A seat stand and a seat

Abstract

The application discloses a seat frame and a seat. The seat frame comprises a base assembly, a leg support assembly and an adjusting assembly. The base assembly comprises a fixed base and a movable base. The leg support assembly comprises a linkage component and a leg telescopic mechanism. The adjusting assembly comprises an adjusting component rotatably connected to the linkage component. The adjusting component is provided with a sliding structure and a locking structure. When the seat frame is switched between a sitting position and a TV position, the adjusting component and the movable base are slidably connected through the sliding structure, and the leg telescopic mechanism and the linkage component can be synchronously rotated. On the premise that the position of the movable base is unchanged, the leg telescopic mechanism can be independently stretched and contracted. When the seat frame is switched between a lying position and the TV position, the locking structure limits the rotation of the linkage component, thereby limiting the rotation of the leg telescopic mechanism. On the premise that the leg telescopic mechanism is kept stretched, the angle of the movable base can be independently adjusted.

Description

Technical Field

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

[0002] When the seat is in the TV position, the seat cushion maintains the angle of a normal sitting posture, and the backrest remains at the same angle or is slightly reclined, resulting in an angle of approximately 120° between the seat cushion and backrest. Simultaneously, the leg rest extends and lifts, supporting the user's lower limbs while ensuring the ankles hang naturally. This TV position effectively reduces pressure load on the lumbar intervertebral discs, decreases the risk of lower limb venous congestion compared to traditional sitting postures, and improves the biomechanical balance of the spine in the sagittal plane, thus reducing the incidence of lower back pain.

[0003] Currently, most dynamic posture adjustment seats on the market suffer from limited functionality, only allowing for transitions between sitting and reclining positions. When changing from a sitting to a reclining position, the leg rest height adjustment mechanism and the seat cushion angle adjustment mechanism form a rigid linkage, lacking independent control functionality. This design bottleneck prevents the seat system from achieving a TV-like posture, limiting the user's diverse needs for rest postures. Utility Model Content

[0004] This application aims to address at least one of the technical problems existing in the prior art. To this end, this application proposes a seat frame capable of accommodating sitting, TV-like, and reclining postures.

[0005] This application also proposes a seating arrangement having the aforementioned seat frame.

[0006] According to a first aspect embodiment of the present application, the seat frame includes a base assembly, a leg support assembly, and an adjustment assembly. The base assembly includes a fixed base and a movable base, which are slidably connected. The leg support assembly includes a linkage component and a leg extension mechanism, which are capable of rotating synchronously to drive the leg extension mechanism to perform extension and retraction movements. The adjustment assembly includes an adjustment component rotatably connected to the linkage component, which has a sliding structure and a locking structure. The movable base has a slider. When the slider slides within the range of the sliding structure, the movable base and the fixed base slide relative to each other. When the slider slides within the range of the locking structure, the relative sliding between the movable base and the fixed base is restricted.

[0007] The seat frame according to the embodiments of this application has at least the following beneficial effects: when the seat frame switches between a sitting posture and a TV posture, the adjusting component and the movable base are slidably connected through a sliding structure, and the leg extension mechanism and the linkage component can rotate synchronously. Under the premise that the position of the movable base remains unchanged, it is convenient for the leg extension mechanism to perform extension and retraction movements independently; when the seat frame switches between a reclining posture and a TV posture, the locking structure restricts the rotation of the linkage component, thereby restricting the rotation of the leg extension mechanism. Under the premise that the leg extension mechanism remains extended, it is convenient to adjust the angle of the movable base independently.

[0008] According to some embodiments of this application, the sliding structure is a groove that extends toward the linkage component, and the slider can slide within the range of the groove.

[0009] According to some embodiments of this application, the locking structure is a locking groove, which is connected to the slide groove, and the extending direction of the locking groove is at an angle to the extending direction of the slide groove.

[0010] According to some embodiments of this application, the fixed base is provided with a first stop, which contacts the edge of the adjusting component.

[0011] According to some embodiments of this application, the adjusting component includes a lifting edge parallel to the extension direction of the chute, and the first stop restricts the slider to be within the range of the chute by contacting the lifting edge.

[0012] According to some embodiments of this application, the adjustment component includes a guide edge, and the first stop guides the slider from the locking groove into the slide groove by contacting the guide edge.

[0013] According to some embodiments of this application, the adjusting component is provided with a slot, and the movable base is provided with a second stop. When the second stop is inserted into the slot, the slider is located within the range of the locking groove to restrict the rotation of the linkage component.

[0014] According to some embodiments of this application, the seat frame further includes a transmission assembly and a drive component. The drive component (401) is rotatably connected to the movable base (102). The fixed base and the movable base are connected through the transmission assembly. The transmission assembly and the leg support assembly are connected through the drive component. The drive component is used to drive the linkage component and the leg extension mechanism to rotate, and also to drive the movable base to slide relative to the fixed base.

[0015] According to some embodiments of this application, the transmission assembly includes a linkage mechanism and a mounting component disposed on the linkage mechanism. The fixed base and the movable base are connected through the linkage mechanism. The mounting component has a bending portion that extends outward, and the driving component is rotatably connected to the bending portion.

[0016] According to some embodiments of this application, the linkage mechanism includes a first link and a second link that are rotatably connected. The first link is rotatably connected to the movable base, the second link is rotatably connected to the fixed base, and the mounting component is fixedly connected to the first link.

[0017] According to some embodiments of this application, the first connecting rod includes a first straight portion and a second straight portion, the first straight portion and the second straight portion are connected at an angle, the first straight portion is rotatably connected to the movable base, the second straight portion is rotatably connected to the second connecting rod, and the mounting component is fixedly connected to the first straight portion.

[0018] According to some embodiments of this application, an elastic member is provided between the mounting component and the movable base, and the mounting component and the movable base are elastically connected through the elastic member.

[0019] According to some embodiments of this application, the movable base is provided with a crossbeam, and the elastic member elastically connects the mounting component and the crossbeam.

[0020] According to some embodiments of this application, when the seat frame is in a sitting position, the linkage component retracts to the range of the movable base, and the slider is located within the range of the sliding structure; when the seat frame is in a TV position, the linkage component extends beyond the range of the movable base, and the slider is located at the end of the sliding structure away from the linkage component; when the seat frame is in a reclining position, the linkage component extends beyond the range of the movable base, and the slider is located within the range of the locking structure.

[0021] According to a second aspect embodiment of this application, the seating includes the aforementioned seat frame;

[0022] The seat has a sitting position, a TV position, and a reclining position. When the seat is between the sitting position and the TV position, the slider is located in the sliding structure. When the seat is between the TV position and the reclining position, the slider is located in the locking structure.

[0023] According to some embodiments of this application, the seating also includes a back support assembly, which includes a third link, a fourth link, a fifth link, and a backrest mounting component. One end of the third link is rotatably connected to the fixed base, and the other end is rotatably connected to the backrest mounting component. One end of the fourth link is rotatably connected to the fixed base, and the other end is rotatably connected to the backrest mounting component. One end of the fifth link is rotatably connected to the movable base, and the other end is rotatably connected to the third link. When the movable base moves out of the range of the fixed base, the movable base causes the back support assembly to extend towards the leg support assembly.

[0024] 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 base assembly, a leg support assembly, and an adjustment assembly. When the seat frame switches between a sitting posture and a TV posture, the adjustment component and the movable base are slidably connected through a sliding structure, and the leg extension mechanism and the linkage component can rotate synchronously. Under the premise that the position of the movable base remains unchanged, it is convenient for the leg extension mechanism to perform extension and retraction movements independently. When the seat frame switches between a reclining posture and a TV posture, the locking structure restricts the rotation of the linkage component, thereby restricting the rotation of the leg extension mechanism. Under the premise that the leg extension mechanism remains extended, it is convenient to adjust the angle of the movable base independently.

[0025] 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

[0026] 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.

[0027] Figure 1 This is a schematic diagram of the seat frame structure according to an embodiment of this application;

[0028] Figure 2 This is a top view of the seat frame according to an embodiment of this application;

[0029] Figure 3 This is a front view of the adjustment component in the seat frame according to an embodiment of this application;

[0030] Figure 4 This is a front view of the internal structure of the seat frame in the sitting position according to an embodiment of this application;

[0031] Figure 5 This is the seat frame of the embodiment of this application. Figure 4 A schematic diagram of the structure of part A;

[0032] Figure 6This is a front view of the internal structure of the slider within the slide groove when the seat frame is in the TV posture according to an embodiment of this application;

[0033] Figure 7 This is the seat frame of the embodiment of this application. Figure 6 A structural diagram of section B;

[0034] Figure 8 This is a front view of the internal structure of the slider within the locking groove when the seat is in the TV posture according to an embodiment of this application;

[0035] Figure 9 This is the seat frame of the embodiment of this application. Figure 8 A structural diagram of section C;

[0036] Figure 10 This is a front view of the internal structure of the seat frame in a reclining position according to an embodiment of this application;

[0037] Figure 11 This is a front view of the first link in the seat frame of this application embodiment.

[0038] Figure label:

[0039] 101. Fixed base; 102. Movable base; 1021. Crossbeam; 103. First guide groove; 104. First guide block; 105. Second guide groove; 106. Second guide block;

[0040] 201. Linkage component; 202. Leg extension mechanism; 203. Adjustment component;

[0041] 301. First extension; 302. Second extension; 303. Slide groove; 304. Slider; 305. Locking groove; 306. First stop; 307. Second stop; 308. Slot; 309. Lifting edge; 310. Guide edge;

[0042] 401. Drive component; 402. Mounting component; 4021. Bending part; 403. First connecting rod; 4031. First straight part; 4032. Second straight part; 404. Second connecting rod; 405. Elastic component;

[0043] 501. Third link; 502. Fourth link; 503. Fifth link; 504. Backrest mounting components. Detailed Implementation

[0044] The embodiments of this application are described in detail below with reference to the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0045] In the description of this application, it should be understood that the terms "center", "middle", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0046] In the description of this application, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0047] In the description of this application, unless otherwise expressly specified and limited, the terms "set up," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0048] In the description of this application, the use of terms such as "one embodiment," "some embodiments," "an example," "some instances," "some embodiments," "illustrative embodiment," "example," "specific example," and "some examples" indicates that the specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0049] like Figure 1 and Figure 2 As shown in the illustration, this application provides a seat frame, which includes a base assembly, a leg support assembly, and an adjustment assembly. The base assembly is used to mount a seat cushion, and the leg support assembly is used to mount a leg rest.

[0050] The seat frame of this application can be adjusted to three states: sitting, TV-like, and reclining. The seat frame can be adjusted from the sitting state to the TV-like state, and then from the TV-like state to the reclining state. Correspondingly, the seat frame can also be adjusted from the reclining state to the TV-like state, and then from the TV-like state back to the sitting state. When the seat frame is converted to the reclining state, it achieves zero gravity, simulating the posture of an astronaut in the weightless state of space, allowing the user's spine and muscles to be in a naturally relaxed state, effectively reducing physical stress.

[0051] Furthermore, when the seat frame switches between a sitting position and a TV position, the angle of the seat cushion remains unchanged, while the leg support component drives the leg rest to change angle through movement; when the seat frame switches between a TV position and a reclining position, the angle of the leg rest remains unchanged, while the base component drives the seat cushion to change angle through movement.

[0052] Meanwhile, the adjustment component can restrict or release the rotation of the leg support component. When the seat frame switches between a sitting and TV position, the adjustment component releases the rotation of the leg support component, making it easy to adjust the leg rest angle while keeping the seat cushion angle constant. When the seat frame switches between a TV position and a reclining position, the adjustment component restricts the rotation of the leg support component, making it easy to adjust the seat cushion angle while keeping the leg rest angle constant.

[0053] In some examples, the base assembly includes a fixed base 101 and a movable base 102, which are slidably connected, with the movable base 102 used to mount the seat cushion.

[0054] The fixed base 101 is in a constant position and supports the movable base 102. When the movable base 102 slides relative to the fixed base 101, the angle of the movable base 102 changes, thereby adjusting the angle of the seat cushion and allowing the seat frame to switch between a TV posture and a reclining posture.

[0055] Furthermore, a first guide structure and a second guide structure are provided between the fixed base 101 and the movable base 102, and the movable base 102 and the fixed base 101 are slidably connected through the first guide structure and the second guide structure.

[0056] Meanwhile, the first guide structure includes a first guide groove 103 and a first guide block 104. The first guide groove 103 is fixedly disposed on the fixed base 101, and the first guide block 104 is fixedly disposed on the movable base 102. The first guide block 104 is embedded in the first guide groove 103. When the movable base 102 moves relative to the fixed base 101, the first guide block 104 slides along the first guide groove 103 to guide the movement of the movable base 102.

[0057] Similar to the first guide structure, the second guide structure includes a second guide groove 105 and a second guide block 106. The second guide groove 105 is fixedly disposed on the fixed base 101, and the second guide block 106 is fixedly disposed on the movable base 102. The second guide block 106 is embedded in the second guide groove 105.

[0058] Specifically, the first guide groove 103 extends in a generally horizontal direction, while the second guide groove 105 extends at an angle to the horizontal direction, and the height of the second guide groove 105 gradually increases in the direction away from the first guide groove 103. The first guide groove 103 and the second guide groove 105 together define the direction of movement of the movable base 102 relative to the fixed base 101, thereby adjusting the angle of the movable base 102, that is, adjusting the angle of the seat cushion.

[0059] In some examples, the leg support assembly includes a linkage 201 and a leg telescopic mechanism 202, wherein the linkage 201 is formed as a rod-like structure and the leg telescopic mechanism 202 is formed as a linkage mechanism.

[0060] The leg extension mechanism 202 is used to install the leg rest. The leg extension mechanism 202 adjusts the angle and height of the leg rest through extension and retraction, thereby switching the seat frame between a sitting position and a TV position.

[0061] Furthermore, one end of the linkage component 201 is rotatably connected to the movable base 102, and the other end is rotatably connected to the leg extension mechanism 202. Simultaneously, the leg extension mechanism 202 is also rotatably connected to the movable base 102. Therefore, the leg extension mechanism 202 and the linkage component 201 form a unified moving unit. When the linkage component 201 rotates, the leg extension mechanism 202 extends and retracts; when the rotation of the linkage component 201 is restricted, the leg extension mechanism 202 remains in its current position, i.e., the leg support remains at its current angle and height.

[0062] In some examples, the adjustment component includes an adjustment member 203. On one hand, the adjustment member 203 is rotatably connected to the linkage member 201; on the other hand, the adjustment member 203 is slidably connected to the movable base 102. Therefore, the adjustment member 203 realizes the connection between the linkage member 201 and the movable base 102.

[0063] Furthermore, when the linkage component 201 and the leg extension mechanism 202 rotate synchronously, the linkage component 201 drives the adjustment component 203 to move, thereby causing the adjustment component 203 to slide relative to the movable base 102. It is understood that the rotation process of the linkage component 201 and the sliding process of the adjustment component 203 occur simultaneously. If the sliding of the adjustment component 203 relative to the movable base 102 is restricted, the rotation process of the linkage component 201 and the leg extension mechanism 202 cannot continue.

[0064] The adjustment component 203 is equipped with a sliding structure and a locking structure. The movable base 102 is fixedly equipped with a slider 304, which can slide within the range of the movable structure or the locking structure, thereby realizing the sliding connection between the adjustment component 203 and the movable base 102. When the slider 304 slides within the range of the sliding structure, the linkage component 201 and the leg extension mechanism 202 can rotate, facilitating the switching of the seat frame between a sitting position and a TV position. When the slider 304 slides within the range of the locking structure, the rotation of the linkage component 201 and the leg extension mechanism 202 is restricted, facilitating the switching of the seat frame between a TV position and a reclining position.

[0065] Specifically, when the seat frame switches between a sitting position and a TV position, the adjusting component 203 and the movable base 102 are connected via a sliding structure, allowing them to slide relative to each other. This enables the leg extension mechanism 202 to rotate, thus extending or retracting the leg extension mechanism 202. When the seat frame switches between a TV position and a reclining position, the adjusting component 203 and the movable base 102 are connected via a locking structure. Under the action of the locking structure, the adjusting component 203 and the movable base 102 cannot slide relative to each other, and the leg extension mechanism 202 cannot rotate, thus keeping the leg extension mechanism 202 in its extended position.

[0066] like Figure 3 As shown, in some examples, the adjusting member 203 is generally formed as a rod-shaped structure, i.e., an adjusting rod. The adjusting member 203 includes a first extension 301 and a second extension 302, which are connected together.

[0067] The first extension 301 is rotatably connected to the linkage component 201. Specifically, the end of the first extension 301 facing away from the second extension 302 is rotatably connected to the linkage component 201. Meanwhile, the second extension 302 is connected to the movable base 102. Specifically, a sliding structure and a locking structure are provided on the second extension 302.

[0068] In some examples, the sliding structure is formed as a groove structure, namely a groove 303. The width of the groove 303 corresponds to the shape of the slider 304, which facilitates the slider 304 to be inserted into the groove 303 and form a sliding connection. When the linkage component 201 rotates, the linkage component 201 drives the adjustment component 203 to move, while the position of the slider 304 remains constant. Therefore, the slider 304 slides relative to the adjustment component 203 within the groove 303.

[0069] It is understandable that when slider 304 slides to the end of groove 303, it reaches its limit position. Since the relative sliding process of slider 304 occurs simultaneously with the rotation of linkage component 201, when slider 304 reaches the end of groove 303, linkage component 201 also rotates to its limit position. Therefore, the length of groove 303 limits the relative sliding stroke of slider 304, and thus limits the rotational stroke of linkage component 201. It is understandable that the length of groove 303 can be set according to actual needs to ensure an appropriate rotational stroke of linkage component 201, guaranteeing the extension and retraction of leg telescopic mechanism 202.

[0070] In some examples, the locking structure is formed as a slot structure, namely locking slot 305. The width of locking slot 305 also corresponds to the shape of slider 304, and locking slot 305 communicates with slide groove 303. It can be understood that slider 304 can enter the range of locking slot 305 from the range of slide groove 303, and can also return from the range of locking slot 305 to the range of slide groove 303.

[0071] Furthermore, when the slider 304 reaches the range of the locking groove 305 through relative sliding, under the limiting effect of the slider 304 and the locking groove 305, the linkage component 201 can no longer drive the adjustment component 203 to move relative to the movable base 102, so that the leg extension mechanism 202 remains in the extended position. At this time, the movable base 102 and the fixed base 101 can move relative to each other, which makes it easy to adjust the angle of the movable base 102, so as to switch the seat frame between the TV posture and the reclining posture.

[0072] In some examples, the groove 303 extends toward the linkage component 201. When the slider 304 is within the range of the groove 303, the linkage component 201 can drive the adjustment component 203 to move by rotating, thereby realizing the relative sliding of the slider 304.

[0073] Furthermore, the extending direction of the locking groove 305 is at an angle to the extending direction of the sliding groove 303. When the slider 304 is within the range of the locking groove 305, since the slider 304 abuts against the side wall of the locking groove 305, there is no space for relative sliding. The linkage component 201 cannot drive the adjustment component 203 to move by rotation, thereby keeping the linkage component 201 in its current position, that is, the leg extension mechanism 202 also remains in its current form.

[0074] In some examples, the locking groove 305 is connected to the end of the slide groove 303 away from the linkage component 201. When the slider 304 reaches the end of the slide groove 303 away from the linkage component 201 through relative sliding, the slider 304 reaches the limit position of relative sliding, and the leg extension mechanism 202 is fully extended. In this case, the slider 304 further slides into the locking groove 305, limiting the movement of the leg extension mechanism 202. At the same time, when the seat is in the TV position and the reclining position, the slider 304 is always within the range of the locking groove 305, so that the leg extension mechanism 202 can maintain its extended shape when the seat is in the TV position and the reclining position.

[0075] In addition, the height of the locking groove 305 is greater than the height of the sliding groove 303. When the slider 304 reaches the end of the sliding groove 303 away from the linkage component 201 through relative sliding, the adjusting component 203 can fall by its own weight, so that the slider 304 enters the range of the locking groove 305 by itself, realizing the automatic locking of the leg extension mechanism 202 without the need to apply additional power.

[0076] In some examples, the fixed base 101 is provided with a first stop 306, which contacts different positions on the edge of the second extension 302 when the slider 304 is within the range of the slide groove 303 or the range of the locking groove 305.

[0077] The adjusting component 203 includes a lifting edge 309 and a guide edge 310, specifically, the lifting edge 309 and the guide edge 310 are located in the second extension 302.

[0078] Furthermore, when the seat frame switches between a sitting position and a TV position, the first stop 306 contacts the lifting edge 309, providing support for the adjusting component 203 and ensuring that the slider 304 is within the range of the slide groove 303. Simultaneously, the guide edge 310 is inclined to the lifting edge 309. When the seat frame switches from the TV position to a reclining position, the guide edge 310 avoids the first stop 306, facilitating the lowering of the adjusting component 203, thereby allowing the slider 304 to slide into the locking groove 305. When the seat frame switches from the reclining position to the TV position, the adjusting component 203 moves under the constraint of the first stop 306, causing the first stop 306 to transition from contacting the guide edge 310 to contacting the lifting edge 309. The slider 304 then slides out of the locking groove 305 and into the range of the slide groove 303.

[0079] In some examples, the adjusting component 203 is provided with a slot 308, and the movable base 102 is provided with a second stop 307. The width of the slot 308 corresponds to the size of the second stop 307, facilitating the insertion of the second stop 307 into the slot 308. When the second stop 307 is inserted into the slot 308, the slider 304 is located within the range of the locking groove 305. The locking groove 305 and the slot 308, together with the second stop 307 and the slider 304, limit the relative position of the adjusting component 203 and the movable base 102, thereby restricting the rotation process of the linkage component 201 and ensuring that the leg extension mechanism 202 maintains its extended shape.

[0080] like Figure 4 and Figure 5 As shown, during the transition from a seated position to a TV position, the first stop 306 contacts the lifting edge 309, the slider 304 is within the range of the slide groove 303, and the second stop 307 disengages from the slot 308. At this time, the adjusting component 203 and the movable base 102 can slide relative to each other, and the linkage component 201 and the leg extension mechanism 202 can rotate to facilitate the extension of the leg extension mechanism 202.

[0081] like Figure 6 and Figure 7 As shown, when the seat is switched to the TV position, the first stop 306 contacts the junction of the lifting edge 309 and the guide edge 310, the slider 304 is located at the end of the slide groove 303 away from the linkage component 201, and the second stop 307 disengages from the slot 308. At this time, the relative sliding of the adjusting component 203 and the movable base 102 reaches its limit position. Correspondingly, the rotation of the linkage component 201 and the leg extension mechanism 202 also reaches its limit position, and the leg extension mechanism 202 is fully extended.

[0082] like Figure 8 and Figure 9 As shown, during the transition from the TV position to the reclining position, the movable base 102 and the fixed base 101 slide relative to each other to adjust the angle of the movable base 102. This relative sliding causes the first stop 306 to reach the inclined guide edge 310, thus creating space for the adjustment component 203 to descend. As the adjustment component 203 descends according to its own weight, the slider 304 slides into the locking groove 305, and the second stop 307 gradually engages in the slot 308. At this point, the relative position of the adjustment component 203 and the movable base 102 is locked, the linkage component 201 remains in its current position, and the leg extension mechanism 202 remains in its extended position.

[0083] like Figure 10As shown, when the seat is switched to a reclining position, the relative sliding of the movable base 102 and the fixed base 101 reaches its limit position. The first stop 306 disengages from the adjusting component 203, the slider 304 is located within the locking groove 305, and the second stop 307 is engaged in the slot 308. At this time, the relative position of the adjusting component 203 and the movable base 102 is locked, the linkage component 201 remains in its current position, and the leg extension mechanism 202 remains in its extended state.

[0084] Understandably, during the transition from a reclining to a TV-like position, as the movable base 102 and the fixed base 101 move relative to each other, the guide edge 310 of the adjusting component 203 gradually contacts the first stop 306. Due to the inclined design of the guide edge 310, the first stop 306 gradually transitions from the guide edge 310 to the lifting edge 309, thereby raising the height of the adjusting component 203. At this time, the slider 304 slides out of the locking groove 305 and into the range of the sliding groove 303. Simultaneously, the second stop 307 gradually disengages from the slot 308, facilitating the subsequent retraction of the leg extension mechanism 202 through rotation.

[0085] The process of the seat frame transitioning from the TV position to the sitting position is the reverse of the process of the seat frame transitioning from the sitting position to the TV position, and will not be described in detail here.

[0086] In some examples, the seat frame also includes a transmission assembly and a drive component 401, which is used to drive the linkage component 201 and the leg extension mechanism 202 to rotate, and also to drive the movable base 102 to slide relative to the fixed base 101.

[0087] The drive component 401 is a component capable of outputting linear motion. Specifically, the drive component 401 can be a push rod motor.

[0088] Furthermore, the transmission assembly connects the movable base 102 and the fixed base 101. One end of the drive component 401 is connected to the transmission assembly, and the other end is connected to the leg extension mechanism 202. When the slider 304 is within the range of the slide groove 303, the linkage component 201 and the leg extension mechanism 202 can rotate freely. The drive component 401 drives the leg extension mechanism 202 and the linkage component 201 to rotate through length changes. When the slider 304 is within the range of the locking groove 305, the rotation of the linkage component 201 and the leg extension mechanism 202 is restricted, and the length changes of the drive component 401 can no longer drive the leg extension mechanism 202 and the linkage component 201 to rotate. However, at this time, the movable base 102 can slide relative to the fixed base 101, and the drive component 401 drives the movable base 102 to slide relative to the fixed base 101 through length changes. Therefore, the seat frame of this application uses a single drive component 401 to both drive the leg extension mechanism 202 to rotate and drive the movable base 102 to slide.

[0089] In some examples, the transmission assembly includes a linkage mechanism and a mounting component, wherein the linkage mechanism connects the movable base 102 and the fixed base 101.

[0090] When the seat is in a sitting or TV position, the movable base 102 does not extend beyond the range of the fixed base 101, and the aforementioned linkage mechanism is folded. When the seat is in a reclining position, the movable base 102 extends beyond the range of the fixed base 101 by sliding, and the aforementioned linkage mechanism extends. Therefore, the linkage mechanism drives the movable base 102 to slide relative to the fixed base 101 by rotation. It is understood that the drive component 401 can drive the linkage mechanism to rotate.

[0091] Specifically, the mounting component is fixedly connected to the linkage mechanism, and the mounting component has a bent portion 4021 extending outward. The end of the driving component 401 is connected to the mounting component through the bent portion 4021, and the end of the driving component 401 is rotatably connected to the mounting component. Therefore, the change in the length of the driving component 401 can drive the mounting component to rotate, and the mounting component in turn drives the linkage mechanism to rotate, thereby driving the movable base 102 to slide relative to the fixed base 101.

[0092] In some examples, the linkage mechanism includes a first link 403 and a second link 404. One end of the first link 403 is rotatably connected to a movable base 102, and the other end of the first link 403 is rotatably connected to one end of the second link 404. The other end of the second link 404 is rotatably connected to a fixed base 101. Meanwhile, a mounting component is fixedly connected to the first link 403.

[0093] like Figure 11As shown, in some examples, the first link 403 includes a first straight portion 4031 and a second straight portion 4032, which are joined at an angle. The end of the first straight portion 4031 is rotatably connected to the movable base 102, and the end of the second straight portion 4032 is rotatably connected to the second link 404. Furthermore, a mounting component is fixedly connected to the first straight portion 4031.

[0094] It is understandable that the shape of the first link 403 and the position of the mounting component connecting the first link 403 can be set according to specific requirements to adapt to the sliding direction of the movable base 102 relative to the fixed base 101.

[0095] In some examples, an elastic member 405 is provided between the mounting component and the movable base 102. Specifically, the elastic member 405 may be a spring. One end of the elastic member 405 is connected to the movable base 102, and the other end is connected to the mounting component.

[0096] The elastic component 405 applies a certain preload to the mounting component and the linkage mechanism. This preload causes the linkage mechanism to tend to remain folded. When the driving component 401 drives the movable base 102 to slide relative to the fixed base 101, the linkage mechanism needs to overcome the preload applied by the elastic component 405 in order to extend.

[0097] Therefore, under the action of preload, the drive component 401 first drives the leg extension mechanism 202 to rotate by increasing its length. Only after the leg extension mechanism 202 rotates to its limit position will it drive the movable base 102 to slide relative to the fixed base 101. That is, in the process of the seat frame changing to a reclining position, it first changes to a TV position, and then changes from a TV position to a reclining position. Similarly, in the process of the seat frame changing to a sitting position, it first changes to a TV position, and then changes from a TV position to a sitting position.

[0098] In some examples, the movable base 102 is provided with a crossbeam 1021, one end of the elastic member 405 is connected to the crossbeam 1021, and the other end is connected to the mounting member.

[0099] In some examples, the seat frame also includes a back support assembly formed as a linkage mechanism, which includes a third link 501, a fourth link 502, a fifth link 503, and a backrest mounting component 504.

[0100] The backrest mounting component 504 is used to mount the backrest. When the seat changes from the TV position to the reclining position, the backrest mounting component 504 drives the backrest to rotate, thereby adjusting the backrest to a suitable reclining angle.

[0101] Furthermore, one end of the third link 501 is rotatably connected to the fixed base 101, and the other end is rotatably connected to the backrest mounting component 504; one end of the fourth link 502 is rotatably connected to the fixed base 101, and the other end is rotatably connected to the backrest mounting component 504; one end of the fifth link 503 is rotatably connected to the movable base 102, and the other end is rotatably connected to the third link 501.

[0102] It is understandable that when the movable base 102 slides relative to the fixed base 101, the movable base 102 will drive the fifth link 503 to move, thereby causing the entire back support assembly to rotate. Therefore, the angle adjustment process of the movable base 102 is linked to the angle adjustment process of the backrest mounting component 504, that is, the angle adjustment process of the seat cushion is linked to the angle adjustment process of the backrest.

[0103] It is worth noting that during the movement of the back support component, the back support component always remains within the range of the fixed base 101 and will not exceed the range of the fixed base 101. That is, the setting of the back support component can meet the requirement of zero wall contact of the seat frame.

[0104] This application provides a seating fixture, which includes the aforementioned seat frame;

[0105] The seat has a sitting position, a TV position, and a reclining position. When the seat is between the sitting position and the TV position, the slider 304 is in the sliding structure; when the seat is between the TV position and the reclining position, the slider 304 is in the locking structure.

[0106] In actual implementation, the seat can switch from a sitting position to a TV position. The driving component 401 drives the leg extension mechanism 202 and the linkage component 201 to rotate. The linkage component 201 drives the adjustment component 203 to move, so that the slider 304 slides to its limit position within the range of the slide groove 303. During this process, the first stop 306 contacts the lifting edge 309 of the adjustment component 203, and the second stop 307 disengages from the slot 308, preventing the rotation of the linkage component 201 from being affected, thus realizing the TV position of the seat. The seat can switch from the TV position to a reclining position. As the movable base 102 slides relative to the fixed base 101, the first stop 306 first contacts the guide edge 310 and gradually moves away from the adjustment component 203, making room for the adjustment component 203 to drop in height, so that the slider 304 can slide into the locking groove 305, and the second stop 307 gradually embeds into the slot 308, so that the leg extension mechanism 202 remains extended, thus realizing the reclining position of the seat.

[0107] The embodiments of this application have been described in detail above with reference to the accompanying drawings. However, this application is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of this application. Furthermore, unless otherwise specified, the embodiments and features described in the embodiments of this application can be combined with each other.

Claims

1. A seating frame, characterized in that, include: A base assembly comprising a fixed base (101) and a movable base (102), wherein the fixed base (101) and the movable base (102) are slidably connected; A leg support assembly, comprising a linkage component (201) and a leg telescopic mechanism (202), wherein the linkage component (201) and the leg telescopic mechanism (202) are capable of rotating synchronously to drive the leg telescopic mechanism (202) to perform telescopic movements; The adjustment assembly includes an adjustment component (203) rotatably connected to the linkage component (201), the adjustment component (203) having a sliding structure and a locking structure, and the movable base (102) having a slider (304); When the slider (304) slides within the range of the sliding structure, the linkage component (201) and the leg extension mechanism (202) can rotate; when the slider (304) slides within the range of the locking structure, the rotation of the linkage component (201) and the leg extension mechanism (202) is restricted.

2. The seat frame according to claim 1, characterized in that, The sliding structure is a groove (303), which extends toward the linkage component (201), and the slider (304) can slide within the range of the groove (303).

3. The seat frame according to claim 2, characterized in that, The locking structure is a locking groove (305), which is connected to the sliding groove (303). The extending direction of the locking groove (305) is at an angle to the extending direction of the sliding groove (303).

4. The seat frame according to claim 3, characterized in that, The fixed base (101) is provided with a first stop (306), which contacts the edge of the adjusting component (203).

5. The seat frame according to claim 4, characterized in that, The adjusting component (203) includes a lifting edge (309) parallel to the extending direction of the slide (303), and the first stop (306) restricts the slider (304) to be within the range of the slide (303) by contacting the lifting edge (309).

6. The seat frame according to claim 4, characterized in that, The adjustment component (203) includes a guide edge (310), and the first stop (306) guides the slider (304) from the locking groove (305) into the slide groove (303) by contacting the guide edge (310).

7. The seat frame according to claim 3, characterized in that, The adjusting component (203) is provided with a slot (308), and the movable base (102) is provided with a second stop (307). When the second stop (307) is inserted into the slot (308), the slider (304) is located within the range of the locking groove (305) to restrict the rotation of the linkage component (201).

8. The seat frame according to claim 1, characterized in that, The seat frame also includes a transmission assembly and a drive component (401). The drive component (401) is rotatably connected to the movable base (102). The fixed base (101) and the movable base (102) are connected through the transmission assembly. The transmission assembly and the leg support assembly are connected through the drive component (401). The drive component (401) is used to drive the linkage component (201) and the leg extension mechanism (202) to rotate, and also to drive the movable base (102) to slide relative to the fixed base (101).

9. The seat frame according to claim 8, characterized in that, The transmission assembly includes a linkage mechanism and a mounting component disposed on the linkage mechanism. The fixed base (101) and the movable base (102) are connected through the linkage mechanism. The mounting component is provided with a bending portion (4021) that bends outward. The driving component (401) is rotatably connected to the bending portion (4021).

10. The seat frame according to claim 9, characterized in that, The linkage mechanism includes a first link (403) and a second link (404) that are rotatably connected. The first link (403) is rotatably connected to the movable base (102), and the second link (404) is rotatably connected to the fixed base (101). The mounting component is fixedly connected to the first link (403).

11. The seat frame according to claim 10, characterized in that, The first connecting rod (403) includes a first straight section (4031) and a second straight section (4032), the first straight section (4031) and the second straight section (4032) are connected at an angle, the first straight section (4031) is rotatably connected to the movable base (102), the second straight section (4032) is rotatably connected to the second connecting rod (404), and the mounting component is fixedly connected to the first straight section (4031).

12. The seat frame according to claim 9, characterized in that, An elastic component (405) is provided between the mounting component and the movable base (102), and the mounting component and the movable base (102) are elastically connected through the elastic component (405).

13. The seat frame according to claim 12, characterized in that, The movable base (102) is provided with a crossbeam (1021), and the elastic component (405) elastically connects the mounting component and the crossbeam (1021).

14. The seat frame according to claim 1, characterized in that, When the seat is in a seated position, the linkage component (201) retracts into the range of the movable base (102), and the slider (304) is located within the range of the sliding structure; when the seat is in a TV position, the linkage component (201) extends beyond the range of the movable base (102), and the slider (304) is located at the end of the sliding structure away from the linkage component (201); when the seat is in a reclining position, the linkage component (201) extends beyond the range of the movable base (102), and the slider (304) is located within the range of the locking structure.

15. A seating arrangement, characterized in that, Includes the seat frame as described in any one of claims 1 to 14; The seat has a sitting position, a TV position, and a reclining position. When the seat is between the sitting position and the TV position, the slider (304) is located in the sliding structure. When the seat is between the TV position and the reclining position, the slider (304) is located in the locking structure.

16. The seating according to claim 15, characterized in that, The seating also includes a back support assembly, which includes a third link (501), a fourth link (502), a fifth link (503), and a backrest mounting component (504). One end of the third link (501) is rotatably connected to the fixed base (101), and the other end is rotatably connected to the backrest mounting component (504). One end of the fourth link (502) is rotatably connected to the fixed base (101), and the other end is rotatably connected to the backrest mounting component (504). One end of the fifth link (503) is rotatably connected to the movable base (102), and the other end is rotatably connected to the third link (501). When the movable base (102) moves out of the range of the fixed base (101), the movable base (102) causes the back support assembly to extend toward the leg support assembly.

Images