Linkage type chair back and seat

Abstract

The invention relates to the field of furniture, and discloses a linkage type chair back and a seat, the linkage type chair back comprises: a main frame; the driving device is arranged on the main frame and is provided with a transmission part capable of moving up and down; each supporting assembly comprises a supporting plate arranged on the main frame and a jacking and pressing part in transmission connection between the supporting plate and the transmission part, the transmission part can drive the jacking and pressing parts to jack and press the supporting plate forwards or pull the supporting plate backwards, and the multiple supporting assemblies are arranged in the vertical direction. During production, the shape of the supporting plate can be adjusted and designed according to the supporting requirements for different positions of a human body, the supporting plate can better adapt to the shapes of different parts of the human body or users with different body types, and the multiple supporting assemblies can be adjusted through power provided by the same driving device. And the vertical up-down movement of the driving device is converted into front-back adjustment of the supporting plate, so that the occupied transverse space is reduced, and packaging and transportation are facilitated.

Description

Technical Field

[0001] This invention relates to the field of furniture and discloses a linked chair back and seat. Background Technology

[0002] To improve chair back comfort, current chair backs are equipped with lumbar support structures. However, fixed lumbar supports lack flexibility and are difficult to adapt to the needs of different users. Some lumbar supports are designed with an adjustable structure that can be adjusted and positioned in the forward and backward direction. However, this type of lumbar support usually uses telescopic rods or screws for adjustment in the forward and backward direction, which requires a large lateral space, affecting the overall appearance and hindering packaging and transportation. Therefore, there is an urgent need for a chair back with adjustable support function and a smaller lateral space requirement. Summary of the Invention

[0003] The purpose of this invention is to provide a linked chair back and seat to solve one or more technical problems existing in the prior art, and at least provide a beneficial option or create conditions.

[0004] According to a first aspect of the present invention, a linkage-type chair back includes: a main frame; a drive device disposed on the main frame, the drive device having a transmission member that can move up and down; and a support assembly including a support plate disposed on the main frame and a pressing part that is transmissionally connected between the support plate and the transmission member, the transmission member being capable of driving the pressing part to press the support plate forward or pull the support plate backward, and a plurality of support assemblies being disposed in the vertical direction.

[0005] This technical solution has at least the following beneficial effects: The main frame serves as the basic support structure, and the drive device is fixed to the main frame. The drive device provides driving force for vertical movement. During use, the user leans back against the support plate. When it is necessary to adjust the support state of the support plate for the user, the transmission component in the drive device moves up and down, transmitting force to the support plate through the pressing part, causing it to push forward, thus enhancing the forward support force for the user. Alternatively, the support plate can be pulled backward, reducing the support force for the user. Since multiple support components are arranged vertically along the main frame, the shape of the support plate can be adjusted during production according to the support needs of different parts of the human body, better adapting to the shape of different parts of the human body or users of different body types, further improving the user experience. Furthermore, multiple support components can be adjusted by the same drive device, simplifying the overall drive structure. The drive device converts vertical up-and-down movement into front-and-back adjustment of the support plate, reducing lateral space occupation and facilitating packaging and transportation.

[0006] According to some embodiments of the present invention, the support assembly includes a connecting portion connected between the support plate and the main frame. The connecting portion forms a first connecting point at the position where it is connected to the support plate, and forms a second connecting point at the position where it is connected to the main frame. The first connecting point and the second connecting point may be close to or far from each other.

[0007] According to some embodiments of the present invention, the connecting part includes connecting wings connected to the left and right sides of the support plate, two connecting wings are respectively connected to the main frame, the positions where the two connecting wings are connected to the support plate respectively form first connecting points, the positions where the two connecting wings are connected to the main frame respectively form second connecting points, and the two connecting wings can elastically deform in a direction that moves closer to or further away from each other.

[0008] According to some embodiments of the present invention, the support plate is in the shape of an arc with the opening facing forward, and the pressing part presses the middle part of the support plate forward, thereby reducing the arc curvature of the support plate, or the pressing part pulls the middle part of the support plate backward, thereby increasing the arc curvature of the support plate.

[0009] According to some embodiments of the present invention, the top pressing part includes a transmission rod, the two ends of which are rotatably connected to the transmission member and the support plate, respectively.

[0010] According to some embodiments of the present invention, multiple transmission rods are provided at intervals along the vertical direction.

[0011] According to some embodiments of the present invention, a connecting frame is further provided between the support plate and the transmission rod. The connecting frame is rotatably connected to the rear side of the support plate about an axis in the vertical direction, and the end of the transmission rod is rotatably connected to the connecting frame about an axis in the horizontal direction.

[0012] According to some embodiments of the present invention, a connecting piece is connected between the middle part of the uppermost support plate and the main frame.

[0013] According to some embodiments of the present invention, there are two support components, and in the same support component, there are two support plates arranged in the vertical direction.

[0014] A chair includes a seat, the aforementioned linked backrest, and a main frame connected to the seat.

[0015] The technical solution has at least the following beneficial effects: Due to the use of the above-mentioned linkage chair back, the shape of the support plate can be adjusted during production according to the support needs of different parts of the human body, better adapting to the shape of different parts of the human body or users of different body types, further improving the user experience. In addition, multiple support components can be adjusted by the same drive device, simplifying the overall drive structure. The drive device converts vertical up-and-down movement into front-and-back adjustment of the support plate, reducing the lateral space occupation and facilitating packaging and transportation.

[0016] Additional aspects and advantages of the 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] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly explained below. Obviously, the described drawings are only a part of the embodiments of the present invention, and not all of them. Those skilled in the art can obtain other design schemes and drawings based on these drawings without creative effort.

[0018] Figure 1 This is a three-dimensional view of the linked chair back when the support plate of the present invention is pulled backward.

[0019] Figure 2 This is a first perspective view of the linked chair back when the support plate of the present invention is pressed forward.

[0020] Figure 3 This is a first perspective view of the linked chair back when the support plate of the present invention is pressed forward.

[0021] In the attached diagram: 100-main frame, 210-transmission component, 220-motor, 230-screw, 310-support plate, 320-connecting wing, 330-transmission rod, 340-connecting piece, 350-connecting frame. Detailed Implementation

[0022] Embodiments of the present invention 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 the present invention, and should not be construed as limiting the present invention.

[0023] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention 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 limiting this invention.

[0024] In the description of this invention, "several" means one or more, "more than" 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.

[0025] In the description of this invention, unless otherwise explicitly defined, terms such as "set up," "install," and "connect" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution.

[0026] In the description of this application, unless otherwise expressly specified and limited, the terms "set up," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0027] In the description of this application, the use of terms such as "one embodiment," "some embodiments," "an example," "some instances," "some embodiments," "illustrative embodiment," "example," "specific example," and "some examples" indicates that the specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0028] Reference Figures 1 to 3According to a first aspect of the present invention, a linked chair back includes a main frame 100, a drive device, and a support assembly. The drive device is disposed on the main frame 100 and has a transmission member 210 that can move up and down. The support assembly includes a support plate 310 disposed on the main frame 100 and a pressing part that is transmissionally connected between the support plate 310 and the transmission member 210. The transmission member 210 can drive the pressing part to press the support plate 310 forward or pull the support plate 310 backward.

[0029] As described above, the main frame 100 serves as the basic support structure, and the drive device is fixed to the main frame 100. The drive device provides driving force for vertical movement. In use, the user leans back against the support plate 310. When it is necessary to adjust the support state of the support plate 310 for the user, the transmission component 210 in the drive device moves up and down, transmitting force to the support plate 310 through the pressing part, causing it to push forward, enhancing the forward support force for the user, or pulling the support plate 310 backward, reducing the support force for the user. Since multiple support components are arranged vertically along the main frame 100, the shape of the support plate 310 can be adjusted during production according to the support needs of different parts of the human body, better adapting to the shape of different parts of the human body or users of different body types, further improving the user experience. Moreover, multiple support components can be adjusted by the same drive device, simplifying the overall drive structure. The drive device converts vertical up-and-down movement into front-and-back adjustment of the support plate 310, reducing the lateral space occupation and facilitating packaging and transportation.

[0030] The drive unit is mainly used to provide driving force in the vertical direction through the transmission component 210. It has various structural forms; for example, the drive unit can be a motor 220, a lead screw, an electric actuator, a cylinder, or a hydraulic cylinder. For instance, when the drive unit uses an electric lead screw, it includes a motor 220 and a lead screw 230. The motor 220 drives and connects to the lead screw 230, and the transmission component 210 is threadedly connected to the lead screw 230. The transmission component 210 is slidably connected to the main frame 100 in the vertical direction. In this embodiment, because the transmission component 210 is threadedly connected to the lead screw 230 and slidably connected to the main frame 100 in the vertical direction, when the motor 220 drives the lead screw 230 to rotate, the rotation can be converted into the vertical movement of the transmission component 210.

[0031] A connecting structure can be provided between the support plate 310 and the main frame 100 to further improve the stability of the support plate 310's forward and backward movement. In this embodiment, the support assembly includes a connecting part connecting the support plate 310 and the main frame 100. The connecting part forms a first connecting point at the position where it connects to the support plate 310, and a second connecting point at the position where it connects to the main frame 100. The first connecting point and the second connecting point can move closer to or further away from each other. The connecting part has a first connecting point and a second connecting point that can move closer to or further away from each other in the forward and backward direction. The first connecting point and the second connecting point form a connection constraint between the support plate 310 and the main frame 100, which does not restrict the degree of freedom of movement of the support plate 310 during forward and backward adjustment, thereby improving the structural stability of the support plate 310.

[0032] The connecting part can adopt a telescopic rod structure or a linkage mechanism structure. In this embodiment, the connecting part includes connecting wings 320 connected to the left and right sides of the support plate 310. Two connecting wings 320 are respectively connected to the main frame 100. The positions where the two connecting wings 320 connect to the support plate 310 respectively form first connection points, and the positions where the two connecting wings 320 connect to the main frame 100 respectively form second connection points. The two connecting wings 320 can elastically deform in directions that move closer to or further away from each other. The two connecting wings 320 form a connecting constraint on both sides of the support plate 310, preventing support offset caused by unilateral deformation. Furthermore, utilizing the elastic deformation of the connecting wings 320, when the support plate 310 is pushed forward, the two connecting wings 320 expand outward on both sides of the support plate 310, improving forward support performance. When the support is pulled backward, the two connecting wings 320 bend inward on both sides of the support plate 310, gradually moving closer together, always maintaining the support effect on both sides of the support plate 310.

[0033] To improve the comfort of using the support plate 310, in this embodiment, the support plate 310 is an arc shape with its opening facing forward. The pressing part presses the middle part of the support plate 310 forward, reducing the arc curvature of the support plate 310; or the pressing part pulls the middle part of the support plate 310 backward, increasing the arc curvature of the support plate 310. The arc-shaped support plate 310 conforms to the physiological curve of the human lumbar spine. When the support plate 310 is pushed forward, the middle part of the plate protrudes forward, enhancing the support stability of the support plate 310. When the support plate 310 is pulled backward, the arc curvature of the support plate 310 increases, and the overall arc bending degree increases, forming a wrapping effect and improving the comfort of use.

[0034] There are various structural forms for the top-pressing part. For example, the top-pressing part can adopt a scissor-type linkage. When the transmission member 210 moves in the vertical direction, it can drive the scissor-type linkage to unfold, thereby achieving front-pressing of the support plate 310, or drive the scissor-type linkage to fold, thereby achieving rear-pulling of the support plate 310. In this embodiment, the top-pressing part includes a transmission rod 330, the two ends of which are rotatably connected to the transmission member 210 and the support plate 310, respectively. When the transmission member 210 moves in the vertical direction, it can drive the transmission rod 330 to deflect to a more horizontal state or to a more vertical state, thereby converting the vertical movement of the transmission member 210 into the forward and backward adjustment power of the support plate 310, achieving front-pressing or rear-pulling of the support plate 310.

[0035] Furthermore, multiple transmission rods 330 are spaced apart along the vertical direction. These multiple transmission rods 330 form a parallel linkage mechanism between the transmission member 210 and the support plate 310, which improves the structural stability of the support plate 310. For example, if there are two transmission rods 330, a parallel four-bar linkage is formed between the support plate 310, the transmission member 210, and the two transmission rods 330, enabling stable power transmission to the support plate 310.

[0036] In the above embodiment, the transmission rod 330 can be directly rotatably connected to the rear side of the support plate 310. Since the support plate 310 will undergo elastic deformation when it is pressed forward, in order to ensure the stability of the connection structure between the transmission rod 330 and the support plate 310, in this embodiment, a connecting frame 350 is also provided between the support plate 310 and the transmission rod 330. The connecting frame 350 is rotatably connected to the rear side of the support plate 310 around the vertical axis, and the end of the transmission rod 330 is rotatably connected to the connecting frame 350 around the horizontal axis. In practical applications, the connecting frame 350 can either form a rotation connection point only in the middle of the support plate 310, or it can form two rotation connection points in the left and right directions of the support plate 310, further improving the stability of the support for the support plate 310. The transmission rod 330 is connected to the support plate 310 via a connecting rod. At this time, the transmission rod 330 can rotate directly up and down relative to the support plate 310, and can also adapt to the elastic deformation of the support plate 310, ensuring a stable structural connection between the transmission rod 330 and the support plate 310.

[0037] In some embodiments, a connecting piece 340 is connected between the middle of the uppermost support plate 310 and the main frame 100. The uppermost support plate 310 provides support for the head, and the connecting piece 340 further connects the middle of the support plate 310 to the main frame 100, stabilizing the position of the middle of the support plate 310. When the transmission rod 330 presses the support plate 310 forward through the connecting frame 350, the arc deformation of the support plate 310 can be further increased, thereby further improving the wrapping effect of the support plate 310.

[0038] The number of support components can be one or more. For example, when there is only one support component, the support plate 310 is a single plate, providing support for the user's entire back, head, and other areas. In this embodiment, there are two support components, with two support plates 310 arranged vertically within the same support component. Within the same support component, a connecting wing 320 on the main frame 100 forms two connecting portions, which extend to the same side of the two support plates 310, providing support for them. This results in four support plates 310, providing support for the waist, back, shoulders, and head of the human body, respectively. This better adapts to the physiological needs of different segments of the lumbar spine, and the modular structure facilitates maintenance and replacement, reducing maintenance costs.

[0039] A chair includes a seat, the aforementioned linked backrest, and a main frame 100 connected to the seat.

[0040] In this seat, due to the use of the aforementioned linked backrest, the shape of the support plate 310 can be adjusted during production according to the support needs of different parts of the human body, better adapting to the shape of different parts of the human body or users of different body types, further improving the user experience. In addition, multiple support components can be adjusted by the same drive device, simplifying the overall drive structure. The drive device converts vertical up-and-down movement into front-and-back adjustment of the support plate 310, reducing lateral space occupation and facilitating packaging and transportation.

[0041] The preferred embodiments of the present invention have been described in detail above, but the present invention is not limited to the embodiments described. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present invention, and these equivalent modifications or substitutions are all included within the scope defined by the claims of this application.

Claims

1. A linked chair back, characterized in that: include: Main frame (100); A drive unit is provided on the main frame (100), and the drive unit has a transmission component (210) that can move up and down. The support assembly includes a support plate (310) disposed on the main frame (100) and a pressing part that is drively connected between the support plate (310) and the transmission member (210). The transmission member (210) can drive the pressing part to press the support plate (310) forward or pull the support plate (310) backward. The support assembly is provided with a plurality of such components along the vertical direction.

2. The linked chair back according to claim 1, characterized in that: The support assembly includes a connecting part that connects the support plate (310) and the main frame (100). The connecting part forms a first connection point at the position where it connects to the support plate (310), and forms a second connection point at the position where it connects to the main frame (100). The first connection point and the second connection point can be close to or far from each other.

3. The linked chair back according to claim 2, characterized in that: The connecting part includes connecting wings (320) connected to the left and right sides of the support plate (310). The two connecting wings (320) are respectively connected to the main frame (100). The positions where the two connecting wings (320) are connected to the support plate (310) respectively form first connection points, and the positions where the two connecting wings (320) are connected to the main frame (100) respectively form second connection points. The two connecting wings (320) can elastically deform in the direction of moving closer to or further away from each other.

4. The linked chair back according to claim 3, characterized in that: The support plate (310) is an arc shape with the opening facing forward. The pressing part presses the middle part of the support plate (310) forward and makes the arc curvature of the support plate (310) smaller, or the pressing part pulls the middle part of the support plate (310) backward and makes the arc curvature of the support plate (310) larger.

5. The linked chair back according to claim 1, characterized in that: The top pressing part includes a transmission rod (330), and the two ends of the transmission rod (330) are rotatably connected to the transmission member (210) and the support plate (310), respectively.

6. The linked chair back according to claim 5, characterized in that: The transmission rod (330) is provided in multiple intervals along the vertical direction.

7. The linked chair back according to claim 5, characterized in that: A connecting frame (350) is also provided between the support plate (310) and the transmission rod (330). The connecting frame (350) is rotatably connected to the rear side of the support plate (310) about the vertical axis, and the end of the transmission rod (330) is rotatably connected to the connecting frame (350) about the horizontal axis.

8. The linked chair back according to claim 7, characterized in that: A connecting piece (340) is connected between the middle of the uppermost support plate (310) and the main frame (100).

9. The linked chair back according to claim 1, characterized in that: There are two support components, and in the same support component, there are two support plates (310) arranged in the vertical direction.

10. A type of seat, characterized in that: Includes a seat and a linked backrest as described in any one of claims 1 to 9, wherein the main frame (100) is connected to the seat.

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