Supporting transmission device, seat frame and seat

Abstract

The utility model discloses a supporting transmission device, a seat frame and a seat. The supporting transmission device comprises a movable base, a driving mechanism and a leg supporting mechanism. The driving mechanism comprises a rotating part rotationally supported on the movable base; the leg supporting mechanism is fixedly connected to the rotating part, the leg supporting mechanism comprises a leg telescopic assembly, and the rotating part rotates to drive the leg telescopic assembly to rotate so as to drive the leg telescopic assembly to stretch or retract. A driver in the driving mechanism is arranged at the position close to the side edge of the movable base, so that a serpentine spring in a seat bag at the top of the movable base is prevented from being in contact with the driver during sinking, and the sitting feeling of a user is improved; the movable base provides support for the rotating component, the situation that the rotating component moves asynchronously at all positions due to offset of the driver is avoided, and therefore the rotating component is prevented from shaking. The rotating component is fixedly connected with the driving rod, the leg telescopic assembly is driven to move through the driving rod, and it is guaranteed that torsion received by the leg telescopic assembly is uniform.

Description

Technical Field

[0001] This application relates to the field of furniture technology, and in particular to a support transmission device, a seat frame, and a seating arrangement. Background Technology

[0002] In a zero-gravity environment, the human body often exhibits a specific posture when relaxed and without external force. This posture minimizes the body's need to resist gravity, thereby reducing stress. In the design of seating, utilizing users in a zero-gravity posture has become a new research direction.

[0003] To enable the human body to switch between a zero-gravity posture and a normal sitting posture, some seats are equipped with a motion mechanism to support the legs. However, the motion mechanism often vibrates during the movement due to asynchronous movement, which reduces the user experience.

[0004] In the prior art, in order to avoid vibration of the motion mechanism, the setting position of the corresponding drive mechanism is limited, which makes the drive mechanism easily affect the user's sitting comfort. Utility Model Content

[0005] This application aims to at least solve one of the technical problems existing in the prior art. To this end, this application proposes a support transmission device that can drive the leg support mechanism to move through a stable supporting rotating component, thereby preventing the leg support mechanism from shaking.

[0006] According to a first aspect embodiment of the present application, the support transmission device includes a movable base, a drive mechanism, and a leg support mechanism; the drive mechanism includes a rotating component supported on the movable base, the rotating component being rotatably disposed on the movable base; the leg support mechanism is fixedly connected to the rotating component, the leg support mechanism including a leg telescopic assembly, the rotating component driving the leg telescopic assembly to rotate by rotation, thereby causing the leg telescopic assembly to extend or retract.

[0007] The support transmission device according to the embodiments of this application has at least the following beneficial effects: the driver in the drive mechanism is located near the side edge of the movable base, which prevents the serpentine spring in the seat cushion at the top of the movable base from contacting the driver when it is concave, thus improving the user's seating comfort; the driver is used to drive the rotating component to rotate, and the movable base provides support for the rotating component, avoiding asynchronous movement of the rotating component at different positions due to driver bias, thereby preventing the rotating component from shaking; the rotating component is fixedly connected to the drive rod, and drives the leg extension component to move through the drive rod, ensuring that the torque received by the leg extension component is uniform, so that the user's legs can be raised and lowered stably, thus improving the user's experience.

[0008] According to some embodiments of this application, the driving mechanism includes a driver, one end of which is hinged to the movable base, and the other end of which is hinged to the rotating component. The driver is positioned close to the side edge of the movable base.

[0009] According to some embodiments of this application, the drive mechanism further includes a driver mounting component, which is fixedly disposed on the rotating component and extends outward from the rotating component, and is hinged to the driver.

[0010] According to some embodiments of this application, the movable base includes side frames disposed on opposite sides and a horizontal frame connected between each of the side frames, the two ends of the rotating component are rotatably connected to each of the side frames, and the end of the driver is hinged to the horizontal frame.

[0011] According to some embodiments of this application, the end of the rotating component is provided with a first insertion hole, and the side frame is provided with a first support extending toward the rotating component. The first support is inserted into the first insertion hole to form a rotatable connection.

[0012] According to some embodiments of this application, the end of the rotating component is provided with a second support extending outward, the side frame is provided with a second insertion hole, and the second support is inserted into the second insertion hole to form a rotatable connection.

[0013] According to some embodiments of this application, the rotating component is connected to the side frame near the end of the side frame.

[0014] According to some embodiments of this application, the leg support mechanism further includes a drive rod, which is fixedly connected to the rotating component and hinged to the leg telescopic assembly.

[0015] According to some embodiments of this application, the leg telescopic assembly includes a first telescopic unit, which is hinged to the drive rod and the movable base. The drive rod drives the first telescopic unit to extend or retract by rotation.

[0016] According to some embodiments of this application, the first telescopic unit includes a first leg link, a second leg link, a third leg link, and a leg link mounting component. The first leg link is hinged to the movable base, the third leg link is hinged between the drive rod and the leg link mounting component, and the second leg link is hinged to the leg link mounting component, the drive rod, and the first leg link.

[0017] According to some embodiments of this application, the first leg link and the leg link mounting component are hinged to both ends of the second leg link, and the drive rod is hinged to the middle of the second leg link; the movable base and the third leg link are hinged to both ends of the drive rod, and the second leg link is hinged to the middle of the drive rod.

[0018] According to a second aspect embodiment of this application, the seat frame includes a fixed base, a movable base, a drive mechanism, and a leg support mechanism; a guide assembly is provided between the fixed base and the movable base, and the movable base is slidably disposed on the fixed base via the guide assembly; the drive mechanism includes a rotating component and a driver, the rotating component being a rotating rod rotatably supported on the movable base, and the driver being hinged to the rotating component via a driver mounting component; the leg support mechanism includes a drive rod fixedly connected to the rotating component and a leg extension assembly hinged to the drive rod, the rotating component and the drive rod driving the leg extension assembly to extend or retract through rotation.

[0019] The seat frame according to the embodiments of this application has at least the following beneficial effects: the seat frame limits the relative movement between the movable base and the fixed base through the guide component, ensuring that the relative movement between the movable base and the fixed base can enable the user to switch to a zero-gravity posture and enhance the user's zero-gravity experience.

[0020] According to some embodiments of this application, the guide assembly includes a first guide structure and a second guide structure disposed on the fixed base, wherein the first guide structure has an inclination angle of -5° to 5° relative to the horizontal direction.

[0021] According to some embodiments of this application, the second guide structure includes a first inclined portion and a second inclined portion, wherein the first inclined portion has an inclination angle of 15° to 33° relative to the horizontal direction, and the second inclined portion has an inclination angle of 5° to 18° relative to the horizontal direction.

[0022] According to some embodiments of this application, the seat frame further includes a connecting mechanism rotatably disposed on the movable base, the connecting mechanism being hinged between the rotating component and the fixed base.

[0023] According to some embodiments of this application, the connecting mechanism includes a first link, a second link, and a third link. The second link includes a first hinge portion hinged to the first link, a second hinge portion hinged to the third link, and a rotating connection portion rotatably connected to the movable base. The rotating connection portion is located between the first hinge portion and the second hinge portion. The first link is hinged to the drive rod, and the third link is hinged to the fixed base.

[0024] According to some embodiments of this application, the ratio of the distance between the rotating connection portion and the first hinge portion to the distance between the rotating connection portion and the second hinge portion is 1:1 to 1:3.

[0025] According to some embodiments of this application, the seat frame further includes a back support mechanism, which includes a first back link, a second back link, a third back link, and a back link mounting component. The first back link and the second back link are both hinged between the back link mounting component and the fixed base. The third back link is hinged between the first back link and the movable base. The side edge of the first back link has an outwardly extending extension, and the end of the third back link is hinged to the extension.

[0026] According to some embodiments of this application, the backrest mounting component is fixedly connected to a backrest mounting plate. When the first sliding component slides to the end of the first guide structure and the second sliding component slides to the end of the second inclined portion, the movable base is at an angle of 121° to 135° with the backrest mounting plate.

[0027] According to a third aspect embodiment of this application, the seating includes the aforementioned seat frame.

[0028] The seating according to the embodiments of this application has at least the following beneficial effects: In the seat frame of the second aspect embodiment of this application, the driver in the drive mechanism is located near the side edge of the movable base, preventing the serpentine spring inside the seat cushion at the top of the movable base from contacting the driver when it is concave, thus improving the user's seating comfort; the driver is used to drive the rotating component to rotate, and the movable base provides support for the rotating component, avoiding asynchronous movement of different positions of the rotating component due to driver bias, thereby preventing the rotating component from shaking; the rotating component is fixedly connected to the drive rod, and the drive rod drives the leg extension assembly to move, ensuring that the torque received by the leg extension assembly is uniform, allowing the user's legs to rise and fall stably, improving the user's experience; the seat frame limits the relative movement between the movable base and the fixed base through the guide assembly, ensuring that the relative movement between the movable base and the fixed base can enable the user to switch to a zero-gravity posture, enhancing the user's zero-gravity sensation.

[0029] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0030] The present application will be further illustrated below with reference to the accompanying drawings and embodiments. It should be noted that the embodiments illustrated in the following drawings are exemplary and are only used to explain the present application, and should not be construed as limiting the present application.

[0031] Figure 1 This is a schematic diagram of the seat frame in a conventional sitting posture according to an embodiment of this application;

[0032] Figure 2 This is a schematic diagram of the seat frame in an embodiment of this application with the support cover removed in a normal sitting posture;

[0033] Figure 3 This is a schematic diagram of the seat frame in an embodiment of this application with the support cover removed in a zero-gravity state;

[0034] Figure 4 This is a cross-sectional view showing the connection method between the movable base and the rotating component in the seat frame of this application embodiment;

[0035] Figure 5 This is a cross-sectional view showing the connection between the movable base and the rotating component in the seat frame of this application embodiment;

[0036] Figure 6 This is a schematic diagram of the leg support mechanism in the seat frame of this application embodiment;

[0037] Figure 7 This is a schematic diagram of the leg support mechanism in the seat frame of this application embodiment;

[0038] Figure 8 This is a front view of the seat frame according to an embodiment of this application in a normal sitting posture;

[0039] Figure 9 This is a front view of the seat frame in a zero-gravity posture according to an embodiment of this application;

[0040] Figure 10 This is a front view of the fixed base in the seat frame of this application embodiment;

[0041] Figure 11 This is a side view of the seat frame according to an embodiment of this application in a normal sitting posture;

[0042] Figure 12 In the seat frame of this application embodiment Figure 6 AA view;

[0043] Figure 13 This is a side view of the seat frame in a zero-gravity posture according to an embodiment of this application;

[0044] Figure 14 In the seat frame of this application embodiment Figure 8 BB view;

[0045] Figure 15 This is a front view of the connecting mechanism of the seat frame according to an embodiment of this application;

[0046] Figure 16 This is a schematic diagram of the back support mechanism in the seat frame of this application embodiment;

[0047] Figure 17 This is a schematic diagram of the back support mechanism in the seat frame of this application embodiment.

[0048] Figure label:

[0049] Movable base 100; side frame 101; first support column 1011; second insertion hole 1012; horizontal frame 102; support cover plate 103;

[0050] Drive mechanism 200; rotating component 201; first socket 2011; second support column 2012; driver 202; driver mounting component 203;

[0051] Leg support mechanism 300; leg telescopic assembly 301; drive rod 302; first leg link 303; second leg link 304; third leg link 305; leg link mounting component 306; fourth leg link 307; fifth leg link 308.

[0052] Fixed base 400; first groove 401; second groove 402; first inclined part 4021; transition part 4022; second inclined part 4023; first sliding member 403; second sliding member 404;

[0053] Connecting mechanism 500; first link 501; second link 502; first hinge 5021; second hinge 5022; rotating connection 5023; third link 503;

[0054] Back support mechanism 600; first back link 601; extension 6011; second back link 602; third back link 603; back link mounting component 604; backrest mounting plate 605. Detailed Implementation

[0055] The embodiments of this application are described in detail below with reference to the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0056] In the description of this application, it should be understood that the terms "center", "middle", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0057] In the description of this application, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0058] In the description of this application, unless otherwise expressly specified and limited, the terms "set up," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0059] In the description of this application, the use of terms such as "one embodiment," "some embodiments," "an example," "some instances," "some embodiments," "illustrative embodiment," "example," "specific example," and "some examples" indicates that the specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0060] Currently, all seating systems capable of switching between a conventional sitting posture and a zero-gravity posture are equipped with a leg support mechanism. In a conventional sitting posture, the user's legs can hang freely; in a zero-gravity posture, the user's legs gradually rise as the leg support mechanism ascends. These seats typically include a driver and a drive structure. The driver, located at the bottom of the seat, drives the drive structure, which in turn moves the leg support mechanism.

[0061] Furthermore, the actuator is often connected to the middle of the drive structure, which in turn corresponds to the middle of the seat. However, the seat usually includes several serpentine springs. It is understandable that the end positions of each serpentine spring connected to the edge of the seat have weaker deformation capacity, while the middle positions of each serpentine spring have stronger deformation capacity. The actuator corresponds to the position where the serpentine spring has stronger deformation capacity.

[0062] When a user sits on the top of the seat, the middle of the serpentine spring is more likely to sink, causing the middle of the serpentine spring to contact the actuator, thus affecting the user's seating comfort.

[0063] To prevent the serpentine spring in the seat from contacting the actuator, the actuator can be offset, i.e., deviated from the center of the drive structure. However, currently, the drive structure in seating is only connected to the leg support mechanism, leaving the drive structure unsupported; or, the drive structure relies solely on a relatively thin transmission component to connect to the leg support mechanism, resulting in unstable force transmission. When the actuator is offset, both of these situations can easily lead to asynchronous movement and uneven torque on different parts of the drive structure, causing the drive structure to vibrate.

[0064] Furthermore, when the seating position switches from a regular sitting posture to a zero-gravity posture, the drive structure drives multiple leg support mechanisms to move, raising the user's legs to a certain height. At this time, if the movement of different parts of the drive structure is not synchronized or the torque is uneven, it can easily cause uneven torque on each leg support mechanism, which can further lead to problems such as leg support mechanism vibration, affecting the user experience.

[0065] like Figure 1 As shown in the illustration, this application provides a support transmission device, which includes a movable base 100, a drive mechanism 200, and a leg support mechanism 300. During the switching between a conventional sitting posture and a zero-gravity posture, the drive mechanism 200 is consistently and stably supported, preventing asynchronous movement at different positions within the drive mechanism 200. The drive mechanism 200 includes a rotating component 201 and a driver 202. With the drive mechanism 200 stably supported, the driver 202, positioned at any point on the rotating component 201, ensures balanced torque across the rotating component 201.

[0066] Meanwhile, the rotating component 201 in the drive mechanism 200 is fixedly connected to corresponding components within several leg support mechanisms 300, thereby directly driving each leg support mechanism 300 to move without the need for indirect driving of the leg support mechanism 300 through additional transmission components. Therefore, when the drive mechanism 200 is stably supported, the support transmission device of this application can prevent asynchronous movement of the leg support mechanisms 300, ensure balanced torque of each leg support mechanism 300, and thus avoid abnormal phenomena such as shaking of the leg support mechanisms 300.

[0067] like Figure 2 and Figure 3 As shown, in some examples, the movable base 100 adopts a hollow frame structure and is used to install the seat bag. The movable base 100 includes side frames 101 and cross frames 102. Both side frames 101 and cross frames 102 adopt a rod-like structure. Two side frames 101 are provided, which are located on opposite sides of the movable base 100. The cross frames 102 are connected between the two side frames 101, and the cross frames 102 are located away from the leg support mechanism 300 in the movable base 100.

[0068] Furthermore, the drive mechanism 200 includes a rotating component 201, which has a rod-like structure. The rotating component 201 is supported on and rotatably connected to the movable base 100, meaning that the support of the movable base 100 for the rotating component 201 does not affect the free rotation of the rotating component 201. The materials chosen for the movable base 100 and the rotating component 201 need to have sufficient strength to prevent abnormal movement such as bending or twisting of the rotating component 201 during operation, further ensuring balanced torque at all points of the rotating component 201 during rotation.

[0069] Specifically, the rotating component 201 is formed as a rotating rod and is located between the two side frames 101. Both ends of the rotating component 201 are rotatably connected to the two side frames 101 respectively. It is worth noting that the rotatable connection between the rotating component 201 and the side frames 101 does not affect the supporting function of the side frames 101 for the rotating component 201. The extending directions of the two side frames 101 are parallel to each other, while the extending directions of the horizontal frame 102 and the rotating component 201 are perpendicular to the side frames 101. Therefore, the horizontal frame 102, the two side frames 101, and the rotating component 201 form a closed rectangular structure.

[0070] Meanwhile, the leg support mechanism 300 includes a leg telescopic component 301. It is understood that, to ensure balanced support for the user's legs, two leg support mechanisms 300 are provided. Furthermore, the two leg support mechanisms 300 are located on opposite sides of the movable base 100.

[0071] In addition, both leg support mechanisms 300 are fixedly connected to the rotating component 201 and form a unified whole that moves together with the rotating component 201. At the same time, the leg extension assembly 301 is formed as a linkage mechanism. The rotating component 201 drives the leg extension assembly 301 to rotate by rotating, thereby causing the leg extension assembly 301 to extend or retract.

[0072] During movement, the leg extension assembly 301 can retract to the bottom of the movable base 100 and extend to the outside of the movable base 100. It is understood that when the leg extension assembly 301 retracts to the bottom of the movable base 100, the support transmission device of this application is adapted to the user's normal sitting posture; when the leg extension assembly 301 extends to the outside of the movable base 100, the support transmission device of this application is adapted to the user's weightless posture.

[0073] Specifically, a support cover plate 103 is provided on the outer side of the rotating component 201. The support cover plate 103 is connected to each side frame 101 and extends to the top of the rotating component 201. On the one hand, the support cover plate 103 can protect the rotating component 201; on the other hand, the support cover plate 103 can prevent the rotating component 201 from contacting the seat at the top of the movable base 100, prevent the seat from interfering with the rotation of the rotating component 201, and also prevent the rotating component 201 from wearing down the seat, thus improving the user experience.

[0074] In some examples, the drive mechanism 200 includes a driver 202 capable of outputting linear motion. Specifically, the driver 202 can take the form of an electric actuator, a pneumatic cylinder, a hydraulic cylinder, or other similar structures.

[0075] The driver 202 has a certain length, with its fixed end hinged to the cross frame 102 and its output end hinged to the side wall of the rotating component 201. Alternatively, the output end of the driver 202 is hinged to the cross frame 102, and the fixed end of the driver 202 is hinged to the side wall of the rotating component 201.

[0076] Furthermore, the drive mechanism 200 also includes a driver mounting component 203, which is fixedly disposed on the side wall of the rotating component 201 and extends a certain distance outward from the rotating component 201. The first end of the driver 202 is hinged to the cross frame 102, and the second end of the driver 202 is hinged to the rotating component 201 through the driver mounting component 203.

[0077] Specifically, the driver mounting component 203 adopts a rod-shaped structure and is provided with a hinge hole and a hinge shaft for hinged to the driver 202. The driver mounting component 203 is hinged to the driver 202 through the hinge hole and the hinge shaft.

[0078] It is understood that the driver mounting component 203 is used to receive the driving force transmitted by the driver 202 and to act as the lever arm for the rotation of the rotating component 201, thereby converting the thrust output by the driver 202 into the torque for the rotation of the rotating component 201.

[0079] As the length of the actuator 202 increases, the actuator 202 pushes the actuator mounting component 203 to rotate toward the leg support mechanism 300, thereby causing the rotating component 201 to rotate. The rotating component 201 drives the leg telescopic component 301 to gradually extend to the outside of the movable base 100, so that the user gradually enters a weightless posture.

[0080] When the length of the driver 202 decreases, the driver 202 pulls the driver mounting component 203 to rotate away from the leg support mechanism 300, thereby driving the rotating component 201 to rotate. The rotating component 201 drives the leg extension component 301 to gradually retract to the bottom of the movable base 100, so that the user gradually returns to a normal sitting posture.

[0081] In some examples, in existing seating systems, the drive structure is directly mounted on the leg extension assembly 301, which is hinged to the side frame 102, resulting in a lack of support for the drive structure. Meanwhile, the driver in the seating system is connected to the symmetrical center of the drive structure, ensuring balanced torque transmission at both ends of the drive structure.

[0082] However, the actuator 202, located at the center of the symmetry of the drive structure, is also in the middle of the base, where the seat cushion that supports the user's buttocks is placed. Under the user's weight, the serpentine spring in the seat cushion inevitably experiences significant concavity, with the most pronounced concavity in the middle of the serpentine spring. This can easily lead to the serpentine spring contacting the actuator 202, affecting the user's seating comfort.

[0083] Since the rotating component 201 of this application is always stably supported on the movable base 100, the driver 202 can be connected to any position on the side wall of the rotating component 201 to ensure that the torque at both ends of the rotating component 201 is balanced, thereby avoiding the shaking of the rotating component 201 and improving the user experience.

[0084] Optionally, since the location of the driver 202 in this application can be arbitrarily selected, it can be set near the side frame 101 to prevent the serpentine spring in the seat from contacting the driver 202, thereby further improving the user experience.

[0085] like Figure 4As shown, in some examples, the end of the rotating component 201 is provided with a first insertion hole 2011, the extension direction of the first insertion hole 2011 being the axial direction of the rotating component 201. Simultaneously, the side frame 101 has a first support post on the side facing the rotating component 201, the extension direction of the first support post 1011 also being the axial direction of the rotating component 201. It can be understood that the shape of the first insertion hole 2011 matches the shape of the first support post 1011, facilitating the insertion of the first support post 1011. When the first support post 1011 is inserted into the first insertion hole 2011, the rotating component 201 and the side frame 101 form a rotatable connection, and the first support post 1011 provides support for the rotating component 201.

[0086] It is understood that both ends of the rotating component 201 are provided with first insertion holes 2011, and both side frames 101 are provided with first support columns 1011, so that both ends of the rotating component 201 are rotatably supported on the movable base 100 by insertion.

[0087] Specifically, the rotating component 201 includes a connecting rod, a first support column 1011, and a driver mounting component 203. A first insertion hole 2011 is located on the connecting rod, and the first support column 1011 is threadedly connected to the first insertion hole 2011. When the first support column 1011 is threadedly connected to the first insertion hole 2011, the first support column 1011 can rotate relative to the fixed base 400. Figure 4 As shown. This structure ensures that the rotating component 201 is detachable and replaceable. This structure makes the first support column 1011 a vulnerable rotating component and the fixed base 400 a direct load-bearing component for rotation. The fixed base 400, as a direct load-bearing component for rotation, can increase the deformation resistance of the load-bearing part.

[0088] like Figure 5 As shown, in some examples, the end of the rotating component 201 is provided with a second support post 2012, the extension direction of the second support post 2012 being the axial direction of the rotating component 201, and the side frame 101 is provided with a second insertion hole 1012, the extension direction of the second insertion hole 1012 also being the axial direction of the rotating component 201. The shape of the second insertion hole 1012 matches the shape of the second support post 2012, facilitating the insertion of the second support post 2012. When the second support post 2012 is inserted into the second insertion hole 1012, the rotating component 201 and the side frame 101 form a rotatable connection, and the second support post 2012, in conjunction with the second insertion hole 1012, can provide support for the rotating component 201.

[0089] It is understood that the rotating component 201 has a second support column 2012 at both ends, and the two side frames 101 have a second insertion hole 1012, so that the two ends of the rotating component 201 are rotatably supported on the movable base 100 by insertion.

[0090] Specifically, the rotating component 201 includes a connecting rod, a second support column 2012, and a driver mounting component 203. The second support column 2012 is threadedly connected to the second socket 1012. When the second support column 2012 is threadedly connected to the second socket 1012, the second support column 2012 can rotate relative to the connecting rod. This structure ensures that the rotating component 201 is detachable and replaceable. This structure makes the second support column 2012 a vulnerable rotating component and the connecting rod a direct load-bearing component, which reduces the replacement cost of the rotating component 201.

[0091] The two cylindrical structures are designed to correspond to each other, ensuring that the second support column 2012 can rotate freely within the second socket 1012.

[0092] In some examples, depending on the stroke of the driver 202, the rotating component 201 is rotatably connected to the side frame 101 near the end of the side frame 101, that is, the rotating component 201 is located at the edge of the movable base 100, thereby meeting the installation space requirements of the driver 202.

[0093] like Figure 6 and Figure 7 As shown, in some examples, the leg support mechanism 300 also includes a drive rod 302 for driving the leg telescopic assembly 301 in the leg support mechanism 300 to telescopically move.

[0094] The drive rod 302 is fixedly connected to the rotating component 201. Since two leg support mechanisms 300 are required, corresponding to the user's left and right legs respectively, two drive rods 302 are also provided accordingly. Specifically, the two drive rods 302 are located at opposite ends of the rotating component 201.

[0095] When the driver 202 drives the rotating component 201 to rotate, the drive rod 302 is fixedly connected to the rotating component 201, and the drive rod 302 also rotates at the same amplitude, thereby driving the leg telescopic components 301 in the two leg support mechanisms 300 to perform telescopic movements.

[0096] In some examples, the leg extension assembly 301 includes a first extension unit. The first extension unit is hinged to both the drive rod 302 and the movable base 100. Rotation of the drive rod 302 drives the first extension unit to perform a first-stage extension / retraction of the leg extension assembly 301.

[0097] In some examples, the first telescopic unit includes a first leg link 303, a second leg link 304, a third leg link 305, and a leg link mounting component 306.

[0098] The first end of the first leg link 303 is hinged to the movable base 100, and the second end of the first leg link 303 is hinged to the second leg link 304. Specifically, the first end of the first leg link 303 is hinged to the side frame 101. On the side frame 101, there is a certain distance between the hinge position of the first end of the first leg link 303 and the position of the rotating component 201.

[0099] Furthermore, the first end of the second leg link 304 is hinged to the second end of the first leg link 303, and the second end of the second leg link 304 is hinged to the leg link mounting component 306. Simultaneously, the second leg link 304 is also hinged to the drive rod 302, forming a closed four-bar linkage with the side frame 101, the first leg link 303, the second leg link 304, and the drive rod 302. This helps ensure the stability of the telescopic movement of the first telescopic unit.

[0100] In addition, the first end of the third leg link 305 is hinged to the end of the drive rod 302, and the third leg link 305 is also hinged to the leg link mounting component 306. That is, both the second leg link 304 and the third leg link 305 are hinged to the leg link mounting component 306, so that the drive rod 302, the second leg link 304, the third leg link 305 and the leg link mounting component 306 form a closed four-bar linkage, which further ensures the stability of the telescopic movement of the first telescopic unit.

[0101] It is worth noting that the first leg link 303 and the leg link mounting component 306 are hinged to both ends of the second leg link 304, and the drive rod 302 is hinged to the middle of the second leg link 304. Simultaneously, the side frame 101 and the third leg link 305 are hinged to both ends of the drive rod 302, and the second leg link 304 is hinged to the middle of the drive rod 302. That is, the drive rod 302 and the second leg link 304 are hinged in the middle, ensuring that the four-bar linkage formed by the side frame 101, the first leg link 303, the second leg link 304, and the drive rod 302, as well as the four-bar linkage formed by the moving rod 302, the second leg link 304, the third leg link 305, and the leg link mounting component 306, can operate in conjunction.

[0102] When the drive rod 302 rotates towards the leg support mechanism 300, under the mutual restraint of the first leg link 303, the second leg link 304, the third leg link 305, and the leg link mounting component 306, the third leg link 305 provides an upward driving force to the leg link mounting component 306, and the second leg link 304 provides a downward driving force to the leg link mounting component 306. The combined effect of the upward and downward forces drives the leg link mounting component 306 to rotate. At the same time, the angle between the drive rod 302 and the third leg link 305 increases, and the angle between the first leg link 303 and the second leg link 304 also increases, realizing the first stage of extension and retraction of the leg telescopic assembly 301.

[0103] In some examples, the leg telescopic assembly also includes a second telescopic unit, which is hinged to both the leg link mounting component 306 and the third leg link 305. The drive rod 302 drives the first telescopic unit to extend and retract, and the first telescopic unit further drives the second telescopic unit to extend and retract, thereby realizing the second stage of extension and retraction of the leg telescopic assembly 301.

[0104] In some examples, the second telescopic unit includes a fourth leg link 307 and a fifth leg link 308. The first end of the fourth leg link 307 is hinged to the leg link mounting component 306, forming a structural connection between the second telescopic unit and the first telescopic unit, and the second end of the fourth leg link 307 is hinged to the fifth leg link 308.

[0105] Meanwhile, the first end of the fifth leg link 308 is hinged to the third leg link 305, further forming a structural connection between the second telescopic unit and the first telescopic unit. In addition, the fifth leg link 308 is also hinged to the fourth leg link 307.

[0106] Therefore, the leg link mounting component 306, the fourth leg link 307, the fifth leg link 308, and the third leg link 305 also form a four-bar linkage, which facilitates the linkage between the first telescopic unit and the second telescopic unit.

[0107] Specifically, the drive rod 302 and the fifth leg link 308 are hinged to both ends of the third leg link 305, and the leg link mounting component 306 is hinged to the middle of the third leg link 305, so that the third leg link 305 can apply driving force to the fifth leg link 308 during rotation.

[0108] In some examples, the leg link mounting component 306 is approximately triangular in structure. The hinge positions of the second leg link 304, the third leg link 305, and the fourth leg link 307 on the leg link mounting component 306 are respectively close to the three angular positions of the leg link mounting component 306. This ensures that the hinge positions of the second leg link 304, the third leg link 305, and the fourth leg link 307 on the leg link mounting component 306 are separated from each other. This facilitates the formation of a four-bar linkage by the second leg link 304, the third leg link 305, the drive rod 302, and the leg link mounting component 306. It also facilitates the formation of a four-bar linkage by the third leg link 305, the fourth leg link 307, the fifth leg link 308, and the leg link mounting component 306.

[0109] In addition, the fifth leg link 308 extends away from the support transmission device to support the user's lower leg.

[0110] During the extension of the leg telescopic assembly 301, the drive rod 302 rotates towards the leg telescopic assembly 301, thereby driving the first leg link 303, the second leg link 304, and the third leg link 305 to rotate. The angle between the drive rod 302 and the third leg link 305 increases, as does the angle between the first leg link 303 and the second leg link 304. This ensures that the second leg link 304 applies a downward driving force to the leg link mounting component 306, and also ensures that the third leg link 305 applies an upward driving force to the leg link mounting component 306. Under the action of the downward and upward forces, the leg link mounting component 306 rotates, completing the first stage of extension of the first telescopic unit. At the same time, the third leg link 305 applies a downward driving force to the fifth leg link 308, and the fourth leg link applies an upward driving force to the fifth leg link 308. Under the combined action of the downward force and the upward force, the angle between the fifth leg link 308 and the third leg link 305 gradually increases, thereby completing the extension process of the second telescopic unit.

[0111] It is understandable that the contraction and extension processes of the first and second telescopic units are inverses of each other, which will not be elaborated here.

[0112] like Figure 1 As shown in the figure, this application embodiment provides a seat frame, which includes a fixed base 400, a movable base 100, a drive mechanism 200 and a leg support mechanism 300.

[0113] The fixed base 400 is positioned constantly and supports the movable base 100, which in turn supports the user's torso. Specifically, the movable base is used to mount the seat, with the user's buttocks contacting the seat to ensure user comfort. The fixed base 400 and the movable base 100 are slidably connected, and a guide assembly is provided between them.

[0114] Understandably, when the movable base 100 slides, the relative position between the movable base 100 and the fixed base 400 changes. When the movable base 100 slides within the range of the fixed base 400, the user on the movable base 100 is in a normal sitting posture; when the movable base 100 slides out of the range of the fixed base 400, the user on the movable base 100 is in a weightless sitting posture.

[0115] Furthermore, the drive mechanism 200 includes a rotating component 201 and a driver 202. The rotating component 201 is rotatably supported on the movable base 100. Since the movable base 100 is made of a high-strength material, it can prevent the rotating component 201 from shaking when it rotates and also ensure that the torque at all positions of the rotating component 201 is uniform. One end of the driver 202 is hinged to the movable base 100, and the other end is hinged to the rotating component 201. Therefore, the driver 202 can drive the rotating component 201 to rotate by changing its length.

[0116] Specifically, a driver mounting component 203 is fixedly provided on the side wall of the rotating component 201. The rotating component 201 includes a connecting rod, the driver mounting component 203 is disposed on the connecting rod, and the first support 1011 or the second support 2012 is detachably disposed on the connecting rod. The driver mounting component 203 extends a certain distance outward from the rotating component 201. The driver 202 is hinged to the driver mounting component 203, thereby converting the thrust or pull applied by the driver 202 into the torque that drives the rotating component 201.

[0117] Meanwhile, the leg support mechanism 300 includes a drive rod 302 and a leg telescopic assembly 301, with the leg telescopic assembly 301 hinged to the drive rod 302. Specifically, two leg support mechanisms 300 are provided, located on opposite sides of the movable base 100, corresponding to the user's legs.

[0118] The rotating component 201 and the drive rod 302 form a single unit, namely the rotating assembly. The rotating assembly drives the leg extension assembly 301 to extend and retract through rotation. Since the rotating component 201 is stably supported by the movable base 100, the rotating assembly is also stably supported. This improved stability of the rotating assembly ensures smooth movement of the leg extension assembly 301 and uniform torque distribution between the two leg extension assemblies 301, enhancing the user experience.

[0119] At this time, the actuator 202, regardless of its position on the rotating component 201, ensures consistent movement of the rotating component 201 at different positions, thereby guaranteeing torque balance at different positions and preventing the seat frame of this application from shaking. Therefore, the actuator 202 can be positioned off-center from the movable base 100. When the serpentine spring of the top seat cushion of the movable base 100 sinks, the actuator 202, positioned off-center from the movable base 100, can avoid contact with the serpentine spring, improving the user's seating comfort.

[0120] It is worth noting that the movement of the leg extension component 301 is linked to the movement of the movable base 100. When the movable base 100 slides within the range of the fixed base 400, the leg extension component 301 retracts to the bottom of the movable base 100, and the user on the movable base 100 is in a normal sitting posture. When the movable base 100 slides out of the range of the fixed base 400, the leg extension component 301 extends to the outside of the movable base 100 to support the user's legs, and the user on the movable base 100 is in a weightless sitting posture.

[0121] In some examples, the rotating component 201 and the drive rod 302 are fixedly connected. The rotating component 201 is supported on the movable base 100 and rotatably connected to the movable base 100. The drive rod 302 is hinged to the leg telescopic assembly 301, thereby driving the leg telescopic assembly 301 to retract or extend.

[0122] Specifically, the rotating component 201 and the movable base 100 can be connected by a plug-in connection, which allows the movable base 100 to provide sufficient support for the rotating component 201 while ensuring that the rotating component 201 and the movable base 100 are rotatably connected.

[0123] In some examples, such as Figure 8 and Figure 9 As shown, the guide assembly includes a first guide structure and a second guide structure, which are disposed on the fixed base 400. The first and second guide structures can adopt structural forms such as grooves or slide rails. Meanwhile, the movable base 100 is provided with a first sliding component 403 and a second sliding component 404.

[0124] Specifically, the first sliding component 403 corresponds to the first guide structure, and the second sliding component 404 corresponds to the second guide structure. Specifically, the fixed base 400 has a first guide structure and a second guide structure arranged side-by-side on opposite sides, and the movable base 100 has a first sliding component 403 and a second sliding component 404 arranged side-by-side on opposite sides.

[0125] It is understood that if the first sliding component 403 slides along the first guide structure and the second sliding component 404 slides along the second guide structure, then the first guide structure and the second guide structure can define the direction of movement of the movable base 100 relative to the fixed base 400.

[0126] Furthermore, as the second guide structure gradually increases in height away from the first guide structure, when the movable base 100 moves out of the range of the fixed base 400 under the constraint of the guide component, the height of the movable base 100 increases. As the height of the movable base 100 slowly rises, the user on the movable base 100 gradually enters a zero-gravity posture. When the movable base 100 moves into the range of the fixed base 400 under the constraint of the guide component, as the height of the movable base 100 decreases, the user on the movable base 100 returns from a zero-gravity posture to a normal sitting posture.

[0127] In some examples, such as Figure 10 As shown, the first guide structure is formed as a first groove 401, and the second guide structure is formed as a second groove 402. Correspondingly, the first sliding member 403 and the second sliding member 404 are both formed as sliders.

[0128] The first groove 401 extends approximately horizontally. When the first sliding member 403 slides along the first groove 401, the movable base 100 maintains a constant height at the position where the first sliding member 403 is located. The height of the second groove 402 gradually increases. When the second sliding member 404 slides along the second groove 402, the height of the movable base 100 gradually increases or decreases at the position where the second sliding member 404 is located.

[0129] It is understandable that the sliding process of the first sliding component 403 within the first groove 401 and the sliding process of the second sliding component 404 within the second groove 402 occur simultaneously. The height change of the movable base 100 at the position where the first sliding component 403 is located is very small, while the height change of the movable base 100 at the position where the second sliding component 404 is located is relatively large. Therefore, under the combined limiting effect of the first groove 401 and the second groove 402, the movable base 100 can change its angle, thereby allowing the user to switch between a zero-gravity posture and a conventional sitting posture.

[0130] Specifically, the inner walls of the first groove 401 and the second groove 402 can be provided with corresponding pads. The first groove 401 and the second groove 402 contact the first sliding component 403 and the second sliding component 404 through the pads, thereby improving the smoothness of movement of the first sliding component 403 and the second sliding component 404.

[0131] Furthermore, the second groove 402 includes a first inclined portion 4021, a transition portion 4022, and a second inclined portion 4023. The first inclined portion 4021, the transition portion 4022, and the second inclined portion 4023 are interconnected. The transition portion 4022 is located between the first inclined portion 4021 and the second inclined portion 4023 and is used to connect the first inclined portion 4021 and the second inclined portion 4023.

[0132] Specifically, the first inclined portion 4021 is inclined to the horizontal plane, and its height gradually increases in the direction away from the first groove 401. The second inclined portion 4023 is also inclined to the horizontal plane, and its height gradually increases in the direction away from the first groove 401. Preferably, the transition portion 4022 is formed in an arc shape to ensure a smooth transition between the first inclined portion 4021 and the second inclined portion 4023.

[0133] It is worth noting that the tilt angle of the first inclined portion 4021 relative to the horizontal direction is greater than the tilt angle of the second inclined portion 4023 relative to the horizontal direction. When the second sliding component 404 slides within the first inclined portion 4021, the second sliding component 404 rises at a faster speed, thus giving the movable base 100 a faster speed of height increase, providing the user with a stronger sense of weightlessness and enhancing the user's weightless experience. When the second sliding component 404 slides within the second inclined portion 4023, the second sliding component 404 rises at a slower speed, thus giving the movable base 100 a slower speed of height increase, and the user's sense of weightlessness is weaker. Under the combined effect of the first inclined portion 4021 and the second inclined portion 4023, the user's senses gradually transition from weightlessness to zero gravity, enhancing comfort and improving the user experience.

[0134] Specifically, the tilt angle of the first tilting part 4021 relative to the horizontal direction is α, where α is set to 15° to 33°, and the tilt angle of the second tilting part 4023 relative to the horizontal direction is β, where β is set to 5° to 18°. When the tilt angles of the first tilting part 4021 and the second tilting part 4023 are within the above-mentioned angle range, it can be ensured that the tilt angle of the movable base 100 after completing the sliding process matches the user's zero-gravity posture.

[0135] In addition, the first groove 401 has an inclination angle of γ relative to the horizontal direction, which is set to -5° to 5°. The first groove 401 extends in an approximately horizontal direction. Combined with the inclination angle range of the first inclined part 4021 and the second inclined part 4023, it can further ensure that the user on the movable base 100 enters a zero-gravity posture.

[0136] In some examples, such as Figure 11 , Figure 12 , Figure 13 and Figure 14As shown, the seat frame includes a connecting mechanism 500. On one hand, the connecting mechanism 500 connects to the movable base 100; on the other hand, it connects to the rotating assembly. Simultaneously, the connecting mechanism 500 also connects to the fixed base 400. Specifically, the connecting mechanism 500 connects to the drive rod 302 in the rotating assembly. Therefore, the movable base 100, the rotating assembly, and the fixed base 400 are interconnected through the connecting mechanism 500, ensuring that the telescopic movement of the leg support mechanism 300 and the sliding movement of the movable base 100 are mutually coordinated.

[0137] The connecting mechanism 500 is hinged to the drive rod 302 of the rotating component and also hinged to the fixed base 400, and is rotatably connected to the movable base 100. When the rotating component 201 drives the drive rod 302 to rotate, the drive rod 302 drives the leg support mechanism 300 to extend and retract. Simultaneously, the drive rod 302 transmits force to the connecting mechanism 500, which then transmits the force to the fixed base 400. The fixed base 400 pushes the movable base 100 through a reaction force, causing the movable base 100 to slide relative to the fixed base 400. It is understood that under the aforementioned driving action, the movable base 100 also needs to slide according to the constraints of the first groove 401 and the second groove 402.

[0138] In some examples, such as Figure 15 As shown, the connecting mechanism 500 is formed as a linkage mechanism and includes a first link 501, a second link 502 and a third link 503, which are hinged together in sequence.

[0139] The first connecting rod 501 is hinged to the drive rod 302, and the third connecting rod 503 is hinged to the fixed base 400. The second connecting rod 502 includes a first hinge portion 5021, a second hinge portion 5022, and a rotatable connection portion 5023. The first connecting rod 501 is hinged to the second connecting rod 502 via the first hinge portion 5021, and the third connecting rod 503 is hinged to the second connecting rod 502 via the second hinge portion 5022. Simultaneously, the second connecting rod 502 is rotatably connected to the movable base 100 via the rotatable connection portion 5023.

[0140] Understandably, the second link 502 provides thrust to the movable base 100, thereby driving the movable base 100 to slide.

[0141] In some examples, to ensure that the direction of the thrust received by the movable base 100 matches the direction of movement of the movable base 100 under the combined action of the first groove 401 and the second groove 402, and to make the sliding process of the movable base 100 relative to the fixed base 400 smooth, the ratio of the distance between the rotating connection 5023 and the first hinge 5021 to the distance between the rotating connection 5023 and the second hinge 5022 is 1:1 to 1:3.

[0142] In some examples, such as Figure 1 As shown, the seat frame includes a back support mechanism 600, which is also formed as a linkage mechanism. On one hand, the back support mechanism 600 is hinged to a fixed base 400; on the other hand, it is hinged to a movable base 100, where the lengths of the links in the linkage mechanism cause the back support mechanism 600 to protrude from the fixed base 400. The back support mechanism 600 is used to mount a backrest, which supports the user's back.

[0143] The movable base 100 slides relative to the fixed base 400, causing the back support mechanism 600 to change angle. As the movable base 100 gradually moves out of the range of the fixed base 400, the angle between the back support mechanism 600 (for mounting the backrest) and the horizontal plane gradually decreases, allowing the user to gradually enter a weightless posture. As the movable base 100 gradually moves into the range of the fixed base 400, the angle between the back support mechanism 600 (for mounting the backrest) and the horizontal plane gradually increases, allowing the user to gradually enter a normal sitting posture.

[0144] Understandably, the angle adjustment process of the back support mechanism 600, the sliding process of the movable base 100, and the extension and retraction process of the leg support mechanism 300 are interconnected, allowing users to freely switch between a weightless posture and a regular sitting posture.

[0145] It is worth noting that when the angle between the back support mechanism 600, which is used to mount the backrest, and the horizontal plane is at its maximum, the back support mechanism 600 is in its extreme position, and at this time, the back support mechanism 600 is within the range of the fixed base 400. When the angle between the connecting rod of the back support mechanism 600, which is used to mount the backrest, and the horizontal plane decreases, the overall movement direction of the back support mechanism 600 is towards the movable base 100, and will not exceed the range of the fixed base 400.

[0146] Therefore, when the fixed base 400 is set against the wall, the back support mechanism 600 will not interfere with the wall during movement, that is, the seat frame of this application can achieve "zero wall contact".

[0147] In some examples, such as Figure 16 and Figure 17 As shown, the back support mechanism 600 includes a first back link 601, a second back link 602, a third back link 603, and a back link mounting component 604.

[0148] The first end of the first back link 601 is hinged to the fixed base 400, and the second end of the first back link 601 is hinged to the back link mounting component 604. The first end of the second back link 602 is hinged to the fixed base, and the second end of the second back link 602 is hinged to the back link mounting component 604.

[0149] As can be seen from the above, the first back link 601 and the second back link 602 are identical in terms of hinge relationship. However, the specific hinge position of the first end of the first back link 601 and the specific hinge position of the first end of the second back link 602 are different, and the specific hinge position of the second end of the first back link 601 and the specific hinge position of the second end of the second back link 602 are also different.

[0150] Furthermore, in the vertical direction, the hinge position of the first end of the first back link 601 is greater than the hinge position of the first end of the second back link 602. In the horizontal direction, the hinge position of the first end of the second back link 602 is closer to the movable base 100 than the hinge position of the first end of the first back link 601.

[0151] Meanwhile, there is a certain gap between the hinge position of the second end of the first back link 601 and the hinge position of the second end of the second back link 602.

[0152] Therefore, the first back link 601, the fixed base 400, the second back link 602, and the back link mounting component 604 form a four-bar linkage. When the first back link 601 rotates relative to the fixed base 400, the angle of the second back link 602 relative to the fixed base 400 also changes due to the constraint of the four-bar linkage. Since the hinge positions of the first ends of the first back link 601 and the second back link 602 are different, the forces applied by the first back link 601 and the second back link 602 to the back link mounting component 604 during rotation also differ in direction, thereby driving the back link mounting component 604 to rotate.

[0153] Furthermore, the first end of the third back link 603 is hinged to the movable base 100, and the second end of the third back link 603 is hinged to the first back link 601. Thus, the first back link 601, the fixed base 400, the second back link 602, and the back link mounting component 604 form a connection between the movable base 100 and the fixed base 400. When the movable base 100 slides relative to the fixed base 400, the movable base 100 drives the third back link 603 to perform a combined motion including movement and rotation. The third back link 603 then transmits force to the first back link 601, thereby applying a driving force to the first back link 601, causing the first back link 601 to rotate.

[0154] In some examples, the backrest linkage mounting component 604 is fixedly connected to a backrest mounting plate 605, which is used to mount the backrest. When the first backrest linkage 601, the second backrest linkage 602, and the third backrest linkage 603 move in coordination, the backrest linkage mounting component 604 rotates, thereby causing the backrest mounting plate 605 to rotate. At this time, the angle of the backrest changes, thus adapting to the user's normal sitting posture or weightless posture.

[0155] In some examples, the side edge of the first back link 601 is provided with an extension 6011, which extends towards the side of the first back link 601 away from the movable base 100. The second end of the third back link 603 is hinged to the extension 6011. It is understood that the hinge position of the second end of the third back link 603 is offset from the line connecting the first and second ends of the first back link 601, thereby ensuring that the back link mounting component 604 can be at the required angle. It is also understood that the hinge position of the second end of the third back link 603 and the length of the third back link 603 can limit the rotation speed of the back link mounting component 604. Users can adaptively adjust the above variables according to actual needs to ensure the rotation amplitude and rotation speed of the back link mounting component 604.

[0156] In some examples, when the user is in a weightless posture, the angle between the user's back and thighs is λ, which is between 121° and 135°. In the seat frame of this application, the top of the movable base 100 is provided with a seat cushion, which defines the position of the user's thighs. The backrest linkage mounting component 604 is provided with a backrest mounting plate 605, which is used to mount the backrest and defines the position of the user's back. Therefore, when the user is in a weightless posture, the angle between the backrest and the seat cushion is also between 121° and 135°, that is, the angle between the movable base 100 and the backrest mounting plate 605 is between 121° and 135°.

[0157] Specifically, when the first sliding member 403 slides to the end of the first groove 401 and the second sliding member 404 slides to the end of the second inclined portion 4023, the angle between the movable base 100 and the backrest mounting plate 605 is between 121° and 135°, placing the user in a weightless posture. It can be understood that when the first sliding member 403 slides to the opposite end of the first groove 401 and the second sliding member 404 slides to the end of the first inclined portion 4021, the angle between the movable base 100 and the backrest mounting plate 605 decreases, placing the user in a normal sitting posture.

[0158] This application provides a seating device including the aforementioned seat frame. The seating device further includes a seat cushion, a backrest, and a leg rest. The seat cushion is connected to the top of the movable base 100 and is used to support the user's thighs; the backrest is connected to the back support mechanism 600 and is used to support the user's back; the leg rest is connected to the leg support mechanism 300 and is used to support the user's legs.

[0159] In actual use, the movable base 100 is within the range of the fixed base 400, the leg support mechanism 300 is at the bottom of the movable base 100, and the angle between the backrest mounting plate 605 in the back support mechanism 600 and the movable base 100 is minimal, with the user in a normal sitting posture. When the movable base 100 moves out of the range of the fixed base 400 and reaches its limit position, the leg support mechanism 300 extends to the outside of the movable base 100, and the angle between the backrest mounting plate 605 in the back support mechanism 600 and the movable base 100 is at its maximum, between 121° and 135°, with the user in a zero-gravity sitting posture.

[0160] Meanwhile, the rotating component 201 is rotatably supported on the movable base 100, ensuring synchronous movement of all parts of the rotating component 201, preventing vibration of the leg support mechanism 300, and ensuring balanced torque between the two leg support mechanisms 300, thus improving the user experience. Simultaneously, the driver 202 is positioned near the side frame 101, and the rotating component 201 is located at the edge of the movable base 100, preventing the sunken serpentine spring in the seat from contacting the driver 202 and the rotating component 201, improving the user's seating comfort. Furthermore, the back support mechanism 600 remains within the range of the fixed base 400, achieving zero wall contact with the seat frame. Furthermore, the second guide structure is used to limit the sliding direction of the movable base 100 relative to the fixed base 400. When the second sliding component 404 moves to the first tilting part 4021, it can enhance the user's sense of weightlessness. When the second sliding component 404 moves to the second tilting part 4023, it can reduce the user's sense of weightlessness. As a transition between weightlessness and zero gravity, it can fully enhance the user's experience. The first tilting part 4021 and the second tilting part 4023 can also adjust the tilt angle of the movable base to ensure that the user can reach a zero-gravity posture.

[0161] The embodiments of this application have been described in detail above with reference to the accompanying drawings. However, this application is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of this application. Furthermore, unless otherwise specified, the embodiments and features described in the embodiments of this application can be combined with each other.

Claims

1. A support transmission device, characterized in that, include: Active base; A driving mechanism, the driving mechanism including a rotating component supported on the movable base, the rotating component being rotatably disposed on the movable base; A leg support mechanism is fixedly connected to the rotating component. The leg support mechanism includes a leg extension assembly. The rotating component drives the leg extension assembly to rotate, thereby causing the leg extension assembly to extend or retract.

2. The support transmission device according to claim 1, characterized in that, The driving mechanism includes a driver, one end of which is hinged to the movable base, and the other end of which is hinged to the rotating component. The driver is positioned close to the side edge of the movable base.

3. The support transmission device according to claim 2, characterized in that, The drive mechanism further includes a driver mounting component, which is fixedly disposed on the rotating component and extends outward from the rotating component. The driver mounting component is hinged to the driver.

4. The support transmission device according to claim 2, characterized in that, The movable base includes side frames disposed on opposite sides and a horizontal frame connected between each of the side frames. The two ends of the rotating component are rotatably connected to each of the side frames, and the end of the driver is hinged to the horizontal frame.

5. The support transmission device according to claim 4, characterized in that, The rotating component has a first insertion hole at its end, and the side frame has a first support extending toward the rotating component. The first support is inserted into the first insertion hole to form a rotatable connection.

6. The support transmission device according to claim 4, characterized in that, The rotating component has a second support extending outward at its end, and the side frame has a second insertion hole. The second support is inserted into the second insertion hole to form a rotatable connection.

7. The support transmission device according to claim 4, characterized in that, The rotating component is connected to the side frame near the end of the side frame.

8. The support transmission device according to claim 1, characterized in that, The leg support mechanism further includes a drive rod, which is fixedly connected to the rotating component and hinged to the leg telescopic assembly.

9. The support transmission device according to claim 8, characterized in that, The leg telescopic assembly includes a first telescopic unit, which is hinged to the drive rod and the movable base. The drive rod drives the first telescopic unit to extend or retract by rotation.

10. The support transmission device according to claim 9, characterized in that, The first telescopic unit includes a first leg link, a second leg link, a third leg link, and a leg link mounting component. The first leg link is hinged to the movable base, the third leg link is hinged between the drive rod and the leg link mounting component, and the second leg link is hinged to the leg link mounting component, the drive rod, and the first leg link.

11. The support transmission device according to claim 10, characterized in that, The first leg link and the leg link mounting component are hinged to both ends of the second leg link, and the drive rod is hinged to the middle of the second leg link; the movable base and the third leg link are hinged to both ends of the drive rod, and the second leg link is hinged to the middle of the drive rod.

12. A seating frame, characterized in that, include: Fixed base; A movable base is provided, and a guide component is provided between the fixed base and the movable base. The movable base is slidably disposed on the fixed base through the guide component. A drive mechanism, comprising a rotating component and a driver, wherein the rotating component is a rotating rod rotatably supported on the movable base, and the driver is hinged to the rotating component via a driver mounting component; A leg support mechanism, comprising a drive rod fixedly connected to the rotating component and a leg extension assembly hinged to the drive rod, wherein the rotating component and the drive rod drive the leg extension assembly to extend or retract by rotation.

13. The seat frame according to claim 12, characterized in that, The guiding assembly includes a first guiding structure and a second guiding structure disposed on the fixed base, wherein the first guiding structure has an inclination angle of -5° to 5° relative to the horizontal direction.

14. The seat frame according to claim 13, characterized in that, The second guide structure includes a first inclined portion and a second inclined portion, wherein the first inclined portion has an inclination angle of 15° to 33° relative to the horizontal direction, and the second inclined portion has an inclination angle of 5° to 18° relative to the horizontal direction.

15. The seat frame according to claim 12, characterized in that, The seat frame also includes a connecting mechanism, which is rotatably disposed on the movable base and hinged between the rotating component and the fixed base.

16. The seat frame according to claim 15, characterized in that, The connecting mechanism includes a first link, a second link, and a third link. The second link includes a first hinge portion hinged to the first link, a second hinge portion hinged to the third link, and a rotating connection portion rotatably connected to the movable base. The rotating connection portion is located between the first hinge portion and the second hinge portion. The first link is hinged to the drive rod, and the third link is hinged to the fixed base.

17. The seat frame according to claim 16, characterized in that, The ratio of the distance between the rotating connection and the first hinge to the distance between the rotating connection and the second hinge is 1:1 to 1:

3.

18. The seat frame according to claim 14, characterized in that, The seat frame also includes a back support mechanism, which includes a first back link, a second back link, a third back link, and a back link mounting component. The first back link and the second back link are both hinged between the back link mounting component and the fixed base. The third back link is hinged between the first back link and the movable base. The side edge of the first back link has an outwardly extending extension, and the end of the third back link is hinged to the extension.

19. The seat frame according to claim 18, characterized in that, The backrest mounting component is fixedly connected to the backrest mounting plate. When the first sliding component slides to the end of the first guide structure and the second sliding component slides to the end of the second inclined part, the movable base is at an angle of 121° to 135° with the backrest mounting plate.

20. A seating arrangement comprising a seat frame as described in any one of claims 12 to 19.

Images