Portable multifunctional cushion

Abstract

The portable multifunctional cushion comprises a cushion body and a cushion sleeve used for containing the cushion body, and the cushion body comprises a soft face gasket, a dual-density gasket and a hard face gasket which are sequentially arranged and connected from top to bottom. The double-density gasket comprises a solid fiber layer adjacent to the hard-face gasket and a hollow fiber layer adjacent to the soft-face gasket, the double-density gasket is connected with the soft-face gasket and the hard-face gasket, and folding or unfolding between the double-density gasket and the soft-face gasket and between the double-density gasket and the hard-face gasket is achieved. The folded seat cushion body is placed in the seat cushion sleeve, so that the overall size is reduced, and the seat cushion is convenient to carry, store and clean; by means of the structural design of the soft face gasket, the dual-density gasket and the hard face gasket, the adjacent layers can be folded or unfolded, different use requirements are met, the shape design of ergonomics is met, supporting on the spine and the lumbar vertebra is enhanced, and physical fatigue is relieved to a great extent.

Description

Technical Field

[0001] The utility model relates to the technical field of bedding products, in particular to a portable multifunctional cushion. Background Art

[0002] Seat cushions are daily necessities that enable users to obtain better comfort when in a sitting position.

[0003] Among the cushions on the market today, portable ones have single functions, while multifunctional ones are not convenient to carry. For example, in the prior art CN 213030329 U, although the problems of ventilation, heat dissipation and comfort of the cushion are solved to a certain extent, the cushion is heavy and inconvenient to carry; while in CN 213371040U, the foldable cushion can be folded, so it is more convenient to carry, and can be folded and placed in a backpack during outdoor activities, and can be spread out and laid flat when needed for users to sit or lie down, but the above products are relatively single in use, and can only be used as cushions, and cannot meet more functional requirements.

[0004] Therefore, for those skilled in the art, how to solve the portability and versatility of the seat cushion is one of the work focuses of those skilled in the art. Utility Model Content

[0005] The utility model aims to provide a portable multifunctional seat cushion, which realizes the multifunctionality of the seat cushion, is easy to carry and has a simple structure.

[0006] In order to solve the above-mentioned technical problems, an embodiment of the utility model provides a portable multifunctional cushion, including a cushion body and a cushion cover for placing the cushion body, the cushion body including a soft-surface gasket, a double-density gasket and a hard-surface gasket which are sequentially arranged and connected from top to bottom, the double-density gasket including a solid fiber layer adjacent to the hard-surface gasket and a hollow fiber layer adjacent to the soft-surface gasket, the double-density gasket is connected to the soft-surface gasket and the hard-surface gasket to achieve folding or unfolding between the double-density gasket and the soft-surface gasket and the hard-surface gasket.

[0007] Among them, the number of the soft-surface gasket, the dual-density gasket and the hard-surface gasket is at least one.

[0008] Among them, the cushion body is an integrally formed cushion body with a 3D three-dimensional network structure, and the cushion body is an elastomeric cushion body made of one of thermoplastic polyester, polyethylene, and polypropylene.

[0009] Among them, it also includes a connecting component arranged on the outside of the cushion body, the connecting component includes a button and a buckle rope, the button and the buckle rope are installed at a predetermined position of the cushion body, the buckle rope is movably connected to the button, and is used to fix the cushion body after being folded.

[0010] Among them, the hard surface gasket is a solid thermoplastic elastomer hard surface gasket, the solid fiber layer of the dual-density gasket is a solid thermoplastic elastomer fiber layer, the hollow fiber layer of the dual-density gasket is a hollow polyolefin elastomer fiber layer, and the soft surface gasket is a solid thermoplastic elastomer soft surface gasket.

[0011] Among them, the soft-surface gasket, the dual-density gasket and the hard-surface gasket are rectangular or circular in shape, the cross-sectional shapes and sizes of the soft-surface gasket, the dual-density gasket and the hard-surface gasket are the same, the length of the hard-surface gasket, the dual-density gasket and the soft-surface gasket is 30-50cm, the width is 30-50cm, the height of the hard-surface gasket and the soft-surface gasket is 2-4cm, and the height of the dual-density gasket is 3-6cm.

[0012] Among them, the cushion cover is a waterproof and anti-skid cushion cover, and the waterproof and anti-skid cushion cover is a polyester waterproof and anti-skid cushion cover, a nylon waterproof and anti-skid cushion cover or a cotton waterproof and anti-skid cushion cover.

[0013] Among them, it also includes at least one lifting strap fixedly arranged in the cushion cover, which is used to fix the folded cushion body, and the lifting strap includes a female buckle and a male buckle connected to the cushion cover, and the female buckle and the male buckle are snap-connected.

[0014] Among them, it also includes an elastic connecting band arranged on the dual-density gasket, and the elastic connecting band includes a first elastic connecting band arranged at the connection between the hard surface gasket and the dual-density gasket and a second elastic connecting band arranged at the connection between the dual-density gasket and the soft surface gasket, and the first elastic connecting band and the second elastic connecting band are located on different sides of the dual-density gasket.

[0015] It also includes a zipper opening arranged on the side of the double-density gasket, and the inner wall of the zipper opening is fixedly connected to the hidden zipper strip.

[0016] Compared with the prior art, the portable multifunctional cushion provided by the embodiment of the utility model has the following advantages:

[0017] The portable multifunctional cushion provided by the embodiment of the utility model reduces the overall volume by placing the folded cushion body in the cushion cover, which is convenient for carrying, storing and cleaning the cushion; through the structural design of the soft-surface gasket, the double-density gasket and the hard-surface gasket, the adjacent layers can be folded or unfolded; the double-density gasket adopts air fiber, and the hollow and solid design has the advantages of strong air permeability, strong moisture absorption, antibacterial and anti-odor, and lightness and comfort; the hollow design of the air fiber makes the fiber itself very light and easy to move; the alternating use of the upper and lower surfaces of the cushion fits the structure of the human body, can strengthen the support for the spine and lumbar vertebrae, disperse a part of the back support, and greatly relieve body fatigue; the ergonomic shape design meets different usage needs, fits the structure of the human body, can strengthen the support for the spine and lumbar vertebrae, disperse a part of the back support, and greatly relieve body fatigue. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 A schematic structural diagram of an embodiment of a portable multifunctional seat cushion provided by the utility model;

[0020] Figure 2 A schematic diagram of the folded structure of an embodiment of the portable multifunctional seat cushion provided by the utility model;

[0021] Figure 3 This is a schematic diagram of the unfolded structure of an embodiment of the portable multifunctional seat cushion provided by the utility model;

[0022] Figure 4 A schematic diagram of the structure of a double-density gasket in one embodiment of a portable multifunctional seat cushion provided by the utility model;

[0023] Among them, 10-seat cushion cover, 20-soft gasket, 30-double-density gasket, 40-hard gasket, 50-elastic connecting belt, 60-handle belt, 70-connecting component, 71-button, 72-buckle, 31-zipper opening, 32-solid fiber layer, 33-hollow fiber layer. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] Please refer to Figure 1-Figure 4 , Figure 1 A schematic structural diagram of an embodiment of a portable multifunctional seat cushion provided by the utility model; Figure 2 A schematic diagram of the folded structure of an embodiment of the portable multifunctional seat cushion provided by the utility model; Figure 3 This is a schematic diagram of the unfolded structure of an embodiment of the portable multifunctional seat cushion provided by the utility model; Figure 4 A schematic diagram of the structure of a double-density gasket in one embodiment of a portable multifunctional seat cushion provided by the utility model;

[0026] In a specific embodiment, the portable multifunctional cushion includes a cushion body and a cushion cover 10 for placing the cushion body, the cushion body includes a soft gasket 20, a double-density gasket 30 and a hard gasket 40 which are sequentially arranged and connected from top to bottom, the double-density gasket 30 includes a solid fiber layer 32 adjacent to the hard gasket 40 and a hollow fiber layer 33 adjacent to the soft gasket 20, the double-density gasket 30 is connected to the soft gasket 20 and the hard gasket 40 to achieve folding or unfolding between the double-density gasket 30 and the soft gasket 20 and the hard gasket 40.

[0027] By placing the folded cushion body 10 in the cushion cover, the overall volume is reduced, which makes it convenient to carry, store and clean the cushion. Through the structural design of the soft-surface gasket 20, the double-density gasket 30 and the hard-surface gasket 40, adjacent layers can be folded or unfolded. The double-density gasket adopts air fiber, and the hollow and solid design has the advantages of strong air permeability, strong moisture absorption, antibacterial and anti-odor, and lightness and comfort. The hollow design of the air fiber makes the fiber itself very light and easy to move. The alternating use of the upper and lower surfaces of the cushion fits the structure of the human body, can strengthen the support for the spine and lumbar vertebrae, disperse a part of the back support, and greatly relieve body fatigue. The ergonomic shape design meets different usage needs and fits the structure of the human body. It can strengthen the support for the spine and lumbar vertebrae, disperse a part of the back support, and greatly relieve body fatigue.

[0028] The double-density gasket 30 in the present application adopts a combination of hollow and solid, which ensures the advantages of good air permeability, strong moisture absorption, antibacterial and anti-odor, and lightness and comfort. The hollow design of the air fiber makes the fiber itself very light and easy to move; the hard-surface gasket 40 and the soft-surface gasket 20 have improved elasticity and toughness, and the double-density gasket 30 ensures the supporting force and volume, and plays a role in buffering and rebounding; the hard-surface gasket 40 or the soft-surface gasket 20 can be removed at will, and the hollow layer gasket or the solid layer gasket in the double-density gasket 30 can also be removed at will, or the three can be used in combination to better adjust the height of the seat cushion according to personal preference, which is more convenient.

[0029] In the present application, there is no limitation on the size and quantity of the soft-surface gasket 20, the dual-density gasket 30 and the hard-surface gasket 40. The number of the soft-surface gasket 20, the dual-density gasket 30 and the hard-surface gasket 40 is at least one, and different functional requirements can be achieved by increasing or decreasing the number.

[0030] The material structure of the cushion body is not limited in the present application. The cushion body is an integrally formed cushion body with a 3D three-dimensional network structure. The cushion body is an elastomeric cushion body made of one of thermoplastic polyester, polyethylene, and polypropylene.

[0031] By adding functional materials into polymer raw materials, it can be more effective in antibacterial and maintain a good environment.

[0032] In order to facilitate the fixation of the seat cushion, in one embodiment, the portable multifunctional seat cushion also includes a connecting component 70 arranged on the outside of the seat cushion body, and the connecting component 70 includes a button 72 and a buckle rope 71. The button 72 and the buckle rope 71 are installed at predetermined positions of the seat cushion body, and the buckle rope 71 is movably connected to the button 72 for fixing the seat cushion body after being folded.

[0033] Through the connecting component 70, the buckle rope 71 of the connecting component 70 is movably connected to the button 72, which is used to fix the seat cushion body after folding, thereby facilitating the fixation of the folded seat cushion.

[0034] This application does not limit the number, structure and installation position of the connecting components 70.

[0035] In this application, there is no limitation on the material and thickness of the hard surface gasket 40, the dual-density gasket 30, and the soft surface gasket 20. The hard surface gasket 40 is a solid thermoplastic elastomer hard surface gasket, the solid fiber layer 32 of the dual-density gasket 30 is a solid thermoplastic elastomer fiber layer, the hollow fiber layer 33 of the dual-density gasket 30 is a hollow polyolefin elastomer fiber layer, and the soft surface gasket 20 is a solid thermoplastic elastomer soft surface gasket.

[0036] The production of air fibers in this application requires the process operation of an extruder. During the production process of air fibers, the extruder needs to go through the cleaning, pasting and combination of the spinneret and the distribution plate, the cleaning of the mold coke and the adjustment of the traction roller, the batching and stirring of the raw materials, the screw extrusion and water tank molding, and the traction and placement of the final product.

[0037] To facilitate manufacturing and carrying, in one embodiment, the soft-surface gasket 20, the dual-density gasket 30 and the hard-surface gasket 40 are rectangular or circular in shape, and the cross-sectional shapes and sizes of the soft-surface gasket 20, the dual-density gasket 30 and the hard-surface gasket 40 are the same; the length of the hard-surface gasket 40, the dual-density gasket 30 and the soft-surface gasket 20 is 30-50 cm, and the width is 30-50 cm; the height of the hard-surface gasket 40 and the soft-surface gasket 20 is 2-4 cm, and the height of the double-density gasket 30 is 3-6 cm.

[0038] By making the cross-sectional shapes and sizes of the various layers of the cushion body the same, subsequent carrying is facilitated. When used in combination, if the various layers are used at the same time, they will be subjected to force at the same time, and there will be no or fewer creases, reducing the possibility of damage and improving the reliability and service life of use.

[0039] In the present application, a cushion cover 10 is used to package the cushion body. In order to reduce the interference of the external environment on the cushion body during use, in one embodiment, the cushion cover 10 is a waterproof and non-slip cushion cover 10, and the waterproof and non-slip cushion cover 10 is a polyester waterproof and non-slip cushion cover, a nylon waterproof and non-slip cushion cover or a cotton waterproof and non-slip cushion cover.

[0040] By adopting the waterproof and non-slip cushion cover 10, the use of waterproof materials can reduce the interference of external moisture on the cushion body, and the use of non-slip materials can improve the convenience of force bearing and improve the carrying efficiency.

[0041] In the present application, the anti-skid and waterproof properties can be achieved by integrated molding, that is, the seat cushion cover 10 is made of waterproof material, and then a special process is used to make the anti-skid structure. The anti-skid structure can also be independently set outside the waterproof layer.

[0042] In order to further improve the carrying efficiency, the cushion body is fixed in the cushion cover 10 to avoid relative sliding during movement and improve the fixing efficiency. In one embodiment, the portable multifunctional cushion also includes at least one carrying strap 60 fixedly arranged in the cushion cover 10, which is used to fix the folded cushion body, and the carrying strap 60 includes a female buckle and a male buckle connected to the cushion cover 10, and the female buckle and the male buckle are snap-connected.

[0043] The folded cushion body is fixed by the carrying strap 60 , and the cushion body is wrapped around and fixed by the female buckle and the male buckle, so that the cushion body is directly fixed to the cushion cover 10 , thereby improving the fixing efficiency.

[0044] The present application does not limit the number, installation method, structure, etc. of the handle 60.

[0045] In order to further reduce the volume of the overall seat cushion body and further facilitate carrying, in one embodiment, the portable multifunctional seat cushion also includes an elastic connecting band 50 arranged on the double-density gasket 30, and the elastic connecting band 50 includes a first elastic connecting band arranged at the connection between the hard surface gasket 40 and the double-density gasket 30 and a second elastic connecting band arranged at the connection between the double-density gasket 30 and the soft surface gasket 20, and the first elastic connecting band 50 and the second elastic connecting band 50 are located on different sides of the double-density gasket 30.

[0046] By providing an elastic connecting belt 50 at the connection between the hard surface gasket 40 and the double-density gasket 30 or the double-density gasket 30 and the soft surface gasket 20, the volume of the cushion is reduced, and it is convenient to fold and carry. When the cushion is in use, the cushion is released, with a simple structure and simple operation.

[0047] The present application includes but is not limited to using an elastic connecting belt 50 to reduce the volume of the cushion body. Other structures may also be used, and the elastic connecting belt 50 used may be one or more.

[0048] In order to increase the functionality of the cushion body and adjust the height of the cushion body, in one embodiment, the portable multifunctional cushion also includes a zipper opening 31 arranged on the side of the double-density gasket 30, and the inner wall of the zipper opening 31 is fixedly connected to a hidden zipper strip.

[0049] By opening a zipper opening 31 on the side, the inner wall of the zipper opening 31 is fixedly connected to a hidden zipper strip, so that the height of the seat cushion can be adjusted according to the needs of the user, and it is convenient to disassemble and clean, thereby increasing the functionality of the seat cushion.

[0050] In addition, a certain proportion of antibacterial masterbatch is added to the polymer raw materials of the cushion body in this application to achieve the antibacterial requirements of the product. Antibacterial agents can be roughly divided into inorganic antibacterial agents, organic antibacterial agents and natural antibacterial agents. Inorganic antibacterial agents have good heat resistance, sustainability and resistance to drug resistance, and are also highly safe.

[0051] In order to achieve other required functions, the polymer raw materials can also be functional materials added with lavender, mugwort, tea polyphenols, aloe extract, isatis root or mint, or materials that emit far infrared or negative ions, etc., to give the polymer materials the required functionality according to the design.

[0052] The portable multifunctional cushion in this application has the following advantages:

[0053] The seat cushion body is a 3D network structure formed by one-piece molding of polymer materials, which increases the air permeability of the fiber, reduces the accumulation of heat when in contact with the skin, and makes the skin more comfortable; its internal porous structure can provide good ventilation and water flow, prevent the growth of bacteria and microorganisms, and prevent the generation of odor;

[0054] The seat cushion is made into a foldable style, so that the volume of the seat cushion is reduced and it is convenient to carry. At the same time, a connecting component 70 structure is arranged outside the seat cushion, which can be easily disassembled, cleaned, stored and carried, is not easy to be dirty or wet, is flexible to use, and has strong practicality;

[0055] The double-density gasket 30 used in the middle pad of the seat cushion is a double-density air fiber gasket. The double-density gasket 30 includes a solid fiber layer 32 adjacent to the hard surface gasket 40 and a hollow fiber layer 33 adjacent to the soft surface gasket 20 .

[0056] The combination of hollow and solid ensures good air permeability, strong moisture absorption, antibacterial and anti-odor, lightness and comfort, meeting the needs of comfort after sitting for a long time;

[0057] The cushion can be folded and connected to achieve a variety of different usage states. It can be used as a normal cushion when spread flat on the seat; it can be used as a back cushion when leaning against the back of the chair; after being folded and connected, it can be used as a cushion under the calf when lying down; it can be folded and placed on the table to support the face and head of the user when taking a nap;

[0058] The hard surface gasket 40 or the soft surface gasket 20 can be removed at will, and the hollow layer gasket or the solid layer gasket in the dual-density gasket 30 can also be removed at will, or the three can be combined together, and the user can customize the appropriate height in different scenes according to their needs;

[0059] The rectangular waterproof and non-slip fabric used for the seat cushion cover 10 increases safety, and the non-slip function makes it stable even on a smooth seat;

[0060] Functional materials are added to the polymer raw materials to make them have the effects of antibacterial and deodorizing, natural heating, mildew and mite removal, etc., which can more effectively reduce the breeding of bacteria and maintain a healthy environment.

[0061] In summary, the seat cushion in the present application is made of one material or a combination of several materials, which is moderately soft and hard, has high resilience, is breathable and dry, and is not easy to wear. The internal porous structure can provide good ventilation and moisture flow, prevent the growth of bacteria and microorganisms, and prevent the generation of odors; the combination of hollow and solid double-density air fiber gaskets ensures the advantages of good air permeability, strong moisture absorption, antibacterial and anti-odor, and lightness and comfort. The hollow design of the air fiber makes the fiber itself very light and easy to move; the hard surface gasket and the soft surface gasket have improved elasticity and toughness, and the double-density gasket ensures the supporting force and volume, and plays a role in buffering and rebounding; the hard surface gasket or the soft surface gasket can be removed at will, and the hollow layer gasket or the solid layer gasket in the double-density gasket can also be removed at will, or the three can be used in combination to better adjust the height of the cushion according to personal preference, which is more convenient; functional materials are added to the polymer raw materials to more effectively resist bacteria and maintain a good environment; the design of the three-fold cushion can achieve a variety of different usage states through folding to meet the different functional requirements of different users. Making the seat cushion into a foldable style can greatly reduce the volume and weight, making it convenient for storage and allowing for thorough and timely cleaning, thereby minimizing the breeding of bacteria and mites, improving comfort and extending service life.

[0062] In summary, the portable multifunctional cushion provided by the embodiment of the utility model reduces the overall volume by placing the folded cushion body in the cushion cover, which is convenient for carrying the cushion and is also convenient for storage and cleaning; through the structural design of the soft-surface gasket, the double-density gasket and the hard-surface gasket, the adjacent layers can be folded or unfolded, and the double-density gasket adopts air fiber, and the hollow and solid design has the advantages of strong air permeability, strong moisture absorption, anti-bacteria and anti-odor, and lightness and comfort. The hollow design of the air fiber makes the fiber itself very light and easy to move. The alternating use of the upper and lower surfaces of the cushion fits the structure of the human body, can strengthen the support for the spine and lumbar vertebrae, disperse a part of the back support, and greatly relieve body fatigue. The ergonomic shape design meets different usage needs and fits the structure of the human body. It can strengthen the support for the spine and lumbar vertebrae, disperse a part of the back support, and greatly relieve body fatigue.

[0063] The portable multifunctional cushion provided by the utility model is introduced in detail above. This article uses specific examples to illustrate the principle and implementation method of the utility model. The description of the above embodiments is only used to help understand the method and core idea of ​​the utility model. It should be pointed out that for ordinary technicians in this technical field, without departing from the principle of the utility model, the utility model can also be improved and modified, and these improvements and modifications also fall within the scope of protection of the claims of the utility model.

Claims

1. A portable multifunctional cushion, characterized in that: The invention comprises a cushion body and a cushion cover for placing the cushion body, the cushion body comprises a soft-surface gasket, a double-density gasket and a hard-surface gasket which are sequentially arranged and connected from top to bottom, the double-density gasket comprises a solid fiber layer adjacent to the hard-surface gasket and a hollow fiber layer adjacent to the soft-surface gasket, the double-density gasket is connected to the soft-surface gasket and the hard-surface gasket to achieve folding or unfolding of the double-density gasket, the soft-surface gasket and the hard-surface gasket.

2. The portable multifunctional cushion according to claim 1, characterized in that: The number of the soft-surface gasket, the dual-density gasket and the hard-surface gasket is at least one.

3. The portable multifunctional cushion according to claim 1, characterized in that: The cushion body is an integrally formed cushion body with a 3D three-dimensional network structure, and the cushion body is an elastomeric cushion body made of one of thermoplastic polyester, polyethylene, and polypropylene.

4. The portable multifunctional cushion according to any one of claims 1 to 3, characterized in that: It also includes a connection component arranged outside the cushion body, the connection component includes a button and a buckle rope, the button and the buckle rope are installed at predetermined positions of the cushion body, the buckle rope is movably connected to the button, and is used to fix the cushion body after being folded.

5. The portable multifunctional cushion according to claim 1, characterized in that: The hard surface gasket is a solid thermoplastic elastomer hard surface gasket, the solid fiber layer of the dual-density gasket is a solid thermoplastic elastomer fiber layer, the hollow fiber layer of the dual-density gasket is a hollow polyolefin elastomer fiber layer, and the soft surface gasket is a solid thermoplastic elastomer soft surface gasket.

6. The portable multifunctional cushion according to claim 5, characterized in that: The soft-surface gasket, the dual-density gasket and the hard-surface gasket are rectangular or circular in shape, have the same cross-sectional shape and size, have a length of 30-50cm and a width of 30-50cm, have a height of 2-4cm and have a height of 3-6cm for the dual-density gasket.

7. The portable multifunctional cushion according to claim 1, characterized in that: The cushion cover is a waterproof and anti-skid cushion cover, and the waterproof and anti-skid cushion cover is a polyester waterproof and anti-skid cushion cover, a nylon waterproof and anti-skid cushion cover, or a cotton waterproof and anti-skid cushion cover.

8. The portable multifunctional cushion according to claim 1, characterized in that: It also includes at least one lifting strap fixedly arranged in the cushion cover, which is used to fix the folded cushion body, and the lifting strap includes a female buckle and a male buckle connected to the cushion cover, and the female buckle and the male buckle are snap-connected.

9. The portable multifunctional cushion according to claim 1, characterized in that: It also includes an elastic connecting band arranged on the dual-density gasket, the elastic connecting band includes a first elastic connecting band arranged at the connection between the hard surface gasket and the dual-density gasket and a second elastic connecting band arranged between the dual-density gasket and the soft surface gasket, the first elastic connecting band and the second elastic connecting band are located on different sides of the dual-density gasket.

10. The portable multifunctional cushion according to claim 1, characterized in that: It also includes a zipper opening arranged on the side of the double-density gasket, and the inner wall of the zipper opening is fixedly connected to the hidden zipper strip.

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