Air bag, air bag cushion and mattress with large extension

Abstract

The utility model relates to a big air bag, air bag cushion and mattress of telescopic amplitude, the telescopic amplitude of existing air bag is small, influences the use experience, the utility model discloses a bag body, the bag body includes top wall, bottom wall and the side wall of acrossing in top wall and bottom wall circumference interval, the top wall diameter is less than bottom wall diameter, the side wall forms the wrinkle of increasing layer by layer from top to bottom through reciprocating bending, and each inner corner of wrinkle vertical projection is set as staggered to increase the vertical telescopic amplitude of bag body when switching between deflation state and inflation state, set the wrinkle of increasing layer by layer from top to bottom at bag body side wall, make upper layer wrinkle hide to the middle part of lower layer wrinkle when deflation state, and the wrinkle of multilayer hides through vertical staggered insertion, effectively reduce the thickness of air bag under deflation state, and further improve the telescopic amplitude of air bag, also effectively reduce the foreign body sensation, improve the use experience.

Description

Technical Field

[0001] This utility model relates to the field of bedding, specifically to an airbag, an airbag pad, and a mattress. Background Technology

[0002] Existing mattresses contain airbags, which consist of regularly arranged airbags. Each airbag adjusts its pressure to achieve vertical expansion and contraction, serving both to adjust firmness and provide comfortable support, and to apply pressure through repeated expansion and contraction, thus providing a massage effect. However, existing airbags achieve vertical expansion and contraction by creating pleats on the sidewalls. During manufacturing, these pleats are formed by cutting sheets, stacking and bonding them together. Because the sheets are vertically stacked, the airbags retain a considerable height even after deflation, and this height increases with the number of sheets. This results in a limited vertical expansion and contraction range and can cause a noticeable foreign body sensation for the user, negatively impacting the user experience. Utility Model Content

[0003] To address the shortcomings of existing technologies, this invention provides an airbag, airbag pad, and mattress with a large range of expansion and contraction. The side wall of the airbag is provided with pleats that increase in size from top to bottom, so that the upper pleats can be hidden in the middle of the lower pleats when the air is deflated. The multiple pleats are hidden by vertically staggered insertion, which not only effectively reduces the thickness of the airbag when deflated, thereby increasing the range of expansion and contraction of the airbag, but also effectively reduces the feeling of foreign objects and improves the user experience.

[0004] This invention achieves its purpose through the following method: an airbag with a large range of expansion and contraction, comprising a body, a top wall, a bottom wall, and a side wall spanning the periphery of the top and bottom walls. The diameter of the top wall is smaller than that of the bottom wall. The side wall is formed by reciprocating bending to create pleats that increase in size from top to bottom. The vertical projections of the inner corners of the pleats are staggered to increase the vertical expansion and contraction range of the airbag when switching between deflation and inflation states. The side wall of the airbag features pleats that increase in size from top to bottom, each pleat being annular, with a central space for the upper pleats to be embedded and hidden. The upper pleats can be hidden to the center of the lower pleats during deflation. The multiple layers of pleats are vertically staggered and nested for avoidance and concealment, effectively reducing the thickness of the airbag during deflation, thereby increasing the expansion and contraction range of the airbag, and also effectively reducing the feeling of foreign objects and improving the user experience.

[0005] Preferably, the folds form annular inner corners by inward indentation. The inner diameter of the inner corners increases sequentially from top to bottom along the bladder body. When the bladder body switches to the deflation state, the vertical projections of each inner corner on the bottom wall are radially offset, and each inner corner has an independent path to fall towards the bottom wall, thereby reducing the thickness of the bladder body when switching to the deflation state. The inner diameter of the inner corners increases sequentially from top to bottom along the bladder body, ensuring that the upper inner corner can be embedded downward into the area enclosed by the lower inner corner, thus ensuring that each inner corner can be nested along its corresponding independent path. This allows the inner corners to fall and remain on the same horizontal plane, effectively reducing the height of the deflated airbag.

[0006] Preferably, the folds include outwardly bulging outer corners located between adjacent inner corners, with the outer edge diameter of the outer corner being larger than the inner edge diameter of the adjacent inner corner. The outer and inner corners are alternately arranged, and by limiting the outer edge diameter of the outer corners and the inner edge diameter of the adjacent inner corners, the vertical cross-section of the folds is ensured to have a reciprocating wavy shape. This facilitates both the expansion of the airbag after inflation to increase its height and the folding of the airbag after deflation to reduce its height. The range of motion is increased by increasing the upper limit of the airbag height and decreasing the lower limit of the airbag height.

[0007] Preferably, the cross-sectional profile of the outer corner is rounded, and the cross-sectional profile of the inner corner is rounded. This effectively diffuses the force generated by deformation, ensuring that the inner and outer corners will not tear or break due to repeated bending, thus effectively extending the service life of the airbag. Furthermore, by setting the rounded corners, the deformable area is increased, thereby effectively increasing the opening and closing angles of the inner and outer corners and improving the airbag's expansion and contraction range.

[0008] Preferably, the pleats include three vertically spaced outer corners, which not only effectively simplifies the structure and facilitates processing and production, but also ensures that the pleats have a lifting range that meets the needs of use, thus ensuring a good user experience.

[0009] Preferably, the top wall and bottom wall are parallel and coaxially arranged, with the diameter of the top wall being smaller than that of the bottom wall. The top wall moves horizontally along the axis of the bottom wall to form a support platform. The centers of the top wall and bottom wall are vertically aligned, and the support platform always maintains a horizontal posture and is subject to vertical adjustment to generate a vertical force.

[0010] Preferably, the support platform is planar or convex in the middle, which effectively improves the transmission of vertical forces.

[0011] An airbag manufacturing method includes an independently manufactured upper airbag portion with a downward-facing exposed airbag cavity. Both the upper and lower airbag portions are integrally injection molded. The upper airbag portion, removed from the mold, is transferred to a tooling fixture for vertical extrusion until it cools and solidifies, thereby reducing the thickness of the upper airbag portion. Integral injection molding of both the upper and lower airbag portions significantly improves processing efficiency compared to the previous method of layer-by-layer sheet bonding. Reducing the bonding area enhances sealing reliability. After injection molding, the upper airbag portion requires extrusion to shape the sidewalls, transforming it from a semi-finished product with a contour meeting injection molding requirements into a finished product with a contour meeting usage requirements.

[0012] Preferably, the transfer time of the upper bladder from the mold to the tooling fixture is less than 5 seconds to reduce heat loss of the upper bladder. By limiting the transfer time of the upper bladder, heat loss during the transfer process is reduced, thereby ensuring that the upper bladder remains plastic when compressed, and ensuring that the sidewalls of the upper bladder can be compressed to form easily stretchable folds.

[0013] Preferably, the upper bladder is compressed in the tooling fixture for at least 3 minutes. The temperature of the upper bladder will decrease and harden due to exposure to air. Limiting the compression time ensures that the upper bladder can be completely cooled and solidified when it is removed from the tooling fixture, effectively maintaining the wrinkled contour, and also effectively improving the shaping effect, preventing the upper bladder contour from turning into a semi-finished product contour.

[0014] Preferably, the tooling fixture applies a pressure of at least 0.588 MPa to the upper bladder to reduce its thickness. This ensures that the tooling fixture has the pressure to compress the upper bladder and prevents it from wrinkling or sticking together due to excessive compression, thus ensuring that the upper bladder has the ability to extend and retract vertically.

[0015] Preferably, the upper bladder portion is shaped like a frustum, smaller at the top and larger at the bottom, when it leaves the mold, with the folds forming on its sidewalls. The frustum shape of the upper bladder portion during demolding satisfies the requirements of injection molding, facilitating demolding. After demolding, the sidewalls of the upper bladder portion are deformed by extrusion to form a finished product that meets the usage requirements.

[0016] Preferably, the capsule includes a separately processed lower capsule portion, which is sheet-shaped and covers the opening of the upper capsule cavity, then welded and bonded together. The upper capsule portion is stacked on top of the lower capsule portion and welded and bonded together. The lower capsule portion effectively seals the opening of the upper capsule cavity and forms the capsule, facilitating processing and improving the connection sealing performance.

[0017] An airbag cushion includes side-by-side airbag strips, each airbag strip comprising a plurality of airbags. The airbags are equidistantly spaced along the length of the airbag strips, and adjacent airbags are interconnected. The airbag strips comprise multiple airbags arranged in a straight line. The airbag cushion is formed by assembling the airbag strips, effectively improving processing efficiency and allowing the size of the airbag cushion to be adjusted according to requirements to meet usage needs.

[0018] A mattress includes a mattress body comprising a support layer, airbags, a retaining layer fitted over the airbags, a surrounding edge, and a comfort layer stacked on top of the airbags. The retaining layer has slots for vertically inserting the airbags. The airbags are inserted into corresponding slots, allowing the support layer and airbags to overlap and connect. The slots horizontally limit the movement of each airbag, ensuring vertical adjustment through inflation and deflation.

[0019] The beneficial effects of this utility model are as follows: The side wall of the airbag is provided with folds that increase in size from top to bottom. Each fold is annular, and a space is formed in the middle for the upper folds to be embedded and hidden. The upper folds can be hidden in the middle of the lower folds when the air is deflated. The multiple folds are avoided and hidden by vertical staggered nesting, which not only effectively reduces the thickness of the airbag when the airbag is deflated, thereby increasing the expansion and contraction range of the airbag, but also effectively reduces the feeling of foreign objects and improves the user experience. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the airbag in its original state as described in Embodiment 1;

[0021] Figure 2 This is a schematic diagram of the airbag in the inflated state as described in Embodiment 1;

[0022] Figure 3 This is a schematic diagram of the structure of the airbag in the deflation state as described in Embodiment 1;

[0023] Figure 4 This is a partial cross-sectional view of the airbag described in Example 2;

[0024] Figure 5 This is a schematic diagram of the structure of the capsule strip described in Embodiment 2;

[0025] Figure 6 This is a schematic diagram of the airbag cushion described in Example 3;

[0026] Figure 7 This is a schematic diagram of the disassembled structure of the mattress described in Example 4;

[0027] In the diagram: 1. Bag body, 2. Top wall, 3. Bottom wall, 4. Wrinkle, 5. Inner corner, 6. Outer corner, 7. Upper bag part, 8. Lower bag part, 9. Limiting layer, 10. Comfort layer, 11. Through groove, 12. Surrounding edge, 13. Support layer, 14. Bag strip. Detailed Implementation

[0028] The essential features of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0029] Example 1:

[0030] This embodiment provides an airbag with a large range of expansion and contraction.

[0031] As shown in Figures 1, 2, and 3, the airbag includes a body 1, which comprises a top wall 2, a bottom wall 3, and side walls spanning the periphery of the top wall 2 and the bottom wall 3. The diameter of the top wall 2 is smaller than the diameter of the bottom wall 3. The side walls are formed by reciprocating bending, creating pleats 4 that increase in size from top to bottom. The vertical projections of the inner corners 5 of each pleat 4 are staggered to increase the vertical expansion and contraction range of the airbag 1 when switching between deflation and inflation states. The airbag 1 has pleats 4 that increase in size from top to bottom on its side walls. Each layer of pleats 4 is annular, with a central space for the upper pleats 4 to be embedded and hidden. The upper pleats 4 can be hidden in the middle of the lower pleats 4 during deflation. The multiple layers of pleats 4 are vertically staggered and nested to avoid and hide each other, effectively reducing the thickness of the airbag during deflation, thereby increasing the expansion and contraction range of the airbag, and also effectively reducing the feeling of foreign objects and improving the user experience.

[0032] In this embodiment, the sidewall of the bladder 1 is formed by radially reciprocating bending to form folds 4. The folds 4 have vertically alternating outer corners 6 and inner corners 5. The diameter of the outer edge of the outer corner 6 decreases layer by layer from bottom to top, and the diameter of the inner edge of the inner corner 5 decreases layer by layer from bottom to top. This ensures that the bladder 1 has a bottom wall 3 with a larger diameter and a top wall 2 with a smaller diameter, which are connected by the folds 4. It also ensures that the folds 4 can guide the vertical lifting and lowering of the support platform by opening and closing. Furthermore, the area enclosed by the inner edge of the inner corner 5 can be used to provide space for the upper inner corner 5 to fall and hide. By reducing the lower limit of the thickness of the bladder 1 when deflation, the lifting and lowering range of the bladder 1 is increased, effectively reducing the foreign body sensation to the user when the bladder 1 is switched to the deflating state.

[0033] In this embodiment, the airbag 1 has an adjustable air pressure cavity. The height and rigidity of the airbag 1 can be adjusted by regulating the air pressure inside the cavity. When the air pressure inside the cavity is increased to be greater than the external atmospheric pressure through inflation, the airbag is inflated, and the height of the airbag 1 increases with the increase in air pressure inside the cavity until it reaches the upper limit of the vertical extension of the airbag 1. At this time, the angles of the inner corner 5 and the outer corner 6 increase, driving the folds 4 to unfold vertically. When the air pressure inside the cavity is equal to the external atmospheric pressure through deflation, the airbag is in its original state, and the inner corner 5 and the outer corner 6 will reset under non-stress conditions. At this time, the height of the airbag 1 is moderate. When the air pressure inside the cavity is decreased through deflating... When the pressure is less than the external atmospheric pressure, the airbag is in a deflating state. The height of the airbag 1 will decrease as the air pressure inside the airbag cavity decreases until it reaches the lower limit of the vertical compression of the airbag 1. At this time, the angle between the inner corner 5 and the outer hanging angle decreases and drives the inner corner 5 of the upper layer to nest in the area enclosed by the inner corner 5 of the lower layer, and together they fall towards the area enclosed by the inner corner 5 of the bottom layer. This effectively utilizes the area enclosed by the inner corner 5 and ensures that the inner corner 5 of each layer is compressed on the same plane, thereby reducing the lower limit of the vertical compression of the airbag 1.

[0034] In this embodiment, the folds 4 form annular inner corners 5 by inward indentation. The inner diameter of the inner corners 5 increases sequentially from top to bottom along the bladder 1. When the bladder 1 switches to the deflating state, the vertical projections of each inner corner 5 on the bottom wall 3 are radially offset from each other. Each inner corner 5 has an independent path to fall towards the bottom wall 3, thereby reducing the thickness of the bladder 1 when switching to the deflating state. Limiting the outer diameter of the outer corner 6 and the inner diameter of the inner corner 5 ensures that adjacent inner corners 5 can be vertically nested, thereby reducing the height of the bladder 1 after compression. It also limits the contour of the bladder 1, ensuring that the bladder 1 can expand and contract in a preset direction, preventing the top of the bladder 1 from shifting radially when rising, and ensuring that the force can be transmitted vertically upward.

[0035] In this embodiment, the fold 4 includes an outwardly bulging outer corner 6 located between adjacent inner corners 5. The outer diameter of the outer corner 6 is larger than the inner diameter of the adjacent inner corner 5. The outer diameter of the outer corner 6 is larger than the inner diameter of the adjacent inner corner 5 above it and also larger than the diameter of the adjacent inner corner 5 below it, ensuring that the fold 4 is wavy. This facilitates the vertical expansion and contraction of the bladder 1 by the fold 4 through opening and closing, and also maintains the vertical projected area of ​​the bladder 1, effectively reducing the radial deformation amplitude and preventing mutual interference between adjacent bladders 1 during inflation and deflation.

[0036] In this embodiment, the cross-sectional profile of the outer corner 6 is rounded, and the cross-sectional profile of the inner corner 5 is rounded. This effectively diffuses the force generated by deformation, ensuring that the inner corner 5 and the outer corner 6 will not tear or break due to repeated bending, thus effectively extending the service life of the airbag. Furthermore, by setting the rounded corners, the deformable area is increased, thereby effectively increasing the opening and closing angle of the inner corner 5 and the outer corner 6 and improving the airbag's expansion and contraction range.

[0037] In this embodiment, the pleats 4 include three vertically spaced outer corners 6 and inner corners 5 adjacent to the outer corners 6, so that the vertical cross-section of the pleats 4 is W-shaped. This ensures that the vertical extension range of the pleats 4 meets the usage requirements, providing effective lifting height and vertical force. Furthermore, by limiting the number of layers of the pleats 4, the height of the airbag after deflation can be reduced, thereby increasing the vertical extension range of the airbag. This also simplifies the structure and facilitates processing and use. In addition, the number of outer corners 6 of the pleats 4 can also be two, four, five, etc., all of which should be considered specific implementations of this embodiment.

[0038] In this embodiment, the top wall 2 and the bottom wall 3 are parallel and coaxially arranged. The diameter of the top wall 2 is smaller than the diameter of the bottom wall 3. The top wall 2 rises and falls horizontally along the axis of the bottom wall 3 to form a support platform. The circumferential sections of the pleats 4 extend and contract vertically synchronously to ensure that the support platform rises and falls horizontally and remains coaxial with the bottom wall 3 of the airbag, thereby ensuring that the force generated by the vertical extension of the airbag can be transmitted vertically upward. The support platform is planar, so that the vertical force can be transmitted upward evenly. In addition, the support platform can also be raised upward in the middle. Embodiment 2:

[0039] Compared to Embodiment 1, this embodiment provides a processing method.

[0040] A method for manufacturing an airbag, wherein the airbag body 1 includes an independently manufactured upper airbag portion 7 and a lower airbag portion 8 (e.g., ...). Figure 4 As shown, the upper bladder 7 has a downward-facing exposed cavity. Both the upper bladder 7 and the lower bladder 8 are integrally injection molded. The upper bladder 7, removed from the mold, is transferred to a tooling fixture for vertical extrusion until it cools and solidifies, thereby reducing the thickness of the upper bladder 7. The integral injection molding of both the upper bladder 7 and the lower bladder 8 significantly improves processing efficiency compared to the previous method of layer-by-layer sheet bonding. Reducing the bonding area enhances sealing reliability. After injection molding, the upper bladder 7 requires extrusion to shape the sidewalls of the airbag, ensuring that the upper bladder 7, initially a semi-finished product meeting injection molding requirements, is processed into a finished product meeting usage requirements.

[0041] Specifically, the processing is carried out through the following steps:

[0042] First, the upper bladder 7 and the lower bladder 8 are formed by injection molding in one piece using an injection molding machine. The upper bladder 7 has a cavity inside, and the lower bladder 8 is sheet-shaped. At this time, the upper bladder 7 is a semi-finished product. The upper bladder 7 is cooled and shaped to form a finished product.

[0043] Afterwards, the upper bladder 7, which has been removed from the mold cavity, is transferred to the tooling fixture. The transfer time shall not exceed 5 seconds. The upper bladder 7 is then extruded and shaped for at least 3 minutes. The upper bladder 7 is vertically extruded to form compressed folds 4 on its sidewalls until the upper bladder 7 cools and sets.

[0044] Finally, the upper sac 7 is stacked on the lower sac 8 from top to bottom with the sac cavity opening facing downwards, and the periphery of the upper sac cavity opening is attached to the periphery of the lower sac 8 and bonded together by welding.

[0045] After processing, the upper bladder 7 and the lower bladder 8 form the airbag. The airbag has a low height when it is not inflated, and its height can be further reduced by vertical nesting through the inner corner 5 when it is deflated.

[0046] In this embodiment, the transfer time of the upper bladder 7 from the mold to the tooling fixture is less than 5 seconds to reduce heat loss of the upper bladder 7. By limiting the transfer time, it is ensured that the upper bladder 7 still has a high temperature after being transferred into the tooling fixture, thereby ensuring that the sidewall of the upper bladder 7 has plasticity and preventing the upper bladder 7 from cooling and solidifying before being moved into the tooling fixture. This ensures that the force applied by the tooling fixture can permanently change the shape of the sidewall of the upper bladder 7. If the upper bladder 7 has cooled and solidified before being moved into the tooling fixture, the force generated by the tooling fixture can only drive the upper bladder 7 to undergo a reversible deformation, and cannot achieve the purpose of permanent deformation.

[0047] In this embodiment, the compression time of the upper bladder 7 in the tooling fixture is at least 3 minutes. The compression time of the upper bladder 7 needs to be greater than its cooling and shaping time to ensure that the upper bladder 7 completes cooling in the tooling fixture and permanently maintains the shape after compression. This ensures that the processed bladder 1 can use its own restoring deformation performance to squeeze out the air, which can effectively improve the air release speed and also effectively reduce the height of the bladder 1, reducing the feeling of foreign objects.

[0048] In this embodiment, the pressure applied by the tooling fixture to the upper bladder 7 is at least 0.588 MPa to reduce the thickness of the upper bladder 7. This ensures that the pressure applied by the tooling fixture can effectively drive the upper bladder 7 to be vertically compressed and limited, while also reducing the requirements on the equipment and thus reducing production costs.

[0049] In this embodiment, the upper bladder 7 is a semi-finished product when it is removed from the mold, and it is in the shape of a frustum with a smaller top and a larger bottom. The sidewalls form the folds 4. At this time, the angles of the outer corner 6 and the inner corner 5 are both large and obtuse, which facilitates demolding and can also form creases through injection molding. When the upper bladder cavity is squeezed by the tooling fixture, it bends along the creases, thereby reducing the angles of the outer corner 6 and the inner corner 5 to form a finished product.

[0050] In this embodiment, the cyst body 1 includes a separately processed lower cyst portion 8, which is sheet-shaped and covers the cyst cavity opening of the upper cyst portion 7 and is welded and bonded together. The vertical projection of the upper cyst portion 7 falls completely into the lower cyst portion 8, ensuring that the two can be stacked and bonded together to form a cyst cavity isolated from the outside.

[0051] In this embodiment, the upper bladder portion 7 can be provided with a single bladder cavity and adhered to the lower bladder portion 8 to form a single air bladder. Alternatively, the upper bladder portion 7 and the lower bladder portion 8 can be processed into a long strip shape, and several bladder cavities distributed along its length can be formed on the upper bladder portion 7, so that the upper bladder portion 7 and the lower bladder portion 8 adhere to form a bladder strip 14 (e.g., ...). Figure 5 As shown in the figure, this facilitates subsequent assembly and processing, and should also be regarded as a specific implementation method of this embodiment.

[0052] The other structures of the airbag described in this embodiment are the same as those in Embodiment 1, and will not be repeated here.

[0053] Example 3:

[0054] Compared to Embodiment 1, this embodiment provides an airbag cushion.

[0055] like Figure 6 The airbag pad shown includes airbag strips 14 arranged side by side. Each airbag strip 14 includes a plurality of airbags. The airbags are equidistantly distributed along the length of the airbag strip 14, and adjacent airbags are interconnected.

[0056] During processing, airbags are first arranged linearly and bonded together to form airbag strips 14. Then, airbag strips 14 are arranged side by side and bonded together to form an airbag pad. This ensures that the airbag pad has densely arranged airbags, thereby ensuring that each area of ​​the airbag pad has balanced support performance. It also allows for setting different airbag density and airbag pad size as needed to meet the different usage needs of users.

[0057] The other structures of the airbag described in this embodiment are the same as those in Embodiment 1, and will not be repeated here.

[0058] Example 4:

[0059] Compared to Embodiment 3, this embodiment provides a mattress.

[0060] like Figure 7The mattress shown includes a mattress body, characterized in that the mattress body includes a support layer 13, an airbag cushion, a limiting layer 9 fitted onto the airbag cushion, a surrounding edge 12 disposed around the limiting layer 9, and a comfort layer 10 stacked on top of the airbag cushion. The limiting layer 9 has a through groove 11 for vertically embedding the airbag cushion. The airbag cushion, used as a massage airbag, can increase the massage intensity by increasing the range of motion and eliminate the feeling of foreign objects on the user by reducing the thickness of the airbag, thus improving the user experience.

[0061] In this embodiment, the limiting layer 9 has a through groove 11 for vertically embedding the airbag pad. The limiting layer 9 is fitted onto the airbag pad from top to bottom, and each airbag 1 inside the airbag pad is inserted into the corresponding through groove 11, which plays a role in horizontally limiting the airbag 1, ensuring that the airbag 1 can move vertically along its axis during inflation and deflation, which can not only provide comfortable support for the user, but also prevent the airbag 1 from tipping over.

[0062] The other structures of the airbag described in this embodiment are the same as those in Embodiment 3, and will not be repeated here.

Claims

1. An airbag with a large range of expansion and contraction, comprising a body (1), said body (1) including a top wall (2), a bottom wall (3), and a side wall spanning the periphery of the top wall (2) and the bottom wall (3), characterized in that, The diameter of the top wall (2) is smaller than that of the bottom wall (3). The side wall forms folds (4) that increase in size from top to bottom by reciprocating bending. The vertical projections of the inner corners (5) of the folds (4) are staggered to increase the vertical expansion and contraction amplitude of the bladder (1) when switching between the deflating and inflating states.

2. The airbag with a large telescopic range according to claim 1, characterized in that, The folds (4) form annular inner corners (5) by indenting inward. The inner diameter of the inner corners (5) increases sequentially from top to bottom along the bladder (1). When the bladder (1) is switched to the air-evacuation state, the vertical projections of each inner corner (5) on the bottom wall (3) are radially offset from each other. Each inner corner (5) has an independent path to fall towards the bottom wall (3) to reduce the thickness of the bladder (1) when it is switched to the air-evacuation state.

3. The airbag with a large telescopic range according to claim 2, characterized in that, The fold (4) includes an outwardly raised outer corner (6) located between adjacent inner corners (5), the outer edge diameter of the outer corner (6) being larger than the inner edge diameter of the adjacent inner corner (5).

4. The airbag with a large telescopic range according to claim 3, characterized in that, The cross-sectional profile of the outer corner (6) is rounded; or the cross-sectional profile of the inner corner (5) is rounded; or the fold (4) includes three vertically separated outer corners (6).

5. An airbag with a large telescopic range according to any one of claims 1-4, characterized in that, The top wall (2) and the bottom wall (3) are parallel to each other and coaxially arranged. The diameter of the top wall (2) is smaller than the diameter of the bottom wall (3). The top wall (2) moves up and down along the axis of the bottom wall (3) in a horizontal posture to form a support platform. The support platform is either flat or raised in the middle.

6. An airbag cushion comprising side-by-side airbag strips (14), characterized in that, The airbag strip includes several airbags as described in any one of claims 1-5, wherein the airbags are equidistantly distributed along the length of the strip (14), and adjacent airbags are interconnected.

7. A mattress, comprising a mattress body, characterized in that, The pad body includes a support layer (13), an airbag pad as described in claim 6, a limiting layer (9) fitted on the airbag pad, a perimeter (12) surrounding the limiting layer (9), and a comfort layer (10) stacked on top of the airbag pad. The limiting layer (9) has a through groove (11) for vertically embedding the airbag pad.

Images