Air bag cushion and mattress

Abstract

The invention relates to an airbag cushion and a mattress. An existing air bag cushion is poor in sealing performance and connection reliability. The cushion comprises a cushion body, the cushion body comprises closely-arranged unit bag bodies, each unit bag body comprises an upper cover, a bottom plate and a sealing ring, a cover cavity which is exposed downwards is formed in the upper cover, the sealing ring and the periphery of the bottom plate are spliced to form a limiting groove, a cavity opening of the cover cavity is inserted into the limiting groove and fixedly connected with the limiting groove through hot melting, and the sealing ring is arranged in the cover cavity. And the periphery of the bottom plate is hermetically connected with the cover cavity. The sealing ring is arranged between the upper cover and the bottom plate, and the upper cover, the bottom plate and the sealing ring are matched, abutted and fixedly connected through hot melting, so that sealing reliability is effectively improved, connecting structure strength is improved, and use experience is improved.

Description

Technical Field

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

[0002] The existing airbag cushion includes closely arranged unit capsules, and the unit capsules include an upper cover and a bottom plate that are independently processed and bonded and fixed. The upper cover is provided with a downwardly exposed cover cavity, and the cavity opening periphery of the cover cavity and the periphery of the top surface of the bottom plate are provided with a flat annular area for fitting. During production, the upper cover is superimposed on the bottom plate so that the corresponding annular area fits tightly and is fixed by welding, so that the bottom plate and the upper cover are sealed and connected. Adjacent unit capsules are connected by welding air pipes, and the upper cover and the bottom plate, and the unit capsules and the air pipes are formed by plane fitting welding to form a sealed welding area. The welding area needs to play a sealing role so that the capsule cavities in the unit capsules are connected to each other and isolated from the external space, and also plays a positioning role in the relative positions of the components to ensure that the relative positions of the unit capsules are fixed.

[0003] During use, the unit bladder will not only expand and contract due to its own inflation and deflation operations, but will also be subject to external forces due to the user lying down, causing the welding area to be frequently and long-term subjected to tearing and pulling forces, and then local tearing and separation will occur, which will cause the unit bladder and the welding area on the trachea to be prone to air leakage, and will also cause the relative positions of the unit bladders to change, shortening the service life of the unit bladder and affecting the user experience. Summary of the invention

[0004] In order to solve the deficiencies of the prior art, the present invention provides an airbag cushion and a mattress, wherein a sealing ring is arranged between the upper cover and the bottom plate, and the three cooperate with each other and are hot-melted and fixedly connected, which not only effectively improves the sealing reliability, but also improves the strength of the connection structure and enhances the user experience.

[0005] The present invention is realized in the following manner: an airbag cushion comprises a cushion body, the cushion body comprises closely arranged unit capsules, the unit capsules comprise an upper cover, a bottom plate and a sealing ring, the upper cover is provided with a downwardly exposed cover cavity, the sealing ring and the periphery of the bottom plate are assembled to form a limiting groove, the cavity opening of the cover cavity is inserted in the limiting groove and fixed by hot melting, so that the periphery of the bottom plate is sealed and connected with the cover cavity. The sealing ring contacts with the bottom plate and encloses to form a limiting groove for inserting the cavity opening of the upper cover, the periphery of the cavity opening of the cover cavity is inserted into the limiting groove and is hot-melted with the sealing ring and the bottom plate respectively, and the upper cover, the bottom plate and the sealing ring form a two-to-two contacting fitting surface, and the fitting surface has different directions, and the connection reliability is improved by increasing the area of ​​the fitting surface contacted between the three, which not only ensures that the capsule cavity of the unit capsule is effectively isolated from the external space, but also effectively prevents the separation of the fitting surface of the unit capsule due to the pulling of any component alone, thereby improving the structural strength of the unit capsule and improving the use experience.

[0006] Preferably, a connecting ring is provided at the bottom of the upper cover, and the connecting ring includes a connecting portion and a clamping portion provided on the outer side of the bottom end of the connecting portion, and the clamping portion is clamped in the limiting groove and fixedly connected to the upper cover through the connecting portion. The connecting ring is formed by extending downward from the peripheral edge of the bottom of the upper cover to ensure the sealing of the connection between the connecting ring and the upper cover. The connecting portion not only plays the role of positioning the clamping portion to ensure that the clamping portion can be inserted into the limiting groove, but also can respectively contact with the sealing ring and the bottom plate to form fitting surfaces with different orientations, effectively improving the strength of the connection structure.

[0007] Preferably, the top surface periphery of the bottom plate is provided with an outer short ring extending upward, and the vertical cross-sectional profile of the sealing ring is L-shaped, including a vertical portion and a horizontal portion arranged on the inner side of the top of the vertical portion, and the sealing ring is stacked on the outer short ring to enclose the limit groove between the top surface of the outer short ring and the bottom surface of the horizontal portion. The upper section of the vertical portion, the horizontal portion and the outer short ring are enclosed to form an inwardly exposed limit groove, which is convenient for the insertion and fixing of the clamping portion, and can also form two-to-two contacting and different oriented fitting surfaces between the upper cover, the bottom plate and the sealing ring, thereby improving the connection sealing by increasing the fitting surface area, improving the performance of the unit capsule against local pulling by setting fitting surfaces with different directions, and improving the strength of the connection structure between the upper cover and the bottom plate.

[0008] Preferably, the inner edge of the top surface of the outer low ring extends upward to form an annular lower protrusion, and the inner end bottom surface of the transverse portion is provided with an upper protrusion, which is suspended above the lower protrusion and forms a notch opening of the limiting groove opening inward, so that the limiting groove is in a shape of a small mouth and a large cavity. The lower protrusion and the upper protrusion correspond vertically and form a notch opening of the limiting groove, and the clamping portion passes through the notch opening and is clamped in the limiting groove, forming a plurality of directional fitting surfaces, and also increasing the area of ​​the fitting surface.

[0009] Preferably, the distance between the corresponding surfaces of the upper protrusion and the lower protrusion is smaller than the distance between the bottom surface of the transverse portion and the outer edge of the top surface of the outer low ring, so that the clamping part is clamped and limited by the limiting groove with a small mouth and a large cavity. The limiting groove is in a small mouth and a large cavity shape, and the contracted groove is used to clamp and position the clamping part, so as to prevent the clamping part from being separated from the limiting groove.

[0010] Preferably, the bottom edge of the upper cover is bent inward to form a horizontal portion connected to the top edge of the connecting portion, and the horizontal portion cooperates with the clamping portion to clamp the horizontal portion to increase the contact area between the upper cover and the sealing ring. The horizontal portion extends inward and reduces the size of the cover cavity opening, which ensures that the connecting portion is set inward and provides space for the clamping portion to extend outward under the cover body, and can also fit with the top wall of the horizontal portion of the sealing ring, thereby increasing the fitting surface and improving the connection reliability and sealing reliability.

[0011] Preferably, an inner high ring is arranged at the periphery of the bottom surface of the bottom plate inside the outer low ring, and the inner high ring and the vertical projection of the connecting portion are mutually offset to enclose a through passage for clamping the connecting portion between the inner high ring and the transverse portion. The inner high ring is arranged higher than the outer low ring, and the top of the inner high ring can cooperate with the transverse portion of the sealing ring to clamp the connecting portion, which not only plays a radial positioning role for the connecting portion, thereby ensuring that the upper cover, the sealing ring and the bottom plate are mutually concentrically arranged, but also increases the fitting surface, and improves the connection reliability and sealing reliability.

[0012] Preferably, the cushion body includes a base, the base is provided with mounting holes arranged in a matrix, and the bottom of the unit capsule is inserted and buckled into the corresponding mounting holes. The unit capsule is inserted and fixed in the corresponding mounting holes, so that the unit capsule is arranged in a matrix on the base, which not only ensures that the relative positions of adjacent unit capsules are fixed, but also facilitates quick assembly.

[0013] Preferably, the middle part of the bottom plate is recessed downward to form a step annular surface, the periphery of the lower port of the mounting hole is extended inward to form a supporting ring, and the unit capsule is inserted into the mounting hole and overlapped on the supporting ring through the step annular surface. The supporting ring and the step annular surface are vertically in conflict with each other, which not only plays the role of supporting the unit capsule to ensure that the unit capsules are arranged at the same height, but also reserves a space in the middle of the supporting ring for the air supply port to be exposed, so that the air port can be connected to the external air source through the air pipe.

[0014] Preferably, a vertically penetrating air port is provided in the middle of the bottom plate, and the unit capsule vertically passes through the mounting hole through the air port and communicates with the outside world. The air port is provided in the middle of the bottom plate, passes through the mounting hole and is connected to the external air source through the air pipe, so that the unit capsule can change its softness and hardness by adjusting the air pressure. The air port is provided in the base, and the base is used to replace the air pipe to assume the function of positioning adjacent unit capsules, so as to ensure that the relative positions between adjacent unit capsules are fixed.

[0015] Preferably, an L-shaped buckle groove is provided on the side wall of the mounting hole, including a vertical groove cavity exposed upward on the top surface of the bottom plate and a horizontal groove cavity provided along the outer edge of the supporting ring. The outer edge of the step ring surface extends outward to form buckles corresponding to the buckle grooves one by one. The unit capsule is installed in the mounting hole and the buckle is inserted and locked in the buckle groove. The buckle is inserted into the buckle groove through the vertical groove cavity and rotated and buckled along the horizontal groove cavity. The horizontal groove cavity is used to vertically limit the buckle, preventing the unit capsule from being separated from the mounting hole, improving the connection reliability, and facilitating disassembly and assembly.

[0016] A mattress comprises an airbag cushion, a limiting pad wrapping the airbag cushion, and an outer cover wrapping the airbag cushion and the limiting pad. The limiting block plays a role of clamping, positioning and protecting the airbag cushion, ensuring that the airbag cushion is adjusted in softness and hardness by inflating and deflating air at a preset position, thereby improving the comfort of the mattress. The outer cover wraps the airbag cushion and the limiting pad, and plays a role of positioning and protecting the airbag cushion and the limiting pad.

[0017] The outstanding beneficial effects of the present invention are as follows: the sealing ring contacts with the bottom plate and encloses to form a limiting groove for the cavity opening of the upper cover to be inserted, the periphery of the cavity opening of the cover is inserted into the limiting groove and is respectively connected with the sealing ring and the bottom plate by hot-melt, and two-to-two contacting fitting surfaces are formed between the upper cover, the bottom plate and the sealing ring, and the fitting surfaces have different orientations. The connection reliability is improved by increasing the area of ​​the fitting surfaces in contact with each other between the three, which not only ensures that the cavity of the unit capsule is effectively isolated from the external space, but also effectively prevents the separation of the fitting surfaces of the unit capsule due to the pulling of any component alone, thereby improving the structural strength of the unit capsule and improving the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the disassembled structure of the airbag cushion described in Example 1;

[0019] Figure 2 It is a schematic diagram of a partial cross-sectional structure of the unit capsule described in Example 1;

[0020] Figure 3 This is a schematic diagram of the structure of the unit capsule described in Example 1;

[0021] Figure 4 It is a partial cross-sectional structural schematic diagram of the upper cover described in Example 1;

[0022] Figure 5 It is a schematic diagram of a partial cross-sectional structure of the sealing ring described in Example 1;

[0023] Figure 6 It is a schematic diagram of a partial cross-sectional structure of the bottom plate described in Example 1;

[0024] Figure 7 It is a schematic diagram of a partial cross-sectional structure of the airbag cushion described in Example 1;

[0025] Figure 8 This is a schematic diagram of the structure of the airbag cushion described in Example 1;

[0026] Fig. 9 This is a schematic diagram of the disassembled structure of the mattress described in Example 2;

[0027] In the figure: 1, unit bag body, 2, upper cover, 3, bottom plate, 4, sealing ring, 5, limiting groove, 6, connecting part, 7, clamping part, 8, outer low ring, 9, vertical part, 10, horizontal part, 11, lower protrusion, 12, upper protrusion, 13, horizontal part, 14, air port, 15, inner high ring, 16, base, 17, mounting hole, 18, step annular surface, 19, supporting ring, 20, buckle groove, 21, fastener, 22, airbag cushion, 23, limiting pad, 24, outer cover. DETAILED DESCRIPTION

[0028] The essential features of the present invention are further described below in conjunction with the accompanying drawings and specific implementation methods.

[0029] Embodiment 1:

[0030] This embodiment provides an airbag cushion.

[0031] like Figure 1 and 2 The airbag cushion shown includes a cushion body, which includes tightly arranged unit capsules 1, and the unit capsules 1 include an upper cover 2, a bottom plate 3 and a sealing ring 4. A cover cavity exposed downward is provided in the upper cover 2, and the sealing ring 4 and the periphery of the bottom plate 3 are spliced ​​together to form a limiting groove 5. The mouth of the cover cavity is inserted into the limiting groove 5 and fixed by hot melting so that the periphery of the bottom plate 3 is sealed and connected to the cover cavity. The sealing ring 4 contacts with the bottom plate 3 and encloses to form a limiting groove 5 for the cover cavity opening of the upper cover 2 to be inserted, and the periphery of the cover cavity opening is inserted into the limiting groove 5 and is hot-melt connected with the sealing ring 4 and the bottom plate 3 respectively, and a pair of contacting fitting surfaces are formed between the upper cover 2, the bottom plate 3 and the sealing ring 4, and the fitting surfaces have different orientations. The connection reliability is improved by increasing the fitting surface area of ​​the pairwise contact between the three, which not only ensures that the capsule cavity of the unit capsule 1 is effectively isolated from the external space, but also can effectively prevent the separation of the fitting surface of the unit capsule 1 due to the pulling of any component alone, thereby improving the structural strength of the unit capsule 1 and improving the user experience.

[0032] In this embodiment, the upper cover 2, the bottom plate 3 and the sealing ring 4 are processed independently and fixed by hot melting after assembly and connection. Fitting surfaces which are formed by two-to-two abutment and have different orientations are provided between the upper cover 2, the bottom plate 3 and the sealing ring 4. This not only improves the sealing effect of the connection by increasing the area of ​​the fitting surface, but also ensures that the three are mutually buckled and locked and effectively resist external forces from all directions by providing fitting surfaces with different orientations, thereby ensuring that the fitting surfaces always remain in a state of adhesion and sealing, thereby ensuring that the upper cover 2, the bottom plate 3 and the sealing ring 4 have good connection reliability and sealing reliability.

[0033] In this embodiment, a horizontal portion 13 (such as Figure 4 As shown), the connecting ring is arranged below the inner edge of the horizontal portion 13, and the connecting ring includes a connecting portion 6 and a clamping portion 7 arranged on the outer side of the bottom end of the connecting portion 6, and the thickness of the clamping portion 7 is greater than the thickness of the connecting portion 6; the vertical cross-sectional profile of the sealing ring 4 is L-shaped (as shown Figure 5 As shown), it includes a vertical portion 9 and a horizontal portion 10 arranged on the inner side of the top of the vertical portion 9, and the inner end bottom surface of the horizontal portion 10 is provided with an upper protrusion 12; the top surface periphery of the bottom plate 3 is provided with an outer short ring 8 extending upward (as shown Figure 6As shown in the figure, the inner edge of the top surface of the outer low ring 8 extends upward to form an annular lower protrusion 11, and the bottom surface periphery of the bottom plate 3 is located inside the outer low ring 8 and is provided with an inner high ring 15. The outer low ring 8 and the inner high ring 15 are both formed by the top surface periphery of the bottom plate 3 extending upward, and the inner high ring 15 is arranged on the inner side of the outer low ring 8 and is arranged higher than the outer low ring 8. The upper cover 2, the sealing ring 4 and the bottom plate 3 are all independently processed and formed, which is convenient for batch processing and overlapping assembly, and effectively improves the production and assembly efficiency. When producing the unit capsule 1:

[0034] First, the sealing ring 4 is installed to the bottom of the upper cover 2, and the connecting portion 6 is bent to separate the clamping portion 7 from the horizontal portion 13, so that the transverse portion 10 of the sealing ring 4 is inserted between the horizontal portion 13 and the clamping portion 7, so that the upper protrusion 12 is inserted between the clamping portion 7 and the connecting portion 6; at this time, the bottom surface of the horizontal portion 13 is in conflict with the top surface of the transverse portion 10 to form a horizontal fitting surface, the connecting portion 6 is in conflict with the transverse portion 10 to form a vertical fitting surface, the upper protrusion 12 is in conflict with the connecting portion 6 and the clamping portion 7 at the same time to form a fitting surface with multiple directions, and the clamping portion 7 is in conflict with the transverse portion 10 and the vertical portion 9 at the same time to form a fitting surface with multiple directions;

[0035] Afterwards, the bottom plate 3 is installed from bottom to top to the bottom of the sealing ring 4, the inner high ring 15 is attached to the inner wall of the connecting portion 6 to form a vertical fitting surface, the outer low ring 8 is attached to the bottom surface of the clamping portion 7 and uses the lower protrusion 11 to form a fitting surface with multiple directions, the outer wall of the outer low ring 8 is in contact with the side wall of the vertical portion 9 of the sealing ring 4 to form a vertical fitting surface, and the peripheral edge of the top surface of the bottom plate 3 is in contact with the bottom surface of the vertical portion 9 of the sealing ring 4 to form a horizontal fitting surface;

[0036] Finally, the upper cover 2, the sealing ring 4 and the bottom plate 3 are fixed by hot-melt bonding so that the bonding surfaces are hot-melt bonded.

[0037] After installation, the sealing ring 4 uses its own deformation to achieve close contact with the upper cover 2 and the bottom plate 3, thereby forming multiple fitting surfaces with different orientations, ensuring that the upper cover 2 and the bottom plate 3 are reliably connected and effectively sealed. In addition, the upper cover 2, the sealing ring 4 and the bottom plate 3 are mutually buckled and locked to ensure that the relative positions of the three are fixed, and the structural strength is used to prevent separation, including but not limited to: the horizontal part 13 and the clamping part 7 vertically clamp and lock the horizontal part 10, the horizontal part 10 and the outer low ring 8 vertically clamp and lock the clamping part 7, the inner high ring 15 and the horizontal part 10 horizontally clamp and lock the connecting part 6, the lower protrusion 11 and the vertical part 9 horizontally clamp and lock the clamping part 7, the upper protrusion 12 and the vertical part 9 horizontally clamp and lock the clamping part 7, etc.

[0038] In this embodiment, the sealing ring 4 is stacked on the outer short ring 8 to enclose the limiting groove 5 between the top surface of the outer short ring 8 and the bottom surface of the transverse portion 10, and the distance between the corresponding surfaces of the upper protrusion 12 and the lower protrusion 11 is smaller than the distance between the bottom surface of the transverse portion 10 and the outer edge of the top surface of the outer short ring 8, so that the clamping portion 7 is clamped and limited by the limiting groove 5 with a small mouth and a large cavity, thereby preventing the clamping portion 7 from escaping from the limiting groove 5.

[0039] In this embodiment, the vertical projections of the inner high ring 15 and the connecting portion 6 are offset from each other, so as to enclose a passage for clamping the connecting portion 6 between the inner high ring 15 and the transverse portion 10, thereby ensuring that the connecting portion 6 can be sleeved on the outside of the inner high ring 15 and fit horizontally, thereby ensuring that the bottom plate 3 and the upper cover 2 are concentrically arranged.

[0040] In this embodiment, the cushion body includes a base 16, and the base 16 is provided with mounting holes 17 arranged in a matrix shape. The bottom of the unit capsule 1 is inserted and buckled into the corresponding mounting holes 17 (such as Figure 8 The diameter of the mounting hole 17 matches the bottom diameter of the unit capsule 1, so that the unit capsule 1 can be inserted into the corresponding mounting hole 17 in an axially vertical posture.

[0041] In this embodiment, the middle portion of the bottom plate 3 is recessed downward to form a step annular surface 18 (eg Figure 7 As shown in the figure, the peripheral edge of the lower end of the mounting hole 17 extends inward to form a supporting ring 19, and the unit capsule 1 is inserted into the mounting hole 17 and overlapped on the supporting ring 19 through the step ring surface 18. An L-shaped buckle groove 20 is provided on the side wall of the mounting hole 17, including a vertical groove cavity exposed upward on the top surface of the bottom plate 3 and a horizontal groove cavity arranged along the outer edge of the supporting ring 19. The outer edge of the step ring surface 18 extends outward to form a buckle 21 corresponding to the buckle groove 20 one by one (as shown in the figure). Figure 3 As shown in the figure, the unit capsule 1 is installed into the installation hole 17 and the fastener 21 is inserted and locked in the fastening groove 20. During installation, the unit capsule 1 is first vertically inserted into the installation hole 17, and the fastener 21 descends along the vertical groove cavity to the horizontal groove cavity at the bottom. The unit capsule 1 then rotates circumferentially and drives the fastener 21 to slide along the horizontal groove cavity to ensure that the unit capsule 1 is fastened and fixed in the installation hole 17.

[0042] In this embodiment, there are at least two fasteners 21 and they are equidistantly spaced along the periphery of the step annular surface 18 . This not only improves the fastening reliability by increasing the number of fasteners 21 , but also facilitates processing and use.

[0043] In this embodiment, a vertically penetrating air port 14 is provided in the middle of the base plate 3, and the unit capsule 1 vertically passes through the mounting hole 17 through the air port 14 and communicates with the outside world. The air port 14 passes through the mounting hole 17 downward with the unit capsule 1 and is exposed at the lower end of the mounting hole 17, which facilitates the air port 14 to be connected to the corresponding air pipe and communicate with the external air source, ensuring that the air pressure in the unit capsule 1 can be adjusted up and down.

[0044] Embodiment 2:

[0045] Compared with the first embodiment, this embodiment provides a mattress.

[0046] like Fig. 9 The mattress shown comprises the airbag cushion 22, a limiting cushion 23 wrapping the airbag cushion 22, and an outer cover 24 including the airbag cushion 22 and the limiting cushion 23. The limiting cushion 23 plays a role in clamping, positioning and protecting the airbag cushion 22, ensuring that the unit bag body 1 on the airbag cushion 22 is adjusted by inflation and deflation at a preset position, which not only ensures that the airbag cushion 22 can provide effective support upwards and improve the support comfort, but also effectively prevents the adjacent airbag cushions 22 from interfering with each other.

[0047] In this embodiment, the limiting pad 23 is provided with perforations, and the number and positions of the perforations are matched one by one with the unit bladder bodies 1 on the airbag cushion 22. During installation, the limiting pad 23 wraps the airbag cushion 22, and the perforations are placed on the corresponding unit bladder bodies 1, so that each unit bladder body 1 is limited by the inner wall of the perforation, ensuring that the unit bladder body 1 can achieve vertical expansion and contraction under the guidance of the perforations, thereby generating vertical support for the user and providing the user with a comfortable support experience.

[0048] The structure and effect of the airbag cushion described in this embodiment are consistent with those of the second embodiment and will not be described in detail.

Claims

1. An airbag cushion, comprising a cushion body, characterized in that: The cushion body comprises tightly arranged unit capsules (1), the unit capsules (1) comprising an upper cover (2), a bottom plate (3) and a sealing ring (4), the upper cover (2) being provided with a cover cavity open downwards, the sealing ring (4) and the periphery of the bottom plate (3) being spliced ​​together to form a limiting groove (5), the opening of the cover cavity being inserted into the limiting groove (5) and fixed by hot melting, so that the periphery of the bottom plate (3) is sealed and connected to the cover cavity.

2. The airbag cushion according to claim 1, characterized in that: A connecting ring is provided at the bottom of the upper cover (2), the connecting ring comprising a connecting portion (6) and a clamping portion (7) arranged outside the bottom end of the connecting portion (6), the clamping portion (7) being clamped in the limiting groove (5) and fixedly connected to the upper cover (2) via the connecting portion (6).

3. An airbag cushion according to claim 2, characterized in that: The top surface periphery of the bottom plate (3) is provided with an outer short ring (8) extending upwards, the vertical cross-sectional profile of the sealing ring (4) is L-shaped, comprising a vertical portion (9) and a horizontal portion (10) arranged on the inner side of the top end of the vertical portion (9), and the sealing ring (4) is stacked on the outer short ring (8) to enclose the limiting groove (5) between the top surface of the outer short ring (8) and the bottom surface of the horizontal portion (10).

4. The airbag cushion according to claim 3, characterized in that: The inner edge of the top surface of the outer short ring (8) extends upward to form an annular lower protrusion (11), and the inner end bottom surface of the transverse portion (10) is provided with an upper protrusion (12), which is suspended above the lower protrusion (11) and forms a notch opening of the limiting groove (5) facing inward, so that the limiting groove (5) has a small mouth and a large cavity.

5. The airbag cushion according to claim 4, characterized in that: The distance between the corresponding surfaces of the upper protrusion (12) and the lower protrusion (11) is smaller than the distance between the bottom surface of the transverse portion (10) and the outer edge of the top surface of the outer short ring (8), so that the clamping portion (7) is clamped and limited by the limiting groove (5) with a small mouth and a large cavity; or, the bottom edge of the upper cover (2) is bent inward to form a horizontal portion (13) connected to the top edge of the connecting portion (6), and the horizontal portion (13) cooperates with the clamping portion (7) to clamp the transverse portion (10) to increase the contact area between the upper cover (2) and the sealing ring (4).

6. The airbag cushion according to claim 3, characterized in that: An inner high ring (15) is provided at the periphery of the bottom surface of the bottom plate (3) and is located inside the outer low ring (8). The vertical projections of the inner high ring (15) and the connecting portion (6) are offset from each other so as to enclose a through passage for clamping the connecting portion (6) between the inner high ring (15) and the transverse portion (10).

7. An airbag cushion according to any one of claims 1 to 6, characterized in that: The cushion body comprises a base (16), the base (16) is provided with mounting holes (17) arranged in a matrix, and the bottom of the unit capsule (1) is inserted and buckled into the corresponding mounting holes (17).

8. The airbag cushion according to claim 7, characterized in that: The middle portion of the bottom plate (3) is recessed downward to form a stepped annular surface (18); the periphery of the lower end of the mounting hole (17) is extended inward to form a supporting ring (19); the unit capsule (1) is inserted into the mounting hole (17) and overlapped on the supporting ring (19) via the stepped annular surface (18).

9. The airbag cushion according to claim 8, characterized in that: A vertically penetrating air port (14) is provided in the middle of the bottom plate (3), and the unit capsule (1) vertically passes through the mounting hole (17) through the air port (14) and communicates with the outside; or, an L-shaped buckle groove (20) is provided on the side wall of the mounting hole (17), including a vertical groove cavity exposed upward on the top surface of the bottom plate (3) and a horizontal groove cavity arranged along the outer edge of the supporting ring (19), and the outer edge of the step ring surface (18) extends outward to form a buckle (21) corresponding to the buckle groove (20) one by one, and the unit capsule (1) is installed in the mounting hole (17) and the buckle (21) is driven to be inserted and locked in the buckle groove (20).

10. A mattress, characterized in that: It comprises the airbag cushion (22) according to any one of claims 1 to 9, a limiting pad (23) wrapping the airbag cushion (22), and an outer cover (24) wrapping the airbag cushion (22) and the limiting pad (23).

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