Seat back adjusting assembly for seat and seat

Abstract

The utility model discloses a seat back adjusting assembly for a chair and the chair, the seat back adjusting assembly comprises a chair seat and a chair back connected to the chair seat, and a waist pillow for supporting the waist is arranged on one side, close to the chair seat, of the chair back; the chair seat comprises a seat frame and a base, the seat frame is arranged on the base in a sliding mode so as to be close to or away from the chair back, and the waist pillow and the seat frame are connected through a linkage assembly so that the waist pillow can synchronously move along with the seat frame. Seat-back linkage can be achieved, and the comfort level of a user is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to chair technical field, concretely relates to a seat back adjusting assembly for chair and chair. BACKGROUND

[0002] In modern office and home environment, as people's daily life and work indispensable furniture, its design humanization and comfort are paid more and more attention by consumers.

[0003] Traditional chair design often focuses on basic support function and appearance modeling, and the consideration of ergonomics is relatively insufficient. In the process of reclining, the relative position of the human body and the chair back and seat will change, that is, the human body slides forward relative to the chair back and seat, and the chair back often no longer supports the waist of the human body, causing user discomfort. SUMMARY

[0004] The utility model aims at providing a seat back adjusting assembly for chair and chair, which can realize seat back linkage and improve user comfort.

[0005] To achieve the above object, the utility model adopts the following technical scheme:

[0006] A seat back adjusting assembly for chair, comprising a seat and a chair back connected to the seat, the side of the chair back close to the seat is provided with a lumbar pillow for supporting the waist; the seat comprises a seat frame and a base, the seat frame is slidably arranged on the base to approach or away from the chair back, the lumbar pillow and the seat frame are connected through a linkage assembly to make the lumbar pillow move synchronously with the seat frame.

[0007] Preferably, the linkage assembly comprises a sliding plate, a first linkage rod and a second linkage rod; the sliding plate is in sliding cooperation with the base, and the sliding plate is fixedly connected with the seat frame; one end of the first linkage rod is fixedly connected with the sliding plate, and the other end is fixedly connected with the second linkage rod; the second linkage rod is fixedly connected with the lumbar pillow.

[0008] Preferably, the linkage assembly comprises a connecting piece, the connecting piece is provided with a first connecting hole for connecting the seat frame and a second connecting hole for connecting the sliding plate.

[0009] Preferably, the sliding plate is configured as a rectangle, and the four corners of the sliding plate are all provided with the connecting piece.

[0010] Preferably, a support block is arranged between the second linkage rod and the lumbar pillow, one end of the support block is connected to the lumbar pillow, and the other end is connected to the second linkage rod.

[0011] Preferably, the second linkage rod is provided with a mounting groove near one side of the lumbar pillow, and the supporting block is provided with a protrusion near one end of the second linkage rod, the protrusion extending into and being fixed to the mounting groove.

[0012] Preferably, the first linkage rod is configured in an arc shape, and one end of the first linkage rod away from the sliding plate extends upward.

[0013] Preferably, the base is provided with a plurality of guide blocks protruding from the base towards one side surface of the seat frame, and the sliding plate is arranged on the guide blocks.

[0014] Preferably, the chair back comprises an elastic support connected to the base.

[0015] In addition, the utility model also adopts the following technical scheme to realize the above-mentioned purpose.

[0016] A seat comprises a supporting leg and the seat back adjusting assembly.

[0017] Compared with the prior art, the utility model has the beneficial effects that in the application, the seat frame can be moved forward synchronously with the human body when the user leans back by being provided with the slidable seat frame, the problem of unstable center of gravity caused by leaning back is avoided, and the position is not needed to be adjusted again. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 A structure schematic view of the seat provided for the embodiment of the application is provided;

[0019] Figure 2 A structure schematic view of the seat back adjusting assembly provided for the embodiment of the application is provided;

[0020] Figure 3 A partial structure schematic view of the seat back adjusting assembly provided for the embodiment of the application is provided;

[0021] Figure 4 An exploded schematic view of the seat back adjusting assembly is provided; Figure 3 A cooperation schematic view of the sliding plate and the seat frame in the embodiment of the application is provided;

[0022] Figure 5 A cooperation schematic view of the second linkage rod and the supporting block in the embodiment of the application is provided.

[0023] Figure 6 A cooperation schematic view of the second linkage rod and the supporting block in the embodiment of the application is provided.

[0024] Wherein, 1, seat back adjusting assembly; 11, chair seat; 111, seat frame; 112, base; 1121, guide block; 12, chair back; 121, lumbar pillow; 122, support; 13, linkage assembly; 131, sliding plate; 132, first linkage rod; 133, second linkage rod; 1331, mounting groove; 134, connecting piece; 1341, first connecting hole; 1342, second connecting hole; 135, support block; 1351, protrusion; 2, support leg. DETAILED DESCRIPTION

[0025] The utility model will be further described below in combination with the drawings and specific embodiments, it is to be noted that, without conflict, the following described embodiments or between the technical features can be combined to form a new embodiment. Except for the special description, the materials and equipment adopted in the embodiment can be purchased from the market. The examples of the embodiments are shown in the drawings, wherein the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary, only for explaining the application, and cannot be understood as limiting the application.

[0026] In the description of the present application, it should be understood that the terms "upper", "lower", "front", "back", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing 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, therefore, it cannot be understood as a limitation on the present application. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise specified and limited.

[0027] In the description of the present application, it should be noted that, unless otherwise expressly specified and limited, the terms "connected", "communicated", "connected" should be understood in a broad sense, for example, it can be fixedly connected, or connected through an intermediate medium, or the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0028] As Figure 1 And Figure 2As shown, the embodiment provides a seat back adjusting assembly 1 for a seat, the seat back adjusting assembly 1 comprising a seat cushion 11 and a seat back 12 connected to the seat cushion 11, the seat back 12 being provided with a lumbar support 121 on a side close to the seat cushion 11 for supporting a waist of a user; the seat cushion 11 comprising a seat frame 111 and a base 112, the seat frame 111 being slidably arranged on the base 112 to be close to or away from the seat back 12, and the lumbar support 121 and the seat frame 111 being connected through a linkage assembly 13 to make the lumbar support 121 move synchronously with the seat frame 111.

[0029] In the embodiment, the seat back adjusting assembly 1 comprises the seat cushion 11 and the seat back 12, the seat back 12 being connected to the seat cushion 11 and provided with the lumbar support 121 on a side close to the seat cushion 11, the lumbar support 121 being used to provide stable support for the waist of the user to avoid problems such as lumbar pain and lumbar muscle strain of the user. The seat cushion 11 comprises the base 112 and the seat frame 111 for placing elements such as seat cushions, the seat frame 111 being slidably arranged on the base 112, and in the process of leaning back, the part of the human body (such as the hips and thighs) in contact with the seat cushion 11 will slide forward relative to the seat back 12, and the part of the human body (such as the waist) in contact with the seat back 12 will move downward relative to the seat back 12. Since the seat frame 111 is slidable, the seat frame 111 will move forward following the hips or thighs of the human body while the human body is leaning back. In addition, the lumbar support 121 and the seat frame 111 are connected through the linkage assembly 13, and the linkage assembly 13 will drive the lumbar support 121 to move synchronously, i.e., when the seat frame 111 moves forward, the lumbar support 121 will adaptively slide and follow the downward movement of the waist of the human body, realizing linkage of the seat back, and the relative position of the lumbar support 121 and the seat frame 111 remains unchanged, and the user can still enjoy stable support in the state of leaning back. It should be noted that when the human body drives the seat frame 111 to move backward, the linkage assembly 13 will drive the lumbar support 121 to move upward synchronously.

[0030] In the embodiment, the slidable seat frame 111 is arranged to make the seat frame 111 move forward synchronously with the human body when the user leans back, avoiding the problem of unstable center of gravity caused by leaning back and avoiding the need to adjust the position again. In addition, the seat frame 111 is linked with the lumbar support 121 on the seat back 12, and the lumbar support 121 slides downward following the movement of the seat frame 111, so that the waist of the user can be supported during the process of leaning back, improving the comfort of the user and preventing the clothes from being rolled up.

[0031] Specifically, in the embodiment, the lumbar support 121 is of a ring type, and both sides have wing guards capable of closely fitting the waist, providing all-around support and protection and reducing the pressure on the lumbar vertebrae. In other embodiments, the lumbar support 121 can also be in the shape of an arch bridge, i.e., high in the middle and low on both sides, conforming to the curve of the lumbar vertebrae. In addition, the lumbar support 121 can also be internally provided with an adjusting mechanism, so that the user can adjust the angle or hardness according to individual needs.

[0032] As shown in FIG. 1, Figure 2 , Figure 3 andFigure 4 As shown, the linkage assembly 13 comprises a sliding plate 131, a first linkage rod 132, and a second linkage rod 133. The sliding plate 131 is in sliding fit with the base 112, and the sliding plate 131 is fixedly connected with the seat frame 111. One end of the first linkage rod 132 is fixedly connected with the sliding plate 131, and the other end is fixedly connected with the second linkage rod 133. The second linkage rod 133 is fixedly connected with the lumbar support 121.

[0033] In this embodiment, the sliding plate 131 is in sliding fit with the base 112, so that the sliding plate 131 can smoothly slide back and forth on the base 112, thereby driving the seat frame 111 fixedly connected therewith to move synchronously. One end of the first linkage rod 132 is fixedly connected with the sliding plate 131, and the other end is connected with the second linkage rod 133, so that the sliding plate 131 can drive the second linkage rod 133 to move synchronously when the sliding plate 131 slides. One end of the second linkage rod 133 is connected with the first linkage rod 132, and the other end is fixedly connected with the lumbar support 121, so that the lumbar support 121 can move synchronously with the sliding plate 131 when the sliding plate 131 slides, thereby ensuring that the lumbar support 121 is always close to the human waist during the reclining process. In addition, the first linkage rod 132 and the second linkage rod 133 are fixed by locking screws. A safety locking mechanism can be added between the sliding plate 131 and the base 112 or between the linkage rods, to ensure that the angle of the chair back 12 can be stably fixed when needed, preventing accidental sliding or adjustment.

[0034] The sliding plate 131, the first linkage rod 132, and the second linkage rod 133 are all made of nylon material. Nylon material has high strength and wear resistance, can withstand large loads and friction, and is not easy to damage, so that the sliding plate 131, the first linkage rod 132, and the second linkage rod 133 can maintain stable performance and structural integrity during long-term use. In addition, the material of the seat frame 111 can be nylon or polypropylene (pp).

[0035] In addition, a spring buffer mechanism can be added between the sliding plate 131 and the base 112 or between the first linkage rod 132 and the second linkage rod 133. When the seat is impacted or the user adjusts the sitting posture, the spring can absorb part of the impact force, provide a softer adjustment experience, and reduce noise. An angle sensor can also be installed on the sliding plate 131 or the linkage rod to monitor the angle change in real time. Combined with an intelligent control system (such as a mobile phone APP or a remote controller), the user can preset the angle of the chair back 12 according to personal preference, and automatically adjust to the desired position through sensor feedback.

[0036] As shown in Figure 4 and Figure 5 The linkage assembly 13 comprises a connecting piece 134, which is provided with a first connecting hole 1341 for connecting the seat frame 111 and a second connecting hole 1342 for connecting the sliding plate 131.

[0037] In the present embodiment, the connecting piece 134 can be firmly connected with the seat frame 111 through the first connecting hole 1341 by means of fasteners, such as bolts, nuts or other fasteners, to ensure the stability and reliability of the seat frame 111 during the linkage process. The second connecting hole 1342 enables the connecting piece 134 to be connected with the sliding plate 131, and the same can also be achieved by means of bolts, nuts or other fasteners. Specifically, the connecting piece 134 is made of aluminum alloy, which has excellent tensile strength and yield strength. The seat can withstand the weight of the user, the adjustment force of the chair back 12, etc., thereby ensuring the reliability and durability of the connecting piece 134. In order to increase the stability of the connection and reduce stress concentration, more connecting holes can also be added to the connecting piece 134 to achieve multi-point connection, disperse the load, reduce the stress of a single connection point, and improve the stability of the overall structure.

[0038] The sliding plate 131 is configured in a rectangular shape, and the four end corners of the sliding plate are each provided with a connecting piece 134.

[0039] In the present embodiment, the sliding plate 131 is configured in a rectangular shape, which is stable in structure and easy to process and install. The connecting piece 134 is arranged at each of the four end corners of the sliding plate 131, which can ensure that the sliding plate 131 is firmly connected with the seat frame 111. In other embodiments, the sliding plate 131 can also be configured in a circular shape, a special shape, etc.

[0040] As shown in FIGS. 1, 2 and 3, the second linkage rod 133 is provided with a connecting piece 134 at one end thereof, and the connecting piece 134 is connected with the sliding plate 131. Figure 4 and Figure 6 As shown in FIGS. 1, 2 and 3, the second linkage rod 133 is provided with a connecting piece 134 at one end thereof, and the connecting piece 134 is connected with the sliding plate 131.

[0041] In the present embodiment, one end of the support block 135 is connected with the lumbar pillow 121, and the other end is connected with the second linkage rod 133, which ensures that the lumbar pillow 121 can move synchronously with the movement of the second linkage rod 133, thereby realizing the support and adjustment functions of the lumbar pillow 121 during the reclining process of the user. In addition, in other embodiments, the support block 135 can also be provided with a cushioning material or a cushioning structure to provide additional cushioning effect between the lumbar pillow 121 and the second linkage rod 133, reduce the impact and noise generated by movement, and improve the overall comfort and durability of the seat.

[0042] The second linkage rod 133 is provided with a mounting groove 1331 at one side thereof close to the lumbar pillow 121, and the support block 135 is formed with a protrusion 1351 at one end thereof close to the second linkage rod 133, which extends into and is fixedly connected with the mounting groove 1331.

[0043] In this embodiment, the mounting groove 1331 on the second linkage rod 133 is located on the side close to the lumbar pillow 121, and its shape and size are matched with the protrusion 1351 of the support block 135, so that the protrusion 1351 can extend into the mounting groove 1331 to achieve stable connection. Through the cooperation of the protrusion 1351 and the mounting groove 1331, the support block 135 can be firmly installed on the second linkage rod 133, avoiding the problem of loosening or falling off.

[0044] The first linkage rod 132 is configured in an arc shape, and an end of the first linkage rod 132 away from the sliding plate 131 extends upward.

[0045] In this embodiment, since the second linkage rod 133 is vertically arranged to be parallel to the lumbar pillow 121, the end of the first linkage rod 132 away from the sliding plate 131 extends upward to facilitate connection with the second linkage rod 133. In addition, the arc-shaped first linkage rod 132 is close to L-shaped in shape, so that the first linkage rod 132 can adapt to the included angle between the chair back 12 and the chair seat 11, ensuring that the linkage assembly 13 always remains smooth and stable during movement. The arc-shaped design also optimizes the movement trajectory of the first linkage rod 132, enabling the first linkage rod 132 to transfer force more smoothly, reducing friction and resistance caused by angle changes, thereby improving the efficiency and durability of the linkage assembly 13.

[0046] The base 112 is provided with a plurality of guide blocks 1121 protruding from the base 112 on the side surface facing the seat frame 111, and the sliding plate 131 is arranged on the plurality of guide blocks 1121.

[0047] In this embodiment, the guide blocks 1121 provide a track or path for the sliding plate 131 to slide, ensuring that the sliding plate 131 always maintains a stable movement trajectory during sliding, reducing friction and noise, and improving sliding efficiency. The sliding plate 131 is arranged on the guide blocks 1121 and can also be in contact with the guide blocks 1121 through sliding bearings, rollers, or other sliding elements. In other embodiments, sliding rails can also be provided on the base 112 to cooperate with the sliding plate 131.

[0048] The chair back 12 includes an elastic support 122 connected to the base 112.

[0049] In the embodiment, the backrest 12 is provided with an elastic support 122 to facilitate the user to lean back. The flexibility and resilience of the elastic support 122 enable the backrest 12 to deform with the action of the user. In addition, since the support 122 is elastic, it can better fit the natural curve of the human back, improve the comfort of the user, and also help to reduce back and neck pain caused by improper sitting posture. In addition, in the embodiment, the support 122 is fixedly connected to the base 112. In other embodiments, the backrest 12 can also be rotatably connected to the base 112, in which case the elastic support 122 is not required, and the backrest 12 can also adapt to the action of the user leaning back.

[0050] The two sides of the support 122 are also provided with handrails to facilitate the user to hold. The handrails are stably connected between the support 122 to avoid loosening or falling off during normal use. At the same time, the edges of the handrails should be smoothly treated to avoid causing harm to the user. The handrails can also be configured to be adjustable, and the user can adjust the height and angle of the handrails according to personal preferences and height.

[0051] As shown in Figure 1 The embodiment also provides a seat, which comprises the leg 2 and the aforementioned seat back adjusting assembly 1.

[0052] In the embodiment, the leg 2 is a support structure of the seat to ensure that the seat can be stably placed on the ground. In the embodiment, the leg 2 can be made of metal, wood, plastic or other durable materials to ensure that the seat can withstand the weight of the user and the pressure in daily use. The bottom of the leg 2 can also be provided with universal wheels, and the user can adjust the position of the seat at any time according to the needs to adapt to different work requirements or social scenes, which not only improves the work efficiency, but also enhances the user experience.

[0053] Finally, it should be noted that the above-mentioned embodiments are only optional embodiments of the present application, and cannot be used to limit the scope of protection of the present application. Any non-substantial changes and replacements made by those skilled in the art on the basis of the present application shall fall within the scope of protection of the present application.

Claims

1. A seat back adjustment assembly for a seat, characterized in that: The seat back adjustment assembly includes a seat and a seat back connected to the seat, and a lumbar pillow for supporting the waist is provided on the side of the seat back close to the seat; the seat includes a seat frame and a base, and the seat frame can be slidably provided on the base to move closer to or away from the seat back, and the lumbar pillow and the seat frame are connected by a linkage assembly so that the lumbar pillow moves synchronously with the seat frame.

2. The seat back adjustment assembly according to claim 1, characterized in that: The linkage assembly includes a slide plate, a first linkage rod and a second linkage rod; the slide plate is slidably matched with the base, and the slide plate is fixedly connected to the seat frame; one end of the first linkage rod is fixedly connected to the slide plate, and the other end is fixedly connected to the second linkage rod; the second linkage rod is fixedly connected to the lumbar pillow.

3. The seat back adjustment assembly according to claim 2, characterized in that: The linkage assembly includes a connecting piece, and the connecting piece is provided with a first connecting hole for connecting to the seat frame and a second connecting hole for connecting to the slide plate.

4. The seat back adjustment assembly according to claim 3, characterized in that: The slide plate is rectangular in structure, and the four end corners of the slide plate are each provided with the connecting members.

5. The seat back adjustment assembly according to any one of claims 2 to 4, characterized in that: A support block is provided between the second linkage rod and the lumbar pillow. One end of the support block is connected to the lumbar pillow, and the other end is connected to the second linkage rod.

6. The seat back adjustment assembly according to claim 5, characterized in that: A mounting groove is formed on one side of the second linkage rod close to the lumbar pillow, and a protrusion is formed on one end of the support block close to the second linkage rod. The protrusion extends into and is fixed to the mounting groove.

7. The seat back adjustment assembly according to any one of claims 2 to 4, characterized in that: The first linkage rod is configured to be arc-shaped, and one end of the first linkage rod away from the slide plate extends upward.

8. The seat back adjustment assembly according to any one of claims 2 to 4, characterized in that: A plurality of guide blocks protruding from the base are provided on a side surface of the base facing the seat frame, and the slide plate is mounted on the plurality of guide blocks.

9. The seat back adjustment assembly according to any one of claims 1 to 4, characterized in that: The chair back comprises an elastic bracket connected to the base.

10. A seat, characterized in that: The utility model comprises a support leg and a seat back adjustment assembly according to any one of claims 1 to 9.

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