Seat frame and seat unit

Abstract

The invention 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 armrest piece is fixedly connected to the side, away from the linkage mechanism, of the first seat frame. 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, and in particular to a seat frame and a seat unit. Background Art

[0002] As people's quality of life continues to improve, the comfort requirements for sofas and seats are also increasing. This has led to the emergence of many functional movable seat products on the market, including sofas or seats with multi-position transformation functions, which are designed to meet the comfort requirements in different scenarios. However, in the existing technical implementation, these movable seats generally rely on complex linkage mechanisms to achieve smooth transitions between various postures such as sitting position, TV position, and lying position. At the same time, in order to take into account both aesthetics and practicality, designers tend to directly connect the linkage mechanism to the armrest and directly use the armrest as the only ground support. This design cleverly uses the armrest structure as a key component for connection and support, reduces the exposure of additional components, and enhances the overall visual beauty. However, such a design also leads to a significant defect: the armrest, as the only supporting member, directly bears the weight and contacts the ground. Its structural strength and stability are often difficult to meet the complex mechanical requirements generated when the seat changes posture. Especially when it is frequently adjusted or carries a large weight, the overall stability of the seat is significantly reduced and it is prone to shaking. This not only weakens the practicality of the seat, but also invisibly reduces consumers' sense of safety and comfort, seriously affecting consumers' user experience. Summary of the invention

[0003] In order to overcome at least one of the defects described in the above-mentioned prior art, the present application provides a seat frame, which is supported on the ground by a main support member of the first side frame to provide a stable support for the linkage mechanism and the armrest, thereby making the overall seat frame more stable and effectively reducing the occurrence of shaking.

[0004] A chair frame according to an embodiment of the present application includes a movable seat frame, which includes a first side frame, a linkage mechanism and an armrest member, the first side frame includes a first longitudinal beam and a main support member connected to the lower end of the first longitudinal beam; the first longitudinal beam is extended in the front-to-back direction, and the main support member is used to support on the ground; the linkage mechanism is arranged on a side of the first longitudinal beam facing the linkage mechanism, and can be transformed between a sitting position and a lying position; the armrest member is fixedly connected to the side of the first seat frame away from the linkage mechanism.

[0005] In this seat frame, it is supported on the ground by the main support member of the first side frame, and the first longitudinal beam of the first side frame is fixedly connected to the main support member, driving the first side frame to provide a stable supporting effect on the linkage mechanism and the armrest member assembled on the first longitudinal beam, thereby replacing the design in traditional products where the armrest member is supported on the ground, and further driving the overall seat frame to be more stable, effectively reducing the occurrence of shaking phenomena, and further optimizing the use experience of consumers.

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

[0007] According to some embodiments of the present application, several support feet for supporting on the ground are connected to the lower end of the armrest member, and the support feet are arranged in the front-rear direction.

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

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

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

[0011] According to some embodiments of the present application, the linkage mechanism includes at least two mechanical extension devices arranged horizontally. A third side frame is connected to the side of the mechanical extension device facing the adjacent mechanical extension device, and the third side frame is used to fixedly connect the two adjacent mechanical extension devices.

[0012] According to some embodiments of the present application, it further includes an auxiliary support member, and the auxiliary support member 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, it further includes a fixed support member, and the fixed support member is arranged at the lower end of the fixed seat frame.

[0014] Based on the same inventive concept, the present application also proposes 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] It is supported on the ground by the main support member of the first side frame, and the first longitudinal beam of the first side frame is fixedly connected to the main support member, driving the first side frame to provide a stable supporting effect on the linkage mechanism and the armrest member assembled on the first longitudinal beam, thereby replacing the design in traditional products where the armrest member is supported on the ground, and further driving the overall seat frame to be more stable, effectively reducing the occurrence of shaking phenomena, and further optimizing the use experience of consumers. BRIEF DESCRIPTION OF THE DRAWINGS

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

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

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

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

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

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

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

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

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

[0026] Among them, the meanings of the reference numerals are as follows:

[0027] 100, movable seat frame; 110, first side frame; 111, first longitudinal beam; 112, main support member; 113, hanging ear member; 114, first auxiliary beam; 115, connecting portion; 120, linkage mechanism; 121, mechanical extension device; 122, half of mechanical extension device; 123, fixing plate; 124, fixing cross beam; 125, electroactive device; 126, seat component; 127, backrest component; 128, leg component; 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 implementation manners

[0028] For better understanding and implementation, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application.

[0029] In the description of the present application, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present application.

[0030] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which this application belongs. The terms used in the description of this application herein are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0031] Refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5, this application discloses a seat frame which is applied to a seat unit. The seat frame includes a movable seat frame 100, and the movable seat frame 100 includes a first side frame 110, a linkage mechanism 120 and an armrest member 130. In some embodiments, the first side frame 110 includes a first longitudinal beam 111 and a main support member 112 connected to the lower end of the first longitudinal beam 111; the first longitudinal beam 111 extends in the front-rear direction, and the main support member 112 is used to support on the ground; the linkage mechanism 120 is disposed 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; the armrest member 130 is fixedly connected to the side of the first seat frame facing away from the linkage mechanism 120. Preferably, the main support member 112 of the first side frame 110 supports on the ground, and the first longitudinal beam 111 of the first side frame 110 is fixedly connected to the main support member 112, driving the first side frame 110 to provide a stable supporting effect on the linkage mechanism 120 and the armrest member 130 assembled on the first longitudinal beam 111, thereby replacing the design of using the armrest member 130 to support on the ground in traditional products, and further driving the overall seat frame to be more stable, effectively reducing the occurrence of shaking phenomenon, and further optimizing the use experience of consumers.

[0032] Optionally, both the first longitudinal beam 111 and the main support member 112 are made of strip-shaped square tubes, driving the overall first side frame 110 to have higher structural strength, so as to better provide a supporting effect on the linkage mechanism 120 and the armrest member 130; optionally, the first longitudinal beam 111 and the main support member 112 can be fixedly connected by means of welding, threaded connection, riveting, plugging, etc.; optionally, a plurality of the main support members 112 are connected to the lower end of the first longitudinal beam 111, refer to Figure 3 , Figure 4 and Figure 5 , in this embodiment, two main support members 112 are connected to the lower end of the first longitudinal beam 111, and the two main support members 112 are arranged in the front-rear direction at the lower end of the first longitudinal beam 111, so that the main support member 112 can more stably support the first longitudinal beam 111.

[0033] In some embodiments, at least one hanging ear member 113 is connected to the first longitudinal beam 111, and the armrest member 130 is fixedly connected to the hanging ear member 113. Preferably, the armrest member 130 is fixedly connected to the first longitudinal beam 111 through the hanging ear member 113, so that the first longitudinal beam 111 provides a reliable supporting force to the armrest member 130 through the hanging ear member 113; optionally, the number of the hanging ear members 113 can be multiple, and the multiple hanging ear members 113 are arranged in the front-rear direction; refer to Figure 3 , Figure 4 and Figure 5, in this embodiment, the two lugs 113 are arranged on the first longitudinal beam 111 in the front-rear direction, and the lugs 113 are fixedly connected to the first longitudinal beam 111 by means of welding, threaded connection, riveting, plugging, etc. The free end of the lug 113 extends in the lateral direction away from the linkage mechanism 120 to the bottom of the armrest 130. The armrest 130 is fixedly connected to the armrest 130 by means of threaded connection, riveting, plugging, etc., so that the first longitudinal beam 111 supports and fixes the armrest 130 through the lugs 113, so as to realize the stable connection between the armrest 130 and the first side frame 110.

[0034] Optionally, the armrest 130 is made by an injection molding process, that is, the armrest 130 is an independent component and can be directly assembled on the lugs 113 without complex assembly, effectively improving production efficiency. At the same time, the armrest 130 made by the injection molding process has good physical properties and chemical stability, can provide the service life of the seat frame, and is easy to perform post-treatment such as spraying, electroplating, printing, etc. to meet different aesthetic and functional requirements.

[0035] In some embodiments, the feet 131 may not be provided at the lower end of the armrest 130, so that the armrest 130 is directly supported and fixed by the first longitudinal beam 111 through the lugs 113; preferably, several feet 131 for supporting on the ground are connected to the lower end of the armrest 130, and the feet 131 are arranged in the front-rear direction. Thus, the feet 131 and the first side frame 110 jointly support the armrest 130, further improving the stability of the armrest 130; refer to Figure 1 , Figure 2 and Figure 3 , in this embodiment, the number of the feet 131 is two, and the two feet 131 are respectively arranged at the front and rear ends of the armrest 130; further, the distance between the two main support members 112 is smaller than the distance between the two feet 131, and the first side frame 110 is located between the armrest 130 and the linkage mechanism 120. Thus, the main support members 112 can be effectively hidden, making the seat unit made of this seat frame more beautiful and meeting the consumers' pursuit of beauty.

[0036] In some embodiments, a first auxiliary beam 114 extending in the height direction is connected to the rear end of the first longitudinal beam 111, and the first auxiliary beam 114 is fixedly connected to the rear end of the armrest member 130. Preferably, the first longitudinal beam 111 and the first auxiliary beam 114 are jointly used to fixedly connect the armrest member 130 to improve the reliability of the connection between the armrest member 130 and the first side frame 110; further, referring to Figure 3 , Figure 4 and Figure 5 , in this embodiment, a connecting portion 115 is formed by the main support member 112 provided at the front end of the first longitudinal beam 111 extending upward, and the connecting portion 115 is fixedly connected to the armrest member 130. In this way, the first auxiliary beam 114 and the connecting portion 115 respectively fixedly connect the armrest member 130 at the front and rear ends of the first longitudinal beam 111. At the same time, the middle part of the first longitudinal beam 111 is fixedly connected to the armrest member 130 through two hanging ear members 113. In this way, the first side frame 110 provides a sufficient large supporting force to the armrest member 130, so that the armrest member 130 and the first side frame 110 form a stable whole, effectively reducing the shaking of the armrest member 130 and further optimizing the use experience of consumers.

[0037] In some embodiments, the seat frame further includes a fixed seat frame 200, that is, the seat frame has both a movable seat frame 100 and a fixed seat frame 200 at the same time. There is no linkage mechanism 120 in the fixed seat frame 200. Preferably, a second side frame 140 is provided on the side of the linkage mechanism 120 facing the fixed seat frame 200, and the second side frame 140 is fixedly connected to the side of the fixed seat frame 200 facing the linkage mechanism 120. Now, taking a two-person seat unit as an example for explanation, referring to Figure 1 , this two-person seat unit has one movable seat frame 100 and one fixed seat frame 200. Preferably, the first side frame 110 is provided on the side of the linkage mechanism 120 facing away from the fixed seat frame 200, the armrest member 130 is fixedly connected to the side of the first side frame 110 facing away from the linkage mechanism 120, the second side frame 140 is provided on the side of the linkage mechanism 120 facing the fixed seat frame 200, and the second side frame 140 and the fixed seat frame 200 are fixedly connected by means of threaded connection, riveting, plugging, etc. to realize the stable connection between the movable seat frame 100 and the fixed seat frame 200, so that the movable seat frame 100 and the fixed seat frame 200 are connected side by side in the horizontal direction and jointly form a whole, so as to be applicable to a two-person seat unit.

[0038] In some embodiments, at least one of the fixed seat frames 200 is provided in the seat frame. Optionally, the number of the fixed seat frames 200 can be adjusted accordingly as needed, so that the seat frame can be adjusted into longer seat units such as three-person seats, four-person seats, five-person seats, etc. Preferably, a first connecting member 141 is provided on the second side frame 140; a second connecting member 201 is provided on one side of the fixed seat frame 200 facing the adjacent linkage mechanism 120 or the fixed seat frame 200, and the second connecting member 201 can be connected in cooperation with the adjacent first connecting member 141 or the second connecting member 201. Optionally, the second connecting member 201 and the adjacent first connecting member 141 or the second connecting member 201 can be connected by means of pin connection, snap connection, bolt connection, etc. The innovation point of this application does not lie in the specific formation or connection method of the connecting member, and will not be listed one by one here. Now, a three-person seat unit is taken as an exemplary illustration. This three-person seat unit has one movable seat frame 100 (for convenience of description, hereinafter simply referred to as movable frame A) and two fixed seat frames 200 (for convenience of description, hereinafter simply referred to as fixed frames B and C). Among them, the movable frame A, the fixed frame B, and the fixed frame C are arranged horizontally, that is, the movable frame A and the fixed frame B are adjacent to each other, and the fixed frame B and the fixed frame C are adjacent to each other. The movable frame A at the end of the arrangement has a linkage mechanism 120 that can independently transform 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, and the first connecting member 141 on the second side frame 140 is connected in cooperation with the second connecting member 201 on the side of the fixed frame B facing the movable frame A. The fixed frames B and C each have their own second connecting member 201 on their mutually facing sides, and the two second connecting members 201 are connected in cooperation with each other, so that the movable frame A, the fixed frame B, and the fixed frame are connected side by side horizontally; further, the number of the fixed seat frames 200 can be increased or decreased according to the required length, which improves the scalability of the seat unit. For this purpose, only the connection between the second connecting member 201 and the adjacent first connecting member 141 or the second connecting member 201 needs to be released to remove the redundant fixed seat frame 200, or the fixed seat frame 200 to be added can be arranged horizontally in sequence with other fixed seat frames 200 and / or the movable seat frame 100, and driving the second connecting member 201 to be connected with the adjacent first connecting member 141 or the second connecting member 201 can fix the fixed seat frame 200.

[0039] Further, referring to Figure 2, the second side frame 140 includes 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 disposed at the rear end of the second longitudinal beam 143. Further, the number of the first connectors 141 is multiple and is distributed on the second longitudinal beam 143 and the second auxiliary beam 144. Refer to Figure 2 , each of the second longitudinal beam 143 and the second auxiliary beam 144 has a first connector 141. Correspondingly, the fixed seat frame 200 includes 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 disposed at the rear end of the third longitudinal beam 203. Refer to Figure 2 , each of the third longitudinal beam 203 and the third auxiliary beam 204 has a second connector 201. In this way, the first connector 141 on the second longitudinal beam 143 is fixedly connected to the second connector 201 on the third longitudinal beam 203, and the first connector 141 on the second auxiliary beam 144 is fixedly connected to the second connector 201 on the third auxiliary beam 204 to achieve a stable connection between the movable seat frame 100 and the fixed seat frame 200.

[0040] Refer to Figure 8 and Figure 9 , the fixed seat frame 200 includes two sets of the third longitudinal beam 203 and the third auxiliary beam 204. The front and rear ends of the two third longitudinal beams 203 are fixedly connected through connecting members. Optionally, a frame structure for forming a seat portion or supporting a seat cushion is further disposed above the third longitudinal beam 203. The innovation point of the present application does not lie in the specific formation manner of this frame structure, and will not be listed one by one here.

[0041] In some embodiments, the seat frame may be composed only of the movable seat frame 100, and the movable seat frame 100 can be applied to a single-seat chair unit, a double-seat chair unit or a multi-seat chair unit. Optionally, when the movable seat frame 100 is applied to a double-seat chair unit or a multi-seat chair unit, the linkage mechanism 120 includes at least two mechanical extension devices 121 arranged horizontally. A third side frame is connected to one side of the mechanical extension device 121 facing the adjacent mechanical extension device 121, and the third side frame is used to fixedly connect two adjacent mechanical extension devices 121. Now, taking a three-seat chair unit as an example for illustration, the three-seat chair unit has three mechanical extension devices 121. For convenience of description, the three mechanical extension devices 121 are respectively defined as device A, device B, and device C. Device A, device B, and device C are arranged horizontally, and each mechanical extension device 121 can independently transform between a sitting position and a lying position. Since device A and device C are located at both ends of the arrangement, the first side frames 110 are provided on the sides of device A and C facing away from device B. The armrest member 130 is fixedly connected to the side of the first side frame 110 facing away from the mechanical extension device 121. Adjacent devices A and B each have their own third side frames on their facing sides, and correspondingly, adjacent devices C and B also each have their own third side frames on their facing sides. By connecting these four third side frames to each other, devices A, B, and C are connected side by side horizontally. The two adjacent third side frames can be connected by riveting, threaded connection, plugging, etc. This modular construction method can increase or decrease the number of mechanical extension devices 121, that is, the number of seats, according to the required length, improving the scalability of the chair unit. That is, it can also be adjusted accordingly to longer chair units such as double-seat, four-seat, five-seat, etc. as needed; when the chair unit is configured as a single-seat chair unit, the chair unit includes only one set of mechanical extension device 121, a pair of the first side frames 110 on the left and right sides of the mechanical extension device 121, and the armrest member 130 fixedly connected directly to the first side frame 110.

[0042] Further, the chair frame is composed of the movable seat frame 100 and the fixed seat frame 200, wherein the linkage mechanism 120 includes at least one mechanical extension device 121 arranged in a transverse direction, the mechanical extension device 121 and the fixed seat frame 200 are arranged in a transverse direction, and the mechanical extension device 121 located at the end of the arrangement has the first side frame 110, the first side frame 110 is arranged on the outside of the mechanical extension device 121, and the first side frame 110 is fixedly connected to the armrest 130 on the side away from the mechanical extension device 121. If another mechanical extension device 121 is adjacent to the mechanical extension device 121, the two adjacent mechanical extension devices 121 respectively have their own third side frames on the sides facing each other, and by means of The mutual connection of the two third side frames enables the two adjacent mechanical extension devices 121 to be connected in parallel with each other in the horizontal direction; if the fixed seat frame 200 and the mechanical extension device 121 are adjacent to each other, the second side frame 140 is provided on the side of the mechanical extension device 121 facing the fixed seat frame 200, and the first connecting member 141 on the second side frame 140 is cooperated and connected with the second connecting member 201 on the side of the fixed seat frame 200 facing the mechanical extension device 121, so that the adjacent mechanical extension devices 121 and the fixed seat frame 200 are connected in parallel with each other in the horizontal direction; further, the number of the fixed seat frame 200 and / or the mechanical extension device 121 can be increased or decreased according to the required length, thereby improving the scalability of the seat unit.

[0043] Furthermore, the third side frame may be provided with the first connecting member 141, through which the two adjacent third side frames are fixedly connected, that is, the mechanical stretching device 121 can also be fixedly connected to the fixed seat frame 200 through the third side frame; preferably, the second side frame 140 and the third side frame adopt the same structure to optimize the structure of the movable seat frame 100 and improve the versatility of components.

[0044] In some embodiments, a fixed support member 202 is further included, and the fixed support member 202 is disposed at the lower end of the fixed seat frame 200. Figure 1 , Figure 8 and Figure 9The 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 member 202, so that the fixed seat frame 200 can provide a stable support to the side of the linkage mechanism 120 away from the first side frame 110 through the second side frame 140. At the same time, the linkage mechanism 120 provides a stable support to the side facing the first side frame 110, thereby making the overall seat frame more stable, effectively reducing shaking, and optimizing the consumer's use experience.

[0045] In some embodiments, an auxiliary support member 142 is further included, and the auxiliary support member 142 is disposed at the lower end of the second side frame 140 and / or the third side frame. 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 member 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 member 142 at the lower end of the third side frame. In particular, when the seat frame is composed of only the movable seat frame 100, both sides of the mechanical stretching device 121 located in the middle of the arrangement have the third side frame. In this way, the auxiliary support member 142 at the lower end of the third side frame is supported on the ground, driving the third side frame to provide stable support to the mechanical stretching device 121, making the overall seat frame more stable and effectively reducing shaking.

[0046] In some embodiments, a seating unit includes the seat frame described above. 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 a mechanical extension device 121 that can be changed between at least a sitting position and a lying position. Figure 4, the mechanical extension device 121 includes mechanical extension device halves 122 symmetrically arranged on the left and right sides. Each mechanical extension device half 122 has a fixed plate 123 longitudinally extending along the front-back direction of the movable seat. Each mechanical extension device half 122 is assembled on the side of the first longitudinal beam 111 facing the mechanical extension device 121 by means of its respective fixed plate 123, or each mechanical extension device half 122 is assembled on the side of the second side frame 140 or the third side frame facing the mechanical extension device 121 by means of its respective fixed plate 123. Each fixed plate 123 is respectively attached to a common fixed cross beam 124 by means of connecting rods. The fixed cross beam 124 is located on the backrest side, that is, the rear end of the seat frame; further, the main support member 112 and the auxiliary support member 142 are also respectively attached to the fixed cross beam 124 by means of corresponding connecting rods. Preferably, refer to Figure 6 and Figure 7 , the mechanical extension device 121 further includes a linear electric actuator 125, a seat component 126, a backrest component 127 pivotally connected to the rear end of the seat component 126, and a leg component 128 pivotally connected to the front end of the seat component 126. When changing between the sitting position and the lying position, the linear electric actuator 125 can drive the leg component 128 to extend forward, while driving the seat component 126 to move forward, and the rearmost end point of the backrest component 127 has a forward movement component and no backward movement component, so that the seat unit is applicable to various seat units such as "zero gravity" and "zero wall contact". The innovation point of this application does not lie in the specific structure of the mechanical extension device 121, and will not be listed one by one here.

[0047] The technical means disclosed in the solution of this application are not limited to the technical means disclosed in the above embodiments, and also include technical solutions composed of any combination of the above technical features. It should be noted that for those of ordinary skill in the art of this technology, without departing from the principle of this application, several improvements and refinements can be made, and these improvements and refinements are also regarded as the protection scope of this application.

Claims

1. A chair frame, comprising a movable seat frame (100), wherein the movable seat frame (100) comprises a first side frame (110), a linkage mechanism (120) and an armrest member (130), characterized in that: The first side frame (110) comprises a first longitudinal beam (111) and a main support member (112) connected to the lower end of the first longitudinal beam (111); The first longitudinal beam (111) is extended in the front-rear direction, and the main support member (112) is used 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 capable of switching between a sitting position and a lying position; The armrest member (130) is fixedly connected to a side of the first seat frame that is away from the linkage mechanism (120).

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

3. The seat frame according to claim 1, characterized in that: The lower end of the armrest member (130) is connected to a plurality of supporting foot members (131) for supporting on the ground, and the supporting foot members (131) are arranged along the front-rear direction.

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

5. The seat frame according to claim 1, characterized in that: It also comprises a fixed seat frame (200), a second side frame (140) being arranged on the side of the linkage mechanism (120) facing the fixed seat frame (200), and the second side frame (140) being fixedly connected to the side of the fixed seat frame (200) facing the linkage mechanism (120).

6. The seat frame according to claim 5, characterized in that: A first connecting member (141) is arranged on the second side frame (140); a second connecting member (201) is arranged on a side of the fixed seat frame (200) facing the mutually adjacent linkage mechanism (120) or the fixed seat frame (200), and the second connecting member (201) can be matched and connected with the mutually adjacent first connecting member (141) or the second connecting member (201).

7. The seat frame according to claim 1 or 6, characterized in that: 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 one side of the mechanical stretching device (121) facing the mutually adjacent mechanical stretching device (121), and the third side frame is used to fix the two mutually adjacent mechanical stretching devices (121) in connection.

8. The seat frame according to claim 7, characterized in that: It also includes an auxiliary support member (142), and the auxiliary support member (142) is arranged at the lower end of the second side frame (140) and / or the third side frame.

9. The seat frame according to claim 5, characterized in that: It also includes a fixed support member (202), wherein the fixed support member (202) is arranged at the lower end of the fixed seat frame (200).

10. A seat unit, characterized in that: Comprising a seat frame as claimed in any one of claims 1 to 9.

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