A device for achieving zero-gravity attitude

Abstract

This utility model discloses a device for achieving a zero-gravity posture, including a fixed base, a rotating base, an elastic element, and a telescopic locking element. The fixed base is connected to the lifting gas spring of the chair, and the rotating base is connected to the backrest and seat of the chair, and is rotatably connected to the fixed base. The elastic element and the telescopic locking element are rotatably connected to the fixed base and the rotating base, respectively. The telescopic locking element extends and retracts with the rotation of the rotating base and can lock the rotating base in the rotated position, and can also provide a buffer for the rotation of the rotating base. The elastic element can provide a spring force for the rotating base to rotate forward. Through the above modular device, the office chair can achieve a zero-gravity posture, and maintain stability during switching and provide assistance during restoration, which has the effects of preventing tipping and being easy to use.

Description

Technical Field

[0001] This utility model relates to the field of furniture, and in particular to a device for achieving a zero-gravity posture. Background Technology

[0002] In modern work environments, prolonged sitting at a desk has numerous negative impacts on people's health, such as lower back pain and neck discomfort. Therefore, improving the comfort and functionality of office chairs has become an important development direction for the industry.

[0003] Traditional office chairs have relatively limited functions, mostly offering only basic features like height adjustment and reclining, which are insufficient to meet people's needs for comprehensive body support and relaxation during long hours of work. With rising living standards and increased health awareness, people expect office chairs to provide functions similar to the zero-gravity posture of electric sofas.

[0004] The zero-gravity posture of electric sofas can adjust the human body to a state similar to weightlessness in space, allowing for even pressure distribution across all parts of the body, effectively reducing spinal pressure, promoting blood circulation, and greatly alleviating physical fatigue. However, currently, this zero-gravity function is mainly used in 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 constraints and the diversity of usage scenarios, and 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 structural design, more precise posture adjustment control, and higher stability and durability.

[0006] In particular, office chairs have a high center of gravity and, unlike electric sofas, do not have a self-locking mechanism and actuator. Therefore, when leaning back at a large angle, they are prone to discomfort due to falling back too quickly, or even tipping over. This is one of the difficulties that office chairs need to overcome to achieve a zero-gravity posture. Summary of the Invention

[0007] To address the aforementioned technical problems, this utility model provides a device for achieving a zero-gravity posture, comprising a fixed base, a rotating base, an elastic element, and a telescopic locking element. The fixed base is connected to the support base of the chair, and the rotating base is connected to the backrest and seat of the chair, with the rotating base rotatably connected to the fixed base. The elastic element and the telescopic locking element are rotatably connected to the fixed base and the rotating base, respectively. The telescopic locking element extends and retracts with the rotation of the rotating base and can lock the rotating base in the rotated position, while also providing a buffer for the rotation of the rotating base. The elastic element provides a spring force for the rotating base to rotate forward. Through the above modular device, the office chair can achieve a zero-gravity posture, maintain stability during switching, and provide assistance during restoration, thus preventing tipping and facilitating use.

[0008] The technical solution of this utility model is implemented as follows:

[0009] A device for achieving a zero-gravity posture includes a fixed base, a rotating base, an elastic element, and a telescopic locking element. The fixed base is used to connect a support base of a seat, and the rotating base is used to connect the backrest and seat of the seat. The rotating base is rotatably mounted on the fixed base. The two ends of the elastic element are rotatably mounted on the fixed base and the rotating base, respectively, and act on the fixed base and the rotating base. The two ends of the telescopic locking element are rotatably mounted on the fixed base and the rotating base, respectively, and extend and retract with the rotation of the rotating base. The telescopic locking element is configured to selectively lock or unlock the relative rotation of the rotating base and the fixed base and to provide cushioning when the rotating base rotates. The elastic element is configured to provide a spring force for the rotating base to rotate forward.

[0010] When the telescopic locking mechanism unlocks, the rotating seat can rotate relative to the fixed seat, causing the backrest and seat to rotate together. This provides an angle for the backrest and seat to tilt backward, allowing the upper body to lower further and rise, bringing the heart and knees to the same height, thus achieving a zero-gravity posture and improving comfort during rest. The telescopic locking mechanism extends and retracts with the rotating seat when unlocked, and after locking, it keeps the rotating seat in the rotated position, ensuring stability after the state transition. Both the telescopic locking mechanism and the elastic component provide cushioning during backward rotation, preventing excessive backward tilting and improving the user experience. In a zero-gravity state, it is inconvenient for the user to use external force to return to the starting position; they can only return by sitting forward and shifting their center of gravity. Therefore, the elastic component also provides elasticity when the user wants to return to the starting position. Ultimately, this achieves a stable zero-gravity posture while on the office chair. Furthermore, this solution is applicable to different types of chairs, offering strong adaptability and modularity, adding zero-gravity posture functionality without altering the original chair.

[0011] Preferably, the elastic element and the telescopic locking element are arranged in the front-to-back direction and are parallel to each other. The front-to-back arrangement of the elastic element and the telescopic locking element is to accommodate the rotation of the rotating seat.

[0012] Preferably, there are at least two elastic elements, symmetrically arranged on both sides of the telescopic locking element. Symmetrical arrangement of the elastic elements ensures more even application of elastic force, better balance of cushioning and reset, and a superior user experience.

[0013] As a preferred option, the telescopic locking component is a gas spring strut. The gas spring strut provides cushioning, locking, and telescopic effects; however, because it is somewhat similar to a hydraulic system, its telescopic speed is very slow. While it can improve the user experience when tilting back, the slow return speed makes it more difficult to maneuver, thus requiring a more effective restoring force from the elastic component.

[0014] Preferably, the elastic element is a spring.

[0015] Preferably, the system also includes a telescopic component, with its two ends rotatably connected to a fixed base and a rotating base, respectively. An elastic element is fitted onto the telescopic component, and the telescopic component is configured to limit and guide the elastic element. This is used to install the elastic element and to guide and limit its movement.

[0016] Preferably, the telescopic component includes a sleeve and a telescopic rod. The sleeve includes a transverse sleeve portion and a longitudinal sleeve portion. The telescopic rod is inserted into the longitudinal sleeve portion, and the end of the telescopic rod protruding from the sleeve is provided with an abutment portion, which has an arc-shaped groove. A first rotating shaft is provided on the fixed base, and a second rotating shaft is provided on the rotating base. The transverse sleeve portion is sleeved on the first rotating shaft, and the abutment portion abuts against the second rotating shaft, with the second rotating shaft located in the arc-shaped groove. An elastic element abuts between the transverse sleeve portion and the abutment portion.

[0017] Preferably, the fixed seat is provided with a first protrusion, the rotating seat is provided with a second protrusion, the first protrusion is provided with a first rotating shaft, the second protrusion is provided with a second rotating shaft, and the two ends of the elastic element and the telescopic locking element are respectively rotatably connected to the first protrusion and the second protrusion through the first rotating shaft and the second rotating shaft.

[0018] Preferably, the first boss and the second boss are arranged at a distance from each other and are parallel to each other.

[0019] Preferably, the first boss has a first mounting gap in the middle, and the second boss has a second mounting gap in the middle; there are two first rotating shafts and two second rotating shafts, with the two first rotating shafts inserted into the first boss and their ends protruding at the first mounting gap, and similarly, the two second rotating shafts protruding at the second mounting gap; the two ends of the telescopic locking member are respectively disposed in the first mounting gap and the second mounting gap, and both ends of the telescopic locking assembly are provided with mounting portions, which protrude in the left-right direction and are sleeve-shaped, with the protruding ends of the first and second rotating shafts inserted into the mounting portions. The telescopic locking member cannot allow the rotating shafts to pass through, therefore it is installed by setting mounting gaps and exposing the rotating shafts on both sides.

[0020] Preferably, the first boss has a third mounting gap, and the second boss has a fourth mounting gap. The two ends of the elastic element are located in the third mounting gap and the fourth mounting gap, respectively, and are connected to the first rotating shaft exposed at the third mounting gap and the second rotating shaft exposed at the fourth mounting gap, respectively. This cleverly achieves the installation of the elastic element.

[0021] Preferably, the rotating base covers the fixed base, with a gap between them. The gaps in the front-to-back direction are only 2mm, and the gaps in the left-to-right direction are only 3mm, thus improving the overall integrity, preventing finger pinching, and achieving a modular effect.

[0022] The design starting point, concept, and beneficial effects of this utility model, which adopts the above technical solution, are as follows:

[0023] When the telescopic locking mechanism unlocks, the rotating seat can rotate relative to the fixed seat, causing the backrest and seat to rotate together. This provides an angle for the backrest and seat to tilt backward, allowing the upper body to lower further and rise, bringing the heart and knees to the same height, thus achieving a zero-gravity posture and improving comfort during rest. The telescopic locking mechanism extends and retracts with the rotating seat when unlocked, and after locking, it keeps the rotating seat in the rotated position, ensuring stability after the state transition. Both the telescopic locking mechanism and the elastic component provide cushioning during backward rotation, preventing excessive backward tilting and improving the user experience. In a zero-gravity state, it is inconvenient for the user to use external force to return to the starting position; they can only return by sitting forward and shifting their center of gravity. Therefore, the elastic component also provides elasticity when the user wants to return to the starting position. Ultimately, this achieves a stable zero-gravity posture while on the office chair. Furthermore, this solution is applicable to different types of chairs, offering strong adaptability and modularity, adding zero-gravity posture functionality without altering the original chair. Attached Figure Description

[0024] Figure 1 This is a schematic diagram showing the user sitting on the chair in its normal position in an embodiment of the present invention;

[0025] Figure 2 This is a side view of the seat with the backrest reclined in an embodiment of the present invention.

[0026] Figure 3 This is a side view of the seat in a resting state in an embodiment of the present invention;

[0027] Figure 4 This is a schematic diagram of a user lying on the chair in a zero-gravity posture during a resting state, as described in an embodiment of the present invention.

[0028] Figure 5 This is a schematic diagram showing the rotating seat rotating on the fixed seat in an embodiment of the present invention;

[0029] Figure 6 This is a three-dimensional structural diagram of the stable state component being disposed in the rotating seat in an embodiment of the present invention;

[0030] Figure 7 This is a three-dimensional structural diagram of the rotating seat and the fixed seat in an embodiment of the present invention;

[0031] Figure 8 This is a three-dimensional structural diagram of the stable state component in the resting state of the present invention, which is arranged in the rotating seat in an embodiment.

[0032] Figure 9 This is a schematic diagram illustrating the state transition triangle changes when the rotating seat rotates in an embodiment of the present invention;

[0033] Figure 10 This is a three-dimensional structural diagram of the rotating seat in an embodiment of the present invention;

[0034] Figure 11 This is a three-dimensional structural diagram of the fixed base and the lifting gas spring in the embodiment of this utility model. Figure 1 ;

[0035] Figure 12 This is a three-dimensional structural diagram of the fixed base and the lifting gas spring in the embodiment of this utility model. Figure 2 ;

[0036] Figure 13 This is a three-dimensional structural diagram of the connection between the stable state component and the fixed base in an embodiment of the present invention;

[0037] Figure 14 This is a three-dimensional structural diagram of the telescopic component in an embodiment of the present invention.

[0038] The attached figures are labeled as follows: fixed seat 1; lifting gas spring 2; first rotating shaft 3; main body module 4; seat 41; backrest 42; rotating seat 5; accommodating space 51; clearance groove 52; mounting seat 53; surrounding plate 54; footrest 6; seat part 7; first rotating shaft 8; second rotating shaft 9; first protrusion 11; first installation gap 111; third installation gap 112; second protrusion 12; second installation gap 121; fourth installation gap 122; elastic element 13; telescopic locking element 14; mounting part 141; telescopic element 15; sleeve part 151; transverse sleeve part 1511; longitudinal sleeve part 1512; telescopic rod 152; abutment part 153; arc-shaped groove 154. Detailed Implementation

[0039] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0040] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present invention is not limited to the specific embodiments disclosed below.

[0041] In the description of this utility model, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0042] The specific implementation of this utility model is as follows:

[0043] like Figure 2-4 As shown, this utility model provides a device for achieving a zero-gravity posture, including a fixed base 1, a rotating base 5, an elastic element 13, and a telescopic locking element 14. The fixed base 1 is used to connect the support base of the seat, and the rotating base 5 is used to connect the backrest 42 and the seat 7 of the seat. The rotating base 5 is rotatably mounted on the fixed base 1. The two ends of the elastic element 13 are respectively rotatably mounted on the fixed base 1 and the rotating base 5 and act on the fixed base 1 and the rotating base 5. The two ends of the telescopic locking element 14 are respectively rotatably mounted on the fixed base 1 and the rotating base 5 and extend and retract with the rotation of the rotating base 5. The telescopic locking element 14 is configured to selectively lock or unlock the relative rotation of the rotating base 5 and the fixed base 1 and provide a buffer when the rotating base 5 rotates. The elastic element 13 is configured to provide a spring force for the rotating base 5 to rotate forward.

[0044] When the telescopic locking member 14 is unlocked, the rotating seat 5 can rotate relative to the fixed seat 1, and can drive the backrest 42 and seat 7 to rotate together, providing the backrest 42 and seat 7 with an angle to tilt backward, so that the upper body of the human body is lowered further and the upper body of the human body is raised, so that the heart and knees reach the same height level, thereby achieving a zero-gravity posture and improving the comfort of resting; when the telescopic locking member 14 is unlocked, it can extend and retract with the rotation of the rotating seat 5, and after locking, it can keep the rotating seat 5 in the rotated position, so as to maintain stability after the state switch; both the telescopic locking member 14 and the elastic member 13 can provide cushioning when rotating backward, preventing the backward speed from falling over too quickly, thereby improving the user experience; in the zero-gravity state, it is inconvenient for the user to use external force to reset, and can only sit forward and reset by shifting the center of gravity, so the elastic member 13 can also provide elasticity when the user wants to reset; ultimately, a stable zero-gravity posture can be switched on the office chair. Moreover, this solution is applicable to different seats, has strong adaptability, achieves a modular effect, and adds the function of zero-gravity posture without changing the original seat.

[0045] The support base includes a lifting air rod 2 and a support foot (not shown). The two ends of the lifting air rod 2 are connected to the fixed base 1 and the support foot, respectively.

[0046] The device is applied to an ergonomic chair, specifically, the chair includes:

[0047] The fixed seat 1 is configured to connect the lifting gas spring 2 to the seat, and the fixed seat 1 is provided with a first rotating shaft 3;

[0048] The main module 4 includes a seat 41 and a backrest 42 that are rotatably connected together. The seat 41 includes a rotating seat 5 with a receiving space 51. A clearance groove 52 is provided at the middle of the bottom of the rotating seat 5. The fixed seat 1 enters the receiving space 51 through the clearance groove 52. The rotating seat 5 is rotatably connected to the fixed seat 1 through the first rotating shaft 3.

[0049] A stabilizing component is disposed in the accommodating space 51. The two ends of the stabilizing component are respectively rotatably mounted on the rotating seat 5 and the fixed seat 1. The stabilizing component is configured to provide stable support for the rotation of the fixed seat 1 and the main body module 4.

[0050] The chair back 42 has a normal state and a reclining state; in the normal state, the chair back 42 is roughly vertical, so that the human body can sit normally; in the reclining state, the chair back 42 tilts backward on the seat 41, so that the human body can lie back.

[0051] The seat has a resting position. When the seat is in the resting position, the backrest 42 is in a reclining position, the main body module 4 rotates relative to the fixed seat 1, the front end of the seat 41 is raised, and the backrest 42 is further tilted back until the knees and heart are at the same level.

[0052] In existing technologies, relying solely on the reclining of the backrest 42 and the accompaniment of the seat 41 is insufficient to achieve a zero-gravity posture. In this solution, the seat 41 and backrest 42 are treated as a single module, connected to the fixed base 1 via the first pivot 3. This allows the backrest 42 to rotate independently relative to the seat 41, while the backrest 42 and seat 41 also rotate together on the fixed base 1. Thus, when the backrest 42 is reclined, the main module 4 can be further tilted backward, increasing the range of the body's fall. Simultaneously, the seat 41 can lift the lower body, thereby lowering the heart height and increasing the knee height, ensuring that the knees and heart are at the same level, achieving a zero-gravity posture. In a zero-gravity posture, users will not experience numbness even after prolonged lying down, and because the heart can supply blood to the whole body without overcoming much gravity, it also reduces the pressure on the heart, improving the user's resting experience and promoting better health.

[0053] In this design, the main module 4 encloses the fixed seat 1 and the stabilization component, thereby increasing the integrity of the chair and achieving a more compact structure. The purpose of using the seat 41 and the backrest 42 as a single module is not only to achieve modularity of the chair, but also to make full use of the relatively large seat 41 by enclosing the modules that enable zero-gravity posture (fixed seat 1 and stabilization component), hiding them and maintaining the appearance of the chair itself, preserving the integrity of the original office chair. Furthermore, the sufficient internal volume of the rotating seat 5 makes the overall structure more compact, thus seamlessly incorporating zero-gravity posture functionality into an office chair with basic functions. Only in the resting state will a small portion of the fixed seat 1 be exposed in the rotating seat 5.

[0054] In addition, there is no traditional chassis in this solution. The chair seat 41 in this solution integrates the chassis function into one unit. The fixed seat 1 is not a traditional chassis, but only a support seat that connects to the lifting gas spring 2 and enables the main module 4 to rotate.

[0055] Specifically, in the resting state, the main body module 4 tilts backward at an angle of 18-20° on the fixed seat 1, and the backrest 42 rotates relative to the seat 41 at an angle of 30-40°. After the main body module 4 rotates further, the backrest 42 will only tilt upward at about 30°, causing the upper body of the human body to fall more, while the seat 41 will tilt upward at about 20° to lift the lower body of the human body, thus achieving a zero-gravity posture. Even if the backrest 42 of the seat with poor rotation ability tilts backward at more than 20°, at this time, combined with the backward tilt angle of the main body module 4, the effect of zero gravity can be roughly achieved.

[0056] To achieve a zero-gravity posture while resting, setting the footrest to 6 will be more effective; for example Figure 4 As shown, the seat 41 is also equipped with a footrest 6, which is retractably located at the front of the seat 41. When the seat is in a resting state, the footrest 6 can extend forward from the seat 41 to support the legs and feet, improving comfort during rest. The footrest 6 can also be folded into the seat 41 when the user is sitting normally. Furthermore, in the resting state, the footrest 6 tilts downward from back to front, forming an 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 the junction of the seat 41 and the footrest 6 forms an upwardly protruding knee support. The angle between the seat 41 and the footrest 6 makes it more comfortable for the user's legs to bend during rest, and the upwardly protruding knee support can support the bent knee and maintain the knee height, allowing the posture to be in a zero-gravity state.

[0057] Unlike traditional chairs, the backrest 42 is connected to the seat 41, specifically, as Figure 2 ,3 As shown in Figures 6-10, the rotating seat 5 includes an upwardly protruding mounting base 53, on which the backrest 42 is rotatably mounted. Since this chair has no chassis, the rotation method of the backrest 42 differs from that of a traditional office chair. The backrest 42 is directly rotatably mounted on the rotating seat 5, achieving the same reclining effect. The seat 41 also includes a seat portion 7, which slides back and forth on the rotating seat 5. The seat portion 7 extends upward and is rotatably connected and linked to the lower end of the backrest 42. When the backrest 42 rotates backward, it drives the seat portion 7 to slide forward. The seat portion 7 supports the buttocks. The rotatable connection point between the seat portion 7 and the backrest 42 is located below the rotatable connection point between the backrest 42 and the mounting base 53, allowing the seat portion 7 to be pushed forward when the backrest 42 is reclined, thus making the reclining position more comfortable.

[0058] Furthermore, the rotating seat 5 covers the fixed seat 1, and there is a gap between the fixed seat 1 and the rotating seat 5. Specifically, the gap in the front-to-back direction is only 2mm, and the gap in the left-to-right direction is only 3mm. Therefore, the overall integrity is better and it prevents fingers from being pinched. The bottom of the rotating seat 5 is provided with a surrounding plate 54 protruding upward around the relief groove 52. The fixed seat 1 is located between the surrounding plates 54. The first rotating shaft 3 is located between the surrounding plates 54 and the fixed seat 1. The first rotating shaft 3 is arranged in the left-to-right direction, and there are two first rotating shafts 3. The two first rotating shafts 3 are located on the left and right end faces of the fixed seat 1 respectively and are rotatably connected to the left and right plates of the surrounding plate 54.

[0059] The position of the first rotating shaft 3 also affects the stability of switching to the resting state, such as Figure 9-12 As shown, in this embodiment, the first rotating shaft 3 is located at the lower front part of the fixed base 1; and in the front-back direction, the first rotating shaft 3 is closer to the middle of the fixed base 1 than the front end of the fixed base 1; in the height direction, the first rotating shaft 3 is located below the top of the lifting gas spring 2, and in the front-back direction, the position of the first rotating shaft 3 coincides with that of the lifting gas spring 2. First, if the position of the first rotating shaft 3 is too far back, there is a risk of tipping over when the main module 4 rotates backward. Second, if the position of the first rotating shaft 3 is too far forward, it is difficult for the user to drive the main module 4 to rotate backward using only the force of falling backward. Moreover, the rotating seat 5 located in front of the fixed base 1 will approach the fixed base 1 when rotating, and the fixed base 1 is located inside the rotating seat 5, so interference is likely to occur. Therefore, this solution solves the above problems. The position of the first rotating shaft 3 in the height direction lowers the height of the rotation point of the main module 4, thereby lowering the overall center of gravity and reducing the risk of tipping over when the main module 4 rotates backward. The lifting air spring 2 is used to support the fixed base 1 and the main module 4. By adjusting the position of the first rotating shaft 3 in the front-rear direction, it aims to align the rotation point of the main module 4 with the support point in the same front-rear position, thereby solving the problems of tipping over and difficulty in driving the main module 4 to rotate while lying down. Simultaneously, as... Figure 7 , 9As shown, the length of the fixed seat 1 protruding forward from the lifting rod 2 is less than the length of its protruding backward from the lifting rod 2.

[0060] Furthermore, the stabilization component is rotatably mounted on the fixed base 1 via the first rotating shaft 8, and rotatably mounted on the rotating base 5 via the second rotating shaft 9. When the main body module 4 rotates backward on the fixed base 1, the positions of the first rotating shaft 3 and the first rotating shaft 8 are relatively fixed, while the position of the second rotating shaft 9 relative to the first rotating shaft 3 and the first rotating shaft 8 changes. The first rotating shaft 3, the first rotating shaft 8, and the second rotating shaft 9 together form a state transition triangle. When switching to the resting state, the shape of the state transition triangle changes. The second rotating shaft 9 can be located in front of the first rotating shaft 8 or behind the first rotating shaft 8. When the second rotating shaft 9 is located in front of the first rotating shaft 8, the state transition triangle becomes smaller when the main body module 4 rotates backward. When the second rotating shaft 9 is located behind the first rotating shaft 8, the state transition triangle becomes larger when the main body module 4 rotates backward. The stabilization component acts on this state transition triangle to maintain stability when the shape of the state transition triangle changes.

[0061] In addition, other configuration schemes for the stabilization component are also feasible. For example, one end of the stabilization component can be rotatably mounted on the rotating seat 5 via the second rotating shaft 9, and the other end of the stabilization component can be rotatably mounted on the first rotating shaft 3. That is, the stabilization component can also be directly mounted on the first rotating shaft 3. In this case, although there is no state transition triangle as mentioned above, it can still act on the rotating seat 5 and the fixed seat 1 to maintain the stability of the rotation of the main module 4. In this embodiment, the first configuration scheme for the stabilization component is selected.

[0062] The installation of the first rotating shaft 8 and the second rotating shaft 9 is as follows:

[0063] like Figure 6 , 8As shown in Figure -12, the fixed base 1 is provided with a first protrusion 11, and the rotating base 5 is provided with a second protrusion 12. Both the first protrusion 11 and the second protrusion 12 protrude into the accommodating space 51. The first protrusion 11 is provided with a first rotating shaft 8, and the second protrusion 12 is provided with a second rotating shaft 9. The two ends of the stable state component are rotatably connected to the first protrusion 11 and the second protrusion 12 through the first rotating shaft 8 and the second rotating shaft 9, respectively. The first protrusion 11 and the second protrusion 12 are arranged at intervals and are parallel to each other. The second protrusion 12 can be in front of the first protrusion 11 or behind the first protrusion 11, corresponding to the position of the second and second rotating shafts 9. Different relative positions will cause different changes in the shape of the state transition triangle, but the effect is the same. In this embodiment, the second protrusion 12 is located in front of the first protrusion 11, that is, the second rotating shaft 9 is located in front of the first rotating shaft 8. When switching to the resting state, the second rotating shaft 9 moves upward and backward and approaches the first rotating shaft 8, thereby changing the shape of the state transition triangle and reducing the area of ​​the state transition triangle. From front to back, the thickness of the fixing seat 1 increases, and the upper part of the fixing seat 1 has an upwardly inclined slope to avoid the second protrusion 12 located in front of the fixing seat 1.

[0064] The steady-state components are as follows:

[0065] like Figure 6 , 8 As shown in Figure -14, the stable state component includes an elastic element 13 and a telescopic locking element 14 arranged in the front-to-back direction. The two ends of the elastic element 13 are respectively disposed on the rotating seat 5 and the fixed seat 1 and act on the rotating seat 5 and the fixed seat 1. The two ends of the telescopic locking element 14 are respectively disposed on the rotating seat 5 and the fixed seat 1 and extend and retract when the main body module 4 rotates relative to the fixed seat 1. The telescopic locking element 14 is configured to selectively lock or unlock the relative rotation between the main body module 4 and the fixed seat 1. The elastic element 13 is configured to provide elastic force for the main body module 4 to rotate forward from the resting state. When unlocked, the telescopic locking element 14 can extend and retract with the rotation of the rotating seat 5 and the fixed seat 1. The telescopic locking element 14 locks after corresponding extension and retraction, so that the main body module 4 stays in the rotated position. The elastic element 13 can provide elastic buffer when the main body module 4 rotates backward and can also provide resistance to avoid discomfort caused by rotating backward too quickly.

[0066] Specifically, the elastic element 13 is a spring, and the telescopic locking element 14 is a gas spring strut with a buffering effect. The gas spring strut has buffering, locking, and telescopic effects. The telescopic locking element 14 can also provide buffering, slowing down the speed of the main module 4 when it falls backward, thus improving the user experience. Since the gas spring strut is somewhat similar to a hydraulic effect, its telescopic speed is very slow. Although it can improve the user experience when falling backward, it will also be more difficult to return to the starting position. Therefore, the return force provided by the elastic element 13 is more necessary. The elastic element 13 and the telescopic locking element 14 are parallel to each other and are arranged in the front-back direction to accommodate rotation. There are at least two elastic elements 13, which are symmetrically arranged on both sides of the telescopic locking element 14. The symmetrical arrangement of the elastic elements 13 makes the application of elastic force more balanced, and the buffering and return can be more balanced, resulting in a better user experience.

[0067] The stable state assembly also includes a telescopic member 15, with its two ends rotatably connected to the rotating seat 5 and the fixed seat 1, respectively. An elastic member 13 is sleeved on the telescopic member 15, and the telescopic member 15 is configured to limit and guide the elastic member 13. Specifically, the telescopic member 15 includes a sleeve 151 and a telescopic rod 152. The sleeve 151 includes a transverse sleeve portion 1511 and a longitudinal sleeve portion 1512. The telescopic rod 152 is inserted into the longitudinal sleeve portion 1512, and the end of the telescopic rod 152 protruding from the sleeve 151 has an abutment portion 153 with an arc-shaped groove 154. The transverse sleeve portion 1511 is sleeved on the first rotating shaft 8, and the abutment portion 153 abuts against the second rotating shaft 9, with the second rotating shaft 9 located in the arc-shaped groove 154. The elastic member 13 abuts between the transverse sleeve portion 1511 and the abutment portion 153.

[0068] The first boss 11 has a first mounting gap 111 in the middle, and the second boss 12 has a second mounting gap 121 in the middle; there are two first rotating shafts 8 and two second rotating shafts 9. The two first rotating shafts 8 are inserted into the upper end of the first boss 11 and both protrude at the first mounting gap 111. Similarly, the two second rotating shafts 9 protrude at the second mounting gap 121; the two ends of the telescopic locking member 14 are respectively set in the first mounting gap 111 and the second mounting gap 121. Both ends of the telescopic locking member 14 are provided with mounting parts 141. The mounting parts 141 protrude in the left and right direction and are sleeve-shaped. The protruding ends of the first rotating shaft 8 and the second rotating shaft 9 are inserted into the mounting parts 141. The first boss 11 also has a third mounting gap 112, and the second boss 12 also has a fourth mounting gap 122. There are two of each of the third and fourth mounting gaps 112. The two ends of the telescopic member 15 are located in the third mounting gap 112 and the fourth mounting gap 122, respectively, and are connected to the first rotating shaft 8 exposed at the third mounting gap 112 and the second rotating shaft 9 exposed at the fourth mounting gap 122, respectively. The transverse sleeve portion 1511 of the telescopic member 15 is located at the third mounting gap 112, and the abutting portion 153 of the telescopic member 15 is located at the fourth mounting gap 122. The first boss 11 and the second boss 12 each include four protruding portions with shaft holes under the division of the mounting gaps.

Claims

1. An apparatus for achieving a zero-gravity attitude, characterized by: The device includes a fixed base, a rotating base, an elastic element, and a telescopic locking element. The fixed base is used to connect the support base of the seat, and the rotating base is used to connect the backrest and seat of the seat. The rotating base is rotatably mounted on the fixed base. The two ends of the elastic element are rotatably mounted on the fixed base and the rotating base respectively and act on the fixed base and the rotating base. The two ends of the telescopic locking element are rotatably mounted on the fixed base and the rotating base respectively and extend and retract with the rotation of the rotating base. The telescopic locking element is configured to selectively lock or unlock the relative rotation of the rotating base and the fixed base and to provide a buffer when the rotating base rotates. The elastic element is configured to provide a spring force for the rotating base to rotate forward.

2. The device for achieving a zero-gravity attitude according to claim 1, characterized in that: The elastic element and the telescopic locking element are arranged in the front-to-back direction and are parallel to each other.

3. The device for achieving a zero-gravity attitude according to claim 2, characterized in that: There are at least two elastic elements, which are symmetrically arranged on both sides of the telescopic locking element.

4. The device for achieving a zero-gravity attitude according to claim 1, characterized in that: The telescopic locking component is a gas spring strut.

5. The device for achieving a zero-gravity attitude according to claim 1, characterized in that: The elastic element is a spring.

6. The device for achieving a zero-gravity attitude according to claim 1, characterized in that: It also includes a telescopic component, the two ends of which are rotatably connected to a fixed base and a rotating base, respectively. An elastic element is sleeved on the telescopic component, and the telescopic component is configured to limit and guide the elastic element.

7. The device for achieving a zero-gravity attitude according to claim 6, characterized in that: The telescopic component includes a sleeve and a telescopic rod. The sleeve includes a transverse sleeve portion and a longitudinal sleeve portion. The telescopic rod is inserted into the longitudinal sleeve portion. The end of the telescopic rod protruding from the sleeve is provided with an abutment portion, which has an arc-shaped groove. A first rotating shaft is provided on the fixed base, and a second rotating shaft is provided on the rotating base. The transverse sleeve portion is sleeved on the first rotating shaft, and the abutment portion abuts against the second rotating shaft, which is located in the arc-shaped groove. An elastic element abuts between the transverse sleeve portion and the abutment portion.

8. The device for achieving a zero-gravity attitude according to claim 1, characterized in that: The fixed base is provided with a first protrusion, and the rotating base is provided with a second protrusion. The first protrusion is provided with a first rotating shaft, and the second protrusion is provided with a second rotating shaft. The two ends of the elastic element and the telescopic locking element are respectively rotatably connected to the first protrusion and the second protrusion through the first rotating shaft and the second rotating shaft.

9. The device for achieving a zero-gravity attitude according to claim 8, characterized in that: The first and second protrusions are arranged at intervals and are parallel to each other.

10. The device for achieving zero-gravity attitude according to claim 8, characterized in that: The first boss has a first mounting gap in the middle, and the second boss has a second mounting gap in the middle; there are two first rotating shafts and two second rotating shafts. The two first rotating shafts are inserted into the first boss and their ends are exposed at the first mounting gap. Similarly, the two second rotating shafts are exposed at the second mounting gap. The two ends of the telescopic locking member are respectively set in the first mounting gap and the second mounting gap. Both ends of the telescopic locking assembly are provided with mounting parts. The mounting parts protrude in the left and right direction and are sleeve-shaped. The exposed ends of the first rotating shaft and the second rotating shaft are inserted into the mounting parts.

11. The device for achieving a zero-gravity attitude according to claim 10, characterized in that: The first boss is provided with a third mounting gap, and the second boss is provided with a fourth mounting gap. The two ends of the elastic member are located in the third mounting gap and the fourth mounting gap, respectively, and are connected to the first rotating shaft exposed at the third mounting gap and the second rotating shaft exposed at the fourth mounting gap, respectively.

12. The device for achieving a zero-gravity attitude according to claim 1, characterized in that: The bottom shell covers the base, and there is a gap between the base and the bottom shell.

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