Air bag with large telescopic amplitude, processing method, air bag cushion and mattress

Abstract

The invention relates to an air bag with large telescopic amplitude, a processing method, an air bag cushion and a mattress. An existing air bag is small in telescopic amplitude, and the use experience is affected. The packaging bag comprises a bag body, the bag body comprises a top wall, a bottom wall and a side wall connected between the periphery of the top wall and the periphery of the bottom wall in a bridging mode, the diameter of the top wall is smaller than that of the bottom wall, the side wall is bent in a reciprocating mode to form wrinkles which are increased layer by layer from top to bottom, and vertical projections of inner corners of the wrinkles are arranged in a staggered mode. Therefore, the vertical stretching amplitude of the bag body is increased when the bag body is switched between the air exhaust state and the air inflation state. The wrinkles which are increased layer by layer from top to bottom are arranged on the side wall of the airbag body, so that the upper-layer wrinkles can be hidden in the middle of the lower-layer wrinkles in the air exhaust state, the multiple layers of wrinkles are hidden through vertical staggered insertion, the thickness of the airbag in the air exhaust state is effectively reduced, then the telescopic amplitude of the airbag is improved, foreign body sensation is effectively reduced, and the use experience is improved.

Description

Technical Field

[0001] The present invention relates to the field of bedding, and in particular to an airbag, a processing method, an airbag cushion and a mattress. Background Art

[0002] Existing mattresses are equipped with airbag cushions, which include regularly arranged airbags. Each airbag expands and contracts vertically by adjusting the air pressure. This allows for both softness and firmness adjustment, providing comfortable support for the user, and repeated expansion and contraction to exert a compressive force on the user, providing a massage. Existing airbags achieve vertical expansion and contraction by providing pleats on the sidewalls. During processing, these pleats are formed by cutting sheets, stacking and bonding them, and forming the pleats. Because the sheets are vertically stacked, the airbags maintain a high height even after deflation, and their height increases with the number of sheets. This results in a small vertical expansion and contraction range, and can also create a noticeable foreign body sensation for the user, impacting the user experience. Summary of the Invention

[0003] In order to address the deficiencies of the prior art, the present invention provides an airbag, a processing method, an airbag cushion and a mattress with a large expansion and contraction range. Pleats that increase gradually from top to bottom are arranged on the side walls of the airbag body, so that the upper pleats can be hidden to the middle of the lower pleats when the air is in a deflated state. The multiple layers of pleats are hidden by vertically offset insertion, which effectively reduces the thickness of the airbag in the deflated state, thereby increasing the expansion and contraction range of the airbag, and effectively reduces the foreign body sensation, thereby improving the user experience.

[0004] The present invention is achieved in the following manner: an airbag with a large expansion and contraction range includes a bladder body, the bladder body including a top wall, a bottom wall, and a side wall spanning the periphery of the top wall and the bottom wall, the top wall having a smaller diameter than the bottom wall, the side wall forming folds that increase in size from top to bottom by reciprocating bending, the vertical projections of the inner corners of the folds being offset from each other to increase the vertical expansion and contraction range of the bladder body when switching between a deflated state and an inflated state. The folds are arranged on the side wall of the bladder body, increasing in size from top to bottom, each layer of folds being annular, with a space formed in the middle for the upper layer of folds to be embedded and hidden. The upper layer of folds can be hidden in the middle of the lower layer of folds in the deflated state. The multiple layers of folds are nested and avoided and hidden by vertical offset, which not only effectively reduces the thickness of the airbag in the deflated state, thereby increasing the expansion and contraction range of the airbag, but also effectively reduces the foreign body sensation and improves the user experience.

[0005] Preferably, the folds are formed into annular inner corners by being recessed inward, and the inner edge diameters of the inner corners are sequentially increased from top to bottom along the bladder body. When the bladder body is switched to the deflated state, the vertical projections of the inner corners on the bottom wall are radially offset from each other, and each inner corner has an independent path that falls toward the bottom wall to reduce the thickness of the bladder body when it is switched to the deflated state. The inner edge diameters of the inner corners are sequentially increased from top to bottom along the bladder body, ensuring that the upper inner corners can be embedded downward into the area enclosed by the lower inner corners, thereby ensuring that each inner corner can be nested along its corresponding independent path, so that the inner corners can fall and remain in the same horizontal plane, effectively reducing the height of the airbag after deflation.

[0006] Preferably, the pleats include outer corners that bulge outward and are located between adjacent inner corners, wherein the outer edge diameter of the outer corners is larger than the inner edge diameter of the adjacent inner corners. The outer corners and the inner corners are alternately arranged, and by limiting the outer edge diameters of the outer corners and the inner edge diameters of the adjacent inner corners, the vertical cross-section of the pleats is ensured to have a reciprocating, wavy shape. This facilitates the airbag to increase in height by stretching after inflation and to decrease in height by folding after deflation, thereby increasing the airbag's upper height limit and decreasing its lower height limit, thereby increasing the range of movement.

[0007] Preferably, the cross-sectional profile of the outer corner is a rounded corner, and the cross-sectional profile of the inner corner is a rounded corner, which effectively diffuses the force generated by the deformation, ensures that the inner corner and the outer corner will not be torn and damaged due to reciprocating bending, effectively extends the service life of the airbag, and also increases the deformable area by setting the rounded corners, thereby effectively increasing the opening and closing angles of the inner corner and the outer corner, and improving the expansion and contraction range of the airbag.

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

[0009] Preferably, the top wall and bottom wall are parallel and coaxially arranged, the top wall has a smaller diameter than the bottom wall, and the top wall is raised and lowered in a horizontal position along the axis of the bottom wall to form a support platform. The centers of the top and bottom walls correspond vertically, and the support platform always maintains a horizontal position and is adjusted to rise and fall to generate a vertical force.

[0010] Preferably, the supporting platform is flat or has an upward bulge in the middle, which effectively improves the transmission effect of the vertical force.

[0011] A method for manufacturing an airbag, wherein the airbag body comprises an independently processed upper airbag portion, the upper airbag portion defining a downwardly exposed airbag cavity. Both the upper and lower airbag portions are integrally injection molded. After removal from the mold, the upper airbag portion is transferred to a fixture for vertical extrusion until cooled and shaped, thereby reducing the thickness of the upper airbag portion. The integral injection molding of both the upper and lower airbag portions significantly improves processing efficiency compared to the previous method of layer-by-layer bonding of sheets, enhancing sealing reliability by reducing adhesion areas. After injection molding the upper airbag portion, the sidewalls of the airbag are shaped by extrusion, enabling the upper airbag portion to be processed from a semi-finished product with a contour that meets injection molding requirements into a finished product with a contour that meets usage requirements.

[0012] Preferably, the time it takes to transfer the upper bladder from the mold to the fixture is less than 5 seconds to reduce heat loss in the upper bladder. By limiting the transfer time of the upper bladder, heat loss during transportation is reduced, thereby ensuring that the upper bladder remains plastic when squeezed, ensuring that the side walls of the upper bladder can be squeezed to form folds that facilitate expansion and contraction.

[0013] Preferably, the upper sac portion is extruded in the fixture for at least 3 minutes. The temperature of the upper sac portion will decrease and harden due to exposure to the air. Limiting the extrusion time not only ensures that the upper sac portion can be completely cooled and shaped when it is separated from the fixture, effectively maintaining the wrinkle contour, but also effectively improves the shaping effect and prevents the contour of the upper sac portion from transforming into the contour of a semi-finished product.

[0014] Preferably, the pressure applied by the tooling fixture to the upper sac portion is at least 0.588 MPa to reduce the thickness of the upper sac portion, ensuring that the tooling fixture has the pressure required to squeeze the upper sac portion for deformation, and that the upper sac portion will not be over-extruded, resulting in wrinkles and adjacent areas being squeezed and adhered, thereby ensuring that the upper sac portion has the ability to expand and contract vertically.

[0015] Preferably, the upper bladder portion, when released from the mold, assumes a truncated cone shape that is smaller at the top and larger at the bottom, with the folds formed on its sidewalls. During demolding, the upper bladder portion maintains a truncated cone shape that is smaller at the top and larger at the bottom, and its profile meets injection molding requirements, facilitating demolding. After demolding, the sidewalls of the upper bladder portion are deformed by extrusion to form a finished product that meets the requirements of use.

[0016] Preferably, the bladder body includes an independently processed lower bladder portion, which is in sheet form and covers the opening of the bladder cavity of the upper bladder portion and is welded and adhered thereto. The upper bladder portion is superimposed on the lower bladder portion and is welded and adhered thereto, effectively sealing the opening of the bladder cavity within the upper bladder portion and forming the bladder body, thereby facilitating processing and improving connection sealing.

[0017] An airbag cushion comprises lateral strips, each of which includes a plurality of airbags spaced evenly along the length of the strip, with adjacent airbags interconnected. The strip comprises a plurality of bladder bodies arranged in a straight line. The airbag cushion is formed by assembling the strips, effectively improving processing efficiency and allowing the size of the airbag cushion to be adjusted as needed to meet user requirements.

[0018] A mattress comprises a cushion body, the cushion body comprising a support layer, an airbag cushion, a limiting layer sleeved over the airbag cushion, a surrounding edge surrounding the limiting layer, and a comfort layer stacked above the airbag cushion. The limiting layer defines through-slots for vertically embedding the airbag cushion. The airbags of the airbag cushion are inserted into corresponding through-slots, thereby overlapping and connecting the support layer and the airbag cushion. The through-slots serve as horizontal limiting mechanisms for the airbags, ensuring that the airbags can be vertically raised and lowered by inflation and deflation.

[0019] The beneficial effects of the present invention are as follows: folds are arranged on the side wall of the airbag, which increase in size from top to bottom. Each layer of folds is annular, and a space is formed in the middle for the upper layer of folds to be embedded and hidden. The upper layer of folds can be hidden in the middle of the lower layer of folds when the airbag is in the deflated state. The multiple layers of folds are avoided and hidden by vertically staggered nesting, which effectively reduces the thickness of the airbag in the deflated state, thereby increasing the expansion and contraction range of the airbag, and effectively reduces the foreign body sensation and improves the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic structural diagram of the airbag in the original state according to the first embodiment;

[0021] Figure 2 This is a schematic structural diagram of the airbag in the inflated state according to the first embodiment;

[0022] Figure 3 This is a schematic structural diagram of the airbag in the first embodiment when it is in a deflated state;

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

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

[0025] Figure 6 This is a schematic structural 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 figure: 1. bladder body, 2. top wall, 3. bottom wall, 4. folds, 5. inner corner, 6. outer corner, 7. upper bladder part, 8. lower bladder part, 9. limiting layer, 10. comfort layer, 11. through groove, 12. surrounding edge, 13. supporting layer, 14. bladder strip. DETAILED DESCRIPTION

[0028] The essential features of the present invention will be further described below with reference to the accompanying drawings and specific implementation methods.

[0029] Example 1:

[0030] This embodiment provides an airbag with a large telescopic range.

[0031] As shown in Figures 1, 2, and 3, the airbag comprises a body 1, comprising a top wall 2, a bottom wall 3, and a sidewall extending between the peripheries of the top wall 2 and the bottom wall 3. The diameter of the top wall 2 is smaller than that of the bottom wall 3. The sidewalls are bent back and forth to form folds 4 that gradually increase in size from top to bottom. The vertical projections of the inner corners 5 of the folds 4 are offset relative to each other to increase the vertical expansion and contraction range of the body 1 when switching between the deflated and inflated states. The folds 4 are arranged on the sidewalls of the body 1, increasing in size from top to bottom. Each layer of folds 4 is annular, with a central space formed for the upper layer of folds 4 to be embedded and hidden. The upper layer of folds 4 can be hidden in the middle of the lower layer of folds 4 when deflated. The multiple layers of folds 4 are nested and hidden by vertical offset, effectively reducing the thickness of the airbag when deflated, thereby increasing its expansion and contraction range, and effectively reducing the foreign body sensation, thereby improving the user experience.

[0032] In this embodiment, the side wall of the capsule 1 is formed into folds 4 by radial reciprocating bending, and the folds 4 have outer corners 6 and inner corners 5 that are vertically alternately arranged. 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 bottom wall 3 with a larger diameter and the top wall 2 with a smaller diameter of the capsule 1 are connected by the folds 4, and also ensures that the folds 4 can guide the vertical lifting of the support platform by opening and closing switching, and can use the area enclosed by the inner edge of the inner corner 5 to provide a space for the inner corner 5 of the upper layer to fall and hide. By reducing the lower limit of the thickness of the capsule 1 when it is deflated, the lifting amplitude of the capsule 1 is increased, and the foreign body sensation caused to the user when the capsule 1 is switched to the deflated state is effectively reduced.

[0033] In this embodiment, the bladder 1 is provided with a bladder cavity with adjustable air pressure, and the height and hardness of the bladder 1 are adjusted by adjusting the air pressure in the bladder cavity. When the air pressure in the bladder cavity is greater than the external atmospheric pressure through the inflation operation, the airbag is in an inflated state, and the height of the bladder 1 increases with the increase of the air pressure in the bladder cavity until it reaches the upper limit of the vertical extension of the bladder 1. At this time, the angles of the inner corner 5 and the outer corner 6 increase and drive the folds 4 to expand vertically; when the air pressure in the bladder cavity is the same as the external atmospheric pressure through deflating, the airbag is in its original state, and the inner corner 5 and the outer corner 6 will be reset under no force. At this time, the height of the bladder 1 is moderate; when the air pressure in the bladder cavity is reduced through the vacuum operation, the bladder 1 is in an inflated state. When the pressure is lower than the external atmospheric pressure, the airbag is in an evacuated state, and the height of the bag 1 will decrease as the air pressure in the bag cavity decreases until it reaches the lower limit of the vertical compression of the bag 1. At this time, the angle between the inner corner 5 and the outer corner is reduced and drives the inner corner 5 of the upper layer to be nested in the area enclosed by the inner corner 5 of the lower layer, and together fall toward the area enclosed by the inner corner 5 of the bottom layer, which effectively utilizes the area enclosed by the inner corner 5 and ensures that the inner corners 5 of each layer are compressed in the same plane, thereby reducing the lower limit of the vertical compression of the bag 1.

[0034] In this embodiment, the folds 4 are formed into annular inner corners 5 by being recessed inward. The inner edge diameter of the inner corners 5 increases sequentially from top to bottom along the bladder 1. When the bladder 1 is switched to the evacuated state, the vertical projections of the inner corners 5 on the bottom wall 3 are radially offset from each other. Each inner corner 5 has an independent path for falling toward the bottom wall 3 to reduce the thickness of the bladder 1 when it is switched to the evacuated state. Limiting the outer edge diameter of the outer corner 6 and the inner edge 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 be telescopically deformed along a preset direction, preventing the top of the bladder 1 from radially offsetting when it is raised, and ensuring that the force can be transmitted vertically upward.

[0035] In this embodiment, the pleats 4 include outwardly bulging outer corners 6 disposed between adjacent inner corners 5. The outer diameter of the outer corners 6 is greater than the inner diameter of the adjacent inner corners 5. The outer diameter of the outer corners 6 is greater than the inner diameter of the adjacent inner corners 5 disposed above it, and also greater than the diameter of the adjacent inner corners 5 disposed below it. This ensures that the pleats 4 are wavy, facilitating the pleats 4 to guide the vertical expansion and contraction of the bladder 1 through opening and closing, while also maintaining the vertical projection area of ​​the bladder 1, effectively reducing the amplitude of radial deformation, and preventing interference between adjacent bladders 1 during inflation and deflation.

[0036] In this embodiment, the cross-sectional profile of the outer corner 6 is a rounded corner, and the cross-sectional profile of the inner corner 5 is a rounded corner, which effectively diffuses the force generated by the deformation, ensures that the inner corner 5 and the outer corner 6 will not be torn and damaged due to reciprocating bending, and effectively extends the service life of the airbag. It also increases the deformable area by setting the rounded corners, thereby effectively increasing the opening and closing angles of the inner corner 5 and the outer corner 6, and improving the expansion and contraction range of the airbag.

[0037] In this embodiment, the pleats 4 include three vertically spaced outer corners 6 and inner corners 5 adjacent to the outer corners 6, resulting in a W-shaped vertical cross-section of the pleats 4. This ensures that the vertical extension of the pleats 4 meets the required height and vertical force, while also reducing the height of the airbag after deflation by limiting the number of pleats 4, thereby increasing the vertical extension and contraction range of the airbag. This also simplifies the structure and facilitates processing and use. Furthermore, 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 bottom wall 3 are parallel to each other and coaxially arranged. The diameter of the top wall 2 is smaller than that 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 simultaneously expand and contract vertically, ensuring 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 expansion of the airbag can be transmitted vertically upward. The support platform is planar, so that the vertical force can be evenly transmitted upward. In addition, the support platform can also be convex in the middle. Example 2:

[0039] Compared with the first embodiment, this embodiment provides a processing method.

[0040] A method for processing an airbag, wherein the airbag body 1 includes an upper airbag portion 7 and a lower airbag portion 8 (such as Figure 4 As shown, the upper bladder portion 7 has a downwardly exposed bladder cavity. The upper bladder portion 7 and the lower bladder portion 8 are both integrally injection molded. After being removed from the mold, the upper bladder portion 7 is transferred to a fixture for vertical extrusion until it cools and sets, thereby reducing the thickness of the upper bladder portion 7. The integral injection molding of the upper bladder portion 7 and the lower bladder portion 8 effectively improves processing efficiency compared to the previous method of bonding sheets layer by layer, and enhances sealing reliability by reducing adhesion areas. After the injection molding of the upper bladder portion 7, the side walls of the airbag are shaped by extrusion, so that the upper bladder portion 7 can be processed from a semi-finished product with a contour that meets the injection molding process requirements to a finished product with a contour that meets the use requirements.

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

[0042] First, an upper bag portion 7 and a lower bag portion 8 are formed by integral injection molding using an injection molding machine. The upper bag portion 7 has a bag cavity therein, and the lower bag portion 8 is in sheet form. At this point, the upper bag portion 7 is a semi-finished product. The upper bag portion 7 is cooled and shaped to form a finished product.

[0043] Afterwards, the upper bladder portion 7 separated from the mold cavity is transferred to a fixture for no more than 5 seconds, and the upper bladder portion 7 is extruded and shaped for at least 3 minutes. The upper bladder portion 7 is vertically extruded to form compressed wrinkles 4 on its side walls until the upper bladder portion 7 cools and is shaped.

[0044] Finally, the upper bag part 7 is stacked on the lower bag part 8 from top to bottom with the bag cavity opening facing downward, and the periphery of the cavity opening of the upper bag cavity is attached to the periphery of the lower bag part 8 and adhered by welding.

[0045] After the processing is completed, the upper bag portion 7 and the lower bag portion 8 form the airbag, which has a relatively low height in a non-inflated state and can be further reduced in height by vertically nesting the inner corner 5 in a deflated state.

[0046] In this embodiment, the transfer time of the upper bladder portion 7 from the mold to the jig is less than 5 seconds to reduce heat loss in the upper bladder portion 7. By limiting the transfer time, the upper bladder portion 7 is ensured to maintain a relatively high temperature when transferred to the jig, thereby ensuring that the sidewalls of the upper bladder portion 7 remain plastic, preventing the upper bladder portion 7 from cooling and setting before being placed in the jig, and ensuring that the force applied by the jig can permanently change the shape of the sidewalls of the upper bladder portion 7. If the upper bladder portion 7 has already cooled and set before being placed in the jig, the force applied by the jig can only cause the upper bladder portion 7 to undergo resettable deformation, failing to achieve the purpose of permanent deformation.

[0047] In this embodiment, the upper bag portion 7 is squeezed in the fixture for at least 3 minutes, and the time the upper bag portion 7 is squeezed needs to be greater than the time it takes to cool and set, ensuring that the upper bag portion 7 is cooled in the fixture and permanently maintains its shape after being squeezed, ensuring that the processed bag body 1 can use its own reset deformation performance to squeeze out the air, which not only effectively increases the deflation speed, but also effectively reduces the height of the bag body 1 and reduces the foreign body sensation.

[0048] In this embodiment, the pressure applied by the fixture to the upper bag portion 7 is at least 0.588 MPa to reduce the thickness of the upper bag portion 7, which not only ensures that the pressure applied by the fixture can effectively drive the upper bag portion 7 to vertically compress and limit, but also reduces the requirements for equipment, thereby reducing production costs.

[0049] In this embodiment, the upper capsule portion 7 is a semi-finished product when it is separated from the mold, and is in the shape of a truncated cone with a small upper part and a large lower part, and its side walls 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 is convenient for demolding and can also form creases by injection molding. The upper capsule cavity is bent along the crease when squeezed by the tooling fixture, and then the finished product is formed by reducing the angles of the outer corner 6 and the inner corner 5.

[0050] In this embodiment, the bladder body 1 includes an independently processed lower bladder portion 8. The lower bladder portion 8 is in the form of a sheet and covers the bladder cavity opening of the upper bladder portion 7 and is welded and bonded together. The vertical projection of the upper bladder portion 7 completely falls within the lower bladder portion 8, ensuring that the two can overlap and bond to form a bladder cavity isolated from the outside world.

[0051] In this embodiment, the upper bag portion 7 can be provided with a single bag cavity and adhered to the lower bag portion 8 to form a single air bag. The upper bag portion 7 and the lower bag portion 8 can also be processed into a long strip, and a plurality of bag cavities are opened on the upper bag portion 7 along its length direction so that the upper bag portion 7 and the lower bag portion 8 are adhered to form a bag strip 14 (such as Figure 5 As shown), it is convenient for 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 consistent with those in the first embodiment and will not be described in detail.

[0053] Example 3:

[0054] Compared with the first embodiment, this embodiment provides an airbag cushion.

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

[0056] During processing, the airbags are first arranged linearly and adhered to form the bag strips 14, and then the bag strips 14 are spliced ​​side by side and adhered to form the airbag cushion. This ensures that the airbags are densely arranged on the airbag cushion, thereby ensuring that each area of ​​the airbag cushion has balanced support performance. In addition, differentiated airbag setting densities and airbag cushion sizes can be set as needed to meet the differentiated usage needs of users.

[0057] The other structures of the airbag described in this embodiment are consistent with those in the first embodiment and will not be described in detail.

[0058] Example 4:

[0059] Compared with the third embodiment, this embodiment provides a mattress.

[0060] like Figure 7The mattress shown includes a cushion body characterized by a support layer 13, an airbag cushion, a limiting layer 9 positioned over the cushion, a surrounding edge 12 surrounding the limiting layer 9, and a comfort layer 10 stacked above the cushion. The limiting layer 9 defines a through slot 11 for the vertical insertion of the airbag cushion. The airbag cushion acts as a massage airbag, increasing the massage intensity by increasing the lifting amplitude and reducing the thickness of the airbag to eliminate the user's foreign body sensation, thus enhancing the user experience.

[0061] In this embodiment, the limiting layer 9 defines a through-slot 11 for the vertical insertion of the airbag cushion. The limiting layer 9 is placed over the airbag cushion from top to bottom, and each bladder 1 within the airbag cushion is inserted into a corresponding through-slot 11, acting as a horizontal limiter for the bladder 1, ensuring that the bladder 1 can vertically expand and contract along its axis during inflation and deflation, providing comfortable support for the user while preventing the bladder 1 from tipping over.

[0062] The other structures of the airbag described in this embodiment are consistent with those in the third embodiment and will not be described in detail.

Claims

1. An airbag with a large telescopic range, comprising a bag body (1), wherein the bag body (1) comprises 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), and the side wall is formed by reciprocating bending to form folds (4) that increase in size from top to bottom. The vertical projections of the inner corners (5) of the folds (4) are staggered with each other to increase the vertical expansion and contraction range of the bladder (1) when switching between the deflated state and the inflated state.

2. The airbag with a large telescopic range according to claim 1, characterized in that: The folds (4) are formed into annular inner corners (5) by being recessed inwards, and the inner edge diameters of the inner corners (5) are arranged to increase in sequence from top to bottom along the sac (1). When the sac (1) is switched to the degassing state, the vertical projections of the inner corners (5) on the bottom wall (3) are radially offset from each other, and each inner corner (5) has an independent path for falling toward the bottom wall (3), so as to reduce the thickness of the sac (1) when it is switched to the degassing state.

3. The airbag with large telescopic range according to claim 2, characterized in that: The folds (4) include outer corners (6) that bulge outward and are located between adjacent inner corners (5), and the outer edge diameter of the outer corner (6) is greater 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 a rounded corner; or, the cross-sectional profile of the inner corner (5) is a rounded corner; or, the fold (4) includes three vertically spaced outer corners (6).

5. The airbag with a large telescopic range according to any one of claims 1 to 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 that of the bottom wall (3). The top wall (2) is raised and lowered along the axis of the bottom wall (3) in a horizontal posture to form a supporting platform. The supporting platform is flat or has a raised center.

6. A method for processing an airbag, wherein the airbag body (1) comprises an independently processed upper airbag portion (7), wherein a downwardly exposed airbag cavity is provided in the upper airbag portion (7), characterized in that: The upper sac portion (7) and the lower sac portion (8) are both formed by integral injection molding. The upper sac portion (7) taken out of the mold is transferred to a fixture for vertical extrusion until it is cooled and shaped, thereby reducing the thickness of the upper sac portion (7).

7. The airbag processing method according to claim 6, characterized in that: The time for transferring the upper bladder portion (7) from the mold to the fixture is less than 5 seconds, so as to reduce the heat loss of the upper bladder portion (7); or, the extrusion time of the upper bladder portion (7) in the fixture is at least 3 minutes; or, the pressure applied by the fixture to the upper bladder portion (7) is at least 0.588 MPa, so as to reduce the thickness of the upper bladder portion (7).

8. The airbag processing method according to claim 6, characterized in that: When the upper bladder portion (7) is separated from the mold, it is in the shape of a truncated cone with a smaller upper portion and a larger lower portion, and its side wall forms the folds (4); or, the bladder body (1) includes an independently processed lower bladder portion (8), and the lower bladder portion (8) is sheet-shaped, and the lower bladder portion (8) covers the bladder cavity opening of the upper bladder portion (7) and is welded and adhered.

9. An airbag cushion comprising airbag strips (14) arranged side by side, characterized in that: The airbag strip comprises several airbags according to any one of claims 1 to 5, wherein the airbags are equidistantly spaced along the length direction of the airbag strip (14), and adjacent airbags are interconnected.

10. A mattress, comprising a mattress body, characterized in that: The cushion body includes a supporting layer (13), the airbag cushion according to claim 9, a limiting layer (9) sleeved on the airbag cushion, a surrounding edge (12) arranged around the limiting layer (9), and a comfort layer (10) stacked on the airbag cushion, and a through groove (11) for vertical embedding of the airbag cushion is provided on the limiting layer (9).

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