Multi-layer airbag structure and device having the same

Abstract

The application discloses a multi-layer air bag structure, which comprises a plurality of air bag layers arranged in a layer structure, each air bag layer comprising a base surface and at least one air bag arranged on the base surface, the air bag being capable of being independently inflated and deflated, the base surfaces of the adjacent layers being separated by the air bags, and the base surfaces of the plurality of air bag layers being connected together. The multi-layer air bag structure is similar to a "sandwich" structure, the air bags of the adjacent layers are separated by the base surfaces, direct contact between the air bags of the adjacent layers is avoided, noise generated by mutual friction of the air bag surfaces during inflation and deflation of the air bags is avoided, and the problem of unexpected bulging direction caused by unexpected friction dislocation is avoided. When the air bag at the rear side is inflated and bulges, a supporting force is applied to the adjacent base surface at the front side, so that the base surface at the front side is changed due to the supporting force of the air bag at the rear side, and the change provides support for improving the working distance of the overall structure and realizing various supporting requirements.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of daily necessities, in particular to a multi-layer air bag structure and a device with the same. BACKGROUND

[0002] Air bag structures are widely used in daily life as adjustable supports, for example, they are applied to the backrests of office chairs, by adding air bag structures inside the backrests, the inflation of the air bags is used to support the waist and back of the human body to achieve diversified functions, such as waist supporting function and massage function, etc., for example, they are applied to pillows, by the inflation of the air bags, the head of the human body is supported and pressed.

[0003] The traditional air bag structure is a single-layer air bag structure, which includes a rigid back plate and one or more air bags arranged on the rigid back plate. The types of air bags include large air bags, medium air bags or small air bags. In the single-layer air bag structure, a large air bag or a combination of multiple small air bags or medium air bags and multiple small air bags is usually selected. However, the above selections have some defects. For example, if multiple small air bags or a combination of medium air bags and multiple small air bags are selected, due to the limited inflation height of a single small air bag or medium air bag, the working distance of the entire single-layer air bag structure is small (the effective straight-line distance from the inflation to the non-inflation), which cannot be applied to products with large working distance requirements. If a single large air bag is selected, due to the large inflation height of the large air bag, the use of a single large air bag can effectively increase the overall working distance. However, the effective support range of the inflated large air bag is large, which cannot be applied to products that require local support. In addition, the large air bag occupies a large area and space, which cannot be reasonably arranged with other types of air bags on the rigid back plate, resulting in the defects of single function and poor applicability.

[0004] In order to solve the above problems of the traditional single-layer air bag structure, a welded and stacked multi-layer air bag structure appears in the prior art. By welding other air bags on the rear air bag layer by layer, a stacked multi-layer welded air bag structure is formed. Taking a two-layer welded air bag structure as an example, a front air bag is welded on the front surface of the rear air bag, and the rear air bag and the front air bag are connected through an air hole. The structure has been verified by experiments. Under the condition of the same working distance, the welded and stacked multi-layer air bag structure occupies smaller area and space than the traditional single-layer large air bag structure, and has smaller effective support range, which can adapt to local support scenarios with large working distance. When the specific product defines a clear direction of support demand, the welded and stacked multi-layer air bag structure is used frequently.

[0005] However, the above welded and stacked multi-layer air bag structure has the following defects in actual use:

[0006] 1. Although it has a multi-layered airbag structure, it is essentially a single airbag because the layers are connected by ventilation holes. When in use, all airbag layers need to be inflated, so it cannot perform the characteristics of a single-layer airbag.

[0007] 2. During the inflation and deflation process, the airbags in adjacent layers will generate noise due to friction, resulting in a poor user experience. In some cases, the friction may even cause the front airbag to become misaligned, causing its inflation direction to deviate from the expected direction, and it may not be able to retract properly during deflation, resulting in product failure.

[0008] 3. The welding points of each airbag layer are fixed. When inflated, the multi-layer airbag structure can only inflate in a certain set direction, which lacks flexibility and cannot adapt to the user's multi-directional support needs. Summary of the Invention

[0009] The purpose of this application is to provide a multi-layer airbag structure that can ensure the independence of each airbag layer, effectively utilize the characteristics of each airbag layer, and avoid the problems of noise caused by friction between adjacent airbag layers during inflation and deflation, or even the misalignment of the front airbag caused by friction, resulting in its inflation direction deviating from the expected direction and the inability to retract properly during deflation.

[0010] Another objective of this application is to provide a multi-layer airbag structure that can achieve multi-directional support adjustment according to user needs, with high flexibility and adaptability to users' multi-directional support requirements.

[0011] For this purpose, the following technical solution is adopted in this application:

[0012] In a first aspect, this application provides a multi-layer airbag structure, including multiple airbag layers arranged in a layered structure. Each airbag layer includes a base surface and at least one airbag disposed on the base surface. The airbags are capable of independent inflation and deflation. The base surface separates the airbags of adjacent layers. When the airbag located on the rear side is inflated, it exerts a supporting force on the adjacent front base surface. The base surfaces of the multiple airbag layers are connected together.

[0013] Optionally, two adjacent airbag layers constitute a double-layer airbag structure, the double-layer airbag structure including: a first base surface located on the front side and a first airbag disposed on the first base surface; a second base surface located on the rear side and a second airbag disposed on the second base surface; the first base surface separates the first airbag and the second airbag, and both the first base surface and the second base surface are soft base surfaces, hard base surfaces, or a combination of soft and hard base surfaces.

[0014] Optionally, the first base surface is a soft base surface, and when the second air bag on the second base surface is inflated and bulged, the second air bag exerts the support force on the first base surface to deform the first base surface.

[0015] Optionally, the second base surface is a hard base surface, and when the second air bag on the second base surface is not inflated and bulged, the first air bag on the first base surface is inflated and bulged to use the second base surface to provide the support force along the normal direction of the support part of the second base surface; and when the second air bag on the second base surface is inflated and bulged, the first air bag on the first base surface is inflated and bulged to use the second air bag to provide the support force along the normal direction of the support part of the second air bag.

[0016] Optionally, the second base surface is a soft base surface, and the back surface of the second base surface is adapted to be attached to a hard substrate of a product; when the second air bag on the second base surface is not inflated and bulged, the first base surface is attached to the second base surface and the hard substrate, and the first air bag on the first base surface is inflated and bulged to use the hard substrate to provide the support force along the normal direction of the support part of the hard substrate; and when the second air bag on the second base surface is inflated and bulged, the first air bag on the first base surface is inflated and bulged to use the second air bag to provide the support force along the normal direction of the support part of the second air bag.

[0017] Optionally, the first base surface is a hard base surface, and the corresponding edges of the first base surface and the second base surface are elastically connected, and when the second air bag on the second base surface is inflated and bulged, the second air bag exerts the support force on the first base surface to move the first base surface to the front side, and at least one of the back surface of the first base surface and the outer surface of the second air bag in the inflated and bulged state is an arc structure.

[0018] Optionally, the second base surface is a hard base surface, and when the second air bag on the second base surface is not inflated and bulged, the first air bag on the first base surface is inflated and bulged to use the first base surface to provide the support force along the normal direction of the support part of the first base surface; and when the second air bag on the second base surface is inflated and bulged, the first base surface and the first air bag thereon are capable of rotating along the outer surface of the second air bag.

[0019] Optionally, the second base surface is a soft base surface, the back surface of the second base surface is adapted to be attached to a hard base plate of a product, the edge of the first base surface is elastically connected to the corresponding edge of the second base surface or the corresponding part of the hard base plate; when the second air bag on the second base surface is not inflated, the first air bag on the first base surface provides support force by the first base surface when inflated, and is inflated along the normal direction of the support part of the first base surface; when the second air bag on the second base surface is inflated, the first base surface and the first air bag can rotate along the outer surface of the second air bag.

[0020] Optionally, the elastic connection is one or any combination of elastic threads, elastic net or elastic band.

[0021] Optionally, at least one of the plurality of air bag layers comprises: the base surface is a hard back plate; a gear adjustment structure, one end of the gear adjustment structure is fixed on the hard back plate, the gear adjustment structure comprises a position adjustment structure and an angle adjustment structure; the air bag is connected to the other end of the gear adjustment structure, the air bag can move in position relative to the hard back plate under the adjustment of the position adjustment structure, and can adjust the angle relative to the hard back plate under the adjustment of the angle adjustment structure.

[0022] Optionally, the position adjustment structure comprises a gear rack fixedly arranged on the hard back plate and a cylindrical gear movably arranged, the cylindrical gear is engaged with the gear rack; the angle adjustment structure comprises a first bevel gear fixedly arranged opposite to the cylindrical gear and located inside the cylindrical gear, and a second bevel gear engaged with the first bevel gear at one end and fixedly connected with the air bag at the other end, the intersection angle between the central axis of the second bevel gear and the central axis of the first bevel gear is greater than 0 degrees and less than 90 degrees.

[0023] Optionally, the air bag is fixed on the base surface by welding, sewing or a combination of welding and sewing, and the connection part of the air bag and the base surface is located at the middle part or the edge part of the air bag.

[0024] Optionally, when the base surface is a hard base surface, the plurality of base surfaces are one or any combination of plastic plates, wooden plates and metal plates; when the base surface is a soft base surface, the plurality of base surfaces are one or any combination of cloth pieces, mesh pieces, sponge pieces and non-Newtonian fluids.

[0025] Optionally, the air bag is a single-layer air bag or a composite multi-layer air bag.

[0026] Optionally, the base surface is a single-layer base surface or a composite multi-layer base surface.

[0027] In a second aspect, the present application provides a device having the multi-layer air bag structure provided in the first aspect, and the device is a seat, a sofa, a cushion, a pillow, a mattress, or a wearable product.

[0028] Advantages of the present application:

[0029] 1. The multi-layer air bag structure provided by the present application comprises a plurality of air bag layers arranged in a layer structure, each air bag layer comprises a base surface and at least one air bag arranged on the base surface, the air bag can be independently inflated and deflated, the base surface separates the air bags of adjacent layers, the air bag on the rear side exerts a supporting force on the base surface on the front side when inflated, and the base surfaces of the plurality of air bag layers are connected together.

[0030] The multi-layer air bag structure provided by the present application is similar to a "sandwich" structure, the air bags of adjacent layers are separated by the base surface, compared with the traditional single-layer air bag structure, the multi-layer air bag structure of the present application can be stacked with different number of air bag layers according to the needs, so that the effective supporting range and working distance of the multi-layer air bag structure as a whole can meet the needs of various scenes. At the same time, the air bags of adjacent layers are separated by the base surface, which avoids direct contact between the air bags of adjacent layers, thereby avoiding the noise generated by the mutual friction of the air bag surfaces during the inflation and deflation of the air bags, and avoiding the problem of unexpected inflation direction caused by unexpected friction misalignment, and also avoiding the problem of air bag deflation and non-recovery caused by friction misalignment. In addition, in the present application, the air bag on the rear side exerts a supporting force on the base surface on the front side when inflated, the supporting force acting on the base surface on the front side will cause the displacement or shape change of the base surface in the front-rear direction, which provides support for the adjustment of the working distance and the diversified supporting function of the multi-layer air bag structure as a whole. The multi-layer air bag structure provided by the present application further enables each layer of air bag to be independently inflated and deflated, which makes the user can set and adjust the inflation amount of each layer of air bag according to the needs, and in combination with the independent characteristics of each layer of air bag after being separated by the base surface, better support is provided for realizing the diversified supporting function of the multi-layer air bag structure.

[0031] 2. The multi-layer air bag structure provided by the present application further comprises a soft base surface, when the second air bag on the second base surface is inflated and inflated, the second air bag exerts the supporting force on the first base surface to deform the first base surface.

[0032] By setting the first base surface on the front side as a soft base surface, when the second air bag on the second base surface on the back side is inflated and swells, the support force exerted by the second air bag on the first base surface can cause the first base surface to deform, and this deformation can change the swelling direction of the first air bag on the first base surface, thereby adapting to the support needs of the user in different directions.

[0033] 3、The multi-layer air bag structure provided by the present application further sets the second base surface as a hard base surface; when the second air bag on the second base surface is not swelled, the first base surface is attached to the second base surface, and when the first air bag on the first base surface is inflated and swelled, the support force provided by the second base surface is used to swell along the normal direction of the support part of the second base surface; when the second air bag on the second base surface is inflated and swelled, the support force provided by the second air bag is used by the first air bag on the first base surface to swell along the normal direction of the support part of the second air bag.

[0034] By setting the second base surface as a hard base surface on the basis of setting the first base surface as a soft base surface, when the second air bag is not swelled, the shape of the soft first base surface can adapt to the shape of the hard second base surface and be attached to the second base surface, and when the first air bag on the soft first base surface is inflated and swelled, the support force provided by the hard second base surface is used to swell along the normal direction of the support part of the second base surface; when the second air bag is inflated and swelled, the swelled second air bag has a certain hardness, the first air bag uses the support force provided by the second air bag to swell along the normal direction of the support part of the second air bag, and at the same time, the working distance of the first air bag is increased due to the swelling of the second air bag.

[0035] According to the above settings, the user can selectively set the shape of the second base surface, the types of the first air bag and the second air bag, and the positions of the first air bag and the second air bag on the first base surface and the second base surface according to needs, thereby realizing support in multiple directions.

[0036] 4、The multi-layer air bag structure provided by the present application sets the second base surface as a soft base surface, so that the multi-layer air bag structure can be adapted to a product with a hard base plate, and in use, the second base surface is attached to the hard base plate of the product. Since the second base surface is a soft base surface, the shape of the second base surface can adapt to the shape of the hard base plate and change, thereby improving the adaptability of the multi-layer air bag structure.

[0037] 5. The multi-layer air bag structure provided by the present application, wherein the first base surface is a rigid base surface, and the corresponding edges of the first base surface and the second base surface are elastically connected; when the second air bag on the second base surface is inflated and bulges, the second air bag exerts a supporting force on the first base surface to move the first base surface to the front side, and at least one of the back surface of the first base surface and the outer surface of the bulging second air bag in contact with the back surface is an arc-shaped structure.

[0038] By setting the first base surface as a rigid base surface and elastically connecting the corresponding edges of the first base surface and the second base surface, when the second air bag on the second base surface is inflated and bulges, the second air bag exerts a supporting force on the first base surface to move the first base surface to the front side, thereby increasing the working distance of the first air bag on the first base surface. In addition, by setting at least one of the back surface of the first base surface and the outer surface of the second air bag in contact with the back surface as an arc-shaped structure, the first base surface and the first air bag thereon can rotate along the outer surface of the inflated second air bag under the action of the elastic connection of the corresponding edges of the first base surface and the second base surface, which can adapt to the rotation of the user, so that the first base surface can change to adapt to the angle change of the user's demand surface and remain parallel to the user's demand surface.

[0039] 6. The multi-layer air bag structure provided by the present application, comprising an air bag layer as an adjusting member, wherein the air bag layer comprises: the base surface, which is a rigid back plate; a gear adjusting structure, one end of the gear adjusting structure being fixed on the rigid back plate, the gear adjusting structure comprising a position adjusting structure and an angle adjusting structure; and the air bag, which is connected to the other end of the gear adjusting structure, the air bag being capable of moving in position relative to the rigid back plate under the adjustment of the position adjusting structure and being capable of adjusting in angle relative to the rigid back plate under the adjustment of the angle adjusting structure.

[0040] The air bag layer can adjust the inflation direction and working distance of the air bag on the air bag layer located at the back side thereof, thereby realizing more abundant supporting functions. The air bag layer can also serve as the air bag layer closest to the front side of the user, and exert supporting forces in different positions and directions on the user through the position and angle changes of the air bag.

[0041] 7. The multi-layer air bag structure provided by the present application, wherein the position adjusting structure comprises a rack fixedly arranged on the rigid back plate and a cylindrical gear movably arranged, the cylindrical gear being in meshing cooperation with the rack; the angle adjusting structure comprises a first bevel gear fixedly arranged opposite to the cylindrical gear and located inside the cylindrical gear, and a second bevel gear having one end in meshing cooperation with the first bevel gear and the other end fixedly connected with the air bag, the intersection angle between the central axis of the second bevel gear and the central axis of the first bevel gear being greater than 0 degrees and less than 90 degrees.

[0042] The position adjusting structure is set as the matching structure of rack and pinion, so that the position of the air bag can be adjusted along the whole rack, the adjustable range is large, the angle adjusting structure is set as the matching structure of bevel gears, and the intersection angle of the central axes of the two bevel gears is greater than 0 degrees and less than 90 degrees, so that the air bag can be kept in an inclined state on the rigid backboard, and the angle change of 360 degrees can be realized.

[0043] 8、The multi-layer air bag structure provided by the application is a composite multi-layer base surface.

[0044] By setting the base surface of one or several air bag layers in the multi-layer air bag structure as a composite multi-layer base surface, the one or several air bag layers can have more functional layers, such as heating layers and dehumidification layers, in addition to the support requirement, and the composite multi-layer base surface provides the possibility for the realization of more functions. BRIEF DESCRIPTION OF DRAWINGS

[0045] Figure 1 FIG. 1 is a perspective structural schematic view of a double-layer air bag structure of a multi-layer air bag structure provided by Embodiment One of the application;

[0046] Figure 2 FIG. 2 is a perspective structural schematic view of a double-layer air bag structure of a multi-layer air bag structure provided by Embodiment One of the application;

[0047] Figure 3 FIG. 3 is a perspective structural schematic view of a double-layer air bag structure of a multi-layer air bag structure provided by Embodiment Two of the application;

[0048] Figure 4 FIG. 4 is a perspective structural schematic view of a double-layer air bag structure of a multi-layer air bag structure provided by Embodiment Two of the application;

[0049] Figure 5 FIG. 5 is a perspective structural schematic view of a double-layer air bag structure of a multi-layer air bag structure provided by Embodiment Three of the application;

[0050] Figure 6 FIG. 6 is a perspective structural schematic view of a double-layer air bag structure of a multi-layer air bag structure provided by Embodiment Three of the application;

[0051] Figure 7 FIG. 7 is a perspective structural schematic view of a double-layer air bag structure of a multi-layer air bag structure provided by Embodiment Four of the application;

[0052] Figure 8 FIG. 8 is a perspective structural schematic view of a double-layer air bag structure of a multi-layer air bag structure provided by Embodiment Four of the application; Figure 7 FIG. 9 is a perspective structural schematic view of a double-layer air bag structure of a multi-layer air bag structure provided by Embodiment Five of the application;

[0053] Figure 9 FIG. 10 is a perspective structural schematic view of a double-layer air bag structure of a multi-layer air bag structure provided by Embodiment Five of the application;

[0054] Figure 10 Fig. 1 is a perspective view of a multi-layer airbag structure according to an embodiment of the present application. Figure 9 Fig. 2 is a perspective view of another airbag layer of the multi-layer airbag structure according to the embodiment of the present application.

[0055] Figure 11 Fig. 3 is a perspective view of an airbag layer of the multi-layer airbag structure according to the embodiment of the present application.

[0056] Figure 12 Fig. 4 is a perspective view of another airbag layer of the multi-layer airbag structure according to the embodiment of the present application.

[0057] Figure 13 Fig. 5 is a perspective view of a connection position of an airbag and a base surface of the multi-layer airbag structure according to the embodiment of the present application.

[0058] Figure 14 Fig. 6 is a perspective view of a connection position of an airbag and a base surface of the multi-layer airbag structure according to the embodiment of the present application.

[0059] Figure 15 Fig. 7 is a perspective view of an airbag layer as an adjusting member of the multi-layer airbag structure according to the embodiment of the present application.

[0060] Figure 16 Fig. 8 is a perspective view of another airbag layer of the multi-layer airbag structure according to the embodiment of the present application. Figure 15 Fig. 9 is a perspective view of another airbag layer of the multi-layer airbag structure according to the embodiment of the present application.

[0061] Figure 17 Fig. 10 is a comparison view of a large airbag and a composite multi-layer airbag.

[0062] BRIEF DESCRIPTION OF DRAWINGS

[0063] 1 - airbag, 11 - first airbag, 12 - second airbag

[0064] 2 - base surface, 21 - first base surface, 22 - second base surface, 23 - hard back plate

[0065] 3 - hard base plate

[0066] 4 - elastic wire

[0067] 51 - rack, 52 - cylindrical gear, 53 - first bevel gear, 54 - second bevel gear DETAILED DESCRIPTION

[0068] In order to make the technical problems solved by the present application, the technical solutions adopted and the technical effects reached more clear, the technical solutions of the embodiments of the present application will be further described in detail below with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present application, but not all the embodiments of the present application. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0069] In the description of the present application, unless explicitly defined and limited, the terms "connected", "connected", "fixed" should be understood broadly, for example, it can be fixedly connected, or detachably connected, or integrated; it can be mechanically connected; it can be directly connected, or indirectly connected through an intermediate medium; it can be 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.

[0070] In the present application, unless explicitly defined and limited, the first feature "on" or "under" the second feature can include that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the first feature "on", "above" and "above" the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "under", "below" and "below" the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0071] The technical solutions of the present application will be further described below with the accompanying drawings and through specific embodiments.

[0072] In the first aspect, the present application provides a multi-layer air bag structure, comprising a plurality of air bag layers arranged in a layer structure, each of the air bag layers comprising a base surface 2 and at least one air bag 1 arranged on the base surface 2, the air bag 1 being capable of being inflated and deflated, the base surface 2 separating the air bags 1 of adjacent layers, the air bag 1 located at the rear side applying a supporting force to the base surface 2 of the adjacent front side when inflated and swollen, and the base surfaces 2 of the plurality of air bag layers being connected together.

[0073] The multi-layer air bag 1 structure provided by the application is similar to a "sandwich" structure, adjacent air bag layers are separated by a base surface 2, compared with a traditional single-layer air bag 1 structure, the multi-layer air bag 1 structure of the application can be stacked with different numbers of air bag layers according to requirements, so that the support range and working distance of the air bag 1 can meet the requirements of various scenes. At the same time, the air bags 1 of adjacent layers are separated by the base surface 2, which avoids direct contact between the air bags 1 of adjacent layers, thereby avoiding the noise generated by the mutual friction of the surfaces of the air bags 1 during the inflation and deflation process of the air bags 1, and avoiding the problem of unexpected bulging direction caused by unexpected friction misalignment. In the application, the air bag 1 located at the rear side exerts a supporting force on the adjacent front side base surface 2 when inflated and bulged, so that the front side base surface 2 changes due to the supporting force of the rear side air bag 1. This change provides support for improving the working distance of the overall structure and achieving various support requirements.

[0074] The number of air bag layers is at least two, and can also be multiple, for example, three, four, five, six, etc. The specific number of layers is designed according to product and user requirements.

[0075] The base surfaces 2 of the plurality of air bag layers are connected together. The plurality of base surfaces 2 have various connection forms, in the embodiment of the application, the corresponding edges of the plurality of base surfaces are connected together. In other embodiments, when the sizes of the plurality of base surfaces are different, they can be connected together in the form of multi-surface mutual connection.

[0076] The base surface can be divided into a hard base surface and a soft base surface according to hardness, in the application, the hardness of the hard base surface is greater than that of the soft base surface, and the hard base surface does not deform in shape under the supporting force of the rear side air bag, while the soft base surface is more prone to deformation under the supporting force of the air bag.

[0077] In the present application, when the base surface is a hard base surface, the plurality of base surfaces can be one or any combination of plastic plates, wooden plates, metal plates. Such materials are relatively hard and can provide a fulcrum for the air bag, which can be inflated along the normal direction of the support part of the hard base surface when the air bag is inflated. The combination of these materials is arbitrary, for example, for a multi-layer air bag structure with three layers of hard base surfaces, the front layer of hard base surface is a metal plate, the middle layer of hard base surface is a wooden plate, and the back layer of hard base surface is a plastic plate, or all three layers of hard base surface are plastic plates. For a hard base surface of a certain air bag layer, it can also be a single plastic plate material, or a combination of plastic plates and wooden plates or metal plates, such as a plastic plate on the left half of the hard base surface and a metal plate on the right half. Those skilled in the art will understand that the above combinations are diverse, and the specific material selection is designed according to the product and user's needs. Any combination of multi-layer air bag structure should fall within the scope of protection of the present application.

[0078] In the present application, when the base surface is a soft base surface, the plurality of base surfaces can be one or any combination of cloth, mesh, and sponge. These materials are relatively soft and can provide mounting and fixing points for the air bag while having flexible extensibility, allowing the air bag to fully exert its own characteristics without being constrained. Soft base surfaces can also be made of non-Newtonian fluid. This material is used in specific scenarios and can support and limit the direction of air bag inflation when the air bag is inflated quickly, but it can also ensure that the air bag extends freely when the air bag is inflated quickly.

[0079] Further, in the present application, each layer of air bag 1 can be independently inflated and deflated. This arrangement allows users to set and adjust the inflation amount of each layer of air bag according to their needs, and in combination with the independent characteristics of each layer of air bag mentioned in point 1, it better supports the diversified support function of the multi-layer air bag structure.

[0080] Air bags can exhibit different characteristics depending on the degree of inflation, for example, when the air bag is not fully inflated, it is relatively soft to the touch. When the air bag is fully inflated, it will give a relatively hard feeling.

[0081] It should be noted that when each air bag layer contains a plurality of air bags 1, the present application does not limit each layer of the single air bag 1 to be inflated and deflated independently, of course, from the perspective of achieving more functions, each layer of the single air bag 1 is provided to be independently inflated and deflated, that is, each single air bag 1 is connected with the inflation and deflation pipeline, but such a setting will make the overall structure more complex. Preferably, in the present application, the air bags 1 with the same characteristics in the same air bag layer, for example, are all small air bags 1, can share a set of inflation and deflation pipeline. The specific inflation and deflation pipeline setting can be set according to the actual needs.

[0082] In the present application, the corresponding edges of the base surfaces 2 of the plurality of air bag layers can be directly connected or indirectly connected or not connected. As a preferred embodiment of the present application, the corresponding edges of the base surfaces 2 of the plurality of air bag layers are connected together. Connecting the corresponding edges of the base surfaces 2 of the plurality of air bag layers together can make the overall structure of the multi-layer air bag 1 structure more stable on the one hand, and on the other hand, through the edge connection, the air bag 1 located on the base surface 2 can be prevented from running out from the side of the base surface 2.

[0083] The core protection idea of the present application is to protect a multi-layer air bag 1 structure similar to a "sandwich" based on a layer structure, and the characteristics of each layer of the air bag layer can change the different characteristics of the overall structure. Taking a double-layer air bag structure composed of two adjacent air bag layers in the multi-layer air bag 1 structure as an example, the double-layer air bag structure comprises: a first base surface 21 located on the front side and a first air bag 11 arranged on the first base surface 21; a second base surface 22 located on the rear side and a second air bag 12 arranged on the second base surface 22; the first base surface 21 separates the first air bag 11 and the second air bag 12, and the first base surface 21 and the second base surface 22 are both soft base surfaces or hard base surfaces or soft and hard combined base surfaces 2.

[0084] The characteristics of the multi-layer air bag 1 structure of the present application will be described below with reference to the double-layer air bag structure composed of two adjacent air bag layers as an example.

[0085] Embodiment one

[0086] Figure 1 A perspective structural schematic view of a double-layer air bag structure (the second air bag 12 is not inflated) of the multi-layer air bag structure provided for embodiment one of the present application; Figure 2 A perspective structural schematic view of a double-layer air bag structure (the second air bag 12 is inflated) of the multi-layer air bag structure provided for embodiment one of the present application.

[0087] As Figure 1 and Figure 2As shown, the embodiment provides a double-layer air bag structure, the first base surface 21 is a soft base surface, when the second air bag 12 on the second base surface 22 is inflated and bulges, the second air bag 12 exerts the supporting force on the first base surface 21 to deform the first base surface 21.

[0088] In the embodiment, by setting the first base surface 21 on the front side as a soft base surface, when the second air bag 12 on the second base surface 22 on the rear side is inflated and bulges, the supporting force exerted by the second air bag 12 on the first base surface 21 can deform the first base surface 21, and the deformation can change the bulging direction of the first air bag 11 thereon, thereby adapting to the supporting needs of the user in different directions.

[0089] Further, in the embodiment, the second base surface 22 is a hard base surface; when the second air bag 12 on the second base surface 22 is not inflated and bulged, the first base surface 21 is attached to the second base surface 22, and when the first air bag 11 on the first base surface 21 is inflated and bulged, the second base surface 22 provides the supporting force in the normal direction of the supporting part of the second base surface 22; when the second air bag 12 on the second base surface 22 is inflated and bulged, the first air bag 11 on the first base surface 21 is inflated and bulged by the second air bag 12, and the supporting force is provided in the normal direction of the supporting part of the second air bag 12.

[0090] By setting the second base surface 22 as a hard base surface on the basis of the first base surface 21 being a soft base surface, when the second air bag 12 is not inflated and bulged, the shape of the first base surface 21 adapts to the shape of the second base surface 22, and the two are in an attached state, and when the first air bag 11 on the first base surface 21 is inflated and bulged, the hard second base surface 22 provides the supporting force in the normal direction of the supporting part of the second base surface 22; when the second air bag 12 is inflated and bulged, the inflated second air bag 12 has a certain hardness, and the first air bag 11 provides the supporting force in the normal direction of the supporting part of the second air bag 12, and at the same time, due to the bulging of the second air bag 12, the working distance of the first air bag 11 is increased.

[0091] According to the above settings, the user can select the shape of the second base surface 22, the types of the first air bag 11 and the second air bag 12, and the positions of the first air bag 11 and the second air bag 12 on the first base surface 21 and the second base surface 22 according to the needs, thereby realizing supporting in multiple directions.

[0092] In the embodiment, as shown in FIG. 1, the first air bag 11 and the second air bag 12 are arranged on the first base surface 21 and the second base surface 22, respectively. Figure 1 and Figure 2As shown, the second base surface is a plastic plate, which is designed as a concave shape, and the left and right sides are designed as arc shapes wrapping inward. The second air bag is a large air bag embedded in the concave shape. The first base surface is a cloth sheet, and the left and right side edges of the cloth sheet are connected to the left and right side edges of the plastic plate. The cloth sheet is provided with a small air bag on each of the left and right sides. When the large air bag is not inflated, the cloth sheet can be attached to the plastic plate. At this time, the small air bag is inflated, and the small air bag can be inflated along the normal direction of the arc-shaped plate on the left and right sides of the plastic plate. When the body part of the human body is located therein, the first air bag on the left and right sides can form a wrapping support effect on the body part, such as the waist of the human body. The first air bag on the left and right sides forms a wrapping on the waist, so that the user has a good feeling.

[0093] When the large air bag is inflated, the large air bag pushes the cloth sheet forward when it is inflated. When the large air bag is inflated, the cloth sheet is basically in a planar state under the support of the inflated large air bag. At this time, the small air bag on the left and right sides can basically be inflated along the vertical direction of the front and back under the support of the large air bag.

[0094] Embodiment Two

[0095] Figure 3 A perspective structural schematic diagram of a double-layer air bag structure (the second air bag 12 is not inflated) of a multi-layer air bag structure provided in Embodiment Two of the present application; Figure 4 A perspective structural schematic diagram of a double-layer air bag structure (the second air bag 12 is inflated) of a multi-layer air bag structure provided in Embodiment Two of the present application.

[0096] The difference between this embodiment and Embodiment One is that the second base surface 22 is a soft base surface, and the back of the second base surface 22 is suitable for being attached to a hard substrate 3 of a product. In this embodiment, as shown in Figure 3 and Figure 4 the product with the hard substrate 3 is the backrest of a sofa.

[0097] When the second air bag 12 on the second base surface 22 is not inflated, the shape of the first base surface 21 is adapted to the shape of the hard substrate 3, as shown in Figure 3 and Figure 4 the hard substrate 3 is in a wave shape, and the first base surface 21 is attached to the hard substrate 3 and also presents a wave shape. When the first air bag 11 of the first base surface 21 is inflated, the first air bag 11 is inflated along the normal direction of the support part of the hard substrate 3 by using the support force provided by the hard substrate 3. When the second air bag 12 on the second base surface 22 is inflated, the first air bag 11 on the first base surface 21 is inflated along the normal direction of the support part of the second air bag 12 by using the support force provided by the second air bag 12.

[0098] By making the second base surface 22 a flexible base surface, the multilayer airbag 1 structure of this application can be adapted to a product with a rigid substrate 3. In use, the second base surface 22 is attached to the rigid substrate 3 of the product. Since the second base surface 22 is a flexible base surface, the shape of the second base surface 22 can be adapted to the shape of the rigid substrate 3.

[0099] like Figure 3 and Figure 4 As shown, both the first and second base surfaces are made of fabric. The second airbag consists of multiple small airbags arranged on the second base surface, and the first airbag consists of at least one medium-sized airbag arranged on the first base surface. When the small airbags are not inflated, the medium-sized airbag inflates along the normal direction of the supporting portion of the rigid substrate 3. Figure 3 Looking up, the medium-sized airbag inflates along the front, providing support in that direction; when the small airbag inflates, as... Figure 4 As shown, the inflated small airbag and the medium-sized airbag on the front are misaligned in the front-rear direction. The inflating of the small airbag causes deformation of the first base surface on the front side. The medium-sized airbag, supported by the inflated small airbag, inflates along the normal direction of the supporting part of the small airbag. From the figure, the inflating direction is diagonally forward. It can be seen that when the inflating direction of the rear airbag is misaligned with that of the front airbag, this misalignment can be used to make the front airbag inflate diagonally.

[0100] Example 3

[0101] Figure 5 This is a three-dimensional structural diagram of a double-layer airbag structure (the second airbag 12 is not inflated) provided in Embodiment 3 of this application. Figure 6 This is a three-dimensional structural diagram of a double-layer airbag structure (the second airbag 12 is inflated) provided in Embodiment 3 of this application.

[0102] like Figure 5 and Figure 6 As shown, this embodiment provides a double-layer airbag structure, which differs from the double-layer airbag structure of Embodiment 1 in that: the first base surface 21 is a rigid base surface, the corresponding edges of the first base surface 21 and the second base surface 22 are elastically connected, when the second airbag 12 on the second base surface 22 is inflated, the second airbag 12 applies the supporting force to the first base surface 21, causing the first base surface 21 to move forward, and at least one of the back surface of the first base surface 21 and the outer surface of the inflated second airbag 12 in contact with it is an arc-shaped structure.

[0103] By setting the first base surface 21 as a rigid base surface and elastically connecting the corresponding edges of the first base surface 21 and the second base surface 22, when the second air bag 12 on the second base surface 22 is inflated, the second air bag 12 will exert a supporting force on the first base surface 21 to move the first base surface 21 to the front side, thereby increasing the working distance of the first air bag 11 on the first base surface 21. In addition, by setting at least one of the back surface of the first base surface 21 and the outer surface of the second air bag 12 in contact with the back surface as an arc-shaped structure, the first base surface 21 and the first air bag 11 thereon can rotate along the outer surface of the inflated second air bag 12 under the action of the elastic connection of the corresponding edges of the first base surface 21 and the second base surface 22, which can adapt to the rotation of the user, so that the first base surface 21 can change to adapt to the angle change of the user's demand surface and remain parallel to the user's demand surface.

[0104] Further, the second base surface 22 is a rigid base surface; when the second air bag 12 on the second base surface 22 is not inflated, the first air bag 11 on the first base surface 21 is inflated and provides a supporting force using the first base surface 21 to inflate along the normal direction of the supporting part of the first base surface 21; when the second air bag 12 on the second base surface 22 is inflated, the first base surface 21 and the first air bag 11 thereon can rotate along the outer surface of the second air bag 12.

[0105] As shown in Figure 5 and Figure 6 In the present embodiment, the first base surface and the second base surface are both made of metal plates, and the cylindrical figure in the figure represents a structural diagram of a human body. The second air bag is a large air bag arranged at the middle position of the first base surface, and the first air bag is two medium-sized air bags arranged on the left and right sides of the first base surface. The left and right side edges of the two metal plates are connected by an elastic net woven into an elastic net, and the connection of the elastic net makes the two metal plates both constrained and capable of relative displacement due to external force. Both metal plates have a certain inward concave arc shape. When the large air bag is not inflated, the two metal plates are basically attached together. When a human body leans on the air bag structure of the present embodiment, it is supported by the two metal plates, and the two medium-sized air bags on the metal plate as the first base surface on the front side support the side of the human body. When the large air bag is semi-inflated, as shown in Figure 5As shown, the human body is supported by the hard metal plate as the first base surface, and at the same time, the human body can also feel the soft support due to the softness of the semi-inflated large air bag. The combination of the two can provide a better experience to the human body. When the large air bag is fully inflated, the large air bag is relatively hard, and the metal plate as the first base surface has a certain curvature. The two metal plates are connected by the elastic net, and the metal plate as the first base surface can adaptively change with the change of the support demand surface of the human body, so as to keep the support surface of the first base surface parallel to the support demand surface of the human body. For example, when the human body twists, the metal plate as the first base surface rotates along the outer surface of the large air bag to adapt to the twisting of the human body.

[0106] Embodiment Four

[0107] Figure 7 A perspective structural schematic diagram of a double-layer air bag structure (the second air bag 12 is inflated) of the multi-layer air bag structure provided in Embodiment Four of the present application; Figure 8 As Figure 7 A perspective structural schematic diagram from another angle.

[0108] As Figure 7 and Figure 8 As shown, the present embodiment provides a double-layer air bag structure, which is different from the double-layer air bag structure of Embodiment Three in that: the second base surface 22 is a soft base surface, the back surface of the second base surface 22 is adapted to be attached to the hard substrate 3 of a product, and the edge of the first base surface 21 is elastically connected with the corresponding edge of the second base surface 22 or the corresponding part of the hard substrate 3; when the second air bag 12 on the second base surface 22 is not inflated, the first air bag 11 on the first base surface 21 provides support force when inflated, and is inflated along the normal direction of the support part of the first base surface 21; when the second air bag 12 on the second base surface 22 is inflated, the first base surface 21 and the first air bag 11 thereof can rotate along the outer surface of the second air bag 12.

[0109] As Figure 7 and Figure 8 As shown, the second air bag is a plurality of small air bags arranged on the first base surface. When the small air bags in the middle column are inflated, the small air bags in the middle column push the front side of the first base surface to move forward. When the human body twists, the first base surface rotates around the small air bags in the middle column as the support point and fulcrum, so as to adapt to the support demand surface of the human body and keep parallel to the support demand surface of the human body.

[0110] Embodiment Five

[0111] Figure 9A perspective view of a double-layer air bag structure of the multi-layer air bag structure provided in Embodiment Five is shown in the figure; Figure 10 For Figure 9 A perspective view from another angle is shown in the figure.

[0112] As Figure 9 and Figure 10 shown, the embodiment provides a double-layer air bag structure, which is different from the double-layer air bag structure of Embodiment Four in that the double-layer air bag structure of the embodiment is attached to a long strip-shaped hard backboard of a sofa, and the hard backboard is in a wave shape. The second air bag is a plurality of small air bags arranged on a second base surface, and the plurality of small air bags are divided into three columns, i.e., left, middle and right columns. When the plurality of small air bags are inflated, the inflated height is substantially uniform. The first base surface is in an arc shape, and when the human body is twisted, the first base surface is self-adaptively rotated along the support surface of the plurality of inflated small air bags according to the twisting angle of the human body, so as to keep the first base surface parallel to the support demand surface of the human body.

[0113] Figure 11 A structure diagram of an air bag layer of the multi-layer air bag structure provided in the embodiment is shown in the figure. Figure 12 A structure diagram of another air bag layer of the multi-layer air bag structure provided in the embodiment is shown in the figure.

[0114] As Figure 11 shown, the base surface of the air bag layer is a hard base surface, and is designed in a concave shape. The two sides of the hard base surface are in an inwardly concave arc shape. The air bag 1 is arranged at the arc shape, so that the air bag 1 can be inflated along the normal direction of the arc shape when inflated. The user can design the shape of the hard base surface according to the requirement, so as to set the inflation direction of the air bag.

[0115] As Figure 12 shown, the base surface of the air bag layer is a soft base surface. The air bag arranged on the soft base surface can change the inflation direction due to the deformation of the soft base surface. The user can design the stress deformation position of the soft base surface according to the requirement, so as to make the air bag inflate in the set direction.

[0116] Figure 15 A perspective view of an air bag layer as an adjusting member of the multi-layer air bag structure provided in the embodiment is shown in the figure. Figure 16 A perspective view from another angle is shown in the figure. Figure 15

[0117] As Figure 15 and Figure 16 ​As shown in this application, at least one of the multiple airbag layers includes: the base surface 2, which is a rigid back plate 23; a gear adjustment structure, one end of which is fixed to the rigid back plate 23, the gear adjustment structure including a position adjustment structure and an angle adjustment structure; and an airbag 1, connected to the other end of the gear adjustment structure, the airbag 1 being able to move relative to the rigid back plate 23 under the adjustment of the position adjustment structure, and being able to adjust its angle relative to the rigid back plate 23 under the adjustment of the angle adjustment structure.

[0118] This airbag layer allows adjustment of the inflation direction and working distance of the airbag 1 located on its rear side, thereby achieving a wider range of support functions. This airbag layer can also serve as the foremost airbag layer closest to the user, applying support forces to the user in different positions and directions by changing the position and angle of the airbag 1.

[0119] Furthermore, the position adjustment structure includes a rack 51 fixedly mounted on the rigid back plate 23 and a movable cylindrical gear 52, the cylindrical gear 52 meshing with the rack 51; the angle adjustment structure includes a first bevel gear 53 fixedly mounted relative to and inside the cylindrical gear 52, and a second bevel gear 54 having one end meshing with the first bevel gear 53 and the other end fixedly connected to the airbag 1, the angle between the central axis of the second bevel gear 54 and the central axis of the first bevel gear 53 being greater than 0 degrees and less than 90 degrees.

[0120] The position adjustment structure is set as a mating structure of rack 51 and cylindrical gear 52, so that the position of airbag 1 can be adjusted along the entire rack 51, with a large adjustable range. The angle adjustment structure is set as a mating structure of bevel gears, and the angle between the central axes of the two bevel gears is greater than 0 degrees and less than 90 degrees, so that airbag 1 can be held in an inclined state on rigid back plate 23, and can achieve 360-degree angle change.

[0121] Figure 13 A schematic diagram showing the connection position between an airbag and a base surface in a multi-layer airbag structure provided in an embodiment of this application; Figure 14 A schematic diagram showing the connection position between another airbag and the base surface in a multi-layer airbag structure provided in an embodiment of this application;

[0122] like Figure 13 and Figure 14 As shown, in this application, the airbag 1 is fixed to the base surface 2 by welding, sewing, or a combination of welding and sewing, and the connection between the airbag 1 and the base surface 2 is located in the middle or edge of the airbag 1.

[0123] like Figure 13As shown, it is a middle fixed mode, the air bag 1 is fixed in the middle position of the base surface 2 by welding or sewing, and this fixed mode can make the air bag 1 bulge around the connection position.

[0124] As shown, it is a middle fixed mode, the air bag 1 is fixed in the middle position of the base surface 2 by welding or sewing, and this fixed mode can make the air bag 1 bulge around the connection position. Figure 14 As shown, it is a middle fixed mode, the air bag 1 is fixed in the middle position of the base surface 2 by welding or sewing, and this fixed mode can make the air bag 1 bulge around the connection position.

[0125] The above two fixed modes are applied to the multi-layer air bag structure of the present application, which can present different support effects.

[0126] In addition, in the present application, the air bag 1 is a single-layer air bag or a composite multi-layer air bag. As shown, the composite multi-layer air bag has a smaller effective support range than the large air bag at the same bulging height, which is beneficial to be applied to the scene that needs local support. Figure 17

[0127] In the present application, the base surface 2 is a single-layer base surface 2 or a composite multi-layer base surface 2. By setting the base surface of a certain layer or several layers of air bag in the multi-layer air bag structure as a composite multi-layer base surface, the layer or the several layers of air bag can increase more functional layers such as heating layer, dehumidification layer, etc. in addition to support requirements, and the composite multi-layer base surface provides the possibility for the realization of more functions.

[0128] In the second aspect, the present application provides a device with the multi-layer air bag structure provided by any one of the above embodiments, which is a pillow, a mattress, a massage pad, a massage sofa, an office chair, a single sofa, a car seat, a yoga mat, an inflatable bed and the like.

[0129] Obviously, the above embodiments of the present application are only examples for clear illustration of the present application, and are not a limitation on the embodiments of the present application. Based on the above description, other different forms of changes or variations can be made by those skilled in the art. Here, it is not necessary and impossible to exhaust all the embodiments. Any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the claims of the present application.​

Claims

1. A multi-layered airbag structure, characterized in that, The system includes multiple airbag layers arranged in a layered structure. Each airbag layer includes a base surface (2) and at least one airbag (1) disposed on the base surface (2). The airbag (1) can be independently inflated and deflated. The base surface (2) separates the airbags (1) of adjacent layers. When the rear airbag (1) is inflated, it exerts a supporting force on the adjacent front base surface (2). The base surfaces (2) of the multiple airbag layers are connected together. At least one of the multiple airbag layers includes: the base surface (2) is a rigid backplate (23); A gear adjustment structure is provided, one end of which is fixed to the rigid back plate (23). The gear adjustment structure includes a position adjustment structure and an angle adjustment structure. The airbag (1) is connected to the other end of the gear adjustment structure. The airbag (1) can move relative to the rigid back plate (23) under the adjustment of the position adjustment structure, and can adjust its angle relative to the rigid back plate (23) under the adjustment of the angle adjustment structure. The position adjustment structure includes a rack (51) fixedly mounted on the rigid back plate (23) and a movable cylindrical gear (52), the cylindrical gear (52) meshing with the rack (51); the angle adjustment structure includes a first bevel gear (53) fixedly mounted relative to the cylindrical gear (52) and located inside the cylindrical gear (52), and a second bevel gear (54) with one end meshing with the first bevel gear (53) and the other end fixedly connected to the airbag (1), the angle between the central axis of the second bevel gear (54) and the central axis of the first bevel gear (53) being greater than 0 degrees and less than 90 degrees.

2. The multi-layer airbag structure according to claim 1, characterized in that, Two adjacent airbag layers constitute a double-layer airbag structure, which includes: a first base surface (21) located on the front side and a first airbag (11) disposed on the first base surface (21); a second base surface (22) located on the rear side and a second airbag (12) disposed on the second base surface (22); the first base surface (21) separates the first airbag (11) and the second airbag (12), and the first base surface (21) and the second base surface (22) are rigid base surfaces or base surfaces with a combination of hard and soft.

3. The multi-layer airbag structure according to claim 2, characterized in that, The first base surface (21) is a soft base surface. When the second airbag (12) on the second base surface (22) is inflated, the second airbag (12) applies the supporting force to the first base surface (21) to deform the first base surface (21).

4. The multi-layer airbag structure according to claim 3, characterized in that, The second base surface (22) is a rigid base surface; when the second airbag (12) on the second base surface (22) is not inflated, the first base surface (21) is attached to the second base surface (22), and the first airbag (11) on the first base surface (21) inflates by utilizing the second base surface (22) to provide support force, and inflates along the normal direction of the support part of the second base surface (22); when the second airbag (12) on the second base surface (22) inflates, the first airbag (11) on the first base surface (21) inflates by utilizing the second airbag (12) to provide support force, and inflates along the normal direction of the support part of the second airbag (12).

5. The multi-layer airbag structure according to claim 2, characterized in that, The first base surface (21) is a rigid base surface. The corresponding edges of the first base surface (21) and the second base surface (22) are elastically connected. When the second airbag (12) on the second base surface (22) is inflated, the second airbag (12) applies the supporting force to the first base surface (21) to move the first base surface (21) forward. At least one of the back surface of the first base surface (21) and the outer surface of the inflated second airbag (12) in contact with it is an arc-shaped structure.

6. The multi-layer airbag structure according to claim 5, characterized in that, The second base surface (22) is a rigid base surface; when the second airbag (12) on the second base surface (22) is not inflated, the first airbag (11) on the first base surface (21) inflates by using the first base surface (21) to provide support force and inflates along the normal direction of the support part of the first base surface (21); when the second airbag (12) on the second base surface (22) is inflated, the first base surface (21) and its first airbag (11) can rotate along the outer surface of the second airbag (12).

7. The multi-layer airbag structure according to claim 5, characterized in that, The second base surface (22) is a flexible base surface. The back side of the second base surface (22) is suitable for attaching to the rigid substrate (3) of a product. The edge of the first base surface (21) is elastically connected to the corresponding edge of the second base surface (22) or the corresponding part of the rigid substrate (3). When the second airbag (12) on the second base surface (22) is not inflated, the first airbag (11) on the first base surface (21) is inflated and uses the first base surface (21) to provide support force, and inflates along the normal direction of the support part of the first base surface (21). When the second airbag (12) on the second base surface (22) is inflated, the first base surface (21) and its first airbag (11) can rotate along the outer surface of the second airbag (12).

8. The multi-layer airbag structure according to any one of claims 5-7, characterized in that, The elastic connection is one or any combination of elastic wire (4) or elastic mesh or elastic band woven from elastic wire (4).

9. The multi-layered airbag structure according to any one of claims 1-7, characterized in that, The airbag (1) is fixed to the base surface (2) by welding, sewing, or a combination of welding and sewing. The connection between the airbag (1) and the base surface (2) is located in the middle or edge of the airbag (1).

10. The multi-layered airbag structure according to any one of claims 2-7, characterized in that, When the base surface (2) is a rigid base surface, the plurality of base surfaces (2) are one or any combination of plastic board, wood board, metal board; when the base surface (2) is a soft base surface, the plurality of base surfaces (2) are one or any combination of cloth sheet, mesh sheet, sponge sheet or non-Newtonian fluid.

11. The multi-layered airbag structure according to any one of claims 1-7, characterized in that, The airbag (1) is a single-layer airbag or a composite multi-layer airbag.

12. The multi-layered airbag structure according to any one of claims 1-7, characterized in that, The base surface (2) is a single-layer base surface or a composite multi-layer base surface.

13. A device having a multi-layered airbag structure, characterized in that, Includes the multi-layer airbag structure described in any one of claims 1-12, the device being a pillow, mattress, massage pad, massage sofa, office chair, single sofa, car seat, yoga mat, or inflatable bed.

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