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] The present application relates to the technical field of furniture, in particular to a seat frame and a seat. BACKGROUND

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

[0003] In order to ensure the stability of the seat frame structure in the seat, the seat frame is provided with a cross beam. However, the connection strength between the cross beam and other structures of the seat frame is low, which makes it difficult to ensure the stability of the position of the cross beam. At the same time, the cross beam is also easy to interfere with the transmission structure in the seat frame, which affects the movement of the backrest, seat cushion and leg support. CONTENT OF THE INVENTION

[0004] The present application aims to solve at least one of the technical problems existing in the prior art. To this end, the present application proposes a seat frame, and the present application also proposes a seat with the above-mentioned seat frame.

[0005] The seat frame according to the first aspect of the present application comprises:

[0006] a movable base;

[0007] a driving mechanism, the driving mechanism comprising a rotating part supported on the movable base, the rotating part being rotatably arranged on the movable base;

[0008] a leg support mechanism, the leg support mechanism being fixedly connected to the rotating part, the leg support mechanism comprising a leg stretching assembly, the rotating part driving the leg stretching assembly to stretch or contract by rotating;

[0009] wherein the rotating part is detachably arranged on the movable base.

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

[0011] The movable base comprises side frames arranged on opposite sides and a cross beam arranged between each of the side frames, the cross beam being provided with a connecting protrusion, and the cross beam being connected to the side frames through the connecting protrusion.

[0012] According to the chair frame provided by the embodiment of the present application, the crossbeam of the movable base is provided with a connecting protrusion, thereby increasing the contact area between the crossbeam and the side frame and improving the connection stability of the crossbeam; the crossbeam comprises an inclined avoiding portion for avoiding the connecting rod of the leg supporting mechanism, thereby avoiding the interference between the leg supporting mechanism and the crossbeam during rotation and ensuring the movement process of the leg supporting mechanism.

[0013] According to some embodiments of the present application, the connecting protrusion is arranged on the avoiding portion, the connecting protrusion comprises a straight portion and a bending portion connected with the straight portion, the bending portion is connected with the avoiding portion, and the straight portion and the bending portion are integrally connected with the side frame by welding.

[0014] The leg supporting mechanism is hinged to the movable base, the crossbeam comprises a covering portion and an avoiding portion, the avoiding portion is connected with the covering portion at an angle, and the avoiding portion is arranged in an inclined manner to avoid the leg supporting mechanism.

[0015] According to some embodiments of the present application, the movable base comprises side frames arranged on opposite sides and two crossbeams arranged between the side frames, one of the crossbeams further comprises a covering portion, an avoiding portion and an extending portion, the extending portion is connected with the covering portion at an angle, and the extending portion and the avoiding portion are arranged on opposite sides of the covering portion.

[0016] 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 arranged on opposite sides of the rotating component.

[0017] According to some embodiments of the present application, a gasket is arranged between the rotating component and the side frame, an end of the rotating component is provided with a first socket, the side frame is provided with a first support inserted into the first socket, and the gasket is sleeved on the first support and arranged between the side frame and the rotating component.

[0018] According to some embodiments of the present application, the movable base comprises an elastic component, the avoiding portion is provided with a hanging ear, the hollow portion of the hanging ear defines the hanging channel, another crossbeam is provided with a hook, one end of the elastic component is hung in the hanging channel, and the other end of the elastic component 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, the inside of one of the crossbeams is provided with a buffer structure, the buffer structure is provided with a matching arc surface matched with the shape of the rotating component, and the buffer structure contacts the rotating component through the matching arc surface.

[0021] According to some embodiments of the present application, the avoiding part is provided with a first clamping groove, and the buffer structure is provided with a first clamping part embedded in the first clamping groove, and the buffer structure and the avoiding part are connected through the first clamping part and the first clamping groove.

[0022] According to some embodiments of the present application, the extending part is provided with a second clamping groove, and the buffer structure is provided with a second clamping part embedded in the second clamping groove, and the buffer structure and the extending part are connected through the second clamping part and the second clamping groove.

[0023] According to some embodiments of the present application, the seat frame further comprises a fixed base, and the movable base, the leg supporting mechanism and the fixed base are connected to each other through a connecting mechanism, the movable base is provided with an outward extending outer extending rod and an inward extending inner extending rod, and the inner extending rod is located above the connecting mechanism.

[0024] The connecting mechanism and / or the leg supporting mechanism are located below the connecting protrusion.

[0025] According to some embodiments of the present application, the seat frame further comprises a back supporting mechanism, the back supporting mechanism comprises a first back connecting rod, a second back connecting rod, a third back connecting rod and a back connecting rod mounting part, a first end of the first back connecting rod is hinged to the fixed base, a second end of the first back connecting rod is hinged to the back connecting rod mounting part, a first end of the second back connecting rod is hinged to the fixed base, a second end of the second back connecting rod is hinged to the back connecting rod mounting part, a first end of the third back connecting rod is hinged to the movable base, and a second end of the third back connecting rod is hinged to the first back connecting rod.

[0026] The side edge of the first back connecting rod is provided with an outward extending part, and a limiting plate for abutting against the third back connecting rod is arranged on the outward extending part.

[0027] According to the second aspect of the embodiments of the present application, the seat comprises a seat cover, a back cover and the above-mentioned seat frame, the seat cover is mounted on the top of the movable base, and the back cover is detachably connected to the seat cover.

[0028] The seat frame further comprises a back supporting mechanism, the back supporting mechanism comprises a first back connecting rod, a second back connecting rod, a third back connecting rod and a back connecting rod mounting part, a first end of the first back connecting rod is hinged to the fixed base, a second end of the first back connecting rod is hinged to the back connecting rod mounting part, a first end of the second back connecting rod is hinged to the fixed base, a second end of the second back connecting rod is hinged to the back connecting rod mounting part, a first end of the third back connecting rod is hinged to the movable base, and a second end of the third back connecting rod is hinged to the first back connecting rod.

[0029] The side edge of the first back connecting rod is provided with an outward extending part, and a limiting plate for abutting against the third back connecting rod is arranged on the outward extending part.

[0030] The seating according to the embodiments of this application has at least the following beneficial effects: the seat frame of the first aspect embodiment of this application includes a movable base and a leg support mechanism. The crossbeam of the movable base is provided with a connecting protrusion, thereby increasing the contact area between the crossbeam and the side frame and improving the connection stability of the crossbeam. The crossbeam includes an inclined avoidance part to avoid the connecting rod of the leg support mechanism, thereby preventing the leg support mechanism from interfering with the crossbeam during rotation and ensuring the movement process of the leg support mechanism.

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

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

[0033] According to some embodiments of this application, the seat also includes a back panel, which is detachably mounted on a fixed base, and the gap between the back panel and the backrest is greater than or equal to 10 cm when the seat is in a weightless posture.

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

[0035] 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

[0036] 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.

[0037] Figure 1 This is a schematic diagram of the seat frame in a conventional sitting posture according to an embodiment of this application;

[0038] Figure 2 This is a schematic diagram of the seat frame of this application with the crossbeam removed in a normal sitting posture;

[0039] Figure 3 This is a schematic diagram of the seat frame in an embodiment of this application with the crossbeam removed in a zero-gravity state;

[0040] Figure 4 This is a schematic diagram of the seat frame structure according to an embodiment of this application;

[0041] Figure 5 This is a cross-sectional view of the position where the crossbeam of the seat frame in the embodiment of this application has a connecting protrusion;

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

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

[0044] Figure 8 is a structural schematic view of the buffer structure of the seat frame of the embodiment of the present application

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

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

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

[0048] Figure 12 is a schematic view of the crossbeam of the seat frame of the embodiment of the present application being mounted on a movable base

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

[0050] Figure 14 is a structural schematic view of the leg support mechanism of the seat frame of the embodiment of the present application

[0051] Figure 15 is a structural schematic view of the leg support mechanism of the seat frame of the embodiment of the present application

[0052] Figure 16 is a schematic view of the connection mechanism of the seat frame of the embodiment of the present application being mounted on the seat frame

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

[0054] Figure 18 is a structural schematic view of the back support mechanism of the seat frame of the embodiment of the present application

[0055] Figure 19 is a structural schematic view of the back support mechanism of the seat frame of the embodiment of the present application

[0056] Figure 20 is a structural schematic view of the seat of the embodiment of the present application

[0057] Figure 21 is a schematic view of the connection of the backrest bag and the seat bag of the seat of the embodiment of the present application

[0058] ​​Figure 22 is a chair of an embodiment of the present application Figure 21 is a local enlarged view of part C in figure 1.

[0059] Reference signs:

[0060] Movable base 100; side frame 101; first support column 1011; second support column 1012; another cross beam 103; hook 1021; one of the cross beams 102; avoiding part 1031; hanging ear 10311; hanging connection channel 103111; first clamping groove 10312; covering part 1032; extension part 1033; second clamping groove 10331; connecting protrusion 1034; straight part 10341; bending part 10342; buffer structure 104; matching curved surface 1041; first clamping part 1042; second clamping part 1043; gap 1044;

[0061] Driving mechanism 200; rotating part 201; first insertion hole 2011; second support column 2012; driver 202; driver mounting part 203; gasket 204;

[0062] Leg support mechanism 300; leg telescopic assembly 301; driving rod 302; first leg connecting rod 303; second leg connecting rod 304; third leg connecting rod 305; leg connecting rod mounting part 306; fourth leg connecting rod 307; fifth leg connecting rod 308;

[0063] Fixed base 400;

[0064] Connecting mechanism 500; first connecting rod 501; second connecting rod 502; first hinge part 5021; second hinge part 5022; rotating connection part 5023; third connecting rod 503;

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

[0066] Seat bag 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 DESCRIPTION

[0067] The embodiments of the present application are described in detail below with reference to the accompanying drawings, wherein the same or similar notations represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by reference to the drawings are exemplary only, and are used only for explaining the present application, and cannot be understood as a limitation of the present application.

[0068] In the description of the application, it needs to be understood that if the terms "center", "middle", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the application.

[0069] In the description of the application, if several meanings are one or more, the meaning of multiple is two or more, greater than, less than, more than, etc. are understood as not including the number, above, below, within, etc. are understood as including the number. If it is described that the first, second is only used for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or the sequence of indicated technical features.

[0070] In the description of the application, unless otherwise explicitly specified and limited, the terms "set", "mount", "connected", "connected" should be understood broadly, for example: it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the communication between two elements. For those skilled in the art, the specific meaning of the above terms in the application can be understood according to the specific circumstances.

[0071] In the description of the application, if the description of the terms "one embodiment", "some embodiments", "one example", "some examples", "some embodiments", "illustrative embodiments", "example", "specific example", "some examples" and the like means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the application. In the description, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

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

[0073] a movable base 100;

[0074] A driving mechanism 200 is arranged on the movable base 100, and the driving mechanism 200 comprises a rotating part 201 rotatably arranged on the movable base 100.

[0075] A leg supporting mechanism 300 is fixedly connected to the rotating part 201, and the leg supporting mechanism 300 comprises a leg telescopic assembly 301, and the rotating part 201 drives the leg telescopic assembly 301 to rotate to drive the leg telescopic assembly 301 to extend or contract.

[0076] The rotating part 201 is detachably arranged on the movable base 100.

[0077] The rotating part 201 is rotatably arranged on the movable base 100 to increase the deformation resistance of the movable base 100, and the rotating part 201 is detachably arranged on the movable base 100 to simplify the installation difficulty of the rotating part 201 and facilitate replacement of the deformed rotating part 201.

[0078] As shown in Figure 4 , Figure 5 and Figure 6 , the movable base 100 comprises 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 the connecting protrusion 1034, so as to increase the contact area between the 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 the connecting protrusion 1034, so as to increase the contact area between the one of the cross beams 103 and the side frame 101 and improve the connection stability of the one of the cross beams 103.

[0080] The one of the cross beams 103 can avoid the movement path of the leg supporting mechanism 300 to avoid interference between the leg supporting mechanism 300 and the one of the cross beams 103 during movement, so that the seat frame can smoothly change posture; the one of the cross beams 103 comprises an inclined avoiding part 1031 to avoid the connecting rod of the leg supporting mechanism 300, so as to avoid interference between the leg supporting mechanism 300 and the one of the cross beams 103 during rotation and ensure the movement process of the leg supporting mechanism 300.

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

[0082] The leg supporting mechanism 300 is hinged to the movable base 100, one of the cross beams 103 comprises a covering portion 1032 and an avoiding portion 1031, the avoiding portion 1031 is connected with the covering portion 1032 at an angle, and the avoiding portion 1031 is arranged obliquely to avoid the leg supporting mechanism 300.

[0083] The avoiding portion 1031 is arranged obliquely, which has the following advantages: 1. The avoiding portion 1031 provides more installation space for the buffer structure 104; 2. After the buffer structure 104 is impacted, the oblique arrangement of the avoiding portion 1031 can unload part of the impact force transmitted by the buffer structure 104; 3. The oblique arrangement of the avoiding portion 1031 facilitates the stamping forming of the hanging ear 10311.

[0084] The movable base 100 comprises the side frames 101 arranged on opposite sides and the two cross beams arranged between the side frames 101, one of the cross beams 103 further comprises the covering portion 1032, the avoiding portion 1031 and the extending portion 1033, the extending portion 1033 is connected with the covering portion 1032 at an angle, and the extending portion 1033 and the avoiding portion 1031 are located on opposite sides of the covering portion 1032.

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

[0086] As shown in Figure 10 , Figure 11 and Figure 13 , the gasket 204 is arranged between the rotating component 201 and the side frame 101; the end of the rotating component 201 is provided with a first insertion hole 2011, the side frame 101 is provided with a first support 1011 inserted into the first insertion hole 2011, and the gasket 204 is sleeved on the first support 1011 and located between the side frame 101 and the rotating component 201.

[0087] The gasket 204 is made of non-metal, which is used to avoid direct friction between the rotating component 201 and the side frame 101 when the gasket 204 is located between the side frame 101 and the rotating component 201; the rotating component 201 is made of metal, and the side frame 101 is made of metal.

[0088] As shown in Figure 4 and Figure 7 , the movable base 100 comprises a resilient component, the avoiding part 1031 is provided with a hanging ear 10311, the hollow part of the hanging ear 10311 defines a hanging channel 103111, the other beam 102 is provided with a hook 1021, one end of the resilient component is hung in the hanging channel 103111, and the other end of the resilient component is hung in the hook 1021.

[0089] The hanging channel 103111 allows the hanging ear 10311 to connect the resilient component without dead angle in the circumferential direction, so that the resilient component is hung in the hanging channel 103111 first, and then the resilient component is hung in the hook 1021; this structure ensures the connection strength of the resilient component through the hanging ear 10311 first, and then reduces the connection difficulty of the resilient component through the hook 1021.

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

[0091] As shown in Figure 7 , Figure 8 and Figure 9 , the inside of one of the beams 102 is provided with a buffer structure 104, the buffer structure 104 is provided with a matching arc surface 1041 matched with the shape of the rotating component 201, and the buffer structure 104 contacts the rotating component 201 through the matching arc surface 1041.

[0092] The buffer structure 104 is used to increase the deformation resistance of one of the beams 102; and the matching arc surface 1041 is used to increase the contact area between the buffer structure 104 and the rotating component 201. The rotating component 201 comprises a connecting rod and a driver mounting component 203, the connecting rod is detachably arranged on the movable base 100, and the connecting rod is connected with the movable base 100 through a screw.

[0093] As shown in Figure 12 , there is a gap 1044 between the buffer structure 104 and the rotating component 201, and the gap 1044 is used to reduce the rotation resistance of the rotating component 201 in the normal working process. 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 part of the impact force from the extension part 1033, so as to reduce the probability of deformation of the rotating component 201 after external impact.

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

[0096] As shown in Figure 1 and Figure 2 , the seat further comprises a fixed base 400, the movable base 100, the leg support mechanism 300 and the fixed base 400 are connected to each other through the connecting 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 connecting mechanism 500.

[0097] Among them, the connecting mechanism 500 and / or the leg support mechanism 300 are located below the connecting protrusion 1034.

[0098] As shown in Figure 2 , Figure 20 and Figure 21 , the seat bag 701 is hung on the outer extension rod 706, and when the seat bag 701 is hung on the outer extension rod 706, the bottom surface of the seat bag 701 abuts against the top surface of the inner extension rod 707; this structure limits the lowest position of the seat bag 701, so as to avoid the seat bag 701 from contacting the connecting mechanism 500, especially after the user sits on the seat bag 701, the seat bag 701 contacts the connecting mechanism 500.

[0099] The connecting protrusion 1034 protrudes upward, and when the connecting mechanism 500 and / or the leg support mechanism 300 are located below the connecting protrusion 1034, because the connecting protrusion 1034 protrudes upward, the movement space of the connecting mechanism 500 and the leg support mechanism 300 is further increased, so as to avoid the connecting mechanism 500 and / or the leg support mechanism 300 from interfering with one of the cross beams 102.

[0100] As shown in Figure 18 and Figure 19As shown, the seat frame further comprises a back support mechanism 600, the back support mechanism 600 comprising a first back link 601, a second back link 602, a third back link 603 and a back link mounting component 604, a first end of the first back link 601 being hinged to the fixed base 400, a second end of the first back link 601 being hinged to the back link mounting component 604, a first end of the second back link 602 being hinged to the fixed base 400, a second end of the second back link 602 being hinged to the back link mounting component 604, a first end of the third back link 603 being hinged to the movable base 100, a second end of the third back link 603 being hinged to the first back link 601.

[0101] The side edge of the first back link 601 is provided with an extension 6011, and a limiting plate 6012 for abutting against the third back link 603 is arranged on the extension 6011.

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

[0103] As shown in Figure 19 , the seat comprises a seat bag 701, a back bag 702 and the above-mentioned seat frame, the seat bag 701 being mounted on the top of the movable base 100, the back bag 702 being detachably connected to the seat bag 701, and the seat bag 701 being further detachably connected to the back link mounting component 604.

[0104] The seat bag 701 and the back bag 702 are connected through a zipper 703, as shown in Figure 21 and Figure 22 , the seat bag 701 is provided with a first flexible extension 7011, the back bag 702 is provided with a second flexible extension 7021, and the zipper 703 is arranged between the first flexible extension 7011 and the second flexible extension 7021. The first flexible extension 7011 and the second flexible extension 7021 can hide the zipper 703 in the seat, i.e. be hidden by the seat bag 701 and the back bag 702.

[0105] As shown in Figure 20 , the seat further comprises a back plate 704, the back plate 704 being detachably arranged on the fixed base 400, and the gap between the back plate 704 and the back bag 702 being greater than or equal to 10 cm when the seat is in the zero-gravity posture.

[0106] When the back plate 704 is detachably arranged on the fixed base 400 and the gap between the back plate 704 and the back bag 702 is greater than or equal to 10 cm, the user can put his hand into the fixed base 400 and detach the back plate 704 from the fixed base 400.

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

[0108] Currently, the seat capable of switching between the regular sitting posture and the zero-gravity posture is provided with the leg support mechanism 300. In the regular sitting posture, the user's legs can freely droop, and in the zero-gravity posture, the user's legs are gradually lifted along with the rising of the leg support mechanism 300. The seat is provided with the driving mechanism 200, and the driver 202 located at the bottom of the seat bag 701 can drive the driving mechanism 200 to move, and the driving mechanism 200 drives the leg support mechanism 300 to move in the movement process.

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

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

[0111] In order to avoid the serpentine spring in the seat bag 701 from contacting the driver 202, the driver 202 can be biased, that is, deviated from the middle part of the driving mechanism 200. However, the driving mechanism 200 in the current seat is only connected to the leg support mechanism 300, and the driving mechanism 200 is in a state of lacking support; or the driving mechanism 200 only relies on a relatively thin transmission member to connect the leg support mechanism 300, resulting in unstable force transmission. When the driver 202 is biased, the above two cases 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 uneven, causing the driving mechanism 200 to vibrate.

[0112] In addition, when the seat switches from the regular sitting posture to the zero-gravity posture, the driving mechanism 200 drives a plurality of leg support mechanisms 300 to move, and lifts 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 uneven, it is easy to cause the torsion received by each leg support mechanism 300 to be uneven, thereby further causing the leg support mechanism 300 to vibrate and other problems, affecting the user's use experience.

[0113] As shown, Figure 1As shown, the seat frame comprises a movable base 100, a driving mechanism 200 and leg support mechanisms 300. In the process of switching between the normal sitting posture and the zero-gravity posture, the driving mechanism 200 can be stably supported to avoid the situation that the driving mechanism 200 moves out of synchronization at different positions. The driving mechanism 200 comprises a rotating component 201 and a driver 202. When the driving mechanism 200 is stably supported, the driver 202 can ensure the balance of the torsion of the rotating component 201 at different positions.

[0114] Meanwhile, the rotating component 201 in the driving mechanism 200 is fixedly connected to corresponding components in the leg support mechanisms 300, thereby directly driving the leg support mechanisms 300 to move without indirectly driving the movement of the leg support mechanisms 300 through additional transmission members. Therefore, when the driving mechanism 200 is stably supported, the seat frame of the present application can prevent the leg support mechanisms 300 from moving out of synchronization, ensure the balance of the torsion of the leg support mechanisms 300, and further avoid abnormal phenomena such as shaking of the leg support mechanisms 300.

[0115] As shown in Figure 2 and Figure 3 In some examples, the movable base 100 adopts a hollow frame structure and is used to mount a seat bag 701. The movable base 100 comprises two side frames 101 and two cross beams. The side frames 101 and one of the cross beams 103 and the other cross beam 102 adopt a rod structure. Two side frames 101 are arranged at opposite positions 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. The other cross beam 102 is arranged at a position away from the leg support mechanisms 300 in the movable base 100.

[0116] The rotating component 201 adopts a rod structure. The material of the movable base 100 and the rotating component 201 needs to have a certain strength to avoid abnormal movement such as bending and twisting of the rotating component 201 during movement, thereby further ensuring the balance of the torsion of the rotating component 201 during rotation.

[0117] Specifically, the rotating component 201 is formed as a rotating rod and arranged between the two side frames 101. The two ends of the rotating component 201 are rotatably connected to the two side frames 101. It is worth noting that the rotatable connection of the rotating component 201 and the side frames 101 does not affect the supporting effect of the side frames 101 on the rotating component 201. The extension directions of the two side frames 101 are parallel to each other. The extension directions of the other cross beam 102 and the rotating component 201 are perpendicular to the side frames 101. Therefore, the other cross beam 102, the two side frames 101 and the rotating component 201 form a closed rectangular structure.

[0118] Meanwhile, the leg supporting mechanism 300 comprises a leg telescopic assembly 301, and it is understood that two leg supporting mechanisms 300 are arranged to ensure that the user's legs can be supported evenly. In addition, the two leg supporting mechanisms 300 are respectively arranged on opposite sides of the movable base 100.

[0119] In addition, the two leg supporting mechanisms 300 are fixedly connected to the rotating part 201 and form a common motion whole with the rotating part 201. Meanwhile, the leg telescopic assembly 301 is formed as a connecting rod mechanism, and the rotating part 201 drives the leg telescopic assembly 301 to rotate, so as to drive the leg telescopic assembly 301 to stretch or contract.

[0120] During the movement of the leg telescopic assembly 301, the leg telescopic assembly 301 can be contracted to the bottom of the movable base 100 or stretched to the outside of the movable base 100. It is understood that when the leg telescopic assembly 301 is contracted to the bottom of the movable base 100, the chair of the present application is adapted to the normal sitting posture of the user; when the leg telescopic assembly 301 is stretched to the outside of the movable base 100, the chair of the present application is adapted to the weightless posture of the user.

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

[0122] As shown in Figure 4 , Figure 5 and Figure 6 , 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, so that the cross section of one of the cross beams 103 at the position where the connecting protrusion 1034 is arranged is increased. When one of the cross beams 103 contacts the side frame 101 at the position where the connecting protrusion 1034 is arranged, the contact area between one of the cross beams 103 and the side frame 101 is increased, so as to facilitate the stability of the connection between one of the cross beams 103 and the side frame 101.

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

[0124] In some examples, the crossbeam 103 further comprises an extension 1033, which is also angularly connected with the covering portion 1032, and the extension 1033 and the avoiding portion 1031 are connected on opposite sides of the covering portion 1032, i.e. on opposite sides of the rotating component 201, so that the crossbeam 103 forms a top-located semi-enclosed structure for the rotating component 201.

[0125] In some examples, one of the crossbeams 103 is welded to the side frame 101, and 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 the crossbeam 103 and the side frame 101 can be increased, so as to ensure the stable connection between the crossbeam 103 and the side frame 101.

[0126] In some examples, the seat bag 701 is arranged on the top of the movable base 100, and in order to ensure the comfort of the user when sitting, the movable base 100 comprises a resilient component arranged at the bottom of the seat bag 701 to provide the user with a resilient touch. Specifically, the resilient component is a serpentine spring.

[0127] It is worth noting that, in the avoiding portion 1031, the position where the serpentine spring is connected is a direct force position and a position where the structure is the weakest, and the lug 10311 can increase the thickness of this position to some extent, thereby improving the deformation resistance of the avoiding portion 1031 and the deformation resistance of the crossbeam 103.

[0128] In some examples, the height of the lug 10311 is lower than the height of the hook 1021, and when 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 direction of the elastic force of the middle part of the serpentine spring applied to the seat bag 701 is inclined to the front of the seat frame.

[0129] Specifically, the front of the seat frame is the position where the leg support mechanism 300 of the seat frame is arranged, and the user performs a standing-up action in the front of the seat frame when using, so that the position setting of the lug 10311 and the hook 1021 in the height direction can assist the user in standing up.

[0130] As shown in Figure 7 , Figure 8 and Figure 9 , in some examples, the inside of the crossbeam 103 is provided with a buffer structure 104, which is arranged in the crossbeam 103 and between the crossbeam 103 and the rotating component 201, so that when an object in the external environment collides with the crossbeam 103, the buffer structure 104 can alleviate the impact force and avoid the crossbeam 103 from being concave toward the rotating component 201.

[0131] The buffer structure 104 is provided with a matching camber surface 1041 which matches the shape of the rotating component 201, and the buffer structure 104 contacts the rotating component 201 through the matching camber surface 1041.

[0132] In some examples, the driving mechanism 200 comprises a driver 202 which can output linear motion. Specifically, the driver 202 can adopt the structural form of an electric push rod, a pneumatic cylinder, a hydraulic cylinder, etc.

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

[0134] Further, the driving mechanism 200 further comprises a driver mounting component 203 which is fixedly arranged on the side wall of the rotating component 201 and extends a certain distance outward of the rotating component 201.

[0135] Specifically, the driver mounting component 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 component 203 is hinged with the driver 202 through the hinge hole and the hinge shaft.

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

[0137] When the length of the driver 202 is increased, the driver 202 pushes the driver mounting component 203 to rotate towards the direction close to the leg support mechanism 300, thereby driving the rotating component 201 to rotate, and the rotating component 201 drives the leg telescopic assembly 301 to gradually extend to the outside of the mobile base 100, so that the user gradually assumes a zero-gravity posture.

[0138] When the length of the driver 202 is reduced, 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, and the rotating component 201 drives the leg telescopic assembly 301 to gradually retract to the bottom of the mobile base 100, so that the user gradually assumes a regular sitting posture.

[0139] In some examples, in the currently existing seat, the driver in the seat is connected to the symmetrical center position of the driving mechanism, ensuring that the torsional forces transmitted by both ends of the driving mechanism are balanced. However, the driver 202 at the symmetrical center of the driving mechanism is also at the middle of the movable base 100, and the movable base 100 also places the seat bag 701 that bears the user's hips. Under the action of the user's gravity, the serpentine spring in the seat bag inevitably appears obvious sagging, and the sagging phenomenon of the middle of the serpentine spring is the most obvious, which easily leads to the situation that the serpentine spring contacts the driver 202, affecting the user's sitting feeling.

[0140] Since the rotating part 201 of the present application is always stably supported on the movable base 100, the driver 202 connected to any position of the side wall of the rotating part 201 can ensure that the torsional forces of both ends of the rotating part 201 are balanced, avoiding the shaking of the rotating part 201 and improving the user's experience.

[0141] Optionally, since the setting position of the driver 202 of the present application can be arbitrarily selected, it can be set near the side frame 101 to avoid the sagging serpentine spring in the seat bag contacting the driver 202, thereby further improving the user's experience.

[0142] As shown in Figure 13 In some examples, the end of the rotating part 201 is provided with a first insertion hole 2011, and the extension direction of the first insertion hole 2011 is the axial direction of the rotating part 201. At the same time, the side of the side frame 101 facing the rotating part 201 is provided with a first support column 1011, and the extension direction of the first support column 1011 is also the axial direction of the rotating part 201. It can be understood that the shape of the first insertion hole 2011 matches the shape of the first support column 1011, facilitating the insertion of the first support column 1011. When the first support column 1011 is inserted into the first insertion hole 2011, the rotating part 201 and the side frame 101 form a rotating connection, and the first support column 1011 can provide support for the rotating part 201.

[0143] It can be understood that both ends of the rotating part 201 are provided with the first insertion hole 2011, and both side frames 101 are provided with the first support column 1011, ensuring that both ends of the rotating part 201 are rotatably supported on the movable base 100 in a plug-in manner.

[0144] Specifically, the rotating part 201 includes a connecting rod, a first support column 1011 and a driver mounting part 203, the first insertion hole 2011 is arranged on the connecting rod, and the first support column 1011 is threadedly connected with the first insertion hole 2011. When the first support column 1011 is threadedly connected with the first insertion hole 2011, the first support column 1011 can rotate relative to the fixed base 400, as Figure 11As shown. The structure guarantees that the rotating component 201 is detachable and replaceable. The structure makes the first support column 1011 as a rotating vulnerable part and the fixed base 400 as a rotating direct load-bearing part, which can increase the anti-deformation capacity of the load-bearing part.

[0145] In addition, the first support column 1011 is sleeved with a gasket 204, which is between the first support column 1011 and the end of the rotating component 201, to avoid 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 rotationally connected to the side frame 101 is close to the end of the side frame 101, i.e., the rotating component 201 is at the edge position of the active base 100, thereby meeting the installation space requirement of the driver 202.

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

[0148] The driving rod 302 is fixedly connected to the rotating component 201. Since the leg support mechanism 300 needs to be provided with two, corresponding to the left leg and the right leg of the user, the driving rod 302 is also provided with two. Specifically, the two driving rods 302 are located at the two ends of the rotating component 201.

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

[0150] As shown in FIGS. Figure 14 and Figure 15 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 driving rod 302, and on the other hand, the first telescopic unit is hinged to the active base 100. The rotation of the driving 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] 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, the hinged position of the first end of the first leg link 303 is at a certain distance from the position of the rotating component 201.

[0153] Further, 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. Meanwhile, the second leg link 304 is also hinged to the driving rod 302, so that the side frame 101, the first leg link 303, the second leg link 304, and the driving rod 302 form a closed four-bar mechanism, which is conducive to ensuring the stability of the extension and retraction 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 driving rod 302, and the third leg link 305 is also hinged to the leg link mounting component 306, i.e., the second leg link 304 and the third leg link 305 are both hinged to the leg link mounting component 306, so that the driving rod 302, the second leg link 304, the third leg link 305, and the leg link mounting component 306 form a closed four-bar mechanism, which further ensures the stability of the extension and retraction movement of the first telescopic unit.

[0155] In some examples, the leg telescopic assembly further includes a second telescopic unit, which is hinged to the leg link mounting component 306 on one hand, and hinged to the third leg link 305 on the other hand. The driving rod 302 drives the first telescopic unit to perform the extension and retraction process, and the first telescopic unit further drives the second telescopic unit to perform the extension and retraction process, so as to realize the second-stage extension and retraction 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 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.

[0157] 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, 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 at two ends of the third leg link 305, and the leg link mounting component 306 is hinged at the middle of the third leg link 305, so as to facilitate the third leg link 305 to exert driving force on the fifth leg link 308 during rotation.

[0159] In some examples, the leg link mounting component 306 is substantially 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 component 306 are close to the three angular positions of the leg link mounting component 306 respectively, so as to ensure 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 component 306 are separated from each other, facilitate the second leg link 304, the third leg link 305, the driving rod 302 and the leg link mounting component 306 to form a four-bar mechanism, and facilitate the third leg link 305, the fourth leg link 307, the fifth leg link 308 and the leg link mounting component 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 lower leg.

[0161] When the movable base 100 slides, the relative positions between the movable base 100 and the fixed base 400 change. When the movable base 100 is within the range of the fixed base 400 by sliding, the user on the movable base 100 is in a regular sitting posture; when the movable base 100 moves out of the range of the fixed base 400 by sliding, the user on the movable base 100 is in a zero-gravity sitting posture.

[0162] Further, the driving 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 high-strength material, when the rotating component 201 rotates, the rotating component 201 can avoid shaking and the torsion of each position of the rotating component 201 can be 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 the length.

[0163] Meanwhile, 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, the leg support mechanism 300 is provided with two, respectively on opposite sides of the movable base 100, corresponding to the user's legs.

[0164] The rotating component 201 and the driving rod 302 form a whole, i.e. a rotating assembly. The rotating assembly drives the leg telescopic assembly 301 to perform telescopic movement by rotating.

[0165] The driver 202 is arranged at any position of the rotating component 201, which can ensure the consistency of the movement of the rotating component 201 at different positions, so as to ensure the balance of the torsion of the rotating component 201 at different positions, and avoid the shaking of the chair frame. Therefore, the driver 202 can be arranged at a position deviating from the center of the movable base 100. When the snake-shaped spring on the top of the movable base 100 sinks, the driver 202 arranged at a position deviating from the center of the movable base 100 can avoid contacting with the snake-shaped spring, thereby improving the sitting feeling of the user.

[0166] It is worth noting that the movement of the leg stretching assembly 301 is interlocked with the movement of the movable base 100. When the movable base 100 is within the range of the fixed base 400 by sliding, the leg stretching assembly 301 is retracted at 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 moves out of the range of the fixed base 400 by sliding, the leg stretching assembly 301 is extended 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 posture.

[0167] In some examples, the rotating component 201 and the driving rod 302 are fixedly connected, the rotating component 201 is supported on the movable base 100 and is rotationally connected with the movable base 100, and the driving rod 302 is hinged with the leg stretching assembly 301, so as to drive the leg stretching assembly 301 to retract or extend.

[0168] Specifically, the rotating component 201 and the movable base 100 can be connected in a plug-in manner, which can provide sufficient support for the rotating component 201 under the premise of rotationally connecting the rotating component 201 with the movable base 100.

[0169] In some examples, as shown in Figure 16 and Figure 17 The chair frame includes a connecting mechanism 500. On one hand, the connecting mechanism 500 connects the movable base 100, and on the other hand, the connecting mechanism 500 connects the rotating component, and at the same time, the connecting mechanism 500 also connects the fixed base 400. Specifically, the connecting mechanism 500 connects the driving rod 302 in the leg supporting mechanism 300. Therefore, the movable base 100, the leg supporting mechanism 300 and the fixed base 400 are connected with each other through the connecting mechanism 500, which ensures that the extension movement of the leg supporting mechanism 300 and the sliding movement of the movable base 100 are interlocked.

[0170] The connecting mechanism 500 is hinged to the driving rod 302 of the rotating assembly, is also hinged to the fixed base 400, and is rotationally connected to the movable base 100. When the rotating component 201 drives the driving rod 302 to rotate, the driving rod 302 drives the leg support mechanism 300 to perform the telescopic movement. At the same time, the driving rod 302 transmits the force to the connecting mechanism 500, and the connecting mechanism 500 transmits the force to the fixed base 400. 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, as shown in Figure 17 The connecting mechanism 500 is formed as a linkage mechanism, and includes a first linkage 501, a second linkage 502, and a third linkage 503, which are sequentially hinged.

[0172] The first linkage 501 is hinged to the driving rod 302, and the third linkage 503 is hinged to the fixed base 400. The second linkage 502 includes a first hinged part 5021, a second hinged part 5022, and a rotationally connected part 5023. The first linkage 501 is hinged to the second linkage 502 through the first hinged part 5021, and the third linkage 503 is hinged to the second linkage 502 through the second hinged part 5022. At the same time, the second linkage 502 is rotationally connected to the movable base 100 through the rotationally connected part 5023.

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

[0174] In some examples, in order to ensure that the direction of the pushing force received by the movable base 100 matches the movement direction of the movable base 100, 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 rotationally connected part 5023 and the first hinged part 5021 to the distance between the rotationally connected part 5023 and the second hinged part 5022 is 1:1 to 1:3.

[0175] In some examples, as shown in Figure 1 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 the fixed base 400; on the other hand, the back support mechanism 600 is hinged to the movable base 100. The lengths of the linkages 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 mount a backrest, and the back support mechanism 600 supports the back of a user through the backrest.

[0176] The movable base 100 drives the back support mechanism 600 to change the angle 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 for mounting the backrest and the horizontal plane gradually decreases, so that the user gradually enters the zero-gravity posture. When the movable base 100 gradually moves into the range of the fixed base 400, the angle between the structure for mounting the backrest and the horizontal plane gradually increases, so that the user gradually enters the regular sitting posture.

[0177] It can be understood that the angle adjustment process of the back support mechanism 600, the sliding process of the movable base 100, and the extension process of the leg support mechanism 300 are interlocked with each other, so that the user can freely switch between the zero-gravity posture and the regular sitting posture.

[0178] It is worth noting that when the angle between the structure for mounting the backrest of the back support mechanism 600 and the horizontal plane is maximum, the back support mechanism 600 is in the limit position, at this time, the back support mechanism 600 is within the range of the fixed base 400. When the angle between the connecting rod for mounting the backrest of the back support mechanism 600 and the horizontal plane decreases, the movement direction of the back support mechanism 600 as a whole 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 arranged against a wall, the back support mechanism 600 will not interfere with the wall during movement, that is, the chair frame of the present application can realize "zero against the wall".

[0180] In some examples, as shown in Figure 18 and Figure 19 The back support mechanism 600 includes a first back connecting rod 601, a second back connecting rod 602, a third back connecting rod 603, and a back connecting rod mounting component 604.

[0181] Further, in the height direction, the hinge position of the first end of the first back connecting rod 601 is greater than the hinge position of the first end of the second back connecting rod 602. In the horizontal direction, the hinge position of the first end of the second back connecting rod 602 is closer to the movable base 100 than the hinge position of the first end of the first back connecting rod 601.

[0182] At the same time, the hinge position of the second end of the first back connecting rod 601 and the hinge position of the second end of the second back connecting rod 602 are spaced apart.

[0183] 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 second back link 602 also changes its angle relative to the fixed base 400 due to the restriction of the four-bar linkage. Since the first end of the first back link 601 and the first end of the second back link 602 are hinged at different positions, the forces exerted by the first back link 601 and the second back link 602 on the back link mounting component 604 during the rotation are different in direction, thus driving the back link mounting component 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 component 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 compound motion including movement and rotation, and the third back link 603 further transmits the force to the first back link 601, thereby exerting a driving force on the first back link 601 to make the first back link 601 rotate.

[0185] In some examples, the back link mounting component 604 is fixedly connected with a backrest mounting plate 605, which is used to mount a backrest. When the first back link 601, the second back link 602 and the third back link 603 move cooperatively, the back link mounting component 604 rotates, thereby driving the backrest mounting plate 605 to rotate. At this time, the angle of the backrest changes, thereby adapting to the user's regular sitting posture or weightless posture.

[0186] In some examples, the side edge of the first back link 601 is provided with an extension 6011 extending to 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 6011. It can be understood that the hinging position of the second end of the third back link 603 deviates from the line connecting the first end of the first back link 601 and the second end of the first back link 601, thereby ensuring that the back link mounting component 604 can be at a desired angle. It can be understood that the hinging 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 component 604. The user can adaptively adjust the above variables according to actual needs, thereby ensuring the rotation amplitude and rotation speed of the back link mounting component 604.

[0187] In some examples, the angle between the back of the user and the thighs of the user is between 121° and 135° when the user is in the zero-gravity posture. In the chair of the present application, the top of the movable base 100 is provided with a seat bag, which defines the position of the thighs of the user, and the back link mounting component 604 is provided with a backrest mounting plate 605, which is used to mount a backrest, and the backrest defines the position of the back of the user. Therefore, the angle between the backrest and the seat bag is also between 121° and 135° when the user is in the zero-gravity posture, i.e., the angle between the movable base 100 and the backrest mounting plate 605 is between 121° and 135°.

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

[0189] The embodiments of the present application provide that the seat bag is connected to the top of the movable base 100 and is used to support the thighs of the user, the backrest is connected to the back support mechanism 600 and is used to support the back of the user, the backrest is detachably connected to the seat bag, and the leg rest is connected to the leg support mechanism 300 and is used to support the legs of the user.

[0190] In some examples, the chair further comprises a back plate, the back side of the fixed base 400 is provided with a back plate mounting structure 705, which can adopt an extension rod fixedly connected to the fixed base 400, and the back plate is connected to the back side of the chair through the back plate mounting structure 705, thereby shielding the internal structure of the chair and improving the aesthetic level of the chair.

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

[0192] It is worth noting that the gap between the inner plate and the backrest of the chair is greater than or equal to 10 cm when the chair is in the zero-gravity posture, so as to facilitate the maintenance of the internal structure of the chair.

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

[0194] Meanwhile, the rotating component 201 is rotatably supported on the movable base 100, ensuring synchronous movement of the rotating component 201 everywhere, avoiding the leg support mechanism 300 from shaking, and ensuring the torsion balance of the two leg support mechanisms 300, improving the user's experience. At the same time, the driver 202 is arranged near the side frame 101, and the rotating component 201 is at the edge of the movable base 100, avoiding the snake-shaped spring in the seat bag from sinking to contact the driver 202 and the rotating component 201, improving the user's sitting feeling. And the back support mechanism 600 is always within the range of the fixed base 400, realizing zero wall leaning of the seat frame.

[0195] The embodiments of the present application are described in detail above with reference to the drawings, but the present application is not limited to the above-described embodiments, and various changes can be made within the knowledge of those skilled in the art in the technical field without departing from the purpose of the present application. 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 bracket, characterized in that, The utility model provides a kind of chair, including: Movable base; Driving mechanism, the driving mechanism includes rotating component supported in the movable base, the rotating component is rotatably arranged in the movable base; Leg support mechanism, the leg support mechanism is fixedly connected to the rotating component, the leg support mechanism includes leg telescopic assembly, the rotating component drives the leg telescopic assembly to rotate by rotating, to drive the leg telescopic assembly to stretch or shrink; Wherein, rotating component is detachably arranged in movable base.

2. The seat pan of claim 1, wherein The movable base includes side frame arranged on opposite sides and crossbeam arranged between each side frame, the crossbeam is provided with connecting protrusion, and the crossbeam is connected to the side frame through the connecting protrusion.

3. A seat pan according to claim 2, characterised in that The connecting protrusion includes straight line part and bending part connected with straight line part, and the bending part is connected with the crossbeam, and the straight line part and the bending part are respectively integrated with the side frame by welding.

4. The seat pan of claim 2, wherein The leg support mechanism is hinged to the movable base, and the crossbeam includes covering part and avoiding part, the avoiding part is connected with the covering part at an angle, and the avoiding part is arranged at an angle to avoid the leg support mechanism.

5. The seat pan of claim 1, wherein The movable base includes side frame arranged on opposite sides and two crossbeams arranged between each side frame, and one of the crossbeams further includes covering part, avoiding part and extension part, the extension part is connected with the covering part at an angle, and the extension part and the avoiding part are located on opposite sides of the covering part. The rotating component is rotatably arranged in the side frame, the covering part covers the top of the rotating component, and the avoiding part and the extension part are located on opposite sides of the rotating component.

6. A seat pan according to claim 5, characterised in that A gasket is arranged between the rotating component and the side frame, an end of the rotating component is provided with a first socket, the side frame is provided with a first support inserted into the first socket, and the gasket is sleeved on the first support and located between the side frame and the rotating component.

7. The seat pan of claim 5, wherein The movable base includes elastic component, the avoiding part is provided with ear, the hollow part of the ear defines a hanging channel, the other crossbeam is provided with a hook, one end of the elastic component is hung in the hanging channel, and the other end of the elastic component is hung in the hook.

8. A seat pan according to claim 7, characterised in that The height of the hanging channel is lower than the height of the hook.

9. The seat pan of claim 5, wherein One of the crossbeams is internally provided with a buffer structure, the buffer structure is provided with a matching arc surface matched with the shape of the rotating component, and the buffer structure contacts the rotating component through the matching arc surface.

10. The seat pan of claim 9, wherein The avoiding part is provided with a first clamping groove, the buffer structure is provided with a first clamping part embedded in the first clamping groove, and the buffer structure and the avoiding part are connected through the first clamping part and the first clamping groove. And / or, the extension part is provided with a second clamping groove, the buffer structure is provided with a second clamping part embedded in the second clamping groove, and the buffer structure and the extension part are connected through the second clamping part and the second clamping groove.

11. The seat pan of claim 2, wherein The seat frame further includes a fixed base, the movable base, the leg support mechanism and the fixed base are connected to each other through a connecting mechanism, the movable base 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 connecting mechanism. The connecting mechanism and / or the leg supporting mechanism are located below the connecting protrusion.

12. The seat pan of claim 1, wherein The seat further comprises a back supporting mechanism, the back supporting mechanism comprising a first back link, a second back link, a third back link and a back link mounting part, a first end of the first back link being hinged to the fixed base, a second end of the first back link being hinged to the back link mounting part, a first end of the second back link being hinged to the fixed base, a second end of the second back link being hinged to the back link mounting part, a first end of the third back link being hinged to the movable base, and a second end of the third back link being hinged to the first back link. The side edge of the first back link is provided with an extension part, and a limiting plate for abutting against the third back link is arranged on the extension part.

13. A seat characterized by, The seat further comprises a back plate, the back plate being detachably arranged on the fixed base, and a gap between the back plate and the backrest being greater than or equal to 10 cm when the seat is in the zero-gravity posture.

14. The sitter of claim 13, wherein, The rotating part is connected to the movable base by a screw.

15. The sitter of claim 14, wherein, ​ 16. The sitter of claim 13, wherein, ​ 17. The sitter of claim 13, wherein, ​

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