Seat conforming to human engineering

Abstract

The invention discloses an ergonomic seat which comprises a base, a main body module and a motion device, the base is used for connecting a lifting air rod of the seat and enabling the main body module to be rotatably connected to the base through a first rotating shaft, the main body module comprises a seat body and a seat back which are rotatably connected, and the seat body comprises a bottom shell with a containing space; when the chair back is in a backward leaning state, the chair back is more inclined relative to a normal state; the motion device is located in the containing space and rotationally connected to the bottom shell and the base, and stable support is provided for rotation of the main body module. When the chair is in a rest state, the chair back is in a leaning-back state, the main body module rotates backwards, the front end of the chair seat tilts up, and the chair back further leans back until the knees and the heart are located on the same horizontal line, so that a zero-gravity posture is achieved, and comfortable lying experience is provided; according to the scheme, the zero-gravity posture is more stably, reasonably, integrally and modularly realized on the office chair.

Description

Technical Field

[0001] The present invention relates to the field of furniture, and particularly to an ergonomic seat. Background Art

[0002] In modern working scenarios, sitting for long hours in the office has caused many negative impacts on people's physical health, such as backache, neck discomfort, etc. Therefore, improving the comfort and functionality of office chairs has become an important development direction in the industry.

[0003] The functions of traditional office chairs are relatively single. Most of them can only achieve basic functions such as simple height adjustment and forward / backward tilt, and it is difficult to meet people's needs for full-body support and relaxation during long hours of work. With the improvement of living standards and the enhancement of health awareness, people expect office chairs to provide functions similar to the zero-gravity posture of electric sofas.

[0004] The zero-gravity posture of an electric sofa can adjust the human body to a state similar to weightlessness in space, making all parts of the body evenly stressed, effectively reducing spinal pressure, promoting blood circulation, and greatly relieving physical fatigue. However, currently, this zero-gravity function is mainly applied to electric sofas, and its application in the field of office chairs is still very limited.

[0005] This is mainly because the design of office chairs needs to consider more space limitations and the diversity of usage scenarios. There are many challenges in directly transplanting the zero-gravity technology of electric sofas to office chairs. For example, office chairs require a more compact structure design, more precise posture adjustment control, and higher stability and durability. Summary of the Invention

[0006] To solve the above technical problems, the present invention provides an ergonomic seat, including a base, a main body module, and a motion device. The base is used to connect the lifting gas rod of the seat and rotatably connect the main body module thereto through a first rotating shaft. The main body module includes a seat and a backrest that are rotatably connected. The seat includes a bottom shell having an accommodation space. When the backrest is in the reclined state, it is more inclined than in the normal state. The motion device is located in the accommodation space and is rotatably connected to the bottom shell and the base, providing stable support for the rotation of the main body module. When the seat is in the rest state, the backrest is in the reclined state and the main body module rotates backward, the front end of the seat tilts up, and the backrest further reclines until the knees and the heart are at the same horizontal line, thus achieving a zero-gravity posture and giving a comfortable lying experience.

[0007] The technical solution of the present invention is implemented as follows: An ergonomic seat, including: A base configured to connect the support base of the seat, and a first rotating shaft is provided on the base; The main body module includes a seat and a seat back that are rotatably connected together, the seat includes a bottom shell with an accommodating space, a avoidance groove is opened in the middle of the bottom of the bottom shell, the base enters the accommodating space through the avoidance groove, and the bottom shell is rotatably connected to the base through a first rotating shaft; A motion device is arranged in the accommodation space, and two ends of the motion device are rotatably arranged on the bottom shell and the base respectively, and the motion device is configured to provide stable support for the rotation of the base and the main module; The chair back has a normal state and a reclining state; in the normal state, the chair back is roughly vertical so that a person can sit normally; in the reclining state, the chair back is tilted backward on the seat so that a person can lie on it; The chair has a resting state. When the chair is in the resting state, the backrest is in a reclining state, the main body module rotates relative to the base, the front end of the seat is tilted up, and the backrest is further tilted backward until the knees and the heart are at the same horizontal line.

[0008] In the prior art, it is impossible to achieve a zero-gravity posture simply by relying on the reclining of the chair back and the follow-up movement of the seat. In the present solution, the chair back is used as the same module and is connected to the base by rotating together through a first rotating shaft, so that the chair back can rotate independently relative to the seat, and the chair back and seat can also rotate together on the base. Therefore, when the chair back is in a reclining state, the main body module can be further tilted backward, increasing the amplitude of the human body falling down, and at the same time, the seat can be used to lift the lower body of the human body, thereby lowering the heart height and increasing the knee height, so that the knee and the heart can be kept on the same horizontal line to achieve a zero-gravity posture; in the zero-gravity posture, the user will not feel numbness in the body even if he lies down for a long time to rest, and because the heart can supply blood to the whole body without overcoming much gravity, it can also reduce the pressure on the heart, improve the user's user experience when resting, and be healthier.

[0009] In this solution, the base and the motion device are enclosed by the main body module, thereby increasing the integrity of the chair and achieving a more compact structure; the purpose of making the seat and the back of the chair the same module is not only to achieve the modularity of the chair, but also to make full use of the larger seat itself, and to enclose the modules (base, motion device) for achieving zero-gravity posture, hiding them while maintaining the appearance of the seat itself, maintaining the integrity of the original office chair, and making the overall structure more compact by using sufficient volume inside the bottom shell, thereby achieving the seamless addition of zero-gravity posture function to an office chair with basic functions; only in the resting state will a small part of the base be exposed from the bottom shell.

[0010] In addition, this solution does not have a chassis in the traditional sense. The seat in this solution integrates the chassis function into one, and the base is not a traditional chassis. It is only a seat used to connect the support base and enable the main module to rotate.

[0011] Preferably, in the rest state, the backward tilt angle of the main body module on the base is 18 - 20°. The rotation angle of the backrest relative to the seat is 30 - 40°. After the main body module rotates further, the backrest will only tilt upward by about 30°, making the upper body of the human body fall down more, and the seat will also tilt upward by about 20° to lift the lower body of the human body, thus achieving a zero-gravity posture. Even if the backrest of the seat with poor rotation ability tilts backward by more than 20°, adding the backward tilt angle of the main body module at this time can generally achieve the zero-gravity effect.

[0012] Preferably, the motion device is rotatably arranged on the base through a second rotating shaft, and the motion device is rotatably arranged on the bottom case through a third rotating shaft. When the main body module rotates backward on the base, the positions of the first rotating shaft and the second rotating shaft are relatively fixed, and the position of the third rotating shaft changes relative to the first rotating shaft and the second rotating shaft. The first rotating shaft, the second rotating shaft and the third rotating shaft together form a state conversion triangle. When switching to the rest state, the shape of the state conversion triangle changes. The third rotating shaft can be located in front of the second rotating shaft or behind the second rotating shaft. When the third rotating shaft is located in front of the second rotating shaft, when the main body module rotates backward, the overall state conversion triangle becomes smaller. When the third rotating shaft is located behind the second rotating shaft, when the main body module rotates backward, the overall state conversion triangle becomes larger. The motion device acts on the state conversion triangle to keep it stable when the shape of the state conversion triangle changes.

[0013] Preferably, one end of the motion device is rotatably arranged on the bottom case through a third rotating shaft, and the other end of the motion device is rotatably arranged on the first rotating shaft. The motion device can also be directly arranged on the first rotating shaft. Although there is no above-mentioned state conversion triangle at this time, it can also act on the bottom case and the base to maintain the stability of the rotation of the main body module.

[0014] Preferably, a footrest is also provided on the seat. The footrest is telescopically arranged at the front part of the seat. When the seat is in the rest state, the footrest extends forward out of the seat. The footrest is used to support the legs and feet of the human body, which can improve the comfort during rest.

[0015] Preferably, in the rest state, the footrest tilts downward from back to front, and there is an included angle between the seat and the footrest. The front end of the seat is adjacent to the rear end of the footrest, and an upward convex knee support part is formed at the junction of the seat and the footrest. The included angle between the seat and the footrest makes the legs of the user bend during rest, which is more comfortable. The upward convex knee support part can support the bent knee part and also ensure the height of the knee, so that the posture is in a zero-gravity state.

[0016] Preferably, the bottom shell includes a mounting seat protruding upward, and the backrest is rotatably arranged on the mounting seat. Since this seat has no chassis, the rotation mode of the backrest is different from that of a traditional office chair. The backrest is directly rotatably arranged on the bottom shell, and the same backrest reclining effect can also be achieved.

[0017] Preferably, the seat also includes a seat portion, which is slidably arranged on the bottom shell in the front-back direction. The seat portion is rotatably connected to the backrest and is linked; when the backrest rotates backward, it drives the seat portion to slide forward. The seat portion is used to support the human buttocks; the rotation connection point between the seat portion and the backrest is located below the rotation connection point between the backrest and the bottom shell, so it can push the seat portion forward when the backrest reclines, making it more comfortable when the backrest switches to the reclined state.

[0018] Preferably, the first rotating shaft is arranged at the lower front part of the base; and in the front-back direction, the first rotating shaft is closer to the middle of the base than the front end of the base; the support base includes a lifting gas rod and a support foot, and the two ends of the lifting gas rod are respectively connected to the base and the support foot. First, if the position of the first rotating shaft is too far back, there will be a risk of tipping when the main body module rotates backward. Second, if the position of the first rotating shaft is too far forward, it is difficult for the user to drive the main body module to rotate backward only by the force of leaning back, and the bottom shell located in front of the base will approach the base when rotating, and the base is located inside the bottom shell, so interference is likely to occur; therefore, the above problems are solved by this solution.

[0019] Preferably, the first rotating shaft is located below the top of the lifting gas rod. The height of the rotation point of the main body module is reduced to lower the overall center of gravity and weaken the risk of tipping that may occur when the main body module rotates backward.

[0020] Preferably, in the front-back direction, the position where the first rotating shaft is located coincides with the lifting gas rod. The lifting gas rod is used to support the base and the main body module. Through this solution, the rotation point and the support point of the main body module are made to be in the same front-back position as much as possible to solve the problems of tipping and difficulty in reclining and driving the main body module to rotate.

[0021] Preferably, the motion device includes an elastic member and a telescopic locking member, the two ends of the elastic member are respectively arranged on the bottom shell and the base and act on the bottom shell and the base, the two ends of the telescopic locking member are respectively arranged on the bottom shell and the base and telescope when the main module rotates relative to the base; the telescopic locking member is configured to selectively lock or unlock the relative rotation of the main module and the base; the elastic member is configured to give the main module an elastic force to rotate forward from a resting state. When unlocked, the telescopic locking member can be extended and retracted with the rotation of the bottom shell and the base, and the telescopic locking member is locked after corresponding extension, so that the main module can stay in the position after rotation; the elastic member can provide elastic buffering when the main module rotates backward, and can also provide resistance to avoid discomfort caused by rotating backward too fast; in a zero-gravity state, it is inconvenient for the user to reset from the outside, and can only sit forward and reset by switching the center of gravity, so the elastic member can also provide elastic force when the user wants to reset.

[0022] Preferably, the elastic member and the telescopic locking member are parallel to each other; there are at least two elastic members, and the two elastic members are symmetrically arranged on both sides of the telescopic locking member. The symmetrical arrangement of the elastic members can make the elastic force more balanced, and the buffering and resetting can also be more balanced, providing a better user experience.

[0023] Preferably, the telescopic locking member is a gas rod with a buffering effect. The telescopic locking member can also provide a buffer, slowing down the speed of the main module when it falls backwards, and improving the experience.

[0024] Preferably, the telescopic locking member is a gas spring strut, which has buffering, locking and telescopic effects; since it is somewhat similar to the hydraulic effect, the telescopic speed is very slow, and although it can improve the experience when falling back, it will also become more difficult to reset, so the reset elastic force given by the elastic member is more needed.

[0025] Preferably, the elastic member is a spring.

[0026] Preferably, the motion device further comprises a telescopic member, the two ends of which are rotatably connected to the bottom shell and the base respectively, the elastic member is sleeved on the telescopic member, and the telescopic member is configured to limit and guide the elastic member.

[0027] Preferably, the motion device includes a driving member and a follower mechanism, the two ends of the follower mechanism are rotatably arranged on the base and the bottom shell respectively, the driving member is transmission-connected to the follower mechanism and is used to drive the follower mechanism to move, the follower mechanism is arranged in the front-back direction, and the follower mechanism drives the main body module and the base to rotate under the driving of the driving member. The driving member is controlled by the user, so that the process of switching to the rest state is more controllable, and the stability during movement can also be maintained.

[0028] Preferably, the follower mechanism is a screw-nut assembly, and the screw is in transmission connection with the driving member. The motion device can be an electric push rod.

[0029] Preferably, the driving member is a motor.

[0030] Preferably, a first convex seat is provided on the base, and a second convex seat is provided on the bottom case. Both the first convex seat and the second convex seat protrude into the accommodating space. A second rotating shaft is provided on the first convex seat, and a third rotating shaft is provided on the second convex seat. Both ends of the moving device are rotatably connected to the first convex seat and the second convex seat through the second rotating shaft and the third rotating shaft respectively.

[0031] Preferably, the first convex seat and the second convex seat are arranged at intervals in the front-rear direction and are parallel to each other. The second convex seat can be in front of the first convex seat or behind the first convex seat, corresponding to the positions of the second and third rotating shafts. Different relative positions will cause different changes in the shape of the state conversion triangle, but the effects are the same.

[0032] Preferably, the middle of the first convex seat has a first installation gap, and the middle of the second convex seat has a second installation gap; there are two second rotating shafts and two third rotating shafts. The two second rotating shafts are inserted into the first convex seat and their ends are exposed at the first installation gap. Similarly, the two third rotating shafts are exposed at the second installation gap. Both ends of the moving device are respectively arranged in the first installation gap and the second installation gap, and the exposed ends of the second rotating shaft and the third rotating shaft are inserted into the moving device. It is not certain that the inside of the moving device can allow the rotating shaft to pass through, so the moving device is rotatably installed by setting the installation gap and exposing the rotating shaft on both sides.

[0033] Preferably, the bottom case covers the outside of the base, and there is a gap between the base and the bottom case. The gaps in the front-rear direction are all only 2 mm, and the gaps in the left-right direction are all only 3 mm. Therefore, the overall integrity is better and it can prevent pinching hands.

[0034] Preferably, a surrounding plate protrudes upward around the avoidance groove at the bottom of the bottom case, the base is located between the surrounding plates, and the first rotating shaft is arranged between the surrounding plate and the base.

[0035] Preferably, from front to back, the thickness of the base increases, and the upper part of the base has an inclined surface that slopes upward. To avoid the second convex seat arranged in front of the base.

[0036] The design starting point, concept and beneficial effects of the present invention adopting the above technical solutions are: In the prior art, it is impossible to achieve the zero-gravity posture solely by the reclining of the backrest and the follow-up of the seat. In this solution, the seat and the backrest are regarded as the same module and are rotatably connected to the base together through the first rotating shaft, so that the backrest can rotate independently relative to the seat, and the backrest and the seat can also rotate together on the base. Therefore, when the backrest is in the reclined state, the main body module can be further reclined backward, increasing the amplitude of the human body falling backward. At the same time, the lower half of the human body can be lifted by the seat, so that while reducing the height of the heart, the height of the knees is increased, enabling the knees and the heart to be at the same horizontal line to achieve the zero-gravity posture. In the zero-gravity posture, the user will not feel numb in the body after lying down and resting for a long time. And because the heart can supply blood to the whole body without having to overcome much gravity, it can also relieve the pressure on the heart, improving the user experience during rest and being more healthy.

[0037] In this solution, the base and the motion device are covered by the main body module, thereby increasing the integrity of the seat and achieving a more compact structure. Among them, the purpose of regarding the seat and the backrest as the same module is not only to realize the modularization of the seat, but more importantly, to make full use of the relatively large seat itself, covering the modules (base, motion device) that can achieve the zero-gravity posture, hiding them and maintaining the appearance of the seat itself, maintaining the integrity of the original office chair, and making the overall structure more compact through the sufficient volume inside the bottom shell, so as to seamlessly add the zero-gravity posture function to an office chair with basic functions. Only in the rest state, a small part of the base will be exposed from the bottom shell.

[0038] In addition, there is no traditional chassis in this solution. The seat in this solution integrates the functions of the chassis, and the base is not a traditional chassis either, but only a supporting seat for connecting the lifting gas rod and enabling the main body module to rotate. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 It is a schematic diagram of the user sitting on the seat with the backrest in the normal state in Embodiment 1 of the present invention; Figure 2 It is a side view of the seat with the backrest in the reclined state in Embodiment 1 of the present invention; Figure 3 It is a side view of the seat in the rest state in Embodiment 1 of the present invention; Figure 4 It is a schematic diagram of the user reclining on the seat in the zero-gravity posture in the rest state in Embodiment 1 of the present invention; Figure 5 It is a schematic diagram of the bottom shell rotatably arranged on the base in Embodiment 1 of the present invention; Figure 6Schematic three - dimensional structure diagram of the motion device disposed in the bottom shell in Embodiment 1 of the present invention; Figure 7 Schematic three - dimensional structure diagram of the bottom shell and the base in Embodiment 1 of the present invention; Figure 8 Schematic three - dimensional structure diagram of the motion device disposed in the bottom shell in the rest state in Embodiment 1 of the present invention; Figure 9 Schematic diagram of the change of the state - conversion triangle when the bottom shell rotates in Embodiment 1 of the present invention; Figure 10 Schematic three - dimensional structure diagram of the bottom shell in Embodiment 1 of the present invention; Figure 11 Schematic three - dimensional structure diagram of the base and the lifting air cylinder in Embodiment 1 of the present invention Figure 1 ; Figure 12 Schematic three - dimensional structure diagram of the base and the lifting air cylinder in Embodiment 1 of the present invention Figure 2 ; Figure 13 Schematic three - dimensional structure diagram of the connection between the motion device and the base in Embodiment 1 of the present invention; Figure 14 Schematic three - dimensional structure diagram of the telescopic member in Embodiment 1 of the present invention; Figure 15 Schematic three - dimensional structure diagram of the motion device disposed in the bottom shell in Embodiment 2 of the present invention; Figure 16 Schematic three - dimensional structure diagram of the motion device disposed in the bottom shell in the rest state in Embodiment 2 of the present invention.

[0040] Each reference numeral is: base 1; lifting air cylinder 2; first rotating shaft 3; main body module 4; seat 41; backrest 42; bottom shell 5; accommodating space 51; avoiding groove 52; mounting seat 53; enclosing plate 54; footrest 6; seat part 7; second rotating shaft 8; third rotating shaft 9; first convex seat 11; first mounting gap 111; third mounting gap 112; second convex seat 12; second mounting gap 121; fourth mounting gap 122; elastic member 13; telescopic locking member 14; mounting portion 141; telescopic member 15; sleeve member 151; transverse sleeve portion 1511; longitudinal sleeve portion 1512; telescopic rod 152; abutting portion 153; arc - shaped groove 154; driving member 16; follower mechanism 17; lead screw 171; nut 172; rotating member 18. Detailed Description of the Invention

[0041] In order to more clearly understand the above - mentioned objects, features and advantages of the present invention, the present invention will be further described in detail below with reference to the drawings and specific embodiments. It should be noted that, without conflict, the embodiments of the present application and the features in the embodiments may be combined with each other.

[0042] In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. However, the present invention may be practiced in other ways than those specifically described herein. Therefore, the scope of the present invention is not limited by the specific embodiments disclosed below.

[0043] In the description of the present invention, the terms "first", "second", "third", etc. are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0044] The specific embodiments of the present invention are as follows: Embodiment

[0045] As Figures 1-5 shown, the present invention provides an ergonomic seat, comprising: A base 1 configured to connect to the support base of the seat, and a first rotating shaft 3 is provided on the base 1; A main body module 4, including a seat 41 and a backrest 42 rotatably connected together. The seat 41 includes a bottom shell 5 having an accommodation space 51. An avoidance groove 52 is formed in the middle position at the bottom of the bottom shell 5. The base 1 enters the accommodation space 51 through the avoidance groove 52, and the bottom shell 5 is rotatably connected to the base 1 through the first rotating shaft 3; A motion device, disposed in the accommodation space 51, with both ends of the motion device rotatably disposed on the bottom shell 5 and the base 1 respectively, and the motion device is configured to provide stable support for the rotation of the base 1 and the main body module 4; The backrest 42 has a normal state and a reclined state; in the normal state, the backrest 42 is substantially vertical for a person to sit normally; in the reclined state, the backrest 42 reclines backward on the seat 41 for a person to lie back; The seat has a rest state. When the seat is in the rest state, the backrest 42 is in the reclined state, the main body module 4 rotates relative to the base 1, the front end of the seat 41 tilts up, and the backrest 42 reclines further backward until the knees and the heart are at the same horizontal line.

[0046] In the prior art, it is impossible to achieve the zero-gravity posture only by the reclining of the backrest 42 and the follow-up of the seat 41. In this solution, the seat 41 and the backrest 42 are regarded as the same module and are rotatably connected to the base 1 together through the first rotating shaft 3, so that the backrest 42 can independently rotate relative to the seat 41, and the backrest 42 and the seat 41 can also rotate together on the base 1. Therefore, when the backrest 42 is in the reclined state, the main body module 4 can be further reclined backward, increasing the amplitude of the human body falling backward. At the same time, the seat 41 can lift the lower half of the human body, so as to increase the height of the knees while reducing the height of the heart, enabling the knees and the heart to be at the same horizontal line to achieve the zero-gravity posture. In the zero-gravity posture, the user will not feel numb in the body after lying down and resting for a long time. And because the heart can supply blood to the whole body without having to overcome much gravity, it can also reduce the pressure on the heart, improving the user experience during rest and being more healthy.

[0047] In this solution, the base 1 and the motion device are covered by the main body module 4, thereby increasing the integrity of the seat and achieving a more compact structure. Among them, the purpose of regarding the seat 41 and the backrest 42 as the same module is not only to realize the modularization of the seat, but also to make full use of the relatively large-volume seat 41 itself, covering the modules (the base 1 and the motion device) that realize the zero-gravity posture, hiding them and maintaining the appearance of the seat itself, maintaining the original integrity of the office chair, and making the overall structure more compact through the sufficient volume inside the bottom shell 5, so as to seamlessly add the zero-gravity posture function to an office chair with basic functions. Only in the rest state, a small part of the base 1 will be exposed from the bottom shell 5.

[0048] In addition, there is no traditional chassis in this solution. The seat 41 in this solution integrates the functions of the chassis into one. The base 1 is not a traditional chassis either, but only a supporting seat that connects and supports the lifting gas rod 2 in the base and enables the main body module 4 to rotate.

[0049] Specifically, in the rest state, the reclining angle of the main body module 4 on the base 1 is 18 - 20°, and the rotation angle of the backrest 42 relative to the seat 41 is 30 - 40°. After the main body module 4 rotates further, the backrest 42 will only tilt upward by about 30°, making the upper half of the human body fall backward more. And the seat 41 will also tilt upward by about 20° to lift the lower half of the human body, so as to achieve the zero-gravity posture. Even if the backrest 42 of the seat with poor rotation ability reclines backward by more than 20°, and then adding the reclining angle of the main body module 4, the zero-gravity effect can generally be achieved.

[0050] To achieve the zero-gravity posture in the rest state, setting the footrest 6 will have a better effect; as Figure 4As shown, a footrest 6 is also provided on the seat 41. The footrest 6 is telescopically arranged at the front of the seat 41. When the seat is in the rest state, the footrest 6 can extend forward out of the seat 41. The footrest 6 is used to support the legs and feet of the human body, which can improve the comfort during rest. The footrest 6 can also be retracted into the seat 41 when the user is sitting normally. Further, in the rest state, the footrest 6 inclines downward from back to front, and there is an included angle between the seat 41 and the footrest 6. The front end of the seat 41 is adjacent to the rear end of the footrest 6, and an upward convex knee support portion is formed at the junction of the seat 41 and the footrest 6. The included angle between the seat 41 and the footrest 6 makes the user's legs bend during rest, which is more comfortable. The upward convex knee support portion can support the bent knee part and also ensure the height of the knees, making the posture in a zero-gravity state.

[0051] Different from traditional seats, the backrest 42 is connected to the seat 41. Specifically, as Figure 2 , 3 , as shown in FIGS. 6 - 10, the bottom shell 5 includes a mounting seat 53 protruding upward, and the backrest 42 is rotatably arranged on the mounting seat 53. Since this seat has no chassis, the rotation mode of the backrest 42 is different from that of traditional office chairs. The backrest 42 is directly rotatably arranged on the bottom shell 5, and the same backrest 42 reclining effect can also be achieved. The seat 41 further includes a seat part 7. The seat part 7 is slidably arranged on the bottom shell 5 in the front - rear direction. The seat part 7 extends upward and is rotatably connected and linked to the lower end part of the backrest 42. When the backrest 42 rotates backward, it drives the seat part 7 to slide forward. The seat part 7 is used to support the human buttocks. The rotation connection point between the seat part 7 and the backrest 42 is located below the rotation connection point between the backrest 42 and the mounting seat 53. Therefore, when the backrest 42 reclines backward, it can push the seat part 7 forward, making it more comfortable when the backrest 42 switches to the reclined state.

[0052] Furthermore, the bottom shell 5 covers the base 1, and there is a gap between the base 1 and the bottom shell 5. Specifically, the gaps in the front - rear direction are only 2 mm, and the gaps in the left - right direction are only 3 mm. Therefore, the overall integrity is better and it can prevent pinching hands. Around the avoidance groove 52 at the bottom of the bottom shell 5, a surrounding plate 54 protrudes upward. The base 1 is located between the surrounding plates 54. The first rotating shaft 3 is arranged between the surrounding plate 54 and the base 1. The first rotating shaft 3 is arranged in the left - right direction, and there are two first rotating shafts 3. The two first rotating shafts 3 are respectively located on the left and right end faces of the base 1 and are rotatably connected to the left and right plates of the surrounding plate 54.

[0053] The setting position of the first rotating shaft 3 will also affect the stability when switching to the rest state, as Figures 9-12As shown, in this embodiment, the first rotating shaft 3 is arranged at the front lower part of the base 1; and in the front-back direction, the first rotating shaft 3 is closer to the middle of the base 1 than the front end of the base 1; the support base includes a lifting air rod 2 and a support foot, and both ends of the lifting air rod 2 are respectively connected to the base 1 and the support foot; in the height direction, the first rotating shaft 3 is located below the top of the lifting air rod 2, and in the front-back direction, the position of the first rotating shaft 3 coincides with that of the lifting air rod 2; firstly, if the position of the first rotating shaft 3 is too far back, there will be a risk of tipping when the main body module 4 rotates backward. Secondly, if the position of the first rotating shaft 3 is too far forward, it will be difficult for the user to drive the main body module 4 to rotate backward only by the force of leaning backward, and the bottom shell 5 located in front of the base 1 will approach the base 1 during rotation, and the base 1 is located inside the bottom shell 5, so interference is likely to occur; therefore, the above problems are solved by this solution. The position of the first rotating shaft 3 in the height direction reduces the rotation point height of the main body module 4, thereby reducing the overall center of gravity and weakening the risk of tipping that may occur when the main body module 4 rotates backward. The lifting air rod 2 is used to support the base 1 and the main body module 4. By the position of the first rotating shaft 3 in the front-back direction, the rotation point of the main body module 4 and the support point are made to be in the same front-back position as much as possible, thereby solving the problems of tipping and difficulty in driving the rotation of the main body module 4 by lying back. At the same time, as Figure 7 , 9 shown, the length by which the base 1 protrudes forward from the lifting air rod 2 is less than the length by which it protrudes backward from the lifting air rod 2.

[0054] Furthermore, the moving device is rotatably arranged on the base 1 through a second rotating shaft 8, and the moving device is rotatably arranged on the bottom shell 5 through a third rotating shaft 9; when the main body module 4 rotates backward on the base 1, the positions of the first rotating shaft 3 and the second rotating shaft 8 are relatively fixed, and the position of the third rotating shaft 9 changes relative to the first rotating shaft 3 and the second rotating shaft 8; the first rotating shaft 3, the second rotating shaft 8 and the third rotating shaft 9 together form a state conversion triangle, and when switching to the rest state, the shape of the state conversion triangle changes; the third rotating shaft 9 can be located in front of the second rotating shaft 8 or behind the second rotating shaft 8. When the third rotating shaft 9 is located in front of the second rotating shaft 8, when the main body module 4 rotates backward, the overall state conversion triangle becomes smaller; when the third rotating shaft 9 is located behind the second rotating shaft 8, when the main body module 4 rotates backward, the overall state conversion triangle becomes larger; the moving device acts on the state conversion triangle so that it can remain stable when the shape of the state conversion triangle changes.

[0055] In addition, other setting schemes of the motion device are also feasible. For example, one end of the motion device is rotatably arranged on the bottom case 5 through a third rotating shaft 9, and the other end of the motion device is rotatably arranged on the first rotating shaft 3; that is, the motion device can also be directly arranged on the first rotating shaft 3. At this time, although there is no above-mentioned state conversion triangle, it can still act on the bottom case 5 and the base 1 to maintain the rotational stability of the main body module 4. In this embodiment, the first setting scheme of the motion device is still selected.

[0056] The installation of the second rotating shaft 8 and the third rotating shaft 9 is as follows: As Figure 6 , 8 As shown in FIGS. -12, the base 1 is provided with a first convex seat 11, and the bottom case 5 is provided with a second convex seat 12. Both the first convex seat 11 and the second convex seat 12 protrude into the accommodation space 51. The first convex seat 11 is provided with the second rotating shaft 8, and the second convex seat 12 is provided with the third rotating shaft 9. Both ends of the motion device are rotatably connected to the first convex seat 11 and the second convex seat 12 through the second rotating shaft 8 and the third rotating shaft 9 respectively; the first convex seat 11 and the second convex seat 12 are arranged at intervals in the front-rear direction and are parallel to each other. The second convex seat 12 can be in front of the first convex seat 11 or behind the first convex seat 11, corresponding to the positions of the second and third rotating shafts 9. Different relative positions will cause different changes in the shape of the state conversion triangle, but the effects are the same. In this embodiment, the second convex seat 12 is located in front of the first convex seat 11, that is, the third rotating shaft 9 is located in front of the second rotating shaft 8. When switched to the rest state, the third rotating shaft 9 moves upward and backward and approaches the second rotating shaft 8 to change the shape of the state conversion triangle and the area of the state conversion triangle becomes smaller. From front to back, the thickness of the base 1 increases, and the upper part of the base 1 has an inclined surface that slopes upward to avoid the second convex seat 12 arranged in front of the base 1.

[0057] The motion device is specifically as follows: As Figure 6 , 8As shown in FIG. 14, the exercise device includes an elastic member 13 arranged in the front-rear direction and a telescopic locking member 14. The two ends of the elastic member 13 are respectively arranged on the bottom shell 5 and the base 1 and act on the bottom shell 5 and the base 1. The two ends of the telescopic locking member 14 are respectively arranged on the bottom shell 5 and the base 1 and telescopically move when the main body module 4 rotates relative to the base 1. The telescopic locking member 14 is configured to selectively lock or unlock the relative rotation of the main body module 4 and the base 1. The elastic member 13 is configured to give the main body module 4 an elastic force to rotate forward from the rest state. When unlocked, the telescopic locking member 14 can telescopically move as the bottom shell 5 and the base 1 rotate. After corresponding telescopic movement, the telescopic locking member 14 locks, enabling the main body module 4 to stay at the rotated position. The elastic member 13 can provide elastic buffering when the main body module 4 rotates backward and can also give resistance to avoid discomfort caused by too fast backward rotation. In the zero-gravity state, it is inconvenient for the user to borrow external force to reset from the outside. The user can only sit forward and rely on the switching of the center of gravity to reset. Therefore, the elastic member 13 can also provide elastic force when the user wants to reset.

[0058] Specifically, the elastic member 13 is a spring, and the telescopic locking member 14 is a gas rod with a buffering effect, specifically a gas spring strut. The gas spring strut has buffering, locking, and telescopic effects. The telescopic locking member 14 can also provide buffering to slow down the speed when the main body module 4 falls backward and improve the experience. That is, since the gas spring strut is somewhat similar to the hydraulic effect and the telescopic speed is very slow, although it can improve the experience when falling backward, it will become more difficult to reset. Therefore, the elastic member 13 is more needed to give the reset elastic force. The elastic member 13 and the telescopic locking member 14 are parallel to each other. There are at least two elastic members 13, and the two elastic members 13 are symmetrically arranged on both sides of the telescopic locking member 14. The elastic members 13 are symmetrically arranged, applying the elastic force more evenly, and the buffering and resetting can be more balanced, and the experience is better.

[0059] The exercise device further includes a telescopic member 15. The two ends of the telescopic member 15 are respectively rotatably connected to the bottom shell 5 and the base 1. The elastic member 13 is sleeved on the telescopic member 15. The telescopic member 15 is configured to limit and guide the elastic member 13; it is used to install the elastic member 13 and give guidance and limitation to the elastic member 13. Specifically, the telescopic member 15 includes a sleeve member 151 and a telescopic rod 152. The sleeve member 151 includes a horizontal sleeve portion 1511 and a vertical sleeve portion 1512. The telescopic rod 152 is inserted into the vertical sleeve portion 1512. An abutting portion 153 is provided at the end of the telescopic rod 152 exposed from the sleeve member 151. The abutting portion 153 has an arc-shaped groove 154. The horizontal sleeve portion 1511 is sleeved on the second rotating shaft 8. The abutting portion 153 abuts against the third rotating shaft 9 and the third rotating shaft 9 is located in the arc-shaped groove 154. The elastic member 13 abuts between the horizontal sleeve portion 1511 and the abutting portion 153.

[0060] The first boss 11 has a first installation gap 111 in the middle, and the second boss 12 has a second installation gap 121 in the middle; there are two second shafts 8 and two third shafts 9, and the two second shafts 8 are inserted into the upper end of the first boss 11 and their ends are exposed at the first installation gap 111. Similarly, the two third shafts 9 are exposed at their ends at the second installation gap 121; the two ends of the telescopic locking member 14 are respectively arranged in the first installation gap 111 and the second installation gap 121, and the two ends of the telescopic locking member 14 are provided with mounting parts 141, which protrude in the left and right directions and are sleeve-shaped, and the exposed ends of the second shaft 8 and the third shaft 9 are inserted in the mounting parts 141. A third installation gap 112 is also provided on the first convex seat 11, and a fourth installation gap 122 is also provided on the second convex seat 12. There are two third installation gaps 112 and two fourth installation gaps 122. Both ends of the telescopic member 15 are located in the third installation gap 112 and the fourth installation gap 122, respectively, and are connected to the second rotating shaft 8 exposed at the third installation gap 112 and the third rotating shaft 9 exposed at the fourth installation gap 122, respectively. The transverse sleeve portion 1511 of the telescopic member 15 is located at the third installation gap 112, and the abutment portion 153 of the telescopic member 15 is located at the fourth installation gap 122. The first convex seat 11 and the second convex seat 12 each include four raised portions with shaft holes under the division of the installation gap.

[0061] Embodiment 2: The difference between this embodiment and embodiment 1 is only the difference in the motion device. The motion device in this embodiment includes a driving member 16 and a follower mechanism 17; specifically: like Figure 15 , 16 As shown, the motion device includes a driving member 16 and a follower mechanism 17, the two ends of the follower mechanism 17 are rotatably arranged on the base 1 and the bottom shell 5 respectively, the driving member 16 is transmission-connected to the follower mechanism 17 and is used to drive the follower mechanism 17 to move, the follower mechanism 17 is arranged along the front-to-back direction, and the follower mechanism 17 drives the main body module 4 and the base 1 to rotate under the drive of the driving member 16; the driving member 16 is controlled by the user, so that the process of switching to the rest state is more controllable, and the stability during exercise can also be maintained.

[0062] The motion device can be an electric push rod, that is, the driving member 16 is a motor, the follower mechanism 17 is a screw nut assembly, the screw 171 is connected to the driving member 16 in a transmission manner and is connected to the third rotating shaft 9 together with the rotation, and the nut 172 is connected to the second rotating shaft 8 in a rotational manner. The driving member 16 is fixedly connected to a rotating member 18, the rotating member 18 is arranged in the second installation gap 121, the ends of the two third rotating shafts 9 are inserted in the rotating member 18, and the end of the follower mechanism 17 away from the driving member 16 is located in the first installation gap 111, and the ends of the two second rotating shafts 8 are inserted therein.

Claims

1. An ergonomic seat, characterized in that, include: A base, configured as a support base connected to the seat, with a first rotating shaft provided on the base; The main body module includes a seat and a seat back that are rotatably connected together, the seat includes a bottom shell with an accommodating space, a avoidance groove is opened in the middle of the bottom of the bottom shell, the base enters the accommodating space through the avoidance groove, and the bottom shell is rotatably connected to the base through a first rotating shaft; A motion device is arranged in the accommodation space, and two ends of the motion device are rotatably arranged on the bottom shell and the base respectively, and the motion device is configured to provide stable support for the rotation of the base and the main module; The chair back has a normal state and a reclining state; in the normal state, the chair back is roughly vertical so that a person can sit normally; in the reclining state, the chair back is tilted backward on the seat so that a person can lie on it; The chair has a resting state. When the chair is in the resting state, the backrest is in a reclining state, the main body module rotates relative to the base, the front end of the seat is tilted up, and the backrest is further tilted backward until the knees and the heart are at the same horizontal line.

2. The ergonomic seat according to claim 1, characterized in that: In the resting state, the main module has a backward tilt angle of 18-20° on the base.

3. The ergonomic seat according to claim 1, characterized in that: The moving device is rotatably arranged on the base via the second rotating shaft, and the moving device is rotatably arranged on the bottom shell via the third rotating shaft; when the main body module rotates backward on the base, the positions of the first rotating shaft and the second rotating shaft are relatively fixed, and the position of the third rotating shaft relative to the first rotating shaft and the second rotating shaft changes.

4. The ergonomic seat according to claim 1, characterized in that: One end of the motion device is rotatably arranged on the bottom shell through the third rotation shaft, and the other end of the motion device is rotatably arranged on the first rotation shaft.

5. The ergonomic seat according to claim 1, characterized in that: The seat is also provided with a footrest, which is telescopically arranged at the front part of the seat. When the seat is in a resting state, the footrest extends forward from the seat.

6. The ergonomic seat according to claim 5, wherein: In a resting state, the footrest is tilted downward from the back to the front, and an angle is formed between the seat and the footrest; the front end of the seat is adjacent to the rear end of the footrest, and a knee supporting part protruding upward is formed at the junction of the seat and the footrest.

7. The ergonomic seat according to claim 1, characterized in that: The bottom shell comprises a mounting seat protruding upward, and the chair back is rotatably arranged on the mounting seat.

8. The ergonomic seat according to claim 7, characterized in that: The chair seat also includes a seat part, which is arranged on the bottom shell for sliding forward and backward movement, and is rotationally connected and linked with the chair back; when the chair back rotates backward, the seat part is driven to slide forward.

9. The ergonomic seat according to claim 1, characterized in that: The first rotating shaft is arranged at the front lower part of the base; and in the front-to-back direction, the first rotating shaft is closer to the middle part of the base than the front end of the base; the supporting base includes a lifting gas rod and a supporting foot, and the two ends of the lifting gas rod are respectively connected to the base and the supporting foot.

10. The ergonomic seat according to claim 9, wherein: The first rotating shaft is located below the top of the lifting gas rod.

11. The ergonomic seat according to claim 1, characterized in that: The motion device includes an elastic member and a telescopic locking member, wherein two ends of the elastic member are respectively arranged on the bottom shell and the base and act on the bottom shell and the base, and two ends of the telescopic locking member are respectively arranged on the bottom shell and the base and telescope when the main body module rotates relative to the base; the telescopic locking member is configured to selectively lock or unlock the relative rotation between the main body module and the base; the elastic member is configured to give the main body module an elastic force to rotate forward from a resting state.

12. The ergonomic seat according to claim 11, characterized in that: The elastic member and the telescopic locking member are parallel to each other; there are at least two elastic members, and the two elastic members are symmetrically arranged on both sides of the telescopic locking member.

13. The ergonomic seat according to claim 11, characterized in that: The telescopic locking piece is a gas rod with a buffering effect.

14. The ergonomic seat according to claim 13, wherein: The telescopic locking piece is a gas spring strut.

15. The ergonomic seat according to claim 11, wherein: The elastic member is a spring.

16. The ergonomic seat according to claim 11, characterized in that: The motion device further includes a telescopic member. Two ends of the telescopic member are respectively rotatably connected to the bottom case and the base. An elastic member is sleeved on the telescopic member. The telescopic member is configured to limit and guide the elastic member.

17. The ergonomic seat according to claim 1, wherein: The motion device includes a driving member and a follower mechanism. Two ends of the follower mechanism are respectively rotatably arranged on the base and the bottom case. The driving member is drivingly connected to the follower mechanism and is used to drive the follower mechanism to move. The follower mechanism is arranged in the front-rear direction. The follower mechanism drives the main body module and the base to rotate under the drive of the driving member.

18. The ergonomic seat according to claim 17, characterized in that: The follower mechanism is a lead screw and nut assembly, and the lead screw is drivingly connected to the driving member.

19. The ergonomic seat according to claim 17, characterized in that: The driving member is a motor.

20. The ergonomic seat according to claim 1, wherein: A first convex seat is provided on the base, and a second convex seat is provided on the bottom case. Both the first convex seat and the second convex seat protrude into the accommodating space. A second rotating shaft is provided on the first convex seat, and a third rotating shaft is provided on the second convex seat. Two ends of the motion device are respectively rotatably connected to the first convex seat and the second convex seat through the second rotating shaft and the third rotating shaft.

21. The ergonomic seat according to claim 20, wherein: The first convex seat and the second convex seat are arranged at intervals in the front-rear direction and are parallel to each other.

22. The ergonomic seat according to claim 20, characterized in that: The middle part of the first convex seat has a first installation gap, and the middle part of the second convex seat has a second installation gap; there are two second rotating shafts and two third rotating shafts. The two second rotating shafts are inserted on the first convex seat and their ends are exposed at the first installation gap. Similarly, the two third rotating shafts are exposed at the second installation gap. Two ends of the motion device are respectively arranged in the first installation gap and the second installation gap, and the exposed ends of the second rotating shaft and the third rotating shaft are inserted into the motion device.

23. The ergonomic seat according to claim 1, wherein: The bottom case covers the outside of the base, and there is a gap between the base and the bottom case.

24. The ergonomic seat according to claim 23, wherein: A surrounding plate protrudes upward around the avoidance groove at the bottom of the bottom case. The base is located between the surrounding plates, and the first rotating shaft is arranged between the surrounding plate and the base.

25. The ergonomic seat according to claim 1, characterized in that: From front to back, the thickness of the base increases, and the upper part of the base has an inclined surface that slopes upward.

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