A seat

Abstract

The utility model relates to the technical field of seat, disclose a seat. The utility model discloses a seat, including back beam, chassis subassembly, chair back, connecting rod subassembly, telescopic subassembly and drive part. Chassis subassembly includes the first component and second component of rotation connection. Connecting rod subassembly includes mounting seat, first connecting rod, sliding part and second rod group. Drive part is used for drive telescopic subassembly telescopic. Through connecting rod subassembly connection on entire chair back, make entire chair back relative back beam rotate instead of being limited to waist pillow, then again through adding a mounting seat in connecting rod subassembly, and set up telescopic subassembly on mounting seat, let seat not only can realize chair back when leaning back and incline under the action of connecting rod subassembly, still can when the support degree of chair back to back is not enough after incline, initiative control drive part drive telescopic subassembly telescopic to further adjust the rotation angle of chair back relative back beam, ensure that chair back can better support back, improve the use experience.

Description

Technical Field

[0001] This utility model relates to the field of seating technology, specifically to a type of seating. Background Technology

[0002] Nowadays, chairs are a common piece of equipment used by people in their daily lives, and a comfortable chair back is one of the most sought-after features.

[0003] To improve seat comfort, some seats are equipped with a lumbar support that adjusts when the user leans back. This allows the lumbar support to tilt forward, providing better support for the lower back. However, this adjustable mechanism in these technologies is still not ideal in actual use. Utility Model Content

[0004] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a seat that improves the user's experience when reclining.

[0005] A seat according to an embodiment of the present invention includes a backrest, a chassis assembly, a backrest, a linkage assembly, a telescopic assembly, and a drive component. The chassis assembly includes a first component and a second component rotatably connected, the second component being fixedly connected to the backrest. The backrest includes a backrest area and a connecting area disposed opposite to each other; the backrest area supports the back, and the upper part of the connecting area is rotatably connected to the backrest. The linkage assembly includes a mounting base, a first connecting rod, a sliding member, and a second rod group; the lower end of the mounting base is rotatably connected to the backrest, the sliding member is slidably connected to the backrest, and the sliding member, the first connecting rod, the mounting base, the second rod group, and the first component are rotatably connected in sequence. One end of the telescopic assembly is disposed on the mounting base, and the other end is slidably connected to the lower part of the connecting area and is rotatable relative to the connecting area. The drive component is used to drive the telescopic assembly to extend and retract, thereby causing the backrest to rotate relative to the backrest. When the second component rotates backward relative to the first component, the first component pulls the slider downward relative to the back beam via the second rod group, the mounting base, and the first connecting rod. The slider pushes the first connecting rod to rotate, causing the mounting base to rotate forward relative to the back beam. This causes the mounting base to drive the telescopic assembly to push the lower end of the chair back to rotate forward relative to the back beam.

[0006] The seat according to the present invention has at least the following beneficial effects: the linkage assembly is connected to the entire backrest, so that the entire backrest can rotate relative to the back beam instead of being limited to the lumbar support. Then, by adding a mounting seat to the linkage assembly and setting a telescopic component on the mounting seat, the seat can not only tilt forward under the action of the linkage assembly when reclining, but also actively control the drive component to extend and retract the telescopic component when the backrest is not sufficiently supported after tilting forward, thereby further adjusting the rotation angle of the backrest relative to the back beam, ensuring that the backrest can better support the back and improve the user experience.

[0007] According to some embodiments of the present invention, the second rod assembly includes a second connecting rod, a third connecting rod, and an adapter. The seat also includes a seat cushion, which is disposed above the chassis assembly. The bottom end of the adapter is rotatably connected to the back beam. The two ends of the second connecting rod are rotatably connected to the mounting base and the adapter, respectively. The two ends of the third connecting rod are rotatably connected to the seat cushion and the adapter, respectively. The end of the seat cushion away from the third connecting rod is rotatably connected to the first component.

[0008] According to some embodiments of the present invention, the third link includes a curved section, which is rotatably connected to the seat cushion. The seat includes an initial state, in which the seat cushion faces the back beam and the curved section gradually tilts downward.

[0009] According to some embodiments of the present invention, the first connecting rod is straight and includes a first end and a second end. The first end is rotatably connected to the sliding member, and the second end is rotatably connected to the mounting base. The seat includes an initial state. When the seat is in the initial state, the first end is located above the second end, and from top to bottom, the first connecting rod gradually tilts forward relative to the vertical plane.

[0010] According to some embodiments of the present invention, the seat further includes an elastic element, one end of which is connected to the back beam and the other end of which is connected to the sliding element. When the sliding element slides downward relative to the back beam, the elastic force of the elastic element drives the sliding element to slide upward relative to the back beam.

[0011] According to some embodiments of the present invention, the sliding member includes a body portion and a protrusion portion. The back beam is recessed with a sliding groove. The body portion is slidably disposed in the sliding groove. The upper end of the body portion is connected to the elastic member. The protrusion portion extends outward from the sliding groove relative to the body portion. The protrusion portion is rotatably connected to the first connecting rod.

[0012] According to some embodiments of the present invention, the telescopic assembly includes a telescopic rod that can extend and retract relative to the mounting base. A sliding post is provided at the end of the telescopic rod away from the mounting base. A guide groove is provided in the connecting area. The sliding post is slidably disposed in the guide groove and can rotate about its own axis relative to the guide groove.

[0013] According to some embodiments of the present invention, along the height direction of the mounting base, the connection position of the first connecting rod to the mounting base is spaced above the connection position of the second rod group to the mounting base.

[0014] According to some embodiments of the present invention, the seat includes an initial state, in which the distance between the backrest and the back beam gradually increases from top to bottom.

[0015] According to some embodiments of the present invention, the seat further includes a headrest, the upper end of which is rotatably connected to the back beam, the headrest is located above the backrest, and the lower end of which is used to rest the head.

[0016] Additional aspects and advantages of this invention 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 the invention. Attached Figure Description

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein: Figure 1 This is a perspective view of the seat in its initial state according to one embodiment of the present invention; Figure 2 This is a side view of the seat in its initial state according to one embodiment of the present invention; Figure 3 for Figure 2 Enlarged view of region A in the middle; Figure 4 This is an exploded view of a partial structure of the seat in one embodiment of the present invention; Figure 5 This is a side view of the seat in a first reclining state according to one embodiment of the present invention; Figure 6 This is a side view of the seat in a second reclining state according to one embodiment of the present invention.

[0018] Reference numerals: Seat 100, Backrest 101, Chassis assembly 102, Backrest 103, Reclining area 104, Link assembly 105, Cushion 106, Headrest 107, First component 201, Second component 202, Connecting area 203, Mounting seat 204, First link 205, Sliding member 206, Second rod group 207, Telescopic assembly 208, Fourth link 209, Second link 301, Third link 302, Adapter 303, First end 304, Second end 305, Telescopic rod 306, Sliding column 307, Guide groove 308, Drive component 309, Bending section 310, Elastic member 401, Body part 402, Protrusion 403, Sliding groove 404, Limiting block 405, Cover plate 406. Detailed Implementation

[0019] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in 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 utility model, and should not be construed as limiting this utility model.

[0020] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model 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. Therefore, they should not be construed as limitations on this utility model.

[0021] In the description of this utility model, "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.

[0022] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0023] In the description of this utility model, the terms "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this utility model. 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.

[0024] refer to Figures 1 to 6 According to an embodiment of the present invention, a seat 100 includes a backrest 101, a chassis assembly 102, a backrest 103, a linkage assembly 105, a telescopic assembly 208, and a drive member 309. The chassis assembly 102 includes a first component 201 and a second component 202 rotatably connected, with the second component 202 fixedly connected to the backrest 101. The backrest 103 includes a backrest area 104 and a connecting area 203 arranged opposite to each other. The backrest area 104 supports the back, and the upper part of the connecting area 203 is rotatably connected to the backrest 101. The linkage assembly 105 includes a mounting base 204, a first connecting rod 205, a sliding member 206, and a second rod group 207. The lower end of the mounting base 204 is rotatably connected to the backrest 101, and the sliding member 206 is slidably connected to the backrest 101. The sliding member 206, the first connecting rod 205, the mounting base 204, the second rod group 207, and the first component 201 are rotatably connected in sequence. One end of the telescopic assembly 208 is disposed on the mounting base 204, and the other end is slidably connected to the lower part of the connecting area 203 and can rotate relative to the connecting area 203. The driving member 309 is used to drive the telescopic assembly 208 to extend or retract, thereby causing the chair back 103 to rotate relative to the back beam 101. When the second component 202 rotates backward relative to the first component 201, the first component 201 pulls the sliding member 206 through the second rod group 207, the mounting base 204, and the first connecting rod 205, causing it to slide downward relative to the back beam 101. The sliding member 206 pushes the first connecting rod 205 to rotate, causing the mounting base 204 to rotate forward relative to the back beam 101, so that the mounting base 204 drives the telescopic assembly 208 to push the lower end of the chair back 103 to rotate forward relative to the back beam 101 (e.g., Figure 5 and Figure 6 (As shown).

[0025] Although the linkage mechanism in the relevant technology can tilt the lumbar support forward to support the user's back when the user leans back, different people have different leaning angles and body shapes. In actual use, the linkage device between the lumbar support and the back beam cannot make the lumbar support fit the user's back well, resulting in a poor user experience.

[0026] refer to Figure 2 and Figure 3In this embodiment of the present invention, the seat 100 connects the linkage assembly 105 to the entire backrest 103, allowing the entire backrest 103 to rotate relative to the back beam 101 instead of being limited to the lumbar support. Furthermore, by adding a mounting base 204 to the linkage assembly 105 and installing a telescopic component 208 on the mounting base 204, the seat 100 not only allows the backrest 103 to tilt forward under the action of the linkage assembly 105 when reclining, but also, when the backrest 103's support for the back is insufficient after tilting forward, actively controls the drive component 309 to drive the telescopic component 208 to extend or retract, thereby further adjusting the rotation angle of the backrest 103 relative to the back beam 101 (e.g., ...). Figure 5 and Figure 6 (As shown in the changes), this ensures that the backrest 103 can better support the back and improve the user experience.

[0027] refer to Figure 2 , Figure 3 and Figure 5 In some embodiments of this utility model, the specific principle of the adaptive reclining adjustment of the seat 100 is as follows: When the user reclines, the backrest 101 drives the second component 202 to rotate backward relative to the first component 201. Since the second rod group 207 is indirectly rotatably connected to the first component 201 through the seat cushion 106, the reclining of the backrest 101 causes the sliding member 206 to slide downward along the backrest 101 under the tension constraint of the first connecting rod 205, the mounting seat 204, and the second rod group 207. However, the mounting seat 204 can only rotate relative to the backrest 101 and cannot slide relative to the backrest 101. Therefore, the sliding member 206 will approach the mounting seat 204, thereby applying a pushing force to the mounting seat 204 through the first connecting rod 205, causing the mounting seat 204 to rotate forward relative to the backrest 101 (e.g., Figure 5 As shown), the mounting base 204 and the telescopic component 208 mounted on the mounting base 204 will exert a greater pushing force on the lower end of the chair back 103, causing the lower end of the chair back 103 to rotate forward relative to the back beam 101, thus realizing the linkage adjustment between the reclining motion and the forward tilt of the chair back 103. Further, refer to... Figure 5 and Figure 6 ,if Figure 5 The shown configuration still does not provide adequate support for the user's back. The user can choose to extend the telescopic component 208 by controlling the drive component 309, thereby achieving... Figure 6 To better support the user's back and improve the user experience, the mounting base 204 not only rotates to change the tilt angle of the backrest 103, but also has a telescopic mechanism on it that further enhances the adjustability.

[0028] It should be noted that, Figure 4 The structure shown mainly consists of the link assembly 105 and its related components, which are intended to demonstrate the specific shapes and their mating relationships of the first link 205, the second link group 207, and the telescopic assembly 208.

[0029] It should be noted that the reference Figure 2 and Figure 5 In some embodiments of this utility model, the seat 100 further includes a fourth link 209, which is disposed between the seat cushion 106 and the base assembly. At least one fourth link 209 is rotatably connected to the front end of the first component 201 and the seat cushion 106, and is spaced apart from the second link group 207. This allows the second link group 207 and the first component 201 to be indirectly connected via the fourth link 209 and the seat cushion 106, facilitating the slight swaying of the seat cushion 106 during the reclining process of the seat 100. The fourth link 209 adds two rotating joints to the connection path, making the reclining of the backrest 101 smoother. Further, refer to... Figure 2 In some embodiments, a spring buffer structure is also provided on the fourth link 209, so that the fourth link 209 can also buffer the seat cushion 106 and the chassis assembly 102 in a normal sitting posture, thereby improving the user experience.

[0030] It should be noted that the reference Figure 2 and Figure 4 In some embodiments of this utility model, the connecting area 203 is composed of two parts, the upper part is used to rotatably connect the upper end of the back beam 101, and the lower part is used to connect the telescopic component 208. This structure can achieve better weight reduction and reduce unnecessary structural design in the middle area.

[0031] It should be noted that the reference Figures 4 to 6 In some embodiments of this utility model, the telescopic component 208 can be a cylinder piston structure, or a telescopic linkage structure, etc., which can achieve telescopic extension to change the length and can support the rotation of the chair back 103.

[0032] refer to Figure 2 and Figure 3In some embodiments of this utility model, the second rod assembly 207 includes a second connecting rod 301, a third connecting rod 302, and a connector 303. The seat 100 also includes a seat cushion 106, which is disposed above the chassis assembly 102. The bottom end of the connector 303 is rotatably connected to the back beam 101. The two ends of the second connecting rod 301 are rotatably connected to the mounting base 204 and the connector 303, respectively. The two ends of the third connecting rod 302 are rotatably connected to the seat cushion 106 and the connector 303, respectively. The end of the seat cushion 106 away from the third connecting rod 302 is rotatably connected to the first component 201. By splitting the second linkage 207 into two connecting rods and a rotatable adapter 303, more rotational freedom is provided to the entire linkage mechanism, making the backward linkage process smoother and more natural, and preventing jamming. Specifically, the adapter 303 serves as the anchor point for the rotatable connection of the back beam 101, with the second connecting rod 301 and the third connecting rod 302 respectively set at both ends. No matter how it swings, the stress can be evenly distributed on the rotating part and the two connecting rods.

[0033] refer to Figure 3 , Figure 5 and Figure 6 In some embodiments of this utility model, the third link 302 includes a bent section 310, which is rotatably connected to the seat cushion 106. The seat 100 is in an initial state. When the seat 100 is in the initial state, the bent section 310 gradually tilts downwards from the seat cushion 106 toward the backrest 101. During the reclining process, the user's normal requirement should be that the backrest 103 tilts forward appropriately to support the waist, while the seat cushion 106 should not collapse too much. Therefore, the third link 302 connected to the seat cushion 106 is provided with a bent section 310 in the initial state, such as... Figure 3 As shown, from back to front, the end near the seat cushion 106 gradually curves upwards, and when the user leans back, the curved section 310 can... Figure 5 and Figure 6 The upward support force applied to the seat cushion 106, as shown, prevents the rear end of the seat cushion 106 from collapsing under the force of the second lever assembly 207, thus improving the user experience. It keeps the buttocks from collapsing while the lumbar region is supported by the backrest 103. The curved section 310 also allows the adapter 303 to connect to more positions on the backrest 101, making it more adaptable. For example, see reference... Figure 3 When the seat 100 is in its initial state, the rear end of the third link 302 is slightly higher than the front end. However, due to the presence of the curved section 310, the end near the seat cushion 106 is still able to support the seat cushion 106 rather than press down on it.

[0034] It should be noted that the bending section 310 can be as follows: Figure 3The image shown is only a part of the third link 302. In some embodiments, the third link 302 may also be inclined as a whole to form a curved section 310. For example, when the adapter 303 and the rear end of the third link 302 are relatively low, the third link 302 may be inclined upward from back to front.

[0035] It should be noted that the initial state of the seat 100 in this embodiment of the present invention refers to... Figure 1 as well as Figure 2 The state shown is one in which no external force is applied, or in other words, the user is simply sitting on the seat cushion 106 without applying any leaning force to the backrest 101 or the backrest 103.

[0036] refer to Figure 3 In some embodiments of this utility model, the first connecting rod 205 is straight. The first connecting rod 205 includes a first end 304 and a second end 305. The first end 304 is rotatably connected to the slider 206, and the second end 305 is rotatably connected to the mounting base 204. The seat 100 has an initial state. When the seat 100 is in the initial state, the first end 304 is located above the second end 305, and from top to bottom, the first connecting rod 205 gradually tilts forward relative to the vertical plane. This allows the slider 206 to push the first end 304 to rotate when sliding downwards, and the second end 305 to have a tendency to rotate forward, thereby pushing the mounting base 204 to rotate forward, achieving... Figure 5 In this state, the lower end of the chair back 103 is pushed, so that the chair back 103 tilts forward in conjunction with the user's backward leaning process.

[0037] refer to Figure 4 In some embodiments of this utility model, the seat 100 further includes an elastic element 401. One end of the elastic element 401 is connected to the backrest 101, and the other end is connected to a sliding element 206. When the sliding element 206 slides downward relative to the backrest 101, the elastic force of the elastic element 401 drives the sliding element 206 to slide upward relative to the backrest 101. The elastic element 401 enables the sliding element 206 to return to its original position under the elastic force of the elastic element 401 after the user's external force on the backrest 103 is eliminated, preparing for a new round of reclining.

[0038] In some embodiments of this utility model, an elastic component is also provided between the first component 201 and the second component 202. When the second component 202 rotates backward relative to the first component 201, the elastic force of the elastic component can drive the second component 202 to rotate forward relative to the first component 201, thereby resetting.

[0039] refer to Figure 4In some embodiments of this utility model, the sliding member 206 includes a body portion 402 and a protrusion 403. The back beam 101 is recessed with a sliding groove 404. The body portion 402 is slidably disposed within the sliding groove 404. The upper end of the body portion 402 is connected to the elastic member 401. The protrusion 403 extends outward from the sliding groove 404 relative to the body portion 402. The protrusion 403 is rotatably connected to the first connecting rod 205. The design of the sliding groove 404 allows both the body portion 402 and the elastic member 401 to be disposed inside the back beam 101, improving aesthetics and space utilization. Furthermore, the design of the protrusion 403 ensures that the sliding member 206 can still be rotatably connected to the first connecting rod 205.

[0040] Further reference Figure 4 In some embodiments of this utility model, a limiting block 405 is provided in the sliding groove 404 to prevent the elastic member 401 from driving the sliding member 206 to slide too far, which would affect the sliding function of the sliding member 206 when tilting backward. Furthermore, a cover plate 406 is also provided outside the sliding groove 404, and a through hole is opened on the cover plate 406 for the protrusion 403 to slide, so that the sliding groove 404 can be covered and hidden, further improving the aesthetics.

[0041] refer to Figures 3 to 6 In some embodiments of this utility model, the telescopic component 208 includes a telescopic rod 306, which is telescopic relative to the mounting base 204. A sliding post 307 is provided at the end of the telescopic rod 306 away from the mounting base 204. A guide groove 308 is provided in the connecting area 203, and the sliding post 307 is slidably disposed within the guide groove 308. The sliding post 307 can rotate relative to the guide groove 308 around its own axis. The guide groove 308 allows the sliding post 307 of the telescopic rod 306 to slide, and the cylindrical design of the sliding post 307 itself allows it to rotate within the guide groove 308. Thus, during the reclining process of the seat 100, the connection position between the telescopic rod 306 and the connecting area 203 can both slide and rotate, ensuring that the reclining process and the forward tilting of the seat back 103 can be smoothly completed. Furthermore, the connection method of the sliding post 307 being engaged in the guide groove 308 is also very stable and not easily loosened.

[0042] refer to Figure 3 and Figure 5 In some embodiments of this utility model, along the height direction of the mounting base 204, the connection position of the first connecting rod 205 and the mounting base 204 is spaced above the connection position of the second rod group 207 and the mounting base 204. Because during the backward tilting process of the back beam 101, the lower end of the first connecting rod 205 tends to rotate forward, thereby pushing the mounting base 204 to rotate, setting the connection position of the first connecting rod 205 above the connection position of the second rod group 207 on the mounting base 204 can avoid interference between the rotation of the first connecting rod 205 and the second rod group 207, allowing it to smoothly rotate from... Figure 3 The state shown is rotated to Figure 5 The state shown.

[0043] refer to Figure 2 In some embodiments of this utility model, the seat 100 includes an initial state. When the seat 100 is in the initial state, the distance between the backrest 103 and the back beam 101 gradually increases from top to bottom. This allows the lower end of the backrest 103 to have a forward-leaning tendency, providing some support for the lumbar region in the initial state. Furthermore, in some embodiments of this utility model, the seat 100 also includes a lumbar support pillow, which is connected to the backrest surface near the seat cushion 106 to better support the lumbar region.

[0044] refer to Figure 1 , Figure 2 and Figure 5 In some embodiments of this utility model, the seat 100 also includes a headrest 107. The upper end of the headrest 107 is rotatably connected to the backrest 101. The headrest 107 is located above the backrest 103, and the lower end of the headrest 107 is used to support the head. When the user leans back, in addition to needing some support for the lower back, the head also needs a better comfort experience. However, the head cannot lean back too far, otherwise it will cause cerebral congestion and discomfort. Therefore, the head needs to rotate forward appropriately to keep the head facing upward. Thus, the lower end of the headrest 107 is used to support the head. When the upper end is rotatably connected to the backrest 101, the head will apply pressure to the lower end of the headrest 107 during the leaning process, causing the lower end of the headrest 107 to rotate backward, thereby... Figure 2 The state shown becomes Figure 5 In the state shown, the user's head can avoid congestion. Therefore, when the seat 100 is reclined, the entire seat 100, from the seat cushion 106 to the backrest 103 and the headrest 107, remains as... Figure 5 and Figure 6 The curves shown all conform to the curves of the human body, improving comfort.

[0045] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention 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 the present invention. Furthermore, the embodiments of the present invention and the features thereof can be combined with each other unless otherwise specified.

Claims

1. A seat, characterized in that, include: Back beam; A chassis assembly, comprising a first component and a second component rotatably connected, the second component being fixedly connected to the back beam; The chair back includes a backrest area and a connecting area arranged opposite to each other. The backrest area is used to support the back, and the upper part of the connecting area is rotatably connected to the back beam. A linkage assembly, comprising a mounting base, a first link, a slider, and a second link group, wherein the lower end of the mounting base is rotatably connected to the back beam, the slider is slidably connected to the back beam, and the slider, the first link, the mounting base, the second link group, and the first component are rotatably connected in sequence. A telescopic assembly, one end of which is disposed on the mounting base, and the other end is slidably connected to the lower part of the connecting area and is rotatable relative to the connecting area; A driving component, the driving component being used to drive the telescopic assembly to extend or retract, thereby causing the chair back to rotate relative to the back beam; When the second component rotates backward relative to the first component, the first component pulls the slider downward relative to the back beam via the second rod group, the mounting base, and the first connecting rod. The slider pushes the first connecting rod to rotate, causing the mounting base to rotate forward relative to the back beam. This causes the mounting base to drive the telescopic assembly to push the lower end of the chair back to rotate forward relative to the back beam.

2. The seat according to claim 1, characterized in that, The second linkage includes a second link, a third link, and an adapter. The seat also includes a seat cushion, which is disposed above the chassis assembly. The bottom end of the adapter is rotatably connected to the back beam. The two ends of the second link are rotatably connected to the mounting base and the adapter, respectively. The two ends of the third link are rotatably connected to the seat cushion and the adapter, respectively. The end of the seat cushion away from the third link is rotatably connected to the first component.

3. The seat according to claim 2, characterized in that, The third link includes a curved section that is rotatably connected to the seat cushion. The seat has an initial state in which the curved section gradually tilts downwards from the seat cushion toward the back beam.

4. The seat according to claim 1, characterized in that, The first link is straight and includes a first end and a second end. The first end is rotatably connected to the slider and the second end is rotatably connected to the mounting base. The seat includes an initial state in which the first end is located above the second end and, from top to bottom, the first link gradually tilts forward relative to the vertical plane.

5. The seat according to claim 1, characterized in that, The seat also includes an elastic element, one end of which is connected to the backrest and the other end of which is connected to the sliding element. When the sliding element slides downward relative to the backrest, the elastic force of the elastic element drives the sliding element to slide upward relative to the backrest.

6. The seat according to claim 5, characterized in that, The sliding member includes a body and a protrusion. The back beam is recessed with a sliding groove. The body slides in the sliding groove. The upper end of the body is connected to the elastic member. The protrusion extends out of the sliding groove relative to the body and is rotatably connected to the first connecting rod.

7. The seat according to claim 1, characterized in that, The telescopic assembly includes a telescopic rod that can extend and retract relative to the mounting base. A sliding post is provided at the end of the telescopic rod away from the mounting base. A guide groove is provided in the connection area. The sliding post is slidably disposed in the guide groove and can rotate about its own axis relative to the guide groove.

8. The seat according to claim 1, characterized in that, Along the height direction of the mounting base, the connection position between the first connecting rod and the mounting base is spaced above the connection position between the second rod group and the mounting base.

9. The seat according to claim 1, characterized in that, The seat includes an initial state in which the distance between the backrest and the back beam gradually increases from top to bottom.

10. The seat according to claim 1, characterized in that, The seat also includes a headrest, the upper end of which is rotatably connected to the backrest, the headrest is located above the backrest, and the lower end of which is used to support the head.

Images