Seat frame and seat unit

Abstract

The utility model discloses a seat frame and a seat unit. The seat frame comprises a movable seat frame, the movable seat frame comprises a first side frame, a linkage mechanism and a handrail piece, and the first side frame comprises a first longitudinal beam and a main supporting piece connected to the lower end of the first longitudinal beam; the first longitudinal beam extends in the front-back direction, and the main supporting piece is used for being supported on the ground. The linkage mechanism is arranged on the side, facing the linkage mechanism, of the first longitudinal beam and can be switched between the sitting posture position and the lying posture position. The handrail piece is fixedly connected to the side, away from the linkage mechanism, of the first longitudinal beam. According to the seat frame, the main supporting piece of the first side frame is supported on the ground, the first longitudinal beam is connected with the main supporting piece, the first side frame is driven to provide a stable supporting effect on the linkage mechanism and the armrest piece, and therefore the design that the armrest piece is supported on the ground in a traditional product is replaced, and the whole seat frame is driven to be more stable; the shaking phenomenon is effectively reduced, and the use experience of consumers is further optimized.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of furniture, in particular to a seat frame and a seat unit. BACKGROUND

[0002] With the continuous improvement of people's quality of life, the comfort requirement of sofas and seats is also increasing, which has prompted a large number of functional movable seat products to emerge in the market, among which there are sofas or seats with multi-position conversion function, aiming to meet the comfort requirements in different scenes. However, in the existing technology, these movable seats generally rely on complex linkage mechanisms to achieve smooth conversion between various postures such as sitting position, TV position and lying position, and in order to balance aesthetics and practicality, designers often tend to directly connect the linkage mechanism to the armrest and directly use the armrest as the only ground support. This design ingeniously uses the armrest structure as the key component of connection and support, reduces the exposure of additional components, and improves the overall visual aesthetics. However, such design also leads to a significant defect: the armrest as the only support directly bears the weight and contacts the ground, and its structural strength and stability are often difficult to meet the complex mechanical requirements of the seat when changing posture, especially when frequently adjusting or bearing a large weight, the stability of the seat as a whole is significantly reduced, and shaking phenomenon is easy to occur, which not only weakens the practicality of the seat, but also reduces the safety and comfort of the consumer in an invisible way, seriously affecting the user experience of the consumer. CONTENT OF THE UTILITY MODEL

[0003] In order to overcome at least one of the defects of the prior art described above, the present application provides a seat frame, which is supported on the ground by the main support of the first side frame to provide stable support to the linkage mechanism and the armrest, so as to make the whole seat frame more stable and effectively reduce the occurrence of shaking phenomenon.

[0004] According to an embodiment of the present application, a seat frame comprises a movable seat frame, the movable seat frame comprising a first side frame, a linkage mechanism and an armrest, the first side frame comprising a first longitudinal beam and a main support connected to the lower end of the first longitudinal beam; the first longitudinal beam is arranged along the front and back direction, and the main support is used to support on the ground; the linkage mechanism is arranged on the side of the first longitudinal beam facing the linkage mechanism, and can be converted between a sitting position and a lying position; the armrest is fixedly connected to the side of the first longitudinal beam away from the linkage mechanism.

[0005] In the seat frame, the first side frame is supported on the ground by the main support of the first side frame, and the first longitudinal beam of the first side frame is fixedly connected with the main support, so that the first side frame can provide stable support for the linkage mechanism and the armrest arranged on the first longitudinal beam, thereby replacing the design of supporting the armrest on the ground in the conventional product, and the overall seat frame is more stable, the shaking phenomenon is effectively reduced, and the use experience of the consumer is further optimized.

[0006] According to some embodiments of the present application, the first longitudinal beam is connected with at least one hanging ear, and the armrest is fixedly connected with the hanging ear.

[0007] According to some embodiments of the present application, the lower end of the armrest is connected with a plurality of supporting legs arranged in the front-rear direction for supporting on the ground.

[0008] According to some embodiments of the present application, the rear end of the first longitudinal beam is connected with a first auxiliary beam extending in the height direction, and the first auxiliary beam is fixedly connected with the rear end of the armrest.

[0009] According to some embodiments of the present application, a fixed seat frame is further included, and the linkage mechanism is provided with a second side frame on the side facing the fixed seat frame, and the second side frame is fixedly connected with the side of the fixed seat frame facing the linkage mechanism.

[0010] According to some embodiments of the present application, the second side frame is provided with a first connecting piece, and the fixed seat frame is provided with a second connecting piece on the side facing the linkage mechanism or the fixed seat frame, and the second connecting piece can be connected with the first connecting piece or the second connecting piece.

[0011] According to some embodiments of the present application, the linkage mechanism includes at least two mechanical stretching devices arranged in the transverse direction, and the mechanical stretching devices are connected with a third side frame on the side facing each other, and the third side frame is used for fixedly connecting the two mechanical stretching devices.

[0012] According to some embodiments of the present application, an auxiliary support is further included, and the auxiliary support is arranged at the lower end of the second side frame and / or the third side frame.

[0013] According to some embodiments of the present application, a fixed support is further included, and the fixed support is arranged at the lower end of the fixed seat frame.

[0014] Based on the same inventive concept, the present application further provides a seat unit including the seat frame as described above.

[0015] In summary, the seat frame provided by the present application has the following technical effects:

[0016] The first side frame is supported on the ground by the main support, and the first longitudinal beam of the first side frame is fixedly connected with the main support, so that the first side frame drives the linkage mechanism and the handrail mounted on the first longitudinal beam to provide stable support, thereby replacing the design of supporting the handrail on the ground in the conventional product, and further driving the whole seat frame to be more stable, effectively reducing the occurrence of shaking, and further optimizing the use experience of the consumer. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 FIG. 1 is a structural schematic diagram of a seat frame according to an embodiment of the present application;

[0018] Figure 2 FIG. 2 is a structural schematic diagram of a movable seat frame according to an embodiment of the present application;

[0019] Figure 3 FIG. 3 is a structural schematic diagram of a first side frame according to an embodiment of the present application;

[0020] Figure 4 FIG. 4 is another structural schematic diagram of the first side frame according to an embodiment of the present application;

[0021] Figure 5 FIG. 5 is another structural schematic diagram of the movable seat frame according to an embodiment of the present application;

[0022] Figure 6 FIG. 6 is a left view of a mechanical stretching device half according to an embodiment of the present application;

[0023] Figure 7 FIG. 7 is a right view of the mechanical stretching device half according to an embodiment of the present application;

[0024] Figure 8 FIG. 8 is a structural schematic diagram of a fixed seat frame according to an embodiment of the present application;

[0025] Figure 9 FIG. 9 is another structural schematic diagram of the fixed seat frame according to an embodiment of the present application.

[0026] In the drawings, the reference signs have the following meanings:

[0027] 100, movable seat frame; 110, first side frame; 111, first longitudinal beam; 112, main support member; 113, hanger member; 114, first auxiliary beam; 115, connecting portion; 120, linkage mechanism; 121, mechanical extension device; 122, mechanical extension device half; 123, fixing plate; 124, fixing cross beam; 125, electrical actuating device; 126, seat assembly; 127, backrest assembly; 128, leg assembly; 130, armrest member; 131, foot member; 140, second side frame; 141, first connecting member; 142, auxiliary support member; 143, second longitudinal beam; 144, second auxiliary beam; 200, fixed seat frame; 201, second connecting member; 202, fixed support member; 203, third longitudinal beam; 204, third auxiliary beam. DETAILED DESCRIPTION

[0028] In order to better understand and implement, the technical solutions in the embodiments of the present application will be clearly and completely described below in combination with the accompanying drawings in the embodiments of the present application.

[0029] In the description of the present application, it should be noted that the orientations or positional relationships indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like are based on the orientations or positional relationships shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0030] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs. The terms used in the specification of the present application are only for the purpose of describing the specific embodiments of the present application, and are not intended to limit the present application.

[0031] Reference is made to Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5The application discloses a seat frame which is applied to a seat unit. The seat frame comprises a movable seat frame 100, the movable seat frame 100 comprises a first side frame 110, a linkage mechanism 120 and an armrest 130, in some embodiments, the first side frame 110 comprises a first longitudinal beam 111 and a main support 112 connected to the lower end of the first longitudinal beam 111; the first longitudinal beam 111 is arranged to extend along the front-rear direction, and the main support 112 is used for supporting on the ground; the linkage mechanism 120 is arranged on the side of the first longitudinal beam 111 facing the linkage mechanism 120 and can be transformed between a sitting position and a lying position; and the armrest 130 is fixedly connected to the side of the first longitudinal beam 111 away from the linkage mechanism 120. Preferably, the main support 112 of the first side frame 110 is supported on the ground, and the first longitudinal beam 111 of the first side frame 110 is fixedly connected with the main support 112, so as to drive the first side frame 110 to provide stable support to the linkage mechanism 120 and the armrest 130 assembled on the first longitudinal beam 111, thereby replacing the design that the armrest 130 is supported on the ground in the conventional product, and further driving the whole seat frame to be more stable, effectively reducing the occurrence of shaking phenomenon and further optimizing the use experience of consumers.

[0032] Optionally, the first longitudinal beam 111 and the main support 112 are both made of a strip-shaped square tube, so that the whole first side frame 110 has higher structural strength and can better provide support to the linkage mechanism 120 and the armrest 130; optionally, the first longitudinal beam 111 and the main support 112 can be fixedly connected through welding, threaded connection, riveting, insertion and the like; optionally, the lower end of the first longitudinal beam 111 is connected with a plurality of main supports 112, as shown in Figure 3 、 Figure 4 and Figure 5 In the embodiment, the lower end of the first longitudinal beam 111 is connected with two main supports 112, and the two main supports 112 are arranged on the lower end of the first longitudinal beam 111 along the front-rear direction, so that the main supports 112 can more stably support the first longitudinal beam 111.

[0033] In some embodiments, the first longitudinal beam 111 is connected with at least one hanging ear 113, and the armrest 130 is fixedly connected to the hanging ear 113. Preferably, the armrest 130 is fixedly connected with the first longitudinal beam 111 through the hanging ear 113, so that the first longitudinal beam 111 provides reliable support to the armrest 130 through the hanging ear 113; optionally, the number of the hanging ears 113 can be multiple, and the multiple hanging ears 113 are arranged along the front-rear direction; as shown in Figure 3 、 Figure 4 andFigure 5 In the embodiment, two of the lug members 113 are arranged on the first longitudinal beam 111 in the front-rear direction, and are fixedly connected to the first longitudinal beam 111 by welding, screwing, riveting, inserting or the like. The free ends of the lug members 113 extend to the bottom of the handrail member 130 in the lateral direction away from the linkage mechanism 120. The handrail member 130 is fixedly connected to the handrail member 130 by screwing, riveting, inserting or the like. The first longitudinal beam 111 supports and fixes the handrail member 130 through the lug members 113, so as to stably connect the handrail member 130 and the first side frame 110.

[0034] Optionally, the handrail member 130 is made by injection molding, i.e., the handrail member 130 is an independent component and can be directly assembled to the lug members 113 without complicated assembly, thereby effectively improving the production efficiency. The handrail member 130 made by injection molding has good physical properties and chemical stability, can provide the service life of the seat frame, and is easy to be subjected to post-processing such as spraying, electroplating and printing, so as to meet different aesthetic and functional requirements.

[0035] In some embodiments, the lower end of the handrail member 130 can not be provided with the leg members 131, so that the handrail member 130 is directly supported and fixed by the first longitudinal beam 111 through the lug members 113. Preferably, the lower end of the handrail member 130 is connected to a plurality of leg members 131 for supporting on the ground, and the leg members 131 are arranged in the front-rear direction. In this way, the leg members 131 and the first side frame 110 jointly support the handrail member 130, thereby further improving the stability of the handrail member 130. Figure 1 、 Figure 2 and Figure 3 In the embodiment, the number of the leg members 131 is two, and the two leg members 131 are respectively arranged at the front and rear ends of the handrail member 130. Further, the spacing between the two main support members 112 is less than the spacing between the two leg members 131, and the first side frame 110 is located between the handrail member 130 and the linkage mechanism 120. In this way, the main support members 112 can be effectively hidden, so that the seat unit made of the seat frame is more beautiful, thereby meeting the pursuit of beauty by consumers.

[0036] In some embodiments, the rear end of the first longitudinal beam 111 is connected with a first auxiliary beam 114 extending in the height direction, and the first auxiliary beam 114 is fixedly connected with the rear end of the armrest 130. Preferably, the armrest 130 is fixedly connected by the first longitudinal beam 111 and the first auxiliary beam 114, so as to improve the reliability of the connection between the armrest 130 and the first side frame 110. Further, referring to Figure 3 、 Figure 4 and Figure 5 In the present embodiment, the main support 112 provided at the front end of the first longitudinal beam 111 extends upward to form a connecting portion 115, and the connecting portion 115 is fixedly connected with the armrest 130. In this way, the first auxiliary beam 114 and the connecting portion 115 are respectively fixedly connected with the armrest 130 at the front and rear ends of the first longitudinal beam 111, and the middle part of the first longitudinal beam 111 is fixedly connected with the armrest 130 by the two hanging ears 113. In this way, the first side frame 110 provides sufficient support to the armrest 130, so that the armrest 130 and the first side frame 110 form a stable whole, effectively reducing the shaking of the armrest 130, and further optimizing the use experience of the consumer.

[0037] In some embodiments, the seat frame further comprises a fixed seat frame 200, that is, the seat frame simultaneously has a movable seat frame 100 and a fixed seat frame 200, and the fixed seat frame 200 is free of the linkage mechanism 120. Preferably, the side of the linkage mechanism 120 facing the fixed seat frame 200 is provided with a second side frame 140, and the second side frame 140 is fixedly connected with the side of the fixed seat frame 200 facing the linkage mechanism 120. Taking a two-person seat unit as an example, referring to Figure 1 The two-person seat unit has one movable seat frame 100 and one fixed seat frame 200. Preferably, the first side frame 110 is arranged on the side of the linkage mechanism 120 away from the fixed seat frame 200, the armrest 130 is fixedly connected on the side of the first side frame 110 away from the linkage mechanism 120, the second side frame 140 is arranged on the side of the linkage mechanism 120 facing the fixed seat frame 200, and the second side frame 140 is fixedly connected with the fixed seat frame 200 by screwing, riveting, inserting or the like, so as to stably connect the movable seat frame 100 and the fixed seat frame 200, and connect the movable seat frame 100 and the fixed seat frame 200 in parallel along the transverse direction to form a whole, thereby being applicable to a two-person seat unit.

[0038] In some embodiments, at least one of the fixed seat frames 200 is arranged in the seat frame. Optionally, the number of the fixed seat frames 200 can be adjusted accordingly to make the seat frame into a three-seater, a four-seater, a five-seater, or a longer seat unit. Preferably, the first connecting member 141 is arranged on the second side frame 140; the second connecting member 201 is arranged on the side of the fixed seat frame 200 facing the linkage mechanism 120 or the fixed seat frame 200 adjacent to each other, and the second connecting member 201 can be connected with the first connecting member 141 or the second connecting member 201 adjacent to each other. Optionally, the second connecting member 201 and the first connecting member 141 or the second connecting member 201 adjacent to each other can be connected by pin connection, buckle connection, bolt connection, etc. The innovation of the present application is not in the specific formation or connection method of the connecting member, which will not be listed one by one here. Taking a three-seater seat unit as an example, the three-seater seat unit has one movable seat frame 100 (hereinafter referred to as movable frame A for convenience) and two fixed seat frames 200 (hereinafter referred to as fixed frame B and fixed frame C for convenience), wherein the movable frame A, the fixed frame B and the fixed frame C are arranged in the transverse direction, i.e. the movable frame A and the fixed frame B are adjacent to each other, the fixed frame B and the fixed frame C are adjacent to each other, and the movable frame A at the end of the arrangement has a linkage mechanism 120 capable of being independently transformed between a sitting position and a lying position. The first side frame 110 is arranged on the side of the linkage mechanism 120 away from the fixed seat frame 200, the armrest member 130 is fixedly connected to the side of the first side frame 110 away from the linkage mechanism 120, the second side frame 140 is arranged on the side of the linkage mechanism 120 facing the fixed frame B, the first connecting member 141 on the second side frame 140 is connected with the second connecting member 201 on the side of the fixed frame B facing the movable frame A, and the fixed frame B and the fixed frame C have respective second connecting members 201 on their opposite sides. The two second connecting members 201 are connected with each other, so that the movable frame A, the fixed frame B and the fixed frame are connected in the transverse direction. Further, the number of the fixed seat frames 200 can be increased or decreased according to the required length, improving the expandability of the seat unit. Therefore, the excess fixed seat frames 200 can be removed by disconnecting the second connecting member 201 from the first connecting member 141 or the second connecting member 201 adjacent to each other, or the fixed seat frames 200 to be added can be arranged in the transverse direction with other fixed seat frames 200 and / or movable seat frames 100, and the second connecting member 201 is connected with the first connecting member 141 or the second connecting member 201 adjacent to each other.

[0039] Further, referring to Figure 2The second side frame 140 comprises a second longitudinal beam 143 extending in the front-rear direction and a second auxiliary beam 144 extending in the height direction, the second auxiliary beam 144 is arranged at the rear end of the second longitudinal beam 143, further, the number of the first connecting members 141 is multiple, which are distributed on the second longitudinal beam 143 and the second auxiliary beam 144, see Figure 2 The second longitudinal beam 143 and the second auxiliary beam 144 each have one first connecting member 141, accordingly, the fixed seat frame 200 comprises a third longitudinal beam 203 extending in the front-rear direction and a third auxiliary beam 204 extending in the height direction, the third auxiliary beam 204 is arranged at the rear end of the third longitudinal beam 203, see Figure 2 The third longitudinal beam 203 and the third auxiliary beam 204 each have one second connecting member 201, thus, the first connecting member 141 on the second longitudinal beam 143 is fixedly connected with the second connecting member 201 on the third longitudinal beam 203, and the first connecting member 141 on the second auxiliary beam 144 is fixedly connected with the second connecting member 201 on the third auxiliary beam 204, so as to realize the stable connection between the movable seat frame 100 and the fixed seat frame 200.

[0040] See Figure 8 And Figure 9 The fixed seat frame 200 comprises two groups of third longitudinal beams 203 and third auxiliary beams 204, the front-rear ends of the two third longitudinal beams 203 are fixedly connected through connecting rod members, optionally, the upper side of the third longitudinal beam 203 is further provided with a frame structure for forming a seat part or supporting a seat cushion, the innovation point of the present application is not in the specific forming mode of the frame structure, which will not be listed one by one here.

[0041] In some embodiments, the seat frame can be composed of the movable seat frame 100 only, which can be applied to a single seat unit, a double seat unit or a multi-seat unit. Optionally, when the movable seat frame 100 is applied to a double seat unit or a multi-seat unit, the linkage mechanism 120 comprises at least two mechanical stretching devices 121 arranged in a transverse direction, and a third side frame is connected to a side of each of the mechanical stretching devices 121 facing each other, for fixing and connecting the two mechanical stretching devices 121. Taking a three-seat unit as an example, the three-seat unit has three mechanical stretching devices 121, which are defined as device A, device B and device C for convenience, and are arranged in a transverse direction, and each of the mechanical stretching devices 121 can be independently switched between a sitting position and a lying position. Device A and device C are located at both ends of the arrangement, and therefore a side of device A and device C away from device B is provided with the first side frame 110, and a side of the first side frame 110 away from the mechanical stretching devices 121 is fixedly connected with the armrest 130. Device A and device B have respective third side frames on their mutually facing sides, and correspondingly, device C and device B also have respective third side frames on their mutually facing sides. The four third side frames are connected with each other, so that device A, device B and device C are connected in parallel in a transverse direction. The two third side frames adjacent to each other can be connected by riveting, screwing, inserting or the like. This modular construction can increase or decrease the number of mechanical stretching devices 121, i.e. the number of seats, according to the required length, thereby improving the expandability of the seat unit. That is, the seat unit can also be adjusted to a double seat unit, a four-seat unit, a five-seat unit or the like according to the requirements. When the seat unit is constructed as a single seat unit, the seat unit comprises only one set of mechanical stretching devices 121, and a pair of first side frames 110 is arranged on both sides of the mechanical stretching devices 121, and the armrest 130 is directly fixedly connected with the first side frames 110.

[0042] Further, the seat frame is formed by the movable seat frame 100 and the fixed seat frame 200, wherein the linkage mechanism 120 comprises at least one transversely arranged mechanical stretching device 121, the mechanical stretching device 121 is arranged transversely to the fixed seat frame 200, the mechanical stretching device 121 arranged at the end of the transverse arrangement has the first side frame 110, the first side frame 110 is arranged outside the mechanical stretching device 121, and the side of the first side frame 110 away from the mechanical stretching device 121 is fixedly connected with the armrest 130, if another mechanical stretching device 121 is adjacent to the mechanical stretching device 121, then the two mechanical stretching devices 121 adjacent to each other have respective third side frames on the sides facing each other, and the two third side frames are connected with each other, so that the two mechanical stretching devices 121 adjacent to each other are connected transversely side by side; if the fixed seat frame 200 is adjacent to the mechanical stretching device 121, then the side of the mechanical stretching device 121 facing the fixed seat frame 200 is provided with the second side frame 140, the first connecting piece 141 on the second side frame 140 is connected with the second connecting piece 201 on the side of the fixed seat frame 200 facing the mechanical stretching device 121, so that the fixed seat frame 200 and the mechanical stretching device 121 adjacent to each other are connected transversely side by side; further, the number of the fixed seat frame 200 and / or the mechanical stretching device 121 can be increased or decreased according to the required length, which improves the expandability of the seat unit.

[0043] Further, the third side frame can be provided with the first connecting piece 141, and the two third side frames adjacent to each other are fixedly connected through the first connecting piece 141, that is, the mechanical stretching device 121 can also be fixedly connected with the fixed seat frame 200 through the third side frame; preferably, the second side frame 140 and the third side frame have the same structure, so as to optimize the structure of the movable seat frame 100 and improve the universality of the parts.

[0044] In some embodiments, further comprising a fixed support 202 arranged at the lower end of the fixed seat frame 200. Thus, referring to Figure 1 、 Figure 8 and Figure 9, the seat frame has a movable seat frame 100 and a fixed seat frame 200, the fixed seat frame 200 is supported on the ground by the fixed support 202, and the fixed seat frame 200 is driven to provide stable support to the side of the linkage mechanism 120 away from the first side frame 110 through the second side frame 140, and the linkage mechanism 120 provides stable support to the side facing the first side frame 110, thereby driving the overall seat frame to be more stable, effectively reducing shaking, and optimizing the use experience of consumers.

[0045] In some embodiments, an auxiliary support 142 is further included, which is arranged at the lower end of the second side frame 140 and / or the third side frame. Thus, referring to Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 and Figure 5 , the side of the linkage mechanism 120 facing the second side frame 140 is supported on the ground by the auxiliary support 142 at the lower end of the second side frame 140, so that the side of the linkage mechanism 120 away from the first side frame 110 can also obtain stable support, thereby improving the overall stability of the seat frame and effectively reducing shaking. Similarly, the side of the mechanical stretching device 121 facing the third side frame is supported on the ground by the auxiliary support 142 at the lower end of the third side frame, and especially when the seat frame is only composed of the movable seat frame 100, the mechanical stretching device 121 located in the middle of the arrangement has the third side frame on both sides. Thus, the third side frame is supported on the ground by the auxiliary support 142 at the lower end of the third side frame, thereby driving the third side frame to provide stable support to the mechanical stretching device 121, so that the overall seat frame is more stable and effectively reduces shaking.

[0046] In some embodiments, a seat unit includes a seat frame as described above. Referring to Figure 1 , the seat frame of the seat unit is composed of the movable seat frame 100 and the fixed seat frame 200, the movable seat frame 100 has the linkage mechanism 120, the linkage mechanism 120 has the mechanical stretching device 121 capable of being transformed between at least a sitting position and a lying position, referring to Figure 4, the mechanical stretching device 121 comprises two mechanical stretching device halves 122 which are symmetrically arranged on the left and right sides. Each mechanical stretching device half 122 has a fixed plate 123 which extends longitudinally along the front-rear direction of the movable seat, and each mechanical stretching device half 122 is assembled on the side of the first longitudinal beam 111 facing the mechanical stretching device 121 by means of its respective fixed plate 123, or each mechanical stretching device half 122 is assembled on the side of the second side frame 140 or the third side frame 141 facing the mechanical stretching device 121 by means of its respective fixed plate 123. Each fixed plate 123 is attached to a common fixed crossbeam 124 at the backrest side, i.e. the rear end of the seat frame, by means of a connecting rod, and the main support 112 and the auxiliary support 142 are also attached to the fixed crossbeam 124 by means of respective connecting rods. Preferably, referring to Figure 6 and Figure 7 , the mechanical stretching device 121 further comprises a linear electric actuator 125, a seat assembly 126, a backrest assembly 127 pivotally connected to the rear end of the seat assembly 126, and a leg assembly 128 pivotally connected to the front end of the seat assembly 126. When changing between the sitting position and the lying position, the linear electric actuator 125 can drive the leg assembly 128 to stretch forward, while driving the seat assembly 126 to move forward, and the backrest assembly 127 has a component of forward movement and no component of backward movement at the most rear end point, so that the seat unit is suitable for "zero gravity", "zero wall", and other seat units. The innovation of the present application is not in the specific structure of the mechanical stretching device 121, which will not be listed one by one here.

[0047] The technical means disclosed in the present application scheme is not limited to the technical means disclosed in the above-mentioned embodiments, but also includes the technical solutions composed of any combination of the above technical features. It should be noted that for ordinary skilled persons in the art, without departing from the principles of the present application, a number of improvements and refinements can be made, which are also considered within the protection scope of the present application.

Claims

1. A seat frame comprising a movable seat frame (100), the movable seat frame (100) comprising a first side frame (110), a linkage mechanism (120) and an armrest (130), characterized in that: the first side frame (110) comprises a first longitudinal beam (111) and a main support (112) connected to a lower end of the first longitudinal beam (111); the first longitudinal beam (111) is arranged to extend in a front-rear direction, and the main support (112) is configured to be supported on the ground; the linkage mechanism (120) is arranged on a side of the first longitudinal beam (111) facing the linkage mechanism (120) and is configured to be transformed between a sitting position and a lying position; the armrest (130) is fixedly connected to a side of the first longitudinal beam (111) facing away from the linkage mechanism (120).

2. The seat frame of claim 1, wherein: at least one hanging ear (113) is connected to the first longitudinal beam (111), and the armrest (130) is fixedly connected to the hanging ear (113).

3. The seat frame of claim 1, wherein: a plurality of supporting legs (131) for supporting on the ground are connected to a lower end of the armrest (130) and are arranged in a front-rear direction.

4. The seat frame of claim 1, wherein: a first auxiliary beam (114) extending in a height direction is connected to a rear end of the first longitudinal beam (111), and the first auxiliary beam (114) is fixedly connected to a rear end of the armrest (130).

5. The seat frame of claim 1, wherein: a fixed seat frame (200) is further included, and a second side frame (140) is arranged on a side of the linkage mechanism (120) facing the fixed seat frame (200), and the second side frame (140) is fixedly connected to a side of the fixed seat frame (200) facing the linkage mechanism (120).

6. The seat frame of claim 5, wherein: a first connecting piece (141) is arranged on the second side frame (140); a second connecting piece (201) is arranged on a side of the fixed seat frame (200) facing the linkage mechanism (120) or the fixed seat frame (200) adjacent to each other, and the second connecting piece (201) is configured to be connected to the first connecting piece (141) or the second connecting piece (201) adjacent to each other.

7. The seat frame of claim 6, wherein: the linkage mechanism (120) comprises at least two mechanical stretching devices (121) arranged in a transverse direction, and a third side frame is connected to a side of the mechanical stretching device (121) facing the mechanical stretching device (121) adjacent to each other, and the third side frame is configured to fixedly connect the two mechanical stretching devices (121) adjacent to each other.

8. The seat frame of claim 7, wherein: an auxiliary support (142) is further included, and the auxiliary support (142) is arranged at a lower end of the second side frame (140) and / or the third side frame.

9. The seat frame of claim 5, wherein: a fixed support (202) is further included, and the fixed support (202) is arranged at a lower end of the fixed seat frame (200).

10. A seating unit characterized by, a seat frame according to any one of claims 1-9 is included.

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