Seat backrest and seat based on layer structure

Abstract

This invention discloses a layered structure seat back and seat, comprising: a backrest structure panel; a first airbag layer disposed on the front side of the backrest structure panel for supporting the user's waist and / or back when inflated; a first insulating surface disposed on the front side of the first airbag layer; a second airbag layer disposed on the front side of the first insulating surface, the first insulating surface separating the first airbag layer and the second airbag layer to prevent direct contact between them when the airbags inflate; and a front end surface of the backrest disposed on the front side of the second airbag layer for contact with the surface required by the human body. By adding a second airbag layer, the overall inflated height of the airbags in the layered structure seat back is increased; furthermore, by separating the first airbag layer and the second airbag layer by the first insulating surface, friction noise is avoided, as well as undesirable misalignment caused by friction, and problems such as airbag inflation direction deviation and failure to return to normal position are also avoided.

Description

Technical Field

[0001] This invention relates to the field of seating technology, and more particularly to a seat back and seat based on a layered structure. Background Technology

[0002] Airbag structures are widely used in daily life as adjustable support components. For example, they are used in layered seat backs. By adding airbag structures inside the backrest, the inflation of the airbags can support the lower back and achieve various functions, such as lumbar support and massage.

[0003] Chinese patent document CN112089246A discloses a back support device, including a backrest panel; a flexible backrest / lumbar support, which includes air cushions disposed on the backrest panel; and an adaptive control system, including a main controller, an air supply device for inflating the air cushions, a pressure regulating valve for controlling the amount of gas inside the air cushions, and a pressure sensor for collecting the internal air pressure of the air cushions. This prior art effectively supports the user's lower back by controlling the inflation height of the air cushions to always fit snugly, and by changing the support force on the lower back, thus reducing damage to the lumbar spine caused by prolonged sitting.

[0004] However, this existing technology has the following drawbacks in practical use:

[0005] 1. The existing technology's cushion airbag is a single-layer airbag, which has a limited inflatable height after inflation, i.e., a limited working distance. When the user leans forward on the seat, the single-layer airbag cannot truly and effectively support the user.

[0006] 2. If the single-layer airbag is replaced with the welded multi-layer airbag in the existing technology, the airbags between the layers will rub against each other when inflated, which will generate noise, affect the user experience, and may even cause unwanted inflation direction deviation and failure to return to normal position after friction misalignment.

[0007] 3. It only provides lumbar support and has limited functionality. Summary of the Invention

[0008] The purpose of this invention is to provide a seat backrest based on a layered structure to solve the technical problems in the prior art where the working distance of a single-layer airbag is limited and cannot effectively support the user, and where welded multi-layer airbags generate noise, undesirable inflation direction deviation, and failure to return to normal position after friction misalignment when inflated.

[0009] To achieve this objective, the present invention adopts the following technical solution:

[0010] A first aspect of the present invention provides a seat back based on a layered structure, comprising: a back structure panel; a first airbag layer disposed on the front side of the back structure panel for supporting the waist and / or back of a human body when inflated; a first insulating surface disposed on the front side of the first airbag layer; a second airbag layer disposed on the front side of the first insulating surface, wherein the first insulating surface separates the first airbag layer and the second airbag layer to prevent them from directly contacting each other when the airbags are inflated; a front end surface of the backrest disposed on the front side of the second airbag layer, wherein the front end surface of the backrest is a fabric layer for contacting the surface required by the human body, and the front end surface of the backrest is attached to the back structure panel to enclose the first airbag layer, the first insulating surface, and the second airbag layer in the space between them.

[0011] Optionally, the first isolation surface is a flexible surface.

[0012] Optionally, the first insulating surface is a cloth bag attached to the back of the front end of the backrest, and the second airbag layer is placed in the cloth bag.

[0013] Optionally, the second airbag layer includes multiple airbags, and the first insulating surface is a plurality of fabric bags connected to the back of the front end of the backrest, with the multiple airbags respectively placed in the multiple fabric bags.

[0014] Optionally, the second airbag layer is connected to the front side of the first isolation surface, and an auxiliary airbag layer is connected to the rear side of the first isolation surface. The auxiliary airbag layer is offset from the second airbag layer so that the inflation of the auxiliary airbag layer can change the inflation direction of the second airbag layer.

[0015] Optionally, the first isolation surface is a rigid plate, and the second airbag layer is installed on the front side of the rigid plate. The rigid plate is elastically connected to the edge of the back structure plate. When the back structure plate is not parallel to the human body's required surface, the second airbag layer on the rigid plate is adaptively rotated to the human body's required surface by rotating the rigid plate along the surface of the first airbag layer after inflation.

[0016] Optionally, the second airbag layer includes a plurality of airbags, at least one of which is slidably connected to the rigid plate.

[0017] Optionally, the layered seat back also includes:

[0018] The second isolation surface is located on the front side of the second airbag layer;

[0019] The third airbag layer is located on the front side of the second isolation surface and the rear side of the front end surface of the backrest. The second isolation surface separates the second airbag layer and the third airbag layer to prevent them from directly contacting each other when the airbag is inflated. The third airbag layer is a single-layer airbag that can be inflated and hardened within a short period of time.

[0020] Optionally, the first airbag layer includes a large airbag at the bottom of the back structure plate for supporting the lower back, a first small airbag in the middle of the back structure plate, and a flat, elongated airbag at the upper part of the back structure plate for supporting the upper back and neck; and / or, the second airbag layer includes a second small airbag on the upper side of the middle, a third small airbag on the lower side of the middle, a first elongated airbag on the left and a second elongated airbag on the right, the second small airbag and the third small airbag being located directly in front of the large airbag at the bottom of the back structure plate, the first elongated airbag and the second elongated airbag being symmetrical to the left and right for wrapping the waist.

[0021] Optionally, the front surface of the backrest has a composite multi-layer structure, which includes: a fabric layer adapted to face the human body and having breathability and / or waterproofness; a support layer for controlling the overall softness and hardness of the front surface of the backrest; and a temperature control layer for controlling the surface temperature of the front surface of the backrest.

[0022] Optionally, each airbag can be inflated or deflated individually.

[0023] A second aspect of the present invention provides a seat, including the aforementioned layered seat back.

[0024] The beneficial effects of this invention are:

[0025] 1. The layered seat back provided by this invention includes a first airbag layer and a second airbag layer. The second airbag layer is disposed in front of the first airbag layer. Compared with the prior art, by adding a second airbag layer, the overall inflated height of the airbags in the layered seat back is increased, thus increasing the working distance of the airbags. Especially when the user leans forward on the seat, the airbags of this invention can effectively support the user. In addition, this invention also includes a first insulating surface, which separates the first airbag layer and the second airbag layer to prevent them from directly contacting each other when the airbags inflate. Since the surface of the airbag is relatively hard after inflation, Without the first insulating surface, the airbags of the first and second airbag layers would directly contact each other after inflation, causing friction and noise that would affect the user experience. Friction could also lead to undesirable inflation direction shifts and misalignment that prevents proper return to its original position. This invention, by separating the first and second airbag layers with the first insulating surface, prevents direct contact, thus avoiding friction noise, undesirable misalignment due to friction, and the inflation direction shift of the airbags. It also prevents the airbags from failing to return to their original position after deflation due to friction misalignment.

[0026] 2. The seat backrest based on a layered structure provided by the present invention sets the first isolation surface as a flexible surface, so that after the first airbag layer is inflated, it pushes the airbag of the second airbag layer on the front side through the flexible first isolation surface. Through the design of the pushing part, the inflation of the first airbag layer can control the inflation direction of the airbag of the second airbag layer. And because the first isolation surface is a flexible surface, the airbags of the first and second airbag layers can also return to their normal positions after deflation.

[0027] 3. The seat backrest based on a layered structure provided by the present invention has a first isolation surface as a cloth bag connected to the back of the front end of the seat backrest, and a second airbag layer placed in the cloth bag. First, the cloth bag constrains the second airbag layer to prevent the airbags of the second airbag layer from escaping from the preset position. Second, the design of the cloth bag makes the installation of the second airbag layer more convenient. It is only necessary to place the airbags of the second airbag layer into the cloth bag, thereby improving the overall assembly efficiency of the seat.

[0028] 4. The seat backrest based on a layered structure provided by the present invention has a second airbag layer fixedly connected to the front side of the first isolation surface, and an auxiliary airbag layer connected to the rear side of the first isolation surface. The auxiliary airbag layer and the second airbag layer are offset from each other, so that after the auxiliary airbag layer is inflated, it can push the second airbag layer through the first isolation surface to change the inflation direction of the second airbag layer.

[0029] 5. The seat backrest based on a layered structure provided by the present invention has a first isolation surface as a rigid board and a second airbag layer installed on the front side of the rigid board. The rigid board and the back structure board are elastically connected at the edge. When the back structure board and the human body's required surface are not parallel, the second airbag layer on the rigid board is adaptively rotated to the human body's required surface by rotating the rigid board along the surface of the first airbag layer after inflation, thus realizing automatic following of the human body's required surface.

[0030] 6. The layered structure seat back provided by this invention has a first insulating surface made of a rigid board, and a second airbag layer comprising multiple airbags. At least one of the multiple airbags is slidably connected to the rigid board. This slidable connection allows the coordinate position of the airbag relative to the rigid board to be changed, thereby altering the support position for the user and enabling more functions. Furthermore, the airbag slidably connected to the rigid board can also act as an auxiliary airbag, applying a pushing force to the airbag located at the front, thereby controlling the inflation direction of the airbag located at the front.

[0031] 7. The seat backrest based on the layer structure provided by the present invention further includes a second isolation surface and a third airbag layer. The second isolation surface is located on the front side of the second airbag layer, and the third airbag layer is located on the front side of the second isolation surface and the rear side of the front end surface of the backrest. The second isolation surface separates the second airbag layer and the third airbag layer to prevent them from directly contacting each other when the airbag is inflated. The third airbag layer is a single-layer airbag that can inflate and harden in a short period of time, providing the user with a strong sense of stimulation.

[0032] 8. The layered structure-based seat back provided by this invention has a composite multi-layered structure at its front end, including a fabric layer, a support layer, and a temperature-regulating layer. The fabric layer is suitable for the human body and has breathability and waterproofness. The support layer is used to control the overall softness and hardness of the front end of the seat back, and the temperature-regulating layer is used to control the surface temperature of the front end of the seat back. While being waterproof, the fabric layer allows sweat and water vapor to escape smoothly from the contact surface, keeping it dry. The choice of the support layer can control the softness and hardness felt by the user. The temperature-regulating layer can control the surface temperature of the layered structure-based seat back. Attached Figure Description

[0033] Figure 1 This is an exploded view of the layered structure-based seat back provided in Embodiment 1 of the present invention;

[0034] Figure 2 yes Figure 1 Another view;

[0035] Figure 3 This is a front view of the seat back based on a layered structure provided in Embodiment 1 of the present invention (the front end of the seat back is not shown);

[0036] Figure 4This is a perspective view of a seat backrest based on a layered structure provided in Embodiment 1 of the present invention (the front end of the seat backrest is not shown);

[0037] Figure 5 This is a diagram showing the fit between the first airbag layer and the second airbag layer without a first isolation surface.

[0038] Figure 6 This is a schematic diagram of the structure of a seat back based on a layered structure provided in Embodiment 3 of the present invention (first airbag layer inflated state);

[0039] Figure 7 This is a diagram showing the combination of the first airbag layer (bulging state), the rigid board, and the second airbag layer of the seat back based on a layered structure provided in Embodiment 3 of the present invention.

[0040] Figure 8 This is a schematic diagram of the structure of a seat backrest based on a layered structure provided in Embodiment 3 of the present invention (the first airbag layer is not inflated).

[0041] Figure 9 This is an exploded view of the layered structure-based seat back provided in Embodiment 5 of the present invention (not showing all airbags);

[0042] Figure 10 This is a schematic diagram of the front surface of the seat back based on a layered structure provided in Embodiment 6 of the present invention.

[0043] In the picture:

[0044] 1- Back structure panel;

[0045] 2-First airbag layer, 21-Large airbag, 22-First small airbag, 23-Elongated flat airbag;

[0046] 3-First isolation surface, 31-Cloth bag, 32-Rigid board;

[0047] 4-Second airbag layer, 41-Second small airbag, 42-Third small airbag, 43-First elongated airbag, 44-Second elongated airbag;

[0048] 5-Second isolation surface;

[0049] 6-Third air sac layer;

[0050] 7-Front end of backrest, 71-Fabric layer, 72-Support layer, 73-Temperature control layer;

[0051] 8-Human body, 81-Human body needs. Detailed Implementation

[0052] To make the technical problems solved by the present invention, the technical solutions adopted, and the technical effects achieved clearer, the technical solutions of the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0053] In the description of this invention, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0054] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0055] The technical solution of the present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0056] This invention provides a layered seat back, comprising, from rear to front, a back structure panel 1, a first airbag layer 2, a first insulating surface 3, a second airbag layer 4, and a front end surface 7. The first airbag layer 2 is located on the front side of the back structure panel 1 and provides support for the user's waist and / or back. The first insulating surface 3 is located on the front side of the first airbag layer 2, and the second airbag layer 4 is located on the front side of the first insulating surface 3. The first insulating surface 3 separates the first airbag layer 2 and the second airbag layer 4 to prevent direct contact when the airbags inflate. The front end surface 7 is located on the front side of the second airbag layer 4 and has a fabric layer for contact with the body's ergonomic surface 81. The front end surface 7 is attached to the back structure panel 1 to enclose the first airbag layer 2, the first insulating surface 3, and the second airbag layer 4 in the space between them.

[0057] It's important to note that human needs are generally categorized into two types: active and passive. Active: When a user experiences discomfort, fatigue, or drowsiness, certain areas may experience specific aches, numbness, or other negative physical sensations. These areas represent the user's actively generated needs (defined as the need to alleviate these negative sensations). For example, a user who has been sitting for a long time may experience lower back pain and actively seek massage / support from a chair to relieve the pain. In this case, the user's lower back is an active need area. Passive: Even if the user doesn't feel discomfort, but postural or physiological studies and consensus indicate that certain body parts exhibit passive needs when the user performs a certain action, these areas represent the user's passively generated needs (defined as the need to prevent negative physical sensations). For example, a user who has been sitting for a long time may experience lower back pain, and a chair may automatically activate massage / support to prevent this pain. In this case, the user's lower back is a passive need area.

[0058] The layered seat back provided in this embodiment of the invention, compared with the prior art, increases the overall inflation height of the airbags after inflation by adding a second airbag layer 4, thus increasing the working distance of the airbags. Especially when the user leans forward on the seat, the overall airbag structure of the layered seat back provided in this embodiment of the invention can effectively support the user. In addition, since the surface of the airbag is relatively hard after inflation, without the first isolation surface 3, the airbags of the first airbag layer 2 and the airbags of the second airbag layer 4 will directly contact each other after inflation, causing friction and noise that affects the user experience. It may even cause undesirable inflation direction deviation and failure to return to normal position after friction misalignment. However, by separating the first airbag layer 2 and the second airbag layer 4 with the first isolation surface 3, the two will not form direct contact, thus avoiding the problem of friction noise. At the same time, it can also avoid the problem of undesirable misalignment and airbag inflation direction deviation caused by friction, and also avoid the problem of the airbag failing to return to normal position after deflation due to friction misalignment.

[0059] It should be noted that the above structure is the core structure of the embodiments of the present invention. Those skilled in the art should understand that the addition of a second isolation surface 5, a third airbag layer 6, a third isolation surface and a fourth airbag layer on the basis of the above core structure should all fall within the protection scope of the present invention.

[0060] Based on the above core structure, the embodiments of the present invention propose the following specific embodiments of seat backrests based on layered structures.

[0061] Example 1

[0062] Figure 1 This is a front view of the seat back based on a layered structure provided in Embodiment 1 of the present invention; Figure 2 This is a perspective view of a seat backrest based on a layered structure provided in Embodiment 1 of the present invention; Figure 3This is an exploded view of the layered structure-based seat back provided in Embodiment 1 of the present invention; Figure 4 yes Figure 3 Another view.

[0063] like Figures 1 to 4 As shown, this embodiment provides a seat back with a layered structure having two airbag layers. The seat back with the layered structure includes, from the rear to the front, a back structure plate 1, a first airbag layer 2, a first isolation surface 3, a second airbag layer 4, and a front end surface 7 of the backrest.

[0064] The backrest structure panel 1 is preferably a plastic structure panel with a certain degree of rigidity, but the material of the backrest structure panel 1 is not limited to plastic structure panel. In some other embodiments, the backrest structure panel 1 can also be made of metal plate, wood plate, etc. The backrest structure panel 1 is also not limited to a hard material. In some embodiments, the backrest structure panel 1 can also be made of a soft material. For example, when a layered seat back is attached to a hard substrate such as a wall, the backrest structure panel 1 can be made of a soft material such as fabric, and is attached to the hard substrate during use. The shape of the backrest structure panel 1 is not limited in this invention; the backrest structure panel 1 can be made of, for example... Figures 1 to 4 The shapes shown can also be other commonly used shapes, or they can be customized according to requirements, such as triangles, trapezoids, circles, ellipses, etc.

[0065] like Figure 1 As shown, the first airbag layer 2 includes a large airbag 21 for supporting the lower back, disposed at the bottom of the back structure plate; a first small airbag 22 disposed in the middle of the back structure plate; and a flat and elongated airbag 23 disposed at the upper part of the back structure plate for supporting the upper back and neck.

[0066] Furthermore, the large airbag 21 is preferably a large multi-layer airbag, such as a large two-layer airbag, a large three-layer airbag, or a large four-layer airbag. In this embodiment, a large three-layer airbag is preferred to provide extensive support for the user's lower back. The first small airbag 22 is preferably a small multi-layer airbag, and more preferably a small three-layer airbag, responsible for supporting and massaging the user's upper back. The flat, elongated airbag 23 is preferably a double-layer flat, elongated airbag 23, used to support the upper back and neck and shoulders.

[0067] It should be noted that the airbags mentioned above can also be single-layer airbags, double-layer airbags, four-layer airbags, etc., depending on actual needs.

[0068] The first insulating surface 3 is located between the first airbag layer 2 and the second airbag layer 4, separating the two airbag layers and allowing them to fully utilize their respective characteristics. In this embodiment, the first insulating surface 3 is a flexible surface, preferably made of fabric. The advantages of using a flexible surface are: First, the flexible surface acts as a buffer layer. Since the surface of the inflated airbag is relatively hard, if the hard airbag surface comes into contact with the hard insulating surface, friction noise will be generated. However, the contact between the hard airbag surface and the flexible surface will greatly reduce friction noise, or even eliminate it, significantly improving the user experience. Second, the flexible surface does not affect the performance of the respective characteristics of the first airbag layer 2 and the second airbag layer 4. The first airbag layer 2 and the second airbag layer 4 can inflate in the expected direction. When the airbag of the first airbag layer 2 and the second airbag layer 4 inflate in the expected direction, the airbag of the first airbag layer 2 and the second airbag layer 4 will inflate in the expected direction. When the airbags of the two airbag layers 4 are set facing each other, both airbags can inflate towards the front. When the airbags of the first airbag layer 2 and the second airbag layer 4 are misaligned, the airbag of the first airbag layer 2 located at the rear can push the airbag of the second airbag layer 4 located at the front to deflect. That is, the airbag of the first airbag layer 2 can control the inflation direction of the second airbag layer 4 through misalignment and flexible surface. For example, when the airbag of the first airbag layer 2 is located below the airbag of the second airbag layer 4, the airbag of the first airbag layer 2 inflates and pushes the lower part of the airbag of the second airbag layer 4, causing the airbag of the second airbag layer 4 to deflect upward.

[0069] Furthermore, the first isolation surface 3 is preferably a cloth bag 31 connected to the back of the front end surface 7 of the backrest, and the second airbag layer 4 is placed in the cloth bag 31. The advantages of using the cloth bag 31 are: firstly, the cloth bag 31 restrains the second airbag layer 4, preventing the airbag of the second airbag layer 4 from escaping from the preset position; secondly, the design of the cloth bag 31 makes the installation of the second airbag layer 4 more convenient, as the airbag of the second airbag layer 4 only needs to be placed in the cloth bag 31, thus improving the overall assembly efficiency of the seat.

[0070] More preferably, the second airbag layer 4 includes multiple airbags, and the first insulating surface 3 is a plurality of fabric bags 31 disposed on the back of the front end surface 7 of the backrest, wherein the plurality of airbags are respectively placed in the plurality of fabric bags 31. Figure 2 As shown, the first isolation surface 3 consists of three fabric pockets 31 connected to the back of the front end surface 7 of the backrest. The two elongated airbags of the second airbag layer 4 are placed in the fabric pockets 31 on both sides, and the two small airbags in the middle are placed in the middle fabric pocket 31. Each fabric pocket 31 has a zipper; zipping it up after the airbags are placed in the pockets prevents the airbags from shifting or escaping. Furthermore, the airbags are usually connected to an air tube for inflation. Placing the airbags in the fabric pockets prevents the airbags from shifting and causing the air tubes to fold. By constraining the position of the airbags within the fabric pockets, the problem of airbag suffocation due to air tube folding can be significantly reduced.

[0071] In this embodiment, the specific structure of the second airbag layer 4 is as follows: it includes a second small airbag 41 located on the upper side of the middle, a third small airbag 42 located on the lower side of the middle, a first elongated airbag 43 on the left and a second elongated airbag 44 on the right. The second small airbag 41 and the third small airbag 42 are located directly in front of the large airbag 21 at the bottom of the back structure plate. The first elongated airbag 43 and the second elongated airbag 44 are symmetrical from left to right and are used to wrap the waist.

[0072] Furthermore, the second small airbag 41 is preferably a small multi-layered airbag, more preferably a small three-layered airbag, responsible for massaging the mid-back of the body. The third small airbag 42 is preferably a small multi-layered airbag, more preferably a small three-layered airbag, responsible for massaging and supporting the lower back of the body. The first elongated airbag 43 and the second elongated airbag 44 are preferably elongated double-layered airbags with the same structure, responsible for wrapping and supporting the waist of the body from both sides, and providing auxiliary massage in conjunction with other airbags.

[0073] The first small airbag 22, the second small airbag 41, the third small airbag 42, the first long strip airbag 43, and the second long strip airbag 44 work together to provide multi-layered massage services to the back and waist through the rhythmic inflation and deflation of air.

[0074] The first elongated airbag 43, the second elongated airbag 44, the second small airbag 41, and the third small airbag 42 are positioned in a specific relative manner in front of the large airbag 21. When a person sits in different positions on the seat, such as half-sitting or sitting deeply, the large airbag 21 inflates to provide bottom support, while the second and third small airbags 41 and 42 work together to provide massage to the back. The first elongated airbag 43 and the second elongated airbag 44 are installed inside the front pocket 31, with their rear relative positions on either side of the back structure plate 1. Because the sides of the back structure plate 1 are concave, combined with the special shape of the elongated airbags, they can wrap around the lower back, reducing fatigue from prolonged sitting. When a person sits deeply, the first elongated airbag 43 and the second elongated airbag 44 inflate, providing wrapping and support for the lower back.

[0075] Figure 5 This is a diagram showing the fit between the first airbag layer 2 and the second airbag layer 4 without the first isolation surface 3. (See diagram below.) Figure 5 As shown, if the first isolation surface 3 is not provided between the first airbag layer 2 and the second airbag layer 4, the second airbag layer 4 located on the rear side will push the first airbag layer 2 to flip after it bulges up. Simple deflection is not a disadvantage. During the pushing process, the first airbag layer 2 and the second airbag layer 4 come into direct contact, generating friction noise. More importantly, due to the large friction force, the flipped second airbag layer 4 cannot safely return to its original position, causing the product to fail.

[0076] Example 2

[0077] This embodiment provides a seat backrest based on a layered structure. The difference between this and the layered seat backrest provided in Embodiment 1 is that, in this embodiment, the second airbag layer 4 is connected to the front side of the first isolation surface 3, and an auxiliary airbag layer is connected to the rear side of the first isolation surface 3. The auxiliary airbag layer and the second airbag layer 4 are offset from each other. The auxiliary airbag layer can control the inflation direction of the second airbag layer 4. Specifically, when the auxiliary airbag layer is below the second airbag layer 4, its inflation can control the second airbag layer 4 to deflect upwards; when the auxiliary airbag layer is above the second airbag layer 4, its inflation can control the second airbag layer 4 to deflect downwards; when the auxiliary airbag layer is to the left of the second airbag layer 4, its inflation can control the second airbag layer 4 to deflect to the right; and when the auxiliary airbag layer is to the right of the second airbag layer 4, its inflation can control the second airbag layer 4 to deflect to the left.

[0078] Example 3

[0079] Figure 6 This is a schematic diagram of the structure of the seat back based on the layered structure provided in Embodiment 3 of the present invention. The first airbag layer 2 is in the bulging state. Figure 7 This is a diagram showing the arrangement of the first airbag layer 2, the rigid plate 32, and the second airbag layer 4 of the seat back based on the layered structure provided in Embodiment 3 of the present invention.

[0080] like Figures 6 to 7 As shown, this embodiment provides a seat backrest based on a layered structure, which is an improvement on the seat backrest based on a layered structure in Embodiment 1. The difference between this embodiment and Embodiment 1 is that:

[0081] In this embodiment, the first isolation surface 3 is a rigid plate 32, and the second airbag layer 4 is installed on the front side of the rigid plate 32. The rigid plate 32 is elastically connected to the edge of the back structure plate 1. Figure 6 Not shown in the diagram. The elastic connection method can use materials with elastic deformation properties, such as elastic fabric, elastic wire, springs, and shape memory metal, to connect the back structure plate 1 and the rigid plate 32.

[0082] The rigid plate 32 is elastically connected to the edge of the back structure plate 1, so that when the back structure plate 1 is not parallel to the human body surface 81, the rigid plate 32 can rotate along the surface of the first airbag layer 2 after inflation, causing the second airbag layer 4 on the rigid plate 32 to adaptively rotate to the human body surface 81. Figure 6 The middle arrow indicates the direction of rotation, allowing the second airbag layer 4 to remain in close contact with the body's required surface 81.

[0083] Figure 8This is a schematic diagram of the structure of a layered seat back provided in Embodiment 3 of the present invention, showing the first airbag layer 2 in its uninflated state. Figure 8 As shown, when the first airbag layer 2 is not inflated or deflated, it is in a non-bulging state. The rigid plate 32 located in front of the first airbag layer 2 is attached to the back structure plate 1, and the second airbag layer 4 on the rigid plate 32 provides support to the front side.

[0084] Example 4

[0085] This embodiment provides a seat backrest based on a layered structure, which is an improvement on embodiment 3. The difference between this embodiment and embodiment 2 is as follows:

[0086] In this embodiment, the second airbag layer 4 includes multiple airbags, at least one of which is slidably connected to the rigid plate 32. This slidable connection allows the coordinate position of the airbag relative to the rigid plate 32 to be changed, thereby altering the support position for the user and enabling more functions. Furthermore, the airbag slidably connected to the rigid plate 32 can also serve as an auxiliary airbag, applying a pushing force to the airbag located at the front, thereby controlling the inflation direction of the airbag located at the front.

[0087] Example 5

[0088] Figure 9 This is an exploded view of the layered structure-based seat back provided in Embodiment 5 of the present invention, not showing all airbags. Figure 9 As shown, this embodiment provides a seat backrest based on a layered structure, which has a three-layer airbag structure. It is an improvement based on any one of the embodiments 1 to 4. The difference from the above embodiments is that: in this embodiment, the seat backrest based on the layered structure further includes: a second isolation surface 5, which is disposed on the front side of the second airbag layer 4; and a third airbag layer 6, which is disposed on the front side of the second isolation surface 5 and the rear side of the front end surface 7 of the backrest. The second isolation surface 5 separates the second airbag layer 4 and the third airbag layer 6 to prevent them from directly contacting each other when the airbags are inflated. The third airbag layer 6 is a single-layer airbag that can be inflated and hardened in a short period of time.

[0089] Example 6

[0090] Figure 10 This is a schematic diagram of the front surface 7 of the seat back based on a layered structure provided in Embodiment 6 of the present invention.

[0091] This embodiment provides a seat backrest based on a layered structure, which is an improvement on any one of the embodiments 1 to 5. The difference between this embodiment and the above embodiments is that:

[0092] like Figure 10 As shown, the front surface 7 of the backrest in this embodiment is a composite multi-layer structure, which includes:

[0093] Fabric layer 71, adapted to face the human body surface 81, the fabric layer 71 having breathability and / or waterproofness;

[0094] Support layer 72 is used to control the overall firmness of the front surface 7 of the backrest;

[0095] Temperature control layer 73 is used to control the surface temperature of the front end surface 7 of the backrest.

[0096] The positions of the support layer 72 and the temperature control layer 73 can be interchanged. Preferably, in this embodiment, the support layer 72 is located between the fabric layer 71 and the temperature control layer 73.

[0097] The fabric layer 71 is preferably an ultra-waterproof and breathable fabric. This material, while being waterproof, allows sweat and water vapor to escape smoothly from the contact surface, keeping the contact surface dry. The support layer 72 is preferably made of materials such as sponge or latex with different hardness, and the softness or firmness felt by the user can be controlled by selecting the material. The temperature control layer 73 is preferably a heating wire heating layer or a graphene heating layer, which can control the surface temperature of the product.

[0098] Example 7

[0099] This embodiment provides a seat, including a seat and a layered seat back based on any one of the embodiments 1 to 5. The seat and the layered seat back can be connected using existing methods.

[0100] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A seat back based on a layer structure, characterized in that The back structure plate (1); the first air bag layer (2) is arranged on the front side of the back structure plate (1), and is used for supporting the waist and / or back of the human body when the air bag is inflated; the first isolation surface (3) is arranged on the front side of the first air bag layer (2); the second air bag layer (4) is arranged on the front side of the first isolation surface (3), and the first isolation surface (3) separates the first air bag layer (2) and the second air bag layer (4) to avoid direct contact between the two when the air bag is inflated; the backrest front end surface (7) is arranged on the front side of the second air bag layer (4), and the backrest front end surface (7) has a fabric layer (71) for contacting the human body demand surface (81); the backrest front end surface (7) is attached to the back structure plate (1) to enclose the first air bag layer (2), the first isolation surface (3) and the second air bag layer (4) in the space between them; the first isolation surface (3) is a hard plate (32), the second air bag layer (4) is installed on the front side of the hard plate (32), and the hard plate (32) is elastically connected with the edge of the back structure plate (1); when the back structure plate (1) and the human body demand surface (81) are non-parallel surfaces, the second air bag layer (4) on the hard plate (32) is adaptively rotated to the human body demand surface (81) by rotating the hard plate (32) along the surface of the first air bag layer (2) after inflation. The second air bag layer (4) comprises a plurality of air bags, at least one of the plurality of air bags is in sliding connection with the hard plate (32).

2. The seat back based on a layer structure according to claim 1, characterized in that Further comprising:

3. The seat back based on a layer structure according to claim 1, characterized in that The second isolation surface (5) is arranged on the front side of the second air bag layer (4); the third air bag layer (6) is arranged on the front side of the second isolation surface (5) and the rear side of the backrest front end surface (7), and the second isolation surface (5) separates the second air bag layer (4) and the third air bag layer (6) to avoid direct contact between the two when the air bag is inflated, and the third air bag layer (6) is a single-layer air bag capable of being inflated and hardened for a period of time. The first air bag layer (2) comprises a large air bag (21) arranged at the bottom of the back structure plate (1) for supporting the waist and back, a first small air bag (22) arranged at the middle of the back structure plate (1), and an oblong air bag (23) arranged at the upper part of the back structure plate (1) for supporting the upper back and neck; and / or, the second air bag layer (4) comprises a second small air bag (41) located on the upper side of the middle, a third small air bag (42) located on the lower side of the middle, a first long strip-shaped air bag (43) on the left side and a second long strip-shaped air bag (44) on the right side, the second small air bag (41) and the third small air bag (42) are located on the front side of the large air bag (21) at the bottom of the back structure plate (1), and the first long strip-shaped air bag (43) and the second long strip-shaped air bag (44) are symmetrical and used for wrapping the waist.

4. The seat back based on a layer structure according to any one of claims 1 - 3, characterized in that ​ 5. The seat back based on a layer structure according to any one of claims 1 - 3, characterized in that The backrest front end face (7) is a composite multi-layer structure, which comprises: the fabric layer (71) suitable for facing the human body demand face (81), the fabric layer (71) having air permeability and / or waterproofness; a support layer (72) for controlling the overall softness of the backrest front end face (7); and a temperature control layer (73) for controlling the surface temperature of the backrest front end face (7).

6. The seat back based on a layer structure according to any one of claims 1 - 3, characterized in that Each air bag is capable of being inflated and deflated individually.

7. A seat, characterized by A seat backrest based on a layer structure according to any one of claims 1-6.

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