Seat frame and seat

Abstract

The seat frame comprises a movable base and a leg supporting mechanism, the movable base comprises side frames arranged on the two opposite sides and a cross beam arranged between the side frames, the cross beam is provided with a connecting protrusion, and the cross beam is connected to the side frames through the connecting protrusion; the leg supporting mechanism is hinged to the movable base, the cross beam comprises an avoiding part, and the avoiding part is obliquely arranged to avoid the leg supporting mechanism. The cross beam of the movable base is provided with a connecting bulge, so that the contact area between the cross beam and the side frame is increased, and the connecting stability of the cross beam is improved; the cross beam comprises an inclined avoiding part to avoid a connecting rod of the leg supporting mechanism, the leg supporting mechanism is prevented from interfering with the cross beam in the rotating process, and the movement process of the leg supporting mechanism is guaranteed.

Description

Technical Field

[0001] This application relates to the technical field of furniture, and particularly relates to a seat frame and a seat. Background Art

[0002] A zero-gravity seat is a seat design that mimics the pressure state of the human body in a space weightless environment. It is usually equipped with an adjustable backrest, seat cushion, and leg rest. Users can adjust the angle of the seat according to their own needs and comfort to find the most suitable zero-gravity posture for themselves.

[0003] To ensure the structural stability of the seat frame in the seat, the seat frame is provided with crossbeams. However, the connection strength between the crossbeams and other structures of the seat frame is relatively low, making it difficult to ensure the stable position of the crossbeams. At the same time, the crossbeams are also prone to interference with the transmission structure in the seat frame, affecting the movement of the backrest, seat cushion, and leg rest. Summary of the Invention

[0004] This application aims to at least solve one of the technical problems existing in the prior art. For this reason, this application proposes a seat frame, and this application also proposes a seat having the above-mentioned seat frame.

[0005] The seat frame according to the first aspect embodiment of this application includes:

[0006] A movable base;

[0007] A driving mechanism, the driving mechanism includes a rotating member supported on the movable base, and the rotating member is rotatably arranged on the movable base;

[0008] A leg support mechanism, the leg support mechanism is fixedly connected to the rotating member, the leg support mechanism includes a leg telescopic assembly, and the rotating member drives the leg telescopic assembly to rotate by rotation to drive the leg telescopic assembly to extend or contract;

[0009] Wherein, the rotating member is detachably arranged on the movable base.

[0010] The seat frame according to the embodiment of this application has at least the following beneficial effects: The structure of "the rotating member is rotatably arranged on the movable base" increases the anti-deformation strength of the movable base through the rotating member; the structure of "the rotating member is detachably arranged on the movable base" simplifies the installation difficulty of the rotating member and the replacement of the deformed rotating member.

[0011] The movable base includes side frames arranged on opposite sides and crossbeams arranged between the side frames. The crossbeams are provided with connecting protrusions, and the crossbeams are connected to the side frames through the connecting protrusions.

[0012] The seat frame according to the embodiments of the present application has at least the following beneficial effects: The cross beam of the movable base is provided with a connecting protrusion, thereby increasing the contact area between the cross beam and the side frame and improving the connection stability of the cross beam; the cross beam includes an inclined avoidance portion to avoid the connecting rod of the leg support mechanism and prevent interference between the leg support mechanism and the cross beam during rotation, ensuring the movement process of the leg support mechanism.

[0013] According to some embodiments of the present application, the connecting protrusion is disposed on the avoidance portion. The connecting protrusion includes a straight portion and a bent portion connected to the straight portion. The bent portion is connected to the avoidance portion, and the straight portion and the bent portion are integrally connected to the side frame by welding respectively.

[0014] The leg support mechanism is hinged to the movable base. The cross beam includes a covering portion and an avoidance portion. The avoidance portion is angularly connected to the covering portion, and the avoidance portion is inclined to avoid the leg support mechanism.

[0015] According to some embodiments of the present application, the movable base includes side frames disposed on opposite sides and two cross beams disposed between the side frames. One of the cross beams further includes a covering portion, an avoidance portion, and an extension portion. The extension portion is angularly connected to the covering portion, and the extension portion and the avoidance portion are located on opposite sides of the covering portion;

[0016] The rotating member is rotatably disposed on the side frame. The covering portion covers the top of the rotating member, and the avoidance portion and the extension portion are located on opposite sides of the rotating member.

[0017] According to some embodiments of the present application, a gasket is provided between the rotating member and the side frame; a first insertion hole is provided at an end of the rotating member, and a first support column inserted into the first insertion hole is provided on the side frame. The gasket is sleeved on the first support column and is located between the side frame and the rotating member.

[0018] According to some embodiments of the present application, the movable base includes an elastic member. The avoidance portion is provided with a hanging ear. The hollow portion of the hanging ear defines the hanging channel. A hook is provided on the other cross beam. One end of the elastic member is hung on the hanging channel, and the other end of the elastic member is hung on the hook.

[0019] According to some embodiments of the present application, the height of the hanging channel is lower than the height of the hook.

[0020] According to some embodiments of the present application, a buffer structure is provided inside one of the cross beams. The buffer structure is provided with a matching arc surface matching the shape of the rotating member, and the buffer structure contacts the rotating member through the matching arc surface.

[0021] According to some embodiments of the present application, the avoidance portion is provided with a first card slot, and the buffer structure is provided with a first clamping portion embedded in the first card slot. The buffer structure and the avoidance portion are connected through the first clamping portion and the first card slot.

[0022] According to some embodiments of the present application, the extension portion is provided with a second card slot, and the buffer structure is provided with a second clamping portion embedded in the second card slot. The buffer structure and the extension portion are connected through the second clamping portion and the second card slot.

[0023] According to some embodiments of the present application, the seat frame further includes a fixed base, and the movable base, the leg support mechanism and the fixed base are interconnected through a connecting mechanism. The movable base is provided with an outer extension rod extending outward and an inner extension rod extending inward, and the inner extension rod is located above the connecting mechanism;

[0024] Wherein, the connecting mechanism and / or the leg support mechanism is located below the connecting protrusion.

[0025] According to some embodiments of the present application, the seat frame further includes a back support mechanism. The back support mechanism includes a first back link, a second back link, a third back link and a back link mounting member. The first end of the first back link is hinged to the fixed base, the second end of the first back link is hinged to the back link mounting member, the first end of the second back link is hinged to the fixed base, the second end of the second back link is hinged to the back link mounting member, the first end of the third back link is hinged to the movable base, and the second end of the third back link is hinged to the first back link;

[0026] Wherein, an outer extension portion is provided on the side edge of the first back link, and a limiting plate for abutting against the third back link is provided on the outer extension portion.

[0027] According to the seat of the second aspect embodiment of the present application, the seat includes a seat cushion, a backrest and the above-mentioned seat frame. The seat cushion is mounted on the top of the movable base, and the backrest is detachably connected to the seat cushion.

[0028] The seat frame further includes a back support mechanism. The back support mechanism includes a first back link, a second back link, a third back link and a back link mounting member. The first end of the first back link is hinged to the fixed base, the second end of the first back link is hinged to the back link mounting member, the first end of the second back link is hinged to the fixed base, the second end of the second back link is hinged to the back link mounting member, the first end of the third back link is hinged to the movable base, and the second end of the third back link is hinged to the first back link;

[0029] Wherein, an outer extension portion is provided on the side edge of the first back link, and a limiting plate for abutting against the third back link is provided on the outer extension portion.

[0030] The seating furniture according to the embodiments of the present application has at least the following beneficial effects: By adopting the seat frame of the first aspect embodiment of the present application, the seat frame includes a movable base and a leg support mechanism. The cross beam of the movable base is provided with a connecting protrusion, thereby increasing the contact area between the cross beam and the side frame and enhancing the connection stability of the cross beam. The cross beam includes an inclined avoidance portion to avoid the connecting rod of the leg support mechanism, preventing interference between the leg support mechanism and the cross beam during rotation and ensuring the movement process of the leg support mechanism.

[0031] According to some embodiments of the present application, the seat cushion and the backrest are connected by a zipper.

[0032] According to some embodiments of the present application, the seat cushion is provided with a first flexible extension section, the backrest is provided with a second flexible extension section, and the zipper is arranged between the first flexible extension section and the second flexible extension section.

[0033] According to some embodiments of the present application, the seating furniture further includes a back panel, the back panel is detachably arranged on the fixed base, and when the seating furniture is in a zero-gravity posture, the gap between the back panel and the backrest is greater than or equal to 10 cm.

[0034] According to some embodiments of the present application, the rotating member is connected to the movable base by screws.

[0035] Additional aspects and advantages of the present application will be given in part in the following description, become apparent in part from the following description, or be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] The following further demonstrates the present application in conjunction with the drawings and embodiments. It should be noted that the embodiments shown in the following drawings are exemplary and are only used to explain the present application and should not be construed as a limitation to the present application.

[0037] Figure 1 is a schematic structural diagram of the seat frame according to the embodiment of the present application in a normal sitting posture;

[0038] Figure 2 is a schematic structural diagram of the seat frame according to the embodiment of the present application in a normal sitting posture with the cross beam removed;

[0039] Figure 3 is a schematic structural diagram of the seat frame according to the embodiment of the present application in a zero-gravity posture with the cross beam removed;

[0040] Figure 4 is a schematic structural diagram of the seat frame according to the embodiment of the present application;

[0041] Figure 5 is a cross-sectional view of the position where the cross beam of the seat frame according to the embodiment of the present application is provided with a connecting protrusion;

[0042] Figure 6 is the partial enlarged view of part A in the seat frame of the embodiment of the present application Figure 4 in the embodiment of the present application;

[0043] Figure 7 is the sectional view of the position where the cross beam in the seat frame of the embodiment of the present application is provided with a buffer structure;

[0044] Figure 8 is the structural schematic diagram of the buffer structure in the seat frame of the embodiment of the present application;

[0045] Figure 9 is the side view of the buffer structure in the seat frame of the embodiment of the present application;

[0046] Figure 10 is the front view of the seat frame of the embodiment of the present application;

[0047] Figure 11 is the seat frame of the embodiment of the present application Figure 10 in the partial enlarged view of part B;

[0048] Figure 12 is the schematic diagram of the cross beam installed on the movable base in the seat frame of the embodiment of the present application;

[0049] Figure 13 is the sectional view of the connection mode between the movable base and the rotating part in the seat frame of the embodiment of the present application;

[0050] Figure 14 is the structural schematic diagram of the leg support mechanism in the seat frame of the embodiment of the present application;

[0051] Figure 15 is the structural schematic diagram of the leg support mechanism in the seat frame of the embodiment of the present application;

[0052] Figure 16 is the schematic diagram of the connection mechanism installed on the seat frame in the seat frame of the embodiment of the present application;

[0053] Figure 17 is the front view of the connection mechanism of the seat frame of the embodiment of the present application;

[0054] Figure 18 is the structural schematic diagram of the back support mechanism in the seat frame of the embodiment of the present application;

[0055] Figure 19 is the structural schematic diagram of the back support mechanism in the seat frame of the embodiment of the present application;

[0056] Figure 20 is the structural schematic diagram of the seat of the embodiment of the present application;

[0057] Figure 21 is the connection schematic diagram of the backrest cushion and the seat cushion in the seat of the embodiment of the present application;

[0058] Figure 22 is a partial enlarged view of part C in the seat of the embodiment of the present application Figure 21 in the figure.

[0059] Reference numerals:

[0060] Movable base 100; side frame 101; first pillar 1011; second jack 1012; another cross beam 103; hook 1021; one of the cross beams 102; avoidance part 1031; hanging ear 10311; hanging channel 103111; first card slot 10312; covering part 1032; extending part 1033; second card slot 10331; connecting protrusion 1034; straight part 10341; bending part 10342; buffer structure 104; mating arc surface 1041; first clamping part 1042; second clamping part 1043; gap 1044;

[0061] Drive mechanism 200; rotating member 201; first jack 2011; second pillar 2012; driver 202; driver mounting member 203; gasket 204;

[0062] 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 member 306; fourth leg link 307; fifth leg link 308;

[0063] Fixed base 400;

[0064] Connection mechanism 500; first link 501; second link 502; first hinge part 5021; second hinge part 5022; rotating connection part 5023; third link 503;

[0065] Back support mechanism 600; first back link 601; extension part 6011; limit plate 6012; second back link 602; third back link 603; back link mounting member 604; backrest mounting plate 605;

[0066] Seat cushion 701; first flexible extension section 7011; backrest 702; second flexible extension section 7021; zipper 703; back plate 704; back plate mounting structure 705; outer extension rod 706; inner extension rod 707. Detailed implementation manners

[0067] The embodiments of the present application will be described in detail below with reference to the accompanying drawings, where the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application and should not be construed as a limitation of the present application.

[0068] In the description of the present application, it should be understood that if terms such as "center", "middle part", "longitudinal direction", "transverse direction", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial direction", "radial direction", "circumferential direction", etc. are used to indicate the orientation or positional relationship, it is based on the orientation or positional relationship shown in the drawings. This is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present application.

[0069] In the description of the present application, the meaning of "several" is more than one, the meaning of "multiple" is more than two, and understandings such as "greater than", "less than", "exceeding", etc. do not include the recited number, and understandings such as "above", "below", "within", etc. include the recited number. If the first and second are described only for the purpose of distinguishing technical features, they should not be construed as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or implicitly indicating the sequence relationship of the indicated technical features.

[0070] In the description of the present application, unless otherwise clearly specified and limited, the terms "arranged", "installed", "connected", "coupled" should be understood in a broad sense. For example: it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0071] In the description of the present application, if descriptions of reference terms such as "one embodiment", "some embodiments", "one example", "some examples", "some embodiments", "schematic embodiments", "examples", "specific examples", "some examples", etc. are used, it means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic descriptions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0072] As Figure 1 、 Figure 2 and Figure 3 shown, the embodiment of the present application provides a seat frame, and the seat frame includes:

[0073] A movable base 100;

[0074] The driving mechanism 200, the driving mechanism 200 includes a rotating member 201 supported on the movable base 100, and the rotating member 201 is rotatably arranged on the movable base 100;

[0075] The leg support mechanism 300, the leg support mechanism 300 is fixedly connected to the rotating member 201, the leg support mechanism 300 includes a leg telescopic assembly 301, and the rotating member 201 drives the leg telescopic assembly 301 to rotate by rotation, so as to drive the leg telescopic assembly 301 to extend or contract;

[0076] Wherein, the rotating member 201 is detachably arranged on the movable base 100.

[0077] The rotating member 201 is rotatably arranged on the movable base 100 for increasing the anti-deformation strength of the movable base 100; the rotating member 201 is detachably arranged on the movable base 100 for simplifying the installation difficulty of the rotating member 201 and facilitating the replacement of the deformed rotating member 201.

[0078] Such as Figure 4 、 Figure 5 and Figure 6 As shown, the movable base 100 includes side frames 101 arranged on opposite sides and cross beams arranged between the side frames 101. One of the cross beams 103 is provided with a connecting protrusion 1034, and one of the cross beams 103 is connected to the side frame 101 through the connecting protrusion 1034.

[0079] One of the cross beams 103 is provided with a connecting protrusion 1034, so as to increase the contact area between one of the cross beams 103 and other structures of the movable base 100 and ensure the connection strength; one of the cross beams 103 of the movable base 100 is provided with a connecting protrusion 1034, so as to increase the contact area between one of the cross beams 103 and the side frame 101 and improve the connection stability of one of the cross beams 103.

[0080] One of the cross beams 103 can avoid the movement path of the leg support mechanism 300, so as to prevent the leg support mechanism 300 from interfering with one of the cross beams 103 during the movement, and enable the seat frame to smoothly perform posture conversion; one of the cross beams 103 includes an inclined avoidance portion 1031 to avoid the connecting rod of the leg support mechanism 300, so as to prevent the leg support mechanism 300 from interfering with one of the cross beams 103 during the rotation and ensure the movement process of the leg support mechanism 300.

[0081] Such as Figure 5 and Figure 6As shown, the connecting protrusion 1034 is provided on the avoiding portion 1031. The connecting protrusion 1034 includes a straight portion 10341 and a bent portion 10342 connected to the straight portion 10341. The bent portion 10342 is connected to the avoiding portion 1031. The straight portion 10341 and the bent portion 10342 are respectively integrally connected to the side frame 101 by welding. The connecting protrusion 1034 is welded to the side frame 101 in multiple directions to increase the connection strength between one of the cross beams 103 and the side frame 101.

[0082] The leg support mechanism 300 is hinged to the movable base 100. One of the cross beams 103 includes a covering portion 1032 and an avoiding portion 1031. The avoiding portion 1031 is angularly connected to the covering portion 1032. The avoiding portion 1031 is inclined to avoid the leg support mechanism 300.

[0083] Advantages of the inclined setting of the avoiding portion 1031: 1. The avoiding portion 1031 provides more installation space for the buffer structure 104; 2. After the buffer structure 104 is impacted, the inclined setting of the avoiding portion 1031 can relieve part of the impact force transmitted by the buffer structure 104; 3. The inclined setting of the avoiding portion 1031 facilitates the stamping forming of the hanging ear 10311.

[0084] The movable base 100 includes side frames 101 provided on opposite sides and two cross beams provided between the respective side frames 101. One of the cross beams 103 further includes a covering portion 1032, an avoiding portion 1031, and an extending portion 1033. The extending portion 1033 is angularly connected to the covering portion 1032. The extending portion 1033 and the avoiding portion 1031 are located on opposite sides of the covering portion 1032;

[0085] The rotating member 201 is rotatably provided on the side frame 101. The covering portion 1032 covers the top of the rotating member 201. The avoiding portion 1031 and the extending portion 1033 are located on opposite sides of the rotating member 201.

[0086] As Figure 10 、 Figure 11 and Figure 13 shown, a gasket 204 is provided between the rotating member 201 and the side frame 101; a first jack 2011 is provided at the end of the rotating member 201, and a first pillar 1011 inserted into the first jack 2011 is provided on the side frame 101. The gasket 204 is sleeved on the first pillar 1011 and is located between the side frame 101 and the rotating member 201.

[0087] The gasket 204 is made of a non-metal. When the gasket 204 is located between the side frame 101 and the rotating member 201, the gasket 204 is used to prevent direct friction between the rotating member 201 and the side frame 101; the rotating member 201 is made of metal, and the side frame 101 is made of metal.

[0088] As Figure 4 and Figure 7 shown, the movable base 100 includes an elastic member. The avoidance portion 1031 is provided with a hanging ear 10311. The hollow portion of the hanging ear 10311 defines a hanging channel 103111. A hook 1021 is provided on another cross beam 102. One end of the elastic member is hung in the hanging channel 103111, and the other end of the elastic member is hung on the hook 1021.

[0089] The hanging channel 103111 enables the hanging ear 10311 to connect the elastic member without dead angle in its circumferential direction. Therefore, one end of the elastic member is first hung in the hanging channel 103111, and then the elastic member is hung on the hook 1021. This structure first ensures the connection strength of the elastic member through the hanging ear 10311, and then reduces the connection difficulty of the elastic member through the hook 1021.

[0090] As Figure 4 shown, the height of the hanging channel 103111 is lower than the height of the hook 1021. This structure makes the resilience of the elastic member on the side of the hook 1021 higher than the resilience of the elastic member on the side of the hanging channel 103111, that is, the elasticity of the back side of the seat is higher than the elasticity of the front side of the seat, so as to provide a certain auxiliary force to help the user get up from the seat, especially suitable for elderly users.

[0091] As Figure 7 、 Figure 8 and Figure 9 shown, a buffer structure 104 is provided inside one of the cross beams 102. The buffer structure 104 is provided with a mating arc surface 1041 that matches the shape of the rotating member 201. The buffer structure 104 contacts the rotating member 201 through the mating arc surface 1041.

[0092] The buffer structure 104 is used to increase the anti-deformation ability of one of the cross beams 102; the mating arc surface 1041 is used to increase the contact area between the buffer structure 104 and the rotating member 201. The rotating member 201 includes a connecting rod and a driver mounting member 203. The connecting rod is detachably provided on the movable base 100, and the connecting rod and the movable base 100 are connected by screws.

[0093] As Figure 12 shown, there is a gap 1044 between the buffer structure 104 and the rotating member 201. The gap 1044 is used to reduce the rotation resistance of the rotating member 201 during normal operation. That is, there is a gap 1044 between the buffer structure 104 and the connecting rod, and the buffer structure 104 is located above the connecting rod.

[0094] In addition, the buffer structure 104 is made of plastic, and the movable base 100 is made of metal. The buffer structure 104 absorbs a part of the impact force from the extension portion 1033 to reduce the probability of deformation of the rotating member 201 after being externally impacted.

[0095] As Figure 7 shown, the avoidance part 1031 is provided with a first card slot 10312, the buffer structure 104 is provided with a first clamping part 1042 embedded in the first card slot 10312, and the buffer structure 104 and the avoidance part 1031 are connected through the first clamping part 1042 and the first card slot 10312. And / or, the extension part 1033 is provided with a second card slot 10331, the buffer structure 104 is provided with a second clamping part 1043 embedded in the second card slot 10331, and the buffer structure 104 and the extension part 1033 are connected through the second clamping part 1043 and the second card slot 10331.

[0096] As Figure 1 and Figure 2 shown, the seat frame further includes a fixed base 400, and the movable base 100, the leg support mechanism 300 and the fixed base 400 are connected to each other through a connection mechanism 500. The movable base 100 is provided with an outwardly extending outer extension rod and an inwardly extending inner extension rod, and the inner extension rod is located above the connection mechanism 500;

[0097] Wherein, the connection mechanism 500 and / or the leg support mechanism 300 is located below the connection protrusion 1034.

[0098] As Figure 2 、 Figure 20 and Figure 21 shown, the seat cushion 701 is hung on the outer extension rod 706. When the seat cushion 701 is hung on the outer extension rod 706, the bottom surface of the seat cushion 701 abuts against the top surface of the inner extension rod 707; this structure defines the lowest position of the seat cushion 701 to prevent the seat cushion 701 from contacting the connection mechanism 500, especially after the user sits on the seat cushion 701, the seat cushion 701 contacts the connection mechanism 500.

[0099] The connection protrusion 1034 protrudes upward. When the connection mechanism 500 and / or the leg support mechanism 300 is located below the connection protrusion 1034, due to the upward protrusion of the connection protrusion 1034, therefore, the movement space of the connection mechanism 500 and the leg support mechanism 300 is further increased to avoid interference between the connection mechanism 500 and / or the leg support mechanism 300 and one of the cross beams 102.

[0100] As Figure 18 and Figure 19As shown, the seat frame further includes a backrest support mechanism 600. The backrest support mechanism 600 includes a first backlink 601, a second backlink 602, a third backlink 603, and a backlink mounting member 604. The first end of the first backlink 601 is hinged to the fixed base 400, and the second end of the first backlink 601 is hinged to the backlink mounting member 604. The first end of the second backlink 602 is hinged to the fixed base 400, and the second end of the second backlink 602 is hinged to the backlink mounting member 604. The first end of the third backlink 603 is hinged to the movable base 100, and the second end of the third backlink 603 is hinged to the first backlink 601.

[0101] Wherein, an extension portion 6011 is provided on the side edge of the first backlink 601, and a limiting plate 6012 for abutting against the third backlink 603 is provided on the extension portion 6011.

[0102] After the third backlink 603 abuts against the limiting plate 6012, the third backlink 603 cannot continue to rotate downward. The limiting plate limits the lower limit position of the third backlink 603 to prevent the seat from being unable to switch from the zero-gravity posture back to the regular sitting posture.

[0103] As Figure 19 shown, the seat includes a seat cushion 701, a backrest 702, and the above-mentioned seat frame. The seat cushion 701 is installed on the top of the movable base 100. The backrest 702 is detachably connected to the seat cushion 701, and the seat cushion 701 is also detachably connected to the backlink mounting member 604.

[0104] The seat cushion 701 and the backrest 702 are connected by a zipper 703. As Figure 21 and Figure 22 shown, the seat cushion 701 is provided with a first flexible extension section 7011, the backrest 702 is provided with a second flexible extension section 7021, and the zipper 703 is arranged between the first flexible extension section 7011 and the second flexible extension section 7021. The first flexible extension section 7011 and the second flexible extension section 7021 can hide the zipper 703 inside the seat, that is, hidden by the seat cushion 701 and the backrest 702.

[0105] As Figure 20 shown, the seat further includes a backboard 704, and the backboard 704 is detachably arranged on the fixed base 400. When the seat is in the zero-gravity posture, the gap between the backboard 704 and the backrest 702 is greater than or equal to 10 cm.

[0106] When the backboard 704 is detachably arranged on the fixed base 400 and the gap between the backboard 704 and the backrest 702 is greater than or equal to 10 cm, the user can reach into the fixed base 400 and remove the backboard 704 from the fixed base 400.

[0107] As Figure 11As shown, the rotating component 201 is connected to the movable base 100 by screws. The rotating component 201 and the gasket 204 can be conveniently replaced by screws.

[0108] At present, the seats that can realize the mutual switching between the conventional sitting posture and the zero-gravity posture are all provided with a leg support mechanism 300. In the conventional sitting posture, the user's legs can hang freely. In the zero-gravity posture, the user's legs will be gradually lifted as the leg support mechanism 300 rises. Among them, such seats are provided with a driving mechanism 200. The driver 202 located at the bottom of the seat cushion 701 can drive the driving mechanism 200 to move, and the driving mechanism 200 will drive the leg support mechanism 300 to move during the movement.

[0109] As Figure 3 shown, the driver 202 is often connected to the middle of the driving mechanism 200, and the middle of the driving mechanism corresponds to the middle of the seat cushion 701. However, the seat cushion 701 usually includes a plurality of serpentine springs. The serpentine springs are elastic components. It can be understood that the end positions of each serpentine spring connected to the edge of the seat cushion 701 have weak deformation ability, and the middle positions of each serpentine spring have strong deformation ability. The driver 202 corresponds to the position where the serpentine spring has strong deformation ability.

[0110] When the user sits on the top of the seat cushion 701, the middle of the serpentine spring is more likely to sink, causing the middle of the serpentine spring to contact the driver 202, thus affecting the user's sitting feeling.

[0111] To avoid the serpentine spring in the seat cushion 701 from contacting the driver 202, the driver 202 can be offset, that is, deviated from the middle of the driving mechanism 200. However, in the current seats, the driving mechanism 200 is only connected to the leg support mechanism 300, and the driving mechanism 200 is in a state of lack of support; or, the driving mechanism 200 is only connected to the leg support mechanism 300 by relatively thin transmission parts, resulting in unstable force transmission. When the driver 202 is offset, both of the above two situations are likely to cause the movement of each position of the driving structure to be out of sync and the torsion received by each position of the driving mechanism 200 to be unbalanced, causing the driving mechanism 200 to shake.

[0112] In addition, when the seat switches from the conventional sitting posture to the zero-gravity posture, the driving mechanism 200 drives a plurality of leg support mechanisms 300 to move, lifting the user's legs to a certain height. At this time, if the movement of each position of the driving mechanism 200 is out of sync and the torsion is unbalanced, it is easy to cause the torsion received by each leg support mechanism 300 to be unbalanced, further resulting in problems such as shaking of the leg support mechanism 300 and affecting the user's use experience.

[0113] As Figure 1As shown in the figure, the seat frame includes a movable base 100, a driving mechanism 200, and a leg support mechanism 300. Among them, during the process of switching between the normal sitting position and the zero-gravity posture, the driving mechanism 200 can always be stably supported, avoiding the situation where the movements of different positions of the driving mechanism 200 are asynchronous. The driving mechanism 200 includes a rotating member 201 and a driver 202. When the driving mechanism 200 is stably supported, the driver 202 can be set at any position of the rotating member 201 to ensure the torque balance at all parts of the rotating member 201.

[0114] At the same time, the rotating member 201 in the driving mechanism 200 is fixedly connected to the corresponding components in several leg support mechanisms 300, so as to directly drive the movements of the respective leg support mechanisms 300, without indirectly driving the movements of the leg support mechanisms 300 through additional transmission parts. Therefore, when the driving mechanism 200 is stably supported, the seat frame of the present application can prevent the movements of the respective leg support mechanisms 300 from being asynchronous, ensure the torque balance of the respective leg support mechanisms 300, and further avoid abnormal phenomena such as jitter of the leg support mechanisms 300.

[0115] As Figure 2 and Figure 3 shown, in some examples, the movable base 100 adopts a hollow frame structure and is used to install the seat cushion 701. The movable base 100 includes two side frames 101 and two cross beams. The side frames 101, one of the cross beams 103, and the other cross beam 102 all adopt rod-shaped structures. There are two side frames 101, and the side frames 101 are located on opposite sides in the movable base 100. One of the cross beams 103 and the other cross beam 102 are connected between the two side frames 101, and the other cross beam 102 is located away from the leg support mechanism 300 in the movable base 100.

[0116] The rotating member 201 adopts a rod-shaped structure. Among them, the materials of the movable base 100 and the rotating member 201 need to have a certain strength to avoid abnormal movements such as bending and torsion of the rotating member 201 during the movement process, and further ensure the torque balance at all parts of the rotating member 201 during the rotation process.

[0117] Specifically, the rotating member 201 is formed as a rotating rod and is located between the two side frames 101. The two ends of the rotating member 201 are respectively rotatably connected to the two side frames 101. It should be noted that the rotational connection between the rotating member 201 and the side frame 101 does not affect the supporting effect of the side frame 101 on the rotating member 201. Among them, the extending directions of the two side frames 101 are parallel to each other, and the extending directions of the other cross beam 102 and the rotating member 201 are perpendicular to the side frames 101. Therefore, the other cross beam 102, the two side frames 101, and the rotating member 201 form a closed rectangular structure.

[0118] Meanwhile, the leg support mechanism 300 includes a leg telescopic assembly 301. It can be understood that, to ensure that the user's legs can be evenly supported, two leg support mechanisms 300 are provided. Moreover, the two leg support mechanisms 300 are respectively located on opposite sides of the movable base 100.

[0119] In addition, the two leg support mechanisms 300 are both fixedly connected to the rotating member 201 and form an integral whole that moves together with the rotating member 201. Meanwhile, the leg telescopic assembly 301 is formed as a linkage mechanism. The rotating member 201 drives the leg telescopic assembly 301 to rotate through rotation, thereby driving the leg telescopic assembly 301 to extend or contract.

[0120] During the movement of the leg telescopic assembly 301, it can contract to the bottom of the movable base 100 and can also extend to the outside of the movable base 100. It can be understood that when the leg telescopic assembly 301 contracts to the bottom of the movable base 100, the seat frame of the present application adapts to the user's normal sitting posture; when the leg telescopic assembly 301 extends to the outside of the movable base 100, the seat frame of the present application adapts to the user's zero-gravity posture.

[0121] Specifically, one of the cross beams 103 is provided on the outside of the rotating member 201. One of the cross beams 103 is connected to each side frame 101 and extends to the top of the rotating member 201. On the one hand, one of the cross beams 103 can protect the rotating member 201; on the other hand, one of the cross beams 103 can prevent the rotating member 201 from contacting the seat cushion 701 on the top of the movable base 100, prevent the seat cushion 701 from interfering with the rotation of the rotating member 201, and also prevent the rotating member 201 from wearing the seat cushion, thereby improving the user's experience.

[0122] Such as Figure 4 、 Figure 5 and Figure 6 As shown, one of the cross beams 103 can be formed by bending a plate. The connecting protrusion 1034 is located on the plate surface of one of the cross beams 103 and forms a raised structure. Therefore, the cross-sectional area of the position of one of the cross beams 103 where the connecting protrusion 1034 is provided increases. When one of the cross beams 103 contacts the side frame 101 at the position where the connecting protrusion 1034 is provided, the contact area between one of the cross beams 103 and the side frame 101 increases, which is convenient for maintaining the connection stability between one of the cross beams 103 and the side frame 101.

[0123] In some examples, the covering portion 1032 is located on the top of the rotating member 201 and is used to isolate the rotating member 201 and the seat cushion 701.

[0124] In some examples, the crossbeam 103 further includes an extension portion 1033. The extension portion 1033 is also angled with respect to the covering portion 1032, and the extension portion 1033 and the avoidance portion 1031 are connected to opposite sides of the covering portion 1032, that is, on opposite sides of the rotating member 201. Then, the crossbeam 103 forms a semi-surrounding structure at the top of the rotating member 201.

[0125] In some examples, one of the crossbeams 103 is welded to the side frame 101. It can be understood that when the crossbeam 103 is welded to the side frame 101 through the connecting protrusion 1034, the welding area between one of the crossbeams 103 and the side frame 101 can be increased, ensuring a stable connection between one of the crossbeams 103 and the side frame 101.

[0126] In some examples, the seat cushion 701 is provided on the top of the movable base 100. To ensure the comfort of the user when sitting, the movable base 100 includes an elastic member. The elastic member is located at the bottom of the seat cushion 701, providing an elastic touch for the user. Specifically, the elastic member is a serpentine spring.

[0127] It should be noted that in the avoidance portion 1031, the position where the serpentine spring is connected is the directly stressed position and also the weakest position of the structure. The ear 10311 can increase the thickness of this position to a certain extent, thereby enhancing the deformation resistance ability of the avoidance portion 1031, and further enhancing the deformation resistance ability of the crossbeam 103.

[0128] In some examples, the height of the ear 10311 is lower than the height of the hook 1021. After the serpentine spring is installed, the height of the position where the serpentine spring is connected to the crossbeam 103 is lower than the height of the position where the serpentine spring is connected to the crossbeam 102, so that the elastic force direction applied by the middle part of the serpentine spring to the seat cushion 701 is biased towards the front part of the seat frame.

[0129] Specifically, the front part of the seat frame is the position where the leg support mechanism 300 is provided on the seat frame. When the user uses it, the user also performs a standing-up action at the front part of the seat frame. Therefore, the position setting of the ear 10311 and the hook 1021 in the height direction can assist the user in standing up.

[0130] Such as Figure 7 、 Figure 8 and Figure 9 As shown, in some examples, a buffer structure 104 is provided inside the crossbeam 103. The buffer structure 104 is provided on the crossbeam 103 and is located between the crossbeam 103 and the rotating member 201. When an object in the external environment collides with the crossbeam 103, the buffer structure 104 can relieve the impact force and prevent the crossbeam 103 from being dented towards the rotating member 201.

[0131] The buffer structure 104 is provided with a mating arc surface 1041, the mating arc surface 1041 matches the shape of the rotating member 201, and the buffer structure 104 contacts the rotating member 201 through the mating arc surface 1041.

[0132] In some examples, the drive mechanism 200 includes a driver 202, and the driver 202 can output linear motion. Specifically, the driver 202 can adopt structural forms such as an electric push rod, a cylinder, a hydraulic cylinder, etc.

[0133] Among them, the driver 202 has a certain length, the fixed end of the driver 202 is hinged to another cross beam 102, and the output end of the driver 202 is hinged to the side wall of the rotating member 201. Alternatively, the output end of the driver 202 is hinged to another cross beam 102, and the fixed end of the driver 202 is hinged to the side wall of the rotating member 201.

[0134] Furthermore, the drive mechanism 200 further includes a driver mounting member 203, the driver mounting member 203 is fixedly arranged on the side wall of the rotating member 201 and extends a certain distance outward from the rotating member 201.

[0135] Specifically, the driver mounting member 203 adopts a rod-shaped structure and is provided with a hinge hole and a hinge shaft for hinging the driver 202, and the driver mounting member 203 is hinged to the driver 202 through the hinge hole and the hinge shaft.

[0136] It can be understood that the driver mounting member 203 is used to receive the driving force transmitted by the driver 202 and serves as the lever arm for the rotation of the rotating member 201, so as to convert the thrust output by the driver 202 into the torque for the rotation of the rotating member 201.

[0137] When the length of the driver 202 increases, the driver 202 pushes the driver mounting member 203 to rotate in the direction close to the leg support mechanism 300, thereby driving the rotating member 201 to rotate. The rotating member 201 drives the leg telescopic assembly 301 to gradually extend to the outside of the movable base 100, so that the user gradually assumes a weightless posture.

[0138] When the length of the driver 202 decreases, the driver 202 pulls the driver mounting member 203 to rotate in the direction away from the leg support mechanism 300, thereby driving the rotating member 201 to rotate. The rotating member 201 drives the leg telescopic assembly 301 to gradually contract to the bottom of the movable base 100, so that the user gradually assumes a normal sitting posture.

[0139] In some examples, in currently existing seating furniture, the driver in the seating furniture is connected to the symmetric center position of the drive mechanism to ensure the balanced torque transmitted at both ends of the drive mechanism. However, the driver 202 at the symmetric center of the drive mechanism is also located in the middle of the movable base 100, and at the same time, a seat cushion 701 for carrying the user's buttocks is placed on the movable base 100. Under the action of the user's gravity, the serpentine spring in the seat cushion will inevitably show obvious depression, and the depression in the middle of the serpentine spring is the most obvious, which easily leads to the situation where the serpentine spring contacts the driver 202, affecting the user's sitting feeling.

[0140] Since the rotating member 201 of the present application is always firmly supported on the movable base 100, connecting the driver 202 to any position on the side wall of the rotating member 201 can ensure the balanced torque at both ends of the rotating member 201, avoid the jitter of the rotating member 201, and improve the user's experience.

[0141] Optionally, since the installation position of the driver 202 of the present application can be arbitrarily selected, it can be set at a position close to the side frame 101 to prevent the sunken serpentine spring in the seat cushion from contacting the driver 202, thereby further improving the user's experience.

[0142] As Figure 13 shown, in some examples, a first jack 2011 is provided at the end of the rotating member 201, and the extending direction of the first jack 2011 is the axial direction of the rotating member 201. At the same time, a first support pillar is provided on the side of the side frame 101 facing the rotating member 201, and the extending direction of the first support pillar 1011 is also the axial direction of the rotating member 201. It can be understood that the shape of the first jack 2011 matches the shape of the first support pillar 1011 to facilitate the insertion of the first support pillar 1011. When the first support pillar 1011 is inserted into the first jack 2011, the rotating member 201 is rotationally connected to the side frame 101, and the first support pillar 1011 can provide support for the rotating member 201.

[0143] It can be understood that first jacks 2011 are provided at both ends of the rotating member 201, and first support pillars 1011 are provided on both side frames 101 to ensure that both ends of the rotating member 201 are rotatably supported on the movable base 100 in a plug-in manner.

[0144] Specifically, the rotating member 201 includes a connecting rod, a first support pillar 1011, and a driver mounting member 203. The first jack 2011 is provided on the connecting rod, and the first support pillar 1011 is threadedly connected to the first jack 2011. When the first support pillar 1011 is threadedly connected to the first jack 2011, the first support pillar 1011 can rotate relative to the fixed base 400, as Figure 11As shown. This structure ensures that the rotating component 201 is detachable and replaceable. This structure makes the first support pillar 1011 the vulnerable part of rotation and the fixed base 400 the direct load-bearing part of rotation. The fixed base 400 as the direct load-bearing part of rotation can increase the anti-deformation ability at the load-bearing part.

[0145] In addition, a gasket 204 is sleeved on the first support pillar 1011. The gasket 204 is located between the first support pillar 1011 and the end of the rotating component 201 to prevent friction between the side frame 101 and the end of the rotating component 201.

[0146] In some examples, according to the stroke of the driver 202, the position where the rotating component 201 is rotatably connected to the side frame 101 is close to the end of the side frame 101, that is, the rotating component 201 is at the edge position of the movable base 100, so as to meet the installation space requirements of the driver 202.

[0147] In some examples, the leg support mechanism 300 further includes a drive rod 302, and the drive rod 302 is used to drive the leg telescopic assembly 301 in the leg support mechanism 300 to perform telescopic movement.

[0148] Among them, the drive rod 302 is fixedly connected to the rotating component 201. Since two leg support mechanisms 300 need to be provided, corresponding to the user's left leg and right leg respectively, two drive rods 302 are also provided accordingly. Specifically, the two drive rods 302 are respectively located at both ends of the rotating component 201.

[0149] When the driver 202 drives the rotating component 201 to rotate, since the drive rod 302 is fixedly connected to the rotating component 201, the drive rod 302 also rotates by the same amplitude, and then drives the leg telescopic assemblies 301 in the two leg support mechanisms 300 to perform telescopic movement.

[0150] As Figure 14 and Figure 15 shown, in some examples, the leg telescopic assembly 301 includes a first telescopic unit. On the one hand, the first telescopic unit is hinged to the drive rod 302, and on the other hand, the first telescopic unit is hinged to the movable base 100. The rotation of the drive rod 302 can drive the first telescopic unit to perform the first-stage telescopic process of the leg telescopic assembly 301.

[0151] 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.

[0152] Among them, 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 hinged position of the first end of the first leg link 303 and the position of the rotating member 201.

[0153] 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 member 306. At the same time, the second leg link 304 is also hinged to the drive rod 302, so that the side frame 101, the first leg link 303, the second leg link 304 and the drive rod 302 form a closed four-bar mechanism, which is beneficial to ensuring the stability of the telescopic movement of the first telescopic unit.

[0154] 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 member 306, that is, both the second leg link 304 and the third leg link 305 are hinged to the leg link mounting member 306, so that the drive rod 302, the second leg link 304, the third leg link 305 and the leg link mounting member 306 form a closed four-bar mechanism, further ensuring the stability of the telescopic movement of the first telescopic unit.

[0155] In some examples, the leg telescopic assembly further includes a second telescopic unit. On the one hand, the second telescopic unit is hinged to the leg link mounting member 306, and on the other hand, the second telescopic unit is hinged to the third leg link 305. When the drive rod 302 drives the first telescopic unit to perform a telescopic process, the first telescopic unit further drives the second telescopic unit to perform a telescopic process, thereby realizing the second-stage telescopic process of the leg telescopic assembly 301.

[0156] 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 member 306, forming a structural connection between the second telescopic unit and the first telescopic unit. The second end of the fourth leg link 307 is hinged to the fifth leg link 308.

[0157] At the same time, 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, and the fifth leg link 308 is also hinged to the fourth leg link 307.

[0158] Specifically, the driving rod 302 and the fifth leg link 308 are hinged to both ends of the third leg link 305, and the leg link mounting member 306 is hinged to the middle of the third leg link 305, facilitating the third leg link 305 to apply a driving force to the fifth leg link 308 during rotation.

[0159] In some examples, the leg link mounting member 306 is generally triangular in structure, and the hinged positions of the second leg link 304, the third leg link 305, and the fourth leg link 307 on the leg link mounting member 306 are respectively close to three angled positions of the leg link mounting member 306, ensuring that the hinged positions of the second leg link 304, the third leg link 305, and the fourth leg link 307 on the leg link mounting member 306 are separated from each other, facilitating the second leg link 304, the third leg link 305, the driving rod 302, and the leg link mounting member 306 to form a four-bar mechanism, and also facilitating the third leg link 305, the fourth leg link 307, the fifth leg link 308, and the leg link mounting member 306 to form a four-bar mechanism.

[0160] In addition, the fifth leg link 308 extends away from the seat frame to support the user's calf.

[0161] 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 is within the range of the fixed base 400 through sliding, the user on the movable base 100 is in a conventional sitting position; 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 zero-gravity sitting position.

[0162] Furthermore, the drive mechanism 200 includes a rotating member 201 and a driver 202. The rotating member 201 is rotatably supported on the movable base 100. Since the movable base 100 is made of a high-strength material, when the rotating member 201 rotates, it can avoid the rotating member 201 from jittering and can also ensure uniform torsion at each position of the rotating member 201. One end of the driver 202 is hinged to the movable base 100, and the other end is hinged to the rotating member 201. Therefore, the driver 202 can drive the rotating member 201 to rotate by changing its length.

[0163] At the same time, the leg support mechanism 300 includes a driving rod 302 and a leg telescopic assembly 301, and the leg telescopic assembly 301 is hinged to the driving rod 302. Specifically, two leg support mechanisms 300 are provided, respectively on opposite sides of the movable base 100, corresponding to the user's legs.

[0164] The rotating member 201 and the driving rod 302 form an integral body, that is, a rotating assembly. The rotating assembly drives the leg telescopic assembly 301 to perform telescopic movement by rotation.

[0165] The driver 202 is arranged at any position of the rotating member 201, which can ensure the consistency of the movement of different positions of the rotating member 201, so as to ensure the torque balance of different positions of the rotating member 201 and avoid the shaking of the seat frame of the present application. Therefore, the driver 202 can be arranged at a position deviating from the center of the movable base 100. When the serpentine spring of the seat cushion on the top of the movable base 100 sags, the driver 202 at a position deviating from the center of the movable base 100 can avoid contacting the serpentine spring and improve the sitting feeling of the user.

[0166] It should be noted that the movement of the leg telescopic assembly 301 is interlocked with the movement of the movable base 100. When the movable base 100 slides within the range of the fixed base 400, the leg telescopic assembly 301 retracts to the bottom of the movable base 100, and the user on the movable base 100 is in a normal sitting position; when the movable base 100 slides out of the range of the fixed base 400, the leg telescopic assembly 301 extends to the outside of the movable base 100 to support the legs of the user, and the user on the movable base 100 is in a zero-gravity sitting position.

[0167] In some examples, the rotating member 201 is fixedly connected to the driving rod 302. The rotating member 201 is supported on the movable base 100 and is rotatably connected to the movable base 100. The driving rod 302 is hinged to the leg telescopic assembly 301, so as to drive the leg telescopic assembly 301 to contract or extend.

[0168] Specifically, the rotating member 201 and the movable base 100 can adopt an insertion connection method, which can provide sufficient support for the rotating member 201 by the movable base 100 on the premise of meeting the rotational connection between the rotating member 201 and the movable base 100.

[0169] In some examples, such as Figure 16 and Figure 17 shown, the seat frame includes a connection mechanism 500. On the one hand, the connection mechanism 500 connects the movable base 100. On the other hand, the connection mechanism 500 connects the rotating assembly. At the same time, the connection mechanism 500 also connects the fixed base 400. Specifically, the connection mechanism 500 connects the driving rod 302 in the leg support mechanism 300. Therefore, the movable base 100, the leg support mechanism 300 and the fixed base 400 are connected to each other through the connection mechanism 500 to ensure the interlocking of the telescopic movement of the leg support mechanism 300 and the sliding of the movable base 100.

[0170] Among them, the connecting mechanism 500 is hinged to the driving rod 302 of the rotating assembly, and is also hinged to the fixed base 400, and the connecting mechanism 500 is rotatably connected to the movable base 100. When the rotating member 201 drives the driving rod 302 to rotate, the driving rod 302 drives the leg support mechanism 300 to perform telescopic movement. At the same time, the driving rod 302 transmits the force to the connecting mechanism 500, and then the connecting mechanism 500 transmits the force to the fixed base 400, and the fixed base 400 pushes the movable base 100 through the reaction force, so that the movable base 100 slides relative to the fixed base 400.

[0171] In some examples, such as Figure 17 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, and the first link 501, the second link 502 and the third link 503 are hinged in sequence.

[0172] Among them, the first link 501 is hinged to the driving rod 302, and the third link 503 is hinged to the fixed base 400. The second link 502 includes a first hinge portion 5021, a second hinge portion 5022 and a rotating connection portion 5023. The first link 501 is hinged to the second link 502 through the first hinge portion 5021, and the third link 503 is hinged to the second link 502 through the second hinge portion 5022. At the same time, the second link 502 is rotatably connected to the movable base 100 through the rotating connection portion 5023.

[0173] It can be understood that the second link 502 provides a thrust force for the movable base 100, so as to drive the movable base 100 to slide.

[0174] In some examples, to ensure that the thrust direction received by the movable base 100 matches the movement direction of the movable base 100 and 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 portion 5023 and the first hinge portion 5021 to the distance between the rotating connection portion 5023 and the second hinge portion 5022 is 1:1 to 1:3.

[0175] In some examples, such as Figure 1 As shown, the seat frame includes a back support mechanism 600, and the back support mechanism 600 is also formed as a linkage mechanism. On the one hand, the back support mechanism 600 is hinged to the fixed base 400; on the other hand, the back support mechanism 600 is hinged to the movable base 100, and the lengths of the links in the linkage mechanism are such that the back support mechanism 600 protrudes from the fixed base 400. The back support mechanism 600 is used to install a backrest, and the back support mechanism 600 supports the user's back through the backrest.

[0176] Among them, the movable base 100 drives the angular change of the backrest support mechanism 600 by sliding relative to the fixed base 400. When the movable base 100 gradually moves out of the range of the fixed base 400, the angle between the structure of the backrest support mechanism 600 for installing the backrest and the horizontal plane gradually decreases, enabling the user to gradually enter a zero-gravity posture. When the movable base 100 gradually moves into the range of the fixed base 400, the angle between the structure of the backrest support mechanism 600 for installing the backrest and the horizontal plane gradually increases, enabling the user to gradually enter a conventional sitting posture.

[0177] It can be understood that the angular adjustment process of the backrest support mechanism 600, the sliding process of the movable base 100, and the telescopic process of the leg support mechanism 300 are interlinked with each other, enabling the user to freely switch between the zero-gravity posture and the conventional sitting posture.

[0178] It should be noted that when the angle between the structure of the backrest support mechanism 600 for installing the backrest and the horizontal plane is the largest, the backrest support mechanism 600 is in the limit position. At this time, the backrest support mechanism 600 is within the range of the fixed base 400. When the angle between the connecting rod of the backrest support mechanism 600 for installing the backrest and the horizontal plane decreases, the overall movement direction of the backrest support mechanism 600 is towards the movable base 100 and will not exceed the range of the fixed base 400.

[0179] Therefore, when the fixed base 400 is set against the wall, the backrest support mechanism 600 will not interfere with the wall during the movement process, that is, the seat frame of the present application can achieve "zero wall contact".

[0180] In some examples, as Figure 18 and Figure 19 shown, the backrest support mechanism 600 includes a first back link 601, a second back link 602, a third back link 603, and a back link mounting member 604.

[0181] Furthermore, in the height direction, the hinge position of the first end of the first back link 601 is higher 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 compared to the hinge position of the first end of the first back link 601.

[0182] At the same time, there is a certain interval 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.

[0183] Therefore, the first back link 601, the fixed base 400, the second back link 602, and the back link mounting member 604 form a four-bar mechanism. When the first back link 601 rotates relative to the fixed base 400, restricted by the four-bar mechanism, the angle of the second back link 602 relative to the fixed base 400 also changes accordingly. Due to the different hinge positions of the first ends of the first back link 601 and the second back link 602, there are also directional differences in the forces exerted by the first back link 601 and the second inner link 602 on the back link mounting member 604 during rotation, thereby driving the back link mounting member 604 to rotate.

[0184] In addition, 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. Then, the first back link 601, the fixed base 400, the second back link 602, and the back link mounting member 604 can 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 translation and rotation. The third back link 603 then transmits the force to the first back link 601, thereby applying a driving force to the first back link 601 to make the first back link 601 rotate.

[0185] In some examples, the back link mounting member 604 is fixedly connected with a backrest mounting plate 605, and the backrest mounting plate 605 is used to mount the backrest. When the first back link 601, the second back link 602, and the third back link 603 perform coordinated motion, the back link mounting member 604 will rotate, thereby driving the backrest mounting plate 605 to rotate. At this time, the angle of the backrest changes, so as to adapt to the user's normal sitting posture or zero-gravity posture.

[0186] In some examples, an extension portion 6011 is provided on the side edge of the first back link 601. The extension portion 6011 extends toward the side of the first back link 601 away from the movable base 100, and the second end of the third back link 603 is hinged to the extension portion 6011. It can be understood that the hinge position of the second end of the third back link 603 deviates from the line connecting the first end and the second end of the first back link 601, so as to ensure that the back link mounting member 604 can be at the required angle. It can be 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 also limit the rotation speed of the back link mounting member 604. The user can adaptively adjust the above variables according to actual needs, so as to ensure the rotation amplitude and rotation speed of the back link mounting member 604.

[0187] In some examples, when the user is in a zero-gravity posture, the angle between the user's back and thighs is between 121° and 135°. In the seat frame of the present application, a seat cushion is provided at the top of the movable base 100. The seat cushion defines the position of the user's thighs. The backrest link mounting member 604 is provided with a backrest mounting plate 605. The backrest mounting plate 605 is used to mount the backrest, and the backrest defines the position of the user's back. Therefore, when the user is in a zero-gravity 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°.

[0188] Specifically, when the user is in a zero-gravity posture, the angle between the movable base 100 and the backrest mounting plate 605 is between 121° and 135°. When the user is in a regular sitting posture, the angle between the movable base 100 and the backrest mounting plate 605 decreases.

[0189] In the embodiment of the present application, 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 backrest support mechanism 600 and is used to support the user's back. The backrest is detachably connected to the seat cushion; the leg rest is connected to the leg support mechanism 300 and is used to support the user's legs.

[0190] In some examples, the seat further includes a back panel. A back panel mounting structure 705 is provided at the rear side of the fixed base 400. The back panel mounting structure 705 can adopt an extension rod fixedly connected to the fixed base 400. The back panel is connected to the rear side of the seat through the back panel mounting structure 705, thereby shielding the internal structure of the seat and improving the aesthetic degree of the seat.

[0191] Specifically, the back panel is connected to the back panel mounting structure 705 by fasteners.

[0192] It should be noted that when the seat is in a zero-gravity posture, the gap between the inner plate and the backrest is greater than or equal to 10 cm to facilitate the maintenance of the internal structure of the seat.

[0193] During 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. The angle between the backrest mounting plate 605 in the backrest support mechanism 600 and the movable base 100 is the smallest, and the user is in a regular sitting posture. When the movable base 100 moves out of the range of the fixed base 400 and reaches the movement limit position, the leg support mechanism 300 extends to the outside of the movable base 100. The angle between the backrest mounting plate 605 in the backrest support mechanism 600 and the movable base 100 is the largest and is between 121° and 135°, and the user is in a zero-gravity sitting posture.

[0194] Meanwhile, the rotating member 201 is rotatably supported by the movable base 100, ensuring synchronous movement of all parts of the rotating member 201, avoiding jitter in the leg support mechanism 300, and also ensuring balanced torque of the two leg support mechanisms 300, thereby enhancing the user experience. At the same time, the driver 202 is disposed at a position close to the side frame 101, and the rotating member 201 is located at the edge of the movable base 100, preventing the serpentine spring that sags in the seat cushion from contacting the driver 202 and the rotating member 201, and improving the user's sitting feeling. Moreover, the back support mechanism 600 is always within the range of the fixed base 400, enabling the seat frame to be wall-free.

[0195] The embodiments of the present application have been described in detail above in conjunction with the accompanying drawings. However, the present application is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present application within the knowledge of those of ordinary skill in the art. In addition, the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

Claims

1. A seat frame, characterized in that: include: Activity base; A driving mechanism, the driving mechanism comprising a rotating component supported on the movable base, the rotating component being rotatably disposed on the movable base; A leg support mechanism, the leg support mechanism is fixedly connected to the rotating component, the leg support mechanism includes a leg telescopic assembly, and the rotating component drives the leg telescopic assembly to rotate by rotating to drive the leg telescopic assembly to extend or contract; Wherein, the rotating component is detachably arranged on the movable base.

2. The seat frame according to claim 1, characterized in that: The movable base includes side frames arranged on two opposite sides and a crossbeam arranged between the side frames. The crossbeam is provided with a connecting protrusion, and the crossbeam is connected to the side frames through the connecting protrusion.

3. The seat frame according to claim 2, characterized in that: The connecting protrusion comprises a straight portion and a bending portion connected with the straight portion, the bending portion is connected with the cross beam, and the straight portion and the bending portion are respectively connected with the side frame by welding.

4. The seat frame according to claim 1, characterized in that: The leg support mechanism is hinged to the movable base, the crossbeam comprises a covering portion and an avoiding portion, the avoiding portion is connected to the covering portion at an angle, and the avoiding portion is inclined to avoid the leg support mechanism.

5. The seat frame according to claim 1, characterized in that: The movable base includes side frames arranged on opposite sides and two cross beams arranged between the side frames, wherein one cross beam also includes a covering portion, an avoiding portion and an extending portion, the extending portion is connected to the covering portion at an angle, and the extending portion and the avoiding portion are located on opposite sides of the covering portion; The rotating component is rotatably arranged on the side frame, the covering portion covers the top of the rotating component, and the avoiding portion and the extending portion are located on two opposite sides of the rotating component.

6. The seat frame according to claim 5, characterized in that: A gasket is provided between the rotating component and the side frame; a first plug hole is provided at the end of the rotating component, and the side frame is provided with a first pillar inserted into the first plug hole; the gasket is sleeved on the first pillar and is located between the side frame and the rotating component.

7. The seat frame according to claim 5, characterized in that: The movable base includes an elastic component, the avoidance portion is provided with a hanging ear, the hollow part of the hanging ear defines a hanging channel, another crossbeam is provided with a hook, one end of the elastic component is hung on the hanging channel, and the other end of the elastic component is hung on the hook.

8. The seat frame according to claim 7, characterized in that: The height of the hanging channel is lower than the height of the hook.

9. The seat frame according to claim 5, characterized in that: A buffer structure is provided inside one of the crossbeams. The buffer structure is provided with a matching arc surface matching the shape of the rotating component. The buffer structure contacts the rotating component through the matching arc surface.

10. The seat frame according to claim 9, characterized in that: The avoidance portion is provided with a first card slot, the buffer structure is provided with a first clamping portion embedded in the first card slot, and the buffer structure and the avoidance portion are connected via the first clamping portion and the first card slot; And / or, the extension portion is provided with a second card slot, the buffer structure is provided with a second clamping portion embedded in the second card slot, and the buffer structure and the extension portion are connected via the second clamping portion and the second card slot.

11. The seat frame according to claim 2, characterized in that: The seat frame further comprises a fixed base, the movable base, the leg support mechanism and the fixed base are connected to each other via a connecting mechanism, the movable base is provided with an outer extension rod extending outward and an inner extension rod extending inward, and the inner extension rod is located above the connecting mechanism; Wherein, the connecting mechanism and / or the leg supporting mechanism are located below the connecting protrusion.

12. The seat frame according to claim 1, characterized in that: The seat frame further comprises a back support mechanism, which comprises a first back link, a second back link, a third back link and a back link mounting component, wherein a first end of the first back link is hinged to a fixed base, a second end of the first back link is hinged to the back link mounting component, a first end of the second back link is hinged to the fixed base, a second end of the second back link is hinged to the back link mounting component, a first end of the third back link is hinged to a movable base, and a second end of the third back link is hinged to the first back link; Wherein, the side edge of the first back connecting rod is provided with an extension portion, and the extension portion is provided with a limiting plate for abutting against the third back connecting rod.

13. A seat, characterized in that: It comprises a seat bag, a back cushion and a seat frame as described in any one of claims 1 to 12, wherein the seat bag is installed on the top of the movable base, and the back cushion is detachably connected to the seat bag.

14. The sitting device according to claim 13, characterized in that: The seat bag and the backrest bag are connected by a zipper.

15. The sitting device according to claim 14, characterized in that: The seat bag is provided with a first flexible extension section, the backrest bag is provided with a second flexible extension section, and the zipper is arranged between the first flexible extension section and the second flexible extension section.

16. The sitting device according to claim 13, characterized in that: The seat also includes a backboard, which is detachably arranged on a fixed base. When the seat is in a weightless posture, a gap between the backboard and the backrest is greater than or equal to 10 cm.

17. The sitting device according to claim 13, characterized in that: The rotating component is connected to the movable base via screws.

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