seat frame and the entire seat frame. The second flexible part is softer than the upper support rod and the lower support rod, so that the second flexible part can be elastically deformed. A virtual fourth rotation point is formed to form a kinematic chain mechanism. The upper support rod and the lower support rod themselves do not deform or basically do not deform. Three of the four rotation points are actual rotation points, which greatly reduces the material requirements and does not need to be excessive. Consider its deformation factors, and at the same time, it has better support for users and better stability.

Preferably, the second flexible member is curved; the second flexible member is made of a toughened flexible material, and the angle of the curved second flexible member can be increased from 35° to 42° in the initial state to 45°～60°.

The second flexible part is curved, which facilitates bending and elastic deformation; due to the high frequency of the second flexible part's bending changes, the use of toughened flexible materials can prevent the second flexible part from being irrecoverable after frequent deformation, so that The elastic reset effect is better and the service life is prolonged; the angle of the second flexible part can be increased from 35°～42° in the initial state to 45°～60°, effectively ensuring that the back frame is tilted back, the seat frame is raised and Comfort and stability of reset.

Preferably, a seat frame support is connected between the first seat frame side and the second seat frame side, and a back frame support is connected between the first back frame side and the second back frame side.

The seat frame support and the back frame support are respectively used to increase the firmness of the entire seat frame and the entire back frame, and are not prone to deformation, and at the same time, it is convenient to connect the cloth layer, so that the cloth layer is not prone to deformation such as collapse.

Preferably, the connecting seat is a chassis, and a supporting air rod and a supporting base are fixedly connected to the lower part of the chassis in sequence.

Compared with the prior art, the beneficial effects of the present invention are:

The invention provides an ergonomic seat with a reclining adaptive gravity adjustment function that is simple in operation, simple in structure, high in stability, good in safety and comfortable. The invention realizes the backward and resetting of the back frame by combining the set simple kinematic chain mechanism and the assistance of the first flexible member, and can automatically adjust the user's backward force according to the user's own weight, and realize the backward adaptive gravity adjustment Function and ergonomics, among them, the first seat frame side and the second seat frame side are set in a U-shape, which provides a structural foundation for the kinematic chain mechanism and provides deformation space;

Under the action of the kinematic chain mechanism, when the back frame is subjected to a backward force, the seat frame is raised backward and height, and the first flexible member deforms and presents a tendency to bend and expand; when the back frame is subjected to backward action When the force gradually decreases, the seat frame gradually moves forward and the height decreases, and the first flexible member gradually resets and rebounds until it returns to the initial state. The operation is simple and the structure is simple; at the same time, the seat frame and the back frame are connected by the first flexible member, The seat frame and the back frame are more integrated. On the one hand, it helps to realize the back frame and resetting, and on the other hand, it increases the stability and comfort when tilting back, and reduces the feeling of back rubbing.

Specifically, the first flexible member will also be deformed when the back frame is leaning back, so that it has a certain buffering effect during the back frame, which is comfortable, stable, stable, and safe. When the human body starts When leaning forward, the force on the back frame is gradually reduced. Because the first flexible member has resilience, the back frame can be better reset. At the same time, the first flexible member also has the function of supporting the user's waist and back, which is comfortable and firm. Better sex.

Description of the drawings

Figure 1 is a schematic diagram of the structure of the seat, back frame, and connecting seat in embodiment 1 after being matched;

Fig. 2 is a schematic diagram of an enlarged structure of part A in Fig. 1;

Figure 3 is a schematic diagram of the structure of the back frame;

Fig. 4 is a schematic diagram of an enlarged structure of part B in Fig. 3;

Fig. 5 is a schematic diagram of the structure of part C in Fig. 3;

Figure 6 is a schematic diagram of the structure of the first flexible member;

Figure 7 is a schematic diagram of the structure of the seat frame;

Figure 8 is another structural schematic diagram of the seat frame;

Fig. 9 is a schematic diagram of an enlarged structure of part D in Fig. 8;

Figure 10 is a schematic diagram of the structure of the connecting seat;

Figure 11 is a structural diagram of the seat as a whole and the kinematic chain mechanism;

Figure 12 is a schematic diagram of the structure of the seat as a whole and only acting on the seat frame;

Figure 13 is a schematic diagram of the structure of the seat as a whole while acting on the back frame and the seat frame at the same time;

Fig. 14 is a schematic diagram of an enlarged structure of part E in Fig. 13;

FIG. 15 is a schematic view of the structure of FIG. 13 in a moving state.

Detailed ways

The specific embodiments of the present invention will be described in detail below in conjunction with the drawings.

This embodiment relates to the reference orientation of each component, such as up, down, front, back, etc., which are described from the perspective of the user sitting behind the seat; among them, the following first seat frame side 110 and second seat The frame side 120 is arranged symmetrically, and the first back frame side 210 and the second back frame side 220 are arranged symmetrically. Therefore, the following descriptions such as the first rotation point 410, The second rotation point 420, the third rotation point 430, and the virtual tough fourth rotation point 440 are also set symmetrically.

Examples:

A seat, as shown in Figures 1-15, includes:

The seat frame 100 has a first seat frame side 110 and a second seat frame side 120 that are symmetrically arranged. Both the first seat frame side 110 and the second seat frame side 120 are U-shaped with an opening facing back; the first seat A seat frame support 150 is connected between the frame side 110 and the second seat frame side 120;

The back frame 200, whose lower part is connected to the seat frame 100, has a first back frame side 210 and a second back frame side 220 that are symmetrically arranged; a back frame support is connected between the first back frame side 210 and the second back frame side 220 250;

The connecting seat 300 is simultaneously connected to the lower part of the seat frame 100 and the lower part of the back frame 200. The seat frame 100, the back frame 200, and the connecting seat 300 are connected to form a kinematic chain mechanism 400 useful for realizing the back frame 200 reclining and resetting; The connecting seat 300 is a chassis, and a support rod 700 and a support base 800 are sequentially fixedly connected to the lower part of the chassis;

The first flexible member 500, which can be elastically deformed and resettable under external force, is made of toughened flexible material, and its two ends are respectively connected with the upper surface 130 of the seat frame and the front surface 230 of the back frame to form a coherent curved surface Structure, and an integrated cloth layer is connected to the continuous curved structure; the first flexible member 500 is L-shaped as a whole, specifically, as shown in FIG. 6, includes a flexible portion a530, a flexible portion b540, and a A forward bend 510 is opened between the flexible portion a530 and the flexible portion b540. The bend 510 is located in the gap between the rear end of the seat frame 100 and the front surface 230 of the back frame. When the back frame 200 receives a backward force When the first flexible member 500 is deformed, the opening at the bend 510 becomes larger. When the back frame 200 is gradually reduced by the backward force, the first flexible member 500 gradually resets and rebounds, and the shape of the opening at the bend gradually becomes Decrease until it returns to the initial state, the angle of the bending 510 can be increased from 40-48° in the initial state to 60°-80°.

Furthermore, the connection a140 of the first flexible member 500 and the seat frame 100 is located in the middle and rear of the upper surface 130 of the seat frame, and the connection b240 of the first flexible member 500 and the back frame 200 is located on the front surface 230 of the back frame. In the middle and lower part, specifically, the two ends of the first flexible member 500 are provided with connecting holes G520. After the screws pass through the connecting holes G520 at both ends, the two ends of the first flexible member 500 are respectively fastened at the connection a140 and the connection b240. Inside the built-in nut 900 on the

Under the action of the kinematic chain mechanism 400, when the back frame 200 receives a backward force, the seat frame 100 is rearwardly and highly elevated, the first flexible member 500 is deformed, and the opening at the bend tends to expand; When the frame 200 is gradually reduced by the backward force, the seat frame 100 gradually moves forward and decreases in height, and the first flexible member 500 gradually resets and rebounds until it returns to the initial state.

Wherein, the kinematic chain mechanism 400 includes a virtual four-bar linkage mechanism formed by a first turning point 410, a second turning point 420, a third turning point 430, and a virtual tough fourth turning point 440 that are connected end to end.

Specifically, the first seat frame side 110 includes an integrally formed rigid upper support rod 111, a rigid lower support rod 112, and a softer second flexible member 113 that can be elastically deformed under external force and can be reset and rebounds. , The second flexible member 113 is curved, and its upper and lower ends are respectively connected to the front end of the upper support rod 111 and the front end of the lower support rod 112; the second flexible member 113 is specifically made of a toughened flexible material. The angle of 113 can be increased from 35°～42° in the initial state to 45°～60°.

Wherein, the rear part of the upper support rod 111 and the lower part of the first back frame side 210 are hinged to form a first turning point 410, and the lower part of the first back frame side 210 and the rear part of the connecting seat 300 are hinged to form a second turning point 420 , The rear part of the lower support rod 112 and the front part of the connecting seat 300 are hinged to form a third turning point 430, and a virtual tough fourth turning point 440 is formed on the second flexible member 113; wherein, as shown in FIG. 12, the first The connecting line a450 between the turning point 410 and the second turning point 420, the connecting line b460 between the second turning point 420 and the third turning point 430, the connecting line c470 between the third turning point 430 and the virtual fourth turning point 440, the virtual fourth turning point The connecting line d480 between the four rotation points 440 and the first rotation point 410 is connected end to end to form a kinematic chain mechanism 400 of a virtual four-bar linkage mechanism that realizes the back frame 200 reclining and resetting.

More specifically, the connecting hole A410b at the rear of the upper support rod 111 and the connecting hole B410a at the lower part of the first back frame side 210 are hinged to form a first pivot point 410, and the connecting hole C420a at the lower part of the first back frame side 210 and The connecting hole D420b at the rear of the connecting seat 300 is hinged to form a second rotation point 420, and the connecting hole E430a at the rear of the lower support rod 112 and the connecting hole F430b at the front of the connecting seat 300 are hinged to form a third rotating point 430. A virtual flexible fourth pivot point 440 is formed on the second flexible member 113.

In order to ensure, the lower support rod 112 is provided with a limiting protrusion 1121 at the rear, and a limiting groove 310 is provided at the front of the connecting seat 300 to accommodate the limiting protrusion 1121, and the limiting protrusion 1121 is accommodated in the limiting groove In 310 and the two are hingedly connected to form the third rotation point 430, and there is also a limiting gap in the limiting groove 310 for the limiting protrusion 1121 to rotate.

The bottom of the first back frame side 210 is sequentially bent forward to form a first bending portion 211, and upward to form a second bending portion 212. The first back frame side 210 is a hook-shaped structure with an upward opening as a whole; The upper part of the second bending portion 212 forms a first turning point 410, and the lower part forms a second turning point 420.

In addition, as shown in FIG. 11, since there are gaps between the seat frame 100 and the first flexible member 500, and between the back frame 200 and the first flexible member 500, the first flexible member 500 is bent The outer side of the 510 is fitted with a triangular-shaped flexible anti-pinch hand piece 1000. The anti-pinch piece 1000 includes a side a1100 fitted to the outer side surface of the bend 510 and a side b1200 fitted to the back frame 200. , Where the two corners formed by the side a1100 and the side c1300 are embedded in the gap, the flexible anti-pinch member 1000 can prevent the fingers from being pinched, and will not affect the deformation and reset of the first flexible member 500.

In addition, as shown in FIGS. 10-11, the connecting seat 300 is a chassis, and the lower part of the chassis is fixedly connected with a supporting air rod 700 and a supporting base 800 in turn. The connecting seat 300 is provided with a connecting hole 320 for inserting the supporting air. Rod 700.

The operation process and principle of this embodiment are as follows: as shown in Figures 11-15, the point E is the point of the center of gravity of the human body, that is, downward pressure, acting on the seat frame 100, and the point F is acting on the back frame when the human body leans back. 200 force and stress point;

When the human body leans back, the strength of the 200F point of the back frame is affected by the size of its own weight. If the body is large, the force on the 200F point of the back frame will be large, and the small weight will affect the 200F point of the back frame. The force will be small;

Specifically, when the human body leans back, point F acting on the back frame 200 is generated, and the seat frame 100 is also subjected to the downward pressure of point E; the back frame 200 rotates with the second pivot point 420 as the axis and tilts backward , The second rotation point 420 rotates backward while driving the first rotation point 410 to rotate backward. Because the first rotation point 410 is hinged on the rear of the upper support rod 111 and the lower part of the first back frame side 210, and is combined with the seat The U-shaped frame shape of the frame 100, when the first turning point 410 pulls the upper support rod 111 to rotate backward, the height of the first turning point 410 becomes higher (H changes height as shown in Figures 13 and 14), The angle between the upper support rod 111 and the lower support rod 112 becomes larger, and the seat frame 100 is rearward and raised; at the same time, the bending 510 of the first flexible member 500 receives the first rotation point 410 backward and the back frame The relative morphological change between 200 deforms and forms a buffer.

When the human body starts to lean forward, the force on the back frame 200 is gradually reduced, the back frame 200 is reset forward under the action of the kinematic chain mechanism and the first flexible member 500, and the seat frame 100 is forward and lowered in height; further In other words, when the human body is far away from the back frame 200 and only sitting on the seat frame 100, only the point E of the center of gravity of the person acting on the seat frame 100 is generated. Under the elastic reset action of the kinematic chain mechanism 400 and the first flexible member 500 , The back frame 200 is reset forward, and the height of the seat frame 100 is reduced.

It can be seen that this embodiment does not need to use a complicated mechanical adjustment method, and realizes the automatic adjustment function of the user's reclining force by the user's own weight, which is ergonomic.

The above content described in this specification is merely an illustration of the present invention. Those skilled in the technical field of the present invention can make various modifications or additions to the specific embodiments described or substitute similar methods, as long as they do not deviate from the content of the description of the present invention or exceed the scope defined by the claims. , Should belong to the protection scope of the present invention.

Claims

A seat, characterized by comprising:

The seat frame (100) has a first seat frame side (110) and a second seat frame side (120) that are symmetrically arranged, and both the first seat frame side (110) and the second seat frame side (120) have openings facing the rear U-shaped

The back frame (200), the lower part of which is connected to the seat frame (100), and has a first back frame side (210) and a second back frame side (220) symmetrically arranged;

The connecting seat (300) is simultaneously connected to the lower part of the seat frame (100) and the lower part of the back frame (200). The seat frame (100), the back frame (200) and the connecting seat (300) are connected to form a useful back Kinematic chain mechanism (400) with frame (200) backward and reset;

The first flexible member (500), whose two ends are respectively connected with the seat frame (100) and the back frame (200), can be elastically deformed and can be reset and rebound under the action of external force;

Under the action of the kinematic chain mechanism (400), when the back frame (200) receives a backward force, the seat frame (100) moves backward and is highly elevated, and the first flexible member (500) is deformed; When the force disappears or gradually decreases, the back frame (200) leans forward, the seat frame (100) gradually moves forward and the height decreases, and the first flexible member (500) gradually resets and rebounds until it returns to the initial state.
The seat according to claim 1, wherein the kinematic chain mechanism (400) comprises a first rotation point (410), a second rotation point (420), and a third rotation point ( 430) and a virtual four-bar linkage formed by a virtual tough fourth pivot point (440).
A seat according to claim 2, characterized in that: the first side (110) of the seat frame includes an upper support rod (111), a lower support rod (112) and can be elastically deformed under the action of external force. A resettable and resilient second flexible member (113), the upper and lower ends of the second flexible member (113) are respectively connected with the front end of the upper support rod (111) and the front end of the lower support rod (112).
The seat according to claim 3, characterized in that: the rear part of the upper support rod (111) and the lower part of the first back frame side (210) are hinged to form a first pivot point (410), The lower part of the back frame side (210) and the rear part of the connecting seat (300) are hinged to form a second rotation point (420), and the rear part of the lower support rod (112) and the front part of the connecting seat (300) are hinged to form a third rotation At a point (430), a virtual flexible fourth pivot point (440) is formed on the second flexible member (113).
The seat according to claim 1, wherein the first flexible member (500) is provided with a forward bending (510), and the bending (510) is located on the seat frame (100) The gap between the rear end and the front surface (230) of the back frame.
The seat according to claim 1, wherein the upper surface (130) of the seat frame, the first flexible member (500), and the front surface (230) of the back frame form a coherent curved structure. , And an integrated cloth layer is connected to the continuous curved structure.
The seat according to claim 1 or 5 or 6, characterized in that: the two ends of the first flexible member (500) are respectively connected with the upper surface (130) of the seat frame and the front surface (230) of the back frame .
The seat according to claim 7, characterized in that: the connection a (140) of the first flexible member (500) and the seat frame (100) is located in the middle and rear part of the upper surface (130) of the seat frame , The connection b (240) of the first flexible member (500) and the back frame (200) is located in the middle and lower part of the front surface (230) of the back frame.
The seat according to claim 4, characterized in that: the lower support rod (112) is provided with a limiting protrusion (1121) at the rear, and the front part of the connecting seat (300) is opened to accommodate the limiting protrusion The limiting groove (310) of (1121), the limiting protrusion (1121) is accommodated in the limiting groove (310) and the two are hingedly connected to form the third rotation point (430), and the limiting protrusion (1121) There is also a limiting gap in the bit groove (310) for rotating the limiting protrusion (1121).
The seat according to claim 4, characterized in that: the bottom of the first back frame side (210) is sequentially bent forward to form a first bending portion (211), and bent upward to form a second bending Part (212), the first back frame side (210) as a whole is a hook-shaped structure with an upward opening; the upper part of the second bending part (212) forms a first turning point (410), and the lower part forms a second turning point ( 420).
The seat according to claim 1 or 5 or 6, characterized in that: the first flexible member (500) is L-shaped or V-shaped as a whole, and includes a flexible part a (530) and a flexible part b ( 540) and a bend (510) formed between the flexible portion a (530) and the flexible portion b (540); the first flexible member (500) is made of a toughened flexible material, and the bend (510) The angle can be increased from 40 to 48° in the initial state to 60° to 80°.
The seat according to claim 3, characterized in that: the upper support rod (111), the lower support rod (112) and the second flexible member (113) are integrally formed, wherein the upper support rod (111), The lower support rod (112) is rigid, and the second flexible member (113) is softer than the upper support rod (111) and the lower support rod (112).
The seat according to claim 3, characterized in that: the second flexible member (113) is curved; the second flexible member (113) is made of a toughened flexible material, and the curved first The angle of the two flexible parts (113) can be increased from 35°-42° in the initial state to 45°-60°.
The seat according to claim 1, wherein a seat frame support (150) is connected between the first seat frame side (110) and the second seat frame side (120), and the first back frame A back frame support (250) is connected between the side (210) and the second back frame side (220).
The seat according to claim 1, wherein the lower part of the connecting seat (300) is fixedly connected with a supporting air rod (700) and a supporting base (800) in sequence.